[Windows] misc fixes to enable Windows build

Author: SS-JIA

backends/xnnpack/CMakeLists.txt

@@ -73,19 +73,27 @@ foreach(fbs_file ${_xnnpack_schema__srcs})
   )
 endforeach()
 
+if(WIN32)
+  set(MV_COMMAND powershell -Command "Move-Item -Path ${_xnnpack_flatbuffer__outputs} -Destination ${_xnnpack_schema__outputs}")
+else()
+  set(MV_COMMAND mv ${_xnnpack_flatbuffer__outputs} ${_xnnpack_schema__outputs})
+endif()
+
 # Generate the headers from the .fbs files.
 add_custom_command(
   OUTPUT ${_xnnpack_schema__outputs}
   COMMAND
     ${FLATC_EXECUTABLE} --cpp --cpp-std c++11 --scoped-enums -o
     "${_xnnpack_schema__include_dir}/executorch/backends/xnnpack/serialization"
     ${_xnnpack_schema__srcs}
-  COMMAND mv ${_xnnpack_flatbuffer__outputs} ${_xnnpack_schema__outputs}
+  COMMAND ${MV_COMMAND}
   WORKING_DIRECTORY ${EXECUTORCH_ROOT}
   COMMENT "Generating xnnpack_schema headers"
   VERBATIM
 )
 
+unset(MV_COMMAND)
+
 add_library(xnnpack_schema INTERFACE ${_xnnpack_schema__outputs})
 set_target_properties(xnnpack_schema PROPERTIES LINKER_LANGUAGE CXX)
 target_include_directories(

extension/llm/custom_ops/CMakeLists.txt

@@ -49,7 +49,7 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm64|armv7)$")
   list(APPEND _custom_ops__srcs
        "extension/llm/custom_ops/spinquant/third-party/FFHT/fht_neon.c"
   )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86_64|AMD64)")
   list(APPEND _custom_ops__srcs
        "extension/llm/custom_ops/spinquant/third-party/FFHT/fht_avx.c"
   )

install_executorch.bat

@@ -7,14 +7,8 @@ rem This batch file provides a basic functionality similar to the bash script.
 
 cd /d "%~dp0"
 
-rem Find the names of the python tools to use (replace with your actual python installation)
-if "%PYTHON_EXECUTABLE%"=="" (
-  if "%CONDA_DEFAULT_ENV%"=="" OR "%CONDA_DEFAULT_ENV%"=="base" OR NOT EXIST "python" (
-    set PYTHON_EXECUTABLE=python3
-  ) else (
-    set PYTHON_EXECUTABLE=python
-  )
-)
+rem Under windows, it's always python
+set PYTHON_EXECUTABLE=python
 
 "%PYTHON_EXECUTABLE%" install_executorch.py %*