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Merge "Add a flag to disable SIMD optimizations."

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This commit is contained in:
Pascal Massimino 2017-02-03 20:30:32 +00:00 committed by Gerrit Code Review
commit 1b0e4abf08
2 changed files with 9 additions and 3 deletions
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1
CMakeLists.txt
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@ -3,6 +3,7 @@ cmake_minimum_required(VERSION 2.8.7)
project(libwebp C)
# Options for coder / decoder executables.
option(WEBP_ENABLE_SIMD "Enable any SIMD optimization." ON)
option(WEBP_BUILD_CWEBP "Build the cwebp command line tool." OFF)
option(WEBP_BUILD_DWEBP "Build the dwebp command line tool." OFF)
option(WEBP_BUILD_GIF2WEBP "Build the gif2webp conversion tool." OFF)

11
cmake/cpu.cmake
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@ -1,6 +1,11 @@
## Check for SIMD extensions.
function(webp_check_compiler_flag WEBP_SIMD_FLAG)
function(webp_check_compiler_flag WEBP_SIMD_FLAG ENABLE_SIMD)
if(NOT ENABLE_SIMD)
message(STATUS "Disabling ${WEBP_SIMD_FLAG} optimization.")
set(WEBP_HAVE_${WEBP_SIMD_FLAG} 0 PARENT_SCOPE)
return()
endif()
unset(WEBP_HAVE_FLAG_${WEBP_SIMD_FLAG} CACHE)
check_c_source_compiles("
#include \"${CMAKE_CURRENT_LIST_DIR}/../src/dsp/dsp.h\"
@ -56,11 +61,11 @@ foreach(I_SIMD RANGE ${WEBP_SIMD_FLAGS_RANGE})
# (especially on Android).
unset(WEBP_HAVE_${WEBP_SIMD_FLAG} CACHE)
set(CMAKE_REQUIRED_FLAGS)
webp_check_compiler_flag(${WEBP_SIMD_FLAG})
webp_check_compiler_flag(${WEBP_SIMD_FLAG} ${WEBP_ENABLE_SIMD})
if(NOT WEBP_HAVE_${WEBP_SIMD_FLAG})
list(GET SIMD_ENABLE_FLAGS ${I_SIMD} SIMD_COMPILE_FLAG)
set(CMAKE_REQUIRED_FLAGS ${SIMD_COMPILE_FLAG})
webp_check_compiler_flag(${WEBP_SIMD_FLAG})
webp_check_compiler_flag(${WEBP_SIMD_FLAG} ${WEBP_ENABLE_SIMD})
else()
set(SIMD_COMPILE_FLAG " ")
endif()