diff options
Diffstat (limited to 'sysdeps/i386/i586/strchr.S')
| -rw-r--r-- | sysdeps/i386/i586/strchr.S | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/sysdeps/i386/i586/strchr.S b/sysdeps/i386/i586/strchr.S index 30de6b069d..100cbbc706 100644 --- a/sysdeps/i386/i586/strchr.S +++ b/sysdeps/i386/i586/strchr.S @@ -1,6 +1,6 @@ /* strchr -- find character CH in a NUL terminated string. Highly optimized version for ix85, x>=5. -Copyright (C) 1995 Free Software Foundation, Inc. +Copyright (C) 1995, 1996 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>. @@ -68,9 +68,10 @@ ENTRY (strchr) andl $3, %edi /* mask alignment bits */ jz L11 /* alignment is 0 => start loop */ + jp L0 /* exactly two bits set */ movb (%eax), %cl /* load single byte */ - cmpb %cl, %dl /* is byte == C? */ + cmpb (%eax), %dl /* is byte == C? */ je L2 /* aligned => return pointer */ @@ -78,26 +79,21 @@ ENTRY (strchr) je L3 /* yes => return NULL */ incl %eax /* increment pointer */ - cmp $3, %edi /* was alignment == 3? */ + xorl $3, %edi /* was alignment == 3? */ +L0: movb (%eax), %cl /* load single byte */ je L11 /* yes => start loop */ - movb (%eax), %cl /* load single byte */ cmpb %cl, %dl /* is byte == C? */ - je L2 /* aligned => return pointer */ cmpb $0, %cl /* is byte NUL? */ je L3 /* yes => return NULL */ + movb 1(%eax), %cl /* load single byte */ incl %eax /* increment pointer */ - cmp $2, %edi /* was alignment == 2? */ - je L11 /* yes => start loop */ - - movb (%eax), %cl /* load single byte */ cmpb %cl, %dl /* is byte == C? */ - je L2 /* aligned => return pointer */ cmpb $0, %cl /* is byte NUL? */ |