math: fns for gettng bit repr of float & vice versa

vlib/math/unsafe.v

@@ -0,0 +1,39 @@
+// Copyright (c) 2019 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 := *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 := *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 := *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 := *f64(&b)
+	return *p
+}