Change NO_INVARIANCE to INVARIANCE option

CMakeLists.txt

@@ -44,7 +44,7 @@ option(ASTCENC_SHAREDLIB "Enable astcenc builds with core library shared objects
 option(ASTCENC_DIAGNOSTICS "Enable astcenc builds with diagnostic trace")
 option(ASTCENC_ASAN "Enable astcenc builds with address sanitizer")
 option(ASTCENC_UNITTEST "Enable astcenc builds with unit tests")
-option(ASTCENC_NO_INVARIANCE "Enable astcenc builds without floating point invariance")
+option(ASTCENC_INVARIANCE "Enable astcenc floating point invariance" ON)
 option(ASTCENC_CLI "Enable build of astcenc command line tools" ON)
 
 set(ASTCENC_UNIVERSAL_BUILD OFF)
@@ -204,9 +204,9 @@ printopt("NATIVE backend " ${ASTCENC_ISA_NATIVE})
 if("${ASTCENC_MACOS_BUILD}")
     printopt("Universal bin  " ${ASTCENC_UNIVERSAL_BUILD})
 endif()
-printopt("Decompressor   " ${ASTCENC_DECOMPRESSOR})
+printopt("Invariance     " ${ASTCENC_INVARIANCE})
 printopt("Shared libs    " ${ASTCENC_SHAREDLIB})
-printopt("No invariance  " ${ASTCENC_NO_INVARIANCE})
+printopt("Decompressor   " ${ASTCENC_DECOMPRESSOR})
 printopt("Diagnostics    " ${ASTCENC_DIAGNOSTICS})
 printopt("ASAN           " ${ASTCENC_ASAN})
 printopt("Unit tests     " ${ASTCENC_UNITTEST})

Docs/Building.md

@@ -155,7 +155,7 @@ will return the error `ASTCENC_ERR_NOT_IMPLEMENTED` during context creation.
 All normal builds are designed to be invariant, so any build from the same git
 revision will produce bit-identical results for all compilers and CPU
 architectures. To achieve this we sacrifice some performance, so if this is
-not required you can specify `-DASTCENC_NO_INVARIANCE=ON` to enable additional
+not required you can specify `-DASTCENC_INVARIANCE=OFF` to enable additional
 optimizations. This has most benefit for AVX2 builds where we are able to
 enable use of the FMA instruction set extensions.
 

Source/cmake_core.cmake

@@ -195,7 +195,7 @@ macro(astcenc_set_properties ASTCENC_TARGET_NAME ASTCENC_IS_VENEER)
                 $<$<CXX_COMPILER_ID:${CLANG_LIKE}>:-fsanitize=address>)
     endif()
 
-    if(${ASTCENC_NO_INVARIANCE})
+    if(NOT ${ASTCENC_INVARIANCE})
         target_compile_definitions(${ASTCENC_TARGET_NAME}
             PRIVATE
                 ASTCENC_NO_INVARIANCE=1)
@@ -330,7 +330,7 @@ macro(astcenc_set_properties ASTCENC_TARGET_NAME ASTCENC_IS_VENEER)
         # which significantly improve performance. Note that this DOES reduce
         # image quality by up to 0.2 dB (normally much less), but buys an
         # average of 10-15% performance improvement ...
-        if(${ASTCENC_NO_INVARIANCE} AND NOT ${ASTCENC_IS_VENEER})
+        if((NOT ${ASTCENC_INVARIANCE}) AND (NOT ${ASTCENC_IS_VENEER}))
             target_compile_options(${ASTCENC_TARGET_NAME}
                 PRIVATE
                     $<$<NOT:$<CXX_COMPILER_ID:MSVC>>:-mfma>)