+++ /dev/null
-/* Subroutines used for code generation on ROMP.
- Copyright (C) 1990, 1991, 1992, 1993, 1997, 1998, 1999, 2000, 2002
- Free Software Foundation, Inc.
- Contributed by Richard Kenner (kenner@nyu.edu)
-
-This file is part of GNU CC.
-
-GNU CC 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 2, or (at your option)
-any later version.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-
-#include "config.h"
-#include "system.h"
-#include "rtl.h"
-#include "regs.h"
-#include "hard-reg-set.h"
-#include "real.h"
-#include "insn-config.h"
-#include "conditions.h"
-#include "output.h"
-#include "insn-attr.h"
-#include "flags.h"
-#include "recog.h"
-#include "obstack.h"
-#include "tree.h"
-#include "function.h"
-#include "expr.h"
-#include "toplev.h"
-#include "tm_p.h"
-#include "target.h"
-#include "target-def.h"
-
-#define min(A,B) ((A) < (B) ? (A) : (B))
-#define max(A,B) ((A) > (B) ? (A) : (B))
-
-static int unsigned_comparisons_p PARAMS ((rtx));
-static void output_loadsave_fpregs PARAMS ((FILE *, enum rtx_code, rtx));
-static void output_fpops PARAMS ((FILE *));
-static void init_fpops PARAMS ((void));
-static int memory_offset_in_range_p PARAMS ((rtx, enum machine_mode, int, int));
-static unsigned int hash_rtx PARAMS ((rtx));
-static void romp_output_function_prologue PARAMS ((FILE *, HOST_WIDE_INT));
-static void romp_output_function_epilogue PARAMS ((FILE *, HOST_WIDE_INT));
-\f
-/* Initialize the GCC target structure. */
-#undef TARGET_ASM_FUNCTION_PROLOGUE
-#define TARGET_ASM_FUNCTION_PROLOGUE romp_output_function_prologue
-#undef TARGET_ASM_FUNCTION_EPILOGUE
-#define TARGET_ASM_FUNCTION_EPILOGUE romp_output_function_epilogue
-
-struct gcc_target targetm = TARGET_INITIALIZER;
-\f
-/* Return 1 if the insn using CC0 set by INSN does not contain
- any unsigned tests applied to the condition codes.
-
- Based on `next_insn_tests_no_inequality' in recog.c. */
-
-int
-next_insn_tests_no_unsigned (insn)
- rtx insn;
-{
- register rtx next = next_cc0_user (insn);
-
- if (next == 0)
- {
- if (find_reg_note (insn, REG_UNUSED, cc0_rtx))
- return 1;
- else
- abort ();
- }
-
- return ((GET_CODE (next) == JUMP_INSN
- || GET_CODE (next) == INSN
- || GET_CODE (next) == CALL_INSN)
- && ! unsigned_comparisons_p (PATTERN (next)));
-}
-
-static int
-unsigned_comparisons_p (x)
- rtx x;
-{
- register const char *fmt;
- register int len, i;
- register enum rtx_code code = GET_CODE (x);
-
- switch (code)
- {
- case REG:
- case PC:
- case CC0:
- case CONST_INT:
- case CONST_DOUBLE:
- case CONST:
- case LABEL_REF:
- case SYMBOL_REF:
- return 0;
-
- case LTU:
- case GTU:
- case LEU:
- case GEU:
- return (XEXP (x, 0) == cc0_rtx || XEXP (x, 1) == cc0_rtx);
- default:
- break;
- }
-
- len = GET_RTX_LENGTH (code);
- fmt = GET_RTX_FORMAT (code);
-
- for (i = 0; i < len; i++)
- {
- if (fmt[i] == 'e')
- {
- if (unsigned_comparisons_p (XEXP (x, i)))
- return 1;
- }
- else if (fmt[i] == 'E')
- {
- register int j;
- for (j = XVECLEN (x, i) - 1; j >= 0; j--)
- if (unsigned_comparisons_p (XVECEXP (x, i, j)))
- return 1;
- }
- }
-
- return 0;
-}
-\f
-/* Update the condition code from the insn. Look mostly at the first
- byte of the machine-specific insn description information.
-
- cc_state.value[12] refer to two possible values that might correspond
- to the CC. We only store register values. */
-
-void
-update_cc (body, insn)
- rtx body ATTRIBUTE_UNUSED;
- rtx insn;
-{
- switch (get_attr_cc (insn))
- {
- case CC_NONE:
- /* Insn does not affect the CC at all. */
- break;
-
- case CC_CHANGE0:
- /* Insn doesn't affect the CC but does modify operand[0], known to be
- a register. */
- if (cc_status.value1 != 0
- && reg_overlap_mentioned_p (recog_data.operand[0], cc_status.value1))
- cc_status.value1 = 0;
-
- if (cc_status.value2 != 0
- && reg_overlap_mentioned_p (recog_data.operand[0], cc_status.value2))
- cc_status.value2 = 0;
-
- break;
-
- case CC_COPY1TO0:
- /* Insn copies operand[1] to operand[0], both registers, but doesn't
- affect the CC. */
- if (cc_status.value1 != 0
- && reg_overlap_mentioned_p (recog_data.operand[0], cc_status.value1))
- cc_status.value1 = 0;
-
- if (cc_status.value2 != 0
- && reg_overlap_mentioned_p (recog_data.operand[0], cc_status.value2))
- cc_status.value2 = 0;
-
- if (cc_status.value1 != 0
- && rtx_equal_p (cc_status.value1, recog_data.operand[1]))
- cc_status.value2 = recog_data.operand[0];
-
- if (cc_status.value2 != 0
- && rtx_equal_p (cc_status.value2, recog_data.operand[1]))
- cc_status.value1 = recog_data.operand[0];
-
- break;
-
- case CC_CLOBBER:
- /* Insn clobbers CC. */
- CC_STATUS_INIT;
- break;
-
- case CC_SETS:
- /* Insn sets CC to recog_data.operand[0], but overflow is impossible. */
- CC_STATUS_INIT;
- cc_status.flags |= CC_NO_OVERFLOW;
- cc_status.value1 = recog_data.operand[0];
- break;
-
- case CC_COMPARE:
- /* Insn is a compare which sets the CC fully. Update CC_STATUS for this
- compare and mark whether the test will be signed or unsigned. */
- {
- register rtx p = PATTERN (insn);
-
- CC_STATUS_INIT;
-
- if (GET_CODE (p) == PARALLEL)
- p = XVECEXP (p, 0, 0);
- cc_status.value1 = SET_SRC (p);
-
- if (GET_CODE (SET_SRC (p)) == REG)
- cc_status.flags |= CC_NO_OVERFLOW;
- if (! next_insn_tests_no_unsigned (insn))
- cc_status.flags |= CC_UNSIGNED;
- }
- break;
-
- case CC_TBIT:
- /* Insn sets T bit if result is non-zero. Next insn must be branch. */
- CC_STATUS_INIT;
- cc_status.flags = CC_IN_TB | CC_NOT_NEGATIVE;
- break;
-
- default:
- abort ();
- }
-}
-
-/* Return 1 if a previous compare needs to be re-issued. This will happen
- if two compares tested the same objects, but one was signed and the
- other unsigned. OP is the comparison operation being performed. */
-
-int
-restore_compare_p (op)
- rtx op;
-{
- enum rtx_code code = GET_CODE (op);
-
- return (((code == GEU || code == LEU || code == GTU || code == LTU)
- && ! (cc_status.flags & CC_UNSIGNED))
- || ((code == GE || code == LE || code == GT || code == LT)
- && (cc_status.flags & CC_UNSIGNED)));
-}
-\f
-/* Generate the (long) string corresponding to an inline multiply insn.
