implement simplemath (#4905)

* complete abs, fmod and sin function in simplemath.h

* remove some unused variables in simplemath.cpp

* modify test-coverage.yml and add some functions to simplemath.cpp

* modify erf.cpp which included math.h

* include platform.h for NCNN_SIMPLEMATH definition

* move utility constants and functions in simplemath.h to simplemath.cpp

* guard simplemath functions with extern "C"

* add NCNN_EXPORT macro in simplemath.h

* include plateform.h and guard all declarations with NCNN_SIMPLEMATH

* clean unused code in test_unaryop.cpp

* guard #include <vector> with NCNN_SIMPLEMATH in benchncnn.cpp

* add 'static' to guard functions that not declarated in header file

* modify sin and cos with better implementation

---------

Co-authored-by: HonestDeng <[email protected]>

Author: HonestDeng

.ci/linux-x64-cpu-gcc.yml

@@ -117,3 +117,11 @@ jobs:
         cmake --build . -j $(nproc)
     - name: test-simplestl-simpleomp
       run: cd build-simplestl-simpleomp && ctest --output-on-failure -j $(nproc)
+    - name: build-simplestl-simplemath
+      run: |
+        mkdir build-simplestl-simplemath && cd build-simplestl-simplemath
+        cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host-c.gcc.toolchain.cmake -DNCNN_STDIO=ON -DNCNN_STRING=ON -DNCNN_SIMPLESTL=ON -DNCNN_SIMPLEMATH=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+        cmake --build . -j $(nproc)
+    - name: test-simplestl-simplemath
+      run: cd build-simplestl-simplemath && ctest --output-on-failure -j $(nproc)
+

.ci/test-coverage.yml

@@ -908,3 +908,47 @@ jobs:
         lcov --list lcov.info
     - name: codecov
       run: ./codecov -t ${{settings.CODECOV_TOKEN.access_token}} -C ${{ ci.sha }} -B ${{ ci.head_ref }} -f build/lcov.info
+
+  linux-gcc-x64-simplemath:
+    name: linux-gcc-x64-simplemath
+
+    runs-on:
+      pool-name: docker
+      container:
+        image: bkci/ci:ubuntu
+    steps:
+    - name: checkout
+      checkout: self
+      with:
+        strategy: FRESH_CHECKOUT
+        enableSubmodule: false
+        enableGitLfs: false
+
+    - name: install-deps
+      run: |
+        apt-get update
+        apt-get install -y lcov
+        curl https://uploader.codecov.io/verification.gpg | gpg --no-default-keyring --keyring trustedkeys.gpg --import
+        curl -Os https://uploader.codecov.io/latest/linux/codecov
+        curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM
+        curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM.sig
+        gpgv codecov.SHA256SUM.sig codecov.SHA256SUM
+        shasum -a 256 -c codecov.SHA256SUM
+        chmod +x codecov
+
+    - name: build
+      run: |
+        mkdir build && cd build
+        cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host-c.gcc.toolchain.cmake -DCMAKE_BUILD_TYPE=debug -DNCNN_COVERAGE=ON -DNCNN_STDIO=ON -DNCNN_STRING=ON -DNCNN_SIMPLESTL=ON -DNCNN_SIMPLEMATH=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+        cmake --build . -j $(nproc)
+    - name: test
+      run: cd build && ctest --output-on-failure -j $(nproc)
+    - name: lcov-collect
+      run: |
+        cd build
+        lcov -d ./src -c -o lcov.info
+        lcov -r lcov.info '/usr/*' -o lcov.info
+        lcov -r lcov.info '*/build/*' -o lcov.info
+        lcov --list lcov.info
+    - name: codecov
+      run: ./codecov -t ${{settings.CODECOV_TOKEN.access_token}} -C ${{ ci.sha }} -B ${{ ci.head_ref }} -f build/lcov.info

