diff options
Diffstat (limited to 'sysdeps/i386/i586/memcpy.S')
| -rw-r--r-- | sysdeps/i386/i586/memcpy.S | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/sysdeps/i386/i586/memcpy.S b/sysdeps/i386/i586/memcpy.S index 9116c8d741..82d5e79564 100644 --- a/sysdeps/i386/i586/memcpy.S +++ b/sysdeps/i386/i586/memcpy.S @@ -1,5 +1,5 @@ /* Highly optimized version for i586. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -20,23 +20,31 @@ #include <sysdep.h> #include "asm-syntax.h" +#include "bp-asm.h" -/* - INPUT PARAMETERS: - dst (sp + 4) - src (sp + 8) - len (sp + 12) -*/ +/* BEWARE: `#ifdef memset' means that memset is redefined as `bzero' */ +#define BCOPY_P (defined memcpy) +#define PARMS LINKAGE+8 /* space for 2 saved regs */ +#if BCOPY_P +# define DEST PARMS +#else +# define RTN PARMS +# define DEST RTN+RTN_SIZE +#endif +#define SRC DEST+PTR_SIZE +#define LEN SRC+PTR_SIZE .text ENTRY (memcpy) + ENTER + pushl %edi pushl %esi - movl 12(%esp), %edi /* dst */ - movl 16(%esp), %esi /* src */ - movl 20(%esp), %ecx /* len */ + movl DEST(%esp), %edi + movl SRC(%esp), %esi + movl LEN(%esp), %ecx movl %edi, %eax /* We need this in any case. */ @@ -91,18 +99,23 @@ L(3): movl 28(%edi), %edx /* Correct extra loop counter modification. */ L(2): addl $32, %ecx -#ifndef memcpy - movl 12(%esp), %eax /* dst */ +#if !BCOPY_P + movl DEST(%esp), %eax #endif L(1): rep; movsb -#ifdef memcpy +#if BCOPY_P movl %edi, %eax #endif popl %esi popl %edi + LEAVE +#if BCOPY_P ret +#else + RET_PTR +#endif END (memcpy) |