blob: 1e8376a93819f23d13a282bcae550f4efcb0a88e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
// 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
// Modf returns integer and fractional floating-point numbers
// that sum to f. Both values have the same sign as f.
//
// Special cases are:
// Modf(±Inf) = ±Inf, NaN
// Modf(NaN) = NaN, NaN
func Modf(f float64) (int float64, frac float64)
func modf(f float64) (int float64, frac float64) {
if f < 1 {
if f < 0 {
int, frac = Modf(-f)
return -int, -frac
}
return 0, f
}
x := Float64bits(f)
e := uint(x>>shift)&mask - bias
// Keep the top 12+e bits, the integer part; clear the rest.
if e < 64-12 {
x &^= 1<<(64-12-e) - 1
}
int = Float64frombits(x)
frac = f - int
return
}
|
