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b47d3cc2f8
Change `SIGNIFICAND_*` to `SIG_*` and `EXPONENT_*` to `EXP_*`. This makes things more consistent with `libm`, and terseness is convenient here since there isn't anything to confuse.
73 lines
2.6 KiB
Rust
73 lines
2.6 KiB
Rust
#![allow(unused_macros)]
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#![cfg_attr(f128_enabled, feature(f128))]
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#![cfg(not(all(target_arch = "x86", not(target_feature = "sse"))))]
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use testcrate::*;
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// This is approximate because of issues related to
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// https://github.com/rust-lang/rust/issues/73920.
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// TODO how do we resolve this indeterminacy?
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macro_rules! pow {
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($($f:ty, $tolerance:expr, $fn:ident, $sys_available:meta);*;) => {
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$(
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#[test]
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// FIXME(apfloat): We skip tests if system symbols aren't available rather
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// than providing a fallback, since `rustc_apfloat` does not provide `pow`.
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#[cfg($sys_available)]
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fn $fn() {
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use compiler_builtins::float::pow::$fn;
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use compiler_builtins::float::Float;
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fuzz_float_2(N, |x: $f, y: $f| {
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if !(Float::is_subnormal(x) || Float::is_subnormal(y) || x.is_nan()) {
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let n = y.to_bits() & !<$f as Float>::SIG_MASK;
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let n = (n as <$f as Float>::SignedInt) >> <$f as Float>::SIG_BITS;
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let n = n as i32;
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let tmp0: $f = x.powi(n);
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let tmp1: $f = $fn(x, n);
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let (a, b) = if tmp0 < tmp1 {
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(tmp0, tmp1)
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} else {
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(tmp1, tmp0)
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};
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let good = if a == b {
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// handles infinity equality
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true
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} else if a < $tolerance {
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b < $tolerance
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} else {
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let quo = b / a;
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(quo < (1. + $tolerance)) && (quo > (1. - $tolerance))
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};
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assert!(
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good,
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"{}({:?}, {:?}): std: {:?}, builtins: {:?}",
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stringify!($fn), x, n, tmp0, tmp1
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);
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}
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});
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}
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)*
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};
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}
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pow! {
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f32, 1e-4, __powisf2, all();
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f64, 1e-12, __powidf2, all();
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}
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#[cfg(f128_enabled)]
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// FIXME(f16_f128): MSVC cannot build these until `__divtf3` is available in nightly.
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#[cfg(not(target_env = "msvc"))]
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#[cfg(not(any(target_arch = "powerpc", target_arch = "powerpc64")))]
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pow! {
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f128, 1e-36, __powitf2, not(feature = "no-sys-f128");
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}
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#[cfg(f128_enabled)]
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#[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
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pow! {
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f128, 1e-36, __powikf2, not(feature = "no-sys-f128");
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}
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