This is the mail archive of the
mailing list for the GCC project.
Re: Vector Extensions to C (SSE2 on X86)
Anyone fixing the documentation, then?
Den 1. aug. 2006 kl. 15.51 skrev Ian Lance Taylor:
Amund Fjellheim <email@example.com> writes:
GCC has some support for vector instructions through typedef'ed types
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
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
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?
It is a documentation failure. gcc's current goal is to implement the
Intel intrinsic functions, providing mmintrin.h and friends:
So, to get pslld, you would use _m_pslld or _m_pslldi, etc.