system/glibc
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Fix algorithm to align source pointer correctly.

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This commit is contained in:
Andreas Jaeger 2002-11-12 17:57:51 +00:00
parent 7ceef50ec9
commit 7288b24f0c
1 changed files with 3 additions and 1 deletions
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4
sysdeps/x86_64/strcat.S
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@ -141,11 +141,13 @@ ENTRY (BP_SYM (strcat))
2: 2:
/* Second step: Copy source to destination. */ /* Second step: Copy source to destination. */
movq %rax, %rcx /* duplicate */ movq %rsi, %rcx /* duplicate */
andl $7,%ecx /* mask alignment bits */ andl $7,%ecx /* mask alignment bits */
movq %rax, %rdx /* move around */ movq %rax, %rdx /* move around */
jz 22f /* aligned => start loop */ jz 22f /* aligned => start loop */
neg %ecx /* align to 8 bytes. */
addl $8, %ecx
/* Align the source pointer. */ /* Align the source pointer. */
21: 21:
movb (%rsi), %al /* Fetch a byte */ movb (%rsi), %al /* Fetch a byte */