-
Notifications
You must be signed in to change notification settings - Fork 12.9k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
enable and extend float-classify test
- Loading branch information
1 parent
c40ee79
commit 3daa951
Showing
3 changed files
with
128 additions
and
126 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file was deleted.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,161 +1,168 @@ | ||
//@ compile-flags: -Zmir-opt-level=0 | ||
//@ run-pass | ||
|
||
// This tests the float classification functions, for regular runtime code and for const evaluation. | ||
|
||
#![feature(const_float_classify)] | ||
#![feature(f16, f16_const)] | ||
#![feature(f128, f128_const)] | ||
#![feature(f16)] | ||
#![feature(f128)] | ||
#![feature(f16_const)] | ||
#![feature(f128_const)] | ||
#![allow(unused_macro_rules)] | ||
// Don't promote | ||
const fn nop<T>(x: T) -> T { x } | ||
|
||
macro_rules! const_assert { | ||
use std::hint::black_box; | ||
|
||
macro_rules! both_assert { | ||
($a:expr) => { | ||
{ | ||
const _: () = assert!($a); | ||
assert!(nop($a)); | ||
// `black_box` prevents promotion, and MIR opts are disabled above, so this is truly | ||
// going through LLVM. | ||
assert!(black_box($a)); | ||
} | ||
}; | ||
($a:expr, $b:expr) => { | ||
{ | ||
const _: () = assert!($a == $b); | ||
assert_eq!(nop($a), nop($b)); | ||
assert_eq!(black_box($a), black_box($b)); | ||
} | ||
}; | ||
} | ||
|
||
fn has_broken_floats() -> bool { | ||
// i586 targets are broken due to <https://github.com/rust-lang/rust/issues/114479>. | ||
std::env::var("TARGET").is_ok_and(|v| v.contains("i586")) | ||
cfg!(all(target_arch = "x86", not(target_feature = "sse2"))) | ||
} | ||
|
||
#[cfg(target_arch = "x86_64")] | ||
fn f16(){ | ||
const_assert!((1f16).to_bits(), 0x3c00); | ||
const_assert!(u16::from_be_bytes(1f16.to_be_bytes()), 0x3c00); | ||
const_assert!((12.5f16).to_bits(), 0x4a40); | ||
const_assert!(u16::from_le_bytes(12.5f16.to_le_bytes()), 0x4a40); | ||
const_assert!((1337f16).to_bits(), 0x6539); | ||
const_assert!(u16::from_ne_bytes(1337f16.to_ne_bytes()), 0x6539); | ||
const_assert!((-14.25f16).to_bits(), 0xcb20); | ||
const_assert!(f16::from_bits(0x3c00), 1.0); | ||
const_assert!(f16::from_be_bytes(0x3c00u16.to_be_bytes()), 1.0); | ||
const_assert!(f16::from_bits(0x4a40), 12.5); | ||
const_assert!(f16::from_le_bytes(0x4a40u16.to_le_bytes()), 12.5); | ||
const_assert!(f16::from_bits(0x5be0), 252.0); | ||
const_assert!(f16::from_ne_bytes(0x5be0u16.to_ne_bytes()), 252.0); | ||
const_assert!(f16::from_bits(0xcb20), -14.25); | ||
both_assert!((1f16).to_bits(), 0x3c00); | ||
both_assert!(u16::from_be_bytes(1f16.to_be_bytes()), 0x3c00); | ||
both_assert!((12.5f16).to_bits(), 0x4a40); | ||
both_assert!(u16::from_le_bytes(12.5f16.to_le_bytes()), 0x4a40); | ||
both_assert!((1337f16).to_bits(), 0x6539); | ||
both_assert!(u16::from_ne_bytes(1337f16.to_ne_bytes()), 0x6539); | ||
both_assert!((-14.25f16).to_bits(), 0xcb20); | ||
both_assert!(f16::from_bits(0x3c00), 1.0); | ||
both_assert!(f16::from_be_bytes(0x3c00u16.to_be_bytes()), 1.0); | ||
both_assert!(f16::from_bits(0x4a40), 12.5); | ||
both_assert!(f16::from_le_bytes(0x4a40u16.to_le_bytes()), 12.5); | ||
both_assert!(f16::from_bits(0x5be0), 252.0); | ||
both_assert!(f16::from_ne_bytes(0x5be0u16.to_ne_bytes()), 252.0); | ||
both_assert!(f16::from_bits(0xcb20), -14.25); | ||
|
||
