diff options
Diffstat (limited to 'gcc-4.9/gcc/config/moxie/moxie.c')
| -rw-r--r-- | gcc-4.9/gcc/config/moxie/moxie.c | 614 |
1 files changed, 614 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/moxie/moxie.c b/gcc-4.9/gcc/config/moxie/moxie.c new file mode 100644 index 000000000..b646a432b --- /dev/null +++ b/gcc-4.9/gcc/config/moxie/moxie.c @@ -0,0 +1,614 @@ +/* Target Code for moxie + Copyright (C) 2008-2014 Free Software Foundation, Inc. + Contributed by Anthony Green. + + 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 "stor-layout.h" +#include "varasm.h" +#include "calls.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 "df.h" + +#define LOSE_AND_RETURN(msgid, x) \ + do \ + { \ + moxie_operand_lossage (msgid, x); \ + return; \ + } while (0) + +/* Worker function for TARGET_RETURN_IN_MEMORY. */ + +static bool +moxie_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) +{ + const HOST_WIDE_INT size = int_size_in_bytes (type); + return (size == -1 || size > 2 * UNITS_PER_WORD); +} + +/* Define how to find the value returned by a function. + VALTYPE is the data type of the value (as a tree). + If the precise function being called is known, FUNC is its + FUNCTION_DECL; otherwise, FUNC is 0. + + We always return values in register $r0 for moxie. */ + +static rtx +moxie_function_value (const_tree valtype, + const_tree fntype_or_decl ATTRIBUTE_UNUSED, + bool outgoing ATTRIBUTE_UNUSED) +{ + return gen_rtx_REG (TYPE_MODE (valtype), MOXIE_R0); +} + +/* Define how to find the value returned by a library function. + + We always return values in register $r0 for moxie. */ + +static rtx +moxie_libcall_value (enum machine_mode mode, + const_rtx fun ATTRIBUTE_UNUSED) +{ + return gen_rtx_REG (mode, MOXIE_R0); +} + +/* Handle TARGET_FUNCTION_VALUE_REGNO_P. + + We always return values in register $r0 for moxie. */ + +static bool +moxie_function_value_regno_p (const unsigned int regno) +{ + return (regno == MOXIE_R0); +} + +/* Emit an error message when we're in an asm, and a fatal error for + "normal" insns. Formatted output isn't easily implemented, since we + use output_operand_lossage to output the actual message and handle the + categorization of the error. */ + +static void +moxie_operand_lossage (const char *msgid, rtx op) +{ + debug_rtx (op); + output_operand_lossage ("%s", msgid); +} + +/* The PRINT_OPERAND_ADDRESS worker. */ + +void +moxie_print_operand_address (FILE *file, rtx x) +{ + switch (GET_CODE (x)) + { + case REG: + fprintf (file, "(%s)", reg_names[REGNO (x)]); + break; + + case PLUS: + switch (GET_CODE (XEXP (x, 1))) + { + case CONST_INT: + fprintf (file, "%ld(%s)", + INTVAL(XEXP (x, 1)), reg_names[REGNO (XEXP (x, 0))]); + break; + case SYMBOL_REF: + output_addr_const (file, XEXP (x, 1)); + fprintf (file, "(%s)", reg_names[REGNO (XEXP (x, 0))]); + break; + case CONST: + { + rtx plus = XEXP (XEXP (x, 1), 0); + if (GET_CODE (XEXP (plus, 0)) == SYMBOL_REF + && CONST_INT_P (XEXP (plus, 1))) + { + output_addr_const(file, XEXP (plus, 0)); + fprintf (file,"+%ld(%s)", INTVAL (XEXP (plus, 1)), + reg_names[REGNO (XEXP (x, 0))]); + } + else + abort(); + } + break; + default: + abort(); + } + break; + + default: + output_addr_const (file, x); + break; + } +} + +/* The PRINT_OPERAND worker. */ + +void +moxie_print_operand (FILE *file, rtx x, int code) +{ + rtx operand = x; + + /* New code entries should just be added to the switch below. If + handling is finished, just return. If handling was just a + modification of the operand, the modified operand should be put in + "operand", and then do a break to let default handling + (zero-modifier) output the operand. */ + + switch (code) + { + case 0: + /* No code, print as usual. */ + break; + + default: + LOSE_AND_RETURN ("invalid operand modifier letter", x); + } + + /* Print an operand as without a modifier letter. */ + switch (GET_CODE (operand)) + { + case REG: + if (REGNO (operand) > MOXIE_R13) + internal_error ("internal error: bad register: %d", REGNO (operand)); + fprintf (file, "%s", reg_names[REGNO (operand)]); + return; + + case MEM: + output_address (XEXP (operand, 0)); + return; + + default: + /* No need to handle all strange variants, let output_addr_const + do it for us. */ + if (CONSTANT_P (operand)) + { + output_addr_const (file, operand); + return; + } + + LOSE_AND_RETURN ("unexpected operand", x); + } +} + +/* Per-function machine data. */ +struct GTY(()) machine_function + { + /* Number of bytes saved on the stack for callee saved registers. */ + int callee_saved_reg_size; + + /* Number of bytes saved on the stack for local variables. */ + int local_vars_size; + + /* The sum of 2 sizes: locals vars and padding byte for saving the + * registers. Used in expand_prologue () and expand_epilogue(). */ + int size_for_adjusting_sp; + }; + +/* Zero initialization is OK for all current fields. */ + +static struct machine_function * +moxie_init_machine_status (void) +{ + return ggc_alloc_cleared_machine_function (); +} + + +/* The TARGET_OPTION_OVERRIDE worker. + All this curently does is set init_machine_status. */ +static void +moxie_option_override (void) +{ + /* Set the per-function-data initializer. */ + init_machine_status = moxie_init_machine_status; +} + +/* Compute the size of the local area and the size to be adjusted by the + * prologue and epilogue. */ + +static void +moxie_compute_frame (void) +{ + /* For aligning the local variables. */ + int stack_alignment = STACK_BOUNDARY / BITS_PER_UNIT; + int padding_locals; + int regno; + + /* Padding needed for each element of the frame. */ + cfun->machine->local_vars_size = get_frame_size (); + + /* Align to the stack alignment. */ + padding_locals = cfun->machine->local_vars_size % stack_alignment; + if (padding_locals) + padding_locals = stack_alignment - padding_locals; + + cfun->machine->local_vars_size += padding_locals; + + cfun->machine->callee_saved_reg_size = 0; + + /* Save callee-saved registers. */ + for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) + if (df_regs_ever_live_p (regno) && (! call_used_regs[regno])) + cfun->machine->callee_saved_reg_size += 4; + + cfun->machine->size_for_adjusting_sp = + crtl->args.pretend_args_size + + cfun->machine->local_vars_size + + (ACCUMULATE_OUTGOING_ARGS ? crtl->outgoing_args_size : 0); +} + +void +moxie_expand_prologue (void) +{ + int regno; + rtx insn; + + moxie_compute_frame (); + + if (flag_stack_usage_info) + current_function_static_stack_size = cfun->machine->size_for_adjusting_sp; + + /* Save callee-saved registers. */ + for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) + { + if (!fixed_regs[regno] && df_regs_ever_live_p (regno) && !call_used_regs[regno]) + { + insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno))); + RTX_FRAME_RELATED_P (insn) = 1; + } + } + + if (cfun->machine->size_for_adjusting_sp > 0) + { + int i = cfun->machine->size_for_adjusting_sp; + while ((i >= 255) && (i <= 510)) + { + insn = emit_insn (gen_subsi3 (stack_pointer_rtx, + stack_pointer_rtx, + GEN_INT (255))); + RTX_FRAME_RELATED_P (insn) = 1; + i -= 255; + } + if (i <= 255) + { + insn = emit_insn (gen_subsi3 (stack_pointer_rtx, + stack_pointer_rtx, + GEN_INT (i))); + RTX_FRAME_RELATED_P (insn) = 1; + } + else + { + rtx reg = gen_rtx_REG (SImode, MOXIE_R12); + insn = emit_move_insn (reg, GEN_INT (i)); + RTX_FRAME_RELATED_P (insn) = 1; + insn = emit_insn (gen_subsi3 (stack_pointer_rtx, + stack_pointer_rtx, + reg)); + RTX_FRAME_RELATED_P (insn) = 