Enable support for Emscripten in CMake

Author: aiusepsi

CMakeLists.txt

@@ -89,6 +89,15 @@ ELSEIF(CMAKE_GENERATOR MATCHES "^Visual Studio " AND CMAKE_GENERATOR_PLATFORM)
   ELSE()
     MESSAGE(FATAL_ERROR "Unsupported Visual Studio architecture \"${CMAKE_GENERATOR_PLATFORM}\"")
   ENDIF()
+ELSEIF(CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
+  SET(XNNPACK_TARGET_PROCESSOR "wasm")
+  SET(XNNPACK_ENABLE_RISCV_VECTOR OFF)
+  IF(CMAKE_C_FLAGS MATCHES "-msimd128" OR CMAKE_CXX_FLAGS MATCHES "-msimd128")
+    SET(XNNPACK_TARGET_PROCESSOR "wasmsimd")
+  ENDIF()
+  IF(CMAKE_C_FLAGS MATCHES "-mrelaxed-simd" OR CMAKE_CXX_FLAGS MATCHES "-mrelaxed-simd")
+    SET(XNNPACK_TARGET_PROCESSOR "wasmrelaxedsimd")
+  ENDIF()
 ELSEIF(CMAKE_SYSTEM_PROCESSOR MATCHES "^i[3-7]86$")
   SET(XNNPACK_TARGET_PROCESSOR "x86")
 ELSEIF(CMAKE_SYSTEM_PROCESSOR STREQUAL "AMD64")
@@ -359,7 +368,7 @@ ENDIF()
 # ---[ Build flags
 IF(NOT CMAKE_SYSTEM_NAME)
   MESSAGE(FATAL_ERROR "CMAKE_SYSTEM_NAME not defined")
-ELSEIF(NOT CMAKE_SYSTEM_NAME MATCHES "^(Android|Darwin|iOS|Linux|Windows|CYGWIN|MSYS|QURT)$")
+ELSEIF(NOT CMAKE_SYSTEM_NAME MATCHES "^(Android|Darwin|iOS|Linux|Windows|CYGWIN|MSYS|QURT|Emscripten)$")
   MESSAGE(FATAL_ERROR "Unrecognized CMAKE_SYSTEM_NAME value \"${CMAKE_SYSTEM_NAME}\"")
 ENDIF()
 IF(CMAKE_SYSTEM_NAME MATCHES "Windows")
@@ -802,6 +811,30 @@ IF(XNNPACK_TARGET_PROCESSOR MATCHES "^riscv")
     LIST(APPEND PROD_MICROKERNEL_SRCS ${PROD_RVVFP16ARITH_MICROKERNEL_SRCS})
   ENDIF()
 ENDIF()
+IF(XNNPACK_TARGET_PROCESSOR MATCHES "wasm")
+  LIST(APPEND PROD_MICROKERNEL_SRCS ${PROD_WASM_MICROKERNEL_SRCS})
+  LIST(APPEND NON_PROD_MICROKERNEL_SRCS ${NON_PROD_WASM_MICROKERNEL_SRCS})
+  IF(XNNPACK_ENABLE_ASSEMBLY)
+    LIST(APPEND PROD_MICROKERNEL_SRCS ${PROD_WASM32_ASM_MICROKERNEL_SRCS})
+    LIST(APPEND NON_PROD_MICROKERNEL_SRCS ${NON_WASM32_ASM_MICROKERNEL_SRCS})
+  ENDIF()
+ENDIF()
+IF(XNNPACK_TARGET_PROCESSOR STREQUAL "wasmsimd")
+  LIST(APPEND PROD_MICROKERNEL_SRCS ${PROD_WASMSIMD_MICROKERNEL_SRCS})
+  LIST(APPEND NON_PROD_MICROKERNEL_SRCS ${NON_PROD_WASMSIMD_MICROKERNEL_SRCS})
+  IF(XNNPACK_ENABLE_ASSEMBLY)
+    LIST(APPEND PROD_MICROKERNEL_SRCS ${PROD_WASMSIMD32_ASM_MICROKERNEL_SRCS})
+    LIST(APPEND NON_PROD_MICROKERNEL_SRCS ${NON_WASMSIMD32_ASM_MICROKERNEL_SRCS})
+  ENDIF()
+ENDIF()
+IF(XNNPACK_TARGET_PROCESSOR STREQUAL "wasmrelaxedsimd")
+  LIST(APPEND PROD_MICROKERNEL_SRCS ${PROD_WASMRELAXEDSIMD_MICROKERNEL_SRCS})
+  LIST(APPEND NON_PROD_MICROKERNEL_SRCS ${NON_PROD_WASMRELAXEDSIMD_MICROKERNEL_SRCS})
+  IF(XNNPACK_ENABLE_ASSEMBLY)
+    LIST(APPEND PROD_MICROKERNEL_SRCS ${PROD_WASMRELAXEDSIMD32_ASM_MICROKERNEL_SRCS})
+    LIST(APPEND NON_PROD_MICROKERNEL_SRCS ${NON_WASMRELAXEDSIMD32_ASM_MICROKERNEL_SRCS})
+  ENDIF()
+ENDIF()
 
 SET(ALL_MICROKERNEL_SRCS ${PROD_MICROKERNEL_SRCS} ${NON_PROD_MICROKERNEL_SRCS})
 
@@ -1032,6 +1065,15 @@ IF(XNNPACK_TARGET_PROCESSOR MATCHES "^x86(_64)?$")
     ENDIF()
   ENDIF()
 ENDIF()
+IF(XNNPACK_TARGET_PROCESSOR STREQUAL "wasm")
+  SET_PROPERTY(SOURCE ${ALL_WASM_MICROKERNEL_SRCS} APPEND_STRING PROPERTY COMPILE_FLAGS " -fno-fast-math -fno-math-errno ")
+ENDIF()
+IF(XNNPACK_TARGET_PROCESSOR STREQUAL "wasmsimd")
+  SET_PROPERTY(SOURCE ${ALL_WASMSIMD_MICROKERNEL_SRCS} APPEND_STRING PROPERTY COMPILE_FLAGS " -fno-fast-math -fno-math-errno ")
+ENDIF()
+IF(XNNPACK_TARGET_PROCESSOR STREQUAL "wasmrelaxedsimd")
+  SET_PROPERTY(SOURCE ${ALL_WASMRELAXEDSIMD_MICROKERNEL_SRCS} APPEND_STRING PROPERTY COMPILE_FLAGS " -fno-fast-math -fno-math-errno ")
+ENDIF()
 
 # Set `XNN_LOG_LEVEL` transitively for all targets that depend on `logging`.
 TARGET_COMPILE_DEFINITIONS(logging PUBLIC "XNN_LOG_LEVEL=$<$<CONFIG:Debug>:5>$<$<NOT:$<CONFIG:Debug>>:0>")