case f > g:
		return +1, false
	case f == g:
		return 0, false
	}
	return 0, true // must be NaN
}

func testcmp(t *testing.T, f, g float64) {
	hcmp, hisnan := hwcmp(f, g)
	scmp, sisnan := Fcmp64(math.Float64bits(f), math.Float64bits(g))
	if int32(hcmp) != scmp || hisnan != sisnan {
		err(t, "cmp(%g, %g) = sw %v, %v, hw %v, %v\n", f, g, scmp, sisnan, hcmp, hisnan)
	}
}

func same(f, g float64) bool {

		{fcmplt, 1.0, 1.0, 123, 123},
		{fcmple, 1.0, 1.0, 123, 0},
		{fcmpgt, 1.0, 1.0, 123, 123},
		{fcmpge, 1.0, 1.0, 123, 0},
		{fcmpeq, 1.0, 1.0, 123, 0},
		{fcmpne, 1.0, 1.0, 123, 123},

		{fcmplt, 1.0, 2.0, 123, 0},
		{fcmple, 1.0, 2.0, 123, 0},
		{fcmpgt, 1.0, 2.0, 123, 123},
		{fcmpge, 1.0, 2.0, 123, 123},
		{fcmpeq, 1.0, 2.0, 123, 123},
		{fcmpne, 1.0, 2.0, 123, 0},

		{fcmplt, 2.0, 1.0, 123, 123},

	"EONW",
	"EOR",
	"EORW",
	"ERET",
	"EXTR",
	"EXTRW",
	"FABSD",
	"FABSS",
	"FADDD",
	"FADDS",
	"FCCMPD",
	"FCCMPED",
	"FCCMPES",
	"FCCMPS",
	"FCMPD",
	"FCMPED",
	"FCMPES",
	"FCMPS",
	"FCSELD",
	"FCSELS",
	"FCVTDH",
	"FCVTDS",
	"FCVTHD",
	"FCVTHS",
	"FCVTSD",
	"FCVTSH",
	"FCVTZSD",
	"FCVTZSDW",
	"FCVTZSS",
	"FCVTZSSW",
	"FCVTZUD",

	"MODUD",
	"MODUW",
	"MODSD",
	"MODSW",
	"EQV",
	"EQVCC",
	"EXTSB",
	"EXTSBCC",
	"EXTSH",
	"EXTSHCC",
	"FABS",
	"FABSCC",
	"FADD",
	"FADDCC",
	"FADDS",
	"FADDSCC",
	"FCMPO",
	"FCMPU",
	"FCTIW",
	"FCTIWCC",
	"FCTIWZ",
	"FCTIWZCC",
	"FDIV",
	"FDIVCC",
	"FDIVS",
	"FDIVSCC",
	"FMADD",
	"FMADDCC",
	"FMADDS",
	"FMADDSCC",
	"FMOVD",
	"FMOVDCC",
	"FMOVDU",

	// arm64:"FMSUBD"
	// riscv64:"FNMSUBD\t"
	return z - x*y
}

func Cmp(f float64) bool {
	// arm64:"FCMPD","(BGT|BLE|BMI|BPL)",-"CSET\tGT",-"CBZ"
	return f > 4 || f < -4
}

func CmpZero64(f float64) bool {
	// s390x:"LTDBR",-"FCMPU"
	return f <= 0
}

func CmpZero32(f float32) bool {
	// s390x:"LTEBR",-"CEBR"
	return f <= 0
}

	"RXSBG",
	"ROSBG",
	"RNSBGT",
	"RXSBGT",
	"ROSBGT",
	"RISBG",
	"RISBGN",
	"RISBGZ",
	"RISBGNZ",
	"RISBHG",
	"RISBLG",
	"RISBHGZ",
	"RISBLGZ",
	"FABS",
	"FADD",
	"FADDS",
	"FCMPO",
	"FCMPU",
	"CEBR",
	"FDIV",
	"FDIVS",
	"FMADD",
	"FMADDS",
	"FMOVD",
	"FMOVS",
	"FMSUB",
	"FMSUBS",
	"FMUL",
	"FMULS",
	"FNABS",
	"FNEG",
	"FNEGS",
	"LEDBR",
	"LDEBR",
	"LPDFR",

Robert Griesemer <******@****.***> 1606801129 -0800

TEXT ·archExp(SB),$0-16
	FMOVD	x+0(FP), F0	// F0 = x
	FCMPD	F0, F0
	BNE	isNaN		// x = NaN, return NaN
	FMOVD	$Overflow, F1
	FCMPD	F1, F0
	BGT	overflow	// x > Overflow, return PosInf
	FMOVD	$Underflow, F1
	FCMPD	F1, F0
	BLT	underflow	// x < Underflow, return 0
	MOVD	$NearZero, R0
	FMOVD	R0, F2
	FABSD	F0, F3
	FMOVD	$1.0, F1	// F1 = 1.0
	FCMPD	F2, F3
	BLT	nearzero	// fabs(x) < NearZero, return 1 + x

	CMPUBLT R4, R2, isMaxNaN
	MOVD    R9, R3
	AND     R5, R3 // y = |y|
	CMPUBLT R4, R3, isMaxNaN
	// ±0 special cases
	OR      R3, R2
	BEQ     isMaxZero

	FMOVD   x+0(FP), F1
	FMOVD   y+8(FP), F2
	FCMPU   F2, F1
	BGT     +3(PC)
	FMOVD   F1, ret+16(FP)
	RET
	FMOVD   F2, ret+16(FP)
	RET
isMaxNaN: // return NaN
	MOVD	$NaN, R4
isPosInf: // return +Inf
	MOVD    R4, ret+16(FP)
	RET
isMaxZero:

func cmpT2(p, q *T2) {
	if *p != *q {
		panic("comparison test wrong")
	}
}

//go:noinline
func cmpA2(p, q *A2) {
	if *p != *q {
		panic("comparison test wrong")
	}
}

//go:noinline
func cmpA4(p, q *A4) {
	if *p != *q {
		panic("comparison test wrong")
	}
}

//go:noinline
func cmpA8(p, q *A8) {
	if *p != *q {
		panic("comparison test wrong")
	}
}

func TestAlignEqual(t *testing.T) {