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IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
message("-- <FindZVECTOR>")
set(Z_ARCH_LIST "")
#firstly, tries to add the arch of the platform
EXEC_PROGRAM(LD_SHOW_AUXV=1 ARGS "/bin/true" OUTPUT_VARIABLE bintrue)
if(bintrue MATCHES "AT_PLATFORM:[ \\t\\n\\r]*([a-zA-Z0-9_]+)[ \\t\\n\\r]*")
if(CMAKE_MATCH_COUNT GREATER 0)
string(TOLOWER ${CMAKE_MATCH_1} platform)
if(${platform} MATCHES "^z(14|15)")
message("-- Z ARCH Platform: ${platform}")
list( APPEND Z_ARCH_LIST "${platform}" )
endif()
endif()
endif()
#adds other archs in descending order. as its cached nothing will be checked twice
list( APPEND Z_ARCH_LIST "z15" )
list( APPEND Z_ARCH_LIST "z14" )
SET(VECTORIZATION_CODE "
#include <vecintrin.h>
using vuint32 = __attribute__ ((vector_size (16))) unsigned int;
using vfloat32 = __attribute__ ((vector_size (16))) float;
vfloat32 vsel_ext(vuint32 o, vfloat32 x, vfloat32 y)
{
return vec_sel(y, x, o);
}
int main(){
vfloat32 h1 ={3.f, 4.f, 5.f, 6.f};
vfloat32 h2 = {9.f, 8.f, 11.f, 12.f};
vuint32 selector= {0xFFFFFFFF, 0, 0xFFFFFFFF, 0xFFFFFFFF};
vfloat32 hf = vsel_ext(selector, h1,h2);
int ret = (int)(hf[0]*1000+hf[1]*100+hf[2]*10+hf[3]);
return ret==3856;
}
")
foreach(Z_ARCH ${Z_ARCH_LIST})
SET(ARCH_SIMD_TEST_FLAGS_${Z_ARCH} " -mvx -mzvector -march=${Z_ARCH} -mtune=${Z_ARCH}")
message("-- check ${Z_ARCH}")
SET(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
SET(CMAKE_REQUIRED_FLAGS "${ARCH_SIMD_TEST_FLAGS_${Z_ARCH}}")
set(VECTORIZATION_CODE_${Z_ARCH} "${VECTORIZATION_CODE}")
CHECK_CXX_SOURCE_COMPILES("${VECTORIZATION_CODE_${Z_ARCH}}" COMPILE_OUT_${Z_ARCH})
SET(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
if(COMPILE_OUT_${Z_ARCH})
message("-- ${Z_ARCH} SIMD flags were set.")
set(CXX_ZVECTOR_FOUND TRUE)
SET(CXX_ZVECTOR_FLAGS "${ARCH_SIMD_TEST_FLAGS_${Z_ARCH}}" )
break()
endif()
endforeach()
message("-- </FindZVECTOR>")
endif()
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