// Restore frame pointer.
					// ADD $framesize-8, RSP, R29
					p.As = AADD
					p.From.Type = obj.TYPE_CONST
					p.From.Offset = int64(c.autosize) - 8
					p.Reg = REGSP
					p.To.Type = obj.TYPE_REG
					p.To.Reg = REGFP

					// Pop stack frame.
					// ADD $framesize, RSP, RSP
					p = obj.Appendp(p, c.newprog)
					p.As = AADD
					p.From.Type = obj.TYPE_CONST

		fallthrough

	case FCMP, FCMPE:
		if _, ok := inst.Args[1].(Imm); ok {
			args[1] = "$(0.0)"
		}
		fallthrough

	case FADD, FSUB, FMUL, FNMUL, FDIV, FMAX, FMIN, FMAXNM, FMINNM, FCSEL, FMADD, FMSUB, FNMADD, FNMSUB:
		if strings.HasSuffix(op, "MADD") || strings.HasSuffix(op, "MSUB") {
			args[2], args[3] = args[3], args[2]
		}
		if r, ok := inst.Args[0].(Reg); ok {
			rno := uint16(r)

(MADD a (MOVDconst [-1]) x) => (SUB a x)
(MADD a (MOVDconst [0]) _) => a
(MADD a (MOVDconst [1]) x) => (ADD a x)
(MADD a (MOVDconst [c]) x) && isPowerOfTwo64(c) => (ADDshiftLL a x [log64(c)])
(MADD a (MOVDconst [c]) x) && isPowerOfTwo64(c-1) && c>=3 => (ADD a (ADDshiftLL <x.Type> x x [log64(c-1)]))
(MADD a (MOVDconst [c]) x) && isPowerOfTwo64(c+1) && c>=7 => (SUB a (SUBshiftLL <x.Type> x x [log64(c+1)]))

			}
			if rela != 0 {
				rAdd = int64(add)
			} else {
				// load addend from image
				if rSize == 4 {
					rAdd = int64(e.Uint32(sect.base[rOff:]))
				} else if rSize == 8 {
					rAdd = int64(e.Uint64(sect.base[rOff:]))
				} else {
					return errorf("invalid rela size %d", rSize)
				}
			}

			if addendSize == 2 {
				rAdd = int64(int16(rAdd))
			}
			if addendSize == 4 {

	BYTE	$0x00
	BYTE	$0x19
	BGE	L16
	BVS	L16
	WFCEDBS	V2, V2, V2
	BVS	LEXITTAGexp
	MOVD	$·expxaddexp<>+0(SB), R1
	FMOVD	72(R5), F6
	FMOVD	0(R1), F2
	WFMSDB	V0, V6, V2, V6
	FMOVD	64(R5), F4
	FADD	F6, F2
	FMOVD	56(R5), F1
	FMADD	F4, F2, F0
	FMOVD	48(R5), F3
	WFMADB	V2, V1, V0, V2
	FMOVD	40(R5), F1
	FMOVD	32(R5), F4
	FMUL	F0, F0
	WFMADB	V2, V4, V1, V4
	LGDR	F6, R1
	FMOVD	24(R5), F1

Optionally-shifted immediate.

Examples:

	ADD $(3151<<12), R14, R20     <=>    add x20, x14, #0xc4f, lsl #12
	ADDW $1864, R25, R6           <=>    add w6, w25, #0x748

Optionally-shifted registers are written as <Rm>{<shift><amount>}.
The <shift> can be <<(lsl), >>(lsr), ->(asr), @>(ror).

Examples:

	ADD R19>>30, R10, R24     <=>    add x24, x10, x19, lsr #30

				p.From.Offset = 0
			}
		}
	}

	// Rewrite SUB constants into ADD.
	switch p.As {
	case ASUBC:
		if p.From.Type == obj.TYPE_CONST && isint32(-p.From.Offset) {
			p.From.Offset = -p.From.Offset
			p.As = AADDC
		}

	case ASUB:
		if p.From.Type == obj.TYPE_CONST && isint32(-p.From.Offset) {
			p.From.Offset = -p.From.Offset
			p.As = AADD
		}
	}

	if c.ctxt.Flag_dynlink {
		c.rewriteToUseGot(p)

Douglas Reid <******@****.***> 1623196889 -0700

	{AMULV, C_REG, C_NONE, C_NONE, C_REG, C_NONE, 2, 4, 0, 0},
	{AMULV, C_REG, C_REG, C_NONE, C_REG, C_NONE, 2, 4, 0, 0},

	{AADD, C_ADD0CON, C_REG, C_NONE, C_REG, C_NONE, 4, 4, 0, 0},
	{AADD, C_ADD0CON, C_NONE, C_NONE, C_REG, C_NONE, 4, 4, 0, 0},
	{AADD, C_ANDCON, C_REG, C_NONE, C_REG, C_NONE, 10, 8, 0, 0},
	{AADD, C_ANDCON, C_NONE, C_NONE, C_REG, C_NONE, 10, 8, 0, 0},

	{AADDV, C_ADD0CON, C_REG, C_NONE, C_REG, C_NONE, 4, 4, 0, 0},

func (t *FuncType) Out(i int) *Type {
	return (t.OutSlice()[i])
}

func (t *FuncType) InSlice() []*Type {
	uadd := unsafe.Sizeof(*t)
	if t.TFlag&TFlagUncommon != 0 {
		uadd += unsafe.Sizeof(UncommonType{})
	}
	if t.InCount == 0 {
		return nil
	}
	return (*[1 << 16]*Type)(addChecked(unsafe.Pointer(t), uadd, "t.inCount > 0"))[:t.InCount:t.InCount]
}
func (t *FuncType) OutSlice() []*Type {
	outCount := uint16(t.NumOut())