diff options
Diffstat (limited to 'sysdeps/i386/strchr.S')
| -rw-r--r-- | sysdeps/i386/strchr.S | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/sysdeps/i386/strchr.S b/sysdeps/i386/strchr.S index 582c3d737a..0bb28bc9be 100644 --- a/sysdeps/i386/strchr.S +++ b/sysdeps/i386/strchr.S @@ -1,6 +1,6 @@ /* strchr (str, ch) -- Return pointer to first occurrence of CH in STR. For Intel 80x86, x>=3. - Copyright (C) 1994, 1995, 1996, 1997, 1999 Free Software Foundation, Inc. + Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu> Some optimisations by Alan Modra <Alan@SPRI.Levels.UniSA.Edu.Au> @@ -22,19 +22,20 @@ #include <sysdep.h> #include "asm-syntax.h" +#include "bp-asm.h" -/* - INPUT PARAMETERS: - str (sp + 4) - ch (sp + 8) -*/ +#define PARMS LINKAGE+4 /* space for 1 saved reg */ +#define RTN PARMS +#define STR RTN+RTN_SIZE +#define CHR STR+PTR_SIZE .text ENTRY (strchr) - pushl %edi /* Save callee-safe registers used here. */ + ENTER - movl 8(%esp), %eax /* get string pointer */ - movl 12(%esp), %edx /* get character we are looking for */ + pushl %edi /* Save callee-safe registers used here. */ + movl STR(%esp), %eax + movl CHR(%esp), %edx /* At the moment %edx contains C. What we need for the algorithm is C in all bytes of the dword. Avoid @@ -240,7 +241,9 @@ L(11): movl (%eax), %ecx /* get word (= 4 bytes) in question */ L(2): /* Return NULL. */ xorl %eax, %eax /* load NULL in return value register */ popl %edi /* restore saved register content */ - ret + + LEAVE + RET_PTR L(73): addl $4, %eax /* adjust pointer */ L(72): addl $4, %eax @@ -273,7 +276,8 @@ L(7): testb %cl, %cl /* is first byte C? */ L(6): popl %edi /* restore saved register content */ - ret + LEAVE + RET_PTR END (strchr) weak_alias (strchr, index) |