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author | Dan Albert <danalbert@google.com> | 2015-06-17 11:09:54 -0700 |
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committer | Dan Albert <danalbert@google.com> | 2015-06-17 14:15:22 -0700 |
commit | f378ebf14df0952eae870c9865bab8326aa8f137 (patch) | |
tree | 31794503eb2a8c64ea5f313b93100f1163afcffb /gcc-4.6/gcc/config/m32c/m32c.c | |
parent | 2c58169824949d3a597d9fa81931e001ef9b1bd0 (diff) | |
download | toolchain_gcc-f378ebf14df0952eae870c9865bab8326aa8f137.tar.gz toolchain_gcc-f378ebf14df0952eae870c9865bab8326aa8f137.tar.bz2 toolchain_gcc-f378ebf14df0952eae870c9865bab8326aa8f137.zip |
Delete old versions of GCC.
Change-Id: I710f125d905290e1024cbd67f48299861790c66c
Diffstat (limited to 'gcc-4.6/gcc/config/m32c/m32c.c')
-rw-r--r-- | gcc-4.6/gcc/config/m32c/m32c.c | 4860 |
1 files changed, 0 insertions, 4860 deletions
diff --git a/gcc-4.6/gcc/config/m32c/m32c.c b/gcc-4.6/gcc/config/m32c/m32c.c deleted file mode 100644 index 83bf86c20..000000000 --- a/gcc-4.6/gcc/config/m32c/m32c.c +++ /dev/null @@ -1,4860 +0,0 @@ -/* Target Code for R8C/M16C/M32C - Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. - Contributed by Red Hat. - - This file is part of GCC. - - GCC is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3, or (at your - option) any later version. - - GCC is distributed in the hope that it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public - License for more details. - - You should have received a copy of the GNU General Public License - along with GCC; see the file COPYING3. If not see - <http://www.gnu.org/licenses/>. */ - -#include "config.h" -#include "system.h" -#include "coretypes.h" -#include "tm.h" -#include "rtl.h" -#include "regs.h" -#include "hard-reg-set.h" -#include "insn-config.h" -#include "conditions.h" -#include "insn-flags.h" -#include "output.h" -#include "insn-attr.h" -#include "flags.h" -#include "recog.h" -#include "reload.h" -#include "diagnostic-core.h" -#include "obstack.h" -#include "tree.h" -#include "expr.h" -#include "optabs.h" -#include "except.h" -#include "function.h" -#include "ggc.h" -#include "target.h" -#include "target-def.h" -#include "tm_p.h" -#include "langhooks.h" -#include "gimple.h" -#include "df.h" - -/* Prototypes */ - -/* Used by m32c_pushm_popm. */ -typedef enum -{ - PP_pushm, - PP_popm, - PP_justcount -} Push_Pop_Type; - -static bool m32c_function_needs_enter (void); -static tree interrupt_handler (tree *, tree, tree, int, bool *); -static tree function_vector_handler (tree *, tree, tree, int, bool *); -static int interrupt_p (tree node); -static int bank_switch_p (tree node); -static int fast_interrupt_p (tree node); -static int interrupt_p (tree node); -static bool m32c_asm_integer (rtx, unsigned int, int); -static int m32c_comp_type_attributes (const_tree, const_tree); -static bool m32c_fixed_condition_code_regs (unsigned int *, unsigned int *); -static struct machine_function *m32c_init_machine_status (void); -static void m32c_insert_attributes (tree, tree *); -static bool m32c_legitimate_address_p (enum machine_mode, rtx, bool); -static bool m32c_addr_space_legitimate_address_p (enum machine_mode, rtx, bool, addr_space_t); -static rtx m32c_function_arg (CUMULATIVE_ARGS *, enum machine_mode, - const_tree, bool); -static bool m32c_pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode, - const_tree, bool); -static void m32c_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode, - const_tree, bool); -static unsigned int m32c_function_arg_boundary (enum machine_mode, const_tree); -static int m32c_pushm_popm (Push_Pop_Type); -static bool m32c_strict_argument_naming (CUMULATIVE_ARGS *); -static rtx m32c_struct_value_rtx (tree, int); -static rtx m32c_subreg (enum machine_mode, rtx, enum machine_mode, int); -static int need_to_save (int); -static rtx m32c_function_value (const_tree, const_tree, bool); -static rtx m32c_libcall_value (enum machine_mode, const_rtx); - -/* Returns true if an address is specified, else false. */ -static bool m32c_get_pragma_address (const char *varname, unsigned *addr); - -#define SYMBOL_FLAG_FUNCVEC_FUNCTION (SYMBOL_FLAG_MACH_DEP << 0) - -#define streq(a,b) (strcmp ((a), (b)) == 0) - -/* Internal support routines */ - -/* Debugging statements are tagged with DEBUG0 only so that they can - be easily enabled individually, by replacing the '0' with '1' as - needed. */ -#define DEBUG0 0 -#define DEBUG1 1 - -#if DEBUG0 -/* This is needed by some of the commented-out debug statements - below. */ -static char const *class_names[LIM_REG_CLASSES] = REG_CLASS_NAMES; -#endif -static int class_contents[LIM_REG_CLASSES][1] = REG_CLASS_CONTENTS; - -/* These are all to support encode_pattern(). */ -static char pattern[30], *patternp; -static GTY(()) rtx patternr[30]; -#define RTX_IS(x) (streq (pattern, x)) - -/* Some macros to simplify the logic throughout this file. */ -#define IS_MEM_REGNO(regno) ((regno) >= MEM0_REGNO && (regno) <= MEM7_REGNO) -#define IS_MEM_REG(rtx) (GET_CODE (rtx) == REG && IS_MEM_REGNO (REGNO (rtx))) - -#define IS_CR_REGNO(regno) ((regno) >= SB_REGNO && (regno) <= PC_REGNO) -#define IS_CR_REG(rtx) (GET_CODE (rtx) == REG && IS_CR_REGNO (REGNO (rtx))) - -static int -far_addr_space_p (rtx x) -{ - if (GET_CODE (x) != MEM) - return 0; -#if DEBUG0 - fprintf(stderr, "\033[35mfar_addr_space: "); debug_rtx(x); - fprintf(stderr, " = %d\033[0m\n", MEM_ADDR_SPACE (x) == ADDR_SPACE_FAR); -#endif - return MEM_ADDR_SPACE (x) == ADDR_SPACE_FAR; -} - -/* We do most RTX matching by converting the RTX into a string, and - using string compares. This vastly simplifies the logic in many of - the functions in this file. - - On exit, pattern[] has the encoded string (use RTX_IS("...") to - compare it) and patternr[] has pointers to the nodes in the RTX - corresponding to each character in the encoded string. The latter - is mostly used by print_operand(). - - Unrecognized patterns have '?' in them; this shows up when the - assembler complains about syntax errors. -*/ - -static void -encode_pattern_1 (rtx x) -{ - int i; - - if (patternp == pattern + sizeof (pattern) - 2) - { - patternp[-1] = '?'; - return; - } - - patternr[patternp - pattern] = x; - - switch (GET_CODE (x)) - { - case REG: - *patternp++ = 'r'; - break; - case SUBREG: - if (GET_MODE_SIZE (GET_MODE (x)) != - GET_MODE_SIZE (GET_MODE (XEXP (x, 0)))) - *patternp++ = 'S'; - encode_pattern_1 (XEXP (x, 0)); - break; - case MEM: - *patternp++ = 'm'; - case CONST: - encode_pattern_1 (XEXP (x, 0)); - break; - case SIGN_EXTEND: - *patternp++ = '^'; - *patternp++ = 'S'; - encode_pattern_1 (XEXP (x, 0)); - break; - case ZERO_EXTEND: - *patternp++ = '^'; - *patternp++ = 'Z'; - encode_pattern_1 (XEXP (x, 0)); - break; - case PLUS: - *patternp++ = '+'; - encode_pattern_1 (XEXP (x, 0)); - encode_pattern_1 (XEXP (x, 1)); - break; - case PRE_DEC: - *patternp++ = '>'; - encode_pattern_1 (XEXP (x, 0)); - break; - case POST_INC: - *patternp++ = '<'; - encode_pattern_1 (XEXP (x, 0)); - break; - case LO_SUM: - *patternp++ = 'L'; - encode_pattern_1 (XEXP (x, 0)); - encode_pattern_1 (XEXP (x, 1)); - break; - case HIGH: - *patternp++ = 'H'; - encode_pattern_1 (XEXP (x, 0)); - break; - case SYMBOL_REF: - *patternp++ = 's'; - break; - case LABEL_REF: - *patternp++ = 'l'; - break; - case CODE_LABEL: - *patternp++ = 'c'; - break; - case CONST_INT: - case CONST_DOUBLE: - *patternp++ = 'i'; - break; - case UNSPEC: - *patternp++ = 'u'; - *patternp++ = '0' + XCINT (x, 1, UNSPEC); - for (i = 0; i < XVECLEN (x, 0); i++) - encode_pattern_1 (XVECEXP (x, 0, i)); - break; - case USE: - *patternp++ = 'U'; - break; - case PARALLEL: - *patternp++ = '|'; - for (i = 0; i < XVECLEN (x, 0); i++) - encode_pattern_1 (XVECEXP (x, 0, i)); - break; - case EXPR_LIST: - *patternp++ = 'E'; - encode_pattern_1 (XEXP (x, 0)); - if (XEXP (x, 1)) - encode_pattern_1 (XEXP (x, 1)); - break; - default: - *patternp++ = '?'; -#if DEBUG0 - fprintf (stderr, "can't encode pattern %s\n", - GET_RTX_NAME (GET_CODE (x))); - debug_rtx (x); - gcc_unreachable (); -#endif - break; - } -} - -static void -encode_pattern (rtx x) -{ - patternp = pattern; - encode_pattern_1 (x); - *patternp = 0; -} - -/* Since register names indicate the mode they're used in, we need a - way to determine which name to refer to the register with. Called - by print_operand(). */ - -static const char * -reg_name_with_mode (int regno, enum machine_mode mode) -{ - int mlen = GET_MODE_SIZE (mode); - if (regno == R0_REGNO && mlen == 1) - return "r0l"; - if (regno == R0_REGNO && (mlen == 3 || mlen == 4)) - return "r2r0"; - if (regno == R0_REGNO && mlen == 6) - return "r2r1r0"; - if (regno == R0_REGNO && mlen == 8) - return "r3r1r2r0"; - if (regno == R1_REGNO && mlen == 1) - return "r1l"; - if (regno == R1_REGNO && (mlen == 3 || mlen == 4)) - return "r3r1"; - if (regno == A0_REGNO && TARGET_A16 && (mlen == 3 || mlen == 4)) - return "a1a0"; - return reg_names[regno]; -} - -/* How many bytes a register uses on stack when it's pushed. We need - to know this because the push opcode needs to explicitly indicate - the size of the register, even though the name of the register - already tells it that. Used by m32c_output_reg_{push,pop}, which - is only used through calls to ASM_OUTPUT_REG_{PUSH,POP}. */ - -static int -reg_push_size (int regno) -{ - switch (regno) - { - case R0_REGNO: - case R1_REGNO: - return 2; - case R2_REGNO: - case R3_REGNO: - case FLG_REGNO: - return 2; - case A0_REGNO: - case A1_REGNO: - case SB_REGNO: - case FB_REGNO: - case SP_REGNO: - if (TARGET_A16) - return 2; - else - return 3; - default: - gcc_unreachable (); - } -} - -static int *class_sizes = 0; - -/* Given two register classes, find the largest intersection between - them. If there is no intersection, return RETURNED_IF_EMPTY - instead. */ -static int -reduce_class (int original_class, int limiting_class, int returned_if_empty) -{ - int cc = class_contents[original_class][0]; - int i, best = NO_REGS; - int best_size = 0; - - if (original_class == limiting_class) - return original_class; - - if (!class_sizes) - { - int r; - class_sizes = (int *) xmalloc (LIM_REG_CLASSES * sizeof (int)); - for (i = 0; i < LIM_REG_CLASSES; i++) - { - class_sizes[i] = 0; - for (r = 0; r < FIRST_PSEUDO_REGISTER; r++) - if (class_contents[i][0] & (1 << r)) - class_sizes[i]++; - } - } - - cc &= class_contents[limiting_class][0]; - for (i = 0; i < LIM_REG_CLASSES; i++) - { - int ic = class_contents[i][0]; - - if ((~cc & ic) == 0) - if (best_size < class_sizes[i]) - { - best = i; - best_size = class_sizes[i]; - } - - } - if (best == NO_REGS) - return returned_if_empty; - return best; -} - -/* Used by m32c_register_move_cost to determine if a move is - impossibly expensive. */ -static bool -class_can_hold_mode (reg_class_t rclass, enum machine_mode mode) -{ - /* Cache the results: 0=untested 1=no 2=yes */ - static char results[LIM_REG_CLASSES][MAX_MACHINE_MODE]; - - if (results[(int) rclass][mode] == 0) - { - int r; - results[rclass][mode] = 1; - for (r = 0; r < FIRST_PSEUDO_REGISTER; r++) - if (in_hard_reg_set_p (reg_class_contents[(int) rclass], mode, r) - && HARD_REGNO_MODE_OK (r, mode)) - { - results[rclass][mode] = 2; - break; - } - } - -#if DEBUG0 - fprintf (stderr, "class %s can hold %s? %s\n", - class_names[(int) rclass], mode_name[mode], - (results[rclass][mode] == 2) ? "yes" : "no"); -#endif - return results[(int) rclass][mode] == 2; -} - -/* Run-time Target Specification. */ - -/* Memregs are memory locations that gcc treats like general - registers, as there are a limited number of true registers and the - m32c families can use memory in most places that registers can be - used. - - However, since memory accesses are more expensive than registers, - we allow the user to limit the number of memregs available, in - order to try to persuade gcc to try harder to use real registers. - - Memregs are provided by m32c-lib1.S. -*/ - -int target_memregs = 16; -static bool target_memregs_set = FALSE; -int ok_to_change_target_memregs = TRUE; - -#undef TARGET_HANDLE_OPTION -#define TARGET_HANDLE_OPTION m32c_handle_option -static bool -m32c_handle_option (size_t code, - const char *arg ATTRIBUTE_UNUSED, - int value ATTRIBUTE_UNUSED) -{ - if (code == OPT_memregs_) - { - target_memregs_set = TRUE; - target_memregs = atoi (arg); - } - return TRUE; -} - -/* Implements TARGET_OPTION_OVERRIDE. */ - -#undef TARGET_OPTION_OVERRIDE -#define TARGET_OPTION_OVERRIDE m32c_option_override - -static void -m32c_option_override (void) -{ - /* We limit memregs to 0..16, and provide a default. */ - if (target_memregs_set) - { - if (target_memregs < 0 || target_memregs > 16) - error ("invalid target memregs value '%d'", target_memregs); - } - else - target_memregs = 16; - - if (TARGET_A24) - flag_ivopts = 0; - - /* This target defaults to strict volatile bitfields. */ - if (flag_strict_volatile_bitfields < 0) - flag_strict_volatile_bitfields = 1; - - /* r8c/m16c have no 16-bit indirect call, so thunks are involved. - This is always worse than an absolute call. */ - if (TARGET_A16) - flag_no_function_cse = 1; - - /* This wants to put insns between compares and their jumps. */ - /* FIXME: The right solution is to properly trace the flags register - values, but that is too much work for stage 4. */ - flag_combine_stack_adjustments = 0; -} - -#undef TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE -#define TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE m32c_override_options_after_change - -static void -m32c_override_options_after_change (void) -{ - if (TARGET_A16) - flag_no_function_cse = 1; -} - -/* Defining data structures for per-function information */ - -/* The usual; we set up our machine_function data. */ -static struct machine_function * -m32c_init_machine_status (void) -{ - return ggc_alloc_cleared_machine_function (); -} - -/* Implements INIT_EXPANDERS. We just set up to call the above - function. */ -void -m32c_init_expanders (void) -{ - init_machine_status = m32c_init_machine_status; -} - -/* Storage Layout */ - -/* Register Basics */ - -/* Basic Characteristics of Registers */ - -/* Whether a mode fits in a register is complex enough to warrant a - table. */ -static struct -{ - char qi_regs; - char hi_regs; - char pi_regs; - char si_regs; - char di_regs; -} nregs_table[FIRST_PSEUDO_REGISTER] = -{ - { 1, 1, 2, 2, 4 }, /* r0 */ - { 0, 1, 0, 0, 0 }, /* r2 */ - { 1, 1, 2, 2, 0 }, /* r1 */ - { 0, 1, 0, 0, 0 }, /* r3 */ - { 0, 1, 1, 0, 0 }, /* a0 */ - { 0, 1, 1, 0, 0 }, /* a1 */ - { 0, 1, 1, 0, 0 }, /* sb */ - { 0, 1, 1, 0, 0 }, /* fb */ - { 0, 1, 1, 0, 0 }, /* sp */ - { 1, 1, 1, 0, 0 }, /* pc */ - { 0, 0, 0, 0, 0 }, /* fl */ - { 1, 1, 1, 0, 0 }, /* ap */ - { 1, 1, 2, 2, 4 }, /* mem0 */ - { 1, 1, 2, 2, 4 }, /* mem1 */ - { 1, 1, 2, 2, 4 }, /* mem2 */ - { 1, 1, 2, 2, 4 }, /* mem3 */ - { 1, 1, 2, 2, 4 }, /* mem4 */ - { 1, 1, 2, 2, 0 }, /* mem5 */ - { 1, 1, 2, 2, 0 }, /* mem6 */ - { 1, 1, 0, 0, 0 }, /* mem7 */ -}; - -/* Implements TARGET_CONDITIONAL_REGISTER_USAGE. We adjust the number - of available memregs, and select which registers need to be preserved - across calls based on the chip family. */ - -#undef TARGET_CONDITIONAL_REGISTER_USAGE -#define TARGET_CONDITIONAL_REGISTER_USAGE m32c_conditional_register_usage -void -m32c_conditional_register_usage (void) -{ - int i; - - if (0 <= target_memregs && target_memregs <= 16) - { - /* The command line option is bytes, but our "registers" are - 16-bit words. */ - for (i = (target_memregs+1)/2; i < 8; i++) - { - fixed_regs[MEM0_REGNO + i] = 1; - CLEAR_HARD_REG_BIT (reg_class_contents[MEM_REGS], MEM0_REGNO + i); - } - } - - /* M32CM and M32C preserve more registers across function calls. */ - if (TARGET_A24) - { - call_used_regs[R1_REGNO] = 0; - call_used_regs[R2_REGNO] = 0; - call_used_regs[R3_REGNO] = 0; - call_used_regs[A0_REGNO] = 0; - call_used_regs[A1_REGNO] = 0; - } -} - -/* How Values Fit in Registers */ - -/* Implements HARD_REGNO_NREGS. This is complicated by the fact that - different registers are different sizes from each other, *and* may - be different sizes in different chip families. */ -static int -m32c_hard_regno_nregs_1 (int regno, enum machine_mode mode) -{ - if (regno == FLG_REGNO && mode == CCmode) - return 1; - if (regno >= FIRST_PSEUDO_REGISTER) - return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD); - - if (regno >= MEM0_REGNO && regno <= MEM7_REGNO) - return (GET_MODE_SIZE (mode) + 1) / 2; - - if (GET_MODE_SIZE (mode) <= 1) - return nregs_table[regno].qi_regs; - if (GET_MODE_SIZE (mode) <= 2) - return nregs_table[regno].hi_regs; - if (regno == A0_REGNO && mode == SImode && TARGET_A16) - return 2; - if ((GET_MODE_SIZE (mode) <= 3 || mode == PSImode) && TARGET_A24) - return nregs_table[regno].pi_regs; - if (GET_MODE_SIZE (mode) <= 4) - return nregs_table[regno].si_regs; - if (GET_MODE_SIZE (mode) <= 8) - return nregs_table[regno].di_regs; - return 0; -} - -int -m32c_hard_regno_nregs (int regno, enum machine_mode mode) -{ - int rv = m32c_hard_regno_nregs_1 (regno, mode); - return rv ? rv : 1; -} - -/* Implements HARD_REGNO_MODE_OK. The above function does the work - already; just test its return value. */ -int -m32c_hard_regno_ok (int regno, enum machine_mode mode) -{ - return m32c_hard_regno_nregs_1 (regno, mode) != 0; -} - -/* Implements MODES_TIEABLE_P. In general, modes aren't tieable since - registers are all different sizes. However, since most modes are - bigger than our registers anyway, it's easier to implement this - function that way, leaving QImode as the only unique case. */ -int -m32c_modes_tieable_p (enum machine_mode m1, enum machine_mode m2) -{ - if (GET_MODE_SIZE (m1) == GET_MODE_SIZE (m2)) - return 1; - -#if 0 - if (m1 == QImode || m2 == QImode) - return 0; -#endif - - return 1; -} - -/* Register Classes */ - -/* Implements REGNO_REG_CLASS. */ -enum reg_class -m32c_regno_reg_class (int regno) -{ - switch (regno) - { - case R0_REGNO: - return R0_REGS; - case R1_REGNO: - return R1_REGS; - case R2_REGNO: - return R2_REGS; - case R3_REGNO: - return R3_REGS; - case A0_REGNO: - return A0_REGS; - case A1_REGNO: - return A1_REGS; - case SB_REGNO: - return SB_REGS; - case FB_REGNO: - return FB_REGS; - case SP_REGNO: - return SP_REGS; - case FLG_REGNO: - return FLG_REGS; - default: - if (IS_MEM_REGNO (regno)) - return MEM_REGS; - return ALL_REGS; - } -} - -/* Implements REG_CLASS_FROM_CONSTRAINT. Note that some constraints only match - for certain chip families. */ -int -m32c_reg_class_from_constraint (char c ATTRIBUTE_UNUSED, const char *s) -{ - if (memcmp (s, "Rsp", 3) == 0) - return SP_REGS; - if (memcmp (s, "Rfb", 3) == 0) - return FB_REGS; - if (memcmp (s, "Rsb", 3) == 0) - return SB_REGS; - if (memcmp (s, "Rcr", 3) == 0) - return TARGET_A16 ? CR_REGS : NO_REGS; - if (memcmp (s, "Rcl", 3) == 0) - return TARGET_A24 ? CR_REGS : NO_REGS; - if (memcmp (s, "R0w", 3) == 0) - return R0_REGS; - if (memcmp (s, "R1w", 3) == 0) - return R1_REGS; - if (memcmp (s, "R2w", 3) == 0) - return R2_REGS; - if (memcmp (s, "R3w", 3) == 0) - return R3_REGS; - if (memcmp (s, "R02", 3) == 0) - return R02_REGS; - if (memcmp (s, "R13", 3) == 0) - return R13_REGS; - if (memcmp (s, "R03", 3) == 0) - return R03_REGS; - if (memcmp (s, "Rdi", 3) == 0) - return DI_REGS; - if (memcmp (s, "Rhl", 3) == 0) - return HL_REGS; - if (memcmp (s, "R23", 3) == 0) - return R23_REGS; - if (memcmp (s, "Ra0", 3) == 0) - return A0_REGS; - if (memcmp (s, "Ra1", 3) == 0) - return A1_REGS; - if (memcmp (s, "Raa", 3) == 0) - return A_REGS; - if (memcmp (s, "Raw", 3) == 0) - return TARGET_A16 ? A_REGS : NO_REGS; - if (memcmp (s, "Ral", 3) == 0) - return TARGET_A24 ? A_REGS : NO_REGS; - if (memcmp (s, "Rqi", 3) == 0) - return QI_REGS; - if (memcmp (s, "Rad", 3) == 0) - return AD_REGS; - if (memcmp (s, "Rsi", 3) == 0) - return SI_REGS; - if (memcmp (s, "Rhi", 3) == 0) - return HI_REGS; - if (memcmp (s, "Rhc", 3) == 0) - return HC_REGS; - if (memcmp (s, "Rra", 3) == 0) - return RA_REGS; - if (memcmp (s, "Rfl", 3) == 0) - return FLG_REGS; - if (memcmp (s, "Rmm", 3) == 0) - { - if (fixed_regs[MEM0_REGNO]) - return NO_REGS; - return MEM_REGS; - } - - /* PSImode registers - i.e. whatever can hold a pointer. */ - if (memcmp (s, "Rpi", 3) == 0) - { - if (TARGET_A16) - return HI_REGS; - else - return RA_REGS; /* r2r0 and r3r1 can hold pointers. */ - } - - /* We handle this one as an EXTRA_CONSTRAINT. */ - if (memcmp (s, "Rpa", 3) == 0) - return NO_REGS; - - if (*s == 'R') - { - fprintf(stderr, "unrecognized R constraint: %.3s\n", s); - gcc_unreachable(); - } - - return NO_REGS; -} - -/* Implements REGNO_OK_FOR_BASE_P. */ -int -m32c_regno_ok_for_base_p (int regno) -{ - if (regno == A0_REGNO - || regno == A1_REGNO || regno >= FIRST_PSEUDO_REGISTER) - return 1; - return 0; -} - -#define DEBUG_RELOAD 0 - -/* Implements PREFERRED_RELOAD_CLASS. In general, prefer general - registers of the appropriate size. */ -int -m32c_preferred_reload_class (rtx x, int rclass) -{ - int newclass = rclass; - -#if DEBUG_RELOAD - fprintf (stderr, "\npreferred_reload_class for %s is ", - class_names[rclass]); -#endif - if (rclass == NO_REGS) - rclass = GET_MODE (x) == QImode ? HL_REGS : R03_REGS; - - if (reg_classes_intersect_p (rclass, CR_REGS)) - { - switch (GET_MODE (x)) - { - case QImode: - newclass = HL_REGS; - break; - default: - /* newclass = HI_REGS; */ - break; - } - } - - else if (newclass == QI_REGS && GET_MODE_SIZE (GET_MODE (x)) > 2) - newclass = SI_REGS; - else if (GET_MODE_SIZE (GET_MODE (x)) > 4 - && ~class_contents[rclass][0] & 0x000f) - newclass = DI_REGS; - - rclass = reduce_class (rclass, newclass, rclass); - - if (GET_MODE (x) == QImode) - rclass = reduce_class (rclass, HL_REGS, rclass); - -#if DEBUG_RELOAD - fprintf (stderr, "%s\n", class_names[rclass]); - debug_rtx (x); - - if (GET_CODE (x) == MEM - && GET_CODE (XEXP (x, 0)) == PLUS - && GET_CODE (XEXP (XEXP (x, 0), 0)) == PLUS) - fprintf (stderr, "Glorm!\n"); -#endif - return rclass; -} - -/* Implements PREFERRED_OUTPUT_RELOAD_CLASS. */ -int -m32c_preferred_output_reload_class (rtx x, int rclass) -{ - return m32c_preferred_reload_class (x, rclass); -} - -/* Implements LIMIT_RELOAD_CLASS. We basically want to avoid using - address registers for reloads since they're needed for address - reloads. */ -int -m32c_limit_reload_class (enum machine_mode mode, int rclass) -{ -#if DEBUG_RELOAD - fprintf (stderr, "limit_reload_class for %s: %s ->", - mode_name[mode], class_names[rclass]); -#endif - - if (mode == QImode) - rclass = reduce_class (rclass, HL_REGS, rclass); - else if (mode == HImode) - rclass = reduce_class (rclass, HI_REGS, rclass); - else if (mode == SImode) - rclass = reduce_class (rclass, SI_REGS, rclass); - - if (rclass != A_REGS) - rclass = reduce_class (rclass, DI_REGS, rclass); - -#if DEBUG_RELOAD - fprintf (stderr, " %s\n", class_names[rclass]); -#endif - return rclass; -} - -/* Implements SECONDARY_RELOAD_CLASS. QImode have to be reloaded in - r0 or r1, as those are the only real QImode registers. CR regs get - reloaded through appropriately sized general or address - registers. */ -int -m32c_secondary_reload_class (int rclass, enum machine_mode mode, rtx x) -{ - int cc = class_contents[rclass][0]; -#if DEBUG0 - fprintf (stderr, "\nsecondary reload class %s %s\n", - class_names[rclass], mode_name[mode]); - debug_rtx (x); -#endif - if (mode == QImode - && GET_CODE (x) == MEM && (cc & ~class_contents[R23_REGS][0]) == 0) - return QI_REGS; - if (reg_classes_intersect_p (rclass, CR_REGS) - && GET_CODE (x) == REG - && REGNO (x) >= SB_REGNO && REGNO (x) <= SP_REGNO) - return TARGET_A16 ? HI_REGS : A_REGS; - return NO_REGS; -} - -/* Implements TARGET_CLASS_LIKELY_SPILLED_P. A_REGS is needed for address - reloads. */ - -#undef TARGET_CLASS_LIKELY_SPILLED_P -#define TARGET_CLASS_LIKELY_SPILLED_P m32c_class_likely_spilled_p - -static bool -m32c_class_likely_spilled_p (reg_class_t regclass) -{ - if (regclass == A_REGS) - return true; - - return (reg_class_size[(int) regclass] == 1); -} - -/* Implements CLASS_MAX_NREGS. We calculate this according to its - documented meaning, to avoid potential inconsistencies with actual - class definitions. */ -int -m32c_class_max_nregs (int regclass, enum machine_mode mode) -{ - int rn, max = 0; - - for (rn = 0; rn < FIRST_PSEUDO_REGISTER; rn++) - if (class_contents[regclass][0] & (1 << rn)) - { - int n = m32c_hard_regno_nregs (rn, mode); - if (max < n) - max = n; - } - return max; -} - -/* Implements CANNOT_CHANGE_MODE_CLASS. Only r0 and r1 can change to - QI (r0l, r1l) because the chip doesn't support QI ops on other - registers (well, it does on a0/a1 but if we let gcc do that, reload - suffers). Otherwise, we allow changes to larger modes. */ -int -m32c_cannot_change_mode_class (enum machine_mode from, - enum machine_mode to, int rclass) -{ - int rn; -#if DEBUG0 - fprintf (stderr, "cannot change from %s to %s in %s\n", - mode_name[from], mode_name[to], class_names[rclass]); -#endif - - /* If the larger mode isn't allowed in any of these registers, we - can't allow the change. */ - for (rn = 0; rn < FIRST_PSEUDO_REGISTER; rn++) - if (class_contents[rclass][0] & (1 << rn)) - if (! m32c_hard_regno_ok (rn, to)) - return 1; - - if (to == QImode) - return (class_contents[rclass][0] & 0x1ffa); - - if (class_contents[rclass][0] & 0x0005 /* r0, r1 */ - && GET_MODE_SIZE (from) > 1) - return 0; - if (GET_MODE_SIZE (from) > 2) /* all other regs */ - return 0; - - return 1; -} - -/* Helpers for the rest of the file. */ -/* TRUE if the rtx is a REG rtx for the given register. */ -#define IS_REG(rtx,regno) (GET_CODE (rtx) == REG \ - && REGNO (rtx) == regno) -/* TRUE if the rtx is a pseudo - specifically, one we can use as a - base register in address calculations (hence the "strict" - argument). */ -#define IS_PSEUDO(rtx,strict) (!strict && GET_CODE (rtx) == REG \ - && (REGNO (rtx) == AP_REGNO \ - || REGNO (rtx) >= FIRST_PSEUDO_REGISTER)) - -/* Implements CONST_OK_FOR_CONSTRAINT_P. Currently, all constant - constraints start with 'I', with the next two characters indicating - the type and size of the range allowed. */ -int -m32c_const_ok_for_constraint_p (HOST_WIDE_INT value, - char c ATTRIBUTE_UNUSED, const char *str) -{ - /* s=signed u=unsigned n=nonzero m=minus l=log2able, - [sun] bits [SUN] bytes, p=pointer size - I[-0-9][0-9] matches that number */ - if (memcmp (str, "Is3", 3) == 0) - { - return (-8 <= value && value <= 7); - } - if (memcmp (str, "IS1", 3) == 0) - { - return (-128 <= value && value <= 127); - } - if (memcmp (str, "IS2", 3) == 0) - { - return (-32768 <= value && value <= 32767); - } - if (memcmp (str, "IU2", 3) == 0) - { - return (0 <= value && value <= 65535); - } - if (memcmp (str, "IU3", 3) == 0) - { - return (0 <= value && value <= 0x00ffffff); - } - if (memcmp (str, "In4", 3) == 0) - { - return (-8 <= value && value && value <= 8); - } - if (memcmp (str, "In5", 3) == 0) - { - return (-16 <= value && value && value <= 16); - } - if (memcmp (str, "In6", 3) == 0) - { - return (-32 <= value && value && value <= 32); - } - if (memcmp (str, "IM2", 3) == 0) - { - return (-65536 <= value && value && value <= -1); - } - if (memcmp (str, "Ilb", 3) == 0) - { - int b = exact_log2 (value); - return (b >= 0 && b <= 7); - } - if (memcmp (str, "Imb", 3) == 0) - { - int b = exact_log2 ((value ^ 0xff) & 0xff); - return (b >= 0 && b <= 7); - } - if (memcmp (str, "ImB", 3) == 0) - { - int b = exact_log2 ((value ^ 0xffff) & 0xffff); - return (b >= 0 && b <= 7); - } - if (memcmp (str, "Ilw", 3) == 0) - { - int b = exact_log2 (value); - return (b >= 0 && b <= 15); - } - if (memcmp (str, "Imw", 3) == 0) - { - int b = exact_log2 ((value ^ 0xffff) & 0xffff); - return (b >= 0 && b <= 15); - } - if (memcmp (str, "I00", 3) == 0) - { - return (value == 0); - } - return 0; -} - -#define A0_OR_PSEUDO(x) (IS_REG(x, A0_REGNO) || REGNO (x) >= FIRST_PSEUDO_REGISTER) - -/* Implements EXTRA_CONSTRAINT_STR (see next function too). 'S' is - for memory constraints, plus "Rpa" for PARALLEL rtx's we use for - call return values. */ -int -m32c_extra_constraint_p2 (rtx value, char c ATTRIBUTE_UNUSED, const char *str) -{ - encode_pattern (value); - - if (far_addr_space_p (value)) - { - if (memcmp (str, "SF", 2) == 0) - { - return ( (RTX_IS ("mr") - && A0_OR_PSEUDO (patternr[1]) - && GET_MODE (patternr[1]) == SImode) - || (RTX_IS ("m+^Sri") - && A0_OR_PSEUDO (patternr[4]) - && GET_MODE (patternr[4]) == HImode) - || (RTX_IS ("m+^Srs") - && A0_OR_PSEUDO (patternr[4]) - && GET_MODE (patternr[4]) == HImode) - || (RTX_IS ("m+^S+ris") - && A0_OR_PSEUDO (patternr[5]) - && GET_MODE (patternr[5]) == HImode) - || RTX_IS ("ms") - ); - } - return 0; - } - - if (memcmp (str, "Sd", 2) == 0) - { - /* This is the common "src/dest" address */ - rtx r; - if (GET_CODE (value) == MEM && CONSTANT_P (XEXP (value, 0))) - return 1; - if (RTX_IS ("ms") || RTX_IS ("m+si")) - return 1; - if (RTX_IS ("m++rii")) - { - if (REGNO (patternr[3]) == FB_REGNO - && INTVAL (patternr[4]) == 0) - return 1; - } - if (RTX_IS ("mr")) - r = patternr[1]; - else if (RTX_IS ("m+ri") || RTX_IS ("m+rs") || RTX_IS ("m+r+si")) - r = patternr[2]; - else - return 0; - if (REGNO (r) == SP_REGNO) - return 0; - return m32c_legitimate_address_p (GET_MODE (value), XEXP (value, 0), 1); - } - else if (memcmp (str, "Sa", 2) == 0) - { - rtx r; - if (RTX_IS ("mr")) - r = patternr[1]; - else if (RTX_IS ("m+ri")) - r = patternr[2]; - else - return 0; - return (IS_REG (r, A0_REGNO) || IS_REG (r, A1_REGNO)); - } - else if (memcmp (str, "Si", 2) == 0) - { - return (RTX_IS ("mi") || RTX_IS ("ms") || RTX_IS ("m+si")); - } - else if (memcmp (str, "Ss", 2) == 0) - { - return ((RTX_IS ("mr") - && (IS_REG (patternr[1], SP_REGNO))) - || (RTX_IS ("m+ri") && (IS_REG (patternr[2], SP_REGNO)))); - } - else if (memcmp (str, "Sf", 2) == 0) - { - return ((RTX_IS ("mr") - && (IS_REG (patternr[1], FB_REGNO))) - || (RTX_IS ("m+ri") && (IS_REG (patternr[2], FB_REGNO)))); - } - else if (memcmp (str, "Sb", 2) == 0) - { - return ((RTX_IS ("mr") - && (IS_REG (patternr[1], SB_REGNO))) - || (RTX_IS ("m+ri") && (IS_REG (patternr[2], SB_REGNO)))); - } - else if (memcmp (str, "Sp", 2) == 0) - { - /* Absolute addresses 0..0x1fff used for bit addressing (I/O ports) */ - return (RTX_IS ("mi") - && !(INTVAL (patternr[1]) & ~0x1fff)); - } - else if (memcmp (str, "S1", 2) == 0) - { - return r1h_operand (value, QImode); - } - else if (memcmp (str, "SF", 2) == 0) - { - return 0; - } - - gcc_assert (str[0] != 'S'); - - if (memcmp (str, "Rpa", 2) == 0) - return GET_CODE (value) == PARALLEL; - - return 0; -} - -/* This is for when we're debugging the above. */ -int -m32c_extra_constraint_p (rtx value, char c, const char *str) -{ - int rv = m32c_extra_constraint_p2 (value, c, str); -#if DEBUG0 - fprintf (stderr, "\nconstraint %.