60 lines
1.6 KiB
V
60 lines
1.6 KiB
V
module math
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// f32_bits returns the IEEE 754 binary representation of f,
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// with the sign bit of f and the result in the same bit position.
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// f32_bits(f32_from_bits(x)) == x.
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pub fn f32_bits(f f32) u32 {
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p := u32(0)
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#let buffer = new ArrayBuffer(4)
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#let floatArr = new Float32Array(buffer)
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#floatArr[0] = f.val
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#let uintArr = new Uint32Array(buffer)
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#p.val = uintArr[0]
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return p
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}
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// f32_from_bits returns the floating-point number corresponding
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// to the IEEE 754 binary representation b, with the sign bit of b
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// and the result in the same bit position.
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// f32_from_bits(f32_bits(x)) == x.
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pub fn f32_from_bits(b u32) f32 {
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p := f32(0.0)
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#let buffer = new ArrayBuffer(4)
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#let floatArr = new Float32Array(buffer)
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#let uintArr = new Uint32Array(buffer)
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#uintArr[0] = Number(b.val)
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#p.val = floatArr[0]
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return p
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}
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// f64_bits returns the IEEE 754 binary representation of f,
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// with the sign bit of f and the result in the same bit position,
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// and f64_bits(f64_from_bits(x)) == x.
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pub fn f64_bits(f f64) u64 {
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p := u64(0)
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#let buffer = new ArrayBuffer(8)
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#let floatArr = new Float64Array(buffer)
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#floatArr[0] = f.val
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#let uintArr = new BigUint64Array(buffer)
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#p.val = uintArr[0]
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return p
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}
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// f64_from_bits returns the floating-point number corresponding
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// to the IEEE 754 binary representation b, with the sign bit of b
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// and the result in the same bit position.
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// f64_from_bits(f64_bits(x)) == x.
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pub fn f64_from_bits(b u64) f64 {
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p := 0.0
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#let buffer = new ArrayBuffer(8)
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#let floatArr = new Float64Array(buffer)
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#let uintArr = new BigUint64Array(buffer)
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#uintArr[0] = b.val
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#p.val = floatArr[0]
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return p
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}
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