diff options
| author | Varvara Rainchik <varvara.rainchik@intel.com> | 2014-04-24 15:41:20 +0400 |
|---|---|---|
| committer | Christopher Ferris <cferris@google.com> | 2014-05-12 13:56:59 -0700 |
| commit | 5a92284167ffba6d45210ef6889fa7d255c15d4f (patch) | |
| tree | 0ab0ebc49463cc1bdcad12f96ee12c5acbe51cc1 /libc/arch-x86/string/swab.S | |
| parent | ebcc72070499b2ab2d1dee990d6f52814a56600e (diff) | |
| download | bionic-5a92284167ffba6d45210ef6889fa7d255c15d4f.zip bionic-5a92284167ffba6d45210ef6889fa7d255c15d4f.tar.gz bionic-5a92284167ffba6d45210ef6889fa7d255c15d4f.tar.bz2 | |
Add 32-bit Silvermont-optimized string/memory functions.
Add following functions:
bcopy, memcpy, memmove, memset, bzero, memcmp, wmemcmp, strlen,
strcpy, strncpy, stpcpy, stpncpy.
Create new directories inside arch-x86 to specify architecture: atom,
silvermont and generic (non atom or silvermont architectures are treated like generic).
Due to introducing optimized versions of stpcpy and stpncpy,
c-implementations of these functions are moved from
common for architectures makefile to arm and mips specific makefiles.
Change-Id: I990f8061c3e9bca1f154119303da9e781c5d086e
Signed-off-by: Varvara Rainchik <varvara.rainchik@intel.com>
Diffstat (limited to 'libc/arch-x86/string/swab.S')
| -rw-r--r-- | libc/arch-x86/string/swab.S | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/libc/arch-x86/string/swab.S b/libc/arch-x86/string/swab.S deleted file mode 100644 index b44d134..0000000 --- a/libc/arch-x86/string/swab.S +++ /dev/null @@ -1,68 +0,0 @@ -/* $OpenBSD: swab.S,v 1.3 2005/08/07 11:30:38 espie Exp $ */ -/* - * Written by J.T. Conklin <jtc@netbsd.org>. - * Public domain. - */ - -#include <private/bionic_asm.h> - -/* - * On the i486, this code is negligibly faster than the code generated - * by gcc at about half the size. If my i386 databook is correct, it - * should be considerably faster than the gcc code on a i386. - */ - -ENTRY(swab) - pushl %esi - pushl %edi - movl 12(%esp),%esi - movl 16(%esp),%edi - movl 20(%esp),%ecx - - cld # set direction forward - - shrl $1,%ecx - testl $7,%ecx # copy first group of 1 to 7 words - jz L2 # while swaping alternate bytes. - .align 2,0x90 -L1: lodsw - rorw $8,%ax - stosw - decl %ecx - testl $7,%ecx - jnz L1 - -L2: shrl $3,%ecx # copy remainder 8 words at a time - jz L4 # while swapping alternate bytes. - .align 2,0x90 -L3: lodsw - rorw $8,%ax - stosw - lodsw - rorw $8,%ax - stosw - lodsw - rorw $8,%ax - stosw - lodsw - rorw $8,%ax - stosw - lodsw - rorw $8,%ax - stosw - lodsw - rorw $8,%ax - stosw - lodsw - rorw $8,%ax - stosw - lodsw - rorw $8,%ax - stosw - decl %ecx - jnz L3 - -L4: popl %edi - popl %esi - ret -END(swab) |