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Add llvm cg tests for f16
Add f128 tests, both codegen tests passing Add more to codegen tests Fix intrinsics and add tests for them Get a lot more f16 and f128 tests passing Update a few more f128 tests Disable rust vs ieee parse checking
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8 files changed

+473
-105
lines changed

8 files changed

+473
-105
lines changed

‎compiler/rustc_codegen_llvm/src/context.rs

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -727,12 +727,12 @@ impl<'ll> CodegenCx<'ll, '_> {
727727
ifn!("llvm.debugtrap", fn() -> void);
728728
ifn!("llvm.frameaddress", fn(t_i32) -> ptr);
729729

730-
ifn!("llvm.powi.f16", fn(t_f32, t_i32) -> t_f16);
730+
ifn!("llvm.powi.f16", fn(t_f16, t_i32) -> t_f16);
731731
ifn!("llvm.powi.f32", fn(t_f32, t_i32) -> t_f32);
732732
ifn!("llvm.powi.f64", fn(t_f64, t_i32) -> t_f64);
733733
ifn!("llvm.powi.f128", fn(t_f128, t_i32) -> t_f128);
734734

735-
ifn!("llvm.pow.f16", fn(t_f32, t_f16) -> t_f16);
735+
ifn!("llvm.pow.f16", fn(t_f16, t_f16) -> t_f16);
736736
ifn!("llvm.pow.f32", fn(t_f32, t_f32) -> t_f32);
737737
ifn!("llvm.pow.f64", fn(t_f64, t_f64) -> t_f64);
738738
ifn!("llvm.pow.f128", fn(t_f128, t_f128) -> t_f128);
@@ -777,7 +777,7 @@ impl<'ll> CodegenCx<'ll, '_> {
777777
ifn!("llvm.log2.f64", fn(t_f64) -> t_f64);
778778
ifn!("llvm.log2.f128", fn(t_f128) -> t_f128);
779779

780-
ifn!("llvm.fma.f16", fn(t_f32, t_f32, t_f32) -> t_f32);
780+
ifn!("llvm.fma.f16", fn(t_f16, t_f16, t_f16) -> t_f16);
781781
ifn!("llvm.fma.f32", fn(t_f32, t_f32, t_f32) -> t_f32);
782782
ifn!("llvm.fma.f64", fn(t_f64, t_f64, t_f64) -> t_f64);
783783
ifn!("llvm.fma.f128", fn(t_f128, t_f128, t_f128) -> t_f128);

‎compiler/rustc_codegen_llvm/src/intrinsic.rs

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -107,7 +107,7 @@ fn get_simple_intrinsic<'ll>(
107107
sym::nearbyintf16 => "llvm.nearbyint.f16",
108108
sym::nearbyintf32 => "llvm.nearbyint.f32",
109109
sym::nearbyintf64 => "llvm.nearbyint.f64",
110-
sym::nearbyintf128 => "llvm.nearbyint.128",
110+
sym::nearbyintf128 => "llvm.nearbyint.f128",
111111
sym::roundf16 => "llvm.round.f16",
112112
sym::roundf32 => "llvm.round.f32",
113113
sym::roundf64 => "llvm.round.f64",

‎compiler/rustc_mir_build/src/build/mod.rs

Lines changed: 12 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -989,17 +989,18 @@ fn parse_check_f16(_num: &str, _f: Half) -> Option<()> {
989989
}
990990

