memset

void * memset1(void *ptr, int c, size_t size)
{
    byte *p = ptr;
    int c32 = c | (c<<8) | (c<<16) | (c<<24);
    byte *cp = (byte *)&c32;
    while(size) {
        if(size >= 4) {
            *((u32*)p) = *((u32*)cp);
            size -= 4; p += 4;
        } else if(size >= 2) {
            *((u16*)p) = *((u16*)cp);
            size -= 2; p += 2;
        } else {
            *p++ = *cp;
            --size;
        }
    }
    return ptr;
}

void * memset1(void *ptr, int c, size_t size)
{
    byte *p = ptr;
    byte c8 = (byte)c;
    u16 c16 = c8  | (c8<<8);
    u32 c32 = c16 | (c16<<16);
    while(size) {
        if(size >= 4) {
            *((u32*)p) = c32;
            size -= 4; p += 4;
        } else if(size >= 2) {
            *((u16*)p) = c16;
            size -= 2; p += 2;
        } else {
            *p++ = c8;
            --size;
        }
    }
    return ptr;
}