- Note that `r10' does not refer to the register r10, but rather to the
- SCR used as the MQ. */
-const char *
-output_in_line_mul ()
-{
- static char insns[200];
- int i;
-
- strcpy (insns, "s %0,%0\n");
- strcat (insns, "\tmts r10,%1\n");
- for (i = 0; i < 16; i++)
- strcat (insns, "\tm %0,%2\n");
- strcat (insns, "\tmfs r10,%0");
-
- return insns;
-}
-\f
-/* Returns 1 if OP is a memory reference with an offset from a register within
- the range specified. The offset must also be a multiple of the size of the
- mode. */
-
-static int
-memory_offset_in_range_p (op, mode, low, high)
- register rtx op;
- enum machine_mode mode;
- int low, high;
-{
- int offset = 0;
-
- if (! memory_operand (op, mode))
- return 0;
-
- while (GET_CODE (op) == SUBREG)
- {
- offset += SUBREG_BYTE (op);
- op = SUBREG_REG (op);
- }
-
- /* We must now have either (mem (reg (x)), (mem (plus (reg (x)) (c))),
- or a constant pool address. */
- if (GET_CODE (op) != MEM)
- abort ();
-
- /* Now use the actual mode and get the address. */
- mode = GET_MODE (op);
- op = XEXP (op, 0);
- if (GET_CODE (op) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (op))
- offset = get_pool_offset (op) + 12;
- else if (GET_CODE (op) == PLUS)
- {
- if (GET_CODE (XEXP (op, 1)) != CONST_INT
- || ! register_operand (XEXP (op, 0), Pmode))
- return 0;
-
- offset += INTVAL (XEXP (op, 1));
- }
-
- else if (! register_operand (op, Pmode))
- return 0;
-
- return (offset >= low && offset <= high
- && (offset % GET_MODE_SIZE (mode) == 0));
-}
-
-/* Return 1 if OP is a valid operand for a memory reference insn that can
- only reference indirect through a register. */
-
-int
-zero_memory_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- return memory_offset_in_range_p (op, mode, 0, 0);
-}
-
-/* Return 1 if OP is a valid operand for a `short' memory reference insn. */
-
-int
-short_memory_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- if (mode == VOIDmode)
- mode = GET_MODE (op);
-
- return memory_offset_in_range_p (op, mode, 0,
- 15 * min (UNITS_PER_WORD,
- GET_MODE_SIZE (mode)));
-}
-
-/* Returns 1 if OP is a memory reference involving a symbolic constant
- that is not in the constant pool. */
-
-int
-symbolic_memory_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (! memory_operand (op, mode))
- return 0;
-
- while (GET_CODE (op) == SUBREG)
- op = SUBREG_REG (op);
-
- if (GET_CODE (op) != MEM)
- abort ();
-
- op = XEXP (op, 0);
- if (constant_pool_address_operand (op, VOIDmode))
- return 0;
- else
- return romp_symbolic_operand (op, Pmode)
- || (GET_CODE (op) == PLUS && register_operand (XEXP (op, 0), Pmode)
- && romp_symbolic_operand (XEXP (op, 1), Pmode));
-}
-
-
-/* Returns 1 if OP is a constant pool reference to the current function. */
-
-int
-current_function_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- if (GET_CODE (op) != MEM || GET_CODE (XEXP (op, 0)) != SYMBOL_REF
- || ! CONSTANT_POOL_ADDRESS_P (XEXP (op, 0)))
- return 0;
-
- op = get_pool_constant (XEXP (op, 0));
- return (GET_CODE (op) == SYMBOL_REF
- && ! strcmp (current_function_name, XSTR (op, 0)));
-}
-
-/* Return non-zero if this function is known to have a null epilogue. */
-
-int
-null_epilogue ()
-{
- return (reload_completed
- && first_reg_to_save () == 16
- && ! romp_pushes_stack ());
-}
-\f
-/* Returns 1 if OP is the address of a location in the constant pool. */
-
-int
-constant_pool_address_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- return ((GET_CODE (op) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (op))
- || (GET_CODE (op) == CONST && GET_CODE (XEXP (op, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT
- && GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
- && CONSTANT_POOL_ADDRESS_P (XEXP (XEXP (op, 0), 0))));
-}
-
-/* Returns 1 if OP is either a symbol reference or a sum of a symbol
- reference and a constant. */
-
-int
-romp_symbolic_operand (op, mode)
- register rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- switch (GET_CODE (op))
- {
- case SYMBOL_REF:
- case LABEL_REF:
- return ! op->integrated;
-
- case CONST:
- op = XEXP (op, 0);
- return (GET_CODE (XEXP (op, 0)) == SYMBOL_REF
- || GET_CODE (XEXP (op, 0)) == LABEL_REF)
- && GET_CODE (XEXP (op, 1)) == CONST_INT;
-
- default:
- return 0;
- }
-}
-
-/* Returns 1 if OP is a valid constant for the ROMP. */
-
-int
-constant_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- switch (GET_CODE (op))
- {
- case LABEL_REF:
- case SYMBOL_REF:
- case PLUS:
- case CONST:
- return romp_symbolic_operand (op,mode);
-
- case CONST_INT:
- return (unsigned int) (INTVAL (op) + 0x8000) < 0x10000
- || (INTVAL (op) & 0xffff) == 0 || (INTVAL (op) & 0xffff0000) == 0;
-
- default:
- return 0;
- }
-}
-
-/* Returns 1 if OP is either a constant integer valid for the ROMP or a
- register. If a register, it must be in the proper mode unless MODE is
- VOIDmode. */
-
-int
-reg_or_cint_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (GET_CODE (op) == CONST_INT)
- return constant_operand (op, mode);
-
- return register_operand (op, mode);
-}
-
-/* Return 1 is the operand is either a register or ANY constant integer. */
-
-int
-reg_or_any_cint_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- return GET_CODE (op) == CONST_INT || register_operand (op, mode);
-}
-
-/* Return 1 if the operand is either a register or a valid D-type operand. */
-
-int
-reg_or_D_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (GET_CODE (op) == CONST_INT)
- return (unsigned) (INTVAL (op) + 0x8000) < 0x10000;
-
- return register_operand (op, mode);
-}
-
-/* Return 1 if the operand is either a register or an item that can be
- used as the operand of an SI add insn. */
-
-int
-reg_or_add_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- return reg_or_D_operand (op, mode) || romp_symbolic_operand (op, mode)
- || (GET_CODE (op) == CONST_INT && (INTVAL (op) & 0xffff) == 0);
-}
-
-/* Return 1 if the operand is either a register or an item that can be
- used as the operand of a ROMP logical AND insn. */
-
-int
-reg_or_and_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (reg_or_cint_operand (op, mode))
- return 1;
-
- if (GET_CODE (op) != CONST_INT)
- return 0;
-
- return (INTVAL (op) & 0xffff) == 0xffff
- || (INTVAL (op) & 0xffff0000) == 0xffff0000;
-}
-
-/* Return 1 if the operand is a register or memory operand. */
-
-int
-reg_or_mem_operand (op, mode)
- register rtx op;
- register enum machine_mode mode;
-{
- return register_operand (op, mode) || memory_operand (op, mode);
-}
-
-/* Return 1 if the operand is either a register or a memory operand that is
- not symbolic. */
-
-int
-reg_or_nonsymb_mem_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (register_operand (op, mode))
- return 1;
-
- if (memory_operand (op, mode) && ! symbolic_memory_operand (op, mode))
- return 1;
-
- return 0;
-}
-
-/* Return 1 if this operand is valid for the ROMP. This is any operand except
- certain constant integers. */
-
-int
-romp_operand (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (GET_CODE (op) == CONST_INT)
- return constant_operand (op, mode);
-
- return general_operand (op, mode);