991991
#[cfg(not(bootstrap))]
992-
fn parse_check_f128(num: &str, f: Quad) -> Option<()> {
993-
let Ok(rust_f) = num.parse::<f128>() else { return None };
994-
995-
assert!(
996-
u128::from(rust_f.to_bits()) == f.to_bits(),
997-
"apfloat::ieee::Quad gave a different result for `{num}`: \
998-
{f} ({:#x}) vs Rust's {} ({:#x})",
999-
f.to_bits(),
1000-
Quad::from_bits(rust_f.to_bits().into()),
1001-
rust_f.to_bits()
1002-
);
992+
fn parse_check_f128(_num: &str, _f: Quad) -> Option<()> {
993+
// TODO: reenable this once our f128 FromStr doesn't just use f64
994+
// let Ok(rust_f) = num.parse::<f128>() else { return None };
995+
996+
// assert!(
997+
// u128::from(rust_f.to_bits()) == f.to_bits(),
998+
// "apfloat::ieee::Quad gave a different result for `{num}`: \
999+
// {f} ({:#x}) vs Rust's {} ({:#x})",
1000+
// f.to_bits(),
1001+
// Quad::from_bits(rust_f.to_bits().into()),
1002+
// rust_f.to_bits()
1003+
// );
10031004

10041005
Some(())
10051006
}

‎library/core/src/num/f128.rs

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -127,15 +127,15 @@ impl f128 {
127127

128128
/// Smallest finite `f128` value.
129129
#[unstable(feature = "f128", issue = "none")]
130-
pub const MIN: f128 = -1.18973e+4932_f128;
130+
pub const MIN: f128 = 1.1897314953572317650857593266280070162e+4932_f128;
131131

132132
/// Smallest positive normal `f128` value.
133133
#[unstable(feature = "f128", issue = "none")]
134134
pub const MIN_POSITIVE: f128 = 1.94652e-4855_f128;
135135

136136
/// Largest finite `f128` value.
137137
#[unstable(feature = "f128", issue = "none")]
138-
pub const MAX: f128 = 1.18973e+4932_f128;
138+
pub const MAX: f128 = 1.1897314953572317650857593266280070162e+4932_f128;
139139

140140
/// One greater than the minimum possible normal power of 2 exponent.
141141
#[unstable(feature = "f128", issue = "none")]

‎library/std/src/tests/f128_tests.rs

Lines changed: 6 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -158,8 +158,8 @@ fn test_is_normal() {
158158
assert!(!zero.is_normal());
159159
assert!(!neg_zero.is_normal());
160160
assert!(1f128.is_normal());
161-
assert!(1e-37f128.is_normal());
162-
assert!(!1e-38f128.is_normal());
161+
assert!(1e-4931_f128.is_normal());
162+
assert!(!1e-4932_f128.is_normal());
163163
}
164164

165165
#[test]
@@ -175,8 +175,8 @@ fn test_classify() {
175175
assert_eq!(zero.classify(), Fp::Zero);
176176
assert_eq!(neg_zero.classify(), Fp::Zero);
177177
assert_eq!(1f128.classify(), Fp::Normal);
178-
assert_eq!(1e-37f128.classify(), Fp::Normal);
179-
assert_eq!(1e-38f128.classify(), Fp::Subnormal);
178+
assert_eq!(1e-4931_f128.classify(), Fp::Normal);
179+
assert_eq!(1e-4932_f128.classify(), Fp::Subnormal);
180180
}
181181

182182
#[test]
@@ -499,6 +499,7 @@ fn test_ln() {
499499
assert_approx_eq!(1.0f128.exp().ln(), 1.0);
500500
assert!(nan.ln().is_nan());
501501
assert_eq!(inf.ln(), inf);
502+
dbg!(neg_inf.ln(), neg_inf.ln().to_bits());
502503
assert!(neg_inf.ln().is_nan());
503504
assert!((-2.3f128).ln().is_nan());
504505
assert_eq!((-0.0f128).ln(), neg_inf);
@@ -581,6 +582,7 @@ fn test_to_radians() {
581582
assert_eq!(0.0f128.to_radians(), 0.0);
582583
assert_approx_eq!(154.6f128.to_radians(), 2.698279);
583584
assert_approx_eq!((-332.31f128).to_radians(), -5.799903);
585+
dbg!(180.0f128.to_radians().to_bits(), pi.to_bits());
584586
assert_eq!(180.0f128.to_radians(), pi);
585587
assert!(nan.to_radians().is_nan());
586588
assert_eq!(inf.to_radians(), inf);

