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mips.c (gpr_mode): New variable.

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* mips.c (gpr_mode): New variable.
        (override_options): Initialize gpr_mode.
        (compute_frame_size): Use "gpr_mode" instead of "word_mode" to
        determine size and offset of general purpose registers save slots.
        (save_restore_insns, mips_expand_prologue): Similarly.

From-SVN: r20403
This commit is contained in:
Jeffrey A Law 1998-06-10 09:15:39 +00:00 committed by Jeff Law
parent 0254c56158
commit bfed8dac97
2 changed files with 33 additions and 18 deletions
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6
gcc/ChangeLog
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@ -6,6 +6,12 @@ Wed Jun 10 08:56:27 1998 John Carr <jfc@mit.edu>
Wed Jun 10 02:11:55 1998 Jeffrey A Law (law@cygnus.com)
* mips.c (gpr_mode): New variable.
(override_options): Initialize gpr_mode.
(compute_frame_size): Use "gpr_mode" instead of "word_mode" to
determine size and offset of general purpose registers save slots.
(save_restore_insns, mips_expand_prologue): Similarly.
* reload.c (find_reloads_toplev): Use gen_lowpart common to convert
between constant representations when we have (SUBREG (REG)) with
REG equivalent to a constant.

45
gcc/config/mips/mips.c
View File

@ -244,6 +244,9 @@ enum mips_abicalls_type mips_abicalls;
initialized in override_options. */
REAL_VALUE_TYPE dfhigh, dflow, sfhigh, sflow;
/* Mode used for saving/restoring general purpose registers. */
static static enum machine_mode gpr_mode;
/* Array giving truth value on whether or not a given hard register
can support a given mode. */
char mips_hard_regno_mode_ok[(int)MAX_MACHINE_MODE][FIRST_PSEUDO_REGISTER];
@ -4449,6 +4452,9 @@ override_options ()
mips_hard_regno_mode_ok[(int)mode][regno] = temp;
}
}
/* Save GPR registers in word_mode sized hunks. */
gpr_mode = word_mode;
}
/* On the mips16, we want to allocate $24 (T_REG) before other
@ -5495,7 +5501,7 @@ compute_frame_size (size)
|| (GET_MODE_SIZE (DECL_MODE (DECL_RESULT (current_function_decl)))
<= 4))))
{
gp_reg_size += UNITS_PER_WORD;
gp_reg_size += GET_MODE_SIZE (gpr_mode);
mask |= 1L << (regno - GP_REG_FIRST);
/* The entry and exit pseudo instructions can not save $17
@ -5582,9 +5588,10 @@ compute_frame_size (size)
top of the stack. */
if (! mips_entry)
offset = (args_size + extra_size + var_size
+ gp_reg_size - UNITS_PER_WORD);
+ gp_reg_size - GET_MODE_SIZE (gpr_mode));
else
offset = total_size - UNITS_PER_WORD;
offset = total_size - GET_MODE_SIZE (gpr_mode);
current_frame_info.gp_sp_offset = offset;
current_frame_info.gp_save_offset = offset - total_size;
}
@ -5660,7 +5667,8 @@ save_restore_insns (store_p, large_reg, large_offset, file)
gp_offset = current_frame_info.gp_sp_offset;
end_offset
= gp_offset - (current_frame_info.gp_reg_size - UNITS_PER_WORD);
= gp_offset - (current_frame_info.gp_reg_size
- GET_MODE_SIZE (gpr_mode));
if (gp_offset < 0 || end_offset < 0)
fatal ("gp_offset (%ld) or end_offset (%ld) is less than zero.",
@ -5771,7 +5779,7 @@ save_restore_insns (store_p, large_reg, large_offset, file)
{
rtx reg_rtx;
rtx mem_rtx
= gen_rtx (MEM, word_mode,
= gen_rtx (MEM, gpr_mode,
gen_rtx (PLUS, Pmode, base_reg_rtx,
GEN_INT (gp_offset - base_offset)));
@ -5781,23 +5789,23 @@ save_restore_insns (store_p, large_reg, large_offset, file)
$31, so we load $7 instead, and work things out
in the caller. */
if (TARGET_MIPS16 && ! store_p && regno == GP_REG_FIRST + 31)
reg_rtx = gen_rtx (REG, word_mode, GP_REG_FIRST + 7);
reg_rtx = gen_rtx (REG, gpr_mode, GP_REG_FIRST + 7);
/* The mips16 sometimes needs to save $18. */
else if (TARGET_MIPS16
&& regno != GP_REG_FIRST + 31
&& ! M16_REG_P (regno))
{
if (! store_p)
reg_rtx = gen_rtx (REG, word_mode, 6);
reg_rtx = gen_rtx (REG, gpr_mode, 6);
else
{
reg_rtx = gen_rtx (REG, word_mode, 3);
reg_rtx = gen_rtx (REG, gpr_mode, 3);
emit_move_insn (reg_rtx,
gen_rtx (REG, word_mode, regno));
gen_rtx (REG, gpr_mode, regno));
}
}
else
reg_rtx = gen_rtx (REG, word_mode, regno);
reg_rtx = gen_rtx (REG, gpr_mode, regno);
if (store_p)
{
@ -5811,7 +5819,7 @@ save_restore_insns (store_p, large_reg, large_offset, file)
if (TARGET_MIPS16
&& regno != GP_REG_FIRST + 31
&& ! M16_REG_P (regno))
emit_move_insn (gen_rtx (REG, word_mode, regno),
emit_move_insn (gen_rtx (REG, gpr_mode, regno),
reg_rtx);
}
}
@ -5857,7 +5865,7 @@ save_restore_insns (store_p, large_reg, large_offset, file)
}
}
gp_offset -= UNITS_PER_WORD;
gp_offset -= GET_MODE_SIZE (gpr_mode);
}
}
else
@ -6331,9 +6339,10 @@ mips_expand_prologue ()
{
if (offset != 0)
ptr = gen_rtx (PLUS, Pmode, stack_pointer_rtx, GEN_INT (offset));
emit_move_insn (gen_rtx (MEM, word_mode, ptr),
gen_rtx (REG, word_mode, regno));
offset += UNITS_PER_WORD;
emit_move_insn (gen_rtx (MEM, gpr_mode, ptr),
gen_rtx (REG, gpr_mode, regno));
offset += GET_MODE_SIZE (gpr_mode);
}
}
@ -6378,7 +6387,7 @@ mips_expand_prologue ()
moment. */
if (TARGET_MIPS16 && BITSET_P (current_frame_info.mask, 18))
{
rtx reg_rtx = gen_rtx (REG, word_mode, GP_REG_FIRST + 3);
rtx reg_rtx = gen_rtx (REG, gpr_mode, GP_REG_FIRST + 3);
long gp_offset, base_offset;
gp_offset = current_frame_info.gp_sp_offset;
@ -6394,8 +6403,8 @@ mips_expand_prologue ()
base_offset = 0;
start_sequence ();
emit_move_insn (reg_rtx,
gen_rtx (REG, word_mode, GP_REG_FIRST + 18));
emit_move_insn (gen_rtx (MEM, word_mode,
gen_rtx (REG, gpr_mode, GP_REG_FIRST + 18));
emit_move_insn (gen_rtx (MEM, gpr_mode,
gen_rtx (PLUS, Pmode, stack_pointer_rtx,
GEN_INT (gp_offset
- base_offset))),