7a9389330e
gcc/: * gcc.c (default_compilers): Add entry for ".go". * common.opt: Add -static-libgo as a driver option. * doc/install.texi (Configuration): Mention libgo as an option for --enable-shared. Mention go as an option for --enable-languages. * doc/invoke.texi (Overall Options): Mention .go as a file name suffix. Mention go as a -x option. * doc/frontends.texi (G++ and GCC): Mention Go as a supported language. * doc/sourcebuild.texi (Top Level): Mention libgo. * doc/standards.texi (Standards): Add section on Go language. Move references for other languages into their own section. * doc/contrib.texi (Contributors): Mention that I contributed the Go frontend. gcc/testsuite/: * lib/go.exp: New file. * lib/go-dg.exp: New file. * lib/go-torture.exp: New file. * lib/target-supports.exp (check_compile): Match // Go. From-SVN: r167407
29 lines
528 B
Go
29 lines
528 B
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package math
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/*
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Floating-point hyperbolic tangent.
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Sinh and Cosh are called except for large arguments, which
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would cause overflow improperly.
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*/
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// Tanh computes the hyperbolic tangent of x.
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func Tanh(x float64) float64 {
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if x < 0 {
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x = -x
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if x > 21 {
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return -1
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}
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return -Sinh(x) / Cosh(x)
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}
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if x > 21 {
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return 1
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}
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return Sinh(x) / Cosh(x)
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}
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