[all-commits] [llvm/llvm-project] fd4139: [libc][math] Add float-only option for atan2f. (#1...

[lntue via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fd41393e2e6a32a7fcacdd0779f70964689d01ec
      https://github.com/llvm/llvm-project/commit/fd41393e2e6a32a7fcacdd0779f70964689d01ec
  Author: lntue <lntue at google.com>
  Date:   2025-02-11 (Tue, 11 Feb 2025)

  Changed paths:
    M libc/src/__support/FPUtil/double_double.h
    M libc/src/__support/macros/optimization.h
    M libc/src/math/generic/CMakeLists.txt
    M libc/src/math/generic/atan2f.cpp
    A libc/src/math/generic/atan2f_float.h
    M libc/src/math/generic/pow.cpp
    M libc/src/math/generic/range_reduction_double_fma.h
    M libc/src/math/generic/range_reduction_double_nofma.h

  Log Message:
  -----------
  [libc][math] Add float-only option for atan2f. (#122979)

For targets that have single precision FPU but not double precision FPU
such as Cortex M4, only using float-float in the intermediate
computations might reduce the code size compared to using double. In
this case, when the exact pass is skipped, the float-only option for
atan2f implemented in this PR reduces the code size of this function by
~1 KB compared to the double precision version.



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