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| author | Will Schmidt <will_schmidt@vnet.ibm.com> | 2011-09-07 21:56:57 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-09-07 21:56:57 -0400 |
| commit | 2270037782b05f2973372fe12f6e8d2a8c413188 (patch) | |
| tree | cc3855afd057f3ce5d1b130461050b200619eede | |
| parent | 5025581e1c66a184a587ab1bd99cd168e8fb7770 (diff) | |
| download | glibc-2270037782b05f2973372fe12f6e8d2a8c413188.tar glibc-2270037782b05f2973372fe12f6e8d2a8c413188.tar.gz glibc-2270037782b05f2973372fe12f6e8d2a8c413188.tar.bz2 glibc-2270037782b05f2973372fe12f6e8d2a8c413188.zip | |
power7 strncmp optimization
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power7/strncmp.S | 4 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/power7/strncmp.S | 4 |
3 files changed, 12 insertions, 2 deletions
@@ -1,3 +1,9 @@ +2011-08-04 Will Schmidt <will_schmidt@vnet.ibm.com> + + * sysdeps/powerpc/powerpc32/power7/strncmp.S: Adjust the alignment + and add nop instructions for throughput optimization. + * sysdeps/powerpc/powerpc64/power7/strncmp.S: Likewise. + 2011-07-28 Will Schmidt <will_schmidt@vnet.ibm.com> * sysdeps/powerpc/powerpc32/power7/memcpy.S: Optimize the diff --git a/sysdeps/powerpc/powerpc32/power7/strncmp.S b/sysdeps/powerpc/powerpc32/power7/strncmp.S index 6a1422a7c8..bcd13b6fa6 100644 --- a/sysdeps/powerpc/powerpc32/power7/strncmp.S +++ b/sysdeps/powerpc/powerpc32/power7/strncmp.S @@ -27,7 +27,7 @@ const char *s2 [r4], size_t size [r5]) */ -EALIGN (BP_SYM(strncmp),4,0) +EALIGN (BP_SYM(strncmp),5,0) #define rTMP r0 #define rRTN r3 @@ -47,9 +47,11 @@ EALIGN (BP_SYM(strncmp),4,0) #define rBITDIF r11 /* bits that differ in s1 & s2 words */ dcbt 0,rSTR1 + nop or rTMP,rSTR2,rSTR1 lis r7F7F,0x7f7f dcbt 0,rSTR2 + nop clrlwi. rTMP,rTMP,30 cmplwi cr1,rN,0 lis rFEFE,-0x101 diff --git a/sysdeps/powerpc/powerpc64/power7/strncmp.S b/sysdeps/powerpc/powerpc64/power7/strncmp.S index 498b19c71c..4c02b115ac 100644 --- a/sysdeps/powerpc/powerpc64/power7/strncmp.S +++ b/sysdeps/powerpc/powerpc64/power7/strncmp.S @@ -27,7 +27,7 @@ const char *s2 [r4], size_t size [r5]) */ -EALIGN (BP_SYM(strncmp),4,0) +EALIGN (BP_SYM(strncmp),5,0) CALL_MCOUNT 3 #define rTMP r0 @@ -48,9 +48,11 @@ EALIGN (BP_SYM(strncmp),4,0) #define rBITDIF r11 /* bits that differ in s1 & s2 words */ dcbt 0,rSTR1 + nop or rTMP,rSTR2,rSTR1 lis r7F7F,0x7f7f dcbt 0,rSTR2 + nop clrldi. rTMP,rTMP,61 cmpldi cr1,rN,0 lis rFEFE,-0x101 |