// 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)

		err(t, "cmp(%g, %g) = sw %v, %v, hw %v, %v\n", f, g, scmp, sisnan, hcmp, hisnan)
	}
}

func same(f, g float64) bool {
	if math.IsNaN(f) && math.IsNaN(g) {
		return true
	}
	if math.Copysign(1, f) != math.Copysign(1, g) {
		return false
	}
	return f == g

// Special cases are:
//
//	abs(±Inf) = +Inf
//	abs(NaN) = NaN
func abs(x float64) float64 {
	const sign = 1 << 63
	return float64frombits(float64bits(x) &^ sign)
}

// copysign returns a value with the magnitude
// of x and the sign of y.
func copysign(x, y float64) float64 {
	const sign = 1 << 63
	return float64frombits(float64bits(x)&^sign | float64bits(y)&sign)
}

// float64bits returns the IEEE 754 binary representation of f.

func Nextafter32(x, y float32) (r float32) {
	switch {
	case IsNaN(float64(x)) || IsNaN(float64(y)): // special case
		r = float32(NaN())
	case x == y:
		r = x
	case x == 0:
		r = float32(Copysign(float64(Float32frombits(1)), float64(y)))
	case (y > x) == (x > 0):
		r = Float32frombits(Float32bits(x) + 1)
	default:
		r = Float32frombits(Float32bits(x) - 1)
	}
	return
}

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  <dictionary name="svyatoslav.kuzmich">
    <words>
      <w>anyfunc</w>
      <w>copysign</w>
      <w>eqref</w>
      <w>exnref</w>
      <w>externref</w>
      <w>funcref</w>
      <w>jetbrains</w>
      <w>kotlinx</w>
      <w>ktor</w>
      <w>optref</w>
      <w>popcnt</w>
      <w>rotl</w>
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      <w>sqrt</w>
      <w>testsuite</w>

// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import "math"

func main() {
	println(math.Copysign(0, -1))

	case IsInf(frac, 0) || IsNaN(frac):
		return frac
	}
	frac, e := normalize(frac)
	exp += e
	x := Float64bits(frac)
	exp += int(x>>shift)&mask - bias
	if exp < -1075 {
		return Copysign(0, frac) // underflow
	}
	if exp > 1023 { // overflow
		if frac < 0 {
			return Inf(-1)
		}
		return Inf(1)
	}
	var m float64 = 1
	if exp < -1022 { // denormal
		exp += 53

// 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));
  }