Move float tests from std to core where applicable

A lot of float functionality lives in `core` but only gets tested in
`std`. Split tests between `std` and `core` to reflect this and ensure
as much as possible also can also get tested on no-std targets.

Author: tgross35

library/coretests/build.rs

@@ -0,0 +1,8 @@
+mod build_shared {
+    include!("../std/build_shared.rs");
+}
+
+fn main() {
+    let cfg = build_shared::Config::from_env();
+    build_shared::configure_f16_f128(&cfg);
+}

library/coretests/tests/floats/f128.rs

@@ -460,7 +460,7 @@ fn test_mul_add() {
 }
 
 #[test]
-#[cfg(reliable_f16_math)]
+#[cfg(reliable_f128_math)]
 fn test_recip() {
     let nan: f128 = f128::NAN;
     let inf: f128 = f128::INFINITY;
@@ -479,8 +479,6 @@ fn test_recip() {
     assert_eq!(neg_inf.recip(), 0.0);
 }
 
-// Many math functions allow for less accurate results, so the next tolerance up is used
-
 #[test]
 #[cfg(reliable_f128_math)]
 fn test_powi() {
@@ -496,23 +494,6 @@ fn test_powi() {
     assert_eq!(neg_inf.powi(2), inf);
 }
 
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_powf() {
-    let nan: f128 = f128::NAN;
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    assert_eq!(1.0f128.powf(1.0), 1.0);
-    assert_approx_eq!(3.4f128.powf(4.5), 246.40818323761892815995637964326426756, TOL_IMPR);
-    assert_approx_eq!(2.7f128.powf(-3.2), 0.041652009108526178281070304373500889273, TOL_IMPR);
-    assert_approx_eq!((-3.1f128).powf(2.0), 9.6100000000000005506706202140776519387, TOL_IMPR);
-    assert_approx_eq!(5.9f128.powf(-2.0), 0.028727377190462507313100483690639638451, TOL_IMPR);
-    assert_eq!(8.3f128.powf(0.0), 1.0);
-    assert!(nan.powf(2.0).is_nan());
-    assert_eq!(inf.powf(2.0), inf);
-    assert_eq!(neg_inf.powf(3.0), neg_inf);
-}
-
 #[test]
 #[cfg(reliable_f128_math)]
 fn test_sqrt_domain() {
@@ -525,105 +506,6 @@ fn test_sqrt_domain() {
     assert_eq!(f128::INFINITY.sqrt(), f128::INFINITY);
 }
 
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_exp() {
-    assert_eq!(1.0, 0.0f128.exp());
-    assert_approx_eq!(consts::E, 1.0f128.exp(), TOL);
-    assert_approx_eq!(148.41315910257660342111558004055227962348775, 5.0f128.exp(), TOL);
-
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    let nan: f128 = f128::NAN;
-    assert_eq!(inf, inf.exp());
-    assert_eq!(0.0, neg_inf.exp());
-    assert!(nan.exp().is_nan());
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_exp2() {
-    assert_eq!(32.0, 5.0f128.exp2());
-    assert_eq!(1.0, 0.0f128.exp2());
-
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    let nan: f128 = f128::NAN;
-    assert_eq!(inf, inf.exp2());
-    assert_eq!(0.0, neg_inf.exp2());
-    assert!(nan.exp2().is_nan());
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_ln() {
-    let nan: f128 = f128::NAN;
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    assert_approx_eq!(1.0f128.exp().ln(), 1.0, TOL);
-    assert!(nan.ln().is_nan());
-    assert_eq!(inf.ln(), inf);
-    assert!(neg_inf.ln().is_nan());
-    assert!((-2.3f128).ln().is_nan());
-    assert_eq!((-0.0f128).ln(), neg_inf);
-    assert_eq!(0.0f128.ln(), neg_inf);
-    assert_approx_eq!(4.0f128.ln(), 1.3862943611198906188344642429163531366, TOL);
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_log() {
-    let nan: f128 = f128::NAN;
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    assert_eq!(10.0f128.log(10.0), 1.0);
-    assert_approx_eq!(2.3f128.log(3.5), 0.66485771361478710036766645911922010272, TOL);
-    assert_eq!(1.0f128.exp().log(1.0f128.exp()), 1.0);
-    assert!(1.0f128.log(1.0).is_nan());
-    assert!(1.0f128.log(-13.9).is_nan());
-    assert!(nan.log(2.3).is_nan());
-    assert_eq!(inf.log(10.0), inf);
-    assert!(neg_inf.log(8.8).is_nan());
-    assert!((-2.3f128).log(0.1).is_nan());
-    assert_eq!((-0.0f128).log(2.0), neg_inf);
-    assert_eq!(0.0f128.log(7.0), neg_inf);
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_log2() {
-    let nan: f128 = f128::NAN;
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    assert_approx_eq!(10.0f128.log2(), 3.32192809488736234787031942948939017, TOL);
-    assert_approx_eq!(2.3f128.log2(), 1.2016338611696504130002982471978765921, TOL);
-    assert_approx_eq!(1.0f128.exp().log2(), 1.4426950408889634073599246810018921381, TOL);
-    assert!(nan.log2().is_nan());
-    assert_eq!(inf.log2(), inf);
-    assert!(neg_inf.log2().is_nan());
-    assert!((-2.3f128).log2().is_nan());
-    assert_eq!((-0.0f128).log2(), neg_inf);
-    assert_eq!(0.0f128.log2(), neg_inf);
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_log10() {
-    let nan: f128 = f128::NAN;
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    assert_eq!(10.0f128.log10(), 1.0);
-    assert_approx_eq!(2.3f128.log10(), 0.36172783601759284532595218865859309898, TOL);
-    assert_approx_eq!(1.0f128.exp().log10(), 0.43429448190325182765112891891660508222, TOL);
-    assert_eq!(1.0f128.log10(), 0.0);
-    assert!(nan.log10().is_nan());
-    assert_eq!(inf.log10(), inf);
-    assert!(neg_inf.log10().is_nan());
-    assert!((-2.3f128).log10().is_nan());
-    assert_eq!((-0.0f128).log10(), neg_inf);
-    assert_eq!(0.0f128.log10(), neg_inf);
-}
-
 #[test]
 fn test_to_degrees() {
     let pi: f128 = consts::PI;
@@ -656,150 +538,6 @@ fn test_to_radians() {
     assert_eq!(neg_inf.to_radians(), neg_inf);
 }
 