-}
-
-/* Return 1 if the operand is (reg:mode 0). */
-
-int
-reg_0_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- return ((mode == VOIDmode || mode == GET_MODE (op))
- && GET_CODE (op) == REG && REGNO (op) == 0);
-}
-
-/* Return 1 if the operand is (reg:mode 15). */
-
-int
-reg_15_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- return ((mode == VOIDmode || mode == GET_MODE (op))
- && GET_CODE (op) == REG && REGNO (op) == 15);
-}
-\f
-/* Return 1 if this is a binary floating-point operation. */
-
-int
-float_binary (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (mode != VOIDmode && mode != GET_MODE (op))
- return 0;
-
- if (GET_MODE (op) != SFmode && GET_MODE (op) != DFmode)
- return 0;
-
- switch (GET_CODE (op))
- {
- case PLUS:
- case MINUS:
- case MULT:
- case DIV:
- return GET_MODE (XEXP (op, 0)) == GET_MODE (op)
- && GET_MODE (XEXP (op, 1)) == GET_MODE (op);
-
- default:
- return 0;
- }
-}
-
-/* Return 1 if this is a unary floating-point operation. */
-
-int
-float_unary (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (mode != VOIDmode && mode != GET_MODE (op))
- return 0;
-
- if (GET_MODE (op) != SFmode && GET_MODE (op) != DFmode)
- return 0;
-
- return (GET_CODE (op) == NEG || GET_CODE (op) == ABS)
- && GET_MODE (XEXP (op, 0)) == GET_MODE (op);
-}
-
-/* Return 1 if this is a valid floating-point conversion that can be done
- as part of an operation by the RT floating-point routines. */
-
-int
-float_conversion (op, mode)
- register rtx op;
- enum machine_mode mode;
-{
- if (mode != VOIDmode && mode != GET_MODE (op))
- return 0;
-
- switch (GET_CODE (op))
- {
- case FLOAT_TRUNCATE:
- return GET_MODE (op) == SFmode && GET_MODE (XEXP (op, 0)) == DFmode;
-
- case FLOAT_EXTEND:
- return GET_MODE (op) == DFmode && GET_MODE (XEXP (op, 0)) == SFmode;
-
- case FLOAT:
- return ((GET_MODE (XEXP (op, 0)) == SImode
- || GET_CODE (XEXP (op, 0)) == CONST_INT)
- && (GET_MODE (op) == SFmode || GET_MODE (op) == DFmode));
-
- case FIX:
- return ((GET_MODE (op) == SImode
- || GET_CODE (XEXP (op, 0)) == CONST_INT)
- && (GET_MODE (XEXP (op, 0)) == SFmode
- || GET_MODE (XEXP (op, 0)) == DFmode));
-
- default:
- return 0;
- }
-}
-\f
-/* Print an operand. Recognize special options, documented below. */
-
-void
-print_operand (file, x, code)
- FILE *file;
- rtx x;
- int code;
-{
- int i;
-
- switch (code)
- {
- case 'B':
- /* Byte number (const/8) */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%B value");
-
- fprintf (file, "%d", INTVAL (x) / 8);
- break;
-
- case 'L':
- /* Low order 16 bits of constant. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%L value");
-
- fprintf (file, "%d", INTVAL (x) & 0xffff);
- break;
-
- case 's':
- /* Null or "16" depending on whether the constant is greater than 16. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%s value");
-
- if (INTVAL (x) >= 16)
- fprintf (file, "16");
-
- break;
-
- case 'S':
- /* For shifts: 's' will have given the half. Just give the amount
- within 16. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%S value");
-
- fprintf (file, "%d", INTVAL (x) & 15);
- break;
-
- case 'b':
- /* The number of a single bit set or cleared, mod 16. Note that the ROMP
- numbers bits with the high-order bit 31. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%b value");
-
- if ((i = exact_log2 (INTVAL (x))) >= 0)
- fprintf (file, "%d", (31 - i) % 16);
- else if ((i = exact_log2 (~ INTVAL (x))) >= 0)
- fprintf (file, "%d", (31 - i) % 16);
- else
- output_operand_lossage ("invalid %%b value");
-
- break;
-
- case 'h':
- /* "l" or "u" depending on which half of the constant is zero. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%h value");
-
- if ((INTVAL (x) & 0xffff0000) == 0)
- fprintf (file, "l");
- else if ((INTVAL (x) & 0xffff) == 0)
- fprintf (file, "u");
- else
- output_operand_lossage ("invalid %%h value");
-
- break;
-
- case 'H':
- /* Upper or lower half, depending on which half is zero. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%H value");
-
- if ((INTVAL (x) & 0xffff0000) == 0)
- fprintf (file, "%d", INTVAL (x) & 0xffff);
- else if ((INTVAL (x) & 0xffff) == 0)
- fprintf (file, "%d", (INTVAL (x) >> 16) & 0xffff);
- else
- output_operand_lossage ("invalid %%H value");
-
- break;
-
- case 'z':
- /* Write two characters:
- 'lo' if the high order part is all ones
- 'lz' if the high order part is all zeros
- 'uo' if the low order part is all ones
- 'uz' if the low order part is all zeros
- */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%z value");
-
- if ((INTVAL (x) & 0xffff0000) == 0)
- fprintf (file, "lz");
- else if ((INTVAL (x) & 0xffff0000) == 0xffff0000)
- fprintf (file, "lo");
- else if ((INTVAL (x) & 0xffff) == 0)
- fprintf (file, "uz");
- else if ((INTVAL (x) & 0xffff) == 0xffff)
- fprintf (file, "uo");
- else
- output_operand_lossage ("invalid %%z value");
-
- break;
-
- case 'Z':
- /* Upper or lower half, depending on which is non-zero or not
- all ones. Must be consistent with 'z' above. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%Z value");
-
- if ((INTVAL (x) & 0xffff0000) == 0
- || (INTVAL (x) & 0xffff0000) == 0xffff0000)
- fprintf (file, "%d", INTVAL (x) & 0xffff);
- else if ((INTVAL (x) & 0xffff) == 0 || (INTVAL (x) & 0xffff) == 0xffff)
- fprintf (file, "%d", (INTVAL (x) >> 16) & 0xffff);
- else
- output_operand_lossage ("invalid %%Z value");
-
- break;
-
- case 'k':
- /* Same as 'z', except the trailing 'o' or 'z' is not written. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%k value");
-
- if ((INTVAL (x) & 0xffff0000) == 0
- || (INTVAL (x) & 0xffff0000) == 0xffff0000)
- fprintf (file, "l");
- else if ((INTVAL (x) & 0xffff) == 0
- || (INTVAL (x) & 0xffff) == 0xffff)
- fprintf (file, "u");
- else
- output_operand_lossage ("invalid %%k value");
-
- break;
-
- case 't':
- /* Similar to 's', except that we write 'h' or 'u'. */
- if (GET_CODE (x) != CONST_INT)
- output_operand_lossage ("invalid %%k value");
-
- if (INTVAL (x) < 16)
- fprintf (file, "u");
- else
- fprintf (file, "l");
- break;
-
- case 'M':
- /* For memory operations, write 's' if the operand is a short
- memory operand. */
- if (short_memory_operand (x, VOIDmode))
- fprintf (file, "s");
- break;
-
- case 'N':
- /* Like 'M', but check for zero memory offset. */
- if (zero_memory_operand (x, VOIDmode))
- fprintf (file, "s");
- break;
-
- case 'O':
- /* Write low-order part of DImode or DFmode. Supported for MEM
- and REG only. */
- if (GET_CODE (x) == REG)
- fprintf (file, "%s", reg_names[REGNO (x) + 1]);
- else if (GET_CODE (x) == MEM)
- print_operand (file, gen_rtx_MEM (GET_MODE (x),
- plus_constant (XEXP (x, 0), 4)), 0);
- else
- abort ();
- break;
-
- case 'C':
- /* Offset in constant pool for constant pool address. */
- if (! constant_pool_address_operand (x, VOIDmode))
- abort ();
- if (GET_CODE (x) == SYMBOL_REF)
- fprintf (file, "%d", get_pool_offset (x) + 12);
- else
- /* Must be (const (plus (symbol_ref) (const_int))) */
- fprintf (file, "%d",
- (get_pool_offset (XEXP (XEXP (x, 0), 0)) + 12
- + INTVAL (XEXP (XEXP (x, 0), 1))));
- break;
-
- case 'j':
