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authorUlrich Drepper <drepper@redhat.com>2005-11-17 21:19:33 +0000
committerUlrich Drepper <drepper@redhat.com>2005-11-17 21:19:33 +0000
commit8ce9ea74cc2a6ce6fdafac0e0829b1bc93788143 (patch)
tree0ff362f555105a0d52a00c358bf192d20d6e9141 /sysdeps/powerpc/powerpc32
parent52d979bb0d55911b4f60ae87588bede557082aaa (diff)
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[BZ #1877]
2005-11-17  Steven Munroe  <sjmunroe@us.ibm.com>
	[BZ #1877]
	* string/test-strncmp.c (do_test_limit): New function.
	(do_test) Add cast to eliminate compiler warnings.
	(do_random_tests) Add cast to eliminate compiler warnings.
	(test_main) Add do_test_limit tests.
	* sysdeps/powerpc/powerpc32/strncmp.S: Test length before unaligned
	load.
	* sysdeps/powerpc/powerpc64/strncmp.S: Likewise.
Diffstat (limited to 'sysdeps/powerpc/powerpc32')
-rw-r--r--sysdeps/powerpc/powerpc32/strncmp.S17
1 files changed, 11 insertions, 6 deletions
diff --git a/sysdeps/powerpc/powerpc32/strncmp.S b/sysdeps/powerpc/powerpc32/strncmp.S
index 3b33bb921f..3e0fff5ac2 100644
--- a/sysdeps/powerpc/powerpc32/strncmp.S
+++ b/sysdeps/powerpc/powerpc32/strncmp.S
@@ -47,6 +47,7 @@ EALIGN (BP_SYM(strncmp), 4, 0)
 	lis	r7F7F, 0x7f7f
 	dcbt	0,rSTR2
 	clrlwi.	rTMP, rTMP, 30
+	cmplwi	cr1, rN, 0
 	lis	rFEFE, -0x101
 	bne	L(unaligned)
 /* We are word alligned so set up for two loops.  first a word
@@ -54,7 +55,8 @@ EALIGN (BP_SYM(strncmp), 4, 0)
 	srwi.	rTMP, rN, 2
 	clrlwi	rN, rN, 30
 	addi	rFEFE, rFEFE, -0x101
-	addi	r7F7F, r7F7F, 0x7f7f	
+	addi	r7F7F, r7F7F, 0x7f7f
+	cmplwi	cr1, rN, 0	
 	beq	L(unaligned)
 
 	mtctr	rTMP	/* Power4 wants mtctr 1st in dispatch group.  */
@@ -122,16 +124,19 @@ L(tail):
 	addi	rSTR1, rSTR1, 4
 	bne-	cr1, L(different)
 	addi	rSTR2, rSTR2, 4
+	cmplwi	cr1, rN, 0
 L(unaligned):
 	mtctr   rN	/* Power4 wants mtctr 1st in dispatch group */
-	cmpwi	rN,0
-	lbz	rWORD1, 0(rSTR1)
-	lbz	rWORD2, 0(rSTR2)
-	bgt	L(u1)
+	bgt	cr1, L(uz)
 L(ux):
 	li	rRTN, 0
 	blr
-
+	.align 4
+L(uz):
+	lbz	rWORD1, 0(rSTR1)
+	lbz	rWORD2, 0(rSTR2)
+	nop
+	b	L(u1)
 L(u0):
 	lbzu	rWORD2, 1(rSTR2)
 L(u1):