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| author | Ulrich Drepper <drepper@redhat.com> | 1999-01-07 17:59:28 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1999-01-07 17:59:28 +0000 |
| commit | 7ffe2de674d95ec6cad51c3d7bf697301f8217c1 (patch) | |
| tree | df56a3d137c07fc5e9fdb8b1a4fb026fef5e1141 /sysdeps/i386/i686/memset.S | |
| parent | 997d6467bec4d5c03f79ee4c45d9f77827cca1b7 (diff) | |
| download | glibc-7ffe2de674d95ec6cad51c3d7bf697301f8217c1.tar.gz glibc-7ffe2de674d95ec6cad51c3d7bf697301f8217c1.tar.xz glibc-7ffe2de674d95ec6cad51c3d7bf697301f8217c1.zip | |
Update.
* sysdeps/i386/i686/memset.S: New file. * sysdeps/i386/i686/bzero.S: New file. 1999-01-05 Scott Bambrough <scottb@corelcomputer.com>
Diffstat (limited to 'sysdeps/i386/i686/memset.S')
| -rw-r--r-- | sysdeps/i386/i686/memset.S | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/memset.S b/sysdeps/i386/i686/memset.S new file mode 100644 index 0000000000..1f753b0350 --- /dev/null +++ b/sysdeps/i386/i686/memset.S @@ -0,0 +1,75 @@ +/* memset/bzero -- set memory area to CH/0 + Highly optimized version for ix86, x>=6. + Copyright (C) 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> +#include "asm-syntax.h" + +/* + INPUT PARAMETERS: + (memset) (bzero) + dst (sp + 4) dst (sp + 4) + ch (sp + 8) len (sp + 8) + len (sp + 12) +*/ + + + .text +ENTRY (memset) + cld + pushl %edi + movl 8(%esp), %edx +#ifdef memset + movl 12(%esp), %ecx + xorl %eax, %eax +#else + movzbl 12(%esp), %eax + movl 16(%esp), %ecx +#endif + jecxz 1f + movl %edx, %edi + andl $3, %edx + jz 2f + jnp 3f + stosb + decl %ecx + jz 1f +3: stosb + decl %ecx + jz 1f + xorl $3, %edx + jz 2f + stosb + decl %ecx +2: movl %ecx, %edx + shrl $2, %ecx + andl $3, %edx +#ifndef memset + imul $0x01010101, %eax +#endif + rep + stosl + movl %edx, %ecx + rep + stosb + +1: movl 8(%esp), %eax + popl %edi + ret +END (memset) |