[PATCH] D115441: [X86][MS] Add 80bit long double support for Windows

Mon Dec 13 03:27:18 PST 2021

mstorsjo added a comment.

In D115441#3188172 <https://reviews.llvm.org/D115441#3188172>, @pengfei wrote:

>> In GCC on Windows (and clang in mingw mode), long double is always 80 bit on x86. (On i386, sizeof(long double) == 12, while on x86_64 it's 16.)
>
> How about the alignment? I can see on the i386 Linux case, the alignment is 4, I assume it is also 4 for GCC on Windows, right?

Yes, it's 4 for i386 in GCC on Windows too (and Clang in mingw mode). For x86_64, both sizeof and alignof are 16.

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  https://reviews.llvm.org/D115441/new/

https://reviews.llvm.org/D115441