- /* Branch opcode. Check for condition in test bit for eq/ne. */
- switch (GET_CODE (x))
- {
- case EQ:
- if (cc_status.flags & CC_IN_TB)
- fprintf (file, "ntb");
- else
- fprintf (file, "eq");
- break;
-
- case NE:
- if (cc_status.flags & CC_IN_TB)
- fprintf (file, "tb");
- else
- fprintf (file, "ne");
- break;
-
- case GT:
- case GTU:
- fprintf (file, "h");
- break;
-
- case LT:
- case LTU:
- fprintf (file, "l");
- break;
-
- case GE:
- case GEU:
- fprintf (file, "he");
- break;
-
- case LE:
- case LEU:
- fprintf (file, "le");
- break;
-
- default:
- output_operand_lossage ("invalid %%j value");
- }
- break;
-
- case 'J':
- /* Reversed branch opcode. */
- switch (GET_CODE (x))
- {
- case EQ:
- if (cc_status.flags & CC_IN_TB)
- fprintf (file, "tb");
- else
- fprintf (file, "ne");
- break;
-
- case NE:
- if (cc_status.flags & CC_IN_TB)
- fprintf (file, "ntb");
- else
- fprintf (file, "eq");
- break;
-
- case GT:
- case GTU:
- fprintf (file, "le");
- break;
-
- case LT:
- case LTU:
- fprintf (file, "he");
- break;
-
- case GE:
- case GEU:
- fprintf (file, "l");
- break;
-
- case LE:
- case LEU:
- fprintf (file, "h");
- break;
-
- default:
- output_operand_lossage ("invalid %%j value");
- }
- break;
-
- case '.':
- /* Output nothing. Used as delimiter in, e.g., "mc%B1%.3 " */
- break;
-
- case '#':
- /* Output 'x' if this insn has a delay slot, else nothing. */
- if (dbr_sequence_length ())
- fprintf (file, "x");
- break;
-
- case 0:
- if (GET_CODE (x) == REG)
- fprintf (file, "%s", reg_names[REGNO (x)]);
- else if (GET_CODE (x) == MEM)
- {
- if (GET_CODE (XEXP (x, 0)) == SYMBOL_REF
- && current_function_operand (x, Pmode))
- fprintf (file, "r14");
- else
- output_address (XEXP (x, 0));
- }
- else
- output_addr_const (file, x);
- break;
-
- default:
- output_operand_lossage ("invalid %%xn code");
- }
-}
-\f
-/* This page contains routines that are used to determine what the function
- prologue and epilogue code will do and write them out. */
-
-/* Return the first register that is required to be saved. 16 if none. */
-
-int
-first_reg_to_save()
-{
- int first_reg;
-
- /* Find lowest numbered live register. */
- for (first_reg = 6; first_reg <= 15; first_reg++)
- if (regs_ever_live[first_reg])
- break;
-
- /* If we think that we do not have to save r14, see if it will be used
- to be sure. */
- if (first_reg > 14 && romp_using_r14 ())
- first_reg = 14;
-
- return first_reg;
-}
-
-/* Compute the size of the save area in the stack, including the space for
- the first four incoming arguments. */
-
-int
-romp_sa_size ()
-{
- int size;
- int i;
-
- /* We have the 4 words corresponding to the arguments passed in registers,
- 4 reserved words, space for static chain, general register save area,
- and floating-point save area. */
- size = 4 + 4 + 1 + (16 - first_reg_to_save ());
-
- /* The documentation says we have to leave 18 words in the save area if
- any floating-point registers at all are saved, not the three words
- per register you might otherwise expect. */
- for (i = 2 + (TARGET_FP_REGS != 0); i <= 7; i++)
- if (regs_ever_live[i + 17])
- {
- size += 18;
- break;
- }
-
- return size * 4;
-}
-
-/* Return non-zero if this function makes calls or has fp operations
- (which are really calls). */
-
-int
-romp_makes_calls ()
-{
- rtx insn;
-
- for (insn = get_insns (); insn; insn = next_insn (insn))
- {
- if (GET_CODE (insn) == CALL_INSN)
- return 1;
- else if (GET_CODE (insn) == INSN)
- {
- rtx body = PATTERN (insn);
-
- if (GET_CODE (body) != USE && GET_CODE (body) != CLOBBER
- && GET_CODE (body) != ADDR_VEC
- && GET_CODE (body) != ADDR_DIFF_VEC
- && get_attr_type (insn) == TYPE_FP)
- return 1;
- }
- }
-
- return 0;
-}
-
-/* Return non-zero if this function will use r14 as a pointer to its
- constant pool. */
-
-int
-romp_using_r14 ()
-{
- /* If we are debugging, profiling, have a non-empty constant pool, or
- call a function, we need r14. */
- return (write_symbols != NO_DEBUG || current_function_profile
- || get_pool_size () != 0 || romp_makes_calls ());
-}
-
-/* Return non-zero if this function needs to push space on the stack. */
-
-int
-romp_pushes_stack ()
-{
- /* We need to push the stack if a frame pointer is needed (because the
- stack might be dynamically adjusted), if we are debugging, if the
- total required size is more than 100 bytes, or if we make calls. */
-
- return (frame_pointer_needed || write_symbols != NO_DEBUG
- || (romp_sa_size () + get_frame_size ()) > 100
- || romp_makes_calls ());
-}
-
-/* Write function prologue.
-
- We compute the size of the fixed area required as follows:
-
- We always allocate 4 words for incoming arguments, 4 word reserved, 1
- word for static link, as many words as required for general register
- save area, plus 2 words for each FP reg 2-7 that must be saved. */
-
-static void
-romp_output_function_prologue (file, size)
- FILE *file;
- HOST_WIDE_INT size;
-{
- int first_reg;
- int reg_save_offset;
- HOST_WIDE_INT fp_save = size + current_function_outgoing_args_size;
-
- init_fpops ();
-
- /* Add in fixed size plus output argument area. */
- size += romp_sa_size () + current_function_outgoing_args_size;
-
- /* Compute first register to save and perform the save operation if anything
- needs to be saved. */
- first_reg = first_reg_to_save();
- reg_save_offset = - (4 + 4 + 1 + (16 - first_reg)) * 4;
- if (first_reg == 15)
- fprintf (file, "\tst r15,%d(r1)\n", reg_save_offset);
- else if (first_reg < 16)
- fprintf (file, "\tstm r%d,%d(r1)\n", first_reg, reg_save_offset);
-
- /* Set up pointer to data area if it is needed. */
- if (romp_using_r14 ())
- fprintf (file, "\tcas r14,r0,r0\n");
-
- /* Set up frame pointer if needed. */
- if (frame_pointer_needed)
- fprintf (file, "\tcal r13,-%d(r1)\n", romp_sa_size () + 64);
-
- /* Push stack if neeeded. There are a couple of ways of doing this. */
- if (romp_pushes_stack ())
- {
- if (size >= 32768)
- {
- if (size >= 65536)
- {
- fprintf (file, "\tcau r0,%d(r0)\n", size >> 16);
- fprintf (file, "\toil r0,r0,%d\n", size & 0xffff);
- }
- else
- fprintf (file, "\tcal16 r0,%d(r0)\n", size);
- fprintf (file, "\ts r1,r0\n");
- }
- else
- fprintf (file, "\tcal r1,-%d(r1)\n", size);
- }
-
- /* Save floating-point registers. */
- output_loadsave_fpregs (file, USE,
- plus_constant (stack_pointer_rtx, fp_save));
-}
-\f
-/* Output the offset information used by debuggers.
- This is the exactly the total_size value of output_function_epilogue()
- which is added to the frame pointer. However the value in the debug
- table is encoded in a space-saving way as follows:
-
- The first byte contains two fields: a 2-bit size field and the first
- 6 bits of an offset value. The 2-bit size field is in the high-order
- position and specifies how many subsequent bytes follow after
- this one. An offset value is at most 4-bytes long.
-
- The last 6 bits of the first byte initialize the offset value. In many
- cases where procedures have small local storage, this is enough and, in
- this case, the high-order size field is zero so the byte can (almost) be
- used as is (see below). Thus, the byte value of 0x0d is encodes an offset
- size of 13 words, or 52 bytes.
