[Interest] SIMD accelerated wrappers for relevant Qt container classes (QVector, ...) or QByteArray?
annulen at yandex.ru
Wed May 10 13:07:56 CEST 2017
10.05.2017, 14:05, "René J.V. Bertin" <rjvbertin at gmail.com>:
> On Wednesday May 10 2017 12:21:48 Allan Sandfeld Jensen wrote:
>> That is not how the simple intrinsics are defined any more. They instead use
>> special SIMD extensions to tell the compiler to add two vectors of 8 integers
>> together. When AVX2 is available that can be done with one instruction, but if
>> -mavx2 is not used, then it will do it with SSE2 instead using 3 instructions
>> or more.
> Can you still call that "intrinsics", let alone "simple intrinsics"? :)
It's still much easier to deal with intrinsics than inline asm
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