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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2010-12-03 04:34:57 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2010-12-03 04:34:57 +0000 |
| commit | 7a9389330e91acc3ed05deac2d198af25d13cf3c (patch) | |
| tree | 38fe54a4f38ede5d949c915d66191f24a6fe5153 /libgo/go/math/const.go | |
| parent | 1aa6700378e5188a853c018256113ce6e1fb5c05 (diff) | |
| download | gcc-7a9389330e91acc3ed05deac2d198af25d13cf3c.zip gcc-7a9389330e91acc3ed05deac2d198af25d13cf3c.tar.gz gcc-7a9389330e91acc3ed05deac2d198af25d13cf3c.tar.bz2 | |
Add Go frontend, libgo library, and Go testsuite.
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
Diffstat (limited to 'libgo/go/math/const.go')
| -rw-r--r-- | libgo/go/math/const.go | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libgo/go/math/const.go b/libgo/go/math/const.go new file mode 100644 index 0000000..6a78d00 --- /dev/null +++ b/libgo/go/math/const.go @@ -0,0 +1,53 @@ +// 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. + +// The math package provides basic constants and mathematical functions. +package math + +// Mathematical constants. +// Reference: http://www.research.att.com/~njas/sequences/Axxxxxx +const ( + E = 2.71828182845904523536028747135266249775724709369995957496696763 // A001113 + Pi = 3.14159265358979323846264338327950288419716939937510582097494459 // A000796 + Phi = 1.61803398874989484820458683436563811772030917980576286213544862 // A001622 + + Sqrt2 = 1.41421356237309504880168872420969807856967187537694807317667974 // A002193 + SqrtE = 1.64872127070012814684865078781416357165377610071014801157507931 // A019774 + SqrtPi = 1.77245385090551602729816748334114518279754945612238712821380779 // A002161 + SqrtPhi = 1.27201964951406896425242246173749149171560804184009624861664038 // A139339 + + Ln2 = 0.693147180559945309417232121458176568075500134360255254120680009 // A002162 + Log2E = 1 / Ln2 + Ln10 = 2.30258509299404568401799145468436420760110148862877297603332790 // A002392 + Log10E = 1 / Ln10 +) + +// Floating-point limit values. +// Max is the largest finite value representable by the type. +// Min is the smallest nonzero value representable by the type. +const ( + MaxFloat32 = 3.40282346638528859811704183484516925440e+38 /* 2**127 * (2**24 - 1) / 2**23 */ + MinFloat32 = 1.401298464324817070923729583289916131280e-45 /* 1 / 2**(127 - 1 + 23) */ + + MaxFloat64 = 1.797693134862315708145274237317043567981e+308 /* 2**1023 * (2**53 - 1) / 2**52 */ + MinFloat64 = 4.940656458412465441765687928682213723651e-324 /* 1 / 2**(1023 - 1 + 52) */ +) + +// Integer limit values. +const ( + MaxInt8 = 1<<7 - 1 + MinInt8 = -1 << 7 + MaxInt16 = 1<<15 - 1 + MinInt16 = -1 << 15 + MaxInt32 = 1<<31 - 1 + MinInt32 = -1 << 31 + MaxInt64 = 1<<63 - 1 + MinInt64 = -1 << 63 + MaxUint8 = 1<<8 - 1 + MaxUint16 = 1<<16 - 1 + MaxUint32 = 1<<32 - 1 + MaxUint64 = 1<<64 - 1 +) + +// BUG(rsc): The manual should define the special cases for all of these functions. |