/ strchr.s (emx+gcc) -- Copyright (c) 1990-1993 by Eberhard Mattes

        .globl _strchr

/ char *strchr (const char *string, int c)
/ {
/   do
/     {
/       if (*string == (char)c)
/         return ((char *)string);
/     } while (*string++ != 0);
/   return (NULL);
/ }

        .text

        .align  2, 0x90

_strchr:
        pushl   %esi
        movl    2*4(%esp), %esi         / string
        movb    3*4(%esp), %ah          / c
        .align  2, 0x90
1:      lodsb
        cmpb    %ah, %al
        jz      2f
        orb     %al, %al
        jnz     1b
        xorl    %eax, %eax
        popl    %esi
        ret

        .align  2, 0x90
2:      lea     -1(%esi), %eax
        popl    %esi
        ret