// Check that NaNs roundtrip their bits regardless of signalingness | ||
// 0xA is 0b1010; 0x5 is 0b0101 -- so these two together clobbers all the mantissa bits | ||
// NOTE: These names assume `f{BITS}::NAN` is a quiet NAN and IEEE754-2008's NaN rules apply! | ||
const QUIET_NAN: u16 = f16::NAN.to_bits() ^ 0x0155; | ||
const SIGNALING_NAN: u16 = f16::NAN.to_bits() ^ 0x02AA; | ||
|
||
const_assert!(f16::from_bits(QUIET_NAN).is_nan()); | ||
const_assert!(f16::from_bits(SIGNALING_NAN).is_nan()); | ||
const_assert!(f16::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
both_assert!(f16::from_bits(QUIET_NAN).is_nan()); | ||
both_assert!(f16::from_bits(SIGNALING_NAN).is_nan()); | ||
both_assert!(f16::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
if !has_broken_floats() { | ||
const_assert!(f16::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
both_assert!(f16::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
} | ||
} | ||
|
||
fn f32() { | ||
const_assert!((1f32).to_bits(), 0x3f800000); | ||
const_assert!(u32::from_be_bytes(1f32.to_be_bytes()), 0x3f800000); | ||
const_assert!((12.5f32).to_bits(), 0x41480000); | ||
const_assert!(u32::from_le_bytes(12.5f32.to_le_bytes()), 0x41480000); | ||
const_assert!((1337f32).to_bits(), 0x44a72000); | ||
const_assert!(u32::from_ne_bytes(1337f32.to_ne_bytes()), 0x44a72000); | ||
const_assert!((-14.25f32).to_bits(), 0xc1640000); | ||
const_assert!(f32::from_bits(0x3f800000), 1.0); | ||
const_assert!(f32::from_be_bytes(0x3f800000u32.to_be_bytes()), 1.0); | ||
const_assert!(f32::from_bits(0x41480000), 12.5); | ||
const_assert!(f32::from_le_bytes(0x41480000u32.to_le_bytes()), 12.5); | ||
const_assert!(f32::from_bits(0x44a72000), 1337.0); | ||
const_assert!(f32::from_ne_bytes(0x44a72000u32.to_ne_bytes()), 1337.0); | ||
const_assert!(f32::from_bits(0xc1640000), -14.25); | ||
both_assert!((1f32).to_bits(), 0x3f800000); | ||
both_assert!(u32::from_be_bytes(1f32.to_be_bytes()), 0x3f800000); | ||
both_assert!((12.5f32).to_bits(), 0x41480000); | ||
both_assert!(u32::from_le_bytes(12.5f32.to_le_bytes()), 0x41480000); | ||
both_assert!((1337f32).to_bits(), 0x44a72000); | ||
both_assert!(u32::from_ne_bytes(1337f32.to_ne_bytes()), 0x44a72000); | ||
both_assert!((-14.25f32).to_bits(), 0xc1640000); | ||
both_assert!(f32::from_bits(0x3f800000), 1.0); | ||
both_assert!(f32::from_be_bytes(0x3f800000u32.to_be_bytes()), 1.0); | ||
both_assert!(f32::from_bits(0x41480000), 12.5); | ||
both_assert!(f32::from_le_bytes(0x41480000u32.to_le_bytes()), 12.5); | ||
both_assert!(f32::from_bits(0x44a72000), 1337.0); | ||
both_assert!(f32::from_ne_bytes(0x44a72000u32.to_ne_bytes()), 1337.0); | ||
both_assert!(f32::from_bits(0xc1640000), -14.25); | ||
|
||
// Check that NaNs roundtrip their bits regardless of signalingness | ||
// 0xA is 0b1010; 0x5 is 0b0101 -- so these two together clobbers all the mantissa bits | ||
// NOTE: These names assume `f{BITS}::NAN` is a quiet NAN and IEEE754-2008's NaN rules apply! | ||
const QUIET_NAN: u32 = f32::NAN.to_bits() ^ 0x002A_AAAA; | ||
const SIGNALING_NAN: u32 = f32::NAN.to_bits() ^ 0x0055_5555; | ||
|
||
const_assert!(f32::from_bits(QUIET_NAN).is_nan()); | ||
const_assert!(f32::from_bits(SIGNALING_NAN).is_nan()); | ||
const_assert!(f32::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
both_assert!(f32::from_bits(QUIET_NAN).is_nan()); | ||
both_assert!(f32::from_bits(SIGNALING_NAN).is_nan()); | ||
