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Parse infinity correctly

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FliegendeWurst 2020-05-19 09:56:08 +02:00
parent 9b835a7ebe
commit d0edb4db77
1 changed files with 3 additions and 1 deletions
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4
src/main.rs
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@ -49,7 +49,7 @@ fn interpret_single(float: u32) -> f32 {
if mantissa != 0 { if mantissa != 0 {
return f32::NAN; return f32::NAN;
} else { } else {
return sign * f32::INFINITY; return f32::INFINITY.copysign(sign);
} }
} }
@ -72,6 +72,8 @@ fn interpret_single_test() {
(0b1011_1111_0101_0000_0000_0000_0000_0000, -0.8125), (0b1011_1111_0101_0000_0000_0000_0000_0000, -0.8125),
// denormalized float // denormalized float
(0b0000_0000_0100_0000_0000_0000_0000_0000, 0.000000000000000000000000000000000000005877472), (0b0000_0000_0100_0000_0000_0000_0000_0000, 0.000000000000000000000000000000000000005877472),
// positive infinity
(0b0_1111_1111_00000000000000000000000, f32::INFINITY),
]; ];
// some sanity checks around subnormals // some sanity checks around subnormals
assert_eq!(2.0f32.powi(-127), tests[2].1); assert_eq!(2.0f32.powi(-127), tests[2].1);