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i386.c (output_fp_compare): Add generation of ftst instruction. 

* config/i386/i386.c (output_fp_compare): Add generation
	of ftst instruction.
	* config/i386/i386.md (*cmpfp_0_sf, cmpfp_0_df, cmpfp_0_xf):
	Use output_fp_compare () function.
	(cmpfp_i, *cmpfp_i_sse, *cmpfp_i_sse_only): Fix insn constraint.
	(fix_truncdi_memory): Remove operands[5] copy.

From-SVN: r87482
This commit is contained in:
Uros Bizjak 2004-09-14 07:21:51 +02:00 committed by Uros Bizjak
parent 19525b57d1
commit 869d095e24
3 changed files with 35 additions and 34 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2004-09-14 Uros Bizjak <uros@kss-loka.si>
* config/i386/i386.c (output_fp_compare): Add generation
of ftst instruction.
* config/i386/i386.md (*cmpfp_0_sf, cmpfp_0_df, cmpfp_0_xf):
Use output_fp_compare () function.
(cmpfp_i, *cmpfp_i_sse, *cmpfp_i_sse_only): Fix insn constraint.
(fix_truncdi_memory): Remove operands[5] copy.
2004-09-14 Kazu Hirata <kazu@cs.umass.edu>
* config/m32r/m32r.md, config/m68k/m68kelf.h,

22
gcc/config/i386/i386.c
View File

@ -7228,15 +7228,20 @@ const char *
output_fp_compare (rtx insn, rtx *operands, int eflags_p, int unordered_p)
{
int stack_top_dies;
rtx cmp_op0 = operands[0];
rtx cmp_op1 = operands[1];
rtx cmp_op0, cmp_op1;
int is_sse = SSE_REG_P (operands[0]) | SSE_REG_P (operands[1]);
if (eflags_p == 2)
{
cmp_op0 = cmp_op1;
cmp_op0 = operands[1];
cmp_op1 = operands[2];
}
else
{
cmp_op0 = operands[0];
cmp_op1 = operands[1];
}
if (is_sse)
{
if (GET_MODE (operands[0]) == SFmode)
@ -7256,6 +7261,17 @@ output_fp_compare (rtx insn, rtx *operands, int eflags_p, int unordered_p)
stack_top_dies = find_regno_note (insn, REG_DEAD, FIRST_STACK_REG) != 0;
if (cmp_op1 == CONST0_RTX (GET_MODE (cmp_op1)))
{
if (stack_top_dies)
{
output_asm_insn ("ftst\n\tfnstsw\t%0", operands);
return TARGET_USE_FFREEP ? "ffreep\t%y1" : "fstp\t%y1";
}
else
return "ftst\n\tfnstsw\t%0";
}
if (STACK_REG_P (cmp_op1)
&& stack_top_dies
&& find_regno_note (insn, REG_DEAD, REGNO (cmp_op1))

38
gcc/config/i386/i386.md
View File

@ -805,15 +805,7 @@
(match_operand:SF 2 "const0_operand" "X"))]
UNSPEC_FNSTSW))]
"TARGET_80387"
{
if (find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
{
output_asm_insn ("ftst\;fnstsw\t%0", operands);
return TARGET_USE_FFREEP ? "ffreep\t%y1" : "fstp\t%y1";
}
else
return "ftst\;fnstsw\t%0";
}
"* return output_fp_compare (insn, operands, 2, 0);"
[(set_attr "type" "multi")
(set_attr "mode" "SF")])
@ -825,15 +817,7 @@
(match_operand:DF 2 "const0_operand" "X"))]
UNSPEC_FNSTSW))]
"TARGET_80387"
{
if (find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
{
output_asm_insn ("ftst\;fnstsw\t%0", operands);
return TARGET_USE_FFREEP ? "ffreep\t%y1" : "fstp\t%y1";
}
else
return "ftst\;fnstsw\t%0";
}
"* return output_fp_compare (insn, operands, 2, 0);"
[(set_attr "type" "multi")
(set_attr "mode" "DF")])
@ -845,15 +829,7 @@
(match_operand:XF 2 "const0_operand" "X"))]
UNSPEC_FNSTSW))]
"TARGET_80387"
{
if (find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
{
output_asm_insn ("ftst\;fnstsw\t%0", operands);
return TARGET_USE_FFREEP ? "ffreep\t%y1" : "fstp\t%y1";
}
else
return "ftst\;fnstsw\t%0";
}
"* return output_fp_compare (insn, operands, 2, 0);"
[(set_attr "type" "multi")
(set_attr "mode" "XF")])
@ -1032,7 +1008,7 @@
"TARGET_80387 && TARGET_CMOVE
&& !SSE_FLOAT_MODE_P (GET_MODE (operands[0]))
&& FLOAT_MODE_P (GET_MODE (operands[0]))
&& GET_MODE (operands[0]) == GET_MODE (operands[0])"
&& GET_MODE (operands[0]) == GET_MODE (operands[1])"
"* return output_fp_compare (insn, operands, 1, 0);"
[(set_attr "type" "fcmp")
(set (attr "mode")
@ -1050,7 +1026,7 @@
(match_operand 1 "nonimmediate_operand" "f#x,xm#f")))]
"TARGET_80387
&& SSE_FLOAT_MODE_P (GET_MODE (operands[0]))
&& GET_MODE (operands[0]) == GET_MODE (operands[0])"
&& GET_MODE (operands[0]) == GET_MODE (operands[1])"
"* return output_fp_compare (insn, operands, 1, 0);"
[(set_attr "type" "fcmp,ssecomi")
(set (attr "mode")
@ -1064,7 +1040,7 @@
(compare:CCFP (match_operand 0 "register_operand" "x")
(match_operand 1 "nonimmediate_operand" "xm")))]
"SSE_FLOAT_MODE_P (GET_MODE (operands[0]))
&& GET_MODE (operands[0]) == GET_MODE (operands[0])"
&& GET_MODE (operands[0]) == GET_MODE (operands[1])"
"* return output_fp_compare (insn, operands, 1, 0);"
[(set_attr "type" "ssecomi")
(set (attr "mode")
@ -4161,7 +4137,7 @@
(clobber (match_scratch:DF 4 "=&1f"))]
"TARGET_80387 && FLOAT_MODE_P (GET_MODE (operands[1]))
&& (!SSE_FLOAT_MODE_P (GET_MODE (operands[1])) || !TARGET_64BIT)"
"* operands[5] = operands[4]; return output_fix_trunc (insn, operands);"
"* return output_fix_trunc (insn, operands);"
[(set_attr "type" "fistp")
(set_attr "i387_cw" "trunc")
(set_attr "mode" "DI")])