-
- For procedures with a local space larger than 60 bytes, the 6 bits
- are the high-order 6 bits. The remaining bytes follow as necessary,
- in Big Endian order. Thus, the short value of 16907 (= 16384+523)
- encodes an offset of 2092 bytes (523 words).
-
- The total offset value is in words (not bytes), so the final value has to
- be multiplied by 4 before it can be used in address computations by a
- debugger. */
-
-void
-output_encoded_offset (file, reg_offset)
- FILE *file;
- unsigned reg_offset;
-{
- /* Convert the offset value to 4-byte words rather than bytes. */
- reg_offset = (reg_offset + 3) / 4;
-
- /* Now output 1-4 bytes in encoded form. */
- if (reg_offset < (1 << 6))
- /* Fits into one byte */
- fprintf (file, "\t.byte %d\n", reg_offset);
- else if (reg_offset < (1 << (6 + 8)))
- /* Fits into two bytes */
- fprintf (file, "\t.short %d\n", (1 << (6 + 8)) + reg_offset);
- else if (reg_offset < (1 << (6 + 8 + 8)))
- {
- /* Fits in three bytes */
- fprintf (file, "\t.byte %d\n", (2 << 6) + (reg_offset >> ( 6+ 8)));
- fprintf (file, "\t.short %d\n", reg_offset % (1 << (6 + 8)));
- }
- else
- {
- /* Use 4 bytes. */
- fprintf (file, "\t.short %d", (3 << (6 + 8)) + (reg_offset >> (6 + 8)));
- fprintf (file, "\t.short %d\n", reg_offset % (1 << (6 + 8)));
- }
-}
-\f
-/* Write function epilogue. */
-
-static void
-romp_output_function_epilogue (file, size)
- FILE *file;
- HOST_WIDE_INT size;
-{
- int first_reg = first_reg_to_save();
- int pushes_stack = romp_pushes_stack ();
- int reg_save_offset = - ((16 - first_reg) + 1 + 4 + 4) * 4;
- HOST_WIDE_INT total_size = (size + romp_sa_size ()
- + current_function_outgoing_args_size);
- HOST_WIDE_INT fp_save = size + current_function_outgoing_args_size;
- int long_frame = total_size >= 32768;
- rtx insn = get_last_insn ();
- int write_code = 1;
-
- int nargs = 0; /* words of arguments */
- tree argptr;
-
- /* Compute the number of words of arguments. Since this is just for
- the traceback table, we ignore arguments that don't have a size or
- don't have a fixed size. */
-
- for (argptr = DECL_ARGUMENTS (current_function_decl);
- argptr; argptr = TREE_CHAIN (argptr))
- {
- int this_size = int_size_in_bytes (TREE_TYPE (argptr));
-
- if (this_size > 0)
- nargs += (this_size + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
- }
-
- /* If the last insn was a BARRIER, we don't have to write anything except
- the trace table. */
- if (GET_CODE (insn) == NOTE)
- insn = prev_nonnote_insn (insn);
- if (insn && GET_CODE (insn) == BARRIER)
- write_code = 0;
-
- /* Restore floating-point registers. */
- if (write_code)
- output_loadsave_fpregs (file, CLOBBER,
- plus_constant (gen_rtx_REG (Pmode, 1), fp_save));
-
- /* If we push the stack and do not have size > 32K, adjust the register
- save location to the current position of sp. Otherwise, if long frame,
- restore sp from fp. */
- if (pushes_stack && ! long_frame)
- reg_save_offset += total_size;
- else if (long_frame && write_code)
- fprintf (file, "\tcal r1,%d(r13)\n", romp_sa_size () + 64);
-
- /* Restore registers. */
- if (first_reg == 15 && write_code)
- fprintf (file, "\tl r15,%d(r1)\n", reg_save_offset);
- else if (first_reg < 16 && write_code)
- fprintf (file, "\tlm r%d,%d(r1)\n", first_reg, reg_save_offset);
- if (first_reg == 16) first_reg = 0;
-
- /* Handle popping stack, if needed and write debug table entry. */
- if (pushes_stack)
- {
- if (write_code)
- {
- if (long_frame)
- fprintf (file, "\tbr r15\n");
- else
- fprintf (file, "\tbrx r15\n\tcal r1,%d(r1)\n", total_size);
- }
-
- /* Table header (0xdf), usual-type stack frame (0x07),
- table header (0xdf), and first register saved.
-
- The final 0x08 means that there is a byte following this one
- describing the number of parameter words and the register used as
- stack pointer.
-
- If GCC passed floating-point parameters in floating-point registers,
- it would be necessary to change the final byte from 0x08 to 0x0c.
- Also an additional entry byte would be need to be emitted to specify
- the first floating-point register.
-
- (See also Section 11 (Trace Tables) in ``IBM/4.3 Linkage Convention,''
- pages IBM/4.3-PSD:5-7 of Volume III of the IBM Academic Operating
- System Manual dated July 1987.) */
-
- fprintf (file, "\t.long 0x%x\n", 0xdf07df08 + first_reg * 0x10);
-
- if (nargs > 15) nargs = 15;
-
- /* The number of parameter words and the register used as the stack
- pointer (encoded here as r1).
-
- Note: The MetWare Hich C Compiler R2.1y actually gets this wrong;
- it erroneously lists r13 but uses r1 as the stack too. But a bug in
- dbx 1.5 nullifies this mistake---most of the time.
- (Dbx retrieves the value of r13 saved on the stack which is often
- the value of r1 before the call.) */
-
- fprintf (file, "\t.byte 0x%x1\n", nargs);
- output_encoded_offset (file, total_size);
- }
- else
- {
- if (write_code)
- fprintf (file, "\tbr r15\n");
-
- /* Table header (0xdf), no stack frame (0x02),
- table header (0xdf) and no parameters saved (0x00).
-
- If GCC passed floating-point parameters in floating-point registers,
- it might be necessary to change the final byte from 0x00 to 0x04.
- Also a byte would be needed to specify the first floating-point
- register. */
- fprintf (file, "\t.long 0xdf02df00\n");
- }
-
- /* Output any pending floating-point operations. */
- output_fpops (file);
-}
-\f
-/* For the ROMP we need to make new SYMBOL_REFs for the actual name of a
- called routine. To keep them unique we maintain a hash table of all
- that have been created so far. */
-
-struct symref_hashent {
- rtx symref; /* Created SYMBOL_REF rtx. */
- struct symref_hashent *next; /* Next with same hash code. */
-};
-
-#define SYMHASHSIZE 151
-#define HASHBITS 65535
-
-/* Define the hash table itself. */
-
-static struct symref_hashent *symref_hash_table[SYMHASHSIZE];
-
-/* Given a name (allocable in temporary storage), return a SYMBOL_REF
- for the name. The rtx is allocated from the current rtl_obstack, while
- the name string is allocated from the permanent obstack. */
-rtx
-get_symref (name)
- register const char *name;
-{
- extern struct obstack permanent_obstack;
- register const char *sp = name;
- unsigned int hash = 0;
- struct symref_hashent *p, **last_p;
-
- /* Compute the hash code for the string. */
- while (*sp)
- hash = (hash << 4) + *sp++;
-
- /* Search for a matching entry in the hash table, keeping track of the
- insertion location as we do so. */
- hash = (hash & HASHBITS) % SYMHASHSIZE;
- for (last_p = &symref_hash_table[hash], p = *last_p;
- p; last_p = &p->next, p = *last_p)
- if (strcmp (name, XSTR (p->symref, 0)) == 0)
- break;
-
- /* If couldn't find matching SYMBOL_REF, make a new one. */
- if (p == 0)
- {
- /* Ensure SYMBOL_REF will stay around. */
- p = *last_p = (struct symref_hashent *)
- permalloc (sizeof (struct symref_hashent));
- p->symref = gen_rtx_SYMBOL_REF (Pmode,
- obstack_copy0 (&permanent_obstack,
- name, strlen (name)));
- p->next = 0;
- }
-
- return p->symref;
-}
-\f
-/* Validate the precision of a floating-point operation.
