diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt index 3ed77c76709da..4be003c05bf72 100644 --- a/libc/config/linux/x86_64/entrypoints.txt +++ b/libc/config/linux/x86_64/entrypoints.txt @@ -415,6 +415,7 @@ set(TARGET_LIBM_ENTRYPOINTS libc.src.math.exp libc.src.math.exp10 libc.src.math.exp10f + libc.src.math.exp10m1f libc.src.math.exp2 libc.src.math.exp2f libc.src.math.exp2m1f diff --git a/libc/docs/math/index.rst b/libc/docs/math/index.rst index a50e054622e1a..92580cb159275 100644 --- a/libc/docs/math/index.rst +++ b/libc/docs/math/index.rst @@ -292,7 +292,7 @@ Higher Math Functions +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+ | exp10 | |check| | |check| | | |check| | | 7.12.6.2 | F.10.3.2 | +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+ -| exp10m1 | | | | |check| | | 7.12.6.3 | F.10.3.3 | +| exp10m1 | |check| | | | |check| | | 7.12.6.3 | F.10.3.3 | +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+ | exp2 | |check| | |check| | | |check| | | 7.12.6.4 | F.10.3.4 | +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+ diff --git a/libc/newhdrgen/yaml/math.yaml b/libc/newhdrgen/yaml/math.yaml index 3cc4b599c777b..d6669f1e8ffcc 100644 --- a/libc/newhdrgen/yaml/math.yaml +++ b/libc/newhdrgen/yaml/math.yaml @@ -280,6 +280,12 @@ functions: return_type: float arguments: - type: float + - name: exp10m1f + standards: + - stdc + return_type: float + arguments: + - type: float - name: exp10m1f16 standards: - stdc diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td index d1ebc6ffb5821..4fa057da1cf13 100644 --- a/libc/spec/stdc.td +++ b/libc/spec/stdc.td @@ -695,6 +695,7 @@ def StdC : StandardSpec<"stdc"> { FunctionSpec<"exp10f", RetValSpec, [ArgSpec]>, GuardedFunctionSpec<"exp10f16", RetValSpec, [ArgSpec], "LIBC_TYPES_HAS_FLOAT16">, + FunctionSpec<"exp10m1f", RetValSpec, [ArgSpec]>, GuardedFunctionSpec<"exp10m1f16", RetValSpec, [ArgSpec], "LIBC_TYPES_HAS_FLOAT16">, FunctionSpec<"remainder", RetValSpec, [ArgSpec, ArgSpec]>, @@ -1737,7 +1738,6 @@ def StdC : StandardSpec<"stdc"> { ] >; - NamedType StructLconv = NamedType<"struct lconv">; PtrType StructLconvPtr = PtrType; diff --git a/libc/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt index 80c1867d2116f..88cef320cee76 100644 --- a/libc/src/math/CMakeLists.txt +++ b/libc/src/math/CMakeLists.txt @@ -131,6 +131,7 @@ add_math_entrypoint_object(exp10) add_math_entrypoint_object(exp10f) add_math_entrypoint_object(exp10f16) +add_math_entrypoint_object(exp10m1f) add_math_entrypoint_object(exp10m1f16) add_math_entrypoint_object(expm1) diff --git a/libc/src/math/exp10m1f.h b/libc/src/math/exp10m1f.h new file mode 100644 index 0000000000000..fcb9f77795da3 --- /dev/null +++ b/libc/src/math/exp10m1f.h @@ -0,0 +1,20 @@ +//===-- Implementation header for exp10m1f ----------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIBC_SRC_MATH_EXP10M1F_H +#define LLVM_LIBC_SRC_MATH_EXP10M1F_H + +#include "src/__support/macros/config.h" + +namespace LIBC_NAMESPACE_DECL { + +float exp10m1f(float x); + +} // namespace LIBC_NAMESPACE_DECL + +#endif // LLVM_LIBC_SRC_MATH_EXP10M1F_H diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt index ca27759d3212f..93780a79a8e2f 100644 --- a/libc/src/math/generic/CMakeLists.txt +++ b/libc/src/math/generic/CMakeLists.txt @@ -359,7 +359,7 @@ add_header_library( libc.src.__support.FPUtil.fp_bits libc.src.__support.FPUtil.polyeval libc.src.__support.FPUtil.nearest_integer - libc.src.__support.common + libc.src.__support.common ) add_header_library( @@ -1569,6 +1569,7 @@ add_entrypoint_object( .explogxf libc.src.errno.errno libc.src.__support.common + libc.src.__support.FPUtil.except_value_utils libc.src.__support.FPUtil.fenv_impl libc.src.__support.FPUtil.fp_bits libc.src.__support.FPUtil.multiply_add @@ -1686,6 +1687,27 @@ add_entrypoint_object( -O3 ) +add_entrypoint_object( + exp10m1f + SRCS + exp10m1f.cpp + HDRS + ../exp10m1f.h + DEPENDS + .explogxf + libc.src.errno.errno + libc.src.__support.common + libc.src.__support.FPUtil.except_value_utils + libc.src.__support.FPUtil.fenv_impl + libc.src.__support.FPUtil.fp_bits + libc.src.__support.FPUtil.multiply_add + libc.src.__support.FPUtil.polyeval + libc.src.__support.FPUtil.rounding_mode + libc.src.__support.macros.optimization + COMPILE_OPTIONS + -O3 +) + add_entrypoint_object( exp10m1f16 SRCS diff --git a/libc/src/math/generic/exp10m1f.cpp b/libc/src/math/generic/exp10m1f.cpp new file mode 100644 index 0000000000000..c0e302eea7b08 --- /dev/null +++ b/libc/src/math/generic/exp10m1f.cpp @@ -0,0 +1,216 @@ +//===-- Implementation of exp10m1f function -------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/math/exp10m1f.h" +#include "src/__support/FPUtil/FEnvImpl.h" +#include "src/__support/FPUtil/FPBits.h" +#include "src/__support/FPUtil/PolyEval.h" +#include "src/__support/FPUtil/except_value_utils.h" +#include "src/__support/FPUtil/multiply_add.h" +#include "src/__support/FPUtil/rounding_mode.h" +#include "src/__support/common.h" +#include "src/__support/macros/config.h" +#include "src/__support/macros/optimization.h" +#include "src/errno/libc_errno.h" + +#include "explogxf.h" + +namespace LIBC_NAMESPACE_DECL { + +static constexpr size_t N_EXCEPTS_LO = 11; + +static constexpr fputil::ExceptValues EXP10M1F_EXCEPTS_LO = + {{ + // x = 0x1.0fe54ep-11, exp10m1f(x) = 0x1.3937eep-10 (RZ) + {0x3a07'f2a7U, 0x3a9c'9bf7U, 