blob: 38ee16710c05e029038c8c670d9575ebc265ae54 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
module math
// f32_bits returns the IEEE 754 binary representation of f,
// with the sign bit of f and the result in the same bit position.
// f32_bits(f32_from_bits(x)) == x.
pub fn f32_bits(f f32) u32 {
p := u32(0)
#let buffer = new ArrayBuffer(4)
#let floatArr = new Float32Array(buffer)
#floatArr[0] = f.val
#let uintArr = new Uint32Array(buffer)
#p.val = uintArr[0]
return p
}
// f32_from_bits returns the floating-point number corresponding
// to the IEEE 754 binary representation b, with the sign bit of b
// and the result in the same bit position.
// f32_from_bits(f32_bits(x)) == x.
pub fn f32_from_bits(b u32) f32 {
p := f32(0.0)
#let buffer = new ArrayBuffer(4)
#let floatArr = new Float32Array(buffer)
#let uintArr = new Uint32Array(buffer)
#uintArr[0] = Number(b.val)
#p.val = floatArr[0]
return p
}
// f64_bits returns the IEEE 754 binary representation of f,
// with the sign bit of f and the result in the same bit position,
// and f64_bits(f64_from_bits(x)) == x.
pub fn f64_bits(f f64) u64 {
p := u64(0)
#let buffer = new ArrayBuffer(8)
#let floatArr = new Float64Array(buffer)
#floatArr[0] = f.val
#let uintArr = new BigUint64Array(buffer)
#p.val = uintArr[0]
return p
}
// f64_from_bits returns the floating-point number corresponding
// to the IEEE 754 binary representation b, with the sign bit of b
// and the result in the same bit position.
// f64_from_bits(f64_bits(x)) == x.
pub fn f64_from_bits(b u64) f64 {
p := 0.0
#let buffer = new ArrayBuffer(8)
#let floatArr = new Float64Array(buffer)
#let uintArr = new BigUint64Array(buffer)
#uintArr[0] = Number(b.val)
#p.val = floatArr[0]
return p
}
|
