diff options
Diffstat (limited to 'sysdeps/i386/rawmemchr.S')
| -rw-r--r-- | sysdeps/i386/rawmemchr.S | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/sysdeps/i386/rawmemchr.S b/sysdeps/i386/rawmemchr.S index 83626e0473..89ba8d3857 100644 --- a/sysdeps/i386/rawmemchr.S +++ b/sysdeps/i386/rawmemchr.S @@ -1,6 +1,6 @@ /* rawmemchr (str, ch) -- Return pointer to first occurrence of CH in STR. For Intel 80x86, x>=3. - Copyright (C) 1994, 95, 96, 97, 98, 99 Free Software Foundation, Inc. + Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu> Optimised a little by Alan Modra <Alan@SPRI.Levels.UniSA.Edu.Au> @@ -31,21 +31,23 @@ #include <sysdep.h> #include "asm-syntax.h" +#include "bp-asm.h" -/* - INPUT PARAMETERS: - str (sp + 4) - c (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 (__rawmemchr) + ENTER + /* Save callee-safe register used in this function. */ pushl %edi /* Load parameters into registers. */ - movl 8(%esp), %eax /* str: pointer to memory block. */ - movl 12(%esp), %edx /* c: byte we are looking for. */ + 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 @@ -213,6 +215,7 @@ L(8): testb %cl, %cl /* test first byte in dword */ L(9): popl %edi /* pop saved register */ + LEAVE ret END (__rawmemchr) weak_alias (__rawmemchr, rawmemchr) |