1U, 0U, 1U}, + // x = 0x1.80e6eap-11, exp10m1f(x) = 0x1.bb8272p-10 (RZ) + {0x3a40'7375U, 0x3add'c139U, 1U, 0U, 1U}, + // x = -0x1.2a33bcp-51, exp10m1f(x) = -0x1.57515ep-50 (RZ) + {0xa615'19deU, 0xa6ab'a8afU, 0U, 1U, 0U}, + // x = -0x0p+0, exp10m1f(x) = -0x0p+0 (RZ) + {0x8000'0000U, 0x8000'0000U, 0U, 0U, 0U}, + // x = -0x1.b59e08p-31, exp10m1f(x) = -0x1.f7d356p-30 (RZ) + {0xb05a'cf04U, 0xb0fb'e9abU, 0U, 1U, 1U}, + // x = -0x1.bf342p-12, exp10m1f(x) = -0x1.014e02p-10 (RZ) + {0xb9df'9a10U, 0xba80'a701U, 0U, 1U, 0U}, + // x = -0x1.6207fp-11, exp10m1f(x) = -0x1.9746cap-10 (RZ) + {0xba31'03f8U, 0xbacb'a365U, 0U, 1U, 1U}, + // x = -0x1.bd0c66p-11, exp10m1f(x) = -0x1.ffe168p-10 (RZ) + {0xba5e'8633U, 0xbaff'f0b4U, 0U, 1U, 1U}, + // x = -0x1.ffd84cp-10, exp10m1f(x) = -0x1.25faf2p-8 (RZ) + {0xbaff'ec26U, 0xbb92'fd79U, 0U, 1U, 0U}, + // x = -0x1.a74172p-9, exp10m1f(x) = -0x1.e57be2p-8 (RZ) + {0xbb53'a0b9U, 0xbbf2'bdf1U, 0U, 1U, 1U}, + // x = -0x1.cb694cp-9, exp10m1f(x) = -0x1.0764e4p-7 (RZ) + {0xbb65'b4a6U, 0xbc03'b272U, 0U, 1U, 0U}, + }}; + +static constexpr size_t N_EXCEPTS_HI = 19; + +static constexpr fputil::ExceptValues EXP10M1F_EXCEPTS_HI = + {{ + // (input, RZ output, RU offset, RD offset, RN offset) + // x = 0x1.8d31eep-8, exp10m1f(x) = 0x1.cc7e4cp-7 (RZ) + {0x3bc6'98f7U, 0x3c66'3f26U, 1U, 0U, 1U}, + // x = 0x1.915fcep-8, exp10m1f(x) = 0x1.d15f72p-7 (RZ) + {0x3bc8'afe7U, 0x3c68'afb9U, 1U, 0U, 0U}, + // x = 0x1.bcf982p-8, exp10m1f(x) = 0x1.022928p-6 (RZ) + {0x3bde'7cc1U, 0x3c81'1494U, 1U, 0U, 1U}, + // x = 0x1.99ff0ap-7, exp10m1f(x) = 0x1.dee416p-6 (RZ) + {0x3c4c'ff85U, 0x3cef'720bU, 1U, 0U, 0U}, + // x = 0x1.75ea14p-6, exp10m1f(x) = 0x1.b9ff16p-5 (RZ) + {0x3cba'f50aU, 0x3d5c'ff8bU, 1U, 0U, 0U}, + // x = 0x1.f81b64p-6, exp10m1f(x) = 0x1.2cb6bcp-4 (RZ) + {0x3cfc'0db2U, 0x3d96'5b5eU, 1U, 0U, 0U}, + // x = 0x1.fafecp+3, exp10m1f(x) = 0x1.8c880ap+52 (RZ) + {0x417d'7f60U, 0x59c6'4405U, 1U, 0U, 0U}, + // x = -0x1.3bf094p-8, exp10m1f(x) = -0x1.69ba4ap-7 (RZ) + {0xbb9d'f84aU, 0xbc34'dd25U, 0U, 1U, 0U}, + // x = -0x1.4558bcp-8, exp10m1f(x) = -0x1.746fb8p-7 (RZ) + {0xbba2'ac5eU, 0xbc3a'37dcU, 0U, 1U, 1U}, + // x = -0x1.4bb43p-8, exp10m1f(x) = -0x1.7babe4p-7 (RZ) + {0xbba5'da18U, 0xbc3d'd5f2U, 0U, 1U, 1U}, + // x = -0x1.776cc8p-8, exp10m1f(x) = -0x1.ad62c4p-7 (RZ) + {0xbbbb'b664U, 0xbc56'b162U, 0U, 1U, 0U}, + // x = -0x1.f024cp-8, exp10m1f(x) = -0x1.1b20d6p-6 (RZ) + {0xbbf8'1260U, 0xbc8d'906bU, 0U, 1U, 1U}, + // x = -0x1.f510eep-8, exp10m1f(x) = -0x1.1de9aap-6 (RZ) + {0xbbfa'8877U, 0xbc8e'f4d5U, 0U, 1U, 0U}, + // x = -0x1.0b43c4p-7, exp10m1f(x) = -0x1.30d418p-6 (RZ) + {0xbc05'a1e2U, 0xbc98'6a0cU, 0U, 1U, 0U}, + // x = -0x1.245ee4p-7, exp10m1f(x) = -0x1.4d2b86p-6 (RZ) + {0xbc12'2f72U, 0xbca6'95c3U, 0U, 1U, 0U}, + // x = -0x1.f9f2dap-7, exp10m1f(x) = -0x1.1e2186p-5 (RZ) + {0xbc7c'f96dU, 0xbd0f'10c3U, 0U, 1U, 0U}, + // x = -0x1.08e42p-6, exp10m1f(x) = -0x1.2b5c4p-5 (RZ) + {0xbc84'7210U, 0xbd15'ae20U, 0U, 1U, 1U}, + // x = -0x1.0cdc44p-5, exp10m1f(x) = -0x1.2a2152p-4 (RZ) + {0xbd06'6e22U, 0xbd95'10a9U, 0U, 1U, 1U}, + // x = -0x1.ca4322p-5, exp10m1f(x) = -0x1.ef073p-4 (RZ) + {0xbd65'2191U, 0xbdf7'8398U, 0U, 1U, 1U}, + }}; + +LLVM_LIBC_FUNCTION(float, exp10m1f, (float x)) { + using FPBits = fputil::FPBits; + FPBits xbits(x); + + uint32_t x_u = xbits.uintval(); + uint32_t x_abs = x_u & 0x7fff'ffffU; + + // When x >= log10(2^128), or x is nan + if (LIBC_UNLIKELY(xbits.is_pos() && x_u >= 0x421a'209bU)) { + if (xbits.is_finite()) { + int rounding = fputil::quick_get_round(); + if (rounding == FE_DOWNWARD || rounding == FE_TOWARDZERO) + return FPBits::max_normal().get_val(); + + fputil::set_errno_if_required(ERANGE); + fputil::raise_except_if_required(FE_OVERFLOW); + } + + // x >= log10(2^128) and 10^x - 1 rounds to +inf, or x is +inf or nan + return x + FPBits::inf().get_val(); + } + + // When |x| <= log10(2) * 2^(-6) + if (LIBC_UNLIKELY(x_abs <= 0x3b9a'209bU)) { + if (auto r = EXP10M1F_EXCEPTS_LO.lookup(x_u); LIBC_UNLIKELY(r.has_value())) + return r.value(); + + double dx = x; + double dx_sq = dx * dx; + double c0 = dx * Exp10Base::COEFFS[0]; + double c1 = + fputil::multiply_add(dx, Exp10Base::COEFFS[2], Exp10Base::COEFFS[1]); + double c2 = + fputil::multiply_add(dx, Exp10Base::COEFFS[4], Exp10Base::COEFFS[3]); + // 10^dx - 1 ~ (1 + COEFFS[0] * dx + ... + COEFFS[4] * dx^5) - 1 + // = COEFFS[0] * dx + ... + COEFFS[4] * dx^5 + return static_cast(fputil::polyeval(dx_sq, c0, c1, c2)); + } + + // When x <= log10(2^-25), or x is nan + if (LIBC_UNLIKELY(x_u >= 0xc0f0d2f1)) { + // exp10m1(-inf) = -1 + if (xbits.is_inf()) + return -1.0f; + // exp10m1(nan) = nan + if (xbits.is_nan()) + return x; + + int rounding = fputil::quick_get_round(); + if (rounding == FE_UPWARD || rounding == FE_TOWARDZERO || + (rounding == FE_TONEAREST && x_u == 0xc0f0d2f1)) + return -0x1.ffff'fep-1f; // -1.0f + 0x1.0p-24f + + fputil::set_errno_if_required(ERANGE); + fputil::raise_except_if_required(FE_UNDERFLOW); + return -1.0f; + } + + // Exact outputs when x = 1, 2, ..., 10. + // Quick check mask: 0x800f'ffffU = ~(bits of 1.0f | ... | bits of 10.0f) + if (LIBC_UNLIKELY((x_u & 0x800f'ffffU) == 0)) { + switch (x_u) { + case 0x3f800000U: // x = 1.0f + return 9.0f; + case 0x40000000U: // x = 2.0f + return 99.0f; + case 0x40400000U: // x = 3.0f + return 999.0f; + case 0x40800000U: // x = 4.0f + return 9'999.0f; + case 