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[Bug middle-end/39976] [4.5 Regression] Big sixtrack degradation on powerpc 32/64 after revision r146817
- From: "luisgpm at linux dot vnet dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Apr 2009 19:29:53 -0000
- Subject: [Bug middle-end/39976] [4.5 Regression] Big sixtrack degradation on powerpc 32/64 after revision r146817
- References: <bug-39976-16550@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from luisgpm at linux dot vnet dot ibm dot com 2009-04-30 19:29 -------
ASM code for the bad loop
.L145:
fmul 10,8,13
fmul 5,8,0
addis 3,4,0xffe5
lfd 22,8(7)
addi 7,4,8
lfd 6,9472(3)
fmadd 10,9,0,10
fmsub 23,9,13,5
fmul 2,10,22
fmul 9,10,6
fmr 7,23
fmsub 25,23,6,2
fmadd 26,23,22,9
fadd 12,12,25
fadd 11,11,26
.L93:
fmul 8,10,13
fmul 22,10,0
addis 3,7,0xffe5
lfd 21,0(7)
addi 4,7,8
lfd 25,9472(3)
fmadd 8,7,0,8
fmsub 9,7,13,22
fmul 23,8,21
fmul 26,8,25
fmsub 24,9,25,23
fmadd 7,9,21,26
fadd 12,12,24
fadd 11,11,7
bdnz .L145
stfd 9,472(1)
mr 7,8
lwz 3,472(1)
lwz 4,476(1)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39976