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Diffstat (limited to 'src/pkg/math/pow10.go')
-rw-r--r-- | src/pkg/math/pow10.go | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/src/pkg/math/pow10.go b/src/pkg/math/pow10.go deleted file mode 100644 index f5ad28bb4..000000000 --- a/src/pkg/math/pow10.go +++ /dev/null @@ -1,40 +0,0 @@ -// 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 - -// This table might overflow 127-bit exponent representations. -// In that case, truncate it after 1.0e38. -var pow10tab [70]float64 - -// Pow10 returns 10**e, the base-10 exponential of e. -// -// Special cases are: -// Pow10(e) = +Inf for e > 309 -// Pow10(e) = 0 for e < -324 -func Pow10(e int) float64 { - if e <= -325 { - return 0 - } else if e > 309 { - return Inf(1) - } - - if e < 0 { - return 1 / Pow10(-e) - } - if e < len(pow10tab) { - return pow10tab[e] - } - m := e / 2 - return Pow10(m) * Pow10(e-m) -} - -func init() { - pow10tab[0] = 1.0e0 - pow10tab[1] = 1.0e1 - for i := 2; i < len(pow10tab); i++ { - m := i / 2 - pow10tab[i] = pow10tab[m] * pow10tab[i-m] - } -} |