{name: "SLLconst", argLength: 1, reg: gp11, asm: "SLL", aux: "Int32"}, // arg0 << auxInt, 0 <= auxInt < 32
		{name: "SRL", argLength: 2, reg: gp21, asm: "SRL"},                    // arg0 >> arg1, unsigned, shift amount is mod 256
		{name: "SRLconst", argLength: 1, reg: gp11, asm: "SRL", aux: "Int32"}, // arg0 >> auxInt, unsigned, 0 <= auxInt < 32

	plt.AddUint32(ctxt.Arch, 0x030ec023)               // subu  $24, $24, $14
	plt.AddUint32(ctxt.Arch, 0x03e07825)               // move  $15, $31
	plt.AddUint32(ctxt.Arch, 0x0018c0c2)               // srl   $24, $24, 3
	plt.AddUint32(ctxt.Arch, 0x0320f809)               // jalr  $25
	plt.AddUint32(ctxt.Arch, 0x2718fffe)               // subu  $24, $24, 2

	if gotplt.Size() != 0 {

		{name: "SRAW", argLength: 2, reg: gp21, asm: "SRAW"},                 // arg0 >> (aux1 & 31), arithmetic right shift of 32 bit value, sign extended to 64 bits
		{name: "SRL", argLength: 2, reg: gp21, asm: "SRL"},                   // arg0 >> (aux1 & 63), logical right shift
		{name: "SRLW", argLength: 2, reg: gp21, asm: "SRLW"},                 // arg0 >> (aux1 & 31), logical right shift of 32 bit value, sign extended to 64 bits

	one64 int64  = 1
	one32 int32  = 1
	v64   int64  = 11 // ensure it's not 2**n +/- 1
	v64_n int64  = -11
	v32   int32  = 11
	v32_n int32  = -11
	uv32  uint32 = 19
	uz    uint8  = 1 // for lowering to SLL/SRL/SRA
)

var crTests = []struct {
	name string
	tf   func(t *testing.T)
}{
	{"AddConst64", testAddConst64},
	{"AddConst32", testAddConst32},
	{"AddVar64", testAddVar64},
	{"AddVar64Cset", testAddVar64Cset},

	// s390x:"MOVWBR"
	// arm64:"REVW"
	// ppc64x/power10: "BRW"
	return bits.ReverseBytes32(n)
}

func ReverseBytes16(n uint16) uint16 {
	// amd64:"ROLW"
	// arm64:"REV16W",-"UBFX",-"ORR"
	// arm/5:"SLL","SRL","ORR"
	// arm/6:"REV16"
	// arm/7:"REV16"
	// ppc64x/power10: "BRH"
	return bits.ReverseBytes16(n)
}

// --------------------- //
//    bits.RotateLeft    //
// --------------------- //

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