*s: %d\n", CONSTRAINT_LEN (c, str), str, - rv); - debug_rtx (value); -#endif - return rv; -} - -/* Implements EXTRA_MEMORY_CONSTRAINT. Currently, we only use strings - starting with 'S'. */ -int -m32c_extra_memory_constraint (char c, const char *str ATTRIBUTE_UNUSED) -{ - return c == 'S'; -} - -/* Implements EXTRA_ADDRESS_CONSTRAINT. We reserve 'A' strings for these, - but don't currently define any. */ -int -m32c_extra_address_constraint (char c, const char *str ATTRIBUTE_UNUSED) -{ - return c == 'A'; -} - -/* STACK AND CALLING */ - -/* Frame Layout */ - -/* Implements RETURN_ADDR_RTX. Note that R8C and M16C push 24 bits - (yes, THREE bytes) onto the stack for the return address, but we - don't support pointers bigger than 16 bits on those chips. This - will likely wreak havoc with exception unwinding. FIXME. */ -rtx -m32c_return_addr_rtx (int count) -{ - enum machine_mode mode; - int offset; - rtx ra_mem; - - if (count) - return NULL_RTX; - /* we want 2[$fb] */ - - if (TARGET_A24) - { - /* It's four bytes */ - mode = PSImode; - offset = 4; - } - else - { - /* FIXME: it's really 3 bytes */ - mode = HImode; - offset = 2; - } - - ra_mem = - gen_rtx_MEM (mode, plus_constant (gen_rtx_REG (Pmode, FP_REGNO), offset)); - return copy_to_mode_reg (mode, ra_mem); -} - -/* Implements INCOMING_RETURN_ADDR_RTX. See comment above. */ -rtx -m32c_incoming_return_addr_rtx (void) -{ - /* we want [sp] */ - return gen_rtx_MEM (PSImode, gen_rtx_REG (PSImode, SP_REGNO)); -} - -/* Exception Handling Support */ - -/* Implements EH_RETURN_DATA_REGNO. Choose registers able to hold - pointers. */ -int -m32c_eh_return_data_regno (int n) -{ - switch (n) - { - case 0: - return A0_REGNO; - case 1: - if (TARGET_A16) - return R3_REGNO; - else - return R1_REGNO; - default: - return INVALID_REGNUM; - } -} - -/* Implements EH_RETURN_STACKADJ_RTX. Saved and used later in - m32c_emit_eh_epilogue. */ -rtx -m32c_eh_return_stackadj_rtx (void) -{ - if (!cfun->machine->eh_stack_adjust) - { - rtx sa; - - sa = gen_rtx_REG (Pmode, R0_REGNO); - cfun->machine->eh_stack_adjust = sa; - } - return cfun->machine->eh_stack_adjust; -} - -/* Registers That Address the Stack Frame */ - -/* Implements DWARF_FRAME_REGNUM and DBX_REGISTER_NUMBER. Note that - the original spec called for dwarf numbers to vary with register - width as well, for example, r0l, r0, and r2r0 would each have - different dwarf numbers. GCC doesn't support this, and we don't do - it, and gdb seems to like it this way anyway. */ -unsigned int -m32c_dwarf_frame_regnum (int n) -{ - switch (n) - { - case R0_REGNO: - return 5; - case R1_REGNO: - return 6; - case R2_REGNO: - return 7; - case R3_REGNO: - return 8; - case A0_REGNO: - return 9; - case A1_REGNO: - return 10; - case FB_REGNO: - return 11; - case SB_REGNO: - return 19; - - case SP_REGNO: - return 12; - case PC_REGNO: - return 13; - default: - return DWARF_FRAME_REGISTERS + 1; - } -} - -/* The frame looks like this: - - ap -> +------------------------------ - | Return address (3 or 4 bytes) - | Saved FB (2 or 4 bytes) - fb -> +------------------------------ - | local vars - | register saves fb - | through r0 as needed - sp -> +------------------------------ -*/ - -/* We use this to wrap all emitted insns in the prologue. */ -static rtx -F (rtx x) -{ - RTX_FRAME_RELATED_P (x) = 1; - return x; -} - -/* This maps register numbers to the PUSHM/POPM bitfield, and tells us - how much the stack pointer moves for each, for each cpu family. */ -static struct -{ - int reg1; - int bit; - int a16_bytes; - int a24_bytes; -} pushm_info[] = -{ - /* These are in reverse push (nearest-to-sp) order. */ - { R0_REGNO, 0x80, 2, 2 }, - { R1_REGNO, 0x40, 2, 2 }, - { R2_REGNO, 0x20, 2, 2 }, - { R3_REGNO, 0x10, 2, 2 }, - { A0_REGNO, 0x08, 2, 4 }, - { A1_REGNO, 0x04, 2, 4 }, - { SB_REGNO, 0x02, 2, 4 }, - { FB_REGNO, 0x01, 2, 4 } -}; - -#define PUSHM_N (sizeof(pushm_info)/sizeof(pushm_info[0])) - -/* Returns TRUE if we need to save/restore the given register. We - save everything for exception handlers, so that any register can be - unwound. For interrupt handlers, we save everything if the handler - calls something else (because we don't know what *that* function - might do), but try to be a bit smarter if the handler is a leaf - function. We always save $a0, though, because we use that in the - epilogue to copy $fb to $sp. */ -static int -need_to_save (int regno) -{ - if (fixed_regs[regno]) - return 0; - if (crtl->calls_eh_return) - return 1; - if (regno == FP_REGNO) - return 0; - if (cfun->machine->is_interrupt - && (!cfun->machine->is_leaf - || (regno == A0_REGNO - && m32c_function_needs_enter ()) - )) - return 1; - if (df_regs_ever_live_p (regno) - && (!call_used_regs[regno] || cfun->machine->is_interrupt)) - return 1; - return 0; -} - -/* This function contains all the intelligence about saving and - restoring registers. It always figures out the register save set. - When called with PP_justcount, it merely returns the size of the - save set (for eliminating the frame pointer, for example). When - called with PP_pushm or PP_popm, it emits the appropriate - instructions for saving (pushm) or restoring (popm) the - registers. */ -static int -m32c_pushm_popm (Push_Pop_Type ppt) -{ - int reg_mask = 0; - int byte_count = 0, bytes; - int i; - rtx dwarf_set[PUSHM_N]; - int n_dwarfs = 0; - int nosave_mask = 0; - - if (crtl->return_rtx - && GET_CODE (crtl->return_rtx) == PARALLEL - && !(crtl->calls_eh_return || cfun->machine->is_interrupt)) - { - rtx exp = XVECEXP (crtl->return_rtx, 0, 0); - rtx rv = XEXP (exp, 0); - int rv_bytes = GET_MODE_SIZE (GET_MODE (rv)); - - if (rv_bytes > 2) - nosave_mask |= 0x20; /* PSI, SI */ - else - nosave_mask |= 0xf0; /* DF */ - if (rv_bytes > 4) - nosave_mask |= 0x50; /* DI */ - } - - for (i = 0; i < (int) PUSHM_N; i++) - { - /* Skip if neither register needs saving. */ - if (!need_to_save (pushm_info[i].reg1)) - continue; - - if (pushm_info[i].bit & nosave_mask) - continue; - - reg_mask |= pushm_info[i].bit; - bytes = TARGET_A16 ? pushm_info[i].a16_bytes : pushm_info[i].a24_bytes; - - if (ppt == PP_pushm) - { - enum machine_mode mode = (bytes == 2) ? HImode : SImode; - rtx addr; - - /* Always use stack_pointer_rtx instead of calling - rtx_gen_REG ourselves. Code elsewhere in GCC assumes - that there is a single rtx representing the stack pointer, - namely stack_pointer_rtx, and uses == to recognize it. */ - addr = stack_pointer_rtx; - - if (byte_count != 0) - addr = gen_rtx_PLUS (GET_MODE (addr), addr, GEN_INT (byte_count)); - - dwarf_set[n_dwarfs++] = - gen_rtx_SET (VOIDmode, - gen_rtx_MEM (mode, addr), - gen_rtx_REG (mode, pushm_info[i].reg1)); - F (dwarf_set[n_dwarfs - 1]); - - } - byte_count += bytes; - } - - if (cfun->machine->is_interrupt) - { - cfun->machine->intr_pushm = reg_mask & 0xfe; - reg_mask = 0; - byte_count = 0; - } - - if (cfun->machine->is_interrupt) - for (i = MEM0_REGNO; i <= MEM7_REGNO; i++) - if (need_to_save (i)) - { - byte_count += 2; - cfun->machine->intr_pushmem[i - MEM0_REGNO] = 1; - } - - if (ppt == PP_pushm && byte_count) - { - rtx note = gen_rtx_SEQUENCE (VOIDmode, rtvec_alloc (n_dwarfs + 1)); - rtx pushm; - - if (reg_mask) - { - XVECEXP (note, 0, 0) - = gen_rtx_SET (VOIDmode, - stack_pointer_rtx, - gen_rtx_PLUS (GET_MODE (stack_pointer_rtx), - stack_pointer_rtx, - GEN_INT (-byte_count))); - F (XVECEXP (note, 0, 0)); - - for (i = 0; i < n_dwarfs; i++) - XVECEXP (note, 0, i + 1) = dwarf_set[i]; - - pushm = F (emit_insn (gen_pushm (GEN_INT (reg_mask)))); - - add_reg_note (pushm, REG_FRAME_RELATED_EXPR, note); - } - - if (cfun->machine->is_interrupt) - for (i = MEM0_REGNO; i <= MEM7_REGNO; i++) - if (cfun->machine->intr_pushmem[i - MEM0_REGNO]) - { - if (TARGET_A16) - pushm = emit_insn (gen_pushhi_16 (gen_rtx_REG (HImode, i))); - else - pushm = emit_insn (gen_pushhi_24 (gen_rtx_REG (HImode, i))); - F (pushm); - } - } - if (ppt == PP_popm && byte_count) - { - if (cfun->machine->is_interrupt) - for (i = MEM7_REGNO; i >= MEM0_REGNO; i--) - if (cfun->machine->intr_pushmem[i - MEM0_REGNO]) - { - if (TARGET_A16) - emit_insn (gen_pophi_16 (gen_rtx_REG (HImode, i))); - else - emit_insn (gen_pophi_24 (gen_rtx_REG (HImode, i))); - } - if (reg_mask) - emit_insn (gen_popm (GEN_INT (reg_mask))); - } - - return byte_count; -} - -/* Implements INITIAL_ELIMINATION_OFFSET. See the comment above that - diagrams our call frame. */ -int -m32c_initial_elimination_offset (int from, int to) -{ - int ofs = 0; - - if (from == AP_REGNO) - { - if (TARGET_A16) - ofs += 5; - else - ofs += 8; - } - - if (to == SP_REGNO) - { - ofs += m32c_pushm_popm (PP_justcount); - ofs += get_frame_size (); - } - - /* Account for push rounding. */ - if (TARGET_A24) - ofs = (ofs + 1) & ~1; -#if DEBUG0 - fprintf (stderr, "initial_elimination_offset from=%d to=%d, ofs=%d\n", from, - to, ofs); -#endif - return ofs; -} - -/* Passing Function Arguments on the Stack */ - -/* Implements PUSH_ROUNDING. The R8C and M16C have byte stacks, the - M32C has word stacks. */ -unsigned int -m32c_push_rounding (int n) -{ - if (TARGET_R8C || TARGET_M16C) - return n; - return (n + 1) & ~1; -} - -/* Passing Arguments in Registers */ - -/* Implements TARGET_FUNCTION_ARG. Arguments are passed partly in - registers, partly on stack. If our function returns a struct, a - pointer to a buffer for it is at the top of the stack (last thing - pushed). The first few real arguments may be in registers as - follows: - - R8C/M16C: arg1 in r1 if it's QI or HI (else it's pushed on stack) - arg2 in r2 if it's HI (else pushed on stack) - rest on stack - M32C: arg1 in r0 if it's QI or HI (else it's pushed on stack) - rest on stack - - Structs are not passed in registers, even if they fit. Only - integer and pointer types are passed in registers. - - Note that when arg1 doesn't fit in r1, arg2 may still be passed in - r2 if it fits. */ -#undef TARGET_FUNCTION_ARG -#define TARGET_FUNCTION_ARG m32c_function_arg -static rtx -m32c_function_arg (CUMULATIVE_ARGS * ca, - enum machine_mode mode, const_tree type, bool named) -{ - /* Can return a reg, parallel, or 0 for stack */ - rtx rv = NULL_RTX; -#if DEBUG0 - fprintf (stderr, "func_arg %d (%s, %d)\n", - ca->parm_num, mode_name[mode], named); - debug_tree (type); -#endif - - if (mode == VOIDmode) - return GEN_INT (0); - - if (ca->force_mem || !named) - { -#if DEBUG0 - fprintf (stderr, "func arg: force %d named %d, mem\n", ca->force_mem, - named); -#endif - return NULL_RTX; - } - - if (type && INTEGRAL_TYPE_P (type) && POINTER_TYPE_P (type)) - return NULL_RTX; - - if (type && AGGREGATE_TYPE_P (type)) - return NULL_RTX; - - switch (ca->parm_num) - { - case 1: - if (GET_MODE_SIZE (mode) == 1 || GET_MODE_SIZE (mode) == 2) - rv = gen_rtx_REG (mode, TARGET_A16 ? R1_REGNO : R0_REGNO); - break; - - case 2: - if (TARGET_A16 && GET_MODE_SIZE (mode) == 2) - rv = gen_rtx_REG (mode, R2_REGNO); - break; - } - -#if DEBUG0 - debug_rtx (rv); -#endif - return rv; -} - -#undef TARGET_PASS_BY_REFERENCE -#define TARGET_PASS_BY_REFERENCE m32c_pass_by_reference -static bool -m32c_pass_by_reference (CUMULATIVE_ARGS * ca ATTRIBUTE_UNUSED, - enum machine_mode mode ATTRIBUTE_UNUSED, - const_tree type ATTRIBUTE_UNUSED, - bool named ATTRIBUTE_UNUSED) -{ - return 0; -} - -/* Implements INIT_CUMULATIVE_ARGS. */ -void -m32c_init_cumulative_args (CUMULATIVE_ARGS * ca, - tree fntype, - rtx libname ATTRIBUTE_UNUSED, - tree fndecl, - int n_named_args ATTRIBUTE_UNUSED) -{ - if (fntype && aggregate_value_p (TREE_TYPE (fntype), fndecl)) - ca->force_mem = 1; - else - ca->force_mem = 0; - ca->parm_num = 1; -} - -/* Implements TARGET_FUNCTION_ARG_ADVANCE. force_mem is set for - functions returning structures, so we always reset that. Otherwise, - we only need to know the sequence number of the argument to know what - to do with it. */ -#undef TARGET_FUNCTION_ARG_ADVANCE -#define TARGET_FUNCTION_ARG_ADVANCE m32c_function_arg_advance -static void -m32c_function_arg_advance (CUMULATIVE_ARGS * ca, - enum machine_mode mode ATTRIBUTE_UNUSED, - const_tree type ATTRIBUTE_UNUSED, - bool named ATTRIBUTE_UNUSED) -{ - if (ca->force_mem) - ca->force_mem = 0; - else - ca->parm_num++; -} - -/* Implements TARGET_FUNCTION_ARG_BOUNDARY. */ -#undef TARGET_FUNCTION_ARG_BOUNDARY -#define TARGET_FUNCTION_ARG_BOUNDARY m32c_function_arg_boundary -static unsigned int -m32c_function_arg_boundary (enum machine_mode mode ATTRIBUTE_UNUSED, - const_tree type ATTRIBUTE_UNUSED) -{ - return (TARGET_A16 ? 8 : 16); -} - -/* Implements FUNCTION_ARG_REGNO_P. */ -int -m32c_function_arg_regno_p (int r) -{ - if (TARGET_A24) - return (r == R0_REGNO); - return (r == R1_REGNO || r == R2_REGNO); -} - -/* HImode and PSImode are the two "native" modes as far as GCC is - concerned, but the chips also support a 32-bit mode which is used - for some opcodes in R8C/M16C and for reset vectors and such. */ -#undef TARGET_VALID_POINTER_MODE -#define TARGET_VALID_POINTER_MODE m32c_valid_pointer_mode -static bool -m32c_valid_pointer_mode (enum machine_mode mode) -{ - if (mode == HImode - || mode == PSImode - || mode == SImode - ) - return 1; - return 0; -} - -/* How Scalar Function Values Are Returned */ - -/* Implements TARGET_LIBCALL_VALUE. Most values are returned in $r0, or some - combination of registers starting there (r2r0 for longs, r3r1r2r0 - for long long, r3r2r1r0 for doubles), except that that ABI - currently doesn't work because it ends up using all available - general registers and gcc often can't compile it. So, instead, we - return anything bigger than 16 bits in "mem0" (effectively, a - memory location). */ - -#undef TARGET_LIBCALL_VALUE -#define TARGET_LIBCALL_VALUE m32c_libcall_value - -static rtx -m32c_libcall_value (enum machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) -{ - /* return reg or parallel */ -#if 0 - /* FIXME: GCC has difficulty returning large values in registers, - because that ties up most of the general registers and gives the - register allocator little to work with. Until we can resolve - this, large values are returned in memory. */ - if (mode == DFmode) - { - rtx rv; - - rv = gen_rtx_PARALLEL (mode, rtvec_alloc (4)); - XVECEXP (rv, 0, 0) = gen_rtx_EXPR_LIST (VOIDmode, - gen_rtx_REG (HImode, - R0_REGNO), - GEN_INT (0)); - XVECEXP (rv, 0, 1) = gen_rtx_EXPR_LIST (VOIDmode, - gen_rtx_REG (HImode, - R1_REGNO), - GEN_INT (2)); - XVECEXP (rv, 0, 2) = gen_rtx_EXPR_LIST (VOIDmode, - gen_rtx_REG (HImode, - R2_REGNO), - GEN_INT (4)); - XVECEXP (rv, 0, 3) = gen_rtx_EXPR_LIST (VOIDmode, - gen_rtx_REG (HImode, - R3_REGNO), - GEN_INT (6)); - return rv; - } - - if (TARGET_A24 && GET_MODE_SIZE (mode) > 2) - { - rtx rv; - - rv = gen_rtx_PARALLEL (mode, rtvec_alloc (1)); - XVECEXP (rv, 0, 0) = gen_rtx_EXPR_LIST (VOIDmode, - gen_rtx_REG (mode, - R0_REGNO), - GEN_INT (0)); - return rv; - } -#endif - - if (GET_MODE_SIZE (mode) > 2) - return gen_rtx_REG (mode, MEM0_REGNO); - return gen_rtx_REG (mode, R0_REGNO); -} - -/* Implements TARGET_FUNCTION_VALUE. Functions and libcalls have the same - conventions. */ - -#undef TARGET_FUNCTION_VALUE -#define TARGET_FUNCTION_VALUE m32c_function_value - -static rtx -m32c_function_value (const_tree valtype, - const_tree fn_decl_or_type ATTRIBUTE_UNUSED, - bool outgoing ATTRIBUTE_UNUSED) -{ - /* return reg or parallel */ - const enum machine_mode mode = TYPE_MODE (valtype); - return m32c_libcall_value (mode, NULL_RTX); -} - -/* Implements TARGET_FUNCTION_VALUE_REGNO_P. */ - -#undef TARGET_FUNCTION_VALUE_REGNO_P -#define TARGET_FUNCTION_VALUE_REGNO_P m32c_function_value_regno_p - -static bool -m32c_function_value_regno_p (const unsigned int regno) -{ - return (regno == R0_REGNO || regno == MEM0_REGNO); -} - -/* How Large Values Are Returned */ - -/* We return structures by pushing the address on the stack, even if - we use registers for the first few "real" arguments. */ -#undef TARGET_STRUCT_VALUE_RTX -#define TARGET_STRUCT_VALUE_RTX m32c_struct_value_rtx -static rtx -m32c_struct_value_rtx (tree fndecl ATTRIBUTE_UNUSED, - int incoming ATTRIBUTE_UNUSED) -{ - return 0; -} - -/* Function Entry and Exit */ - -/* Implements EPILOGUE_USES. Interrupts restore all registers. */ -int -m32c_epilogue_uses (int regno ATTRIBUTE_UNUSED) -{ - if (cfun->machine->is_interrupt) - return 1; - return 0; -} - -/* Implementing the Varargs Macros */ - -#undef TARGET_STRICT_ARGUMENT_NAMING -#define TARGET_STRICT_ARGUMENT_NAMING m32c_strict_argument_naming -static bool -m32c_strict_argument_naming (CUMULATIVE_ARGS * ca ATTRIBUTE_UNUSED) -{ - return 1; -} - -/* Trampolines for Nested Functions */ - -/* - m16c: - 1 0000 75C43412 mov.w #0x1234,a0 - 2 0004 FC000000 jmp.a label - - m32c: - 1 0000 BC563412 mov.l:s #0x123456,a0 - 2 0004 CC000000 jmp.a label -*/ - -/* Implements TRAMPOLINE_SIZE. */ -int -m32c_trampoline_size (void) -{ - /* Allocate extra space so we can avoid the messy shifts when we - initialize the trampoline; we just write past the end of the - opcode. */ - return TARGET_A16 ? 