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also do some float-to-float cast testing

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This commit is contained in:
Ralf Jung 2020-03-28 09:10:34 +01:00
parent a97ce8d94b
commit 032d9aa7d5
1 changed files with 10 additions and 2 deletions
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12
tests/run-pass/floats.rs
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@ -17,7 +17,7 @@ fn main() {
let y: f32 = unsafe { std::mem::transmute(x) };
assert_eq!(y, 42.0_f32);
// f32 casts
// f32-to-int casts
assert_eq!(5.0f32 as u32, 5);
assert_eq!(-5.0f32 as u32, 0);
assert_eq!(5.0f32 as i32, 5);
@ -36,7 +36,7 @@ fn main() {
assert_eq!((u32::MAX-127) as f32 as u32, u32::MAX); // rounding loss
assert_eq!((u32::MAX-128) as f32 as u32, u32::MAX-255); // rounding loss
// f64 casts
// f64-to-int casts
assert_eq!(5.0f64 as u64, 5);
assert_eq!(-5.0f64 as u64, 0);
assert_eq!(5.0f64 as i64, 5);
@ -55,6 +55,14 @@ fn main() {
assert_eq!((u64::MAX-1023) as f64 as u64, u64::MAX); // rounding loss
assert_eq!((u64::MAX-1024) as f64 as u64, u64::MAX-2047); // rounding loss
// f32 <-> f64 casts
assert_eq!(5.0f64 as f32, 5.0f32);
assert_eq!(5.0f32 as f64, 5.0f64);
assert_eq!(std::f64::MAX as f32, std::f32::INFINITY);
assert_eq!(std::f64::MIN as f32, std::f32::NEG_INFINITY);
assert_eq!(std::f32::INFINITY as f64, std::f64::INFINITY);
assert_eq!(std::f32::NEG_INFINITY as f64, std::f64::NEG_INFINITY);
// f32 min/max
assert_eq!((1.0 as f32).max(-1.0), 1.0);
assert_eq!((1.0 as f32).min(-1.0), -1.0);