On Thursday, 25 February 2021 at 14:28:40 UTC, Guillaume Piolat
wrote:
On Thursday, 25 February 2021 at 11:28:14 UTC, z wrote:
How does one optimize code to make full use of the CPU's SIMD
capabilities?
Is there any way to guarantee that "packed" versions of SIMD
instructions will be used?(e.g. vmulps, vsqrtps, etc...)
https://code.dlang.org/packages/intel-intrinsics
A bit of elaboration on why you might want to prefer
intel-intrinsics:
- it supports all D compilers, including DMD 32-bit target
- targets arm32 and arm64 with same code (LDC only)
- core.simd just give you the basic operators, but not say,
pmaddwd or any of the complex instructions. Some instructions
need very specific work to get them.
- at least with LLVM, optimizers works reliably over subsequent
versions of the compiler.
