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[FMV][AArch64] Run the aarch64-init-cpu-features test on Linux. #172

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Merged
merged 1 commit into from
Oct 15, 2024
Merged

[FMV][AArch64] Run the aarch64-init-cpu-features test on Linux. #172

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18 changes: 14 additions & 4 deletions SingleSource/Benchmarks/Misc/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -35,10 +35,20 @@ if(NOT ARCH STREQUAL "PowerPC" OR NOT TARGET_OS STREQUAL "Darwin")
list(APPEND Source dt.c)
endif()
if(ARCH STREQUAL "AArch64")
file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/CheckHaveAArch64FMV.h "void __init_cpu_features_resolver(void);")
check_symbol_exists(__init_cpu_features_resolver ${CMAKE_CURRENT_BINARY_DIR}/CheckHaveAArch64FMV.h HAVE_AARCH64_FMV)
if(HAVE_AARCH64_FMV AND TARGET_OS STREQUAL "Darwin")
list(APPEND Source aarch64-init-cpu-features.c)
if(TARGET_OS STREQUAL "Darwin")
file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/CheckHasAArch64FMV.h "void __init_cpu_features_resolver(void);")
check_symbol_exists(__init_cpu_features_resolver ${CMAKE_CURRENT_BINARY_DIR}/CheckHasAArch64FMV.h HAS_AARCH64_FMV)
if(HAS_AARCH64_FMV)
list(APPEND CFLAGS -DHAS_DARWIN_FMV)
list(APPEND Source aarch64-init-cpu-features.c)
endif()
elseif(TARGET_OS STREQUAL "Linux")
file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/CheckHasAArch64FMV.h "void __init_cpu_features(void);")
check_symbol_exists(__init_cpu_features ${CMAKE_CURRENT_BINARY_DIR}/CheckHasAArch64FMV.h HAS_AARCH64_FMV)
if(HAS_AARCH64_FMV)
list(APPEND CFLAGS -DHAS_LINUX_FMV)
list(APPEND Source aarch64-init-cpu-features.c)
endif()
endif()
endif()
llvm_singlesource()
14 changes: 10 additions & 4 deletions SingleSource/Benchmarks/Misc/aarch64-init-cpu-features.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4,15 +4,21 @@ extern struct {
unsigned long long features;
} __aarch64_cpu_features;

void __init_cpu_features_resolver(void);
#if HAS_DARWIN_FMV
# define RUNTIME_INIT __init_cpu_features_resolver
#elif HAS_LINUX_FMV
# define RUNTIME_INIT __init_cpu_features
#endif

void RUNTIME_INIT(void);

int main() {
__init_cpu_features_resolver();
RUNTIME_INIT();
const unsigned long long first = __aarch64_cpu_features.features;

// Manually reset it, so we can check that the result is consistent.
__aarch64_cpu_features.features = 0;
__init_cpu_features_resolver();
RUNTIME_INIT();

if (__aarch64_cpu_features.features != first) {
printf("FAILED consistency test: 0x%llx != 0x%llx\n", first,
Expand All @@ -24,6 +30,6 @@ int main() {
// per-iteration measurement in microseconds.
for (int i = 0; i < 1000000; i++) {
__aarch64_cpu_features.features = 0;
__init_cpu_features_resolver();
RUNTIME_INIT();
}
}