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authorDan Albert <danalbert@google.com>2015-06-17 11:09:54 -0700
committerDan Albert <danalbert@google.com>2015-06-17 14:15:22 -0700
commitf378ebf14df0952eae870c9865bab8326aa8f137 (patch)
tree31794503eb2a8c64ea5f313b93100f1163afcffb /gcc-4.6/gcc/config/m32c/m32c.c
parent2c58169824949d3a597d9fa81931e001ef9b1bd0 (diff)
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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.c4860
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"