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Only set SSE/SSE2 flags for 32-bit builds on Windows

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They aren't needed for 64-bit since all x86 64-bit processors have
these instructions.
This commit is contained in:
Leland Lucius
2020-05-26 23:12:19 -05:00
parent 97c5a9e0c2
commit f33905cd30
1 changed files with 21 additions and 3 deletions
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24
CMakeLists.txt
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@@ -213,6 +213,19 @@ set( CMAKE_LINK_INTERFACE_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} )
# Various common checks whose results are used by the different targets
test_big_endian( WORDS_BIGENDIAN )
# Determine 32-bit or 64-bit target
if( CMAKE_C_COMPILER_ID MATCHES "MSVC" AND CMAKE_VS_PLATFORM_NAME MATCHES "Win64|x64" )
set( IS_64BIT ON )
elseif( NOT CMAKE_SIZEOF_VOID_P STREQUAL "4" )
set( IS_64BIT ON )
endif()
if( IS_64BIT )
message( STATUS "Building for 64-bit target" )
else()
message( STATUS "Building for 32-bit target" )
endif()
# Check for compiler flags
if( CMAKE_CXX_COMPILER_ID MATCHES "AppleClang|Clang|GNU" )
check_cxx_compiler_flag( "-mmmx" HAVE_MMX )
@@ -231,11 +244,16 @@ if( CMAKE_CXX_COMPILER_ID MATCHES "AppleClang|Clang|GNU" )
endif()
elseif( CMAKE_CXX_COMPILER_ID MATCHES "MSVC" )
set( HAVE_MMX ON )
set( MMX_FLAG "" )
set( HAVE_SSE ON )
set( SSE_FLAG "/arch:SSE" )
set( HAVE_SSE2 ON )
set( SSE2_FLAG "/arch:SSE2" )
set( MMX_FLAG "" )
if( IS_64BIT )
set( SSE_FLAG "" )
set( SSE2_FLAG "" )
else()
set( SSE_FLAG "/arch:SSE" )
set( SSE2_FLAG "/arch:SSE2" )
endif()
endif()
check_include_files( "float.h;stdarg.h;stdlib.h;string.h" STDC_HEADERS )