Den 1. aug. 2006 kl. 20.51 skrev Ian Lance Taylor:
Amund Fjellheim <[EMAIL PROTECTED]> writes:
Anyone fixing the documentation, then?
Volunteers are always welcome.
Ian
I would but I don't think I know enough about what GCC supports and
not. It would be better if those who do the changes make sure the
documentation fits, wouldn't it? If I did the documentation, it'd be
inaccurate. Features without documentation are kind of pointless to
the rest of us.
Audun
Den 1. aug. 2006 kl. 15.51 skrev Ian Lance Taylor:
Amund Fjellheim <[EMAIL PROTECTED]> writes:
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?
It is a documentation failure. gcc's current goal is to
implement the
Intel intrinsic functions, providing mmintrin.h and friends:
http://www.intel.com/cd/ids/developer/asmo-na/eng/59644.htm
So, to get pslld, you would use _m_pslld or _m_pslldi, etc.
Ian
