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Currently, all inputs are generated and then cached. This works reasonably well but it isn't very configurable or extensible (adding `f16` and `f128` is awkward). Replace this with a trait for generating random sequences of tuples. This also removes possible storage limitations of caching all inputs.
54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
//! Compare our implementations with the result of musl functions, as provided by `musl-math-sys`.
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//!
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//! Currently this only tests randomized inputs. In the future this may be improved to test edge
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//! cases or run exhaustive tests.
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//!
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//! Note that musl functions do not always provide 0.5ULP rounding, so our functions can do better
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//! than these results.
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// There are some targets we can't build musl for
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#![cfg(feature = "build-musl")]
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use libm_test::gen::random;
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use libm_test::gen::random::RandomInput;
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use libm_test::{CheckBasis, CheckCtx, CheckOutput, MathOp, TupleCall};
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macro_rules! musl_rand_tests {
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(
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fn_name: $fn_name:ident,
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attrs: [$($attr:meta),*],
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) => {
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paste::paste! {
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#[test]
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$(#[$attr])*
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fn [< musl_random_ $fn_name >]() {
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test_one_random::<libm_test::op::$fn_name::Routine>(musl_math_sys::$fn_name);
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}
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}
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};
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}
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fn test_one_random<Op>(musl_fn: Op::CFn)
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where
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Op: MathOp,
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Op::RustArgs: RandomInput,
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{
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let ctx = CheckCtx::new(Op::IDENTIFIER, CheckBasis::Musl);
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let cases = random::get_test_cases::<Op::RustArgs>(&ctx);
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for input in cases {
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let musl_res = input.call(musl_fn);
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let crate_res = input.call(Op::ROUTINE);
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crate_res.validate(musl_res, input, &ctx).unwrap();
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}
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}
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libm_macros::for_each_function! {
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callback: musl_rand_tests,
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attributes: [
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#[cfg_attr(x86_no_sse, ignore)] // FIXME(correctness): wrong result on i586
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[exp10, exp10f, exp2, exp2f, rint]
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],
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}
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