It seems Clang doesn't support -fexcess-precision=xxx:
https://github.com/llvm/llvm-project/blob/main/clang/test/Driver/clang_f_opts.c#L403
Thanks
Pengfei
-Original Message-
From: Hongtao Liu
Sent: Thursday, July 15, 2021 2:35 PM
To: Wang, Pengfei
Cc: Craig Topper ; Jakub Jelinek ;
* Clang for AArch64 promotes each individual operation and rounds
immediately afterwards. https://godbolt.org/z/qzGfv6nvo note the fcvts between
the two fadd operations. It's implemented in the LLVM backend where we can't
see what was originally a single expression.
Yes, but this is not
Hi H.J.,
Our LLVM implementation currently use %xmm0 for both _Complex's real part and
imaginary part. Do we have special reason to use two registers?
We are using one register on X64. Considering the performance, especially the
register pressure, should it be better to use one register for
> Return _Float16 and _Complex _Float16 values in %xmm0/%xmm1 registers.
Can you please explain the behavior here? Is there difference between _Float16
and _Complex _Float16 when return? I.e.,
1, In which case will _Float16 values return in both %xmm0 and %xmm1?
2, For a single _Float16 value,
