zahiraam added a comment. In D109239#3878422 <https://reviews.llvm.org/D109239#3878422>, @ArcsinX wrote:
> It seems for x86_32 case (e.g. with -m32 in command line) there is a > difference between clang and GCC: > clang: `__FLT_EVAL_METHOD__` == 0 > GCC: `__FLT_EVAL_METHOD__` == 2 > > Example: > https://godbolt.org/z/EbY8rPYGn > > I am not sure, is it a correct behavior from clang? For 32-bit x86 targets, GCC defaults to -mfpmath=387 (no SSE). Passing -mfpmath=sse to GCC will use source precision. Clang’s 32-bit x86 targets defaults to using SSE instructions and evaluating at source precision. Clang doesn’t allow -mfpmath=387 unless it’s passed along with -mno-sse which is redundant. Using -m32 (or -mfpmath=387) in combination with -mno-sse will give you GCC’s default behavior. See https://godbolt.org/z/4d8fqzqEs CHANGES SINCE LAST ACTION https://reviews.llvm.org/D109239/new/ https://reviews.llvm.org/D109239 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