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_asinh() {
-    // Lower accuracy results are allowed, use increased tolerances
-    assert_eq!(0.0f128.asinh(), 0.0f128);
-    assert_eq!((-0.0f128).asinh(), -0.0f128);
-
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    let nan: f128 = f128::NAN;
-    assert_eq!(inf.asinh(), inf);
-    assert_eq!(neg_inf.asinh(), neg_inf);
-    assert!(nan.asinh().is_nan());
-    assert!((-0.0f128).asinh().is_sign_negative());
-
-    // issue 63271
-    assert_approx_eq!(2.0f128.asinh(), 1.443635475178810342493276740273105f128, TOL_IMPR);
-    assert_approx_eq!((-2.0f128).asinh(), -1.443635475178810342493276740273105f128, TOL_IMPR);
-    // regression test for the catastrophic cancellation fixed in 72486
-    assert_approx_eq!(
-        (-67452098.07139316f128).asinh(),
-        -18.720075426274544393985484294000831757220,
-        TOL_IMPR
-    );
-
-    // test for low accuracy from issue 104548
-    assert_approx_eq!(60.0f128, 60.0f128.sinh().asinh(), TOL_IMPR);
-    // mul needed for approximate comparison to be meaningful
-    assert_approx_eq!(1.0f128, 1e-15f128.sinh().asinh() * 1e15f128, TOL_IMPR);
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_acosh() {
-    assert_eq!(1.0f128.acosh(), 0.0f128);
-    assert!(0.999f128.acosh().is_nan());
-
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    let nan: f128 = f128::NAN;
-    assert_eq!(inf.acosh(), inf);
-    assert!(neg_inf.acosh().is_nan());
-    assert!(nan.acosh().is_nan());
-    assert_approx_eq!(2.0f128.acosh(), 1.31695789692481670862504634730796844f128, TOL_IMPR);
-    assert_approx_eq!(3.0f128.acosh(), 1.76274717403908605046521864995958461f128, TOL_IMPR);
-
-    // test for low accuracy from issue 104548
-    assert_approx_eq!(60.0f128, 60.0f128.cosh().acosh(), TOL_IMPR);
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_atanh() {
-    assert_eq!(0.0f128.atanh(), 0.0f128);
-    assert_eq!((-0.0f128).atanh(), -0.0f128);
-
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    let nan: f128 = f128::NAN;
-    assert_eq!(1.0f128.atanh(), inf);
-    assert_eq!((-1.0f128).atanh(), neg_inf);
-    assert!(2f128.atanh().atanh().is_nan());
-    assert!((-2f128).atanh().atanh().is_nan());
-    assert!(inf.atanh().is_nan());
-    assert!(neg_inf.atanh().is_nan());
-    assert!(nan.atanh().is_nan());
-    assert_approx_eq!(0.5f128.atanh(), 0.54930614433405484569762261846126285f128, TOL_IMPR);
-    assert_approx_eq!((-0.5f128).atanh(), -0.54930614433405484569762261846126285f128, TOL_IMPR);
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_gamma() {
-    // precision can differ among platforms
-    assert_approx_eq!(1.0f128.gamma(), 1.0f128, TOL_IMPR);
-    assert_approx_eq!(2.0f128.gamma(), 1.0f128, TOL_IMPR);
-    assert_approx_eq!(3.0f128.gamma(), 2.0f128, TOL_IMPR);
-    assert_approx_eq!(4.0f128.gamma(), 6.0f128, TOL_IMPR);
