ff0d44e45a
Add lint to detect floating point operations that can be computed more accurately at the cost of performance. `cbrt`, `ln_1p` and `exp_m1` library functions call their equivalent cmath implementations which is slower but more accurate so moving checks for these under this new lint.
43 lines
1.2 KiB
Rust
43 lines
1.2 KiB
Rust
// run-rustfix
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#![warn(clippy::suboptimal_flops, clippy::imprecise_flops)]
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fn main() {
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let x = 3f32;
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let _ = 2f32.powf(x);
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let _ = 2f32.powf(3.1);
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let _ = 2f32.powf(-3.1);
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let _ = std::f32::consts::E.powf(x);
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let _ = std::f32::consts::E.powf(3.1);
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let _ = std::f32::consts::E.powf(-3.1);
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let _ = x.powf(1.0 / 2.0);
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let _ = x.powf(1.0 / 3.0);
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let _ = x.powf(2.0);
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let _ = x.powf(-2.0);
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let _ = x.powf(16_777_215.0);
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let _ = x.powf(-16_777_215.0);
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// Cases where the lint shouldn't be applied
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let _ = x.powf(2.1);
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let _ = x.powf(-2.1);
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let _ = x.powf(16_777_216.0);
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let _ = x.powf(-16_777_216.0);
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let x = 3f64;
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let _ = 2f64.powf(x);
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let _ = 2f64.powf(3.1);
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let _ = 2f64.powf(-3.1);
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let _ = std::f64::consts::E.powf(x);
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let _ = std::f64::consts::E.powf(3.1);
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let _ = std::f64::consts::E.powf(-3.1);
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let _ = x.powf(1.0 / 2.0);
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let _ = x.powf(1.0 / 3.0);
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let _ = x.powf(2.0);
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let _ = x.powf(-2.0);
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let _ = x.powf(-2_147_483_648.0);
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let _ = x.powf(2_147_483_647.0);
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// Cases where the lint shouldn't be applied
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let _ = x.powf(2.1);
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let _ = x.powf(-2.1);
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let _ = x.powf(-2_147_483_649.0);
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let _ = x.powf(2_147_483_648.0);
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}
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