8 : 10; -} - -/* Implements TRAMPOLINE_ALIGNMENT. */ -int -m32c_trampoline_alignment (void) -{ - return 2; -} - -/* Implements TARGET_TRAMPOLINE_INIT. */ - -#undef TARGET_TRAMPOLINE_INIT -#define TARGET_TRAMPOLINE_INIT m32c_trampoline_init -static void -m32c_trampoline_init (rtx m_tramp, tree fndecl, rtx chainval) -{ - rtx function = XEXP (DECL_RTL (fndecl), 0); - -#define A0(m,i) adjust_address (m_tramp, m, i) - if (TARGET_A16) - { - /* Note: we subtract a "word" because the moves want signed - constants, not unsigned constants. */ - emit_move_insn (A0 (HImode, 0), GEN_INT (0xc475 - 0x10000)); - emit_move_insn (A0 (HImode, 2), chainval); - emit_move_insn (A0 (QImode, 4), GEN_INT (0xfc - 0x100)); - /* We use 16-bit addresses here, but store the zero to turn it - into a 24-bit offset. */ - emit_move_insn (A0 (HImode, 5), function); - emit_move_insn (A0 (QImode, 7), GEN_INT (0x00)); - } - else - { - /* Note that the PSI moves actually write 4 bytes. Make sure we - write stuff out in the right order, and leave room for the - extra byte at the end. */ - emit_move_insn (A0 (QImode, 0), GEN_INT (0xbc - 0x100)); - emit_move_insn (A0 (PSImode, 1), chainval); - emit_move_insn (A0 (QImode, 4), GEN_INT (0xcc - 0x100)); - emit_move_insn (A0 (PSImode, 5), function); - } -#undef A0 -} - -/* Implicit Calls to Library Routines */ - -#undef TARGET_INIT_LIBFUNCS -#define TARGET_INIT_LIBFUNCS m32c_init_libfuncs -static void -m32c_init_libfuncs (void) -{ - /* We do this because the M32C has an HImode operand, but the - M16C has an 8-bit operand. Since gcc looks at the match data - and not the expanded rtl, we have to reset the optab so that - the right modes are found. */ - if (TARGET_A24) - { - set_optab_handler (cstore_optab, QImode, CODE_FOR_cstoreqi4_24); - set_optab_handler (cstore_optab, HImode, CODE_FOR_cstorehi4_24); - set_optab_handler (cstore_optab, PSImode, CODE_FOR_cstorepsi4_24); - } -} - -/* Addressing Modes */ - -/* The r8c/m32c family supports a wide range of non-orthogonal - addressing modes, including the ability to double-indirect on *some* - of them. Not all insns support all modes, either, but we rely on - predicates and constraints to deal with that. */ -#undef TARGET_LEGITIMATE_ADDRESS_P -#define TARGET_LEGITIMATE_ADDRESS_P m32c_legitimate_address_p -bool -m32c_legitimate_address_p (enum machine_mode mode, rtx x, bool strict) -{ - int mode_adjust; - if (CONSTANT_P (x)) - return 1; - - if (TARGET_A16 && GET_MODE (x) != HImode && GET_MODE (x) != SImode) - return 0; - if (TARGET_A24 && GET_MODE (x) != PSImode) - return 0; - - /* Wide references to memory will be split after reload, so we must - ensure that all parts of such splits remain legitimate - addresses. */ - mode_adjust = GET_MODE_SIZE (mode) - 1; - - /* allowing PLUS yields mem:HI(plus:SI(mem:SI(plus:SI in m32c_split_move */ - if (GET_CODE (x) == PRE_DEC - || GET_CODE (x) == POST_INC || GET_CODE (x) == PRE_MODIFY) - { - return (GET_CODE (XEXP (x, 0)) == REG - && REGNO (XEXP (x, 0)) == SP_REGNO); - } - -#if 0 - /* This is the double indirection detection, but it currently - doesn't work as cleanly as this code implies, so until we've had - a chance to debug it, leave it disabled. */ - if (TARGET_A24 && GET_CODE (x) == MEM && GET_CODE (XEXP (x, 0)) != PLUS) - { -#if DEBUG_DOUBLE - fprintf (stderr, "double indirect\n"); -#endif - x = XEXP (x, 0); - } -#endif - - encode_pattern (x); - if (RTX_IS ("r")) - { - /* Most indexable registers can be used without displacements, - although some of them will be emitted with an explicit zero - to please the assembler. */ - switch (REGNO (patternr[0])) - { - case A1_REGNO: - case SB_REGNO: - case FB_REGNO: - case SP_REGNO: - if (TARGET_A16 && GET_MODE (x) == SImode) - return 0; - case A0_REGNO: - return 1; - - default: - if (IS_PSEUDO (patternr[0], strict)) - return 1; - return 0; - } - } - - if (TARGET_A16 && GET_MODE (x) == SImode) - return 0; - - if (RTX_IS ("+ri")) - { - /* This is more interesting, because different base registers - allow for different displacements - both range and signedness - - and it differs from chip series to chip series too. */ - int rn = REGNO (patternr[1]); - HOST_WIDE_INT offs = INTVAL (patternr[2]); - switch (rn) - { - case A0_REGNO: - case A1_REGNO: - case SB_REGNO: - /* The syntax only allows positive offsets, but when the - offsets span the entire memory range, we can simulate - negative offsets by wrapping. */ - if (TARGET_A16) - return (offs >= -65536 && offs <= 65535 - mode_adjust); - if (rn == SB_REGNO) - return (offs >= 0 && offs <= 65535 - mode_adjust); - /* A0 or A1 */ - return (offs >= -16777216 && offs <= 16777215); - - case FB_REGNO: - if (TARGET_A16) - return (offs >= -128 && offs <= 127 - mode_adjust); - return (offs >= -65536 && offs <= 65535 - mode_adjust); - - case SP_REGNO: - return (offs >= -128 && offs <= 127 - mode_adjust); - - default: - if (IS_PSEUDO (patternr[1], strict)) - return 1; - return 0; - } - } - if (RTX_IS ("+rs") || RTX_IS ("+r+si")) - { - rtx reg = patternr[1]; - - /* We don't know where the symbol is, so only allow base - registers which support displacements spanning the whole - address range. */ - switch (REGNO (reg)) - { - case A0_REGNO: - case A1_REGNO: - /* $sb needs a secondary reload, but since it's involved in - memory address reloads too, we don't deal with it very - well. */ - /* case SB_REGNO: */ - return 1; - default: - if (IS_PSEUDO (reg, strict)) - return 1; - return 0; - } - } - return 0; -} - -/* Implements REG_OK_FOR_BASE_P. */ -int -m32c_reg_ok_for_base_p (rtx x, int strict) -{ - if (GET_CODE (x) != REG) - return 0; - switch (REGNO (x)) - { - case A0_REGNO: - case A1_REGNO: - case SB_REGNO: - case FB_REGNO: - case SP_REGNO: - return 1; - default: - if (IS_PSEUDO (x, strict)) - return 1; - return 0; - } -} - -/* We have three choices for choosing fb->aN offsets. If we choose -128, - we need one MOVA -128[fb],aN opcode and 16-bit aN displacements, - like this: - EB 4B FF mova -128[$fb],$a0 - D8 0C FF FF mov.w:Q #0,-1[$a0] - - Alternately, we subtract the frame size, and hopefully use 8-bit aN - displacements: - 7B F4 stc $fb,$a0 - 77 54 00 01 sub #256,$a0 - D8 08 01 mov.w:Q #0,1[$a0] - - If we don't offset (i.e. offset by zero), we end up with: - 7B F4 stc $fb,$a0 - D8 0C 00 FF mov.w:Q #0,-256[$a0] - - We have to subtract *something* so that we have a PLUS rtx to mark - that we've done this reload. The -128 offset will never result in - an 8-bit aN offset, and the payoff for the second case is five - loads *if* those loads are within 256 bytes of the other end of the - frame, so the third case seems best. Note that we subtract the - zero, but detect that in the addhi3 pattern. */ - -#define BIG_FB_ADJ 0 - -/* Implements LEGITIMIZE_ADDRESS. The only address we really have to - worry about is frame base offsets, as $fb has a limited - displacement range. We deal with this by attempting to reload $fb - itself into an address register; that seems to result in the best - code. */ -#undef TARGET_LEGITIMIZE_ADDRESS -#define TARGET_LEGITIMIZE_ADDRESS m32c_legitimize_address -static rtx -m32c_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED, - enum machine_mode mode) -{ -#if DEBUG0 - fprintf (stderr, "m32c_legitimize_address for mode %s\n", mode_name[mode]); - debug_rtx (x); - fprintf (stderr, "\n"); -#endif - - if (GET_CODE (x) == PLUS - && GET_CODE (XEXP (x, 0)) == REG - && REGNO (XEXP (x, 0)) == FB_REGNO - && GET_CODE (XEXP (x, 1)) == CONST_INT - && (INTVAL (XEXP (x, 1)) < -128 - || INTVAL (XEXP (x, 1)) > (128 - GET_MODE_SIZE (mode)))) - { - /* reload FB to A_REGS */ - rtx temp = gen_reg_rtx (Pmode); - x = copy_rtx (x); - emit_insn (gen_rtx_SET (VOIDmode, temp, XEXP (x, 0))); - XEXP (x, 0) = temp; - } - - return x; -} - -/* Implements LEGITIMIZE_RELOAD_ADDRESS. See comment above. */ -int -m32c_legitimize_reload_address (rtx * x, - enum machine_mode mode, - int opnum, - int type, int ind_levels ATTRIBUTE_UNUSED) -{ -#if DEBUG0 - fprintf (stderr, "\nm32c_legitimize_reload_address for mode %s\n", - mode_name[mode]); - debug_rtx (*x); -#endif - - /* At one point, this function tried to get $fb copied to an address - register, which in theory would maximize sharing, but gcc was - *also* still trying to reload the whole address, and we'd run out - of address registers. So we let gcc do the naive (but safe) - reload instead, when the above function doesn't handle it for - us. - - The code below is a second attempt at the above. */ - - if (GET_CODE (*x) == PLUS - && GET_CODE (XEXP (*x, 0)) == REG - && REGNO (XEXP (*x, 0)) == FB_REGNO - && GET_CODE (XEXP (*x, 1)) == CONST_INT - && (INTVAL (XEXP (*x, 1)) < -128 - || INTVAL (XEXP (*x, 1)) > (128 - GET_MODE_SIZE (mode)))) - { - rtx sum; - int offset = INTVAL (XEXP (*x, 1)); - int adjustment = -BIG_FB_ADJ; - - sum = gen_rtx_PLUS (Pmode, XEXP (*x, 0), - GEN_INT (adjustment)); - *x = gen_rtx_PLUS (Pmode, sum, GEN_INT (offset - adjustment)); - if (type == RELOAD_OTHER) - type = RELOAD_FOR_OTHER_ADDRESS; - push_reload (sum, NULL_RTX, &XEXP (*x, 0), NULL, - A_REGS, Pmode, VOIDmode, 0, 0, opnum, - (enum reload_type) type); - return 1; - } - - if (GET_CODE (*x) == PLUS - && GET_CODE (XEXP (*x, 0)) == PLUS - && GET_CODE (XEXP (XEXP (*x, 0), 0)) == REG - && REGNO (XEXP (XEXP (*x, 0), 0)) == FB_REGNO - && GET_CODE (XEXP (XEXP (*x, 0), 1)) == CONST_INT - && GET_CODE (XEXP (*x, 1)) == CONST_INT - ) - { - if (type == RELOAD_OTHER) - type = RELOAD_FOR_OTHER_ADDRESS; - push_reload (XEXP (*x, 0), NULL_RTX, &XEXP (*x, 0), NULL, - A_REGS, Pmode, VOIDmode, 0, 0, opnum, - (enum reload_type) type); - return 1; - } - - return 0; -} - -/* Implements LEGITIMATE_CONSTANT_P. We split large constants anyway, - so we can allow anything. */ -int -m32c_legitimate_constant_p (rtx x ATTRIBUTE_UNUSED) -{ - return 1; -} - - -/* Return the appropriate mode for a named address pointer. */ -#undef TARGET_ADDR_SPACE_POINTER_MODE -#define TARGET_ADDR_SPACE_POINTER_MODE m32c_addr_space_pointer_mode -static enum machine_mode -m32c_addr_space_pointer_mode (addr_space_t addrspace) -{ - switch (addrspace) - { - case ADDR_SPACE_GENERIC: - return TARGET_A24 ? PSImode : HImode; - case ADDR_SPACE_FAR: - return SImode; - default: - gcc_unreachable (); - } -} - -/* Return the appropriate mode for a named address address. */ -#undef TARGET_ADDR_SPACE_ADDRESS_MODE -#define TARGET_ADDR_SPACE_ADDRESS_MODE m32c_addr_space_address_mode -static enum machine_mode -m32c_addr_space_address_mode (addr_space_t addrspace) -{ - switch (addrspace) - { - case ADDR_SPACE_GENERIC: - return TARGET_A24 ? PSImode : HImode; - case ADDR_SPACE_FAR: - return SImode; - default: - gcc_unreachable (); - } -} - -/* Like m32c_legitimate_address_p, except with named addresses. */ -#undef TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P -#define TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P \ - m32c_addr_space_legitimate_address_p -static bool -m32c_addr_space_legitimate_address_p (enum machine_mode mode, rtx x, - bool strict, addr_space_t as) -{ - if (as == ADDR_SPACE_FAR) - { - if (TARGET_A24) - return 0; - encode_pattern (x); - if (RTX_IS ("r")) - { - if (GET_MODE (x) != SImode) - return 0; - switch (REGNO (patternr[0])) - { - case A0_REGNO: - return 1; - - default: - if (IS_PSEUDO (patternr[0], strict)) - return 1; - return 0; - } - } - if (RTX_IS ("+^Sri")) - { - int rn = REGNO (patternr[3]); - HOST_WIDE_INT offs = INTVAL (patternr[4]); - if (GET_MODE (patternr[3]) != HImode) - return 0; - switch (rn) - { - case A0_REGNO: - return (offs >= 0 && offs <= 0xfffff); - - default: - if (IS_PSEUDO (patternr[3], strict)) - return 1; - return 0; - } - } - if (RTX_IS ("+^Srs")) - { - int rn = REGNO (patternr[3]); - if (GET_MODE (patternr[3]) != HImode) - return 0; - switch (rn) - { - case A0_REGNO: - return 1; - - default: - if (IS_PSEUDO (patternr[3], strict)) - return 1; - return 0; - } - } - if (RTX_IS ("+^S+ris")) - { - int rn = REGNO (patternr[4]); - if (GET_MODE (patternr[4]) != HImode) - return 0; - switch (rn) - { - case A0_REGNO: - return 1; - - default: - if (IS_PSEUDO (patternr[4], strict)) - return 1; - return 0; - } - } - if (RTX_IS ("s")) - { - return 1; - } - return 0; - } - - else if (as != ADDR_SPACE_GENERIC) - gcc_unreachable (); - - return m32c_legitimate_address_p (mode, x, strict); -} - -/* Like m32c_legitimate_address, except with named address support. */ -#undef TARGET_ADDR_SPACE_LEGITIMIZE_ADDRESS -#define TARGET_ADDR_SPACE_LEGITIMIZE_ADDRESS m32c_addr_space_legitimize_address -static rtx -m32c_addr_space_legitimize_address (rtx x, rtx oldx, enum machine_mode mode, - addr_space_t as) -{ - if (as != ADDR_SPACE_GENERIC) - { -#if DEBUG0 - fprintf (stderr, "\033[36mm32c_addr_space_legitimize_address for mode %s\033[0m\n", mode_name[mode]); - debug_rtx (x); - fprintf (stderr, "\n"); -#endif - - if (GET_CODE (x) != REG) - { - x = force_reg (SImode, x); - } - return x; - } - - return m32c_legitimize_address (x, oldx, mode); -} - -/* Determine if one named address space is a subset of another. */ -#undef TARGET_ADDR_SPACE_SUBSET_P -#define TARGET_ADDR_SPACE_SUBSET_P m32c_addr_space_subset_p -static bool -m32c_addr_space_subset_p (addr_space_t subset, addr_space_t superset) -{ - gcc_assert (subset == ADDR_SPACE_GENERIC || subset == ADDR_SPACE_FAR); - gcc_assert (superset == ADDR_SPACE_GENERIC || superset == ADDR_SPACE_FAR); - - if (subset == superset) - return true; - - else - return (subset == ADDR_SPACE_GENERIC && superset == ADDR_SPACE_FAR); -} - -#undef TARGET_ADDR_SPACE_CONVERT -#define TARGET_ADDR_SPACE_CONVERT m32c_addr_space_convert -/* Convert from one address space to another. */ -static rtx -m32c_addr_space_convert (rtx op, tree from_type, tree to_type) -{ - addr_space_t from_as = TYPE_ADDR_SPACE (TREE_TYPE (from_type)); - addr_space_t to_as = TYPE_ADDR_SPACE (TREE_TYPE (to_type)); - rtx result; - - gcc_assert (from_as == ADDR_SPACE_GENERIC || from_as == ADDR_SPACE_FAR); - gcc_assert (to_as == ADDR_SPACE_GENERIC || to_as == ADDR_SPACE_FAR); - - if (to_as == ADDR_SPACE_GENERIC && from_as == ADDR_SPACE_FAR) - { - /* This is unpredictable, as we're truncating off usable address - bits. */ - - result = gen_reg_rtx (HImode); - emit_move_insn (result, simplify_subreg (HImode, op, SImode, 0)); - return result; - } - else if (to_as == ADDR_SPACE_FAR && from_as == ADDR_SPACE_GENERIC) - { - /* This always works. */ - result = gen_reg_rtx (SImode); - emit_insn (gen_zero_extendhisi2 (result, op)); - return result; - } - else - gcc_unreachable (); -} - -/* Condition Code Status */ - -#undef TARGET_FIXED_CONDITION_CODE_REGS -#define