1 //===-- Unittests for sin -------------------------------------------------===//
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-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "src/__support/FPUtil/FPBits.h"
10 #include "src/math/sin.h"
11 #include "utils/MPFRWrapper/MPFRUtils.h"
12 #include "utils/UnitTest/FPMatcher.h"
13 #include "utils/UnitTest/Test.h"
14 
15 #include <math.h>
16 
17 namespace mpfr = __llvm_libc::testing::mpfr;
18 
19 DECLARE_SPECIAL_CONSTANTS(double)
20 
21 TEST(LlvmLibcSinTest, Range) {
22   static constexpr double _2pi = 6.283185307179586;
23   constexpr UIntType count = 10000000;
24   constexpr UIntType step = UIntType(-1) / count;
25   for (UIntType i = 0, v = 0; i <= count; ++i, v += step) {
26     double x = double(FPBits(v));
27     // TODO: Expand the range of testing after range reduction is implemented.
28     if (isnan(x) || isinf(x) || x > _2pi || x < -_2pi)
29       continue;
30 
31     ASSERT_MPFR_MATCH(mpfr::Operation::Sin, x, __llvm_libc::sin(x), 1.0);
32   }
33 }
34