From: Will Schmidt Date: Thu, 8 Sep 2011 01:56:57 +0000 (-0400) Subject: power7 strncmp optimization X-Git-Tag: upstream/2.30~12107 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2270037782b05f2973372fe12f6e8d2a8c413188;p=external%2Fglibc.git power7 strncmp optimization --- diff --git a/ChangeLog b/ChangeLog index 429767d..1ed1e58 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2011-08-04 Will Schmidt + + * 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 * 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 6a1422a..bcd13b6 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 498b19c..4c02b11 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