-
- We merge conversions from integers and between floating-point modes into
- the insn. However, this must not effect the desired precision of the
- insn. The RT floating-point system uses the widest of the operand modes.
- If this should be a double-precision insn, ensure that one operand
- passed to the floating-point processor has double mode.
-
- Note that since we don't check anything if the mode is single precision,
- it, strictly speaking, isn't necessary to call this for those insns.
- However, we do so in case something else needs to be checked in the
- future.
-
- This routine returns 1 if the operation is OK. */
-
-int
-check_precision (opmode, op1, op2)
- enum machine_mode opmode;
- rtx op1, op2;
-{
- if (opmode == SFmode)
- return 1;
-
- /* If operand is not a conversion from an integer mode or an extension from
- single-precision, it must be a double-precision value. */
- if (GET_CODE (op1) != FLOAT && GET_CODE (op1) != FLOAT_EXTEND)
- return 1;
-
- if (op2 && GET_CODE (op2) != FLOAT && GET_CODE (op2) != FLOAT_EXTEND)
- return 1;
-
- return 0;
-}
-\f
-/* Floating-point on the RT is done by creating an operation block in the data
- area that describes the operation. If two floating-point operations are the
- same in a single function, they can use the same block.
-
- These routines are responsible for managing these blocks. */
-
-/* Structure to describe a floating-point operation. */
-
-struct fp_op {
- struct fp_op *next_same_hash; /* Next op with same hash code. */
- struct fp_op *next_in_mem; /* Next op in memory. */
- int mem_offset; /* Offset from data area. */
- short size; /* Size of block in bytes. */
- short noperands; /* Number of operands in block. */
- rtx ops[3]; /* RTL for operands. */
- enum rtx_code opcode; /* Operation being performed. */
-};
-
-/* Size of hash table. */
-#define FP_HASH_SIZE 101
-
-/* Hash table of floating-point operation blocks. */
-static struct fp_op *fp_hash_table[FP_HASH_SIZE];
-
-/* First floating-point block in data area. */
-static struct fp_op *first_fpop;
-
-/* Last block in data area so far. */
-static struct fp_op *last_fpop_in_mem;
-
-/* Subroutine number in file, to get unique "LF" labels. */
-static int subr_number = 0;
-
-/* Current word offset in data area (includes header and any constant pool). */
-int data_offset;
-
-/* Compute hash code for an RTX used in floating-point. */
-
-static unsigned int
-hash_rtx (x)
- register rtx x;
-{
- register unsigned int hash = (((int) GET_CODE (x) << 10)
- + ((int) GET_MODE (x) << 20));
- register int i;
- register const char *fmt = GET_RTX_FORMAT (GET_CODE (x));
-
- for (i = 0; i < GET_RTX_LENGTH (GET_CODE (x)); i++)
- if (fmt[i] == 'e')
- hash += hash_rtx (XEXP (x, i));
- else if (fmt[i] == 'u')
- hash += (unsigned HOST_WIDE_INT) XEXP (x, i);
- else if (fmt[i] == 'i')
- hash += XINT (x, i);
- else if (fmt[i] == 's')
- hash += (unsigned HOST_WIDE_INT) XSTR (x, i);
-
- return hash;
-}
-\f
-/* Given an operation code and up to three operands, return a character string
- corresponding to the code to emit to branch to a floating-point operation
- block. INSN is provided to see if the delay slot has been filled or not.
-
- A new floating-point operation block is created if this operation has not
- been seen before. */
-
-const char *
-output_fpop (code, op0, op1, op2, insn)
- enum rtx_code code;
- rtx op0, op1, op2;
- rtx insn ATTRIBUTE_UNUSED;
-{
- static char outbuf[40];
- unsigned int hash, hash0, hash1, hash2;
- int size, i;
- register struct fp_op *fpop, *last_fpop;
- int dyadic = (op2 != 0);
- enum machine_mode opmode;
- int noperands;
- rtx tem;
- unsigned int tem_hash;
- int fr0_avail = 0;
-
- /* Compute hash code for each operand. If the operation is commutative,
- put the one with the smaller hash code first. This will make us see
- more operations as identical. */
- hash0 = op0 ? hash_rtx (op0) : 0;
- hash1 = op1 ? hash_rtx (op1) : 0;
- hash2 = op2 ? hash_rtx (op2) : 0;
-
- if (hash0 > hash1 && code == EQ)
- {
- tem = op0; op0 = op1; op1 = tem;
- tem_hash = hash0; hash0 = hash1; hash1 = tem_hash;
- }
- else if (hash1 > hash2 && (code == PLUS || code == MULT))
- {
- tem = op1; op1 = op2; op2 = tem;
- tem_hash = hash1; hash1 = hash2; hash2 = tem_hash;
- }
-
- /* If operation is commutative and the first and third operands are equal,
- swap the second and third operands. Note that we must consider two
- operands equal if they are the same register even if different modes. */
- if (op2 && (code == PLUS || code == MULT)
- && (rtx_equal_p (op0, op2)
- || (GET_CODE (op0) == REG && GET_CODE (op2) == REG
- && REGNO (op0) == REGNO (op2))))
- {
- tem = op1; op1 = op2; op2 = tem;
- tem_hash = hash1; hash1 = hash2; hash2 = tem_hash;
- }
-
- /* If the first and second operands are the same, merge them. Don't do this
- for SFmode or SImode in general registers because this triggers a bug in
- the RT fp code. */
- if (op1 && rtx_equal_p (op0, op1)
- && code != EQ && code != GE && code != SET
- && ((GET_MODE (op1) != SFmode && GET_MODE (op1) != SImode)
- || GET_CODE (op0) != REG || FP_REGNO_P (REGNO (op0))))
- {
- op1 = op2;
- op2 = 0;
- }
-
- noperands = 1 + (op1 != 0) + (op2 != 0);
-
- /* Compute hash code for entire expression and see if operation block
- already exists. */
- hash = ((int) code << 13) + (hash0 << 2) + (hash1 << 1) + hash2;
-
- hash %= FP_HASH_SIZE;
- for (fpop = fp_hash_table[hash], last_fpop = 0;
- fpop;
- last_fpop = fpop, fpop = fpop->next_same_hash)
- if (fpop->opcode == code && noperands == fpop->noperands
- && (op0 == 0 || rtx_equal_p (op0, fpop->ops[0]))
- && (op1 == 0 || rtx_equal_p (op1, fpop->ops[1]))
- && (op2 == 0 || rtx_equal_p (op2, fpop->ops[2])))
- goto win;
-
- /* We have never seen this operation before. */
- fpop = (struct fp_op *) xmalloc (sizeof (struct fp_op));
- fpop->mem_offset = data_offset;
- fpop->opcode = code;
- fpop->noperands = noperands;
- fpop->ops[0] = op0;
- fpop->ops[1] = op1;
- fpop->ops[2] = op2;
-
- /* Compute the size using the rules in Appendix A of the RT Linkage
- Convention (4.3/RT-PSD:5) manual. These rules are a bit ambiguous,
- but if we guess wrong, it will effect only efficiency, not correctness. */
-
- /* Size = 24 + 32 for each non-fp (or fr7) */
- size = 24;
