On 8/18/2010 6:30 AM, Rémi Denis-Courmont wrote:
The only portable manner to establish NEON support is the __ARM_NEON__
predefined constant, just like __SSE3__ implies SSE3 support. Obviously, that
simply reflects the compiler settings. If you want to make the decision at run-
time, you're going to need operating system-specific code.
it's more complex, at least for __SSE3__
you won't get __SSE3__ set unless you tell the compiler you support this
instruction, and at that point, the compiler
will automatically use the instructions as well.
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