// riscv64:"FSGNJD"
	// arm64:"ORR", -"AND"
	sink64[1] = math.Copysign(c, -1)

	// Like math.Copysign(c, -1), but with integer operations. Useful
	// for platforms that have a copysign opcode to see if it's detected.
	// s390x:"LNDFR\t",-"MOVD\t"     (no integer load/store)
	sink64[2] = math.Float64frombits(math.Float64bits(a) | 1<<63)

	// amd64:"ANDQ","ORQ"
	// s390x:"CPSDR\t",-"MOVD\t"     (no integer load/store)

// license that can be found in the LICENSE file.

package runtime_test

import (
	"math"
	"strings"
	"testing"
	"unsafe"
)

var (
	zero    = math.Copysign(0, +1)
	negZero = math.Copysign(0, -1)
	inf     = math.Inf(+1)
	negInf  = math.Inf(-1)
	nan     = math.NaN()
)

var tests = []struct{ min, max float64 }{
	{1, 2},
	{-2, 1},
	{negZero, zero},
	{zero, inf},

   * @since 13.0
   */
  public static boolean fuzzyEquals(double a, double b, double tolerance) {
    MathPreconditions.checkNonNegative("tolerance", tolerance);
    return Math.copySign(a - b, 1.0) <= tolerance
        // copySign(x, 1.0) is a branch-free version of abs(x), but with different NaN semantics
        || (a == b) // needed to ensure that infinities equal themselves
        || (Double.isNaN(a) && Double.isNaN(b));
  }

   * @since 13.0
   */
  public static boolean fuzzyEquals(double a, double b, double tolerance) {
    MathPreconditions.checkNonNegative("tolerance", tolerance);
    return Math.copySign(a - b, 1.0) <= tolerance
        // copySign(x, 1.0) is a branch-free version of abs(x), but with different NaN semantics
        || (a == b) // needed to ensure that infinities equal themselves
        || (Double.isNaN(a) && Double.isNaN(b));
  }

// license that can be found in the LICENSE file.

package cmp_test

import (
	"cmp"
	"fmt"
	"math"
	"slices"
	"sort"
	"strings"
	"testing"
	"unsafe"
)

var negzero = math.Copysign(0, -1)
var nonnilptr uintptr = uintptr(unsafe.Pointer(&negzero))
var nilptr uintptr = uintptr(unsafe.Pointer(nil))

var tests = []struct {
	x, y    any
	compare int
}{
	{1, 2, -1},
	{1, 1, 0},

		{float32(1.0) / float32(256), " 0.00390625 ", false},
		{float32(0), " 0 ", false},
		{math.Copysign(0, -1), " -0 ", false},
		{float64(1.0), " 1 ", false},
		{float64(-1.0), " -1 ", false},
		{float64(0.5), " 0.5 ", false},
		{float64(-0.5), " -0.5 ", false},
		{float64(0), " 0 ", false},
		{math.Copysign(0, -1), " -0 ", false},
		{"", `""`, false},
		{"foo", `"foo"`, false},
		// Newlines.

	m := make(map[float64]bool, 0)

	m[+0.0] = true
	m[math.Copysign(0.0, -1.0)] = true // should overwrite +0 entry

	if len(m) != 1 {
		t.Error("length wrong")
	}

	for k := range m {
		if math.Copysign(1.0, k) > 0 {
			t.Error("wrong sign")
		}
	}

	m = make(map[float64]bool, 0)
	m[math.Copysign(0.0, -1.0)] = true
	m[+0.0] = true // should overwrite -0.0 entry

	if len(m) != 1 {

		if i2 != i1 {
			t.Fatalf("unmarshaled %v, want %v:\n%s", i2, i1, buf)
		}
	}
}

func FuzzFloat64RoundTrip(f *testing.F) {
	f.Add(math.Float64bits(0))
	f.Add(math.Float64bits(math.Copysign(0, -1)))
	f.Add(math.Float64bits(math.MaxFloat64))
	f.Add(math.Float64bits(math.SmallestNonzeroFloat64))
	f.Add(math.Float64bits(math.NaN()))
	f.Add(uint64(0x7FF0000000000001)) // signaling NaN

					test(next(f, smaller), bits)
					if nfail > 50 {
						t.Fatalf("stopping test early")
					}
				}
			}
		}
	}
	test(0, 64)
	test(math.Copysign(0, -1), 64)
	test(0, 32)
	test(math.Copysign(0, -1), 32)
}

func TestMarshalRawMessageValue(t *testing.T) {
	type (
		T1 struct {
			M RawMessage `json:",omitempty"`
		}
		T2 struct {

		},
		{
			example: hex("3903e7"),
			decoded: int64(-1000),
		},
		{
			example: hex("f90000"),
			decoded: 0.0,
		},
		{
			example: hex("f98000"),
			decoded: math.Copysign(0, -1),
		},
		{
			example: hex("f93c00"),
			decoded: 1.0,
		},
		{
			example: hex("fb3ff199999999999a"),
			decoded: 1.1,
		},
		{
			example: hex("f93e00"),
			decoded: 1.5,