-    assert_approx_eq!(5.0f128.gamma(), 24.0f128, TOL_IMPR);
-    assert_approx_eq!(0.5f128.gamma(), consts::PI.sqrt(), TOL_IMPR);
-    assert_approx_eq!((-0.5f128).gamma(), -2.0 * consts::PI.sqrt(), TOL_IMPR);
-    assert_eq!(0.0f128.gamma(), f128::INFINITY);
-    assert_eq!((-0.0f128).gamma(), f128::NEG_INFINITY);
-    assert!((-1.0f128).gamma().is_nan());
-    assert!((-2.0f128).gamma().is_nan());
-    assert!(f128::NAN.gamma().is_nan());
-    assert!(f128::NEG_INFINITY.gamma().is_nan());
-    assert_eq!(f128::INFINITY.gamma(), f128::INFINITY);
-    assert_eq!(1760.9f128.gamma(), f128::INFINITY);
-}
-
-#[test]
-#[cfg(reliable_f128_math)]
-fn test_ln_gamma() {
-    assert_approx_eq!(1.0f128.ln_gamma().0, 0.0f128, TOL_IMPR);
-    assert_eq!(1.0f128.ln_gamma().1, 1);
-    assert_approx_eq!(2.0f128.ln_gamma().0, 0.0f128, TOL_IMPR);
-    assert_eq!(2.0f128.ln_gamma().1, 1);
-    assert_approx_eq!(3.0f128.ln_gamma().0, 2.0f128.ln(), TOL_IMPR);
-    assert_eq!(3.0f128.ln_gamma().1, 1);
-    assert_approx_eq!((-0.5f128).ln_gamma().0, (2.0 * consts::PI.sqrt()).ln(), TOL_IMPR);
-    assert_eq!((-0.5f128).ln_gamma().1, -1);
-}
-
-#[test]
-fn test_real_consts() {
-    let pi: f128 = consts::PI;
-    let frac_pi_2: f128 = consts::FRAC_PI_2;
-    let frac_pi_3: f128 = consts::FRAC_PI_3;
-    let frac_pi_4: f128 = consts::FRAC_PI_4;
-    let frac_pi_6: f128 = consts::FRAC_PI_6;
-    let frac_pi_8: f128 = consts::FRAC_PI_8;
-    let frac_1_pi: f128 = consts::FRAC_1_PI;
-    let frac_2_pi: f128 = consts::FRAC_2_PI;
-
-    assert_approx_eq!(frac_pi_2, pi / 2f128, TOL_PRECISE);
-    assert_approx_eq!(frac_pi_3, pi / 3f128, TOL_PRECISE);
-    assert_approx_eq!(frac_pi_4, pi / 4f128, TOL_PRECISE);
-    assert_approx_eq!(frac_pi_6, pi / 6f128, TOL_PRECISE);
-    assert_approx_eq!(frac_pi_8, pi / 8f128, TOL_PRECISE);
-    assert_approx_eq!(frac_1_pi, 1f128 / pi, TOL_PRECISE);
-    assert_approx_eq!(frac_2_pi, 2f128 / pi, TOL_PRECISE);
-
-    #[cfg(reliable_f128_math)]
-    {
-        let frac_2_sqrtpi: f128 = consts::FRAC_2_SQRT_PI;
-        let sqrt2: f128 = consts::SQRT_2;
-        let frac_1_sqrt2: f128 = consts::FRAC_1_SQRT_2;
-        let e: f128 = consts::E;
-        let log2_e: f128 = consts::LOG2_E;
-        let log10_e: f128 = consts::LOG10_E;
-        let ln_2: f128 = consts::LN_2;
-        let ln_10: f128 = consts::LN_10;
-
-        assert_approx_eq!(frac_2_sqrtpi, 2f128 / pi.sqrt(), TOL_PRECISE);
-        assert_approx_eq!(sqrt2, 2f128.sqrt(), TOL_PRECISE);
-        assert_approx_eq!(frac_1_sqrt2, 1f128 / 2f128.sqrt(), TOL_PRECISE);
-        assert_approx_eq!(log2_e, e.log2(), TOL_PRECISE);
-        assert_approx_eq!(log10_e, e.log10(), TOL_PRECISE);
-        assert_approx_eq!(ln_2, 2f128.ln(), TOL_PRECISE);
-        assert_approx_eq!(ln_10, 10f128.ln(), TOL_PRECISE);
-    }
-}
-
 #[test]
 fn test_float_bits_conv() {
     assert_eq!((1f128).to_bits(), 0x3fff0000000000000000000000000000);