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Commit 7f2ff23d authored by Jesper Nilsson's avatar Jesper Nilsson
Browse files

CRISv32: Add arch optimized strcmp. 



Add an optimized strcmp for CRISv32. This improves strcmp performance
with about 25% when comparing a 55 character string with itself.

Signed-off-by: default avatarEdgar Iglesias <edgar@axis.com>
Acked-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
parent b0903ee8

arch/cris/arch-v32/lib/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -3,5 +3,5 @@ 
#



lib-y  = checksum.o checksumcopy.o string.o usercopy.o memset.o \

	csumcpfruser.o spinlock.o delay.o

	csumcpfruser.o spinlock.o delay.o strcmp.o

arch/cris/arch-v32/lib/strcmp.S

0 → 100644
+21 −0
Original line number Diff line number Diff line 
; strcmp.S -- CRISv32 version.

; Copyright (C) 2008 AXIS Communications AB

; Written by Edgar E. Iglesias

;

; This source code is licensed under the GNU General Public License,

; Version 2.  See the file COPYING for more details.



	.global	strcmp

	.type	strcmp,@function

strcmp:

1:

	move.b	[$r10+], $r12

	seq	$r13

	sub.b	[$r11+], $r12

	or.b	$r12, $r13

	beq	1b

	nop



	ret

	movs.b	$r12, $r10

	.size	strcmp, . - strcmp

arch/cris/include/asm/string.h

+6 −0
Original line number Diff line number Diff line
@@ -11,4 +11,10 @@ extern void *memcpy(void *, const void *, size_t); 
#define __HAVE_ARCH_MEMSET

extern void *memset(void *, int, size_t);



#ifdef CONFIG_ETRAX_ARCH_V32

/* For v32 we provide strcmp.  */

#define __HAVE_ARCH_STRCMP

extern int strcmp(const char *s1, const char *s2);

#endif



#endif