Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

* fix sigmoid returns nan with very large input

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2 to 3.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v2...v3)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

Co-authored-by: Yoh <wangpeizhou@bilibili.com>
Co-authored-by: Yoh-Z <Yoh-Z@users.noreply.github.com>

* optimize x86 avx exp log sincos fma

* optimize avx&sse_mathfun exp,log,cos,sin,sincos and add fnmadd to x86_usability

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

* lets accept the float div vs recp error

Co-authored-by: MegEngine <megengine@megvii.com>
Co-authored-by: tpoisonooo <tpoisonooo@users.noreply.github.com>

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

* x86 sse2 optimization for conv1x1 conv3x3 pack4 and general sgemm pack4/pack4to1

* x86 sse2 optimization for conv3x3s1 pack4to1 and general sgemm convolution pack4to1, use aligned load/store

* enforce explicit alignment

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>