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Part of #93566.
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This is step 4 of
https://discourse.llvm.org/t/rfc-customizable-namespace-to-allow-testing-the-libc-when-the-system-libc-is-also-llvms-libc/73079
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Implement double precision FMA (Fused Multiply-Add) for targets without
FMA instructions using __uint128_t to store the intermediate results.
Reviewed By: michaelrj, sivachandra
Differential Revision: https://reviews.llvm.org/D124495
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Apply the formatting rules that were applied to the libc/src directory
to the libc/test directory, as well as the files in libc/utils that are
included by the tests. This does not include automated enforcement.
Reviewed By: sivachandra, lntue
Differential Revision: https://reviews.llvm.org/D116127
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The current generic implementation of the fmaf function has been moved
to the FPUtil directory. This allows one use the fma operation from
implementations of other math functions like the trignometric functions
without depending on/requiring the fma/fmaf/fmal function targets. If
this pattern ends being convenient, we will switch all generic math
implementations to this pattern.
Reviewed By: lntue
Differential Revision: https://reviews.llvm.org/D100811
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