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

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📄 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: sincos.go

// Copyright 2010 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 math

// Coefficients _sin[] and _cos[] are found in pkg/math/sin.go.

// Sincos returns Sin(x), Cos(x).
//
// Special cases are:
//	Sincos(±0) = ±0, 1
//	Sincos(±Inf) = NaN, NaN
//	Sincos(NaN) = NaN, NaN
func Sincos(x float64) (sin, cos float64) {
	const (
		PI4A = 7.85398125648498535156e-1  // 0x3fe921fb40000000, Pi/4 split into three parts
		PI4B = 3.77489470793079817668e-8  // 0x3e64442d00000000,
		PI4C = 2.69515142907905952645e-15 // 0x3ce8469898cc5170,
	)
	// special cases
	switch {
	case x == 0:
		return x, 1 // return ±0.0, 1.0
	case IsNaN(x) || IsInf(x, 0):
		return NaN(), NaN()
	}

// make argument positive
	sinSign, cosSign := false, false
	if x < 0 {
		x = -x
		sinSign = true
	}

var j uint64
	var y, z float64
	if x >= reduceThreshold {
		j, z = trigReduce(x)
	} else {
		j = uint64(x * (4 / Pi)) // integer part of x/(Pi/4), as integer for tests on the phase angle
		y = float64(j)           // integer part of x/(Pi/4), as float

if j&1 == 1 { // map zeros to origin
			j++
			y++
		}
		j &= 7                               // octant modulo 2Pi radians (360 degrees)
		z = ((x - y*PI4A) - y*PI4B) - y*PI4C // Extended precision modular arithmetic
	}
	if j > 3 { // reflect in x axis
		j -= 4
		sinSign, cosSign = !sinSign, !cosSign
	}
	if j > 1 {
		cosSign = !cosSign
	}

zz := z * z
	cos = 1.0 - 0.5*zz + zz*zz*((((((_cos[0]*zz)+_cos[1])*zz+_cos[2])*zz+_cos[3])*zz+_cos[4])*zz+_cos[5])
	sin = z + z*zz*((((((_sin[0]*zz)+_sin[1])*zz+_sin[2])*zz+_sin[3])*zz+_sin[4])*zz+_sin[5])
	if j == 1 || j == 2 {
		sin, cos = cos, sin
	}
	if cosSign {
		cos = -cos
	}
	if sinSign {
		sin = -sin
	}
	return
}

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Editing: sincos.go

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