Real "FORCESCALAR" mode on Windows

Author: ThePituLegend

CMakeLists.txt

@@ -140,6 +140,8 @@ else()
         if (NOT QUICKED_FORCESCALAR)
             add_compile_options(/arch:SSE4.2 /arch:AVX2) # Strictly speaking, it should be SSE4.1. But MSVC lacks this flag.
             add_compile_definitions(USE_SSE) # MSVC do not define the macro when using /arch:SSE4.2
+        else()
+            add_compile_options(/arch:SSE2) # Forcefully disable SSE4.1 and AVX2 (SSE2 is the minimum supported by MSVC)
         endif()
     else()
         if(NOT (CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND CMAKE_APPLE_SILICON_PROCESSOR STREQUAL "arm64"))

bindings/CMakeLists.txt

@@ -16,8 +16,7 @@ if (NOT MSVC)
     target_compile_options(pyquicked_scalar PRIVATE -fvisibility=hidden)
     target_compile_options(pyquicked_scalar PRIVATE -mno-sse4.1 -mno-avx2) # Disable SSE4.1 and AVX2 for the scalar Python binding
 else()
-    target_compile_options(pyquicked_scalar PRIVATE /arch:IA32) # Disable SSE4.1 and AVX2 for the scalar Python binding
-    target_compile_definitions(pyquicked_scalar PRIVATE _M_IX86)
+    target_compile_options(pyquicked_scalar PRIVATE /arch:SSE2)  # Disable SSE4.1 and AVX2 for the scalar Python binding (SSE2 is the minimum supported by MSVC)
 endif()
 
 

quicked/CMakeLists.txt

@@ -46,8 +46,7 @@ endif()
 if (NOT MSVC)
     target_compile_options(quicked_scalar PRIVATE -mno-sse4.1 -mno-avx2) # Disable SSE4.1 and AVX2 for the scalar Python binding
 else()
-    target_compile_options(quicked_scalar PRIVATE /arch:IA32) # Disable SSE4.1 and AVX2 for the scalar Python binding
-    target_compile_definitions(quicked_scalar PRIVATE _M_IX86)
+    target_compile_options(quicked_scalar PRIVATE /arch:SSE2) # Disable SSE4.1 and AVX2 for the scalar Python binding (SSE2 is the minimum supported by MSVC)
 endif()
 set_target_properties(quicked_scalar PROPERTIES EXCLUDE_FROM_ALL TRUE)