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-rw-r--r--src/pkg/math/ldexp.go45
1 files changed, 0 insertions, 45 deletions
diff --git a/src/pkg/math/ldexp.go b/src/pkg/math/ldexp.go
deleted file mode 100644
index b5d2a5e7e..000000000
--- a/src/pkg/math/ldexp.go
+++ /dev/null
@@ -1,45 +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
-
-// Ldexp is the inverse of Frexp.
-// It returns frac × 2**exp.
-//
-// Special cases are:
-// Ldexp(±0, exp) = ±0
-// Ldexp(±Inf, exp) = ±Inf
-// Ldexp(NaN, exp) = NaN
-func Ldexp(frac float64, exp int) float64
-
-func ldexp(frac float64, exp int) float64 {
- // special cases
- switch {
- case frac == 0:
- return frac // correctly return -0
- case IsInf(frac, 0) || IsNaN(frac):
- return frac
- }
- frac, e := normalize(frac)
- exp += e
- x := Float64bits(frac)
- exp += int(x>>shift)&mask - bias
- if exp < -1074 {
- return Copysign(0, frac) // underflow
- }
- if exp > 1023 { // overflow
- if frac < 0 {
- return Inf(-1)
- }
- return Inf(1)
- }
- var m float64 = 1
- if exp < -1022 { // denormal
- exp += 52
- m = 1.0 / (1 << 52) // 2**-52
- }
- x &^= mask << shift
- x |= uint64(exp+bias) << shift
- return m * Float64frombits(x)
-}