diff options
Diffstat (limited to 'sysdeps/i386/i586/memset.S')
| -rw-r--r-- | sysdeps/i386/i586/memset.S | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/sysdeps/i386/i586/memset.S b/sysdeps/i386/i586/memset.S index 01bed35534..8b292e92fa 100644 --- a/sysdeps/i386/i586/memset.S +++ b/sysdeps/i386/i586/memset.S @@ -1,6 +1,6 @@ /* memset/bzero -- set memory area to CH/0 Highly optimized version for ix86, x>=5. - Copyright (C) 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Torbjorn Granlund, <tege@matematik.su.se> @@ -21,27 +21,33 @@ #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 */ +#define RTN PARMS +#define DEST RTN+RTN_SIZE +#if BZERO_P +# define LEN DEST+PTR_SIZE +#else +# define CHR DEST+PTR_SIZE +# define LEN CHR+4 +#endif .text ENTRY (memset) + ENTER + pushl %edi - movl 8(%esp), %edi /* destination pointer */ -#ifdef memset + movl DEST(%esp), %edi + movl LEN(%esp), %edx +#if BZERO_P xorl %eax, %eax /* we fill with 0 */ - movl 12(%esp), %edx /* size (in 8-bit words) */ #else - movb 12(%esp), %al /* use CH to fill */ - movl 16(%esp), %edx /* size (in 8-bit words) */ + movb CHR(%esp), %al movb %al, %ah movl %eax, %ecx @@ -93,11 +99,16 @@ L(2): shrl $2, %ecx /* convert byte count to longword count */ rep stosb +#if !BZERO_P /* Load result (only if used as memset). */ -#ifndef memset - movl 8(%esp), %eax + movl DEST(%esp), %eax #endif popl %edi + LEAVE +#if BZERO_P ret +#else + RET_PTR +#endif END (memset) |