both_assert!(f32::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
if !has_broken_floats() { | ||
const_assert!(f32::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
both_assert!(f32::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
} | ||
} | ||
|
||
fn f64() { | ||
const_assert!((1f64).to_bits(), 0x3ff0000000000000); | ||
const_assert!(u64::from_be_bytes(1f64.to_be_bytes()), 0x3ff0000000000000); | ||
const_assert!((12.5f64).to_bits(), 0x4029000000000000); | ||
const_assert!(u64::from_le_bytes(12.5f64.to_le_bytes()), 0x4029000000000000); | ||
const_assert!((1337f64).to_bits(), 0x4094e40000000000); | ||
const_assert!(u64::from_ne_bytes(1337f64.to_ne_bytes()), 0x4094e40000000000); | ||
const_assert!((-14.25f64).to_bits(), 0xc02c800000000000); | ||
const_assert!(f64::from_bits(0x3ff0000000000000), 1.0); | ||
const_assert!(f64::from_be_bytes(0x3ff0000000000000u64.to_be_bytes()), 1.0); | ||
const_assert!(f64::from_bits(0x4029000000000000), 12.5); | ||
const_assert!(f64::from_le_bytes(0x4029000000000000u64.to_le_bytes()), 12.5); | ||
const_assert!(f64::from_bits(0x4094e40000000000), 1337.0); | ||
const_assert!(f64::from_ne_bytes(0x4094e40000000000u64.to_ne_bytes()), 1337.0); | ||
const_assert!(f64::from_bits(0xc02c800000000000), -14.25); | ||
both_assert!((1f64).to_bits(), 0x3ff0000000000000); | ||
both_assert!(u64::from_be_bytes(1f64.to_be_bytes()), 0x3ff0000000000000); | ||
both_assert!((12.5f64).to_bits(), 0x4029000000000000); | ||
both_assert!(u64::from_le_bytes(12.5f64.to_le_bytes()), 0x4029000000000000); | ||
both_assert!((1337f64).to_bits(), 0x4094e40000000000); | ||
both_assert!(u64::from_ne_bytes(1337f64.to_ne_bytes()), 0x4094e40000000000); | ||
both_assert!((-14.25f64).to_bits(), 0xc02c800000000000); | ||
both_assert!(f64::from_bits(0x3ff0000000000000), 1.0); | ||
both_assert!(f64::from_be_bytes(0x3ff0000000000000u64.to_be_bytes()), 1.0); | ||
both_assert!(f64::from_bits(0x4029000000000000), 12.5); | ||
both_assert!(f64::from_le_bytes(0x4029000000000000u64.to_le_bytes()), 12.5); | ||
both_assert!(f64::from_bits(0x4094e40000000000), 1337.0); | ||
both_assert!(f64::from_ne_bytes(0x4094e40000000000u64.to_ne_bytes()), 1337.0); | ||
both_assert!(f64::from_bits(0xc02c800000000000), -14.25); | ||
|
||
// Check that NaNs roundtrip their bits regardless of signalingness | ||
// 0xA is 0b1010; 0x5 is 0b0101 -- so these two together clobbers all the mantissa bits | ||
// NOTE: These names assume `f{BITS}::NAN` is a quiet NAN and IEEE754-2008's NaN rules apply! | ||
const QUIET_NAN: u64 = f64::NAN.to_bits() ^ 0x0005_5555_5555_5555; | ||
const SIGNALING_NAN: u64 = f64::NAN.to_bits() ^ 0x000A_AAAA_AAAA_AAAA; | ||
|
||
const_assert!(f64::from_bits(QUIET_NAN).is_nan()); | ||
const_assert!(f64::from_bits(SIGNALING_NAN).is_nan()); | ||
const_assert!(f64::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
both_assert!(f64::from_bits(QUIET_NAN).is_nan()); | ||
both_assert!(f64::from_bits(SIGNALING_NAN).is_nan()); | ||
both_assert!(f64::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
if !has_broken_floats() { | ||
const_assert!(f64::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
both_assert!(f64::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
} | ||
} | ||
|
||
#[cfg(target_arch = "x86_64")] | ||
fn f128() { | ||
const_assert!((1f128).to_bits(), 0x3fff0000000000000000000000000000); | ||
const_assert!(u128::from_be_bytes(1f128.to_be_bytes()), 0x3fff0000000000000000000000000000); | ||
