Subversion Repositories openrisc

        .file   "memchr.S"

        .section .text
        
        .global  _memchr
        .type    _memchr,@function
_memchr:
        cmp     #0, r3          ; If r3 is 0 suntil.b will do nothing and not set any flags...
        stz     #1, r1          ; ...so store 1 into r1.  It will be decremented by the SUB later.
        suntil.b                ; Search until *r1 == r2 or r3 bytes have been examined.
        stnz    #1, r1          ; If no match was found return NULL.
        sub     #1, r1          ; suntil.b leaves r1 pointing at the address *after* the match.
        rts