#![stable(feature = "rust1", since = "1.0.0")]
#![allow(missing_docs)]
#[cfg(not(test))]
use crate::intrinsics;
#[cfg(not(test))]
use crate::sys::cmath;
#[stable(feature = "rust1", since = "1.0.0")]
pub use core::f32::{RADIX, MANTISSA_DIGITS, DIGITS, EPSILON};
#[stable(feature = "rust1", since = "1.0.0")]
pub use core::f32::{MIN_EXP, MAX_EXP, MIN_10_EXP};
#[stable(feature = "rust1", since = "1.0.0")]
pub use core::f32::{MAX_10_EXP, NAN, INFINITY, NEG_INFINITY};
#[stable(feature = "rust1", since = "1.0.0")]
pub use core::f32::{MIN, MIN_POSITIVE, MAX};
#[stable(feature = "rust1", since = "1.0.0")]
pub use core::f32::consts;
#[cfg(not(test))]
#[lang = "f32_runtime"]
impl f32 {
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn floor(self) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).floor() as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::floorf32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn ceil(self) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).ceil() as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::ceilf32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn round(self) -> f32 {
unsafe { intrinsics::roundf32(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn trunc(self) -> f32 {
unsafe { intrinsics::truncf32(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn fract(self) -> f32 { self - self.trunc() }
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn abs(self) -> f32 {
unsafe { intrinsics::fabsf32(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn signum(self) -> f32 {
if self.is_nan() {
NAN
} else {
1.0_f32.copysign(self)
}
}
#[inline]
#[must_use]
#[stable(feature = "copysign", since = "1.35.0")]
pub fn copysign(self, sign: f32) -> f32 {
unsafe { intrinsics::copysignf32(self, sign) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn mul_add(self, a: f32, b: f32) -> f32 {
unsafe { intrinsics::fmaf32(self, a, b) }
}
#[inline]
#[stable(feature = "euclidean_division", since = "1.38.0")]
pub fn div_euclid(self, rhs: f32) -> f32 {
let q = (self / rhs).trunc();
if self % rhs < 0.0 {
return if rhs > 0.0 { q - 1.0 } else { q + 1.0 }
}
q
}
#[inline]
#[stable(feature = "euclidean_division", since = "1.38.0")]
pub fn rem_euclid(self, rhs: f32) -> f32 {
let r = self % rhs;
if r < 0.0 {
r + rhs.abs()
} else {
r
}
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn powi(self, n: i32) -> f32 {
unsafe { intrinsics::powif32(self, n) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn powf(self, n: f32) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).powf(n as f64) as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::powf32(self, n) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn sqrt(self) -> f32 {
if self < 0.0 {
NAN
} else {
unsafe { intrinsics::sqrtf32(self) }
}
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn exp(self) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).exp() as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::expf32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn exp2(self) -> f32 {
unsafe { intrinsics::exp2f32(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn ln(self) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).ln() as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::logf32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn log(self, base: f32) -> f32 { self.ln() / base.ln() }
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn log2(self) -> f32 {
#[cfg(target_os = "android")]
return crate::sys::android::log2f32(self);
#[cfg(not(target_os = "android"))]
return unsafe { intrinsics::log2f32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn log10(self) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).log10() as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::log10f32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
#[rustc_deprecated(since = "1.10.0",
reason = "you probably meant `(self - other).abs()`: \
this operation is `(self - other).max(0.0)` \
except that `abs_sub` also propagates NaNs (also \
known as `fdimf` in C). If you truly need the positive \
difference, consider using that expression or the C function \
`fdimf`, depending on how you wish to handle NaN (please consider \
filing an issue describing your use-case too).")]