0x40a00000U: // x = 5.0f + return 99'999.0f; + case 0x40c00000U: // x = 6.0f + return 999'999.0f; + case 0x40e00000U: // x = 7.0f + return 9'999'999.0f; + case 0x41000000U: { // x = 8.0f + int rounding = fputil::quick_get_round(); + if (rounding == FE_UPWARD || rounding == FE_TONEAREST) + return 100'000'000.0f; + return 99'999'992.0f; + } + case 0x41100000U: { // x = 9.0f + int rounding = fputil::quick_get_round(); + if (rounding == FE_UPWARD || rounding == FE_TONEAREST) + return 1'000'000'000.0f; + return 999'999'936.0f; + } + case 0x41200000U: { // x = 10.0f + int rounding = fputil::quick_get_round(); + if (rounding == FE_UPWARD || rounding == FE_TONEAREST) + return 10'000'000'000.0f; + return 9'999'998'976.0f; + } + } + } + + if (auto r = EXP10M1F_EXCEPTS_HI.lookup(x_u); LIBC_UNLIKELY(r.has_value())) + return r.value(); + + // Range reduction: 10^x = 2^(mid + hi) * 10^lo + // rr = (2^(mid + hi), lo) + auto rr = exp_b_range_reduc(x); + + // The low part is approximated by a degree-5 minimax polynomial. + // 10^lo ~ 1 + COEFFS[0] * lo + ... + COEFFS[4] * lo^5 + double lo_sq = rr.lo * rr.lo; + double c0 = fputil::multiply_add(rr.lo, Exp10Base::COEFFS[0], 1.0); + double c1 = + fputil::multiply_add(rr.lo, Exp10Base::COEFFS[2], Exp10Base::COEFFS[1]); + double c2 = + fputil::multiply_add(rr.lo, Exp10Base::COEFFS[4], Exp10Base::COEFFS[3]); + double exp10_lo = fputil::polyeval(lo_sq, c0, c1, c2); + // 10^x - 1 = 2^(mid + hi) * 10^lo - 1 + // ~ mh * exp10_lo - 1 + return static_cast(fputil::multiply_add(exp10_lo, rr.mh, -1.0)); +} + +} // namespace LIBC_NAMESPACE_DECL diff --git a/libc/src/math/generic/explogxf.h b/libc/src/math/generic/explogxf.h index f3f50c21aacce..651524a165f03 100644 --- a/libc/src/math/generic/explogxf.h +++ b/libc/src/math/generic/explogxf.h @@ -159,12 +159,12 @@ template LIBC_INLINE exp_b_reduc_t exp_b_range_reduc(float x) { int k = static_cast(kd); // hi = floor(kd * 2^(-MID_BITS)) // exp_hi = shift hi to the exponent field of double precision. - int64_t exp_hi = static_cast((k >> Base::MID_BITS)) - << fputil::FPBits::FRACTION_LEN; + uint64_t exp_hi = static_cast(k >> Base::MID_BITS) + << fputil::FPBits::FRACTION_LEN; // mh = 2^hi * 2^mid // mh_bits = bit field of mh - int64_t mh_bits = Base::EXP_2_MID[k & Base::MID_MASK] + exp_hi; - double mh = fputil::FPBits(uint64_t(mh_bits)).get_val(); + uint64_t mh_bits = Base::EXP_2_MID[k & Base::MID_MASK] + exp_hi; + double mh = fputil::FPBits(mh_bits).get_val(); // dx = lo = x - (hi + mid) * log(2) double dx = fputil::multiply_add( kd, Base::M_LOGB_2_LO, fputil::multiply_add(kd, Base::M_LOGB_2_HI, xd)); diff --git a/libc/test/UnitTest/FPMatcher.h b/libc/test/UnitTest/FPMatcher.h