On Tue, 13 Jul 2021, H.J. Lu wrote: > On Mon, Jul 12, 2021 at 8:59 PM Wang, Pengfei <pengfei.w...@intel.com> wrote: > > > > > 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, are both real part and imaginary part > > returned in %xmm0? Or returned in %xmm0 and %xmm1 respectively? > > Here is the v2 patch to add the missing _Float16 bits. The PDF file is at > > https://gitlab.com/x86-psABIs/i386-ABI/-/wikis/Intel386-psABI
This PDF shows _Complex _Float16 as having a size of 2 bytes (should be 4-byte size, 2-byte alignment). It also seems to change double from 4-byte to 8-byte alignment, which is wrong. And it's inconsistent about whether it covers the long double = double (Android) case - it shows that case for _Complex long double but not for long double itself. -- Joseph S. Myers jos...@codesourcery.com
