I have some SIMD code in Altivec processing 32 bit integer values in parallel. In some cases I want to load the integers as little endian, in other cases as big endian (note: this choice is regardless of the native CPU endianess; it is based on what algorithm is running). Doing the actual byte swap is very easy using Altivec's permute op...
I've written several copy functions in search of a good memory strategy on PowerPC. Using the Altivec or fp registers with cache hints (dcb*) doubles the performance over a simple byte copy loop for large data. Initially pleased with that, I threw in a regular memcpy to see how it compared... 10x faster than my best! I have no intention ...
Does the Eclipse CDT C++ editor have a means of supporting the Altivec C++ language extensions, as implemented for example in the GNU g++ compilers when compiling with -maltivec? Specifically, can it be made to stop reporting the vector data types as syntax errors? e.g. vector unsigned char foo; declares a 128-bit vector variable nam...