‎library/std/src/tests/f16_tests.rs

Lines changed: 74 additions & 84 deletions
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,11 @@ use crate::f16::consts;
22
use crate::num::FpCategory as Fp;
33
use crate::num::*;
44

5-
const F16_APPROX: f16 = 0.001;
5+
// We run out of precision pretty quickly with f16
6+
const F16_APPROX_L1: f16 = 0.001;
7+
const F16_APPROX_L2: f16 = 0.01;
8+
const F16_APPROX_L3: f16 = 0.1;
9+
const F16_APPROX_L4: f16 = 0.5;
610

711
#[test]
812
fn test_num_f16() {
@@ -160,8 +164,8 @@ fn test_is_normal() {
160164
assert!(!zero.is_normal());
161165
assert!(!neg_zero.is_normal());
162166
assert!(1f16.is_normal());
163-
assert!(1e-37f16.is_normal());
164-
assert!(!1e-38f16.is_normal());
167+
assert!(1e-4f16.is_normal());
168+
assert!(!1e-5f16.is_normal());
165169
}
166170

167171
#[test]
@@ -177,8 +181,8 @@ fn test_classify() {
177181
assert_eq!(zero.classify(), Fp::Zero);
178182
assert_eq!(neg_zero.classify(), Fp::Zero);
179183
assert_eq!(1f16.classify(), Fp::Normal);
180-
assert_eq!(1e-37f16.classify(), Fp::Normal);
181-
assert_eq!(1e-38f16.classify(), Fp::Subnormal);
184+
assert_eq!(1e-4f16.classify(), Fp::Normal);
185+
assert_eq!(1e-5f16.classify(), Fp::Subnormal);
182186
}
183187

184188
#[test]
@@ -255,16 +259,16 @@ fn test_trunc() {
255259

256260
#[test]
257261
fn test_fract() {
258-
assert_approx_eq!(1.0f16.fract(), 0.0f16, F16_APPROX);
259-
assert_approx_eq!(1.3f16.fract(), 0.3f16, F16_APPROX);
260-
assert_approx_eq!(1.5f16.fract(), 0.5f16, F16_APPROX);
261-
assert_approx_eq!(1.7f16.fract(), 0.7f16, F16_APPROX);
262-
assert_approx_eq!(0.0f16.fract(), 0.0f16, F16_APPROX);
263-
assert_approx_eq!((-0.0f16).fract(), -0.0f16, F16_APPROX);
264-
assert_approx_eq!((-1.0f16).fract(), -0.0f16, F16_APPROX);
265-
assert_approx_eq!((-1.3f16).fract(), -0.3f16, F16_APPROX);
266-
assert_approx_eq!((-1.5f16).fract(), -0.5f16, F16_APPROX);
267-
assert_approx_eq!((-1.7f16).fract(), -0.7f16, F16_APPROX);
262+
assert_approx_eq!(1.0f16.fract(), 0.0f16, F16_APPROX_L1);
263+
assert_approx_eq!(1.3f16.fract(), 0.3f16, F16_APPROX_L1);
264+
assert_approx_eq!(1.5f16.fract(), 0.5f16, F16_APPROX_L1);
265+
assert_approx_eq!(1.7f16.fract(), 0.7f16, F16_APPROX_L1);
266+
assert_approx_eq!(0.0f16.fract(), 0.0f16, F16_APPROX_L1);
267+
assert_approx_eq!((-0.0f16).fract(), -0.0f16, F16_APPROX_L1);
268+
assert_approx_eq!((-1.0f16).fract(), -0.0f16, F16_APPROX_L1);
269+
assert_approx_eq!((-1.3f16).fract(), -0.3f16, F16_APPROX_L1);
270+
assert_approx_eq!((-1.5f16).fract(), -0.5f16, F16_APPROX_L1);
271+
assert_approx_eq!((-1.7f16).fract(), -0.7f16, F16_APPROX_L1);
268272
}
269273

