* runtime cpu dispatch

* force thread one

* disable openmp for coverage

* simplify test layer

* print NCNN_TARGET_ARCH

* less ci build variants

* weight fp16 storage option

* test convdw int8

* apple a12 a13

* ncnn_add_layer ncnn_add_shader cmake macro

* added avx versions of commonly used layers

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* Unroll loops and increase test coverage

* Restyled/pull 1897 (#13)

* Restyle

Co-authored-by: Restyled.io <commits@restyled.io>

* cleanup variable declaration

* fix ctest

* Restyled/pull 1897 (#14)

Restyle
Co-authored-by: Restyled.io <commits@restyled.io>

* Fix ctest for convolutions without AVX.

Co-authored-by: Restyled.io <commits@restyled.io>

* added fp16 weight storage version

* Small changes

* Fixed fp16 weight storage layers

* fix innerproduct

* fix loop error

* Fix windows build.

Disable fp 16 conversion when detecting int8 weights.

Implement requested changes.

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* Update option.cpp

Set fp16 storage based on vulkan being used or not.

* added ability for storing state in lstm layer

* added avx lstm

* added arm lstm

* fix innerproduct activation location and add 4 parallel channel version

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* revert arm file

* commit before switch

* implement requested changes

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* More x86 optimized implementations of common layers.

Added LSTM layers for arm and x86 + a ctest to verify the layer accuracy

Added fp16 innerproduct for arm

* fix non avx build

* Add fp16 arm compiler and cpu checks. Remove statefullness from LSTM implementation.

* Fix build check for fp16 arm

* Bypass lstm_fp16 if not supported

* Build order was incorrect

* fix std::min missing in windows build

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* attempting to fix gnu build by enabling: -mfp16-format=ieee to fix the missing __fp16 type

* remove double "fix"

* Specify ieee fp16 format

* implement requested changes

* fix arm non-fp16 build

* fix arm lstm

* Restyled/pull 1881 (#15)

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

Co-authored-by: Restyled.io <commits@restyled.io>

* Check blob size on arm lstm

* fix styling

Co-authored-by: Restyled.io <commits@restyled.io>

* Fix winograd 3x3 avx and extend test converage

* fix ctest on non-avx path

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* remove unused broadcasts

* Comment with #if 0

Co-authored-by: Restyled.io <commits@restyled.io>

* added fp16 weight storage version

* Small changes

* Fixed fp16 weight storage layers

* fix innerproduct

* fix loop error

* Fix windows build.

Disable fp 16 conversion when detecting int8 weights.

Implement requested changes.

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* Update option.cpp

Set fp16 storage based on vulkan being used or not.

* fix innerproduct activation location and add 4 parallel channel version

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* revert arm file

* implement requested changes

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

Co-authored-by: Restyled.io <commits@restyled.io>

* Added 3x3 pack8 winograd implementation

* working winograd 3x3 and direct 2x2

* Remove typo

* remove debug print

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* fix non avx build

* Added flatten and reshape avx implementations

* attempt to fix ios sim build

* Fix build

* Revert include removal

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

Co-authored-by: Restyled.io <commits@restyled.io>

* added avx implementations of FC and Max pool

* Specify AVX2

* Small fixes and using Fused avx activations

* fix type casting

* fixing some CI errors

* Fix code format

* fix pooling test

* remove vector typedef

* More compile fixes

* remove vector typedef

* set c++ version to 17

* Force c++ 17

* Fixing mathfun

* Try and workaround typedef issues

* typefix

* Remove typedef

* switch to static inline

* attempting to fix msvc bug

* Verified MSVX FIX

* Fixing clang build

* commit before switch

* More avx and packing implementation

* Fix ctest

* starting the depthwise pack 8 implementation

* Unrolled loop

* add depthwise pack 8 implementations

* Working 1x1 pack 8 implementation added

* revert incorrect changes

* added conact elempack 8

* more elempack enabled layers added and started on the conversion of the winograd pack4 conv 3x3

* Added code formatting

* fix styling

* Unroll loops

* unrolling loops

* Added more elempac layers for mobilenet v3

* revert commit

* fix code style

* remove arm neon references

* remove pack4 references

* More cleanup

* added packing avx code

* fixing linux build ctests

* remove usage of aligned loads

* More aligned mem ops removed

* Cleanup, revert some files and remove not working winograd and shufflechannel implementation

* add stackoverflow referal

* Fix windows build

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* implement requested chaanges

* remove reshape

* revert arm file change

* Restyled by clang-format

* Restyled by astyle

* Restyled by clang-format

* Restyled by astyle

* fix unterminated directive

Co-authored-by: Restyled.io <commits@restyled.io>

* added avx implementations of FC and Max pool

* Specify AVX2

* Small fixes and using Fused avx activations

* fix type casting

* fixing some CI errors

* Fix code format

* fix pooling test

* remove vector typedef

* More compile fixes

* remove vector typedef

* set c++ version to 17

* Force c++ 17

* Fixing mathfun

* Try and workaround typedef issues

* typefix

* Remove typedef

* switch to static inline

* attempting to fix msvc bug

* Verified MSVX FIX

* Fixing clang build

* fix pooling on MSVC

* Remove c++ 17

* Implement requested changes

* small cleanup

* fix aligment

* fix pooling import

* revert "Implement requested changes"

This reverts commit 5d8cc9494b.

* fix import order

* Undo aligned load

* Add channel padding and blazeface model support.

* remove python binding

* remove std::min usage

* fix reference blob usage

* Increased padding test  coverage

* implement requested changes

* update roialign

* update tool for roialign

* fix ceil for roialign

* fix ios build

* fix

* fix

* make it compatibile with the old version

* fix ios build

* trigger CI

* fix test

* order

* build

* remove code

* merge roialign

* accelerate ROIAlign

* update note

* rename func

* roialign version

* trigger CI

* fix roialign

* use ref for pre-calc in roialign

* retrigger CI

* pre-alloc

* add swish layer

* add swish test

* enable image storage test

* update swiftshader, use subzero backend, opt default

* add mish layer

* add mish test

* wip

* wip

* fix

* image and imageview can not be destroyed until command execution ends

* fast copy path for tightly packed data

* wip

* texture load works

* 1d 3d image

* record clone image, multiple commands share one image reference

* upload download image

* layer forward accept vkimagemat

* vkimagemat graph works

* staging vkimagemat for passing dynamic parameters, macro for fp32+image shader, padding image shader

* vkimagemat elemsize

* convolution test pass

* conv1x1s1 image shader

* fast staging image allocator from host memory, pooling image shader

* convolutiondepthwise image shader

* innerproduct image shader

* packing image shader

* crop deconvolution image shader

* resolve spirv binding types

* image fp16 and fp16a, cast image shader

* eltwise image shader

* wip

* absval image shader

* deconvolutiondepthwise image shader

* concat image shader, squeezenet works

* noop split image shader

* uniform precision hint

* layer support_image_storage

* wip

* vulkan device utility operator

* command is storage and packing option aware

* fallback to cpu on image allocation failed, mobilenetssd works

* flatten image shader, enable more test

* ci test

* check imgfp32 imgfp16 imgfp16a features

* fix ci test

* fix ci test

* upgrade swiftshader

* wip

* opt aggressive

* imgfp16p

* opt none

* convolution winograd image shader

* fix flush range, fast copy path for continous buffer

* minor fix

* fix innerproduct

* wip ...

* wip

* cast fix

* packing test

* wip

* image fp16p is fp16p

* wip

* silence

* more line info

* code clean

* softmax image shader