// amd64:"SBBQ",-"NEGL",-"NEGQ"
	// arm64:"SBCS",-"NEGS",-"NGC",-"NEG",-"ADD",-"SUB",-"CMP"
	// s390x:"SUBE"
	r[1], c = bits.Sub64(p[1], q[1], c)
	r[2], c = bits.Sub64(p[2], q[2], c)
}

func Sub64MSaveC(p, q, r, c *[2]uint64) {
	// ppc64x:"SUBC\tR\\d+, R\\d+,", "SUBZE", "NEG"
	r[0], c[0] = bits.Sub64(p[0], q[0], 0)
	// ppc64x:"SUBC\tR\\d+, [$]0,", "SUBE", "SUBZE", "NEG"
	r[1], c[1] = bits.Sub64(p[1], q[1], c[0])
}