File: modf.go

package info (click to toggle)
gcc-avr 1%3A5.4.0%2BAtmel3.6.2-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 589,872 kB
  • sloc: ansic: 2,775,581; ada: 756,757; cpp: 723,977; f90: 117,673; asm: 66,898; makefile: 62,755; xml: 44,466; sh: 29,549; exp: 23,315; objc: 15,216; fortran: 10,901; pascal: 4,185; python: 4,093; perl: 2,969; awk: 2,811; ml: 2,385; cs: 879; yacc: 316; lex: 198; haskell: 112; lisp: 8
file content (36 lines) | stat: -rw-r--r-- 796 bytes parent folder | download | duplicates (5) 
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
35
36
 
// 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) {
	return modf(f)
}

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
}