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Current Path: /opt/golang/1.17.2/src/math

📁 ..
📄 abs.go(363 B)
📄 acos_s390x.s(3.73 KB)
📄 acosh.go(1.71 KB)
📄 acosh_s390x.s(4.32 KB)
📄 all_test.go(85.27 KB)
📄 arith_s390x.go(3.73 KB)
📄 arith_s390x_test.go(10.78 KB)
📄 asin.go(1.08 KB)
📄 asin_s390x.s(4.16 KB)
📄 asinh.go(1.92 KB)
📄 asinh_s390x.s(5.74 KB)
📄 atan.go(3.03 KB)
📄 atan2.go(1.52 KB)
📄 atan2_s390x.s(6.93 KB)
📄 atan_s390x.s(3.69 KB)
📄 atanh.go(1.99 KB)
📄 atanh_s390x.s(5.36 KB)
📁 big
📁 bits
📄 bits.go(1.87 KB)
📄 cbrt.go(2.31 KB)
📄 cbrt_s390x.s(4.89 KB)
📁 cmplx
📄 const.go(2.33 KB)
📄 const_test.go(1.29 KB)
📄 copysign.go(378 B)
📄 cosh_s390x.s(5.59 KB)
📄 dim.go(1.68 KB)
📄 dim_amd64.s(1.92 KB)
📄 dim_arm64.s(963 B)
📄 dim_asm.go(380 B)
📄 dim_noasm.go(450 B)
📄 dim_riscv64.s(1.16 KB)
📄 dim_s390x.s(1.97 KB)
📄 erf.go(11.5 KB)
📄 erf_s390x.s(8.5 KB)
📄 erfc_s390x.s(14.4 KB)
📄 erfinv.go(3.36 KB)
📄 example_test.go(3.66 KB)
📄 exp.go(5.37 KB)
📄 exp2_asm.go(268 B)
📄 exp2_noasm.go(301 B)
📄 exp_amd64.go(277 B)
📄 exp_amd64.s(4.24 KB)
📄 exp_arm64.s(5.36 KB)
📄 exp_asm.go(296 B)
📄 exp_noasm.go(333 B)
📄 exp_s390x.s(4.65 KB)
📄 expm1.go(7.9 KB)
📄 expm1_s390x.s(5.29 KB)
📄 export_s390x_test.go(732 B)
📄 export_test.go(357 B)
📄 floor.go(3.28 KB)
📄 floor_386.s(1.47 KB)
📄 floor_amd64.s(2 KB)
📄 floor_arm64.s(573 B)
📄 floor_asm.go(482 B)
📄 floor_noasm.go(589 B)
📄 floor_ppc64x.s(523 B)
📄 floor_s390x.s(579 B)
📄 floor_wasm.s(459 B)
📄 fma.go(4.46 KB)
📄 frexp.go(926 B)
📄 gamma.go(5.52 KB)
📄 huge_test.go(2.56 KB)
📄 hypot.go(845 B)
📄 hypot_386.s(1.81 KB)
📄 hypot_amd64.s(1.05 KB)
📄 hypot_asm.go(284 B)
📄 hypot_noasm.go(319 B)
📄 j0.go(13.6 KB)
📄 j1.go(13.3 KB)
📄 jn.go(7.17 KB)
📄 ldexp.go(1.05 KB)
📄 lgamma.go(11.02 KB)
📄 log.go(3.86 KB)
📄 log10.go(869 B)
📄 log10_s390x.s(4.73 KB)
📄 log1p.go(6.34 KB)
📄 log1p_s390x.s(5.15 KB)
📄 log_amd64.s(3.67 KB)
📄 log_asm.go(281 B)
📄 log_s390x.s(4.31 KB)
📄 log_stub.go(316 B)
📄 logb.go(1014 B)
📄 mod.go(900 B)
📄 modf.go(910 B)
📄 modf_arm64.s(447 B)
📄 modf_asm.go(322 B)
📄 modf_noasm.go(359 B)
📄 modf_ppc64x.s(440 B)
📄 nextafter.go(1.2 KB)
📄 pow.go(3.22 KB)
📄 pow10.go(1.24 KB)
📄 pow_s390x.s(16.27 KB)
📁 rand
📄 remainder.go(2.04 KB)
📄 signbit.go(302 B)
📄 sin.go(6.35 KB)
📄 sin_s390x.s(8.34 KB)
📄 sincos.go(1.75 KB)
📄 sinh.go(1.69 KB)
📄 sinh_s390x.s(5.98 KB)
📄 sqrt.go(4.9 KB)
📄 sqrt_386.s(304 B)
📄 sqrt_amd64.s(334 B)
📄 sqrt_arm.s(529 B)
📄 sqrt_arm64.s(310 B)
📄 sqrt_asm.go(416 B)
📄 sqrt_mipsx.s(409 B)
📄 sqrt_noasm.go(469 B)
📄 sqrt_ppc64x.s(362 B)
📄 sqrt_riscv64.s(308 B)
📄 sqrt_s390x.s(309 B)
📄 sqrt_wasm.s(273 B)
📄 stubs.go(2.59 KB)
📄 stubs_s390x.s(12.38 KB)
📄 tan.go(3.67 KB)
📄 tan_s390x.s(2.73 KB)
📄 tanh.go(2.65 KB)
📄 tanh_s390x.s(4.57 KB)
📄 trig_reduce.go(3.33 KB)
📄 unsafe.go(1.27 KB)