const_assert!((12.5f128).to_bits(), 0x40029000000000000000000000000000); | ||
const_assert!(u128::from_le_bytes(12.5f128.to_le_bytes()), 0x40029000000000000000000000000000); | ||
const_assert!((1337f128).to_bits(), 0x40094e40000000000000000000000000); | ||
const_assert!(u128::from_ne_bytes(1337f128.to_ne_bytes()), 0x40094e40000000000000000000000000); | ||
const_assert!((-14.25f128).to_bits(), 0xc002c800000000000000000000000000); | ||
const_assert!(f128::from_bits(0x3fff0000000000000000000000000000), 1.0); | ||
const_assert!(f128::from_be_bytes(0x3fff0000000000000000000000000000u128.to_be_bytes()), 1.0); | ||
const_assert!(f128::from_bits(0x40029000000000000000000000000000), 12.5); | ||
const_assert!(f128::from_le_bytes(0x40029000000000000000000000000000u128.to_le_bytes()), 12.5); | ||
const_assert!(f128::from_bits(0x40094e40000000000000000000000000), 1337.0); | ||
both_assert!((1f128).to_bits(), 0x3fff0000000000000000000000000000); | ||
both_assert!(u128::from_be_bytes(1f128.to_be_bytes()), 0x3fff0000000000000000000000000000); | ||
both_assert!((12.5f128).to_bits(), 0x40029000000000000000000000000000); | ||
both_assert!(u128::from_le_bytes(12.5f128.to_le_bytes()), 0x40029000000000000000000000000000); | ||
both_assert!((1337f128).to_bits(), 0x40094e40000000000000000000000000); | ||
both_assert!(u128::from_ne_bytes(1337f128.to_ne_bytes()), 0x40094e40000000000000000000000000); | ||
both_assert!((-14.25f128).to_bits(), 0xc002c800000000000000000000000000); | ||
both_assert!(f128::from_bits(0x3fff0000000000000000000000000000), 1.0); | ||
both_assert!(f128::from_be_bytes(0x3fff0000000000000000000000000000u128.to_be_bytes()), 1.0); | ||
both_assert!(f128::from_bits(0x40029000000000000000000000000000), 12.5); | ||
both_assert!(f128::from_le_bytes(0x40029000000000000000000000000000u128.to_le_bytes()), 12.5); | ||
both_assert!(f128::from_bits(0x40094e40000000000000000000000000), 1337.0); | ||
assert_eq!(f128::from_ne_bytes(0x40094e40000000000000000000000000u128.to_ne_bytes()), 1337.0); | ||
const_assert!(f128::from_bits(0xc002c800000000000000000000000000), -14.25); | ||
both_assert!(f128::from_bits(0xc002c800000000000000000000000000), -14.25); | ||
|
||
// Check that NaNs roundtrip their bits regardless of signalingness | ||
// 0xA is 0b1010; 0x5 is 0b0101 -- so these two together clobbers all the mantissa bits | ||
// NOTE: These names assume `f{BITS}::NAN` is a quiet NAN and IEEE754-2008's NaN rules apply! | ||
const QUIET_NAN: u128 = f128::NAN.to_bits() | 0x0000_AAAA_AAAA_AAAA_AAAA_AAAA_AAAA_AAAA; | ||
const SIGNALING_NAN: u128 = f128::NAN.to_bits() ^ 0x0000_5555_5555_5555_5555_5555_5555_5555; | ||
|
||
const_assert!(f128::from_bits(QUIET_NAN).is_nan()); | ||
const_assert!(f128::from_bits(SIGNALING_NAN).is_nan()); | ||
const_assert!(f128::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
both_assert!(f128::from_bits(QUIET_NAN).is_nan()); | ||
both_assert!(f128::from_bits(SIGNALING_NAN).is_nan()); | ||
both_assert!(f128::from_bits(QUIET_NAN).to_bits(), QUIET_NAN); | ||
if !has_broken_floats() { | ||
const_assert!(f128::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
both_assert!(f128::from_bits(SIGNALING_NAN).to_bits(), SIGNALING_NAN); | ||
} | ||
} | ||
|
||
fn main() { | ||
f32(); | ||
f64(); | ||
|
||
#[cfg(target_arch = "x86_64")] | ||
{ | ||
f16(); | ||
f128(); | ||
} | ||
f32(); | ||
f64(); | ||
} |