270274
#[test]
@@ -402,10 +406,10 @@ fn test_mul_add() {
402406
let nan: f16 = f16::NAN;
403407
let inf: f16 = f16::INFINITY;
404408
let neg_inf: f16 = f16::NEG_INFINITY;
405-
assert_approx_eq!(12.3f16.mul_add(4.5, 6.7), 62.05, F16_APPROX);
406-
assert_approx_eq!((-12.3f16).mul_add(-4.5, -6.7), 48.65, F16_APPROX);
407-
assert_approx_eq!(0.0f16.mul_add(8.9, 1.2), 1.2, F16_APPROX);
408-
assert_approx_eq!(3.4f16.mul_add(-0.0, 5.6), 5.6, F16_APPROX);
409+
assert_approx_eq!(12.3f16.mul_add(4.5, 6.7), 62.05, F16_APPROX_L3);
410+
assert_approx_eq!((-12.3f16).mul_add(-4.5, -6.7), 48.65, F16_APPROX_L4);
411+
assert_approx_eq!(0.0f16.mul_add(8.9, 1.2), 1.2, F16_APPROX_L2);
412+
assert_approx_eq!(3.4f16.mul_add(-0.0, 5.6), 5.6, F16_APPROX_L2);
409413
assert!(nan.mul_add(7.8, 9.0).is_nan());
410414
assert_eq!(inf.mul_add(7.8, 9.0), inf);
411415
assert_eq!(neg_inf.mul_add(7.8, 9.0), neg_inf);
@@ -427,48 +431,35 @@ fn test_recip() {
427431
assert_eq!(neg_inf.recip(), 0.0);
428432
}
429433

430-
// TODO: powi gives me LLVM errors:
431-
//
432-
// Both operands to a binary operator are not of the same type!
433-
// %10 = fadd float %9, half 0xHC8CE
434-
// Call parameter type does not match function signature!
435-
// %10 = fadd float %9, half 0xHC8CE
436-
// half %11 = tail call half @llvm.fabs.f16(float %10)
437-
// Intrinsic has incorrect argument type!
438-
// ptr @llvm.powi.f16
439-
// in function _ZN3std3f165tests9test_powi17h5053d7d11c8cb05dE
440-
// LLVM ERROR: Broken function found, compilation aborted!
441-
//
442-
// #[test]
443-
// fn test_powi() {
444-
// let nan: f16 = f16::NAN;
445-
// let inf: f16 = f16::INFINITY;
446-
// let neg_inf: f16 = f16::NEG_INFINITY;
447-
// assert_eq!(1.0f16.powi(1), 1.0);
448-
// assert_approx_eq!((-3.1f16).powi(2), 9.61);
449-
// assert_approx_eq!(5.9f16.powi(-2), 0.028727);
450-
// assert_eq!(8.3f16.powi(0), 1.0);
451-
// assert!(nan.powi(2).is_nan());
452-
// assert_eq!(inf.powi(3), inf);
453-
// assert_eq!(neg_inf.powi(2), inf);
454-
// }
434+
#[test]
435+
fn test_powi() {
436+
let nan: f16 = f16::NAN;
437+
let inf: f16 = f16::INFINITY;
438+
let neg_inf: f16 = f16::NEG_INFINITY;
439+
assert_eq!(1.0f16.powi(1), 1.0);
440+
assert_approx_eq!((-3.1f16).powi(2), 9.61);
441+
assert_approx_eq!(5.9f16.powi(-2), 0.028727);
442+
assert_eq!(8.3f16.powi(0), 1.0);
443+
assert!(nan.powi(2).is_nan());
444+
assert_eq!(inf.powi(3), inf);
445+
assert_eq!(neg_inf.powi(2), inf);
446+
}
455447

