GCC has some support for vector instructions through typedef'ed types
like this:
typedef int v4si __attribute__ ((vector_size (16)));
Some normal C operators can be done on these and there are some
platform specific built in functions. The X86 functions are listed at
http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/X86-Built_002din-
Functions.html#X86-Built_002din-Functions , but there are lots of
SSE2 instructions missing. Why? I don't see how it could be so hard
to implement
v4si __builtin_ia32_pslld(v4si, int)
and so on, when so many other SSE and SSE2 instructions are there.
Also, why aren't they available for C++ programs compiled with g++?
Will these things be fixed in future releases of gcc? Anyone know
something about the status on this?
