diff options
Diffstat (limited to 'S/str_diff.S')
| -rw-r--r-- | S/str_diff.S | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/S/str_diff.S b/S/str_diff.S new file mode 100644 index 0000000..a90724e --- /dev/null +++ b/S/str_diff.S @@ -0,0 +1,22 @@ +.globl str_diff +.type str_diff, @function +str_diff: + pushl %edi + pushl %esi + movl 12(%esp), %esi + movl 16(%esp), %edi +.L1: + lodsb + scasb + jne .L2 + testb %al,%al + jne .L1 + xorl %eax,%eax + jmp .L3 +.L2: + sbbl %eax,%eax + orb $1,%al +.L3: + popl %esi + popl %edi + ret |