- Eliminate extra subcs instruction. I have not noticed before that we

always perform substraction now, so no instruction could be rordered to eliminate the conditional substraction.
2009-06-21 13:15:56 +00:00 · 2009-06-21 13:15:56 +00:00 · c61860f8a6
commit c61860f8a6
parent b24516038c
1 changed files with 1 additions and 2 deletions
--- a/lib/libc/arm/string/strncmp.S
+++ b/lib/libc/arm/string/strncmp.S
@ -40,10 +40,9 @@ ENTRY(strncmp)

 /* ip == last src address to compare */
 	adds	ip, r0, r2
-	sub	ip, ip, #1
 /* Use last possible address on overflow. */
 	movcs	ip, #0
-	subcs	ip, ip, #1
+	sub	ip, ip, #1
 1:
 	ldrb	r2, [r0], #1
 	ldrb	r3, [r1], #1