.github/workflows/linux-aarch64-cpu-gcc.yml

@@ -86,6 +86,17 @@ jobs:
         export PATH=$GITHUB_WORKSPACE/qemu-install/bin:$PATH
         cd build-noint8
         TESTS_EXECUTABLE_LOADER=qemu-aarch64 TESTS_EXECUTABLE_LOADER_ARGUMENTS="-L;/usr/aarch64-linux-gnu" ctest --output-on-failure -j 2
+    
+    - name: build-simplestl-simplemath
+      run: |
+        mkdir build-simplestl-simplemath && cd build-simplestl-simplemath 
+        cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/aarch64-linux-gnu-c.toolchain.cmake -DNCNN_STDIO=ON -DNCNN_STRING=ON -DNCNN_SIMPLESTL=ON -DNCNN_SIMPLEMATH=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+        cmake --build . -j 2
+    - name: test-simplestl-simplemath
+      run: |
+        export PATH=$GITHUB_WORKSPACE/qemu-install/bin:$PATH
+        cd build-simplestl-simplemath
+        TESTS_EXECUTABLE_LOADER=qemu-aarch64 TESTS_EXECUTABLE_LOADER_ARGUMENTS="-L;/usr/aarch64-linux-gnu" ctest --output-on-failure -j 2
 
   linux-gcc-arm82:
     runs-on: ubuntu-20.04

CMakeLists.txt

@@ -56,6 +56,7 @@ option(NCNN_INSTALL_SDK "install ncnn library and headers" ON)
 option(NCNN_SIMPLEOCV "minimal opencv structure emulation" OFF)
 option(NCNN_SIMPLEOMP "minimal openmp runtime emulation" OFF)
 option(NCNN_SIMPLESTL "minimal cpp stl structure emulation" OFF)
+option(NCNN_SIMPLEMATH "minimal cmath" OFF)
 option(NCNN_THREADS "build with threads" ON)
 option(NCNN_BENCHMARK "print benchmark information for every layer" OFF)
 option(NCNN_C_API "build with C api" ON)

benchmark/benchncnn.cpp

@@ -25,7 +25,10 @@
 #include "datareader.h"
 #include "net.h"
 #include "gpu.h"
+
+#ifndef NCNN_SIMPLESTL
 #include <vector>
+#endif
 
 class DataReaderFromEmpty : public ncnn::DataReader
 {

src/CMakeLists.txt

@@ -39,6 +39,7 @@ set(ncnn_SRCS
     simpleocv.cpp
     simpleomp.cpp
     simplestl.cpp
+    simplemath.cpp
 )
 
 if(ANDROID)
@@ -207,7 +208,7 @@ if(NOT NCNN_SHARED_LIB)
     set_target_properties(ncnn PROPERTIES COMPILE_FLAGS -DNCNN_STATIC_DEFINE)
 endif()
 
-if(NCNN_SIMPLESTL)
+if(NCNN_SIMPLESTL AND NOT NCNN_SIMPLEMATH)
     # link math lib explicitly
     target_link_libraries(ncnn PUBLIC m)
 endif()
@@ -260,7 +261,6 @@ if(NCNN_THREADS)
     if(TARGET Threads::Threads)
         target_link_libraries(ncnn PUBLIC Threads::Threads)
     endif()
-
     if(NCNN_SIMPLEOMP OR NCNN_SIMPLESTL)
         target_link_libraries(ncnn PUBLIC pthread)
     endif()
@@ -580,6 +580,7 @@ if(NCNN_INSTALL_SDK)
         simpleocv.h
         simpleomp.h
         simplestl.h
+        simplemath.h
         vulkan_header_fix.h
         ${CMAKE_CURRENT_BINARY_DIR}/ncnn_export.h
         ${CMAKE_CURRENT_BINARY_DIR}/layer_shader_type_enum.h
@@ -598,5 +599,4 @@ endif()
 # add ncnn and generate-spirv to a virtual project group
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 set_property(TARGET ncnn PROPERTY FOLDER "libncnn")
-set_property(TARGET ncnn-generate-spirv PROPERTY FOLDER "libncnn")
-
+set_property(TARGET ncnn-generate-spirv PROPERTY FOLDER "libncnn")

src/gpu.cpp

@@ -16,7 +16,6 @@
 
 #if NCNN_VULKAN
 
-#include <math.h>
 #include <string.h>
 #include <vulkan/vulkan.h>
 

src/layer.cpp

@@ -16,7 +16,6 @@
 
 #include "cpu.h"
 
-#include <math.h>
 #include <string.h>
 
 #ifdef _MSC_VER

src/layer.h

@@ -21,8 +21,6 @@
 #include "paramdict.h"
 #include "platform.h"
 
-#include <math.h>
-
 #if NCNN_VULKAN
 #include "command.h"
 #include "pipeline.h"

src/layer/arm/binaryop_arm.cpp

@@ -14,8 +14,6 @@
 
 #include "binaryop_arm.h"
 
-#include <math.h>
-
 #if __ARM_NEON
 #include <arm_neon.h>
 #include "neon_mathfun.h"