Adjust the command line format on "Build for Linux"

* added a number of optimized sse layers, specifically to increase performance of mobilenet style networks

* use general fmadd

* forceline x86 fmadd for better performance

* fix msvc compile warning

* simplify swish implementation

* Use activation layer for better performance

* Optimize x86 ConvolutionDepthWise activation

* add general fused activation
* add NCNN_FORCE_INLINE option

* build macos vulkan

* drop rt

* load swiftshader

* workaround swiftshader fltmax fp16 nan

Co-authored-by: zhuo@mbp <imzhuo@foxmail.com>

* Fix codepaths for fp16 weights when only AVX is enabled

* Disable opt overrides

* Update SDK url

* Update vulkan SDK download version

* Debugging risv pad

* apply code-format changes

* fix padding test

* fix mips slice test

* fix lrn test

* implement mish swish image shader, fix pooling adaptive image storage support, drop debug output

* update ci ubuntu 18.04

Co-authored-by: nihui <shuizhuyuanluo@126.com>

vulkansdk version update

Co-authored-by: v-shux <v-shux@microsoft.com>

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.0.3 to 2.1.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v2.0.3...v2.1.0)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  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>

* RVV optimzied DropOut

* RVV optimized GRU, fp32

* RVV optimized GRU, fp16

* RVV optimzed Softmax

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.0.2 to 2.0.3.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v2.0.2...v2.0.3)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

* Use RVV spec 0.7.1 for C906.

* Fix code style issue.

* Update convolution_sgemm_packn_fp16s.h

RVV_SPEC_0_7 update

* apply code-format changes

Co-authored-by: Zhang Xianyi <xianyi@perfxlab.com>
Co-authored-by: yaobyPerfxlab <yaobyPerfxlab@users.noreply.github.com>

* arm neon optimization for requantize leakyrelu

* add missing changes

* Update test_requantize.cpp

* more test coverage