[Bug c/38836] New: Documentation for x86 builtins is outdated

["npl at chello dot at" <gcc-bugzilla at gcc dot gnu dot org>]

The documentation for builtin functions need a serious overhaul, trying to use
several builtins as documented will result in the linker complaining about
missing functions. As reference (I`m not sure how accurate this is) take this
post: http://www.mail-archive.com/gcc@gcc.gnu.org/msg03309.html

Also the correct alternative of using xmmintrin.h is mentioned nowhere in the
documentation, neither the correct typedefs (or even which variation should be
prefered).
eg. defining v8qi as
typedef uint_8 v8qi __attribute__ ((vector_size (8)));
will result in errors with function requiring a 8*8 vector of integers. Its not
obvious that you have to use
typedef char v8qi __attribute__ ((vector_size (8)));
instead


-- 
           Summary: Documentation for x86 builtins is outdated
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: npl at chello dot at


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38836