mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-03-23 00:41:25 +08:00
Code Issues Packages Projects Releases Wiki Activity

i386.c (ix86_rtx_costs): Drop NEG from sub for FMA.

Browse Source 
* config/i386/i386.c (ix86_rtx_costs): Drop NEG from sub for FMA.
* config/i386/sse.md: Add n to negated FMA pattern names.

From-SVN: r174493
This commit is contained in:
Alexandre Oliva 2011-05-31 16:25:15 +00:00 committed by Alexandre Oliva
parent 28c14a046d
commit f330841314
3 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2011-05-31 Alexandre Oliva <aoliva@redhat.com>
* config/i386/i386.c (ix86_rtx_costs): Drop NEG from sub for FMA.
* config/i386/sse.md: Add n to negated FMA pattern names.
2011-05-31 Alexandre Oliva <aoliva@redhat.com>
* gcc.c (driver_handle_option): Fix disabling of -fcompare-debug.

4
gcc/config/i386/i386.c
View File

@ -29226,12 +29226,12 @@ ix86_rtx_costs (rtx x, int code, int outer_code_i, int *total, bool speed)
/* Negate in op0 or op2 is free: FMS, FNMA, FNMS. */
sub = XEXP (x, 0);
if (GET_CODE (sub) == NEG)
sub = XEXP (x, 0);
sub = XEXP (sub, 0);
*total += rtx_cost (sub, FMA, speed);
sub = XEXP (x, 2);
if (GET_CODE (sub) == NEG)
sub = XEXP (x, 0);
sub = XEXP (sub, 0);
*total += rtx_cost (sub, FMA, speed);
return true;
}

4
gcc/config/i386/sse.md
View File

@ -1731,7 +1731,7 @@
[(set_attr "type" "ssemuladd")
(set_attr "mode" "<MODE>")])
(define_insn "*fma_fmadd_<mode>"
(define_insn "*fma_fnmadd_<mode>"
[(set (match_operand:FMAMODE 0 "register_operand" "=x,x,x")
(fma:FMAMODE
(neg:FMAMODE
@ -1746,7 +1746,7 @@
[(set_attr "type" "ssemuladd")
(set_attr "mode" "<MODE>")])
(define_insn "*fma_fmsub_<mode>"
(define_insn "*fma_fnmsub_<mode>"
[(set (match_operand:FMAMODE 0 "register_operand" "=x,x,x")
(fma:FMAMODE
(neg:FMAMODE