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author | Greg McGary <greg@mcgary.org> | 2000-06-09 06:14:39 +0000 |
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committer | Greg McGary <greg@mcgary.org> | 2000-06-09 06:14:39 +0000 |
commit | 3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03 (patch) | |
tree | a193d5f40640e64b7b6555e831772c1934e2a8d0 /sysdeps/i386/i686/memset.S | |
parent | a40fb915f89d0e225058c0865de4504f83f90173 (diff) | |
download | glibc-3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03.zip glibc-3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03.tar.gz glibc-3f02f778cdbec7d95e0a9d6f9368ce9cda0a6d03.tar.bz2 |
* 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/i686/memset.S')
-rw-r--r-- | sysdeps/i386/i686/memset.S | 47 |
1 files changed, 30 insertions, 17 deletions
diff --git a/sysdeps/i386/i686/memset.S b/sysdeps/i386/i686/memset.S index 83f8c50..74ce87b 100644 --- a/sysdeps/i386/i686/memset.S +++ b/sysdeps/i386/i686/memset.S @@ -1,6 +1,6 @@ /* memset/bzero -- set memory area to CH/0 Highly optimized version for ix86, x>=6. - Copyright (C) 1999 Free Software Foundation, Inc. + Copyright (C) 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. @@ -21,27 +21,34 @@ #include <sysdep.h> #include "asm-syntax.h" +#include "bp-asm.h" -/* - INPUT PARAMETERS: - (memset) (bzero) - dst (sp + 4) dst (sp + 4) - ch (sp + 8) len (sp + 8) - len (sp + 12) -*/ +/* BEWARE: `#ifdef memset' means that memset is redefined as `bzero' */ +#define BZERO_P (defined memset) +#define PARMS LINKAGE+4 /* space for 1 saved reg */ +#if BZERO_P +# define DEST PARMS +# define LEN DEST+PTR_SIZE +#else +# define RTN PARMS +# define DEST RTN+RTN_SIZE +# define CHR DEST+PTR_SIZE +# define LEN CHR+4 +#endif .text ENTRY (memset) + ENTER + cld pushl %edi - movl 8(%esp), %edx -#ifdef memset - movl 12(%esp), %ecx - xorl %eax, %eax + movl DEST(%esp), %edx + movl LEN(%esp), %ecx +#if BZERO_P + xorl %eax, %eax /* fill with 0 */ #else - movzbl 12(%esp), %eax - movl 16(%esp), %ecx + movzbl CHR(%esp), %eax #endif jecxz 1f movl %edx, %edi @@ -61,7 +68,7 @@ ENTRY (memset) 2: movl %ecx, %edx shrl $2, %ecx andl $3, %edx -#ifndef memset +#if !BZERO_P imul $0x01010101, %eax #endif rep @@ -71,9 +78,15 @@ ENTRY (memset) stosb 1: -#ifndef memset - movl 8(%esp), %eax +#if !BZERO_P + movl DEST(%esp), %eax #endif popl %edi + + LEAVE +#if BZERO_P ret +#else + RET_PTR +#endif END (memset) |