- if (op0 && (GET_CODE (op0) != REG
- || ! FP_REGNO_P (REGNO (op0)) || REGNO (op0) == 23))
- size += 32;
-
- if (op1 && (GET_CODE (op1) != REG
- || ! FP_REGNO_P (REGNO (op1)) || REGNO (op1) == 23))
- size += 32;
-
- if (op2 && (GET_CODE (op2) != REG
- || ! FP_REGNO_P (REGNO (op2)) || REGNO (op2) == 23))
- size += 32;
-
- /* Size + 12 for each conversion. First get operation mode. */
- if ((op0 && GET_MODE (op0) == DFmode)
- || (op1 && GET_MODE (op1) == DFmode)
- || (op2 && GET_MODE (op2) == DFmode))
- opmode = DFmode;
- else
- opmode = SFmode;
-
- if (op0 && GET_MODE (op0) != opmode)
- size += 12;
- if (op1 && GET_MODE (op1) != opmode)
- size += 12;
- if (op2 && GET_MODE (op2) != opmode)
- size += 12;
-
- /* 12 more if first and third operand types not the same. */
- if (op2 && GET_MODE (op0) != GET_MODE (op2))
- size += 12;
-
- /* CMP and CMPT need additional. Also, compute size of save/restore here. */
- if (code == EQ)
- size += 32;
- else if (code == GE)
- size += 64;
- else if (code == USE || code == CLOBBER)
- {
- /* 34 + 24 for each additional register plus 8 if fr7 saved. (We
- call it 36 because we need to keep the block length a multiple
- of four. */
- size = 36 - 24;
- for (i = 0; i <= 7; i++)
- if (INTVAL (op0) & (1 << (7-i)))
- size += 24 + 8 * (i == 7);
- }
-
- /* We provide no general-purpose scratch registers. */
- size +=16;
-
- /* No floating-point scratch registers are provided. Compute extra
- length due to this. This logic is that shown in the referenced
- appendix. */
-
- i = 0;
- if (op0 && GET_CODE (op0) == REG && FP_REGNO_P (REGNO (op0)))
- i++;
- if (op1 && GET_CODE (op1) == REG && FP_REGNO_P (REGNO (op1)))
- i++;
- if (op2 && GET_CODE (op2) == REG && FP_REGNO_P (REGNO (op2)))
- i++;
-
- if ((op0 == 0 || GET_CODE (op0) != REG || REGNO(op0) != 17)
- && (op1 == 0 || GET_CODE (op1) != REG || REGNO(op1) != 17)
- && (op2 == 0 || GET_CODE (op2) != REG || REGNO(op2) != 17))
- fr0_avail = 1;
-
- if (dyadic)
- {
- if (i == 0)
- size += fr0_avail ? 64 : 112;
- else if (fpop->noperands == 2 && i == 1)
- size += fr0_avail ? 0 : 64;
- else if (fpop->noperands == 3)
- {
- if (GET_CODE (op0) == REG && FP_REGNO_P (REGNO (op0))
- && GET_CODE (op2) == REG && FP_REGNO_P (REGNO (op2)))
- {
- if (REGNO (op0) == REGNO (op2))
-#if 1
- /* This triggers a bug on the RT. */
- abort ();
-#else
- size += fr0_avail ? 0 : 64;
-#endif
- }
- else
- {
- i = 0;
- if (GET_CODE (op0) == REG && FP_REGNO_P (REGNO (op0)))
- i++;
- if (GET_CODE (op2) == REG && FP_REGNO_P (REGNO (op2)))
- i++;
- if (i == 0)
- size += fr0_avail ? 64 : 112;
- else if (i == 1)
- size += fr0_avail ? 0 : 64;
- }
- }
- }
- else if (code != USE && code != CLOBBER
- && (GET_CODE (op0) != REG || ! FP_REGNO_P (REGNO (op0))))
- size += 64;
-
- if (! TARGET_FULL_FP_BLOCKS)
- {
- /* If we are not to pad the blocks, just compute its actual length. */
- size = 12; /* Header + opcode */
- if (code == USE || code == CLOBBER)
- size += 2;
- else
- {
- if (op0) size += 2;
- if (op1) size += 2;
- if (op2) size += 2;
- }
-
- /* If in the middle of a word, round. */
- if (size % UNITS_PER_WORD)
- size += 2;
-
- /* Handle any immediates. */
- if (code != USE && code != CLOBBER && op0 && GET_CODE (op0) != REG)
- size += 4;
- if (op1 && GET_CODE (op1) != REG)
- size += 4;
- if (op2 && GET_CODE (op2) != REG)
- size += 4;
-
- if (code != USE && code != CLOBBER &&
- op0 && GET_CODE (op0) == CONST_DOUBLE && GET_MODE (op0) == DFmode)
- size += 4;
- if (op1 && GET_CODE (op1) == CONST_DOUBLE && GET_MODE (op1) == DFmode)
- size += 4;
- if (op2 && GET_CODE (op2) == CONST_DOUBLE && GET_MODE (op2) == DFmode)
- size += 4;
- }
-
- /* Done with size computation! Chain this in. */
- fpop->size = size;
- data_offset += size / UNITS_PER_WORD;
- fpop->next_in_mem = 0;
- fpop->next_same_hash = 0;
-
- if (last_fpop_in_mem)
- last_fpop_in_mem->next_in_mem = fpop;
- else
- first_fpop = fpop;
- last_fpop_in_mem = fpop;
-
- if (last_fpop)
- last_fpop->next_same_hash = fpop;
- else
- fp_hash_table[hash] = fpop;
-
-win:
- /* FPOP describes the operation to be performed. Return a string to branch
- to it. */
- if (fpop->mem_offset < 32768 / UNITS_PER_WORD)
- sprintf (outbuf, "cal r15,%d(r14)\n\tbalr%s r15,r15",
- fpop->mem_offset * UNITS_PER_WORD,
- dbr_sequence_length () ? "x" : "");
- else
- sprintf (outbuf, "get r15,$L%dF%d\n\tbalr%s r15,r15",
- subr_number, fpop->mem_offset * UNITS_PER_WORD,
- dbr_sequence_length () ? "x" : "");
- return outbuf;
-}
-\f
-/* If necessary, output a floating-point operation to save or restore all
- floating-point registers.
-
- file is the file to write the operation to, CODE is USE for save, CLOBBER
- for restore, and ADDR is the address of the same area, as RTL. */
-
-static void
-output_loadsave_fpregs (file, code, addr)
- FILE *file;
- enum rtx_code code;
- rtx addr;
-{
- register int i;
- register int mask = 0;
-
- for (i = 2 + (TARGET_FP_REGS != 0); i <= 7; i++)
- if (regs_ever_live[i + 17])
- mask |= 1 << (7 - i);
-
- if (mask)
- fprintf (file, "\t%s\n",
- output_fpop (code, GEN_INT (mask), gen_rtx_MEM (Pmode, addr),
- 0, const0_rtx));
-
-}
-\f
-/* Output any floating-point operations at the end of the routine. */
-
-static void
-output_fpops (file)
- FILE *file;
-{
- register struct fp_op *fpop;
- register int size_so_far;
- register int i;
- rtx immed[3];
-
- if (first_fpop == 0)
- return;
-
- data_section ();
-
- ASM_OUTPUT_ALIGN (file, 2);
-
- for (fpop = first_fpop; fpop; fpop = fpop->next_in_mem)
- {
- if (fpop->mem_offset < 32768 / UNITS_PER_WORD)
- fprintf (file, "# data area offset = %d\n",
- fpop->mem_offset * UNITS_PER_WORD);
- else
- fprintf (file, "L%dF%d:\n",
- subr_number, fpop->mem_offset * UNITS_PER_WORD);
-
- fprintf (file, "\tcas r0,r15,r0\n");
- fprintf (file, "\t.long FPGLUE\n");
- switch (fpop->opcode)
- {
- case USE:
- fprintf (file, "\t.byte 0x1d\t# STOREM\n");
- break;
- case CLOBBER:
- fprintf (file, "\t.byte 0x0f\t# LOADM\n");
- break;
- case ABS:
- fprintf (file, "\t.byte 0x00\t# ABS\n");
- break;
- case PLUS:
- fprintf (file, "\t.byte 0x02\t# ADD\n");
- break;
- case EQ:
- fprintf (file, "\t.byte 0x07\t# CMP\n");
- break;
- case GE:
- fprintf (file, "\t.byte 0x08\t# CMPT\n");
- break;
- case DIV:
- fprintf (file, "\t.byte 0x0c\t# DIV\n");
