Black Lives Matter. Support the Equal Justice Initiative.

# Source file src/math/modf.go

## Documentation: math

```     1  // Copyright 2009 The Go Authors. All rights reserved.
2  // Use of this source code is governed by a BSD-style
4
5  package math
6
7  // Modf returns integer and fractional floating-point numbers
8  // that sum to f. Both values have the same sign as f.
9  //
10  // Special cases are:
11  //	Modf(±Inf) = ±Inf, NaN
12  //	Modf(NaN) = NaN, NaN
13  func Modf(f float64) (int float64, frac float64)
14
15  func modf(f float64) (int float64, frac float64) {
16  	if f < 1 {
17  		switch {
18  		case f < 0:
19  			int, frac = Modf(-f)
20  			return -int, -frac
21  		case f == 0:
22  			return f, f // Return -0, -0 when f == -0
23  		}
24  		return 0, f
25  	}
26
27  	x := Float64bits(f)
28  	e := uint(x>>shift)&mask - bias
29
30  	// Keep the top 12+e bits, the integer part; clear the rest.
31  	if e < 64-12 {
32  		x &^= 1<<(64-12-e) - 1
33  	}
34  	int = Float64frombits(x)
35  	frac = f - int
36  	return
37  }
38
```

View as plain text