Just wanted to share this because I'm in the process of trying to
build a similar set of macros/inlines now that I converted my own
Altivec code to SSE
Interesting. It's conceptually similar to the low-level vec interface
of macstl, although they don't mention macstl -- but given that it
dates from 2003 and the first public version of macstl is July 2003,
that makes sense.
Being a C macro system, it doesn't build a type system on SSE nor use
overloads. The following should compile to identical code on both
Altivec and SSE:
vec <short, 8> A;
vec <short, 8> B;
vec <short, 8> C;
A = *pSrcA; // or A = vec <short, 8>::load (pSrcA);
B = *pSrcB; // or B = vec <short, 8>::load (pSrcB);
C = A + B;
The current macstl has a PERL script called macstlizer that tries to
parse regular C code using Altivec intrinsics and convert it to
macstl C++ code. Then there's a #include that maps most of the
Altivec intrinsics into equivalent SSE intrinsics. The preferred
option would be to use platform-independent operations such as +, but
that would be difficult to do accurately in a automated script
conversion, since the platform-independent ops are almost exactly
equivalent to their C/C++ language definitions, while the Altivec and
SSE ops have certain edge cases for certain types.
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