ref: 7a39b526a28d598345a38327f3bcb613004c7937
dir: /src/libc/arch/amd64/strchr.s/
.file "strchr.s" .text .globl strchr,_strchr _strchr: strchr: movq %rdi,%r8 movb $0,%al movq $-1,%rcx cld repne scasb leaq -1(%rdi),%rcx subq %r8,%rcx cmp %rdi,%rsi /* set ZF to 0 */ movq %r8,%rdi movb %sil,%al repne scasb je found none: xor %rax,%rax ret found: leaq -1(%rdi),%rax ret