Yes and no. If you write the ASM you can use them, but it's code generation likely won't (but then I haven't checked for 2 months).
Most things that can be vectorizes will be placed in SSE rather then AVX. Also the GCC generally sucks at optimizing for SSE, or determining when code should use SSE as opposed to standard registers.
Generally speaking the LLVM backend does better SSE and vectorization code generation. But some think it used SSE to much/incorrectly.
So TLDR no
New wide registers are VERY new. The are barely supported, my processor has AVX2.0 and I have (still have to) one of these days set up perf properly because all of its fault codes aren't properly baked into the kernel yet (as of 3.17).
(Sorry for the lack of references)
Also the biggest draw back of AVX is they don't hold their state between context changes :/
Most things that can be vectorizes will be placed in SSE rather then AVX. Also the GCC generally sucks at optimizing for SSE, or determining when code should use SSE as opposed to standard registers.
Generally speaking the LLVM backend does better SSE and vectorization code generation. But some think it used SSE to much/incorrectly.
So TLDR no
New wide registers are VERY new. The are barely supported, my processor has AVX2.0 and I have (still have to) one of these days set up perf properly because all of its fault codes aren't properly baked into the kernel yet (as of 3.17).
(Sorry for the lack of references)
Also the biggest draw back of AVX is they don't hold their state between context changes :/