{name: "FMOVDfpgp", argLength: 1, reg: fpgp, asm: "FMOVD"}, // move float64 to int64 (no conversion)
		{name: "FMOVSgpfp", argLength: 1, reg: gpfp, asm: "FMOVS"}, // move 32bits from int to float reg (no conversion)
		{name: "FMOVSfpgp", argLength: 1, reg: fpgp, asm: "FMOVS"}, // move 32bits from float to int reg, zero extend (no conversion)

		// conversions

			p.AddRestSourceConst(me)
		}
		p.Reg = v.Args[0].Reg()
		p.To = obj.Addr{Type: obj.TYPE_REG, Reg: v.ResultReg()}

	case ssa.OpPPC64RLWNM:
		_, mb, me, _ := ssa.DecodePPC64RotateMask(v.AuxInt)
		p := s.Prog(v.Op.Asm())
		p.To = obj.Addr{Type: obj.TYPE_REG, Reg: v.Reg()}
		p.Reg = v.Args[0].Reg()
		p.From = obj.Addr{Type: obj.TYPE_REG, Reg: v.Args[1].Reg()}

	case obj.TYPE_REG:
		if REG_R0 <= a.Reg && a.Reg <= REG_R31 {
			return C_REG
		}
		if REG_F0 <= a.Reg && a.Reg <= REG_F31 {
			return C_FREG
		}
		if REG_M0 <= a.Reg && a.Reg <= REG_M31 {
			return C_MREG
		}
		if REG_FCR0 <= a.Reg && a.Reg <= REG_FCR31 {
			return C_FCREG
		}
		if REG_W0 <= a.Reg && a.Reg <= REG_W31 {
			return C_WREG
		}
		if a.Reg == REG_LO {
			return C_LO
		}

	switch a.Type {
	case obj.TYPE_NONE:
		return C_NONE

	case obj.TYPE_REG:
		if REG_R0 <= a.Reg && a.Reg <= REG_R31 {
			return C_REG
		}
		if REG_F0 <= a.Reg && a.Reg <= REG_F31 {
			return C_FREG
		}
		if REG_FCSR0 <= a.Reg && a.Reg <= REG_FCSR31 {
			return C_FCSRREG
		}
		if REG_FCC0 <= a.Reg && a.Reg <= REG_FCC31 {
			return C_FCCREG
		}
		return C_GOK

	case obj.TYPE_MEM:

		case ABGTU:
			ins.as, ins.rs1, ins.rs2 = ABLTU, uint32(p.From.Reg), uint32(p.Reg)
		case ABGTZ:
			ins.as, ins.rs1, ins.rs2 = ABLT, uint32(p.From.Reg), REG_ZERO
		case ABLE:
			ins.as, ins.rs1, ins.rs2 = ABGE, uint32(p.From.Reg), uint32(p.Reg)
		case ABLEU:
			ins.as, ins.rs1, ins.rs2 = ABGEU, uint32(p.From.Reg), uint32(p.Reg)
		case ABLEZ:

	// them.
	clobbers := uint64(opcodeTable[v.Op].reg.clobbers)
	for {
		if clobbers == 0 {
			break
		}
		reg := uint8(bits.TrailingZeros64(clobbers))
		clobbers &^= 1 << reg

		for _, slot := range locs.registers[reg] {
			if state.loggingLevel > 1 {
				state.logf("at %v: %v clobbered out of %v\n", v, state.slots[slot], &state.registers[reg])
			}

			last := locs.slots[slot]

(MOVHZreg y:(MOVHBRload _ _)) => y

(MOVHreg y:(MOV(H|B)reg _)) => y // repeat

(MOV(H|HZ)reg y:(MOV(HZ|H)reg x)) => (MOV(H|HZ)reg x)

// W - there are more combinations than these

(MOV(WZ|WZ|WZ|W|W|W)reg y:(MOV(WZ|HZ|BZ|W|H|B)reg _)) => y // repeat
(MOVWZreg y:(MOV(H|W)BRload _ _)) => y

(MOV(W|WZ)reg y:(MOV(WZ|W)reg x)) => (MOV(W|WZ)reg x)

					return errENOENT
		*/
	}
	if ZosTraceLevel > 0 {
		var name string
		if reg == nil {
			reg = regexp.MustCompile("(^unix\\.[^/]+$|.*\\/unix\\.[^/]+$)")
		}
		i := 1
		pc, file, line, ok := runtime.Caller(i)
		if ok {
			name = runtime.FuncForPC(pc).Name()
		}
		for ok && reg.MatchString(runtime.FuncForPC(pc).Name()) {
			i += 1
			pc, file, line, ok = runtime.Caller(i)
		}

#define RETPOLINE(reg) \
	/*   CALL setup */     BYTE $0xE8; BYTE $(2+2); BYTE $0; BYTE $0; BYTE $0;	\
	/* nospec: */									\
	/*   PAUSE */           BYTE $0xF3; BYTE $0x90;					\
	/*   JMP nospec */      BYTE $0xEB; BYTE $-(2+2);				\
	/* setup: */									\
	/*   MOVQ AX, 0(SP) */  BYTE $0x48|((reg&8)>>1); BYTE $0x89;			\
	                        BYTE $0x04|((reg&7)<<3); BYTE $0x24;			\

	t.Parallel()

	f, err := CreateTemp(t.TempDir(), "_Go_ReaddirOfFile")
	if err != nil {
		t.Fatal(err)
	}
	f.Write([]byte("foo"))
	f.Close()
	reg, err := Open(f.Name())
	if err != nil {
		t.Fatal(err)
	}
	defer reg.Close()

	names, err := reg.Readdirnames(-1)
	if err == nil {
		t.Error("Readdirnames succeeded; want non-nil error")
	}
	var pe *PathError