03-Apr-2014 00:46, Walter Bright пишет:
On 4/2/2014 12:38 PM, Dmitry Olshansky wrote:
Ideally we'd need:
a) A collection of meaningful (high-level compared to std.simd)
primitives that
can be accelerated by SIMD, in Phobos. Such as searching, bit-counting
etc.
memchr is already optimized by SIMD, and std.algorithm.find uses memchr.
In general, enormous effort has been poured into optimizing C standard
library functions. If an algorithm can be implemented using such
functions, we ought to.
This is all good and well, but...
memchr is working on the level of a single byte, leaving nothing for 2,
4, 8 byte-wide needles. Not type-safe. No fallback for CTFE.
Obviously C standard is lacking many things, hence the endless row of
extensions.
--
Dmitry Olshansky