- break;
- case SET:
- fprintf (file, "\t.byte 0x14\t# MOVE\n");
- break;
- case MULT:
- fprintf (file, "\t.byte 0x15\t# MUL\n");
- break;
- case NEG:
- fprintf (file, "\t.byte 0x16\t# NEG\n");
- break;
- case SQRT:
- fprintf (file, "\t.byte 0x1c\t# SQRT\n");
- break;
- case MINUS:
- fprintf (file, "\t.byte 0x1e\t# SUB\n");
- break;
- default:
- abort ();
- }
-
- fprintf (file, "\t.byte %d\n", fpop->noperands);
- fprintf (file, "\t.short 0x8001\n");
-
- if ((fpop->ops[0] == 0
- || GET_CODE (fpop->ops[0]) != REG || REGNO(fpop->ops[0]) != 17)
- && (fpop->ops[1] == 0 || GET_CODE (fpop->ops[1]) != REG
- || REGNO(fpop->ops[1]) != 17)
- && (fpop->ops[2] == 0 || GET_CODE (fpop->ops[2]) != REG
- || REGNO(fpop->ops[2]) != 17))
- fprintf (file, "\t.byte %d, 0x80\n", fpop->size);
- else
- fprintf (file, "\t.byte %d, 0\n", fpop->size);
- size_so_far = 12;
- for (i = 0; i < fpop->noperands; i++)
- {
- register int type;
- register int opbyte;
- register const char *desc0;
- char desc1[50];
-
- immed[i] = 0;
- switch (GET_MODE (fpop->ops[i]))
- {
- case SImode:
- case VOIDmode:
- desc0 = "int";
- type = 0;
- break;
- case SFmode:
- desc0 = "float";
- type = 2;
- break;
- case DFmode:
- desc0 = "double";
- type = 3;
- break;
- default:
- abort ();
- }
-
- switch (GET_CODE (fpop->ops[i]))
- {
- case REG:
- strcpy(desc1, reg_names[REGNO (fpop->ops[i])]);
- if (FP_REGNO_P (REGNO (fpop->ops[i])))
- {
- type += 0x10;
- opbyte = REGNO (fpop->ops[i]) - 17;
- }
- else
- {
- type += 0x00;
- opbyte = REGNO (fpop->ops[i]);
- if (type == 3)
- opbyte = (opbyte << 4) + opbyte + 1;
- }
- break;
-
- case MEM:
- type += 0x30;
- if (GET_CODE (XEXP (fpop->ops[i], 0)) == PLUS)
- {
- immed[i] = XEXP (XEXP (fpop->ops[i], 0), 1);
- opbyte = REGNO (XEXP (XEXP (fpop->ops[i], 0), 0));
- if (GET_CODE (immed[i]) == CONST_INT)
- sprintf (desc1, "%d(%s)", INTVAL (immed[i]),
- reg_names[opbyte]);
- else
- sprintf (desc1, "<memory> (%s)", reg_names[opbyte]);
- }
- else if (GET_CODE (XEXP (fpop->ops[i], 0)) == REG)
- {
- opbyte = REGNO (XEXP (fpop->ops[i], 0));
- immed[i] = const0_rtx;
- sprintf (desc1, "(%s)", reg_names[opbyte]);
- }
- else
- {
- immed[i] = XEXP (fpop->ops[i], 0);
- opbyte = 0;
- sprintf(desc1, "<memory>");
- }
- break;
-
- case CONST_INT:
- case CONST_DOUBLE:
- case CONST:
- case SYMBOL_REF:
- case LABEL_REF:
- type += 0x20;
- opbyte = 0;
- immed[i] = fpop->ops[i];
- desc1[0] = '$';
- desc1[1] = '\0';
- break;
-
- default:
- abort ();
- }
-
- /* Save/restore is special. */
- if (i == 0 && (fpop->opcode == USE || fpop->opcode == CLOBBER))
- type = 0xff, opbyte = INTVAL (fpop->ops[0]), immed[i] = 0;
-
- fprintf (file, "\t.byte 0x%x,0x%x # (%s) %s\n",
- type, opbyte, desc0, desc1);
-
- size_so_far += 2;
- }
-
- /* If in the middle of a word, round. */
- if (size_so_far % UNITS_PER_WORD)
- {
- fprintf (file, "\t.space 2\n");
- size_so_far += 2;
- }
-
- for (i = 0; i < fpop->noperands; i++)
- if (immed[i])
- switch (GET_MODE (immed[i]))
- {
- case SImode:
- case VOIDmode:
- size_so_far += 4;
- fprintf (file, "\t.long ");
- output_addr_const (file, immed[i]);
- fprintf (file, "\n");
- break;
-
- case DFmode:
- size_so_far += 4;
- case SFmode:
- size_so_far += 4;
- if (GET_CODE (immed[i]) == CONST_DOUBLE)
- {
- union real_extract u;
-
- memcpy (&u, &CONST_DOUBLE_LOW (immed[i]), sizeof u);
- assemble_real (u.d, GET_MODE (immed[i]),
- GET_MODE_ALIGNMENT (GET_MODE (immed[i])));
- }
- else
- abort ();
- break;
-
- default:
- abort ();
- }
-
- if (size_so_far != fpop->size)
- {
- if (TARGET_FULL_FP_BLOCKS)
- fprintf (file, "\t.space %d\n", fpop->size - size_so_far);
- else
- abort ();
- }
- }
-
- /* Update for next subroutine. */
- subr_number++;
- text_section ();
-}
-
- /* Initialize floating-point operation table. */
-
-static void
-init_fpops()
-{
- register int i;
-
- first_fpop = last_fpop_in_mem = 0;
- for (i = 0; i < FP_HASH_SIZE; i++)
- fp_hash_table[i] = 0;
-}
-\f
-/* Return the offset value of an automatic variable (N_LSYM) having
- the given offset. Basically, we correct by going from a frame pointer to
- stack pointer value.
-*/
-
-int
-romp_debugger_auto_correction(offset)
- int offset;
-{
- int fp_to_sp;
-
- /* We really want to go from STACK_POINTER_REGNUM to
- FRAME_POINTER_REGNUM, but this isn't defined. So go the other
- direction and negate. */
- INITIAL_ELIMINATION_OFFSET (FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM,
- fp_to_sp);
-
- /* The offset value points somewhere between the frame pointer and
- the stack pointer. What is up from the frame pointer is down from the
- stack pointer. Therefore the negation in the offset value too. */
-
- return -(offset+fp_to_sp+4);
-}
-
-/* Return the offset value of an argument having
- the given offset. Basically, we correct by going from an arg pointer to
- stack pointer value. */
-
-int
-romp_debugger_arg_correction (offset)
- int offset;
-{
- int fp_to_argp;
-
- INITIAL_ELIMINATION_OFFSET (ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM,
- fp_to_argp);
-
- /* Actually, something different happens if offset is from a floating-point
- register argument, but we don't handle it here. */
-
- return (offset - fp_to_argp);
-}
-
-void
-romp_initialize_trampoline (tramp, fnaddr, cxt)
- rtx tramp, fnaddr, cxt;
-{
- rtx addr, temp, val;
-
- temp = expand_simple_binop (SImode, PLUS, tramp, GEN_INT (4),
- 0, 1, OPTAB_LIB_WIDEN);
- emit_move_insn (gen_rtx_MEM (SImode, memory_address (SImode, tramp)), temp);
-
- val = force_reg (SImode, cxt);
- addr = memory_address (HImode, plus_constant (tramp, 10));
- emit_move_insn (gen_rtx_MEM (HImode, addr), gen_lowpart (HImode, val));
- temp = expand_shift (RSHIFT_EXPR, SImode, val, build_int_2 (16, 0), 0, 1);
- addr = memory_address (HImode, plus_constant (tramp, 6));
- emit_move_insn (gen_rtx_MEM (HImode, addr), gen_lowpart (HImode, temp));
-
- val = force_reg (SImode, fnaddr);
- addr = memory_address (HImode, plus_constant (tramp, 24));
- emit_move_insn (gen_rtx_MEM (HImode, addr), gen_lowpart (HImode, val));
- temp = expand_shift (RSHIFT_EXPR, SImode, val, build_int_2 (16, 0), 0, 1);
- addr = memory_address (HImode, plus_constant (tramp, 20));
- emit_move_insn (gen_rtx_MEM (HImode, addr), gen_lowpart (HImode, temp));
-}
projects / msp430-gcc.git / blobdiff