SSE types and structures

Jan Hubicka
Fri Jun 14 05:16:00 GMT 2002

> On Thu, Jun 13, 2002 at 10:24:21AM -0700, Richard Henderson wrote:
> > You should probably look at TREE_CODE == REAL_TYPE and 
> > COMPLEX_TYPE instead of TYPE_MODE.
> Also, long long used to be 32-bit aligned.
I got that overnight too.  Things are even more tricky...

I guess we want to 32bit align DFmode, DImode, XFmode and their complex
variants, but not TFmode, SSE modes and MMX modes.

Unfortunately __m64 is typdefed to long long.  This makes problems for
x86-64 ABI, as then it will be passed in the integer register, instead
of memory, as specified.  What kind of breakage can cause if I retype it
to let say... V8QI?

> r~

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