TARGET_FIXED_CONDITION_CODE_REGS m32c_fixed_condition_code_regs -static bool -m32c_fixed_condition_code_regs (unsigned int *p1, unsigned int *p2) -{ - *p1 = FLG_REGNO; - *p2 = INVALID_REGNUM; - return true; -} - -/* Describing Relative Costs of Operations */ - -/* Implements TARGET_REGISTER_MOVE_COST. We make impossible moves - prohibitively expensive, like trying to put QIs in r2/r3 (there are - no opcodes to do that). We also discourage use of mem* registers - since they're really memory. */ - -#undef TARGET_REGISTER_MOVE_COST -#define TARGET_REGISTER_MOVE_COST m32c_register_move_cost - -static int -m32c_register_move_cost (enum machine_mode mode, reg_class_t from, - reg_class_t to) -{ - int cost = COSTS_N_INSNS (3); - HARD_REG_SET cc; - -/* FIXME: pick real values, but not 2 for now. */ - COPY_HARD_REG_SET (cc, reg_class_contents[(int) from]); - IOR_HARD_REG_SET (cc, reg_class_contents[(int) to]); - - if (mode == QImode - && hard_reg_set_intersect_p (cc, reg_class_contents[R23_REGS])) - { - if (hard_reg_set_subset_p (cc, reg_class_contents[R23_REGS])) - cost = COSTS_N_INSNS (1000); - else - cost = COSTS_N_INSNS (80); - } - - if (!class_can_hold_mode (from, mode) || !class_can_hold_mode (to, mode)) - cost = COSTS_N_INSNS (1000); - - if (reg_classes_intersect_p (from, CR_REGS)) - cost += COSTS_N_INSNS (5); - - if (reg_classes_intersect_p (to, CR_REGS)) - cost += COSTS_N_INSNS (5); - - if (from == MEM_REGS || to == MEM_REGS) - cost += COSTS_N_INSNS (50); - else if (reg_classes_intersect_p (from, MEM_REGS) - || reg_classes_intersect_p (to, MEM_REGS)) - cost += COSTS_N_INSNS (10); - -#if DEBUG0 - fprintf (stderr, "register_move_cost %s from %s to %s = %d\n", - mode_name[mode], class_names[(int) from], class_names[(int) to], - cost); -#endif - return cost; -} - -/* Implements TARGET_MEMORY_MOVE_COST. */ - -#undef TARGET_MEMORY_MOVE_COST -#define TARGET_MEMORY_MOVE_COST m32c_memory_move_cost - -static int -m32c_memory_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, - reg_class_t rclass ATTRIBUTE_UNUSED, - bool in ATTRIBUTE_UNUSED) -{ - /* FIXME: pick real values. */ - return COSTS_N_INSNS (10); -} - -/* Here we try to describe when we use multiple opcodes for one RTX so - that gcc knows when to use them. */ -#undef TARGET_RTX_COSTS -#define TARGET_RTX_COSTS m32c_rtx_costs -static bool -m32c_rtx_costs (rtx x, int code, int outer_code, int *total, - bool speed ATTRIBUTE_UNUSED) -{ - switch (code) - { - case REG: - if (REGNO (x) >= MEM0_REGNO && REGNO (x) <= MEM7_REGNO) - *total += COSTS_N_INSNS (500); - else - *total += COSTS_N_INSNS (1); - return true; - - case ASHIFT: - case LSHIFTRT: - case ASHIFTRT: - if (GET_CODE (XEXP (x, 1)) != CONST_INT) - { - /* mov.b r1l, r1h */ - *total += COSTS_N_INSNS (1); - return true; - } - if (INTVAL (XEXP (x, 1)) > 8 - || INTVAL (XEXP (x, 1)) < -8) - { - /* mov.b #N, r1l */ - /* mov.b r1l, r1h */ - *total += COSTS_N_INSNS (2); - return true; - } - return true; - - case LE: - case LEU: - case LT: - case LTU: - case GT: - case GTU: - case GE: - case GEU: - case NE: - case EQ: - if (outer_code == SET) - { - *total += COSTS_N_INSNS (2); - return true; - } - break; - - case ZERO_EXTRACT: - { - rtx dest = XEXP (x, 0); - rtx addr = XEXP (dest, 0); - switch (GET_CODE (addr)) - { - case CONST_INT: - *total += COSTS_N_INSNS (1); - break; - case SYMBOL_REF: - *total += COSTS_N_INSNS (3); - break; - default: - *total += COSTS_N_INSNS (2); - break; - } - return true; - } - break; - - default: - /* Reasonable default. */ - if (TARGET_A16 && GET_MODE(x) == SImode) - *total += COSTS_N_INSNS (2); - break; - } - return false; -} - -#undef TARGET_ADDRESS_COST -#define TARGET_ADDRESS_COST m32c_address_cost -static int -m32c_address_cost (rtx addr, bool speed ATTRIBUTE_UNUSED) -{ - int i; - /* fprintf(stderr, "\naddress_cost\n"); - debug_rtx(addr);*/ - switch (GET_CODE (addr)) - { - case CONST_INT: - i = INTVAL (addr); - if (i == 0) - return COSTS_N_INSNS(1); - if (0 < i && i <= 255) - return COSTS_N_INSNS(2); - if (0 < i && i <= 65535) - return COSTS_N_INSNS(3); - return COSTS_N_INSNS(4); - case SYMBOL_REF: - return COSTS_N_INSNS(4); - case REG: - return COSTS_N_INSNS(1); - case PLUS: - if (GET_CODE (XEXP (addr, 1)) == CONST_INT) - { - i = INTVAL (XEXP (addr, 1)); - if (i == 0) - return COSTS_N_INSNS(1); - if (0 < i && i <= 255) - return COSTS_N_INSNS(2); - if (0 < i && i <= 65535) - return COSTS_N_INSNS(3); - } - return COSTS_N_INSNS(4); - default: - return 0; - } -} - -/* Defining the Output Assembler Language */ - -/* The Overall Framework of an Assembler File */ - -#undef TARGET_HAVE_NAMED_SECTIONS -#define TARGET_HAVE_NAMED_SECTIONS true - -/* Output of Data */ - -/* We may have 24 bit sizes, which is the native address size. - Currently unused, but provided for completeness. */ -#undef TARGET_ASM_INTEGER -#define TARGET_ASM_INTEGER m32c_asm_integer -static bool -m32c_asm_integer (rtx x, unsigned int size, int aligned_p) -{ - switch (size) - { - case 3: - fprintf (asm_out_file, "\t.3byte\t"); - output_addr_const (asm_out_file, x); - fputc ('\n', asm_out_file); - return true; - case 4: - if (GET_CODE (x) == SYMBOL_REF) - { - fprintf (asm_out_file, "\t.long\t"); - output_addr_const (asm_out_file, x); - fputc ('\n', asm_out_file); - return true; - } - break; - } - return default_assemble_integer (x, size, aligned_p); -} - -/* Output of Assembler Instructions */ - -/* We use a lookup table because the addressing modes are non-orthogonal. */ - -static struct -{ - char code; - char const *pattern; - char const *format; -} -const conversions[] = { - { 0, "r", "0" }, - - { 0, "mr", "z[1]" }, - { 0, "m+ri", "3[2]" }, - { 0, "m+rs", "3[2]" }, - { 0, "m+^Zrs", "5[4]" }, - { 0, "m+^Zri", "5[4]" }, - { 0, "m+^Z+ris", "7+6[5]" }, - { 0, "m+^Srs", "5[4]" }, - { 0, "m+^Sri", "5[4]" }, - { 0, "m+^S+ris", "7+6[5]" }, - { 0, "m+r+si", "4+5[2]" }, - { 0, "ms", "1" }, - { 0, "mi", "1" }, - { 0, "m+si", "2+3" }, - - { 0, "mmr", "[z[2]]" }, - { 0, "mm+ri", "[4[3]]" }, - { 0, "mm+rs", "[4[3]]" }, - { 0, "mm+r+si", "[5+6[3]]" }, - { 0, "mms", "[[2]]" }, - { 0, "mmi", "[[2]]" }, - { 0, "mm+si", "[4[3]]" }, - - { 0, "i", "#0" }, - { 0, "s", "#0" }, - { 0, "+si", "#1+2" }, - { 0, "l", "#0" }, - - { 'l', "l", "0" }, - { 'd', "i", "0" }, - { 'd', "s", "0" }, - { 'd', "+si", "1+2" }, - { 'D', "i", "0" }, - { 'D', "s", "0" }, - { 'D', "+si", "1+2" }, - { 'x', "i", "#0" }, - { 'X', "i", "#0" }, - { 'm', "i", "#0" }, - { 'b', "i", "#0" }, - { 'B', "i", "0" }, - { 'p', "i", "0" }, - - { 0, 0, 0 } -}; - -/* This is in order according to the bitfield that pushm/popm use. */ -static char const *pushm_regs[] = { - "fb", "sb", "a1", "a0", "r3", "r2", "r1", "r0" -}; - -/* Implements PRINT_OPERAND. */ -void -m32c_print_operand (FILE * file, rtx x, int code) -{ - int i, j, b; - const char *comma; - HOST_WIDE_INT ival; - int unsigned_const = 0; - int force_sign; - - /* Multiplies; constants are converted to sign-extended format but - we need unsigned, so 'u' and 'U' tell us what size unsigned we - need. */ - if (code == 'u') - { - unsigned_const = 2; - code = 0; - } - if (code == 'U') - { - unsigned_const = 1; - code = 0; - } - /* This one is only for debugging; you can put it in a pattern to - force this error. */ - if (code == '!') - { - fprintf (stderr, "dj: unreviewed pattern:"); - if (current_output_insn) - debug_rtx (current_output_insn); - gcc_unreachable (); - } - /* PSImode operations are either .w or .l depending on the target. */ - if (code == '&') - { - if (TARGET_A16) - fprintf (file, "w"); - else - fprintf (file, "l"); - return; - } - /* Inverted conditionals. */ - if (code == 'C') - { - switch (GET_CODE (x)) - { - case LE: - fputs ("gt", file); - break; - case LEU: - fputs ("gtu", file); - break; - case LT: - fputs ("ge", file); - break; - case LTU: - fputs ("geu", file); - break; - case GT: - fputs ("le", file); - break; - case GTU: - fputs ("leu", file); - break; - case GE: - fputs ("lt", file); - break; - case GEU: - fputs ("ltu", file); - break; - case NE: - fputs ("eq", file); - break; - case EQ: - fputs ("ne", file); - break; - default: - gcc_unreachable (); - } - return; - } - /* Regular conditionals. */ - if (code == 'c') - { - switch (GET_CODE (x)) - { - case LE: - fputs ("le", file); - break; - case LEU: - fputs ("leu", file); - break; - case LT: - fputs ("lt", file); - break; - case LTU: - fputs ("ltu", file); - break; - case GT: - fputs ("gt", file); - break; - case GTU: - fputs ("gtu", file); - break; - case GE: - fputs ("ge", file); - break; - case GEU: - fputs ("geu", file); - break; - case NE: - fputs ("ne", file); - break; - case EQ: - fputs ("eq", file); - break; - default: - gcc_unreachable (); - } - return; - } - /* Used in negsi2 to do HImode ops on the two parts of an SImode - operand. */ - if (code == 'h' && GET_MODE (x) == SImode) - { - x = m32c_subreg (HImode, x, SImode, 0); - code = 0; - } - if (code == 'H' && GET_MODE (x) == SImode) - { - x = m32c_subreg (HImode, x, SImode, 2); - code = 0; - } - if (code == 'h' && GET_MODE (x) == HImode) - { - x = m32c_subreg (QImode, x, HImode, 0); - code = 0; - } - if (code == 'H' && GET_MODE (x) == HImode) - { - /* We can't actually represent this as an rtx. Do it here. */ - if (GET_CODE (x) == REG) - { - switch (REGNO (x)) - { - case R0_REGNO: - fputs ("r0h", file); - return; - case R1_REGNO: - fputs ("r1h", file); - return; - default: - gcc_unreachable(); - } - } - /* This should be a MEM. */ - x = m32c_subreg (QImode, x, HImode, 1); - code = 0; - } - /* This is for BMcond, which always wants word register names. */ - if (code == 'h' && GET_MODE (x) == QImode) - { - if (GET_CODE (x) == REG) - x = gen_rtx_REG (HImode, REGNO (x)); - code = 0; - } - /* 'x' and 'X' need to be ignored for non-immediates. */ - if ((code == 'x' || code == 'X') && GET_CODE (x) != CONST_INT) - code = 0; - - encode_pattern (x); - force_sign = 0; - for (i = 0; conversions[i].pattern; i++) - if (conversions[i].code == code - && streq (conversions[i].pattern, pattern)) - { - for (j = 0; conversions[i].format[j]; j++) - /* backslash quotes the next character in the output pattern. */ - if (conversions[i].format[j] == '\\') - { - fputc (conversions[i].format[j + 1], file); - j++; - } - /* Digits in the output pattern indicate that the - corresponding RTX is to be output at that point. */ - else if (ISDIGIT (conversions[i].format[j])) - { - rtx r = patternr[conversions[i].format[j] - '0']; - switch (GET_CODE (r)) - { - case REG: - fprintf (file, "%s", - reg_name_with_mode (REGNO (r), GET_MODE (r))); - break; - case CONST_INT: - switch (code) - { - case 'b': - case 'B': - { - int v = INTVAL (r); - int i = (int) exact_log2 (v); - if (i == -1) - i = (int) exact_log2 ((v ^ 0xffff) & 0xffff); - if (i == -1) - i = (int) exact_log2 ((v ^ 0xff) & 0xff); - /* Bit position. */ - fprintf (file, "%d", i); - } - break; - case 'x': - /* Unsigned byte. */ - fprintf (file, HOST_WIDE_INT_PRINT_HEX, - INTVAL (r) & 0xff); - break; - case 'X': - /* Unsigned word. */ - fprintf (file, HOST_WIDE_INT_PRINT_HEX, - INTVAL (r) & 0xffff); - break; - case 'p': - /* pushm and popm encode a register set into a single byte. */ - comma = ""; - for (b = 7; b >= 0; b--) - if (INTVAL (r) & (1 << b)) - { - fprintf (file, "%s%s", comma, pushm_regs[b]); - comma = ","; - } - break; - case 'm': - /* "Minus". Output -X */ - ival = (-INTVAL (r) & 0xffff); - if (ival & 0x8000) - ival = ival - 0x10000; - fprintf (file, HOST_WIDE_INT_PRINT_DEC, ival); - break; - default: - ival = INTVAL (r); - if (conversions[i].format[j + 1] == '[' && ival < 0) - { - /* We can simulate negative displacements by - taking advantage of address space - wrapping when the offset can span the - entire address range. */ - rtx base = - patternr[conversions[i].format[j + 2] - '0']; - if (GET_CODE (base) == REG) - switch (REGNO (base)) - { - case A0_REGNO: - case A1_REGNO: - if (TARGET_A24) - ival = 0x1000000 + ival; - else - ival = 0x10000 + ival; - break; - case SB_REGNO: - if (TARGET_A16) - ival = 0x10000 + ival; - break; - } - } - else if (code == 'd' && ival < 0 && j == 0) - /* The "mova" opcode is used to do addition by - computing displacements, but again, we need - displacements to be unsigned *if* they're - the only component of the displacement - (i.e. no "symbol-4" type displacement). */ - ival = (TARGET_A24 ? 0x1000000 : 0x10000) + ival; - - if (conversions[i].format[j] == '0') - { - /* More conversions to unsigned. */ - if (unsigned_const == 2) - ival &= 0xffff; - if (unsigned_const == 1) - ival &= 0xff; - } - if (streq (conversions[i].pattern, "mi") - || streq (conversions[i].pattern, "mmi")) - { - /* Integers used as addresses are unsigned. */ - ival &= (TARGET_A24 ? 0xffffff : 0xffff); - } - if (force_sign && ival >= 0) - fputc ('+', file); - fprintf (file, HOST_WIDE_INT_PRINT_DEC, ival); - break; - } - break; - case CONST_DOUBLE: - /* We don't have const_double constants. If it - happens, make it obvious. */ - fprintf (file, "[const_double 0x%lx]", - (unsigned long) CONST_DOUBLE_HIGH (r)); - break; - case SYMBOL_REF: - assemble_name (file, XSTR (r, 0)); - break; - case LABEL_REF: - output_asm_label (r); - break; - default: - fprintf (stderr, "don't know how to print this operand:"); - debug_rtx (r); - gcc_unreachable (); - } - } - else - { - if (conversions[i].format[j] == 'z') - { - /* Some addressing modes *must* have a displacement, - so insert a zero here if needed. */ - int k; - for (k = j + 1; conversions[i].format[k]; k++) - if (ISDIGIT (conversions[i].format[k])) - { - rtx reg = patternr[conversions[i].format[k] - '0']; - if (GET_CODE (reg) == REG - && (REGNO (reg) == SB_REGNO - || REGNO (reg) == FB_REGNO - || REGNO (reg) == SP_REGNO)) - fputc ('0', file); - } - continue; - } - /* Signed displacements off symbols need to have signs - blended cleanly. */ - if (conversions[i].format[j] == '+' - && (!code || code == 'D' || code == 'd') - && ISDIGIT (conversions[i].format[j + 1]) - && (GET_CODE (patternr[conversions[i].format[j + 1] - '0']) - == CONST_INT)) - { - force_sign = 1; - continue; - } - fputc (conversions[i].format[j], file); - } - break; - } - if (!conversions[i].pattern) - { - fprintf (stderr, "unconvertible operand %c `%s'", code ? code : '-', - pattern); - debug_rtx (x); - fprintf (file, "[%c.%s]", code ? code : '-', pattern); - } - - return; -} - -/* Implements PRINT_OPERAND_PUNCT_VALID_P. See m32c_print_operand - above for descriptions of what these do. */ -int -m32c_print_operand_punct_valid_p (int c) -{ - if (c == '&' || c == '!') - return 1; - return 0; -} - -/* Implements PRINT_OPERAND_ADDRESS. Nothing unusual here. */ -void -m32c_print_operand_address (FILE * stream, rtx address) -{ - if (GET_CODE (address) == MEM) - address = XEXP (address, 0); - else - /* cf: gcc.dg/asm-4.c. */ - gcc_assert (GET_CODE (address) == REG); - - m32c_print_operand (stream, address, 0); -} - -/* Implements ASM_OUTPUT_REG_PUSH. Control registers are pushed - differently than general registers. */ -void -m32c_output_reg_push (FILE * s, int regno) -{ - if (regno == FLG_REGNO) - fprintf (s, "\tpushc\tflg\n"); - else - fprintf (s, "\tpush.%c\t%s\n", - " bwll"[reg_push_size (regno)], reg_names[regno]); -} - -/* Likewise for ASM_OUTPUT_REG_POP. */ -void -m32c_output_reg_pop (FILE * s, int regno) -{ - if (regno == FLG_REGNO) - fprintf (s, "\tpopc\tflg\n"); - else - fprintf (s, "\tpop.