1 // 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.
7 // Dim returns the maximum of x-y or 0.
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 // The special cases result in NaN after the subtraction:
24 // v is positive or NaN
28 // Max returns the larger of x or y.
31 // Max(x, +Inf) = Max(+Inf, x) = +Inf
32 // Max(x, NaN) = Max(NaN, x) = NaN
33 // Max(+0, ±0) = Max(±0, +0) = +0
35 func Max(x
, y
float64) float64 {
42 func max(x
, y
float64) float64 {
45 case IsInf(x
, 1) ||
IsInf(y
, 1):
47 case IsNaN(x
) ||
IsNaN(y
):
49 case x
== 0 && x
== y
:
61 // Min returns the smaller of x or y.
64 // Min(x, -Inf) = Min(-Inf, x) = -Inf
65 // Min(x, NaN) = Min(NaN, x) = NaN
66 // Min(-0, ±0) = Min(±0, -0) = -0
67 func Min(x
, y
float64) float64 {
74 func min(x
, y
float64) float64 {
77 case IsInf(x
, -1) ||
IsInf(y
, -1):
79 case IsNaN(x
) ||
IsNaN(y
):
81 case x
== 0 && x
== y
: