source: buchla-68k/libsm/memcmp.c

/*
   =============================================================================
        memcmp.c -- compare memory areas
        Version 2 -- 1987-06-15

        Compare n bytes:  vp1>vp2: >0  vp1==vp2: 0  vp1<vp2: <0
   =============================================================================
*/

#include "ram.h"

int16_t memcmp(void *vp1, void *vp2, int16_t n)
{
        int8_t *cp1 = vp1;
        int8_t *cp2 = vp2;
        register int16_t        diff;

        if (cp1 != cp2)
                while (--n >= 0)
                        if ((diff = *cp1++ - *cp2++))
                                return(diff);

        return(0);
}