pub fn abs_sub(self, other: f32) -> f32 {
unsafe { cmath::fdimf(self, other) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn cbrt(self) -> f32 {
unsafe { cmath::cbrtf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn hypot(self, other: f32) -> f32 {
unsafe { cmath::hypotf(self, other) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn sin(self) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).sin() as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::sinf32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn cos(self) -> f32 {
#[cfg(target_env = "msvc")]
return (self as f64).cos() as f32;
#[cfg(not(target_env = "msvc"))]
return unsafe { intrinsics::cosf32(self) };
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn tan(self) -> f32 {
unsafe { cmath::tanf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn asin(self) -> f32 {
unsafe { cmath::asinf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn acos(self) -> f32 {
unsafe { cmath::acosf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn atan(self) -> f32 {
unsafe { cmath::atanf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn atan2(self, other: f32) -> f32 {
unsafe { cmath::atan2f(self, other) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn sin_cos(self) -> (f32, f32) {
(self.sin(), self.cos())
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn exp_m1(self) -> f32 {
unsafe { cmath::expm1f(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn ln_1p(self) -> f32 {
unsafe { cmath::log1pf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn sinh(self) -> f32 {
unsafe { cmath::sinhf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn cosh(self) -> f32 {
unsafe { cmath::coshf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn tanh(self) -> f32 {
unsafe { cmath::tanhf(self) }
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn asinh(self) -> f32 {
if self == NEG_INFINITY {
NEG_INFINITY
} else {
(self + ((self * self) + 1.0).sqrt()).ln().copysign(self)
}
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn acosh(self) -> f32 {
if self < 1.0 {
crate::f32::NAN
} else {
(self + ((self * self) - 1.0).sqrt()).ln()
}
}
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn atanh(self) -> f32 {
0.5 * ((2.0 * self) / (1.0 - self)).ln_1p()
}
#[unstable(feature = "clamp", issue = "44095")]
#[inline]
pub fn clamp(self, min: f32, max: f32) -> f32 {
assert!(min <= max);
let mut x = self;
if x < min { x = min; }
if x > max { x = max; }
x
}
}
#[cfg(test)]
mod tests {
use crate::f32;
use crate::f32::*;
use crate::num::*;
use crate::num::FpCategory as Fp;
#[test]
fn test_num_f32() {
test_num(10f32, 2f32);
}
#[test]
fn test_min_nan() {
assert_eq!(NAN.min(2.0), 2.0);
assert_eq!(2.0f32.min(NAN), 2.0);
}
#[test]
fn test_max_nan() {
assert_eq!(NAN.max(2.0), 2.0);
assert_eq!(2.0f32.max(NAN), 2.0);
}
#[test]
fn test_nan() {
let nan: f32 = f32::NAN;
assert!(nan.is_nan());
assert!(!nan.is_infinite());
assert!(!nan.is_finite());
assert!(!nan.is_normal());
assert!(nan.is_sign_positive());
assert!(!nan.is_sign_negative());
assert_eq!(Fp::Nan, nan.classify());
}
#[test]
