{name: "SUB", argLength: 2, reg: gp21, asm: "SUB"},                                                 // arg0-arg1
		{name: "SUBCC", argLength: 2, reg: gp21, asm: "SUBCC", typ: "(Int,Flags)"},                         // arg0-arg1 sets CC
		{name: "SUBFCconst", argLength: 1, reg: gp11cxer, asm: "SUBC", aux: "Int64"},                       // auxInt - arg0 (carry is ignored)

				p.From.Offset = 0
			}
		}
	}

	switch p.As {
	// Rewrite SUB constants into ADD.
	case ASUBC:
		if p.From.Type == obj.TYPE_CONST {
			p.From.Offset = -p.From.Offset
			p.As = AADDC
		}

	case ASUBCCC:
		if p.From.Type == obj.TYPE_CONST {
			p.From.Offset = -p.From.Offset
			p.As = AADDCCC
		}

	case ASUB:
		if p.From.Type != obj.TYPE_CONST {
			break
		}

}

// --------------- //
//    bits.Sub*    //
// --------------- //

func Sub(x, y, ci uint) (r, co uint) {
	// amd64:"NEGL","SBBQ","NEGQ"
	// arm64:"NEGS","SBCS","NGC","NEG",-"ADD",-"SUB",-"CMP"
	// loong64:"SUBV","SGTU"
	// ppc64x:"SUBC", "SUBE", "SUBZE", "NEG"
	// s390x:"SUBE"
	// mips64:"SUBV","SGTU"
	// riscv64: "SUB","SLTU"
	return bits.Sub(x, y, ci)
}

func SubC(x, ci uint) (r, co uint) {