I'm having trouble getting neon support from the compiler that's in the TI-SDK 6.00.00.00.
I was using the TI-SDK 5.03.02.00 and following the documentation on this wiki page for neon support:
http://processors.wiki.ti.com/index.php/Cortex-A8
I have these options for gcc/g++ compile flags:
"-march=armv7-a -mtune=cortex-a8 -mfpu=neon -ftree-vectorize -ffast-math -mfloat-abi=softfp"
This works and produces neon code with TI-SDK 5.03.02.00 which is based on the Arago toolchain.
When I migrated to the TI-SDK 6.00.00.00 tools based on the Linaro toolchain, I found on this wiki page:
http://processors.wiki.ti.com/index.php/Sitara_Linux_SDK_GCC_Toolchain
That said I should be using the hard ABI instead of the softfp ABI when compiling. So I changed my gcc/g++ flags to:
"-march=armv7-a -mtune=cortex-a8 -mfpu=neon -ftree-vectorize -ffast-math -mfloat-abi=hard"
This compiles but produces VFP code, not neon code.
Any idea what I'm doing wrong?
