Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-23 12:42:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

sparc: Unify strlen assembler.

Browse Source 
Use the new asm/asm.h header to help commonize the
strlen assembler between 32-bit and 64-bit

While we're here, use proper linux/linkage.h macros
instead of by-hand stuff.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-12-09 01:07:09 -08:00
parent 5c03d59091
commit ae984d72e0
3 changed files with 21 additions and 102 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/sparc/lib/Makefile
View File

@ -6,7 +6,7 @@ ccflags-y := -Werror
lib-$(CONFIG_SPARC32) += mul.o rem.o sdiv.o udiv.o umul.o urem.o ashrdi3.o
lib-$(CONFIG_SPARC32) += memcpy.o memset.o
lib-y += strlen_$(BITS).o
lib-y += strlen.o
lib-y += checksum_$(BITS).o
lib-$(CONFIG_SPARC32) += blockops.o
lib-y += memscan_$(BITS).o memcmp_$(BITS).o strncmp_$(BITS).o

40
arch/sparc/lib/strlen_64.S → arch/sparc/lib/strlen.S
View File

@ -1,37 +1,38 @@
/* strlen.S: Sparc64 optimized strlen code
/* strlen.S: Sparc optimized strlen code
* Hand optimized from GNU libc's strlen
* Copyright (C) 1991,1996 Free Software Foundation
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996,2008 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996, 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/linkage.h>
#include <asm/asm.h>
#define LO_MAGIC 0x01010101
#define HI_MAGIC 0x80808080
.align 32
.globl strlen
.type strlen,#function
strlen:
.text
ENTRY(strlen)
mov %o0, %o1
andcc %o0, 3, %g0
be,pt %icc, 9f
BRANCH32(be, pt, 9f)
sethi %hi(HI_MAGIC), %o4
ldub [%o0], %o5
brz,pn %o5, 11f
BRANCH_REG_ZERO(pn, %o5, 11f)
add %o0, 1, %o0
andcc %o0, 3, %g0
be,pn %icc, 4f
BRANCH32(be, pn, 4f)
or %o4, %lo(HI_MAGIC), %o3
ldub [%o0], %o5
brz,pn %o5, 12f
BRANCH_REG_ZERO(pn, %o5, 12f)
add %o0, 1, %o0
andcc %o0, 3, %g0
be,pt %icc, 5f
BRANCH32(be, pt, 5f)
sethi %hi(LO_MAGIC), %o4
ldub [%o0], %o5
brz,pn %o5, 13f
BRANCH_REG_ZERO(pn, %o5, 13f)
add %o0, 1, %o0
ba,pt %icc, 8f
BRANCH32(ba, pt, 8f)
or %o4, %lo(LO_MAGIC), %o2
9:
or %o4, %lo(HI_MAGIC), %o3
@ -44,24 +45,24 @@ strlen:
2:
sub %o5, %o2, %o4
andcc %o4, %o3, %g0
be,pt %icc, 8b
BRANCH32(be, pt, 8b)
add %o0, 4, %o0
/* Check every byte. */
srl %o5, 24, %g7
andcc %g7, 0xff, %g0
be,pn %icc, 1f
BRANCH32(be, pn, 1f)
add %o0, -4, %o4
srl %o5, 16, %g7
andcc %g7, 0xff, %g0
be,pn %icc, 1f
BRANCH32(be, pn, 1f)
add %o4, 1, %o4
srl %o5, 8, %g7
andcc %g7, 0xff, %g0
be,pn %icc, 1f
BRANCH32(be, pn, 1f)
add %o4, 1, %o4
andcc %o5, 0xff, %g0
bne,a,pt %icc, 2b
BRANCH32_ANNUL(bne, pt, 2b)
ld [%o0], %o5
add %o4, 1, %o4
1:
@ -76,5 +77,4 @@ strlen:
13:
retl
mov 2, %o0
.size strlen, .-strlen
ENDPROC(strlen)

81
arch/sparc/lib/strlen_32.S
View File

@ -1,81 +0,0 @@
/* strlen.S: Sparc optimized strlen code
* Hand optimized from GNU libc's strlen
* Copyright (C) 1991,1996 Free Software Foundation
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#define LO_MAGIC 0x01010101
#define HI_MAGIC 0x80808080
0:
ldub [%o0], %o5
cmp %o5, 0
be 1f
add %o0, 1, %o0
andcc %o0, 3, %g0
be 4f
or %o4, %lo(HI_MAGIC), %o3
ldub [%o0], %o5
cmp %o5, 0
be 2f
add %o0, 1, %o0
andcc %o0, 3, %g0
be 5f
sethi %hi(LO_MAGIC), %o4
ldub [%o0], %o5
cmp %o5, 0
be 3f
add %o0, 1, %o0
b 8f
or %o4, %lo(LO_MAGIC), %o2
1:
retl
mov 0, %o0
2:
retl
mov 1, %o0
3:
retl
mov 2, %o0
.align 4
.global strlen
strlen:
mov %o0, %o1
andcc %o0, 3, %g0
bne 0b
sethi %hi(HI_MAGIC), %o4
or %o4, %lo(HI_MAGIC), %o3
4:
sethi %hi(LO_MAGIC), %o4
5:
or %o4, %lo(LO_MAGIC), %o2
8:
ld [%o0], %o5
2:
sub %o5, %o2, %o4
andcc %o4, %o3, %g0
be 8b
add %o0, 4, %o0
/* Check every byte. */
srl %o5, 24, %g5
andcc %g5, 0xff, %g0
be 1f
add %o0, -4, %o4
srl %o5, 16, %g5
andcc %g5, 0xff, %g0
be 1f
add %o4, 1, %o4
srl %o5, 8, %g5
andcc %g5, 0xff, %g0
be 1f
add %o4, 1, %o4
andcc %o5, 0xff, %g0
bne,a 2b
ld [%o0], %o5
add %o4, 1, %o4
1:
retl
sub %o4, %o1, %o0