1 # - Check the username performing the build, as well as date and time
3 # gmx_detect_acceleration(GMX_SUGGESTED_CPU_ACCELERATION)
5 # Try to detect CPU information and suggest an acceleration option
6 # (such as SSE/AVX) that fits the current CPU. These functions assume
7 # that gmx_detect_target_architecture() has already been run, so that
8 # things like GMX_IS_X86 are already available.
10 # Sets ${GMX_SUGGESTED_CPU_ACCELERATION} in the parent scope if
11 # GMX_CPU_ACCELERATION is not set (e.g. by the user, or a previous run
15 # we rely on inline asm support for GNU!
16 include(gmxTestInlineASM)
18 function(gmx_suggest_x86_acceleration _suggested_acceleration)
20 gmx_test_inline_asm_gcc_x86(GMX_X86_GCC_INLINE_ASM)
22 if(GMX_X86_GCC_INLINE_ASM)
23 set(GCC_INLINE_ASM_DEFINE "-DGMX_X86_GCC_INLINE_ASM")
24 else(GMX_X86_GCC_INLINE_ASM)
25 set(GCC_INLINE_ASM_DEFINE "")
26 endif(GMX_X86_GCC_INLINE_ASM)
28 message(STATUS "Detecting best acceleration for this CPU")
30 # Get CPU acceleration information
31 try_run(GMX_CPUID_RUN_ACC GMX_CPUID_COMPILED
33 ${CMAKE_SOURCE_DIR}/src/gromacs/gmxlib/gmx_cpuid.c
34 COMPILE_DEFINITIONS "@GCC_INLINE_ASM_DEFINE@ -I${CMAKE_SOURCE_DIR}/src/gromacs/legacyheaders -DGMX_CPUID_STANDALONE -DGMX_IS_X86"
35 RUN_OUTPUT_VARIABLE OUTPUT_TMP
36 COMPILE_OUTPUT_VARIABLE GMX_CPUID_COMPILE_OUTPUT
39 if(NOT GMX_CPUID_COMPILED)
40 message(WARNING "Cannot compile CPUID code, which means no CPU-specific acceleration.")
41 message(STATUS "Compile output: ${GMX_CPUID_COMPILE_OUTPUT}")
42 set(OUTPUT_TMP "None")
43 elseif(NOT GMX_CPUID_RUN_ACC EQUAL 0)
44 message(WARNING "Cannot run CPUID code, which means no CPU-specific optimization.")
45 message(STATUS "Run output: ${OUTPUT_TMP}")
46 set(OUTPUT_TMP "None")
47 endif(NOT GMX_CPUID_COMPILED)
49 string(STRIP "@OUTPUT_TMP@" OUTPUT_ACC)
51 set(${_suggested_acceleration} "@OUTPUT_ACC@" PARENT_SCOPE)
52 message(STATUS "Detected best acceleration for this CPU - @OUTPUT_ACC@")
55 function(gmx_detect_acceleration _suggested_acceleration)
56 if(NOT DEFINED GMX_CPU_ACCELERATION)
58 set(${_suggested_acceleration} "IBM_QPX")
60 gmx_suggest_x86_acceleration(${_suggested_acceleration})
62 set(${_suggested_acceleration} "None")
65 set(${_suggested_acceleration} ${${_suggested_acceleration}} PARENT_SCOPE)