fn test_infinity() {
let inf: f32 = f32::INFINITY;
assert!(inf.is_infinite());
assert!(!inf.is_finite());
assert!(inf.is_sign_positive());
assert!(!inf.is_sign_negative());
assert!(!inf.is_nan());
assert!(!inf.is_normal());
assert_eq!(Fp::Infinite, inf.classify());
}
#[test]
fn test_neg_infinity() {
let neg_inf: f32 = f32::NEG_INFINITY;
assert!(neg_inf.is_infinite());
assert!(!neg_inf.is_finite());
assert!(!neg_inf.is_sign_positive());
assert!(neg_inf.is_sign_negative());
assert!(!neg_inf.is_nan());
assert!(!neg_inf.is_normal());
assert_eq!(Fp::Infinite, neg_inf.classify());
}
#[test]
fn test_zero() {
let zero: f32 = 0.0f32;
assert_eq!(0.0, zero);
assert!(!zero.is_infinite());
assert!(zero.is_finite());
assert!(zero.is_sign_positive());
assert!(!zero.is_sign_negative());
assert!(!zero.is_nan());
assert!(!zero.is_normal());
assert_eq!(Fp::Zero, zero.classify());
}
#[test]
fn test_neg_zero() {
let neg_zero: f32 = -0.0;
assert_eq!(0.0, neg_zero);
assert!(!neg_zero.is_infinite());
assert!(neg_zero.is_finite());
assert!(!neg_zero.is_sign_positive());
assert!(neg_zero.is_sign_negative());
assert!(!neg_zero.is_nan());
assert!(!neg_zero.is_normal());
assert_eq!(Fp::Zero, neg_zero.classify());
}
#[test]
fn test_one() {
let one: f32 = 1.0f32;
assert_eq!(1.0, one);
assert!(!one.is_infinite());
assert!(one.is_finite());
assert!(one.is_sign_positive());
assert!(!one.is_sign_negative());
assert!(!one.is_nan());
assert!(one.is_normal());
assert_eq!(Fp::Normal, one.classify());
}
#[test]
fn test_is_nan() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert!(nan.is_nan());
assert!(!0.0f32.is_nan());
assert!(!5.3f32.is_nan());
assert!(!(-10.732f32).is_nan());
assert!(!inf.is_nan());
assert!(!neg_inf.is_nan());
}
#[test]
fn test_is_infinite() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert!(!nan.is_infinite());
assert!(inf.is_infinite());
assert!(neg_inf.is_infinite());
assert!(!0.0f32.is_infinite());
assert!(!42.8f32.is_infinite());
assert!(!(-109.2f32).is_infinite());
}
#[test]
fn test_is_finite() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert!(!nan.is_finite());
assert!(!inf.is_finite());
assert!(!neg_inf.is_finite());
assert!(0.0f32.is_finite());
assert!(42.8f32.is_finite());
assert!((-109.2f32).is_finite());
}
#[test]
fn test_is_normal() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
let zero: f32 = 0.0f32;
let neg_zero: f32 = -0.0;
assert!(!nan.is_normal());
assert!(!inf.is_normal());
assert!(!neg_inf.is_normal());
assert!(!zero.is_normal());
assert!(!neg_zero.is_normal());
assert!(1f32.is_normal());
assert!(1e-37f32.is_normal());
assert!(!1e-38f32.is_normal());
}
#[test]
fn test_classify() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
let zero: f32 = 0.0f32;
let neg_zero: f32 = -0.0;
assert_eq!(nan.classify(), Fp::Nan);
assert_eq!(inf.classify(), Fp::Infinite);
assert_eq!(neg_inf.classify(), Fp::Infinite);
assert_eq!(zero.classify(), Fp::Zero);
assert_eq!(neg_zero.classify(), Fp::Zero);
assert_eq!(1f32.classify(), Fp::Normal);
assert_eq!(1e-37f32.classify(), Fp::Normal);
assert_eq!(1e-38f32.classify(), Fp::Subnormal);
}
#[test]
fn test_floor() {
