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| author | Greg McGary <greg@mcgary.org> | 2000-06-09 06:14:39 +0000 |
|---|---|---|
| committer | Greg McGary <greg@mcgary.org> | 2000-06-09 06:14:39 +0000 |
| commit | 3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03 (patch) | |
| tree | a193d5f40640e64b7b6555e831772c1934e2a8d0 /sysdeps/i386/strchr.S | |
| parent | a40fb915f89d0e225058c0865de4504f83f90173 (diff) | |
| download | glibc-3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03.tar.gz glibc-3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03.tar.xz glibc-3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03.zip | |
* sysdeps/i386/bp-asm.h: New file.
* sysdeps/i386/__longjmp.S: Define & use symbolic argument stack offsets. Add ENTER/LEAVE macros for optionally maintaining frame-pointer chain when debugging. * sysdeps/i386/add_n.S: Likewise. * sysdeps/i386/addmul_1.S: Likewise. * sysdeps/i386/lshift.S: Likewise. * sysdeps/i386/memchr.S: Likewise. * sysdeps/i386/memcmp.S: Likewise. * sysdeps/i386/mul_1.S: Likewise. * sysdeps/i386/rawmemchr.S: Likewise. * sysdeps/i386/rshift.S: Likewise. * sysdeps/i386/stpcpy.S: Likewise. * sysdeps/i386/stpncpy.S: Likewise. * sysdeps/i386/strchr.S: Likewise. * sysdeps/i386/strchrnul.S: Likewise. * sysdeps/i386/strcspn.S: Likewise. * sysdeps/i386/strpbrk.S: Likewise. * sysdeps/i386/strrchr.S: Likewise. * sysdeps/i386/strspn.S: Likewise. * sysdeps/i386/strtok.S: Likewise. * sysdeps/i386/sub_n.S: Likewise. * sysdeps/i386/submul_1.S: Likewise. * sysdeps/i386/elf/setjmp.S: Likewise. * sysdeps/i386/i486/strcat.S: Likewise. * sysdeps/i386/i486/strlen.S: Likewise. * sysdeps/i386/i586/add_n.S: Likewise. * sysdeps/i386/i586/lshift.S: Likewise. * sysdeps/i386/i586/memcpy.S: Likewise. * sysdeps/i386/i586/memset.S: Likewise. * sysdeps/i386/i586/rshift.S: Likewise. * sysdeps/i386/i586/strchr.S: Likewise. * sysdeps/i386/i586/strcpy.S: Likewise. * sysdeps/i386/i586/strlen.S: Likewise. * sysdeps/i386/i586/sub_n.S: Likewise. * sysdeps/i386/i686/add_n.S: Likewise. * sysdeps/i386/i686/memcpy.S: Likewise. * sysdeps/i386/i686/mempcpy.S: Likewise. * sysdeps/i386/i686/memset.S: Likewise. * sysdeps/i386/i686/strcmp.S: Likewise. 2000-06-08 Greg McGary <greg@mcgary.org> * sysdeps/i386/bp-asm.h: New file. * sysdeps/i386/__longjmp.S: Define & use symbolic argument stack offsets. Add ENTER/LEAVE macros for optionally maintaining frame-pointer chain when debugging. * sysdeps/i386/add_n.S: Likewise. * sysdeps/i386/addmul_1.S: Likewise. * sysdeps/i386/lshift.S: Likewise. * sysdeps/i386/memchr.S: Likewise. * sysdeps/i386/memcmp.S: Likewise. * sysdeps/i386/mul_1.S: Likewise. * sysdeps/i386/rawmemchr.S: Likewise. * sysdeps/i386/rshift.S: Likewise. * sysdeps/i386/stpcpy.S: Likewise. * sysdeps/i386/stpncpy.S: Likewise. * sysdeps/i386/strchr.S: Likewise. * sysdeps/i386/strchrnul.S: Likewise. * sysdeps/i386/strcspn.S: Likewise. * sysdeps/i386/strpbrk.S: Likewise. * sysdeps/i386/strrchr.S: Likewise. * sysdeps/i386/strspn.S: Likewise. * sysdeps/i386/strtok.S: Likewise. * sysdeps/i386/sub_n.S: Likewise. * sysdeps/i386/submul_1.S: Likewise. * sysdeps/i386/elf/setjmp.S: Likewise. * sysdeps/i386/i486/strcat.S: Likewise. * sysdeps/i386/i486/strlen.S: Likewise. * sysdeps/i386/i586/add_n.S: Likewise. * sysdeps/i386/i586/lshift.S: Likewise. * sysdeps/i386/i586/memcpy.S: Likewise. * sysdeps/i386/i586/memset.S: Likewise. * sysdeps/i386/i586/rshift.S: Likewise. * sysdeps/i386/i586/strchr.S: Likewise. * sysdeps/i386/i586/strcpy.S: Likewise. * sysdeps/i386/i586/strlen.S: Likewise. * sysdeps/i386/i586/sub_n.S: Likewise. * sysdeps/i386/i686/add_n.S: Likewise. * sysdeps/i386/i686/memcpy.S: Likewise. * sysdeps/i386/i686/mempcpy.S: Likewise. * sysdeps/i386/i686/memset.S: Likewise. * sysdeps/i386/i686/strcmp.S: Likewise.
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) |