// using shifted ops this can be done in 4 instructions.
(Bswap32 <t> x) && buildcfg.GOARM.Version==5 =>
	(XOR <t>
		(SRLconst <t> (BICconst <t> (XOR <t> x (SRRconst <t> [16] x)) [0xff0000]) [8])
		(SRRconst <t> x [8]))

// byte swap for ARMv6 and above
(Bswap32 x) && buildcfg.GOARM.Version>=6 => (REV x)

// boolean ops -- booleans are represented with 0=false, 1=true
(AndB ...) => (AND ...)

		{name: "SRAconst", argLength: 1, reg: gp11, asm: "SRA", aux: "Int32"}, // arg0 >> auxInt, signed, 0 <= auxInt < 32
		{name: "SRR", argLength: 2, reg: gp21},                                // arg0 right rotate by arg1 bits
		{name: "SRRconst", argLength: 1, reg: gp11, aux: "Int32"},             // arg0 right rotate by auxInt bits, 0 <= auxInt < 32

		// auxInt for all of these satisfy 0 <= auxInt < 32

	v_0 := v.Args[0]
	b := v.Block
	// match: (Bswap32 <t> x)
	// cond: buildcfg.GOARM.Version==5
	// result: (XOR <t> (SRLconst <t> (BICconst <t> (XOR <t> x (SRRconst <t> [16] x)) [0xff0000]) [8]) (SRRconst <t> x [8]))
	for {
		t := v.Type
		x := v_0
		if !(buildcfg.GOARM.Version == 5) {
			break
		}
		v.reset(OpARMXOR)
		v.Type = t

				{1, 22527}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
			},
			outputs: []outputInfo{
				{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
			},
		},
	},
	{
		name:    "SRRconst",
		auxType: auxInt32,
		argLen:  1,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 22527}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
			},
			outputs: []outputInfo{