]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
[POWERPC] Add hand-coded assembly strcmp
authorSteven Rostedt <rostedt@goodmis.org>
Fri, 29 Feb 2008 16:04:57 +0000 (03:04 +1100)
committerPaul Mackerras <paulus@samba.org>
Mon, 7 Apr 2008 00:03:03 +0000 (10:03 +1000)
We have an assembly version of strncmp for the bootwrapper, but not
for the kernel, so we end up using the C version in the kernel.  This
takes the strncmp code from the bootup and copies it to the kernel
proper, adding two instructions so it copes correctly with len==0.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/kernel/ppc_ksyms.c
arch/powerpc/lib/string.S
include/asm-powerpc/string.h

index a722ede726dbdf558e4a979122129c3a9fd51737..5a4c76eada483adc99331e1a8b38c9ecc2975b73 100644 (file)
@@ -78,6 +78,7 @@ EXPORT_SYMBOL(strncpy);
 EXPORT_SYMBOL(strcat);
 EXPORT_SYMBOL(strlen);
 EXPORT_SYMBOL(strcmp);
+EXPORT_SYMBOL(strncmp);
 
 EXPORT_SYMBOL(csum_partial);
 EXPORT_SYMBOL(csum_partial_copy_generic);
index c4c622d8e6ac253cbda0dffe6098401e7fa3fab5..49eb1f1a2bb4f5a240ff45a0d807bae129718155 100644 (file)
@@ -75,6 +75,20 @@ _GLOBAL(strcmp)
        beq     1b
        blr
 
+_GLOBAL(strncmp)
+       PPC_LCMPI r5,0
+       beqlr
+       mtctr   r5
+       addi    r5,r3,-1
+       addi    r4,r4,-1
+1:     lbzu    r3,1(r5)
+       cmpwi   1,r3,0
+       lbzu    r0,1(r4)
+       subf.   r3,r0,r3
+       beqlr   1
+       bdnzt   eq,1b
+       blr
+
 _GLOBAL(strlen)
        addi    r4,r3,-1
 1:     lbzu    r0,1(r4)
index aa40f92c298d66ef2de5341bc62bf1a9fbe28806..e40010abcaf134f53bbcf639bf6999b856a42a2a 100644 (file)
@@ -7,6 +7,7 @@
 #define __HAVE_ARCH_STRNCPY
 #define __HAVE_ARCH_STRLEN
 #define __HAVE_ARCH_STRCMP
+#define __HAVE_ARCH_STRNCMP
 #define __HAVE_ARCH_STRCAT
 #define __HAVE_ARCH_MEMSET
 #define __HAVE_ARCH_MEMCPY
@@ -18,6 +19,7 @@ extern char * strcpy(char *,const char *);
 extern char * strncpy(char *,const char *, __kernel_size_t);
 extern __kernel_size_t strlen(const char *);
 extern int strcmp(const char *,const char *);
+extern int strncmp(const char *, const char *, __kernel_size_t);
 extern char * strcat(char *, const char *);
 extern void * memset(void *,int,__kernel_size_t);
 extern void * memcpy(void *,const void *,__kernel_size_t);