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