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       memchr.s - scc - simple c99 compiler
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       memchr.s (220B)
       ---
            1         .file         "memchr.s"
            2 
            3         .text
            4         .globl        memchr,_memchr
            5 _memchr:
            6 memchr:
            7         cmpq        $0,%rdx
            8         je        notfound
            9 
           10         movq        %rdx,%rcx
           11         movb        %sil,%al
           12         cld
           13         repne
           14         scasb
           15         je         found
           16 
           17 notfound:
           18         xor        %eax,%eax
           19         ret
           20 
           21 found:
           22         leaq        -1(%rdi),%rax
           23         ret