diff options
Diffstat (limited to 'sysdeps/i386/i586/strchr.S')
| -rw-r--r-- | sysdeps/i386/i586/strchr.S | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/sysdeps/i386/i586/strchr.S b/sysdeps/i386/i586/strchr.S index bc435bfe0a..8a6691f7df 100644 --- a/sysdeps/i386/i586/strchr.S +++ b/sysdeps/i386/i586/strchr.S @@ -68,21 +68,18 @@ 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 (%eax), %dl /* is byte == C? */ + movb %dl, %cl /* 0 is needed below */ + jp L0 /* exactly two bits set */ - je L2 /* aligned => return pointer */ + xorb (%eax), %cl /* is byte the one we are looking for? */ + jz L2 /* yes => return pointer */ - cmpb $0, %cl /* is byte NUL? */ + xorb %dl, %cl /* load single byte and test for NUL */ je L3 /* yes => return NULL */ - incl %eax /* increment pointer */ - xorl $3, %edi /* was alignment == 3? */ - -L0: movb (%eax), %cl /* load single byte */ - je L11 /* yes => start loop */ + movb 1(%eax), %cl /* load single byte */ + incl %eax cmpb %cl, %dl /* is byte == C? */ je L2 /* aligned => return pointer */ @@ -90,8 +87,12 @@ L0: movb (%eax), %cl /* load single byte */ cmpb $0, %cl /* is byte NUL? */ je L3 /* yes => return NULL */ - movb 1(%eax), %cl /* load single byte */ - incl %eax /* increment pointer */ + incl %eax + decl %edi + + jne L11 + +L0: movb (%eax), %cl /* load single byte */ cmpb %cl, %dl /* is byte == C? */ je L2 /* aligned => return pointer */ |