<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/134917>134917</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libc] Rounding Error for cospif16/sinpif16
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            libc
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          michaelrj-google
      </td>
    </tr>
</table>

<pre>
    Example failure from the buildbot:
```
[==========] Running 2 tests from 1 test suite.
[ RUN      ] LlvmLibcSinpif16Test.SpecialNumbers
/home/libc-buildbot/libc-aarch64-ubuntu/libc-aarch64-ubuntu/llvm-project/libc/test/src/math/smoke/sinpif16_test.cpp:20: FAILURE
      Expected: __llvm_libc_20_0_0_git::fputil::test_except( static_cast<int>((1 | 2 | 4 | 8 | 16))) & ((1) ? (1) : static_cast<int>((1 | 2 | 4 | 8 | 16)))
      Which is: 0
To be equal to: (1)
      Which is: 1
[  FAILED  ] LlvmLibcSinpif16Test.SpecialNumbers
[ RUN      ] LlvmLibcSinpif16Test.Integers
[       OK ] LlvmLibcSinpif16Test.Integers (9 us)
Ran 2 tests.  PASS: 1  FAIL: 1
```
Seems like there's a rounding issue.
</pre>
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