%c\t%s\n", - " bwll"[reg_push_size (regno)], reg_names[regno]); -} - -/* Defining target-specific uses of `__attribute__' */ - -/* Used to simplify the logic below. Find the attributes wherever - they may be. */ -#define M32C_ATTRIBUTES(decl) \ - (TYPE_P (decl)) ? TYPE_ATTRIBUTES (decl) \ - : DECL_ATTRIBUTES (decl) \ - ? (DECL_ATTRIBUTES (decl)) \ - : TYPE_ATTRIBUTES (TREE_TYPE (decl)) - -/* Returns TRUE if the given tree has the "interrupt" attribute. */ -static int -interrupt_p (tree node ATTRIBUTE_UNUSED) -{ - tree list = M32C_ATTRIBUTES (node); - while (list) - { - if (is_attribute_p ("interrupt", TREE_PURPOSE (list))) - return 1; - list = TREE_CHAIN (list); - } - return fast_interrupt_p (node); -} - -/* Returns TRUE if the given tree has the "bank_switch" attribute. */ -static int -bank_switch_p (tree node ATTRIBUTE_UNUSED) -{ - tree list = M32C_ATTRIBUTES (node); - while (list) - { - if (is_attribute_p ("bank_switch", TREE_PURPOSE (list))) - return 1; - list = TREE_CHAIN (list); - } - return 0; -} - -/* Returns TRUE if the given tree has the "fast_interrupt" attribute. */ -static int -fast_interrupt_p (tree node ATTRIBUTE_UNUSED) -{ - tree list = M32C_ATTRIBUTES (node); - while (list) - { - if (is_attribute_p ("fast_interrupt", TREE_PURPOSE (list))) - return 1; - list = TREE_CHAIN (list); - } - return 0; -} - -static tree -interrupt_handler (tree * node ATTRIBUTE_UNUSED, - tree name ATTRIBUTE_UNUSED, - tree args ATTRIBUTE_UNUSED, - int flags ATTRIBUTE_UNUSED, - bool * no_add_attrs ATTRIBUTE_UNUSED) -{ - return NULL_TREE; -} - -/* Returns TRUE if given tree has the "function_vector" attribute. */ -int -m32c_special_page_vector_p (tree func) -{ - tree list; - - if (TREE_CODE (func) != FUNCTION_DECL) - return 0; - - list = M32C_ATTRIBUTES (func); - while (list) - { - if (is_attribute_p ("function_vector", TREE_PURPOSE (list))) - return 1; - list = TREE_CHAIN (list); - } - return 0; -} - -static tree -function_vector_handler (tree * node ATTRIBUTE_UNUSED, - tree name ATTRIBUTE_UNUSED, - tree args ATTRIBUTE_UNUSED, - int flags ATTRIBUTE_UNUSED, - bool * no_add_attrs ATTRIBUTE_UNUSED) -{ - if (TARGET_R8C) - { - /* The attribute is not supported for R8C target. */ - warning (OPT_Wattributes, - "%qE attribute is not supported for R8C target", - name); - *no_add_attrs = true; - } - else if (TREE_CODE (*node) != FUNCTION_DECL) - { - /* The attribute must be applied to functions only. */ - warning (OPT_Wattributes, - "%qE attribute applies only to functions", - name); - *no_add_attrs = true; - } - else if (TREE_CODE (TREE_VALUE (args)) != INTEGER_CST) - { - /* The argument must be a constant integer. */ - warning (OPT_Wattributes, - "%qE attribute argument not an integer constant", - name); - *no_add_attrs = true; - } - else if (TREE_INT_CST_LOW (TREE_VALUE (args)) < 18 - || TREE_INT_CST_LOW (TREE_VALUE (args)) > 255) - { - /* The argument value must be between 18 to 255. */ - warning (OPT_Wattributes, - "%qE attribute argument should be between 18 to 255", - name); - *no_add_attrs = true; - } - return NULL_TREE; -} - -/* If the function is assigned the attribute 'function_vector', it - returns the function vector number, otherwise returns zero. */ -int -current_function_special_page_vector (rtx x) -{ - int num; - - if ((GET_CODE(x) == SYMBOL_REF) - && (SYMBOL_REF_FLAGS (x) & SYMBOL_FLAG_FUNCVEC_FUNCTION)) - { - tree list; - tree t = SYMBOL_REF_DECL (x); - - if (TREE_CODE (t) != FUNCTION_DECL) - return 0; - - list = M32C_ATTRIBUTES (t); - while (list) - { - if (is_attribute_p ("function_vector", TREE_PURPOSE (list))) - { - num = TREE_INT_CST_LOW (TREE_VALUE (TREE_VALUE (list))); - return num; - } - - list = TREE_CHAIN (list); - } - - return 0; - } - else - return 0; -} - -#undef TARGET_ATTRIBUTE_TABLE -#define TARGET_ATTRIBUTE_TABLE m32c_attribute_table -static const struct attribute_spec m32c_attribute_table[] = { - {"interrupt", 0, 0, false, false, false, interrupt_handler}, - {"bank_switch", 0, 0, false, false, false, interrupt_handler}, - {"fast_interrupt", 0, 0, false, false, false, interrupt_handler}, - {"function_vector", 1, 1, true, false, false, function_vector_handler}, - {0, 0, 0, 0, 0, 0, 0} -}; - -#undef TARGET_COMP_TYPE_ATTRIBUTES -#define TARGET_COMP_TYPE_ATTRIBUTES m32c_comp_type_attributes -static int -m32c_comp_type_attributes (const_tree type1 ATTRIBUTE_UNUSED, - const_tree type2 ATTRIBUTE_UNUSED) -{ - /* 0=incompatible 1=compatible 2=warning */ - return 1; -} - -#undef TARGET_INSERT_ATTRIBUTES -#define TARGET_INSERT_ATTRIBUTES m32c_insert_attributes -static void -m32c_insert_attributes (tree node ATTRIBUTE_UNUSED, - tree * attr_ptr ATTRIBUTE_UNUSED) -{ - unsigned addr; - /* See if we need to make #pragma address variables volatile. */ - - if (TREE_CODE (node) == VAR_DECL) - { - const char *name = IDENTIFIER_POINTER (DECL_NAME (node)); - if (m32c_get_pragma_address (name, &addr)) - { - TREE_THIS_VOLATILE (node) = true; - } - } -} - - -struct GTY(()) pragma_entry { - const char *varname; - unsigned address; -}; -typedef struct pragma_entry pragma_entry; - -/* Hash table of pragma info. */ -static GTY((param_is (pragma_entry))) htab_t pragma_htab; - -static int -pragma_entry_eq (const void *p1, const void *p2) -{ - const pragma_entry *old = (const pragma_entry *) p1; - const char *new_name = (const char *) p2; - - return strcmp (old->varname, new_name) == 0; -} - -static hashval_t -pragma_entry_hash (const void *p) -{ - const pragma_entry *old = (const pragma_entry *) p; - return htab_hash_string (old->varname); -} - -void -m32c_note_pragma_address (const char *varname, unsigned address) -{ - pragma_entry **slot; - - if (!pragma_htab) - pragma_htab = htab_create_ggc (31, pragma_entry_hash, - pragma_entry_eq, NULL); - - slot = (pragma_entry **) - htab_find_slot_with_hash (pragma_htab, varname, - htab_hash_string (varname), INSERT); - - if (!*slot) - { - *slot = ggc_alloc_pragma_entry (); - (*slot)->varname = ggc_strdup (varname); - } - (*slot)->address = address; -} - -static bool -m32c_get_pragma_address (const char *varname, unsigned *address) -{ - pragma_entry **slot; - - if (!pragma_htab) - return false; - - slot = (pragma_entry **) - htab_find_slot_with_hash (pragma_htab, varname, - htab_hash_string (varname), NO_INSERT); - if (slot && *slot) - { - *address = (*slot)->address; - return true; - } - return false; -} - -void -m32c_output_aligned_common (FILE *stream, tree decl ATTRIBUTE_UNUSED, - const char *name, - int size, int align, int global) -{ - unsigned address; - - if (m32c_get_pragma_address (name, &address)) - { - /* We never output these as global. */ - assemble_name (stream, name); - fprintf (stream, " = 0x%04x\n", address); - return; - } - if (!global) - { - fprintf (stream, "\t.local\t"); - assemble_name (stream, name); - fprintf (stream, "\n"); - } - fprintf (stream, "\t.comm\t"); - assemble_name (stream, name); - fprintf (stream, ",%u,%u\n", size, align / BITS_PER_UNIT); -} - -/* Predicates */ - -/* This is a list of legal subregs of hard regs. */ -static const struct { - unsigned char outer_mode_size; - unsigned char inner_mode_size; - unsigned char byte_mask; - unsigned char legal_when; - unsigned int regno; -} legal_subregs[] = { - {1, 2, 0x03, 1, R0_REGNO}, /* r0h r0l */ - {1, 2, 0x03, 1, R1_REGNO}, /* r1h r1l */ - {1, 2, 0x01, 1, A0_REGNO}, - {1, 2, 0x01, 1, A1_REGNO}, - - {1, 4, 0x01, 1, A0_REGNO}, - {1, 4, 0x01, 1, A1_REGNO}, - - {2, 4, 0x05, 1, R0_REGNO}, /* r2 r0 */ - {2, 4, 0x05, 1, R1_REGNO}, /* r3 r1 */ - {2, 4, 0x05, 16, A0_REGNO}, /* a1 a0 */ - {2, 4, 0x01, 24, A0_REGNO}, /* a1 a0 */ - {2, 4, 0x01, 24, A1_REGNO}, /* a1 a0 */ - - {4, 8, 0x55, 1, R0_REGNO}, /* r3 r1 r2 r0 */ -}; - -/* Returns TRUE if OP is a subreg of a hard reg which we don't - support. We also bail on MEMs with illegal addresses. */ -bool -m32c_illegal_subreg_p (rtx op) -{ - int offset; - unsigned int i; - int src_mode, dest_mode; - - if (GET_CODE (op) == MEM - && ! m32c_legitimate_address_p (Pmode, XEXP (op, 0), false)) - { - return true; - } - - if (GET_CODE (op) != SUBREG) - return false; - - dest_mode = GET_MODE (op); - offset = SUBREG_BYTE (op); - op = SUBREG_REG (op); - src_mode = GET_MODE (op); - - if (GET_MODE_SIZE (dest_mode) == GET_MODE_SIZE (src_mode)) - return false; - if (GET_CODE (op) != REG) - return false; - if (REGNO (op) >= MEM0_REGNO) - return false; - - offset = (1 << offset); - - for (i = 0; i < ARRAY_SIZE (legal_subregs); i ++) - if (legal_subregs[i].outer_mode_size == GET_MODE_SIZE (dest_mode) - && legal_subregs[i].regno == REGNO (op) - && legal_subregs[i].inner_mode_size == GET_MODE_SIZE (src_mode) - && legal_subregs[i].byte_mask & offset) - { - switch (legal_subregs[i].legal_when) - { - case 1: - return false; - case 16: - if (TARGET_A16) - return false; - break; - case 24: - if (TARGET_A24) - return false; - break; - } - } - return true; -} - -/* Returns TRUE if we support a move between the first two operands. - At the moment, we just want to discourage mem to mem moves until - after reload, because reload has a hard time with our limited - number of address registers, and we can get into a situation where - we need three of them when we only have two. */ -bool -m32c_mov_ok (rtx * operands, enum machine_mode mode ATTRIBUTE_UNUSED) -{ - rtx op0 = operands[0]; - rtx op1 = operands[1]; - - if (TARGET_A24) - return true; - -#define DEBUG_MOV_OK 0 -#if DEBUG_MOV_OK - fprintf (stderr, "m32c_mov_ok %s\n", mode_name[mode]); - debug_rtx (op0); - debug_rtx (op1); -#endif - - if (GET_CODE (op0) == SUBREG) - op0 = XEXP (op0, 0); - if (GET_CODE (op1) == SUBREG) - op1 = XEXP (op1, 0); - - if (GET_CODE (op0) == MEM - && GET_CODE (op1) == MEM - && ! reload_completed) - { -#if DEBUG_MOV_OK - fprintf (stderr, " - no, mem to mem\n"); -#endif - return false; - } - -#if DEBUG_MOV_OK - fprintf (stderr, " - ok\n"); -#endif - return true; -} - -/* Returns TRUE if two consecutive HImode mov instructions, generated - for moving an immediate double data to a double data type variable - location, can be combined into single SImode mov instruction. */ -bool -m32c_immd_dbl_mov (rtx * operands, - enum machine_mode mode ATTRIBUTE_UNUSED) -{ - int flag = 0, okflag = 0, offset1 = 0, offset2 = 0, offsetsign = 0; - const char *str1; - const char *str2; - - if (GET_CODE (XEXP (operands[0], 0)) == SYMBOL_REF - && MEM_SCALAR_P (operands[0]) - && !MEM_IN_STRUCT_P (operands[0]) - && GET_CODE (XEXP (operands[2], 0)) == CONST - && GET_CODE (XEXP (XEXP (operands[2], 0), 0)) == PLUS - && GET_CODE (XEXP (XEXP (XEXP (operands[2], 0), 0), 0)) == SYMBOL_REF - && GET_CODE (XEXP (XEXP (XEXP (operands[2], 0), 0), 1)) == CONST_INT - && MEM_SCALAR_P (operands[2]) - && !MEM_IN_STRUCT_P (operands[2])) - flag = 1; - - else if (GET_CODE (XEXP (operands[0], 0)) == CONST - && GET_CODE (XEXP (XEXP (operands[0], 0), 0)) == PLUS - && GET_CODE (XEXP (XEXP (XEXP (operands[0], 0), 0), 0)) == SYMBOL_REF - && MEM_SCALAR_P (operands[0]) - && !MEM_IN_STRUCT_P (operands[0]) - && !(INTVAL (XEXP (XEXP (XEXP (operands[0], 0), 0), 1)) %4) - && GET_CODE (XEXP (operands[2], 0)) == CONST - && GET_CODE (XEXP (XEXP (operands[2], 0), 0)) == PLUS - && GET_CODE (XEXP (XEXP (XEXP (operands[2], 0), 0), 0)) == SYMBOL_REF - && MEM_SCALAR_P (operands[2]) - && !MEM_IN_STRUCT_P (operands[2])) - flag = 2; - - else if (GET_CODE (XEXP (operands[0], 0)) == PLUS - && GET_CODE (XEXP (XEXP (operands[0], 0), 0)) == REG - && REGNO (XEXP (XEXP (operands[0], 0), 0)) == FB_REGNO - && GET_CODE (XEXP (XEXP (operands[0], 0), 1)) == CONST_INT - && MEM_SCALAR_P (operands[0]) - && !MEM_IN_STRUCT_P (operands[0]) - && !(INTVAL (XEXP (XEXP (operands[0], 0), 1)) %4) - && REGNO (XEXP (XEXP (operands[2], 0), 0)) == FB_REGNO - && GET_CODE (XEXP (XEXP (operands[2], 0), 1)) == CONST_INT - && MEM_SCALAR_P (operands[2]) - && !MEM_IN_STRUCT_P (operands[2])) - flag = 3; - - else - return false; - - switch (flag) - { - case 1: - str1 = XSTR (XEXP (operands[0], 0), 0); - str2 = XSTR (XEXP (XEXP (XEXP (operands[2], 0), 0), 0), 0); - if (strcmp (str1, str2) == 0) - okflag = 1; - else - okflag = 0; - break; - case 2: - str1 = XSTR (XEXP (XEXP (XEXP (operands[0], 0), 0), 0), 0); - str2 = XSTR (XEXP (XEXP (XEXP (operands[2], 0), 0), 0), 0); - if (strcmp(str1,str2) == 0) - okflag = 1; - else - okflag = 0; - break; - case 3: - offset1 = INTVAL (XEXP (XEXP (operands[0], 0), 1)); - offset2 = INTVAL (XEXP (XEXP (operands[2], 0), 1)); - offsetsign = offset1 >> ((sizeof (offset1) * 8) -1); - if (((offset2-offset1) == 2) && offsetsign != 0) - okflag = 1; - else - okflag = 0; - break; - default: - okflag = 0; - } - - if (okflag == 1) - { - HOST_WIDE_INT val; - operands[4] = gen_rtx_MEM (SImode, XEXP (operands[0], 0)); - - val = (INTVAL (operands[3]) << 16) + (INTVAL (operands[1]) & 0xFFFF); - operands[5] = gen_rtx_CONST_INT (VOIDmode, val); - - return true; - } - - return false; -} - -/* Expanders */ - -/* Subregs are non-orthogonal for us, because our registers are all - different sizes. */ -static rtx -m32c_subreg (enum machine_mode outer, - rtx x, enum machine_mode inner, int byte) -{ - int r, nr = -1; - - /* Converting MEMs to different types that are the same size, we - just rewrite them. */ - if (GET_CODE (x) == SUBREG - && SUBREG_BYTE (x) == 0 - && GET_CODE (SUBREG_REG (x)) == MEM - && (GET_MODE_SIZE (GET_MODE (x)) - == GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))))) - { - rtx oldx = x; - x = gen_rtx_MEM (GET_MODE (x), XEXP (SUBREG_REG (x), 0)); - MEM_COPY_ATTRIBUTES (x, SUBREG_REG (oldx)); - } - - /* Push/pop get done as smaller push/pops. */ - if (GET_CODE (x) == MEM - && (GET_CODE (XEXP (x, 0)) == PRE_DEC - || GET_CODE (XEXP (x, 0)) == POST_INC)) - return gen_rtx_MEM (outer, XEXP (x, 0)); - if (GET_CODE (x) == SUBREG - && GET_CODE (XEXP (x, 0)) == MEM - && (GET_CODE (XEXP (XEXP (x, 0), 0)) == PRE_DEC - || GET_CODE (XEXP (XEXP (x, 0), 0)) == POST_INC)) - return gen_rtx_MEM (outer, XEXP (XEXP (x, 0), 0)); - - if (GET_CODE (x) != REG) - { - rtx r = simplify_gen_subreg (outer, x, inner, byte); - if (GET_CODE (r) == SUBREG - && GET_CODE (x) == MEM - && MEM_VOLATILE_P (x)) - { - /* Volatile MEMs don't get simplified, but we need them to - be. We are little endian, so the subreg byte is the - offset. */ - r = adjust_address_nv (x, outer, byte); - } - return r; - } - - r = REGNO (x); - if (r >= FIRST_PSEUDO_REGISTER || r == AP_REGNO) - return simplify_gen_subreg (outer, x, inner, byte); - - if (IS_MEM_REGNO (r)) - return simplify_gen_subreg (outer, x, inner, byte); - - /* This is where the complexities of our register layout are - described. */ - if (byte == 0) - nr = r; - else if (outer == HImode) - { - if (r == R0_REGNO && byte == 2) - nr = R2_REGNO; - else if (r == R0_REGNO && byte == 4) - nr = R1_REGNO; - else if (r == R0_REGNO && byte == 6) - nr = R3_REGNO; - else if (r == R1_REGNO && byte == 2) - nr = R3_REGNO; - else if (r == A0_REGNO && byte == 2) - nr = A1_REGNO; - } - else if (outer == SImode) - { - if (r == R0_REGNO && byte == 0) - nr = R0_REGNO; - else if (r == R0_REGNO && byte == 4) - nr = R1_REGNO; - } - if (nr == -1) - { - fprintf (stderr, "m32c_subreg %s %s %d\n", - mode_name[outer], mode_name[inner], byte); - debug_rtx (x); - gcc_unreachable (); - } - return gen_rtx_REG (outer, nr); -} - -/* Used to emit move instructions. We split some moves, - and avoid mem-mem moves. */ -int -m32c_prepare_move (rtx * operands, enum machine_mode mode) -{ - if (far_addr_space_p (operands[0]) - && CONSTANT_P (operands[1])) - { - operands[1] = force_reg (GET_MODE (operands[0]), operands[1]); - } - if (TARGET_A16 && mode == PSImode) - return m32c_split_move (operands, mode, 1); - if ((GET_CODE (operands[0]) == MEM) - && (GET_CODE (XEXP (operands[0], 0)) == PRE_MODIFY)) - { - rtx pmv = XEXP (operands[0], 0); - rtx dest_reg = XEXP (pmv, 0); - rtx dest_mod = XEXP (pmv, 1); - - emit_insn (gen_rtx_SET (Pmode, dest_reg, dest_mod)); - operands[0] = gen_rtx_MEM (mode, dest_reg); - } - if (can_create_pseudo_p () && MEM_P (operands[0]) && MEM_P (operands[1])) - operands[1] = copy_to_mode_reg (mode, operands[1]); - return 0; -} - -#define DEBUG_SPLIT 0 - -/* Returns TRUE if the given PSImode move should be split. We split - for all r8c/m16c moves, since it doesn't support them, and for - POP.L as we can only *push* SImode. */ -int -m32c_split_psi_p (rtx * operands) -{ -#if DEBUG_SPLIT - fprintf (stderr, "\nm32c_split_psi_p\n"); - debug_rtx (operands[0]); - debug_rtx (operands[1]); -#endif - if (TARGET_A16) - { -#if DEBUG_SPLIT - fprintf (stderr, "yes, A16\n"); -#endif - return 1; - } - if (GET_CODE (operands[1]) == MEM - && GET_CODE (XEXP (operands[1], 0)) == POST_INC) - { -#if DEBUG_SPLIT - fprintf (stderr, "yes, pop.l\n"); -#endif - return 1; - } -#if DEBUG_SPLIT - fprintf (stderr, "no, default\n"); -#endif - return 0; -} - -/* Split the given move. SPLIT_ALL is 0 if splitting is optional - (define_expand), 1 if it is not optional (define_insn_and_split), - and 3 for define_split (alternate api). */ -int -m32c_split_move (rtx * operands, enum machine_mode mode, int split_all) -{ - rtx s[4], d[4]; - int parts, si, di, rev = 0; - int rv = 0, opi = 2; - enum machine_mode submode = HImode; - rtx *ops, local_ops[10]; - - /* define_split modifies the existing operands, but the other two - emit new insns. OPS is where we store the operand pairs, which - we emit later. */ - if (split_all == 3) - ops = operands; - else - ops = local_ops; - - /* Else HImode. */ - if (mode == DImode) - submode = SImode; - - /* Before splitting mem-mem moves, force one operand into a - register. */ - if (can_create_pseudo_p () && MEM_P (operands[0]) && MEM_P (operands[1])) - { -#if DEBUG0 - fprintf (stderr, "force_reg...