456-
// TODO: LLVM errors
457-
// #[test]
458-
// fn test_powf() {
459-
// let nan: f16 = f16::NAN;
460-
// let inf: f16 = f16::INFINITY;
461-
// let neg_inf: f16 = f16::NEG_INFINITY;
462-
// assert_eq!(1.0f16.powf(1.0), 1.0);
463-
// assert_approx_eq!(3.4f16.powf(4.5), 246.408218);
464-
// assert_approx_eq!(2.7f16.powf(-3.2), 0.041652);
465-
// assert_approx_eq!((-3.1f16).powf(2.0), 9.61);
466-
// assert_approx_eq!(5.9f16.powf(-2.0), 0.028727);
467-
// assert_eq!(8.3f16.powf(0.0), 1.0);
468-
// assert!(nan.powf(2.0).is_nan());
469-
// assert_eq!(inf.powf(2.0), inf);
470-
// assert_eq!(neg_inf.powf(3.0), neg_inf);
471-
// }
448+
#[test]
449+
fn test_powf() {
450+
let nan: f16 = f16::NAN;
451+
let inf: f16 = f16::INFINITY;
452+
let neg_inf: f16 = f16::NEG_INFINITY;
453+
assert_eq!(1.0f16.powf(1.0), 1.0);
454+
assert_approx_eq!(3.4f16.powf(4.5), 246.408218, F16_APPROX_L4);
455+
assert_approx_eq!(2.7f16.powf(-3.2), 0.041652, F16_APPROX_L1);
456+
assert_approx_eq!((-3.1f16).powf(2.0), 9.61, F16_APPROX_L1);
457+
assert_approx_eq!(5.9f16.powf(-2.0), 0.028727, F16_APPROX_L1);
458+
assert_eq!(8.3f16.powf(0.0), 1.0);
459+
assert!(nan.powf(2.0).is_nan());
460+
assert_eq!(inf.powf(2.0), inf);
461+
assert_eq!(neg_inf.powf(3.0), neg_inf);
462+
}
472463

473464
#[test]
474465
fn test_sqrt_domain() {
@@ -546,9 +537,9 @@ fn test_log2() {
546537
let nan: f16 = f16::NAN;
547538
let inf: f16 = f16::INFINITY;
548539
let neg_inf: f16 = f16::NEG_INFINITY;
549-
assert_approx_eq!(10.0f16.log2(), 3.321928, F16_APPROX);
550-
assert_approx_eq!(2.3f16.log2(), 1.201634, F16_APPROX);
551-
assert_approx_eq!(1.0f16.exp().log2(), 1.442695, F16_APPROX);
540+
assert_approx_eq!(10.0f16.log2(), 3.321928, F16_APPROX_L1);
541+
assert_approx_eq!(2.3f16.log2(), 1.201634, F16_APPROX_L1);
542+
assert_approx_eq!(1.0f16.exp().log2(), 1.442695, F16_APPROX_L1);
552543
assert!(nan.log2().is_nan());
553544
assert_eq!(inf.log2(), inf);
554545
assert!(neg_inf.log2().is_nan());
@@ -581,13 +572,12 @@ fn test_to_degrees() {
581572
let inf: f16 = f16::INFINITY;
582573
let neg_inf: f16 = f16::NEG_INFINITY;
583574
assert_eq!(0.0f16.to_degrees(), 0.0);
584-
// Loss of precision here, increase our bounds
585-
assert_approx_eq!((-5.8f16).to_degrees(), -332.315521, F16_APPROX * 1.1);
575+
assert_approx_eq!((-5.8f16).to_degrees(), -332.315521, F16_APPROX_L4);
586576
assert_eq!(pi.to_degrees(), 180.0);
587577
assert!(nan.to_degrees().is_nan());
588578
assert_eq!(inf.to_degrees(), inf);
589579
assert_eq!(neg_inf.to_degrees(), neg_inf);
590-
assert_eq!(1_f16.to_degrees(), 57.2957795130823208767981548141051703);
580+
assert_approx_eq!(1_f16.to_degrees(), 57.29577951, F16_APPROX_L3);
591581
}
592582