index 55fe73cd2f1ac..9f2bae3279208 100644 --- a/libc/test/UnitTest/FPMatcher.h +++ b/libc/test/UnitTest/FPMatcher.h @@ -174,7 +174,8 @@ template struct FPTest : public Test { LIBC_NAMESPACE::cpp::numeric_limits::max(); static constexpr T zero = FPBits::zero(Sign::POS).get_val(); static constexpr T neg_zero = FPBits::zero(Sign::NEG).get_val(); - static constexpr T aNaN = FPBits::quiet_nan().get_val(); + static constexpr T aNaN = FPBits::quiet_nan(Sign::POS).get_val(); + static constexpr T neg_aNaN = FPBits::quiet_nan(Sign::NEG).get_val(); static constexpr T sNaN = FPBits::signaling_nan().get_val(); static constexpr T inf = FPBits::inf(Sign::POS).get_val(); static constexpr T neg_inf = FPBits::inf(Sign::NEG).get_val(); diff --git a/libc/test/src/math/CMakeLists.txt b/libc/test/src/math/CMakeLists.txt index b46ef4028915b..d120f8e2fab21 100644 --- a/libc/test/src/math/CMakeLists.txt +++ b/libc/test/src/math/CMakeLists.txt @@ -1084,6 +1084,21 @@ add_fp_unittest( libc.src.math.exp10m1f16 ) +add_fp_unittest( + exp10m1f_test + NEED_MPFR + SUITE + libc-math-unittests + SRCS + exp10m1f_test.cpp + DEPENDS + libc.hdr.math_macros + libc.src.errno.errno + libc.src.math.exp10m1f + libc.src.__support.CPP.array + libc.src.__support.FPUtil.fp_bits +) + add_fp_unittest( copysign_test SUITE diff --git a/libc/test/src/math/exhaustive/CMakeLists.txt b/libc/test/src/math/exhaustive/CMakeLists.txt index 6c10ea422109e..423c3b7a8bfd1 100644 --- a/libc/test/src/math/exhaustive/CMakeLists.txt +++ b/libc/test/src/math/exhaustive/CMakeLists.txt @@ -201,6 +201,21 @@ add_fp_unittest( -lpthread ) +add_fp_unittest( + exp10m1f_test + NO_RUN_POSTBUILD + NEED_MPFR + SUITE + libc_math_exhaustive_tests + SRCS + exp10m1f_test.cpp + DEPENDS + .exhaustive_test + libc.src.math.exp10m1f + LINK_LIBRARIES + -lpthread +) + add_fp_unittest( expm1f_test NO_RUN_POSTBUILD diff --git a/libc/test/src/math/exhaustive/exp10m1f_test.cpp b/libc/test/src/math/exhaustive/exp10m1f_test.cpp new file mode 100644 index 0000000000000..b9b2290f8b570 --- /dev/null +++ b/libc/test/src/math/exhaustive/exp10m1f_test.cpp @@ -0,0 +1,33 @@ +//===-- Exhaustive test for exp10m1f --------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "exhaustive_test.h" +#include "src/math/exp10m1f.h" +#include "utils/MPFRWrapper/MPFRUtils.h" + +namespace mpfr = LIBC_NAMESPACE::testing::mpfr; + +using LlvmLibcExp10m1fExhaustiveTest = + LlvmLibcUnaryOpExhaustiveMathTest; + +// Range: [0, Inf]; +static constexpr uint32_t POS_START = 0x0000'0000U; +static constexpr uint32_t POS_STOP = 0x7f80'0000U; + +TEST_F(LlvmLibcExp10m1fExhaustiveTest, PostiveRange) { + test_full_range_all_roundings(POS_START, POS_STOP); +} + +// Range: [-Inf, 0]; +static constexpr uint32_t NEG_START = 0x8000'0000U; +static constexpr uint32_t NEG_STOP = 0xff80'0000U; + +TEST_F(LlvmLibcExp10m1fExhaustiveTest, NegativeRange) { + test_full_range_all_roundings(NEG_START, NEG_STOP); +} diff --git a/libc/test/src/math/exp10m1f_test.cpp b/libc/test/src/math/exp10m1f_test.cpp new file mode 100644 index 0000000000000..cc960321175cb --- /dev/null +++ b/libc/test/src/math/exp10m1f_test.cpp @@ -0,0 +1,97 @@ +//===-- Unittests for exp10m1f --------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "hdr/math_macros.h" +#include "src/__support/CPP/array.h" +#include "src/errno/libc_errno.h" +#include "src/math/exp10m1f.h" +#include "test/UnitTest/FPMatcher.h" +#include "test/UnitTest/Test.h" +#include "utils/MPFRWrapper/MPFRUtils.h" + +#include + +using LlvmLibcExp10m1fTest = LIBC_NAMESPACE::testing::FPTest; + +namespace mpfr = LIBC_NAMESPACE::testing::mpfr; + +TEST_F(LlvmLibcExp10m1fTest, TrickyInputs) { + constexpr LIBC_NAMESPACE::cpp::array INPUTS = { + // EXP10M1F_EXCEPTS_LO + 0x1.0fe54ep-11f, + 0x1.80e6eap-11f, + -0x1.2a33bcp-51f, + -0x0p+0f, + -0x1.b59e08p-31f, + -0x1.bf342p-12f, + -0x1.6207fp-11f, + -0x1.bd0c66p-11f, + -0x1.ffd84cp-10f, + -0x1.a74172p-9f, + -0x1.cb694cp-9f, + // EXP10M1F_EXCEPTS_HI + 0x1.8d31eep-8f, + 0x1.915fcep-8f, + 0x1.bcf982p-8f, + 0x1.99ff0ap-7f, + 0x1.75ea14p-6f, + 0x1.f81b64p-6f, + 0x1.fafecp+3f, + -0x1.3bf094p-8f, + -0x1.4558bcp-8f, + -0x1.4bb43p-8f, + -0x1.776cc8p-8f, + -0x1.f024cp-8f, + -0x1.f510eep-8f, + -0x1.0b43c4p-7f, + -0x1.245ee4p-7f, + -0x1.f9f2dap-7f, + -0x1.08e42p-6f, + -0x1.0cdc44p-5f, + -0x1.ca4322p-5f, + // Exceptional integers. + 8.0f, + 9.0f, + 10.0f, + // Overflow boundaries. + 0x1.344134p+5f, + 0x1.344136p+5f, + 0x1.344138p+5f, + // Underflow boundaries. + -0x1.e1a5e0p+2f, + -0x1.e1a5e2p+2f, + -0x1.e1a5e4p+2f, + }; + + for (float x : INPUTS) { + LIBC_NAMESPACE::libc_errno = 0; + EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp10m1, x, + LIBC_NAMESPACE::exp10m1f(x), 0.5); + } +} + +TEST_F(LlvmLibcExp10m1fTest, InFloatRange) { + constexpr uint32_t COUNT = 100'000; + constexpr uint32_t STEP = UINT32_MAX / COUNT; + for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) { + float x = FPBits(v).get_val(); + if (isnan(x) || isinf(x)) + continue; + LIBC_NAMESPACE::libc_errno = 0; + float result = LIBC_NAMESPACE::exp10m1f(x); + + // If the computation resulted in an error or did not produce valid result + // in the single-precision floating point range, then ignore comparing with + // MPFR result as MPFR can still produce valid results because of its + // wider precision. + if (isnan(result) || isinf(result) || LIBC_NAMESPACE::libc_errno != 0) + continue; + ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp10m1, x, + LIBC_NAMESPACE::exp10m1f(x), 0.5); + } +} diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt index 269e92c590062..1da6f377a1deb 100644 --- a/libc/test/src/math/smoke/CMakeLists.txt +++ b/libc/test/src/math/smoke/CMakeLists.txt @@ -1259,6 +1259,17 @@ add_fp_unittest( libc.src.