]> git.lizzy.rs Git - rust.git/blob - tests/ui/consts/const-float-bits-conv.rs
Rollup merge of #106951 - tmiasko:rm-simplify-initial, r=oli-obk
[rust.git] / tests / ui / consts / const-float-bits-conv.rs
1 // compile-flags: -Zmir-opt-level=0
2 // run-pass
3
4 #![feature(const_float_bits_conv)]
5 #![feature(const_float_classify)]
6 #![allow(unused_macro_rules)]
7
8 // Don't promote
9 const fn nop<T>(x: T) -> T { x }
10
11 macro_rules! const_assert {
12     ($a:expr) => {
13         {
14             const _: () = assert!($a);
15             assert!(nop($a));
16         }
17     };
18     ($a:expr, $b:expr) => {
19         {
20             const _: () = assert!($a == $b);
21             assert_eq!(nop($a), nop($b));
22         }
23     };
24 }
25
26 fn f32() {
27     const_assert!((1f32).to_bits(), 0x3f800000);
28     const_assert!(u32::from_be_bytes(1f32.to_be_bytes()), 0x3f800000);
29     const_assert!((12.5f32).to_bits(), 0x41480000);
30     const_assert!(u32::from_le_bytes(12.5f32.to_le_bytes()), 0x41480000);
31     const_assert!((1337f32).to_bits(), 0x44a72000);
32     const_assert!(u32::from_ne_bytes(1337f32.to_ne_bytes()), 0x44a72000);
33     const_assert!((-14.25f32).to_bits(), 0xc1640000);
34     const_assert!(f32::from_bits(0x3f800000), 1.0);
35     const_assert!(f32::from_be_bytes(0x3f800000u32.to_be_bytes()), 1.0);
36     const_assert!(f32::from_bits(0x41480000), 12.5);
37     const_assert!(f32::from_le_bytes(0x41480000u32.to_le_bytes()), 12.5);
38     const_assert!(f32::from_bits(0x44a72000), 1337.0);
39     const_assert!(f32::from_ne_bytes(0x44a72000u32.to_ne_bytes()), 1337.0);
40     const_assert!(f32::from_bits(0xc1640000), -14.25);
41 }
42
43 fn f64() {
44     const_assert!((1f64).to_bits(), 0x3ff0000000000000);
45     const_assert!(u64::from_be_bytes(1f64.to_be_bytes()), 0x3ff0000000000000);
46     const_assert!((12.5f64).to_bits(), 0x4029000000000000);
47     const_assert!(u64::from_le_bytes(12.5f64.to_le_bytes()), 0x4029000000000000);
48     const_assert!((1337f64).to_bits(), 0x4094e40000000000);
49     const_assert!(u64::from_ne_bytes(1337f64.to_ne_bytes()), 0x4094e40000000000);
50     const_assert!((-14.25f64).to_bits(), 0xc02c800000000000);
51     const_assert!(f64::from_bits(0x3ff0000000000000), 1.0);
52     const_assert!(f64::from_be_bytes(0x3ff0000000000000u64.to_be_bytes()), 1.0);
53     const_assert!(f64::from_bits(0x4029000000000000), 12.5);
54     const_assert!(f64::from_le_bytes(0x4029000000000000u64.to_le_bytes()), 12.5);
55     const_assert!(f64::from_bits(0x4094e40000000000), 1337.0);
56     const_assert!(f64::from_ne_bytes(0x4094e40000000000u64.to_ne_bytes()), 1337.0);
57     const_assert!(f64::from_bits(0xc02c800000000000), -14.25);
58 }
59
60 fn main() {
61     f32();
62     f64();
63 }