diff options
Diffstat (limited to 'libc/src/math/generic')
| -rw-r--r-- | libc/src/math/generic/CMakeLists.txt | 7 | ||||
| -rw-r--r-- | libc/src/math/generic/asinhf.cpp | 106 |
2 files changed, 3 insertions, 110 deletions
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt index d4d268c..f91feacb 100644 --- a/libc/src/math/generic/CMakeLists.txt +++ b/libc/src/math/generic/CMakeLists.txt @@ -3889,12 +3889,7 @@ add_entrypoint_object( HDRS ../asinhf.h DEPENDS - .explogxf - libc.src.__support.FPUtil.fp_bits - libc.src.__support.FPUtil.multiply_add - libc.src.__support.FPUtil.polyeval - libc.src.__support.FPUtil.sqrt - libc.src.__support.macros.optimization + libc.src.__support.math.asinhf ) add_entrypoint_object( diff --git a/libc/src/math/generic/asinhf.cpp b/libc/src/math/generic/asinhf.cpp index 3aed3bc..45023c8 100644 --- a/libc/src/math/generic/asinhf.cpp +++ b/libc/src/math/generic/asinhf.cpp @@ -7,112 +7,10 @@ //===----------------------------------------------------------------------===// #include "src/math/asinhf.h" -#include "src/__support/FPUtil/FPBits.h" -#include "src/__support/FPUtil/PolyEval.h" -#include "src/__support/FPUtil/multiply_add.h" -#include "src/__support/FPUtil/sqrt.h" -#include "src/__support/macros/config.h" -#include "src/__support/macros/optimization.h" // LIBC_UNLIKELY -#include "src/math/generic/common_constants.h" -#include "src/math/generic/explogxf.h" +#include "src/__support/math/asinhf.h" namespace LIBC_NAMESPACE_DECL { -LLVM_LIBC_FUNCTION(float, asinhf, (float x)) { - using namespace acoshf_internal; - using FPBits_t = typename fputil::FPBits<float>; - FPBits_t xbits(x); - uint32_t x_u = xbits.uintval(); - uint32_t x_abs = xbits.abs().uintval(); - - // |x| <= 2^-3 - if (LIBC_UNLIKELY(x_abs <= 0x3e80'0000U)) { - // |x| <= 2^-26 - if (LIBC_UNLIKELY(x_abs <= 0x3280'0000U)) { - return static_cast<float>(LIBC_UNLIKELY(x_abs == 0) - ? x - : (x - 0x1.5555555555555p-3 * x * x * x)); - } - - double x_d = x; - double x_sq = x_d * x_d; - // Generated by Sollya with: - // > P = fpminimax(asinh(x)/x, [|0, 2, 4, 6, 8, 10, 12, 14, 16|], [|D...|], - // [0, 2^-2]); - double p = fputil::polyeval( - x_sq, 0.0, -0x1.555555555551ep-3, 0x1.3333333325495p-4, - -0x1.6db6db5a7622bp-5, 0x1.f1c70f82928c6p-6, -0x1.6e893934266b7p-6, - 0x1.1c0b41d3fbe78p-6, -0x1.c0f47810b3c4fp-7, 0x1.2c8602690143dp-7); - return static_cast<float>(fputil::multiply_add(x_d, p, x_d)); - } - - const double SIGN[2] = {1.0, -1.0}; - double x_sign = SIGN[x_u >> 31]; - double x_d = x; - -#ifndef LIBC_MATH_HAS_SKIP_ACCURATE_PASS - // Helper functions to set results for exceptional cases. - auto round_result_slightly_down = [x_sign](float r) -> float { - return fputil::multiply_add(static_cast<float>(x_sign), r, - static_cast<float>(x_sign) * (-0x1.0p-24f)); - }; - auto round_result_slightly_up = [x_sign](float r) -> float { - return fputil::multiply_add(static_cast<float>(x_sign), r, - static_cast<float>(x_sign) * 0x1.0p-24f); - }; - - if (LIBC_UNLIKELY(x_abs >= 0x4bdd'65a5U)) { - if (LIBC_UNLIKELY(xbits.is_inf_or_nan())) { - if (xbits.is_signaling_nan()) { - fputil::raise_except_if_required(FE_INVALID); - return FPBits_t::quiet_nan().get_val(); - } - - return x; - } - - // Exceptional cases when x > 2^24. - switch (x_abs) { - case 0x4bdd65a5: // |x| = 0x1.bacb4ap24f - return round_result_slightly_down(0x1.1e0696p4f); - case 0x4c803f2c: // |x| = 0x1.007e58p26f - return round_result_slightly_down(0x1.2b786cp4f); - case 0x4f8ffb03: // |x| = 0x1.1ff606p32f - return round_result_slightly_up(0x1.6fdd34p4f); - case 0x5c569e88: // |x| = 0x1.ad3d1p57f - return round_result_slightly_up(0x1.45c146p5f); - case 0x5e68984e: // |x| = 0x1.d1309cp61f - return round_result_slightly_up(0x1.5c9442p5f); - case 0x655890d3: // |x| = 0x1.b121a6p75f - return round_result_slightly_down(0x1.a9a3f2p5f); - case 0x65de7ca6: // |x| = 0x1.bcf94cp76f - return round_result_slightly_up(0x1.af66cp5f); - case 0x6eb1a8ec: // |x| = 0x1.6351d8p94f - return round_result_slightly_down(0x1.08b512p6f); - case 0x7997f30a: // |x| = 0x1.2fe614p116f - return round_result_slightly_up(0x1.451436p6f); - } - } else { - // Exceptional cases when x < 2^24. - if (LIBC_UNLIKELY(x_abs == 0x45abaf26)) { - // |x| = 0x1.575e4cp12f - return round_result_slightly_down(0x1.29becap3f); - } - if (LIBC_UNLIKELY(x_abs == 0x49d29048)) { - // |x| = 0x1.a5209p20f - return round_result_slightly_down(0x1.e1b92p3f); - } - } -#else - if (LIBC_UNLIKELY(xbits.is_inf_or_nan())) - return x; -#endif // !LIBC_MATH_HAS_SKIP_ACCURATE_PASS - - // asinh(x) = log(x + sqrt(x^2 + 1)) - return static_cast<float>( - x_sign * log_eval(fputil::multiply_add( - x_d, x_sign, - fputil::sqrt<double>(fputil::multiply_add(x_d, x_d, 1.0))))); -} +LLVM_LIBC_FUNCTION(float, asinhf, (float x)) { return math::asinhf(x); } } // namespace LIBC_NAMESPACE_DECL |