This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Vector Extensions to C (SSE2 on X86)


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?


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]