acoshf.rs - source

Files

approx

abs_diff_eq.rs lib.rs macros.rs relative_eq.rs ulps_eq.rs

bytemuck

contiguous.rs lib.rs offset_of.rs pod.rs transparent.rs zeroable.rs

convert_case

case.rs lib.rs words.rs

cv_core

camera.rs keypoint.rs lib.rs matches.rs point.rs pose.rs so3.rs triangulation.rs

derive_more

either

eyre

backtrace.rs chain.rs context.rs error.rs fmt.rs kind.rs lib.rs macros.rs wrapper.rs

homography

homography.rs lib.rs

indenter

itertools

libm

math

acos.rs acosf.rs acosh.rs acoshf.rs asin.rs asinf.rs asinh.rs asinhf.rs atan.rs atan2.rs atan2f.rs atanf.rs atanh.rs atanhf.rs cbrt.rs cbrtf.rs ceil.rs ceilf.rs copysign.rs copysignf.rs cos.rs cosf.rs cosh.rs coshf.rs erf.rs erff.rs exp.rs exp10.rs exp10f.rs exp2.rs exp2f.rs expf.rs expm1.rs expm1f.rs expo2.rs fabs.rs fabsf.rs fdim.rs fdimf.rs fenv.rs floor.rs floorf.rs fma.rs fmaf.rs fmax.rs fmaxf.rs fmin.rs fminf.rs fmod.rs fmodf.rs frexp.rs frexpf.rs hypot.rs hypotf.rs ilogb.rs ilogbf.rs j0.rs j0f.rs j1.rs j1f.rs jn.rs jnf.rs k_cos.rs k_cosf.rs k_expo2.rs k_expo2f.rs k_sin.rs k_sinf.rs k_tan.rs k_tanf.rs ldexp.rs ldexpf.rs lgamma.rs lgamma_r.rs lgammaf.rs lgammaf_r.rs log.rs log10.rs log10f.rs log1p.rs log1pf.rs log2.rs log2f.rs logf.rs mod.rs modf.rs modff.rs nextafter.rs nextafterf.rs pow.rs powf.rs rem_pio2.rs rem_pio2_large.rs rem_pio2f.rs remainder.rs remainderf.rs remquo.rs remquof.rs round.rs roundf.rs scalbn.rs scalbnf.rs sin.rs sincos.rs sincosf.rs sinf.rs sinh.rs sinhf.rs sqrt.rs sqrtf.rs tan.rs tanf.rs tanh.rs tanhf.rs tgamma.rs tgammaf.rs trunc.rs truncf.rs

matrixmultiply

x86

macros.rs mod.rs

aligned_alloc.rs archparam_defaults.rs cgemm_common.rs cgemm_kernel.rs debugmacros.rs dgemm_kernel.rs gemm.rs kernel.rs lib.rs loopmacros.rs ptr.rs sgemm_kernel.rs threading.rs util.rs zgemm_kernel.rs

nalgebra

base

geometry

abstract_rotation.rs dual_quaternion.rs dual_quaternion_construction.rs dual_quaternion_conversion.rs dual_quaternion_ops.rs isometry.rs isometry_alias.rs isometry_construction.rs isometry_conversion.rs isometry_interpolation.rs isometry_ops.rs isometry_simba.rs mod.rs op_macros.rs orthographic.rs perspective.rs point.rs point_alias.rs point_construction.rs point_conversion.rs point_coordinates.rs point_ops.rs point_simba.rs quaternion.rs quaternion_construction.rs quaternion_conversion.rs quaternion_coordinates.rs quaternion_ops.rs quaternion_simba.rs reflection.rs reflection_alias.rs rotation.rs rotation_alias.rs rotation_construction.rs rotation_conversion.rs rotation_interpolation.rs rotation_ops.rs rotation_simba.rs rotation_specialization.rs scale.rs scale_alias.rs scale_construction.rs scale_conversion.rs scale_coordinates.rs scale_ops.rs scale_simba.rs similarity.rs similarity_alias.rs similarity_construction.rs similarity_conversion.rs similarity_ops.rs similarity_simba.rs swizzle.rs transform.rs transform_alias.rs transform_construction.rs transform_conversion.rs transform_ops.rs transform_simba.rs translation.rs translation_alias.rs translation_construction.rs translation_conversion.rs translation_coordinates.rs translation_ops.rs translation_simba.rs unit_complex.rs unit_complex_construction.rs unit_complex_conversion.rs unit_complex_ops.rs unit_complex_simba.rs

linalg

third_party

glam

nalgebra_macros

num_complex

cast.rs lib.rs pow.rs

num_integer

average.rs lib.rs roots.rs

num_rational

num_traits

ops

checked.rs inv.rs mod.rs mul_add.rs overflowing.rs saturating.rs wrapping.rs

bounds.rs cast.rs float.rs identities.rs int.rs lib.rs macros.rs pow.rs real.rs sign.rs

once_cell

imp_std.rs lib.rs race.rs

proc_macro2

detection.rs fallback.rs lib.rs marker.rs parse.rs wrapper.rs

quote

ext.rs format.rs ident_fragment.rs lib.rs runtime.rs spanned.rs to_tokens.rs

rawpointer

safe_arch

x86_x64

m128_.rs m128d_.rs m128i_.rs m256_.rs m256d_.rs m256i_.rs sse.rs sse2.rs

lib.rs naming_conventions.rs

sample_consensus

simba

scalar

complex.rs field.rs mod.rs real.rs subset.rs

simd

auto_simd_impl.rs mod.rs simd_bool.rs simd_complex.rs simd_option.rs simd_partial_ord.rs simd_real.rs simd_signed.rs simd_value.rs wide_simd_impl.rs

syn

typenum

array.rs bit.rs int.rs lib.rs marker_traits.rs operator_aliases.rs private.rs type_operators.rs uint.rs

unicode_xid

lib.rs tables.rs

wide

f32x4_.rs f32x8_.rs f64x2_.rs f64x4_.rs i16x16_.rs i16x8_.rs i32x4_.rs i32x8_.rs i64x2_.rs i64x4_.rs i8x16_.rs i8x32_.rs lib.rs macros.rs u16x8_.rs u32x4_.rs u32x8_.rs u64x2_.rs u64x4_.rs u8x16_.rs

use super::{log1pf, logf, sqrtf};

const LN2: f32 = 0.693147180559945309417232121458176568;

/// Inverse hyperbolic cosine (f32)
///
/// Calculates the inverse hyperbolic cosine of `x`.
/// Is defined as `log(x + sqrt(x*x-1))`.
/// `x` must be a number greater than or equal to 1.
pub fn acoshf(x: f32) -> f32 {
    let u = x.to_bits();
    let a = u & 0x7fffffff;

    if a < 0x3f800000 + (1 << 23) {
        /* |x| < 2, invalid if x < 1 or nan */
        /* up to 2ulp error in [1,1.125] */
        return log1pf(x - 1.0 + sqrtf((x - 1.0) * (x - 1.0) + 2.0 * (x - 1.0)));
    }
    if a < 0x3f800000 + (12 << 23) {
        /* |x| < 0x1p12 */
        return logf(2.0 * x - 1.0 / (x + sqrtf(x * x - 1.0)));
    }
    /* x >= 0x1p12 */
    return logf(x) + LN2;
}