1// Copyright 2009 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
5package math
6
7import "unsafe"
8
9// Despite being an exported symbol,
10// Float32bits is linknamed by widely used packages.
11// Notable members of the hall of shame include:
12//   - gitee.com/quant1x/num
13//
14// Do not remove or change the type signature.
15// See go.dev/issue/67401.
16//
17// Note that this comment is not part of the doc comment.
18//
19//go:linkname Float32bits
20
21// Float32bits returns the IEEE 754 binary representation of f,
22// with the sign bit of f and the result in the same bit position.
23// Float32bits(Float32frombits(x)) == x.
24func Float32bits(f float32) uint32 { return *(*uint32)(unsafe.Pointer(&f)) }
25
26// Float32frombits returns the floating-point number corresponding
27// to the IEEE 754 binary representation b, with the sign bit of b
28// and the result in the same bit position.
29// Float32frombits(Float32bits(x)) == x.
30func Float32frombits(b uint32) float32 { return *(*float32)(unsafe.Pointer(&b)) }
31
32// Float64bits returns the IEEE 754 binary representation of f,
33// with the sign bit of f and the result in the same bit position,
34// and Float64bits(Float64frombits(x)) == x.
35func Float64bits(f float64) uint64 { return *(*uint64)(unsafe.Pointer(&f)) }
36
37// Float64frombits returns the floating-point number corresponding
38// to the IEEE 754 binary representation b, with the sign bit of b
39// and the result in the same bit position.
40// Float64frombits(Float64bits(x)) == x.
41func Float64frombits(b uint64) float64 { return *(*float64)(unsafe.Pointer(&b)) }
42