That doesn't seem to be quite right. From Intel's site:
http://software.intel.com/sites/products/documentation/studio/composer/en-us/2011Update/compiler_c/optaps/common/optaps_vec_par.htm
For integer loops, the 128-bit Intel® Streaming SIMD Extensions (Intel® SSE)
provide SIMD instructions for most arithmetic and logical operators on 32-bit,
16-bit, and 8-bit integer data types, with limited support for the 64-bit
integer data type.
Vectorization may proceed if the final precision of integer wrap-around
arithmetic is preserved. A 32-bit shift-right operator, for instance, is not
vectorized in 16-bit mode if the final stored value is a 16-bit integer. Also,
note that because the Intel® SSE instruction sets are not fully orthogonal
(shifts on byte operands, for instance, are not supported), not all integer
operations can actually be vectorized.
OTOH, AVX2 - Integer data types expanded to 256-bit SIMD.
There are also some new gather operations and filtering abilities, etc, which
might be useful. Odds are, they'll require some hand-written assembler.
Terry McIntyre <[email protected]>
Unix/Linux Systems Administration
Taking time to do it right saves having to do it twice.
>________________________________
> From: Detlef Schmicker <[email protected]>
>To: [email protected]
>Sent: Thursday, June 13, 2013 2:56 PM
>Subject: [Computer-go] AVX2 effect on go programs?
>
>
>I wonder if anybody already compiled a mc go program for the haswell cpu
>with auto-vectorization and avx2 enabled?
>
>If I understood correctly it is the first intel cpu which can vectorize
>integer operations, and go programs have a lot of them.
>
>Detlef
>
>_______________________________________________
>Computer-go mailing list
>[email protected]
>http://dvandva.org/cgi-bin/mailman/listinfo/computer-go
>
>
>
_______________________________________________
Computer-go mailing list
[email protected]
http://dvandva.org/cgi-bin/mailman/listinfo/computer-go
