{NaN(), NaN()},

	// Issue #7394 overflow checks
	{2, float64(1 << 32)},
	{2, -float64(1 << 32)},
	{-2, float64(1<<32 + 1)},
	{0.5, float64(1 << 45)},
	{0.5, -float64(1 << 45)},
	{Nextafter(1, 2), float64(1 << 63)},
	{Nextafter(1, -2), float64(1 << 63)},
	{Nextafter(-1, 2), float64(1 << 63)},
	{Nextafter(-1, -2), float64(1 << 63)},

	// Issue #57465
	{Copysign(0, -1), 1e19},

		t.Errorf("Expected %#+v, got #%+v", e, a)
	}
	if e, a := []float64{42, 0}, fairAlloc([]float64{47, 0}, 42); !reflect.DeepEqual(e, a) {
		t.Errorf("Expected %#+v, got #%+v", e, a)
	}
	if e, a := []float64{1, 41}, fairAlloc([]float64{1, 47}, 42); !reflect.DeepEqual(e, a) {
		t.Errorf("Expected %#+v, got #%+v", e, a)
	}
	if e, a := []float64{3, 5, 5, 1}, fairAlloc([]float64{3, 7, 9, 1}, 14); !reflect.DeepEqual(e, a) {

func alike(x, y *Float) bool {
	return x.Cmp(y) == 0 && x.Signbit() == y.Signbit()
}

func alike32(x, y float32) bool {
	// we can ignore NaNs
	return x == y && math.Signbit(float64(x)) == math.Signbit(float64(y))
}

func alike64(x, y float64) bool {
	// we can ignore NaNs
	return x == y && math.Signbit(x) == math.Signbit(y)
}

func TestFloatMantExp(t *testing.T) {
	for _, test := range []struct {
		x    string

}

// ifaceNumAsFloat64/ifaceNumAsNumber are used to test unmarshaling with and
// without UseNumber
var ifaceNumAsFloat64 = map[string]any{
	"k1": float64(1),
	"k2": "s",
	"k3": []any{float64(1), float64(2.0), float64(3e-3)},
	"k4": map[string]any{"kk1": "s", "kk2": float64(2)},
}

var ifaceNumAsNumber = map[string]any{
	"k1": Number("1"),
	"k2": "s",
	"k3": []any{Number("1"), Number("2.0"), Number("3e-3")},

	// skew between the two values. This is generally OK as the
	// values shift relatively slowly over the course of a GC
	// cycle.
	assistWorkPerByte := float64(scanWorkRemaining) / float64(heapRemaining)
	assistBytesPerWork := float64(heapRemaining) / float64(scanWorkRemaining)
	c.assistWorkPerByte.Store(assistWorkPerByte)
	c.assistBytesPerWork.Store(assistBytesPerWork)
}

		{name: "FCVTZUS", argLength: 1, reg: fpgp, asm: "FCVTZUS"},   // float32 -> uint64
		{name: "FCVTZUD", argLength: 1, reg: fpgp, asm: "FCVTZUD"},   // float64 -> uint64
		{name: "FCVTSD", argLength: 1, reg: fp11, asm: "FCVTSD"},     // float32 -> float64
		{name: "FCVTDS", argLength: 1, reg: fp11, asm: "FCVTDS"},     // float64 -> float32

		// floating-point round to integral

	// new memory has been freed into it.
	sc.setNonEmpty()
}

type piController struct {
	kp float64 // Proportional constant.
	ti float64 // Integral time constant.
	tt float64 // Reset time.

	min, max float64 // Output boundaries.

	// PI controller state.

	errIntegral float64 // Integral of the error from t=0 to now.

	// Error flags.

		{name: "LDGR", argLength: 1, reg: gpfp, asm: "LDGR"}, // move int64 to float64 (no conversion)
		{name: "LGDR", argLength: 1, reg: fpgp, asm: "LGDR"}, // move float64 to int64 (no conversion)

		{name: "CFDBRA", argLength: 1, reg: fpgp, asm: "CFDBRA", clobberFlags: true}, // convert float64 to int32
		{name: "CGDBRA", argLength: 1, reg: fpgp, asm: "CGDBRA", clobberFlags: true}, // convert float64 to int64

		{`package e1; const _ = float32(-1e-200)`, `float32(-1e-200)`, `float32`, `0`},
		{`package e2; const _ = float64( 1e-2000)`, `float64(1e-2000)`, `float64`, `0`},
		{`package e3; const _ = float64(-1e-2000)`, `float64(-1e-2000)`, `float64`, `0`},
		{`package e4; const _ = complex64( 1e-200)`, `complex64(1e-200)`, `complex64`, `(0 + 0i)`},

		{`package e1; const _ = float32(-1e-200)`, `float32(-1e-200)`, `float32`, `0`},
		{`package e2; const _ = float64( 1e-2000)`, `float64(1e-2000)`, `float64`, `0`},
		{`package e3; const _ = float64(-1e-2000)`, `float64(-1e-2000)`, `float64`, `0`},
		{`package e4; const _ = complex64( 1e-200)`, `complex64(1e-200)`, `complex64`, `(0 + 0i)`},