92 lines · cpp
1//===-- Unittests for tanpif ----------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/math/tanpif.h"10#include "test/UnitTest/FPMatcher.h"11#include "test/src/math/sdcomp26094.h"12#include "utils/MPFRWrapper/MPFRUtils.h"13 14using LlvmLibcTanpifTest = LIBC_NAMESPACE::testing::FPTest<float>;15 16using LIBC_NAMESPACE::testing::SDCOMP26094_VALUES;17 18namespace mpfr = LIBC_NAMESPACE::testing::mpfr;19 20TEST_F(LlvmLibcTanpifTest, SpecificBitPatterns) {21 constexpr int N = 38;22 constexpr uint32_t INPUTS[N] = {23 0x3f00'0000U, // x = 0.524 0x461d'd600U, // x = 10101.525 0x3f06'0a92U, // x = pi/626 0x3f3a'dc51U, // x = 0x1.75b8a2p-1f27 0x3f49'0fdbU, // x = pi/428 0x3f86'0a92U, // x = pi/329 0x3fa7'832aU, // x = 0x1.4f0654p+0f30 0x3fc9'0fdbU, // x = pi/231 0x4017'1973U, // x = 0x1.2e32e6p+1f32 0x4049'0fdbU, // x = pi33 0x4096'cbe4U, // x = 0x1.2d97c8p+2f34 0x40c9'0fdbU, // x = 2*pi35 0x433b'7490U, // x = 0x1.76e92p+7f36 0x437c'e5f1U, // x = 0x1.f9cbe2p+7f37 0x4619'9998U, // x = 0x1.33333p+13f38 0x474d'246fU, // x = 0x1.9a48dep+15f39 0x4afd'ece4U, // x = 0x1.fbd9c8p+22f40 0x4c23'32e9U, // x = 0x1.4665d2p+25f41 0x50a3'e87fU, // x = 0x1.47d0fep+34f42 0x5239'47f6U, // x = 0x1.728fecp+37f43 0x53b1'46a6U, // x = 0x1.628d4cp+40f44 0x55ca'fb2aU, // x = 0x1.95f654p+44f45 0x588e'f060U, // x = 0x1.1de0cp+50f46 0x5c07'bcd0U, // x = 0x1.0f79ap+57f47 0x5ebc'fddeU, // x = 0x1.79fbbcp+62f48 0x5fa6'eba7U, // x = 0x1.4dd74ep+64f49 0x61a4'0b40U, // x = 0x1.48168p+68f50 0x6386'134eU, // x = 0x1.0c269cp+72f51 0x6589'8498U, // x = 0x1.13093p+76f52 0x6600'0001U, // x = 0x1.000002p+77f53 0x664e'46e4U, // x = 0x1.9c8dc8p+77f54 0x66b0'14aaU, // x = 0x1.602954p+78f55 0x67a9'242bU, // x = 0x1.524856p+80f56 0x6a19'76f1U, // x = 0x1.32ede2p+85f57 0x6c55'da58U, // x = 0x1.abb4bp+89f58 0x6f79'be45U, // x = 0x1.f37c8ap+95f59 0x7276'69d4U, // x = 0x1.ecd3a8p+101f60 0x7758'4625U, // x = 0x1.b08c4ap+111f61 };62 63 for (int i = 0; i < N; ++i) {64 float x = FPBits(INPUTS[i]).get_val();65 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanpi, x,66 LIBC_NAMESPACE::tanpif(x), 0.5);67 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanpi, -x,68 LIBC_NAMESPACE::tanpif(-x), 0.5);69 }70}71 72// For small values, tanpi(x) is pi * x.73TEST_F(LlvmLibcTanpifTest, SmallValues) {74 float x = FPBits(0x1780'0000U).get_val();75 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanpi, x,76 LIBC_NAMESPACE::tanpif(x), 0.5);77 78 x = FPBits(0x0040'0000U).get_val();79 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanpi, x,80 LIBC_NAMESPACE::tanpif(x), 0.5);81}82 83// SDCOMP-26094: check tanpif in the cases for which the range reducer84// returns values furthest beyond its nominal upper bound of pi/4.85TEST_F(LlvmLibcTanpifTest, SDCOMP_26094) {86 for (uint32_t v : SDCOMP26094_VALUES) {87 float x = FPBits((v)).get_val();88 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanpi, x,89 LIBC_NAMESPACE::tanpif(x), 0.5);90 }91}92