Editing: huge_test.go

// Copyright 2018 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.

// Disabled for s390x because it uses assembly routines that are not
// accurate for huge arguments.

//go:build !s390x
// +build !s390x

package math_test

import (
	. "math"
	"testing"
)

// Inputs to test trig_reduce
var trigHuge = []float64{
	1 << 28,
	1 << 29,
	1 << 30,
	1 << 35,
	1 << 120,
	1 << 240,
	1 << 480,
	1234567891234567 << 180,
	1234567891234567 << 300,
	MaxFloat64,
}

// Results for trigHuge[i] calculated with https://github.com/robpike/ivy
// using 4096 bits of working precision.   Values requiring less than
// 102 decimal digits (1 << 120, 1 << 240, 1 << 480, 1234567891234567 << 180)
// were confirmed via https://keisan.casio.com/
var cosHuge = []float64{
	-0.16556897949057876,
	-0.94517382606089662,
	0.78670712294118812,
	-0.76466301249635305,
	-0.92587902285483787,
	0.93601042593353793,
	-0.28282777640193788,
	-0.14616431394103619,
	-0.79456058210671406,
	-0.99998768942655994,
}

var sinHuge = []float64{
	-0.98619821183697566,
	0.32656766301856334,
	-0.61732641504604217,
	-0.64443035102329113,
	0.37782010936075202,
	-0.35197227524865778,
	0.95917070894368716,
	0.98926032637023618,
	-0.60718488235646949,
	0.00496195478918406,
}

var tanHuge = []float64{
	5.95641897939639421,
	-0.34551069233430392,
	-0.78469661331920043,
	0.84276385870875983,
	-0.40806638884180424,
	-0.37603456702698076,
	-3.39135965054779932,
	-6.76813854009065030,
	0.76417695016604922,
	-0.00496201587444489,
}

// Check that trig values of huge angles return accurate results.
// This confirms that argument reduction works for very large values
// up to MaxFloat64.
func TestHugeCos(t *testing.T) {
	for i := 0; i < len(trigHuge); i++ {
		f1 := cosHuge[i]
		f2 := Cos(trigHuge[i])
		if !close(f1, f2) {
			t.Errorf("Cos(%g) = %g, want %g", trigHuge[i], f2, f1)
		}
	}
}

func TestHugeSin(t *testing.T) {
	for i := 0; i < len(trigHuge); i++ {
		f1 := sinHuge[i]
		f2 := Sin(trigHuge[i])
		if !close(f1, f2) {
			t.Errorf("Sin(%g) = %g, want %g", trigHuge[i], f2, f1)
		}
	}
}

func TestHugeSinCos(t *testing.T) {
	for i := 0; i < len(trigHuge); i++ {
		f1, g1 := sinHuge[i], cosHuge[i]
		f2, g2 := Sincos(trigHuge[i])
		if !close(f1, f2) || !close(g1, g2) {
			t.Errorf("Sincos(%g) = %g, %g, want %g, %g", trigHuge[i], f2, g2, f1, g1)
		}
	}
}

func TestHugeTan(t *testing.T) {
	for i := 0; i < len(trigHuge); i++ {
		f1 := tanHuge[i]
		f2 := Tan(trigHuge[i])
		if !close(f1, f2) {
			t.Errorf("Tan(%g) = %g, want %g", trigHuge[i], f2, f1)
		}
	}
}

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Editing: huge_test.go

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