[libc-commits] [libc] [libc] Float80 Emulation in LLVM libc (PR #211350)

via libc-commits libc-commits at lists.llvm.org
Thu Jul 30 08:03:25 PDT 2026


github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- libc/src/__support/FPUtil/float80.h libc/test/src/__support/FPUtil/float80_test.cpp libc/src/__support/CPP/type_traits/is_floating_point.h libc/src/__support/FPUtil/FPBits.h libc/src/__support/macros/properties/types.h --diff_from_common_commit
``````````

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in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
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View the diff from clang-format here.
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``````````diff
diff --git a/libc/src/__support/FPUtil/FPBits.h b/libc/src/__support/FPUtil/FPBits.h
index 41a87796c..783e2fe0d 100644
--- a/libc/src/__support/FPUtil/FPBits.h
+++ b/libc/src/__support/FPUtil/FPBits.h
@@ -127,11 +127,11 @@ template <> struct FPLayout<FPType::IEEE754_Binary128> {
 };
 
 template <> struct FPLayout<FPType::X86_Binary80> {
-// #if __SIZEOF_LONG_DOUBLE__ == 12
-//   using StorageType = UInt<__SIZEOF_LONG_DOUBLE__ * CHAR_BIT>;
-// #else
+  // #if __SIZEOF_LONG_DOUBLE__ == 12
+  //   using StorageType = UInt<__SIZEOF_LONG_DOUBLE__ * CHAR_BIT>;
+  // #else
   using StorageType = UInt128;
-// #endif
+  // #endif
   LIBC_INLINE_VAR static constexpr int SIGN_LEN = 1;
   LIBC_INLINE_VAR static constexpr int EXP_LEN = 15;
   LIBC_INLINE_VAR static constexpr int SIG_LEN = 64;

``````````

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https://github.com/llvm/llvm-project/pull/211350


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