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Facored out get_default_microarchitecture

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Moved `generic` -> `x86-64-v2` selection into its own procedure so that `llvm_backend.cpp` and `main.cpp` can share the same logic.
This commit is contained in:
Jeroen van Rijn
2023-11-10 20:14:00 +01:00
parent e19460cbd7
commit f903951016
3 changed files with 35 additions and 28 deletions
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src/llvm_backend.cpp
+20 -15
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@@ -21,6 +21,25 @@
#include "llvm_backend_stmt.cpp"
#include "llvm_backend_proc.cpp"
char *get_default_microarchitecture() {
char * default_march = "generic";
if (build_context.metrics.arch == TargetArch_amd64) {
// NOTE(bill): x86-64-v2 is more than enough for everyone
//
// x86-64: CMOV, CMPXCHG8B, FPU, FXSR, MMX, FXSR, SCE, SSE, SSE2
// x86-64-v2: (close to Nehalem) CMPXCHG16B, LAHF-SAHF, POPCNT, SSE3, SSE4.1, SSE4.2, SSSE3
// x86-64-v3: (close to Haswell) AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE, XSAVE
// x86-64-v4: AVX512F, AVX512BW, AVX512CD, AVX512DQ, AVX512VL
if (ODIN_LLVM_MINIMUM_VERSION_12) {
if (build_context.metrics.os == TargetOs_freestanding) {
default_march = "x86-64";
} else {
default_march = "x86-64-v2";
}
}
}
return default_march;
}
gb_internal void lb_add_foreign_library_path(lbModule *m, Entity *e) {
if (e == nullptr) {
@@ -2491,7 +2510,7 @@ gb_internal bool lb_generate_code(lbGenerator *gen) {
}
char const *host_cpu_name = LLVMGetHostCPUName();
char const *llvm_cpu = "generic";
char const *llvm_cpu = get_default_microarchitecture();
char const *llvm_features = "";
if (build_context.microarch.len != 0) {
if (build_context.microarch == "native") {
@@ -2502,20 +2521,6 @@ gb_internal bool lb_generate_code(lbGenerator *gen) {
if (gb_strcmp(llvm_cpu, host_cpu_name) == 0) {
llvm_features = LLVMGetHostCPUFeatures();
}
} else if (build_context.metrics.arch == TargetArch_amd64) {
// NOTE(bill): x86-64-v2 is more than enough for everyone
//
// x86-64: CMOV, CMPXCHG8B, FPU, FXSR, MMX, FXSR, SCE, SSE, SSE2
// x86-64-v2: (close to Nehalem) CMPXCHG16B, LAHF-SAHF, POPCNT, SSE3, SSE4.1, SSE4.2, SSSE3
// x86-64-v3: (close to Haswell) AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE, XSAVE
// x86-64-v4: AVX512F, AVX512BW, AVX512CD, AVX512DQ, AVX512VL
if (ODIN_LLVM_MINIMUM_VERSION_12) {
if (build_context.metrics.os == TargetOs_freestanding) {
llvm_cpu = "x86-64";
} else {
llvm_cpu = "x86-64-v2";
}
}
}
// NOTE(Jeroen): Uncomment to get the list of supported microarchitectures.