unsafe.go

     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  
     5  package math
     6  
     7  import "unsafe"
     8  
     9  // Float32bits returns the IEEE 754 binary representation of f,
    10  // with the sign bit of f and the result in the same bit position.
    11  // Float32bits(Float32frombits(x)) == x.
    12  func Float32bits(f float32) uint32 { return *(*uint32)(unsafe.Pointer(&f)) }
    13  
    14  // Float32frombits returns the floating-point number corresponding
    15  // to the IEEE 754 binary representation b, with the sign bit of b
    16  // and the result in the same bit position.
    17  // Float32frombits(Float32bits(x)) == x.
    18  func Float32frombits(b uint32) float32 { return *(*float32)(unsafe.Pointer(&b)) }
    19  
    20  // Float64bits returns the IEEE 754 binary representation of f,
    21  // with the sign bit of f and the result in the same bit position,
    22  // and Float64bits(Float64frombits(x)) == x.
    23  func Float64bits(f float64) uint64 { return *(*uint64)(unsafe.Pointer(&f)) }
    24  
    25  // Float64frombits returns the floating-point number corresponding
    26  // to the IEEE 754 binary representation b, with the sign bit of b
    27  // and the result in the same bit position.
    28  // Float64frombits(Float64bits(x)) == x.
    29  func Float64frombits(b uint64) float64 { return *(*float64)(unsafe.Pointer(&b)) }
    30
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