assert_approx_eq!(1.0f32.floor(), 1.0f32);
assert_approx_eq!(1.3f32.floor(), 1.0f32);
assert_approx_eq!(1.5f32.floor(), 1.0f32);
assert_approx_eq!(1.7f32.floor(), 1.0f32);
assert_approx_eq!(0.0f32.floor(), 0.0f32);
assert_approx_eq!((-0.0f32).floor(), -0.0f32);
assert_approx_eq!((-1.0f32).floor(), -1.0f32);
assert_approx_eq!((-1.3f32).floor(), -2.0f32);
assert_approx_eq!((-1.5f32).floor(), -2.0f32);
assert_approx_eq!((-1.7f32).floor(), -2.0f32);
}
#[test]
fn test_ceil() {
assert_approx_eq!(1.0f32.ceil(), 1.0f32);
assert_approx_eq!(1.3f32.ceil(), 2.0f32);
assert_approx_eq!(1.5f32.ceil(), 2.0f32);
assert_approx_eq!(1.7f32.ceil(), 2.0f32);
assert_approx_eq!(0.0f32.ceil(), 0.0f32);
assert_approx_eq!((-0.0f32).ceil(), -0.0f32);
assert_approx_eq!((-1.0f32).ceil(), -1.0f32);
assert_approx_eq!((-1.3f32).ceil(), -1.0f32);
assert_approx_eq!((-1.5f32).ceil(), -1.0f32);
assert_approx_eq!((-1.7f32).ceil(), -1.0f32);
}
#[test]
fn test_round() {
assert_approx_eq!(1.0f32.round(), 1.0f32);
assert_approx_eq!(1.3f32.round(), 1.0f32);
assert_approx_eq!(1.5f32.round(), 2.0f32);
assert_approx_eq!(1.7f32.round(), 2.0f32);
assert_approx_eq!(0.0f32.round(), 0.0f32);
assert_approx_eq!((-0.0f32).round(), -0.0f32);
assert_approx_eq!((-1.0f32).round(), -1.0f32);
assert_approx_eq!((-1.3f32).round(), -1.0f32);
assert_approx_eq!((-1.5f32).round(), -2.0f32);
assert_approx_eq!((-1.7f32).round(), -2.0f32);
}
#[test]
fn test_trunc() {
assert_approx_eq!(1.0f32.trunc(), 1.0f32);
assert_approx_eq!(1.3f32.trunc(), 1.0f32);
assert_approx_eq!(1.5f32.trunc(), 1.0f32);
assert_approx_eq!(1.7f32.trunc(), 1.0f32);
assert_approx_eq!(0.0f32.trunc(), 0.0f32);
assert_approx_eq!((-0.0f32).trunc(), -0.0f32);
assert_approx_eq!((-1.0f32).trunc(), -1.0f32);
assert_approx_eq!((-1.3f32).trunc(), -1.0f32);
assert_approx_eq!((-1.5f32).trunc(), -1.0f32);
assert_approx_eq!((-1.7f32).trunc(), -1.0f32);
}
#[test]
fn test_fract() {
assert_approx_eq!(1.0f32.fract(), 0.0f32);
assert_approx_eq!(1.3f32.fract(), 0.3f32);
assert_approx_eq!(1.5f32.fract(), 0.5f32);
assert_approx_eq!(1.7f32.fract(), 0.7f32);
assert_approx_eq!(0.0f32.fract(), 0.0f32);
assert_approx_eq!((-0.0f32).fract(), -0.0f32);
assert_approx_eq!((-1.0f32).fract(), -0.0f32);
assert_approx_eq!((-1.3f32).fract(), -0.3f32);
assert_approx_eq!((-1.5f32).fract(), -0.5f32);
assert_approx_eq!((-1.7f32).fract(), -0.7f32);
}
#[test]
fn test_abs() {
assert_eq!(INFINITY.abs(), INFINITY);
assert_eq!(1f32.abs(), 1f32);
assert_eq!(0f32.abs(), 0f32);
assert_eq!((-0f32).abs(), 0f32);
assert_eq!((-1f32).abs(), 1f32);
assert_eq!(NEG_INFINITY.abs(), INFINITY);
assert_eq!((1f32/NEG_INFINITY).abs(), 0f32);
assert!(NAN.abs().is_nan());
}
#[test]
fn test_signum() {
assert_eq!(INFINITY.signum(), 1f32);
assert_eq!(1f32.signum(), 1f32);
assert_eq!(0f32.signum(), 1f32);
assert_eq!((-0f32).signum(), -1f32);
assert_eq!((-1f32).signum(), -1f32);
assert_eq!(NEG_INFINITY.signum(), -1f32);
assert_eq!((1f32/NEG_INFINITY).signum(), -1f32);
assert!(NAN.signum().is_nan());
}
#[test]
fn test_is_sign_positive() {
assert!(INFINITY.is_sign_positive());
assert!(1f32.is_sign_positive());