\n"); - debug_rtx (operands[1]); -#endif - operands[1] = force_reg (mode, operands[1]); -#if DEBUG0 - debug_rtx (operands[1]); -#endif - } - - parts = 2; - -#if DEBUG_SPLIT - fprintf (stderr, "\nsplit_move %d all=%d\n", !can_create_pseudo_p (), - split_all); - debug_rtx (operands[0]); - debug_rtx (operands[1]); -#endif - - /* Note that split_all is not used to select the api after this - point, so it's safe to set it to 3 even with define_insn. */ - /* None of the chips can move SI operands to sp-relative addresses, - so we always split those. */ - if (m32c_extra_constraint_p (operands[0], 'S', "Ss")) - split_all = 3; - - if (TARGET_A16 - && (far_addr_space_p (operands[0]) - || far_addr_space_p (operands[1]))) - split_all |= 1; - - /* We don't need to split these. */ - if (TARGET_A24 - && split_all != 3 - && (mode == SImode || mode == PSImode) - && !(GET_CODE (operands[1]) == MEM - && GET_CODE (XEXP (operands[1], 0)) == POST_INC)) - return 0; - - /* First, enumerate the subregs we'll be dealing with. */ - for (si = 0; si < parts; si++) - { - d[si] = - m32c_subreg (submode, operands[0], mode, - si * GET_MODE_SIZE (submode)); - s[si] = - m32c_subreg (submode, operands[1], mode, - si * GET_MODE_SIZE (submode)); - } - - /* Split pushes by emitting a sequence of smaller pushes. */ - if (GET_CODE (d[0]) == MEM && GET_CODE (XEXP (d[0], 0)) == PRE_DEC) - { - for (si = parts - 1; si >= 0; si--) - { - ops[opi++] = gen_rtx_MEM (submode, - gen_rtx_PRE_DEC (Pmode, - gen_rtx_REG (Pmode, - SP_REGNO))); - ops[opi++] = s[si]; - } - - rv = 1; - } - /* Likewise for pops. */ - else if (GET_CODE (s[0]) == MEM && GET_CODE (XEXP (s[0], 0)) == POST_INC) - { - for (di = 0; di < parts; di++) - { - ops[opi++] = d[di]; - ops[opi++] = gen_rtx_MEM (submode, - gen_rtx_POST_INC (Pmode, - gen_rtx_REG (Pmode, - SP_REGNO))); - } - rv = 1; - } - else if (split_all) - { - /* if d[di] == s[si] for any di < si, we'll early clobber. */ - for (di = 0; di < parts - 1; di++) - for (si = di + 1; si < parts; si++) - if (reg_mentioned_p (d[di], s[si])) - rev = 1; - - if (rev) - for (si = 0; si < parts; si++) - { - ops[opi++] = d[si]; - ops[opi++] = s[si]; - } - else - for (si = parts - 1; si >= 0; si--) - { - ops[opi++] = d[si]; - ops[opi++] = s[si]; - } - rv = 1; - } - /* Now emit any moves we may have accumulated. */ - if (rv && split_all != 3) - { - int i; - for (i = 2; i < opi; i += 2) - emit_move_insn (ops[i], ops[i + 1]); - } - return rv; -} - -/* The m32c has a number of opcodes that act like memcpy, strcmp, and - the like. For the R8C they expect one of the addresses to be in - R1L:An so we need to arrange for that. Otherwise, it's just a - matter of picking out the operands we want and emitting the right - pattern for them. All these expanders, which correspond to - patterns in blkmov.md, must return nonzero if they expand the insn, - or zero if they should FAIL. */ - -/* This is a memset() opcode. All operands are implied, so we need to - arrange for them to be in the right registers. The opcode wants - addresses, not [mem] syntax. $0 is the destination (MEM:BLK), $1 - the count (HI), and $2 the value (QI). */ -int -m32c_expand_setmemhi(rtx *operands) -{ - rtx desta, count, val; - rtx desto, counto; - - desta = XEXP (operands[0], 0); - count = operands[1]; - val = operands[2]; - - desto = gen_reg_rtx (Pmode); - counto = gen_reg_rtx (HImode); - - if (GET_CODE (desta) != REG - || REGNO (desta) < FIRST_PSEUDO_REGISTER) - desta = copy_to_mode_reg (Pmode, desta); - - /* This looks like an arbitrary restriction, but this is by far the - most common case. For counts 8..14 this actually results in - smaller code with no speed penalty because the half-sized - constant can be loaded with a shorter opcode. */ - if (GET_CODE (count) == CONST_INT - && GET_CODE (val) == CONST_INT - && ! (INTVAL (count) & 1) - && (INTVAL (count) > 1) - && (INTVAL (val) <= 7 && INTVAL (val) >= -8)) - { - unsigned v = INTVAL (val) & 0xff; - v = v | (v << 8); - count = copy_to_mode_reg (HImode, GEN_INT (INTVAL (count) / 2)); - val = copy_to_mode_reg (HImode, GEN_INT (v)); - if (TARGET_A16) - emit_insn (gen_setmemhi_whi_op (desto, counto, val, desta, count)); - else - emit_insn (gen_setmemhi_wpsi_op (desto, counto, val, desta, count)); - return 1; - } - - /* This is the generalized memset() case. */ - if (GET_CODE (val) != REG - || REGNO (val) < FIRST_PSEUDO_REGISTER) - val = copy_to_mode_reg (QImode, val); - - if (GET_CODE (count) != REG - || REGNO (count) < FIRST_PSEUDO_REGISTER) - count = copy_to_mode_reg (HImode, count); - - if (TARGET_A16) - emit_insn (gen_setmemhi_bhi_op (desto, counto, val, desta, count)); - else - emit_insn (gen_setmemhi_bpsi_op (desto, counto, val, desta, count)); - - return 1; -} - -/* This is a memcpy() opcode. All operands are implied, so we need to - arrange for them to be in the right registers. The opcode wants - addresses, not [mem] syntax. $0 is the destination (MEM:BLK), $1 - is the source (MEM:BLK), and $2 the count (HI). */ -int -m32c_expand_movmemhi(rtx *operands) -{ - rtx desta, srca, count; - rtx desto, srco, counto; - - desta = XEXP (operands[0], 0); - srca = XEXP (operands[1], 0); - count = operands[2]; - - desto = gen_reg_rtx (Pmode); - srco = gen_reg_rtx (Pmode); - counto = gen_reg_rtx (HImode); - - if (GET_CODE (desta) != REG - || REGNO (desta) < FIRST_PSEUDO_REGISTER) - desta = copy_to_mode_reg (Pmode, desta); - - if (GET_CODE (srca) != REG - || REGNO (srca) < FIRST_PSEUDO_REGISTER) - srca = copy_to_mode_reg (Pmode, srca); - - /* Similar to setmem, but we don't need to check the value. */ - if (GET_CODE (count) == CONST_INT - && ! (INTVAL (count) & 1) - && (INTVAL (count) > 1)) - { - count = copy_to_mode_reg (HImode, GEN_INT (INTVAL (count) / 2)); - if (TARGET_A16) - emit_insn (gen_movmemhi_whi_op (desto, srco, counto, desta, srca, count)); - else - emit_insn (gen_movmemhi_wpsi_op (desto, srco, counto, desta, srca, count)); - return 1; - } - - /* This is the generalized memset() case. */ - if (GET_CODE (count) != REG - || REGNO (count) < FIRST_PSEUDO_REGISTER) - count = copy_to_mode_reg (HImode, count); - - if (TARGET_A16) - emit_insn (gen_movmemhi_bhi_op (desto, srco, counto, desta, srca, count)); - else - emit_insn (gen_movmemhi_bpsi_op (desto, srco, counto, desta, srca, count)); - - return 1; -} - -/* This is a stpcpy() opcode. $0 is the destination (MEM:BLK) after - the copy, which should point to the NUL at the end of the string, - $1 is the destination (MEM:BLK), and $2 is the source (MEM:BLK). - Since our opcode leaves the destination pointing *after* the NUL, - we must emit an adjustment. */ -int -m32c_expand_movstr(rtx *operands) -{ - rtx desta, srca; - rtx desto, srco; - - desta = XEXP (operands[1], 0); - srca = XEXP (operands[2], 0); - - desto = gen_reg_rtx (Pmode); - srco = gen_reg_rtx (Pmode); - - if (GET_CODE (desta) != REG - || REGNO (desta) < FIRST_PSEUDO_REGISTER) - desta = copy_to_mode_reg (Pmode, desta); - - if (GET_CODE (srca) != REG - || REGNO (srca) < FIRST_PSEUDO_REGISTER) - srca = copy_to_mode_reg (Pmode, srca); - - emit_insn (gen_movstr_op (desto, srco, desta, srca)); - /* desto ends up being a1, which allows this type of add through MOVA. */ - emit_insn (gen_addpsi3 (operands[0], desto, GEN_INT (-1))); - - return 1; -} - -/* This is a strcmp() opcode. $0 is the destination (HI) which holds - <=>0 depending on the comparison, $1 is one string (MEM:BLK), and - $2 is the other (MEM:BLK). We must do the comparison, and then - convert the flags to a signed integer result. */ -int -m32c_expand_cmpstr(rtx *operands) -{ - rtx src1a, src2a; - - src1a = XEXP (operands[1], 0); - src2a = XEXP (operands[2], 0); - - if (GET_CODE (src1a) != REG - || REGNO (src1a) < FIRST_PSEUDO_REGISTER) - src1a = copy_to_mode_reg (Pmode, src1a); - - if (GET_CODE (src2a) != REG - || REGNO (src2a) < FIRST_PSEUDO_REGISTER) - src2a = copy_to_mode_reg (Pmode, src2a); - - emit_insn (gen_cmpstrhi_op (src1a, src2a, src1a, src2a)); - emit_insn (gen_cond_to_int (operands[0])); - - return 1; -} - - -typedef rtx (*shift_gen_func)(rtx, rtx, rtx); - -static shift_gen_func -shift_gen_func_for (int mode, int code) -{ -#define GFF(m,c,f) if (mode == m && code == c) return f - GFF(QImode, ASHIFT, gen_ashlqi3_i); - GFF(QImode, ASHIFTRT, gen_ashrqi3_i); - GFF(QImode, LSHIFTRT, gen_lshrqi3_i); - GFF(HImode, ASHIFT, gen_ashlhi3_i); - GFF(HImode, ASHIFTRT, gen_ashrhi3_i); - GFF(HImode, LSHIFTRT, gen_lshrhi3_i); - GFF(PSImode, ASHIFT, gen_ashlpsi3_i); - GFF(PSImode, ASHIFTRT, gen_ashrpsi3_i); - GFF(PSImode, LSHIFTRT, gen_lshrpsi3_i); - GFF(SImode, ASHIFT, TARGET_A16 ? gen_ashlsi3_16 : gen_ashlsi3_24); - GFF(SImode, ASHIFTRT, TARGET_A16 ? gen_ashrsi3_16 : gen_ashrsi3_24); - GFF(SImode, LSHIFTRT, TARGET_A16 ? gen_lshrsi3_16 : gen_lshrsi3_24); -#undef GFF - gcc_unreachable (); -} - -/* The m32c only has one shift, but it takes a signed count. GCC - doesn't want this, so we fake it by negating any shift count when - we're pretending to shift the other way. Also, the shift count is - limited to -8..8. It's slightly better to use two shifts for 9..15 - than to load the count into r1h, so we do that too. */ -int -m32c_prepare_shift (rtx * operands, int scale, int shift_code) -{ - enum machine_mode mode = GET_MODE (operands[0]); - shift_gen_func func = shift_gen_func_for (mode, shift_code); - rtx temp; - - if (GET_CODE (operands[2]) == CONST_INT) - { - int maxc = TARGET_A24 && (mode == PSImode || mode == SImode) ? 32 : 8; - int count = INTVAL (operands[2]) * scale; - - while (count > maxc) - { - temp = gen_reg_rtx (mode); - emit_insn (func (temp, operands[1], GEN_INT (maxc))); - operands[1] = temp; - count -= maxc; - } - while (count < -maxc) - { - temp = gen_reg_rtx (mode); - emit_insn (func (temp, operands[1], GEN_INT (-maxc))); - operands[1] = temp; - count += maxc; - } - emit_insn (func (operands[0], operands[1], GEN_INT (count))); - return 1; - } - - temp = gen_reg_rtx (QImode); - if (scale < 0) - /* The pattern has a NEG that corresponds to this. */ - emit_move_insn (temp, gen_rtx_NEG (QImode, operands[2])); - else if (TARGET_A16 && mode == SImode) - /* We do this because the code below may modify this, we don't - want to modify the origin of this value. */ - emit_move_insn (temp, operands[2]); - else - /* We'll only use it for the shift, no point emitting a move. */ - temp = operands[2]; - - if (TARGET_A16 && GET_MODE_SIZE (mode) == 4) - { - /* The m16c has a limit of -16..16 for SI shifts, even when the - shift count is in a register. Since there are so many targets - of these shifts, it's better to expand the RTL here than to - call a helper function. - - The resulting code looks something like this: - - cmp.b r1h,-16 - jge.b 1f - shl.l -16,dest - add.b r1h,16 - 1f: cmp.b r1h,16 - jle.b 1f - shl.l 16,dest - sub.b r1h,16 - 1f: shl.l r1h,dest - - We take advantage of the fact that "negative" shifts are - undefined to skip one of the comparisons. */ - - rtx count; - rtx label, insn, tempvar; - - emit_move_insn (operands[0], operands[1]); - - count = temp; - label = gen_label_rtx (); - LABEL_NUSES (label) ++; - - tempvar = gen_reg_rtx (mode); - - if (shift_code == ASHIFT) - { - /* This is a left shift. We only need check positive counts. */ - emit_jump_insn (gen_cbranchqi4 (gen_rtx_LE (VOIDmode, 0, 0), - count, GEN_INT (16), label)); - emit_insn (func (tempvar, operands[0], GEN_INT (8))); - emit_insn (func (operands[0], tempvar, GEN_INT (8))); - insn = emit_insn (gen_addqi3 (count, count, GEN_INT (-16))); - emit_label_after (label, insn); - } - else - { - /* This is a right shift. We only need check negative counts. */ - emit_jump_insn (gen_cbranchqi4 (gen_rtx_GE (VOIDmode, 0, 0), - count, GEN_INT (-16), label)); - emit_insn (func (tempvar, operands[0], GEN_INT (-8))); - emit_insn (func (operands[0], tempvar, GEN_INT (-8))); - insn = emit_insn (gen_addqi3 (count, count, GEN_INT (16))); - emit_label_after (label, insn); - } - operands[1] = operands[0]; - emit_insn (func (operands[0], operands[0], count)); - return 1; - } - - operands[2] = temp; - return 0; -} - -/* The m32c has a limited range of operations that work on PSImode - values; we have to expand to SI, do the math, and truncate back to - PSI. Yes, this is expensive, but hopefully gcc will learn to avoid - those cases. */ -void -m32c_expand_neg_mulpsi3 (rtx * operands) -{ - /* operands: a = b * i */ - rtx temp1; /* b as SI */ - rtx scale /* i as SI */; - rtx temp2; /* a*b as SI */ - - temp1 = gen_reg_rtx (SImode); - temp2 = gen_reg_rtx (SImode); - if (GET_CODE (operands[2]) != CONST_INT) - { - scale = gen_reg_rtx (SImode); - emit_insn (gen_zero_extendpsisi2 (scale, operands[2])); - } - else - scale = copy_to_mode_reg (SImode, operands[2]); - - emit_insn (gen_zero_extendpsisi2 (temp1, operands[1])); - temp2 = expand_simple_binop (SImode, MULT, temp1, scale, temp2, 1, OPTAB_LIB); - emit_insn (gen_truncsipsi2 (operands[0], temp2)); -} - -/* Pattern Output Functions */ - -int -m32c_expand_movcc (rtx *operands) -{ - rtx rel = operands[1]; - - if (GET_CODE (rel) != EQ && GET_CODE (rel) != NE) - return 1; - if (GET_CODE (operands[2]) != CONST_INT - || GET_CODE (operands[3]) != CONST_INT) - return 1; - if (GET_CODE (rel) == NE) - { - rtx tmp = operands[2]; - operands[2] = operands[3]; - operands[3] = tmp; - rel = gen_rtx_EQ (GET_MODE (rel), XEXP (rel, 0), XEXP (rel, 1)); - } - - emit_move_insn (operands[0], - gen_rtx_IF_THEN_ELSE (GET_MODE (operands[0]), - rel, - operands[2], - operands[3])); - return 0; -} - -/* Used for the "insv" pattern. Return nonzero to fail, else done. */ -int -m32c_expand_insv (rtx *operands) -{ - rtx op0, src0, p; - int mask; - - if (INTVAL (operands[1]) != 1) - return 1; - - /* Our insv opcode (bset, bclr) can only insert a one-bit constant. */ - if (GET_CODE (operands[3]) != CONST_INT) - return 1; - if (INTVAL (operands[3]) != 0 - && INTVAL (operands[3]) != 1 - && INTVAL (operands[3]) != -1) - return 1; - - mask = 1 << INTVAL (operands[2]); - - op0 = operands[0]; - if (GET_CODE (op0) == SUBREG - && SUBREG_BYTE (op0) == 0) - { - rtx sub = SUBREG_REG (op0); - if (GET_MODE (sub) == HImode || GET_MODE (sub) == QImode) - op0 = sub; - } - - if (!can_create_pseudo_p () - || (GET_CODE (op0) == MEM && MEM_VOLATILE_P (op0))) - src0 = op0; - else - { - src0 = gen_reg_rtx (GET_MODE (op0)); - emit_move_insn (src0, op0); - } - - if (GET_MODE (op0) == HImode - && INTVAL (operands[2]) >= 8 - && GET_CODE (op0) == MEM) - { - /* We are little endian. */ - rtx new_mem = gen_rtx_MEM (QImode, plus_constant (XEXP (op0, 0), 1)); - MEM_COPY_ATTRIBUTES (new_mem, op0); - mask >>= 8; - } - - /* First, we generate a mask with the correct polarity. If we are - storing a zero, we want an AND mask, so invert it. */ - if (INTVAL (operands[3]) == 0) - { - /* Storing a zero, use an AND mask */ - if (GET_MODE (op0) == HImode) - mask ^= 0xffff; - else - mask ^= 0xff; - } - /* Now we need to properly sign-extend the mask in case we need to - fall back to an AND or OR opcode. */ - if (GET_MODE (op0) == HImode) - { - if (mask & 0x8000) - mask -= 0x10000; - } - else - { - if (mask & 0x80) - mask -= 0x100; - } - - switch ( (INTVAL (operands[3]) ? 