__support.FPUtil.cast ) +add_fp_unittest( + exp10m1f_test + SUITE + libc-math-smoke-tests + SRCS + exp10m1f_test.cpp + DEPENDS + libc.src.errno.errno + libc.src.math.exp10m1f +) + add_fp_unittest( copysign_test SUITE diff --git a/libc/test/src/math/smoke/exp10m1f_test.cpp b/libc/test/src/math/smoke/exp10m1f_test.cpp new file mode 100644 index 0000000000000..9c65a38425d77 --- /dev/null +++ b/libc/test/src/math/smoke/exp10m1f_test.cpp @@ -0,0 +1,59 @@ +//===-- Unittests for exp10m1f --------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/errno/libc_errno.h" +#include "src/math/exp10m1f.h" +#include "test/UnitTest/FPMatcher.h" +#include "test/UnitTest/Test.h" + +using LlvmLibcExp10m1fTest = LIBC_NAMESPACE::testing::FPTest; + +TEST_F(LlvmLibcExp10m1fTest, SpecialNumbers) { + LIBC_NAMESPACE::libc_errno = 0; + + EXPECT_EQ(FPBits(aNaN).uintval(), + FPBits(LIBC_NAMESPACE::exp10m1f(aNaN)).uintval()); + EXPECT_EQ(FPBits(neg_aNaN).uintval(), + FPBits(LIBC_NAMESPACE::exp10m1f(neg_aNaN)).uintval()); + EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::exp10m1f(inf)); + EXPECT_FP_EQ_ALL_ROUNDING(-1.0f, LIBC_NAMESPACE::exp10m1f(neg_inf)); + EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp10m1f(zero)); + EXPECT_FP_EQ_ALL_ROUNDING(neg_zero, LIBC_NAMESPACE::exp10m1f(neg_zero)); + + EXPECT_FP_EQ_ALL_ROUNDING(9.0f, LIBC_NAMESPACE::exp10m1f(1.0f)); + EXPECT_FP_EQ_ALL_ROUNDING(99.0f, LIBC_NAMESPACE::exp10m1f(2.0f)); + EXPECT_FP_EQ_ALL_ROUNDING(999.0f, LIBC_NAMESPACE::exp10m1f(3.0f)); +} + +TEST_F(LlvmLibcExp10m1fTest, Overflow) { + LIBC_NAMESPACE::libc_errno = 0; + + EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp10m1f(0x1.fffffep+127f), + FE_OVERFLOW); + EXPECT_MATH_ERRNO(ERANGE); + + EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp10m1f(0x1.344136p+5), + FE_OVERFLOW); + EXPECT_MATH_ERRNO(ERANGE); + + EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp10m1f(0x1.344138p+5), + FE_OVERFLOW); + EXPECT_MATH_ERRNO(ERANGE); +} + +TEST_F(LlvmLibcExp10m1fTest, Underflow) { + LIBC_NAMESPACE::libc_errno = 0; + + EXPECT_FP_EQ_WITH_EXCEPTION(-1.0f, LIBC_NAMESPACE::exp10m1f(-max_normal), + FE_UNDERFLOW); + EXPECT_MATH_ERRNO(ERANGE); + + EXPECT_FP_EQ_WITH_EXCEPTION(-1.0f, LIBC_NAMESPACE::exp10m1f(-0x1.e1a5e4p+2f), + FE_UNDERFLOW); + EXPECT_MATH_ERRNO(ERANGE); +}