assert!(0f32.is_sign_positive());
assert!(!(-0f32).is_sign_positive());
assert!(!(-1f32).is_sign_positive());
assert!(!NEG_INFINITY.is_sign_positive());
assert!(!(1f32/NEG_INFINITY).is_sign_positive());
assert!(NAN.is_sign_positive());
assert!(!(-NAN).is_sign_positive());
}
#[test]
fn test_is_sign_negative() {
assert!(!INFINITY.is_sign_negative());
assert!(!1f32.is_sign_negative());
assert!(!0f32.is_sign_negative());
assert!((-0f32).is_sign_negative());
assert!((-1f32).is_sign_negative());
assert!(NEG_INFINITY.is_sign_negative());
assert!((1f32/NEG_INFINITY).is_sign_negative());
assert!(!NAN.is_sign_negative());
assert!((-NAN).is_sign_negative());
}
#[test]
fn test_mul_add() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_approx_eq!(12.3f32.mul_add(4.5, 6.7), 62.05);
assert_approx_eq!((-12.3f32).mul_add(-4.5, -6.7), 48.65);
assert_approx_eq!(0.0f32.mul_add(8.9, 1.2), 1.2);
assert_approx_eq!(3.4f32.mul_add(-0.0, 5.6), 5.6);
assert!(nan.mul_add(7.8, 9.0).is_nan());
assert_eq!(inf.mul_add(7.8, 9.0), inf);
assert_eq!(neg_inf.mul_add(7.8, 9.0), neg_inf);
assert_eq!(8.9f32.mul_add(inf, 3.2), inf);
assert_eq!((-3.2f32).mul_add(2.4, neg_inf), neg_inf);
}
#[test]
fn test_recip() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_eq!(1.0f32.recip(), 1.0);
assert_eq!(2.0f32.recip(), 0.5);
assert_eq!((-0.4f32).recip(), -2.5);
assert_eq!(0.0f32.recip(), inf);
assert!(nan.recip().is_nan());
assert_eq!(inf.recip(), 0.0);
assert_eq!(neg_inf.recip(), 0.0);
}
#[test]
fn test_powi() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_eq!(1.0f32.powi(1), 1.0);
assert_approx_eq!((-3.1f32).powi(2), 9.61);
assert_approx_eq!(5.9f32.powi(-2), 0.028727);
assert_eq!(8.3f32.powi(0), 1.0);
assert!(nan.powi(2).is_nan());
assert_eq!(inf.powi(3), inf);
assert_eq!(neg_inf.powi(2), inf);
}
#[test]
fn test_powf() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_eq!(1.0f32.powf(1.0), 1.0);
assert_approx_eq!(3.4f32.powf(4.5), 246.408218);
assert_approx_eq!(2.7f32.powf(-3.2), 0.041652);
assert_approx_eq!((-3.1f32).powf(2.0), 9.61);
assert_approx_eq!(5.9f32.powf(-2.0), 0.028727);
assert_eq!(8.3f32.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]
fn test_sqrt_domain() {
assert!(NAN.sqrt().is_nan());
assert!(NEG_INFINITY.sqrt().is_nan());
assert!((-1.0f32).sqrt().is_nan());
assert_eq!((-0.0f32).sqrt(), -0.0);
assert_eq!(0.0f32.sqrt(), 0.0);
assert_eq!(1.0f32.sqrt(), 1.0);
assert_eq!(INFINITY.sqrt(), INFINITY);
}
#[test]
fn test_exp() {
assert_eq!(1.0, 0.0f32.exp());
assert_approx_eq!(2.718282, 1.0f32.exp());
assert_approx_eq!(148.413162, 5.0f32.exp());
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
let nan: f32 = f32::NAN;
assert_eq!(inf, inf.exp());
assert_eq!(0.0, neg_inf.exp());
assert!(nan.exp().is_nan());
}
#[test]
fn test_exp2() {
assert_eq!(32.0, 5.0f32.exp2());
assert_eq!(1.0, 0.0f32.exp2());
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
let nan: f32 = f32::NAN;
assert_eq!(inf, inf.exp2());
assert_eq!(0.0, neg_inf.exp2());
assert!(nan.exp2().is_nan());
}
#[test]
fn test_ln() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_approx_eq!(1.0f32.exp().ln(), 1.0);
assert!(nan.ln().is_nan());
assert_eq!(inf.ln(), inf);
assert!(neg_inf.ln().is_nan());
assert!((-2.3f32).ln().is_nan());
assert_eq!((-0.0f32).ln(), neg_inf);
assert_eq!(0.0f32.ln(), neg_inf);
assert_approx_eq!(4.0f32.ln(), 1.386294);
}
#[test]
fn test_log() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_eq!(10.0f32.log(10.0), 1.0);
assert_approx_eq!(2.3f32.log(3.5), 0.664858);
assert_eq!(1.0f32.exp().log(1.0f32.exp()), 1.0);
assert!(1.0f32.log(1.0).is_nan());
assert!(1.0f32.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!((-2.3f32).log(0.1).is_nan());
assert_eq!((-0.0f32).log(2.0), neg_inf);
assert_eq!(0.0f32.log(7.0), neg_inf);
}
#[test]
fn test_log2() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_approx_eq!(10.0f32.log2(), 3.321928);
assert_approx_eq!(2.3f32.log2(), 1.201634);
assert_approx_eq!(1.0f32.exp().log2(), 1.442695);
assert!(nan.log2().is_nan());
assert_eq!(inf.log2(), inf);
assert!(neg_inf.log2().is_nan());
assert!((-2.3f32).log2().is_nan());
assert_eq!((-0.0f32).log2(), neg_inf);
assert_eq!(0.0f32.log2(), neg_inf);
}
#[test]
fn test_log10() {
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_eq!(10.0f32.log10(), 1.0);
assert_approx_eq!(2.3f32.log10(), 0.361728);
assert_approx_eq!(1.0f32.exp().log10(), 0.434294);
assert_eq!(1.0f32.log10(), 0.0);
assert!(nan.log10().is_nan());
assert_eq!(inf.log10(), inf);
assert!(neg_inf.log10().is_nan());
assert!((-2.3f32).log10().is_nan());
assert_eq!((-0.0f32).log10(), neg_inf);
assert_eq!(0.0f32.log10(), neg_inf);
}
#[test]
fn test_to_degrees() {
let pi: f32 = consts::PI;
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_eq!(0.0f32.to_degrees(), 0.0);
assert_approx_eq!((-5.8f32).to_degrees(), -332.315521);
assert_eq!(pi.to_degrees(), 180.0);
assert!(nan.to_degrees().is_nan());
assert_eq!(inf.to_degrees(), inf);
assert_eq!(neg_inf.to_degrees(), neg_inf);
assert_eq!(1_f32.to_degrees(), 57.2957795130823208767981548141051703);
}
#[test]
fn test_to_radians() {
let pi: f32 = consts::PI;
let nan: f32 = f32::NAN;
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
assert_eq!(0.0f32.to_radians(), 0.0);
assert_approx_eq!(154.6f32.to_radians(), 2.698279);
assert_approx_eq!((-332.31f32).to_radians(), -5.799903);
assert_eq!(180.0f32.to_radians(), pi);
assert!(nan.to_radians().is_nan());
assert_eq!(inf.to_radians(), inf);
assert_eq!(neg_inf.to_radians(), neg_inf);
}
#[test]
fn test_asinh() {
assert_eq!(0.0f32.asinh(), 0.0f32);
assert_eq!((-0.0f32).asinh(), -0.0f32);
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
let nan: f32 = f32::NAN;
assert_eq!(inf.asinh(), inf);
assert_eq!(neg_inf.asinh(), neg_inf);
assert!(nan.asinh().is_nan());
assert!((-0.0f32).asinh().is_sign_negative());
assert_approx_eq!(2.0f32.asinh(), 1.443635475178810342493276740273105f32);
assert_approx_eq!((-2.0f32).asinh(), -1.443635475178810342493276740273105f32);
}
#[test]
fn test_acosh() {
assert_eq!(1.0f32.acosh(), 0.0f32);
assert!(0.999f32.acosh().is_nan());
let inf: f32 = f32::INFINITY;
let neg_inf: f32 = f32::NEG_INFINITY;
let nan: f32 = f32::NAN;
assert_eq!(inf.acosh(), inf);
assert!(neg_inf.acosh().is_nan());
