-// Copyright 2023 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
-
-func sign[I int32 | int64](a, b I) int {
- if a < b {
- return -1
- }
- if a > b {
- return 1
- }
- return 0
-}
-
-// Compare compares a and b such that
-// -NaN is ordered before any other value,
-// +NaN is ordered after any other value,
-// and -0 is ordered before +0.
-// In other words, it defines a total order over floats
-// (according to the total-ordering predicate in IEEE-754, section 5.10).
-// It returns 0 if a == b, -1 if a < b, and +1 if a > b.
-func Compare(a, b float64) int {
- // Perform a bitwise comparison (a < b) by casting the float64s into an int64s.
- x := int64(Float64bits(a))
- y := int64(Float64bits(b))
-
- // If a and b are both negative, flip the comparison so that we check a > b.
- if x < 0 && y < 0 {
- return sign(y, x)
- }
- return sign(x, y)
-}
-
-// Compare32 compares a and b such that
-// -NaN is ordered before any other value,
-// +NaN is ordered after any other value,
-// and -0 is ordered before +0.
-// In other words, it defines a total order over floats
-// (according to the total-ordering predicate in IEEE-754, section 5.10).
-// It returns 0 if a == b, -1 if a < b, and +1 if a > b.
-func Compare32(a, b float32) int {
- // Perform a bitwise comparison (a < b) by casting the float32s into an int32s.
- x := int32(Float32bits(a))
- y := int32(Float32bits(b))
-
- // If a and b are both negative, flip the comparison so that we check a > b.
- if x < 0 && y < 0 {
- return sign(y, x)
- }
- return sign(x, y)
-}