1; + } + } +} + +void +moxie_expand_epilogue (void) +{ + int regno; + rtx reg; + + if (cfun->machine->callee_saved_reg_size != 0) + { + reg = gen_rtx_REG (Pmode, MOXIE_R12); + if (cfun->machine->callee_saved_reg_size <= 255) + { + emit_move_insn (reg, hard_frame_pointer_rtx); + emit_insn (gen_subsi3 + (reg, reg, + GEN_INT (cfun->machine->callee_saved_reg_size))); + } + else + { + emit_move_insn (reg, + GEN_INT (-cfun->machine->callee_saved_reg_size)); + emit_insn (gen_addsi3 (reg, reg, hard_frame_pointer_rtx)); + } + for (regno = FIRST_PSEUDO_REGISTER; regno-- > 0; ) + if (!fixed_regs[regno] && !call_used_regs[regno] + && df_regs_ever_live_p (regno)) + { + rtx preg = gen_rtx_REG (Pmode, regno); + emit_insn (gen_movsi_pop (reg, preg)); + } + } + + emit_jump_insn (gen_returner ()); +} + +/* Implements the macro INITIAL_ELIMINATION_OFFSET, return the OFFSET. */ + +int +moxie_initial_elimination_offset (int from, int to) +{ + int ret; + + if ((from) == FRAME_POINTER_REGNUM && (to) == HARD_FRAME_POINTER_REGNUM) + { + /* Compute this since we need to use cfun->machine->local_vars_size. */ + moxie_compute_frame (); + ret = -cfun->machine->callee_saved_reg_size; + } + else if ((from) == ARG_POINTER_REGNUM && (to) == HARD_FRAME_POINTER_REGNUM) + ret = 0x00; + else + abort (); + + return ret; +} + +/* Worker function for TARGET_SETUP_INCOMING_VARARGS. */ + +static void +moxie_setup_incoming_varargs (cumulative_args_t cum_v, + enum machine_mode mode ATTRIBUTE_UNUSED, + tree type ATTRIBUTE_UNUSED, + int *pretend_size, int no_rtl) +{ + CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); + int regno; + int regs = 8 - *cum; + + *pretend_size = regs < 0 ? 0 : GET_MODE_SIZE (SImode) * regs; + + if (no_rtl) + return; + + for (regno = *cum; regno < 8; regno++) + { + rtx reg = gen_rtx_REG (SImode, regno); + rtx slot = gen_rtx_PLUS (Pmode, + gen_rtx_REG (SImode, ARG_POINTER_REGNUM), + GEN_INT (UNITS_PER_WORD * (3 + (regno-2)))); + + emit_move_insn (gen_rtx_MEM (SImode, slot), reg); + } +} + + +/* Return the fixed registers used for condition codes. */ + +static bool +moxie_fixed_condition_code_regs (unsigned int *p1, unsigned int *p2) +{ + *p1 = CC_REG; + *p2 = INVALID_REGNUM; + return true; +} + +/* Return the next register to be used to hold a function argument or + NULL_RTX if there's no more space. */ + +static rtx +moxie_function_arg (cumulative_args_t cum_v, enum machine_mode mode, + const_tree type ATTRIBUTE_UNUSED, + bool named ATTRIBUTE_UNUSED) +{ + CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); + + if (*cum < 8) + return gen_rtx_REG (mode, *cum); + else + return NULL_RTX; +} + +#define MOXIE_FUNCTION_ARG_SIZE(MODE, TYPE) \ + ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \ + : (unsigned) int_size_in_bytes (TYPE)) + +static void +moxie_function_arg_advance (cumulative_args_t cum_v, enum machine_mode mode, + const_tree type, bool named ATTRIBUTE_UNUSED) +{ + CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); + + *cum = (*cum < MOXIE_R6 + ? *cum + ((3 + MOXIE_FUNCTION_ARG_SIZE (mode, type)) / 4) + : *cum); +} + +/* Return non-zero if the function argument described by TYPE is to be + passed by reference. */ + +static bool +moxie_pass_by_reference (cumulative_args_t cum ATTRIBUTE_UNUSED, + enum machine_mode mode, const_tree type, + bool named ATTRIBUTE_UNUSED) +{ + unsigned HOST_WIDE_INT size; + + if (type) + { + if (AGGREGATE_TYPE_P (type)) + return true; + size = int_size_in_bytes (type); + } + else + size = GET_MODE_SIZE (mode); + + return size > 4*6; +} + +/* Some function arguments will only partially fit in the registers + that hold arguments. Given a new arg, return the number of bytes + that fit in argument passing registers. */ + +static int +moxie_arg_partial_bytes (cumulative_args_t cum_v, + enum machine_mode mode, + tree type, bool named) +{ + CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); + int bytes_left, size; + + if (*cum >= 8) + return 0; + + if (moxie_pass_by_reference (cum_v, mode, type, named)) + size = 4; + else if (type) + { + if (AGGREGATE_TYPE_P (type)) + return 0; + size = int_size_in_bytes (type); + } + else + size = GET_MODE_SIZE (mode); + + bytes_left = (4 * 6) - ((*cum - 2) * 4); + + if (size > bytes_left) + return bytes_left; + else + return 0; +} + +/* Worker function for TARGET_STATIC_CHAIN. */ + +static rtx +moxie_static_chain (const_tree fndecl, bool incoming_p) +{ + rtx addr, mem; + + if (!DECL_STATIC_CHAIN (fndecl)) + return NULL; + + if (incoming_p) + addr = plus_constant (Pmode, arg_pointer_rtx, 2 * UNITS_PER_WORD); + else + addr = plus_constant (Pmode, stack_pointer_rtx, -UNITS_PER_WORD); + + mem = gen_rtx_MEM (Pmode, addr); + MEM_NOTRAP_P (mem) = 1; + + return mem; +} + +/* Worker function for TARGET_ASM_TRAMPOLINE_TEMPLATE. */ + +static void +moxie_asm_trampoline_template (FILE *f) +{ + fprintf (f, "\tpush $sp, $r0\n"); + fprintf (f, "\tldi.l $r0, 0x0\n"); + fprintf (f, "\tsto.l 0x8($fp), $r0\n"); + fprintf (f, "\tpop $sp, $r0\n"); + fprintf (f, "\tnop\n"); + fprintf (f, "\tjmpa 0x0\n"); +} + +/* Worker function for TARGET_TRAMPOLINE_INIT. */ + +static void +moxie_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value) +{ + rtx mem, fnaddr = XEXP (DECL_RTL (fndecl), 0); + + emit_block_move (m_tramp, assemble_trampoline_template (), + GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); + + mem = adjust_address (m_tramp, SImode, 4); + emit_move_insn (mem, chain_value); + mem = adjust_address (m_tramp, SImode, 20); + emit_move_insn (mem, fnaddr); +} + +/* The Global `targetm' Variable. */ + +/* Initialize the GCC target structure. */ + +#undef TARGET_PROMOTE_PROTOTYPES +#define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true + +#undef TARGET_RETURN_IN_MEMORY +#define TARGET_RETURN_IN_MEMORY moxie_return_in_memory +#undef TARGET_MUST_PASS_IN_STACK +#define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size +#undef TARGET_PASS_BY_REFERENCE +#define TARGET_PASS_BY_REFERENCE moxie_pass_by_reference +#undef TARGET_ARG_PARTIAL_BYTES +#define TARGET_ARG_PARTIAL_BYTES moxie_arg_partial_bytes +#undef TARGET_FUNCTION_ARG +#define TARGET_FUNCTION_ARG moxie_function_arg +#undef TARGET_FUNCTION_ARG_ADVANCE +#define TARGET_FUNCTION_ARG_ADVANCE moxie_function_arg_advance + + +#undef TARGET_SETUP_INCOMING_VARARGS +#define TARGET_SETUP_INCOMING_VARARGS moxie_setup_incoming_varargs + +#undef TARGET_FIXED_CONDITION_CODE_REGS +#define TARGET_FIXED_CONDITION_CODE_REGS moxie_fixed_condition_code_regs + +/* Define this to return an RTX representing the place where a + function returns or receives a value of data type RET_TYPE, a tree + node node representing a data type. */ +#undef TARGET_FUNCTION_VALUE +#define TARGET_FUNCTION_VALUE moxie_function_value +#undef TARGET_LIBCALL_VALUE +#define TARGET_LIBCALL_VALUE moxie_libcall_value +#undef TARGET_FUNCTION_VALUE_REGNO_P +#define TARGET_FUNCTION_VALUE_REGNO_P moxie_function_value_regno_p + +#undef TARGET_FRAME_POINTER_REQUIRED +#define TARGET_FRAME_POINTER_REQUIRED hook_bool_void_true + +#undef TARGET_STATIC_CHAIN +#define TARGET_STATIC_CHAIN moxie_static_chain +#undef TARGET_ASM_TRAMPOLINE_TEMPLATE +#define TARGET_ASM_TRAMPOLINE_TEMPLATE moxie_asm_trampoline_template +#undef TARGET_TRAMPOLINE_INIT +#define TARGET_TRAMPOLINE_INIT moxie_trampoline_init + +#undef TARGET_OPTION_OVERRIDE +#define TARGET_OPTION_OVERRIDE moxie_option_override + +struct gcc_target targetm = TARGET_INITIALIZER; + +#include "gt-moxie.h" |