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js: math.big support, f{32,64}_bits,from_bits support, typeof(expr).name support (#11260)

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2021-08-21 17:18:57 +03:00
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parent 0d81d0c0c6
commit 2f6b2dd189
5 changed files with 304 additions and 1 deletions
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38
vlib/math/unsafe.v
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@ -1,38 +0,0 @@
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
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 := *unsafe { &u32(&f) }
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 := *unsafe { &f32(&b) }
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 := *unsafe { &u64(&f) }
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 := *unsafe { &f64(&b) }
return p
}