This patch uses _mm_cvtsi128_si{32,64} intrinsics when returning value
in float2int8() to reduce unnecessary memory accesses.

Resolves TODO "use _mm_cvtsi128_si64 on 64bit target".

Signed-off-by: Kagurazaka Kotori <kagurazakakotori@gmail.com>

* x86/avx_mathfun.h: Remove fallback warnings

This patch removes warning messages indicating falling back to SSE2
when AVX2 support is disabled as suggested. Also reorders non-AVX2
macros for readability and faster preprocessing.

Suggested-by: nihui <shuizhuyuanluo@126.com>
Signed-off-by: Kagurazaka Kotori <kagurazakakotori@gmail.com>

* apply code-format changes

Co-authored-by: kagurazakakotori <kagurazakakotori@users.noreply.github.com>

* avx-vnni and avx512-vnni optimization for convolution int8 gemm and 3x3 winograd pack8to4/pack8to1

* some sse 4.1 optimization

* sse2/avx2 optimization for convolution 3x3 winograd42 int8 pack8to4/pack8to1

Bumps [pypa/gh-action-pypi-publish](https://github.com/pypa/gh-action-pypi-publish) from 1.4.2 to 1.5.0.
- [Release notes](https://github.com/pypa/gh-action-pypi-publish/releases)
- [Commits](https://github.com/pypa/gh-action-pypi-publish/compare/v1.4.2...v1.5.0)

---
updated-dependencies:
- dependency-name: pypa/gh-action-pypi-publish
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* pnnx Tensor index

* add test

* update qcom855+ benchmark

* Update README.md

* Update README.md

* add rock3a, update imx.7d benchmark

* update raspberrypi3b+ benchmark

* update