From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:19:13 +0200 Subject: Adding upstream version 1.21.8. Signed-off-by: Daniel Baumann --- src/math/const.go | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 src/math/const.go (limited to 'src/math/const.go') diff --git a/src/math/const.go b/src/math/const.go new file mode 100644 index 0000000..b15e50e --- /dev/null +++ b/src/math/const.go @@ -0,0 +1,57 @@ +// Copyright 2009 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 provides basic constants and mathematical functions. +// +// This package does not guarantee bit-identical results across architectures. +package math + +// Mathematical constants. +const ( + E = 2.71828182845904523536028747135266249775724709369995957496696763 // https://oeis.org/A001113 + Pi = 3.14159265358979323846264338327950288419716939937510582097494459 // https://oeis.org/A000796 + Phi = 1.61803398874989484820458683436563811772030917980576286213544862 // https://oeis.org/A001622 + + Sqrt2 = 1.41421356237309504880168872420969807856967187537694807317667974 // https://oeis.org/A002193 + SqrtE = 1.64872127070012814684865078781416357165377610071014801157507931 // https://oeis.org/A019774 + SqrtPi = 1.77245385090551602729816748334114518279754945612238712821380779 // https://oeis.org/A002161 + SqrtPhi = 1.27201964951406896425242246173749149171560804184009624861664038 // https://oeis.org/A139339 + + Ln2 = 0.693147180559945309417232121458176568075500134360255254120680009 // https://oeis.org/A002162 + Log2E = 1 / Ln2 + Ln10 = 2.30258509299404568401799145468436420760110148862877297603332790 // https://oeis.org/A002392 + Log10E = 1 / Ln10 +) + +// Floating-point limit values. +// Max is the largest finite value representable by the type. +// SmallestNonzero is the smallest positive, non-zero value representable by the type. +const ( + MaxFloat32 = 0x1p127 * (1 + (1 - 0x1p-23)) // 3.40282346638528859811704183484516925440e+38 + SmallestNonzeroFloat32 = 0x1p-126 * 0x1p-23 // 1.401298464324817070923729583289916131280e-45 + + MaxFloat64 = 0x1p1023 * (1 + (1 - 0x1p-52)) // 1.79769313486231570814527423731704356798070e+308 + SmallestNonzeroFloat64 = 0x1p-1022 * 0x1p-52 // 4.9406564584124654417656879286822137236505980e-324 +) + +// Integer limit values. +const ( + intSize = 32 << (^uint(0) >> 63) // 32 or 64 + + MaxInt = 1<<(intSize-1) - 1 // MaxInt32 or MaxInt64 depending on intSize. + MinInt = -1 << (intSize - 1) // MinInt32 or MinInt64 depending on intSize. + MaxInt8 = 1<<7 - 1 // 127 + MinInt8 = -1 << 7 // -128 + MaxInt16 = 1<<15 - 1 // 32767 + MinInt16 = -1 << 15 // -32768 + MaxInt32 = 1<<31 - 1 // 2147483647 + MinInt32 = -1 << 31 // -2147483648 + MaxInt64 = 1<<63 - 1 // 9223372036854775807 + MinInt64 = -1 << 63 // -9223372036854775808 + MaxUint = 1<