OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [math/] [dim.go] - Blame information for rev 833

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 747 jeremybenn 
// Copyright 2010 The Go Authors. All rights reserved.
2 
// Use of this source code is governed by a BSD-style
3 
// license that can be found in the LICENSE file.
4 
 
5 
package math
6 
 
7 
// Dim returns the maximum of x-y or 0.
8 
//
9 
// Special cases are:
10 
//      Dim(+Inf, +Inf) = NaN
11 
//      Dim(-Inf, -Inf) = NaN
12 
//      Dim(x, NaN) = Dim(NaN, x) = NaN
13 
func Dim(x, y float64) float64 {
14 
        return dim(x, y)
15 
}
16 
 
17 
func dim(x, y float64) float64 {
18 
        return max(x-y, 0)
19 
}
20 
 
21 
// Max returns the larger of x or y.
22 
//
23 
// Special cases are:
24 
//      Max(x, +Inf) = Max(+Inf, x) = +Inf
25 
//      Max(x, NaN) = Max(NaN, x) = NaN
26 
//      Max(+0, ±0) = Max(±0, +0) = +0
27 
//      Max(-0, -0) = -0
28 
func Max(x, y float64) float64 {
29 
        return max(x, y)
30 
}
31 
 
32 
func max(x, y float64) float64 {
33 
        // special cases
34 
        switch {
35 
        case IsInf(x, 1) || IsInf(y, 1):
36 
                return Inf(1)
37 
        case IsNaN(x) || IsNaN(y):
38 
                return NaN()
39 
        case x == 0 && x == y:
40 
                if Signbit(x) {
41 
                        return y
42 
                }
43 
                return x
44 
        }
45 
        if x > y {
46 
                return x
47 
        }
48 
        return y
49 
}
50 
 
51 
// Min returns the smaller of x or y.
52 
//
53 
// Special cases are:
54 
//      Min(x, -Inf) = Min(-Inf, x) = -Inf
55 
//      Min(x, NaN) = Min(NaN, x) = NaN
56 
//      Min(-0, ±0) = Min(±0, -0) = -0
57 
func Min(x, y float64) float64 {
58 
        return min(x, y)
59 
}
60 
 
61 
func min(x, y float64) float64 {
62 
        // special cases
63 
        switch {
64 
        case IsInf(x, -1) || IsInf(y, -1):
65 
                return Inf(-1)
66 
        case IsNaN(x) || IsNaN(y):
67 
                return NaN()
68 
        case x == 0 && x == y:
69 
                if Signbit(x) {
70 
                        return x
71 
                }
72 
                return y
73 
        }
74 
        if x < y {
75 
                return x
76 
        }
77 
        return y
78 
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.