4 : 0) - + ((GET_MODE (op0) == HImode) ? 2 : 0) - + (TARGET_A24 ? 1 : 0)) - { - case 0: p = gen_andqi3_16 (op0, src0, GEN_INT (mask)); break; - case 1: p = gen_andqi3_24 (op0, src0, GEN_INT (mask)); break; - case 2: p = gen_andhi3_16 (op0, src0, GEN_INT (mask)); break; - case 3: p = gen_andhi3_24 (op0, src0, GEN_INT (mask)); break; - case 4: p = gen_iorqi3_16 (op0, src0, GEN_INT (mask)); break; - case 5: p = gen_iorqi3_24 (op0, src0, GEN_INT (mask)); break; - case 6: p = gen_iorhi3_16 (op0, src0, GEN_INT (mask)); break; - case 7: p = gen_iorhi3_24 (op0, src0, GEN_INT (mask)); break; - default: p = NULL_RTX; break; /* Not reached, but silences a warning. */ - } - - emit_insn (p); - return 0; -} - -const char * -m32c_scc_pattern(rtx *operands, RTX_CODE code) -{ - static char buf[30]; - if (GET_CODE (operands[0]) == REG - && REGNO (operands[0]) == R0_REGNO) - { - if (code == EQ) - return "stzx\t#1,#0,r0l"; - if (code == NE) - return "stzx\t#0,#1,r0l"; - } - sprintf(buf, "bm%s\t0,%%h0\n\tand.b\t#1,%%0", GET_RTX_NAME (code)); - return buf; -} - -/* Encode symbol attributes of a SYMBOL_REF into its - SYMBOL_REF_FLAGS. */ -static void -m32c_encode_section_info (tree decl, rtx rtl, int first) -{ - int extra_flags = 0; - - default_encode_section_info (decl, rtl, first); - if (TREE_CODE (decl) == FUNCTION_DECL - && m32c_special_page_vector_p (decl)) - - extra_flags = SYMBOL_FLAG_FUNCVEC_FUNCTION; - - if (extra_flags) - SYMBOL_REF_FLAGS (XEXP (rtl, 0)) |= extra_flags; -} - -/* Returns TRUE if the current function is a leaf, and thus we can - determine which registers an interrupt function really needs to - save. The logic below is mostly about finding the insn sequence - that's the function, versus any sequence that might be open for the - current insn. */ -static int -m32c_leaf_function_p (void) -{ - rtx saved_first, saved_last; - struct sequence_stack *seq; - int rv; - - saved_first = crtl->emit.x_first_insn; - saved_last = crtl->emit.x_last_insn; - for (seq = crtl->emit.sequence_stack; seq && seq->next; seq = seq->next) - ; - if (seq) - { - crtl->emit.x_first_insn = seq->first; - crtl->emit.x_last_insn = seq->last; - } - - rv = leaf_function_p (); - - crtl->emit.x_first_insn = saved_first; - crtl->emit.x_last_insn = saved_last; - return rv; -} - -/* Returns TRUE if the current function needs to use the ENTER/EXIT - opcodes. If the function doesn't need the frame base or stack - pointer, it can use the simpler RTS opcode. */ -static bool -m32c_function_needs_enter (void) -{ - rtx insn; - struct sequence_stack *seq; - rtx sp = gen_rtx_REG (Pmode, SP_REGNO); - rtx fb = gen_rtx_REG (Pmode, FB_REGNO); - - insn = get_insns (); - for (seq = crtl->emit.sequence_stack; - seq; - insn = seq->first, seq = seq->next); - - while (insn) - { - if (reg_mentioned_p (sp, insn)) - return true; - if (reg_mentioned_p (fb, insn)) - return true; - insn = NEXT_INSN (insn); - } - return false; -} - -/* Mark all the subexpressions of the PARALLEL rtx PAR as - frame-related. Return PAR. - - dwarf2out.c:dwarf2out_frame_debug_expr ignores sub-expressions of a - PARALLEL rtx other than the first if they do not have the - FRAME_RELATED flag set on them. So this function is handy for - marking up 'enter' instructions. */ -static rtx -m32c_all_frame_related (rtx par) -{ - int len = XVECLEN (par, 0); - int i; - - for (i = 0; i < len; i++) - F (XVECEXP (par, 0, i)); - - return par; -} - -/* Emits the prologue. See the frame layout comment earlier in this - file. We can reserve up to 256 bytes with the ENTER opcode, beyond - that we manually update sp. */ -void -m32c_emit_prologue (void) -{ - int frame_size, extra_frame_size = 0, reg_save_size; - int complex_prologue = 0; - - cfun->machine->is_leaf = m32c_leaf_function_p (); - if (interrupt_p (cfun->decl)) - { - cfun->machine->is_interrupt = 1; - complex_prologue = 1; - } - else if (bank_switch_p (cfun->decl)) - warning (OPT_Wattributes, - "%<bank_switch%> has no effect on non-interrupt functions"); - - reg_save_size = m32c_pushm_popm (PP_justcount); - - if (interrupt_p (cfun->decl)) - { - if (bank_switch_p (cfun->decl)) - emit_insn (gen_fset_b ()); - else if (cfun->machine->intr_pushm) - emit_insn (gen_pushm (GEN_INT (cfun->machine->intr_pushm))); - } - - frame_size = - m32c_initial_elimination_offset (FB_REGNO, SP_REGNO) - reg_save_size; - if (frame_size == 0 - && !m32c_function_needs_enter ()) - cfun->machine->use_rts = 1; - - if (frame_size > 254) - { - extra_frame_size = frame_size - 254; - frame_size = 254; - } - if (cfun->machine->use_rts == 0) - F (emit_insn (m32c_all_frame_related - (TARGET_A16 - ? gen_prologue_enter_16 (GEN_INT (frame_size + 2)) - : gen_prologue_enter_24 (GEN_INT (frame_size + 4))))); - - if (extra_frame_size) - { - complex_prologue = 1; - if (TARGET_A16) - F (emit_insn (gen_addhi3 (gen_rtx_REG (HImode, SP_REGNO), - gen_rtx_REG (HImode, SP_REGNO), - GEN_INT (-extra_frame_size)))); - else - F (emit_insn (gen_addpsi3 (gen_rtx_REG (PSImode, SP_REGNO), - gen_rtx_REG (PSImode, SP_REGNO), - GEN_INT (-extra_frame_size)))); - } - - complex_prologue += m32c_pushm_popm (PP_pushm); - - /* This just emits a comment into the .s file for debugging. */ - if (complex_prologue) - emit_insn (gen_prologue_end ()); -} - -/* Likewise, for the epilogue. The only exception is that, for - interrupts, we must manually unwind the frame as the REIT opcode - doesn't do that. */ -void -m32c_emit_epilogue (void) -{ - /* This just emits a comment into the .s file for debugging. */ - if (m32c_pushm_popm (PP_justcount) > 0 || cfun->machine->is_interrupt) - emit_insn (gen_epilogue_start ()); - - m32c_pushm_popm (PP_popm); - - if (cfun->machine->is_interrupt) - { - enum machine_mode spmode = TARGET_A16 ? HImode : PSImode; - - /* REIT clears B flag and restores $fp for us, but we still - have to fix up the stack. USE_RTS just means we didn't - emit ENTER. */ - if (!cfun->machine->use_rts) - { - emit_move_insn (gen_rtx_REG (spmode, A0_REGNO), - gen_rtx_REG (spmode, FP_REGNO)); - emit_move_insn (gen_rtx_REG (spmode, SP_REGNO), - gen_rtx_REG (spmode, A0_REGNO)); - /* We can't just add this to the POPM because it would be in - the wrong order, and wouldn't fix the stack if we're bank - switching. */ - if (TARGET_A16) - emit_insn (gen_pophi_16 (gen_rtx_REG (HImode, FP_REGNO))); - else - emit_insn (gen_poppsi (gen_rtx_REG (PSImode, FP_REGNO))); - } - if (!bank_switch_p (cfun->decl) && cfun->machine->intr_pushm) - emit_insn (gen_popm (GEN_INT (cfun->machine->intr_pushm))); - - /* The FREIT (Fast REturn from InTerrupt) instruction should be - generated only for M32C/M32CM targets (generate the REIT - instruction otherwise). */ - if (fast_interrupt_p (cfun->decl)) - { - /* Check if fast_attribute is set for M32C or M32CM. */ - if (TARGET_A24) - { - emit_jump_insn (gen_epilogue_freit ()); - } - /* If fast_interrupt attribute is set for an R8C or M16C - target ignore this attribute and generated REIT - instruction. */ - else - { - warning (OPT_Wattributes, - "%<fast_interrupt%> attribute directive ignored"); - emit_jump_insn (gen_epilogue_reit_16 ()); - } - } - else if (TARGET_A16) - emit_jump_insn (gen_epilogue_reit_16 ()); - else - emit_jump_insn (gen_epilogue_reit_24 ()); - } - else if (cfun->machine->use_rts) - emit_jump_insn (gen_epilogue_rts ()); - else if (TARGET_A16) - emit_jump_insn (gen_epilogue_exitd_16 ()); - else - emit_jump_insn (gen_epilogue_exitd_24 ()); - emit_barrier (); -} - -void -m32c_emit_eh_epilogue (rtx ret_addr) -{ - /* R0[R2] has the stack adjustment. R1[R3] has the address to - return to. We have to fudge the stack, pop everything, pop SP - (fudged), and return (fudged). This is actually easier to do in - assembler, so punt to libgcc. */ - emit_jump_insn (gen_eh_epilogue (ret_addr, cfun->machine->eh_stack_adjust)); - /* emit_clobber (gen_rtx_REG (HImode, R0L_REGNO)); */ - emit_barrier (); -} - -/* Indicate which flags must be properly set for a given conditional. */ -static int -flags_needed_for_conditional (rtx cond) -{ - switch (GET_CODE (cond)) - { - case LE: - case GT: - return FLAGS_OSZ; - case LEU: - case GTU: - return FLAGS_ZC; - case LT: - case GE: - return FLAGS_OS; - case LTU: - case GEU: - return FLAGS_C; - case EQ: - case NE: - return FLAGS_Z; - default: - return FLAGS_N; - } -} - -#define DEBUG_CMP 0 - -/* Returns true if a compare insn is redundant because it would only - set flags that are already set correctly. */ -static bool -m32c_compare_redundant (rtx cmp, rtx *operands) -{ - int flags_needed; - int pflags; - rtx prev, pp, next; - rtx op0, op1; -#if DEBUG_CMP - int prev_icode, i; -#endif - - op0 = operands[0]; - op1 = operands[1]; - -#if DEBUG_CMP - fprintf(stderr, "\n\033[32mm32c_compare_redundant\033[0m\n"); - debug_rtx(cmp); - for (i=0; i<2; i++) - { - fprintf(stderr, "operands[%d] = ", i); - debug_rtx(operands[i]); - } -#endif - - next = next_nonnote_insn (cmp); - if (!next || !INSN_P (next)) - { -#if DEBUG_CMP - fprintf(stderr, "compare not followed by insn\n"); - debug_rtx(next); -#endif - return false; - } - if (GET_CODE (PATTERN (next)) == SET - && GET_CODE (XEXP ( PATTERN (next), 1)) == IF_THEN_ELSE) - { - next = XEXP (XEXP (PATTERN (next), 1), 0); - } - else if (GET_CODE (PATTERN (next)) == SET) - { - /* If this is a conditional, flags_needed will be something - other than FLAGS_N, which we test below. */ - next = XEXP (PATTERN (next), 1); - } - else - { -#if DEBUG_CMP - fprintf(stderr, "compare not followed by conditional\n"); - debug_rtx(next); -#endif - return false; - } -#if DEBUG_CMP - fprintf(stderr, "conditional is: "); - debug_rtx(next); -#endif - - flags_needed = flags_needed_for_conditional (next); - if (flags_needed == FLAGS_N) - { -#if DEBUG_CMP - fprintf(stderr, "compare not followed by conditional\n"); - debug_rtx(next); -#endif - return false; - } - - /* Compare doesn't set overflow and carry the same way that - arithmetic instructions do, so we can't replace those. */ - if (flags_needed & FLAGS_OC) - return false; - - prev = cmp; - do { - prev = prev_nonnote_insn (prev); - if (!prev) - { -#if DEBUG_CMP - fprintf(stderr, "No previous insn.\n"); -#endif - return false; - } - if (!INSN_P (prev)) - { -#if DEBUG_CMP - fprintf(stderr, "Previous insn is a non-insn.\n"); -#endif - return false; - } - pp = PATTERN (prev); - if (GET_CODE (pp) != SET) - { -#if DEBUG_CMP - fprintf(stderr, "Previous insn is not a SET.\n"); -#endif - return false; - } - pflags = get_attr_flags (prev); - - /* Looking up attributes of previous insns corrupted the recog - tables. */ - INSN_UID (cmp) = -1; - recog (PATTERN (cmp), cmp, 0); - - if (pflags == FLAGS_N - && reg_mentioned_p (op0, pp)) - { -#if DEBUG_CMP - fprintf(stderr, "intermediate non-flags insn uses op:\n"); - debug_rtx(prev); -#endif - return false; - } - - /* Check for comparisons against memory - between volatiles and - aliases, we just can't risk this one. */ - if (GET_CODE (operands[0]) == MEM - || GET_CODE (operands[0]) == MEM) - { -#if DEBUG_CMP - fprintf(stderr, "comparisons with memory:\n"); - debug_rtx(prev); -#endif - return false; - } - - /* Check for PREV changing a register that's used to compute a - value in CMP, even if it doesn't otherwise change flags. */ - if (GET_CODE (operands[0]) == REG - && rtx_referenced_p (SET_DEST (PATTERN (prev)), operands[0])) - { -#if DEBUG_CMP - fprintf(stderr, "sub-value affected, op0:\n"); - debug_rtx(prev); -#endif - return false; - } - if (GET_CODE (operands[1]) == REG - && rtx_referenced_p (SET_DEST (PATTERN (prev)), operands[1])) - { -#if DEBUG_CMP - fprintf(stderr, "sub-value affected, op1:\n"); - debug_rtx(prev); -#endif - return false; - } - - } while (pflags == FLAGS_N); -#if DEBUG_CMP - fprintf(stderr, "previous flag-setting insn:\n"); - debug_rtx(prev); - debug_rtx(pp); -#endif - - if (GET_CODE (pp) == SET - && GET_CODE (XEXP (pp, 0)) == REG - && REGNO (XEXP (pp, 0)) == FLG_REGNO - && GET_CODE (XEXP (pp, 1)) == COMPARE) - { - /* Adjacent cbranches must have the same operands to be - redundant. */ - rtx pop0 = XEXP (XEXP (pp, 1), 0); - rtx pop1 = XEXP (XEXP (pp, 1), 1); -#if DEBUG_CMP - fprintf(stderr, "adjacent cbranches\n"); - debug_rtx(pop0); - debug_rtx(pop1); -#endif - if (rtx_equal_p (op0, pop0) - && rtx_equal_p (op1, pop1)) - return true; -#if DEBUG_CMP - fprintf(stderr, "prev cmp not same\n"); -#endif - return false; - } - - /* Else the previous insn must be a SET, with either the source or - dest equal to operands[0], and operands[1] must be zero. */ - - if (!rtx_equal_p (op1, const0_rtx)) - { -#if DEBUG_CMP - fprintf(stderr, "operands[1] not const0_rtx\n"); -#endif - return false; - } - if (GET_CODE (pp) != SET) - { -#if DEBUG_CMP - fprintf (stderr, "pp not set\n"); -#endif - return false; - } - if (!rtx_equal_p (op0, SET_SRC (pp)) - && !rtx_equal_p (op0, SET_DEST (pp))) - { -#if DEBUG_CMP - fprintf(stderr, "operands[0] not found in set\n"); -#endif - return false; - } - -#if DEBUG_CMP - fprintf(stderr, "cmp flags %x prev flags %x\n", flags_needed, pflags); -#endif - if ((pflags & flags_needed) == flags_needed) - return true; - - return false; -} - -/* Return the pattern for a compare. This will be commented out if - the compare is redundant, else a normal pattern is returned. Thus, - the assembler output says where the compare would have been. */ -char * -m32c_output_compare (rtx insn, rtx *operands) -{ - static char templ[] = ";cmp.b\t%1,%0"; - /* ^ 5 */ - - templ[5] = " bwll"[GET_MODE_SIZE(GET_MODE(operands[0]))]; - if (m32c_compare_redundant (insn, operands)) - { -#if DEBUG_CMP - fprintf(stderr, "cbranch: cmp not needed\n"); -#endif - return templ; - } - -#if DEBUG_CMP - fprintf(stderr, "cbranch: cmp needed: `%s'\n", templ + 1); -#endif - return templ + 1; -} - -#undef TARGET_ENCODE_SECTION_INFO -#define TARGET_ENCODE_SECTION_INFO m32c_encode_section_info - -/* If the frame pointer isn't used, we detect it manually. But the - stack pointer doesn't have as flexible addressing as the frame - pointer, so we always assume we have it. */ - -#undef TARGET_FRAME_POINTER_REQUIRED -#define TARGET_FRAME_POINTER_REQUIRED hook_bool_void_true - -/* The Global `targetm' Variable. */ - -struct gcc_target targetm = TARGET_INITIALIZER; - -#include "gt-m32c.h" |