assert!(nan.acosh().is_nan());
assert_approx_eq!(2.0f32.acosh(), 1.31695789692481670862504634730796844f32);
assert_approx_eq!(3.0f32.acosh(), 1.76274717403908605046521864995958461f32);
}
#[test]
fn test_atanh() {
assert_eq!(0.0f32.atanh(), 0.0f32);
assert_eq!((-0.0f32).atanh(), -0.0f32);
let inf32: f32 = f32::INFINITY;
let neg_inf32: f32 = f32::NEG_INFINITY;
assert_eq!(1.0f32.atanh(), inf32);
assert_eq!((-1.0f32).atanh(), neg_inf32);
assert!(2f64.atanh().atanh().is_nan());
assert!((-2f64).atanh().atanh().is_nan());
let inf64: f32 = f32::INFINITY;
let neg_inf64: f32 = f32::NEG_INFINITY;
let nan32: f32 = f32::NAN;
assert!(inf64.atanh().is_nan());
assert!(neg_inf64.atanh().is_nan());
assert!(nan32.atanh().is_nan());
assert_approx_eq!(0.5f32.atanh(), 0.54930614433405484569762261846126285f32);
assert_approx_eq!((-0.5f32).atanh(), -0.54930614433405484569762261846126285f32);
}
#[test]
fn test_real_consts() {
use super::consts;
let pi: f32 = consts::PI;
let frac_pi_2: f32 = consts::FRAC_PI_2;
let frac_pi_3: f32 = consts::FRAC_PI_3;
let frac_pi_4: f32 = consts::FRAC_PI_4;
let frac_pi_6: f32 = consts::FRAC_PI_6;
let frac_pi_8: f32 = consts::FRAC_PI_8;
let frac_1_pi: f32 = consts::FRAC_1_PI;
let frac_2_pi: f32 = consts::FRAC_2_PI;
let frac_2_sqrtpi: f32 = consts::FRAC_2_SQRT_PI;
let sqrt2: f32 = consts::SQRT_2;
let frac_1_sqrt2: f32 = consts::FRAC_1_SQRT_2;
let e: f32 = consts::E;
let log2_e: f32 = consts::LOG2_E;
let log10_e: f32 = consts::LOG10_E;
let ln_2: f32 = consts::LN_2;
let ln_10: f32 = consts::LN_10;
assert_approx_eq!(frac_pi_2, pi / 2f32);
assert_approx_eq!(frac_pi_3, pi / 3f32);
assert_approx_eq!(frac_pi_4, pi / 4f32);
assert_approx_eq!(frac_pi_6, pi / 6f32);
assert_approx_eq!(frac_pi_8, pi / 8f32);
assert_approx_eq!(frac_1_pi, 1f32 / pi);
assert_approx_eq!(frac_2_pi, 2f32 / pi);
assert_approx_eq!(frac_2_sqrtpi, 2f32 / pi.sqrt());
assert_approx_eq!(sqrt2, 2f32.sqrt());
assert_approx_eq!(frac_1_sqrt2, 1f32 / 2f32.sqrt());
assert_approx_eq!(log2_e, e.log2());
assert_approx_eq!(log10_e, e.log10());
assert_approx_eq!(ln_2, 2f32.ln());
assert_approx_eq!(ln_10, 10f32.ln());
}
#[test]
fn test_float_bits_conv() {
assert_eq!((1f32).to_bits(), 0x3f800000);
assert_eq!((12.5f32).to_bits(), 0x41480000);
assert_eq!((1337f32).to_bits(), 0x44a72000);
assert_eq!((-14.25f32).to_bits(), 0xc1640000);
assert_approx_eq!(f32::from_bits(0x3f800000), 1.0);
assert_approx_eq!(f32::from_bits(0x41480000), 12.5);
assert_approx_eq!(f32::from_bits(0x44a72000), 1337.0);
assert_approx_eq!(f32::from_bits(0xc1640000), -14.25);
let masked_nan1 = f32::NAN.to_bits() ^ 0x002A_AAAA;
let masked_nan2 = f32::NAN.to_bits() ^ 0x0055_5555;
assert!(f32::from_bits(masked_nan1).is_nan());
assert!(f32::from_bits(masked_nan2).is_nan());
assert_eq!(f32::from_bits(masked_nan1).to_bits(), masked_nan1);
assert_eq!(f32::from_bits(masked_nan2).to_bits(), masked_nan2);
}
#[test]
#[should_panic]
fn test_clamp_min_greater_than_max() {
1.0f32.clamp(3.0, 1.0);
}
#[test]
#[should_panic]
fn test_clamp_min_is_nan() {
1.0f32.clamp(NAN, 1.0);
}
#[test]
#[should_panic]
fn test_clamp_max_is_nan() {
1.0f32.clamp(3.0, NAN);
}
}