593583
#[test]
@@ -597,15 +587,15 @@ fn test_to_radians() {
597587
let inf: f16 = f16::INFINITY;
598588
let neg_inf: f16 = f16::NEG_INFINITY;
599589
assert_eq!(0.0f16.to_radians(), 0.0);
600-
// Loss of precision here, increase our bounds
601-
assert_approx_eq!(154.6f16.to_radians(), 2.698279, F16_APPROX * 1.1);
602-
assert_approx_eq!((-332.31f16).to_radians(), -5.799903, F16_APPROX);
603-
assert_eq!(180.0f16.to_radians(), pi);
590+
assert_approx_eq!(154.6f16.to_radians(), 2.698279, F16_APPROX_L3);
591+
assert_approx_eq!((-332.31f16).to_radians(), -5.799903, F16_APPROX_L3);
592+
assert_approx_eq!(180.0f16.to_radians(), pi, F16_APPROX_L3);
604593
assert!(nan.to_radians().is_nan());
605594
assert_eq!(inf.to_radians(), inf);
606595
assert_eq!(neg_inf.to_radians(), neg_inf);
607596
}
608597

598+
// Disabled since this relies on cmath
609599
// #[test]
610600
// fn test_asinh() {
611601
// assert_eq!(0.0f16.asinh(), 0.0f16);
@@ -724,20 +714,20 @@ fn test_real_consts() {
724714
let ln_2: f16 = consts::LN_2;
725715
let ln_10: f16 = consts::LN_10;
726716

727-
assert_approx_eq!(frac_pi_2, pi / 2f16, F16_APPROX);
728-
assert_approx_eq!(frac_pi_3, pi / 3f16, F16_APPROX);
729-
assert_approx_eq!(frac_pi_4, pi / 4f16, F16_APPROX);
730-
assert_approx_eq!(frac_pi_6, pi / 6f16, F16_APPROX);
731-
assert_approx_eq!(frac_pi_8, pi / 8f16, F16_APPROX);
732-
assert_approx_eq!(frac_1_pi, 1f16 / pi, F16_APPROX);
733-
assert_approx_eq!(frac_2_pi, 2f16 / pi, F16_APPROX);
734-
assert_approx_eq!(frac_2_sqrtpi, 2f16 / pi.sqrt(), F16_APPROX);
735-
assert_approx_eq!(sqrt2, 2f16.sqrt(), F16_APPROX);
736-
assert_approx_eq!(frac_1_sqrt2, 1f16 / 2f16.sqrt(), F16_APPROX);
737-
assert_approx_eq!(log2_e, e.log2(), F16_APPROX);
738-
assert_approx_eq!(log10_e, e.log10(), F16_APPROX);
739-
assert_approx_eq!(ln_2, 2f16.ln(), F16_APPROX);
740-
assert_approx_eq!(ln_10, 10f16.ln(), F16_APPROX);
717+
assert_approx_eq!(frac_pi_2, pi / 2f16, F16_APPROX_L1);
718+
assert_approx_eq!(frac_pi_3, pi / 3f16, F16_APPROX_L1);
719+
assert_approx_eq!(frac_pi_4, pi / 4f16, F16_APPROX_L1);
720+
assert_approx_eq!(frac_pi_6, pi / 6f16, F16_APPROX_L1);
721+
assert_approx_eq!(frac_pi_8, pi / 8f16, F16_APPROX_L1);
722+
assert_approx_eq!(frac_1_pi, 1f16 / pi, F16_APPROX_L1);
723+
assert_approx_eq!(frac_2_pi, 2f16 / pi, F16_APPROX_L1);
724+
assert_approx_eq!(frac_2_sqrtpi, 2f16 / pi.sqrt(), F16_APPROX_L1);
725+
assert_approx_eq!(sqrt2, 2f16.sqrt(), F16_APPROX_L1);
726+
assert_approx_eq!(frac_1_sqrt2, 1f16 / 2f16.sqrt(), F16_APPROX_L1);
727+
assert_approx_eq!(log2_e, e.log2(), F16_APPROX_L1);
728+
assert_approx_eq!(log10_e, e.log10(), F16_APPROX_L1);
729+
assert_approx_eq!(ln_2, 2f16.ln(), F16_APPROX_L1);
730+
assert_approx_eq!(ln_10, 10f16.ln(), F16_APPROX_L1);
741731
}
742732

743733
#[test]

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