ayzhao created this revision.
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ayzhao requested review of this revision.
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cpuid implementation complete, still have a cannot compile this function yet
WORK IN PROGRESS
DO NOT REVIEW
DO NOT MERGE
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D121653
Files:
clang/include/clang/Basic/BuiltinsX86.def
clang/lib/CodeGen/CGBuiltin.cpp
clang/lib/Headers/intrin.h
clang/test/CodeGen/X86/ms-x86-intrinsics.c
Index: clang/test/CodeGen/X86/ms-x86-intrinsics.c
===================================================================
--- clang/test/CodeGen/X86/ms-x86-intrinsics.c
+++ clang/test/CodeGen/X86/ms-x86-intrinsics.c
@@ -63,6 +63,14 @@
// CHECK: [[RES:%[0-9]+]] = mul nuw i64 [[Y]], [[X]]
// CHECK: ret i64 [[RES]]
+void test__cpuid(int cpuInfo[4], int function_id) {
+ return __cpuid(cpuInfo, function_id);
+}
+
+void test__cpuidex(int cpuInfo[4], int function_id, int subfunction_id) {
+ return __cpuidex(cpuInfo, function_id, subfunction_id);
+}
+
#if defined(__x86_64__)
char test__readgsbyte(unsigned long Offset) {
Index: clang/lib/Headers/intrin.h
===================================================================
--- clang/lib/Headers/intrin.h
+++ clang/lib/Headers/intrin.h
@@ -548,13 +548,6 @@
: "=a"(__eax), "=r"(__ebx), "=c"(__ecx), "=d"(__edx) \
: "0"(__leaf), "2"(__count))
#endif
-static __inline__ void __DEFAULT_FN_ATTRS __cpuid(int __info[4], int __level) {
- __cpuid_count(__level, 0, __info[0], __info[1], __info[2], __info[3]);
-}
-static __inline__ void __DEFAULT_FN_ATTRS __cpuidex(int __info[4], int __level,
- int __ecx) {
- __cpuid_count(__level, __ecx, __info[0], __info[1], __info[2], __info[3]);
-}
static __inline__ void __DEFAULT_FN_ATTRS __halt(void) {
__asm__ volatile("hlt");
}
Index: clang/lib/CodeGen/CGBuiltin.cpp
===================================================================
--- clang/lib/CodeGen/CGBuiltin.cpp
+++ clang/lib/CodeGen/CGBuiltin.cpp
@@ -14912,6 +14912,45 @@
return EmitX86Select(*this, Ops[2], Res, Ops[1]);
}
+ case X86::BI__cpuid:
+ case X86::BI__cpuidex: {
+ Value *FuncIdArg = EmitScalarExpr(E->getArg(1));
+ Value *SubFuncIdArg = BuiltinID == X86::BI__cpuidex
+ ? EmitScalarExpr(E->getArg(2))
+ : llvm::ConstantInt::get(Int32Ty, 0);
+
+ // Build the assembly for the cpuid instruction
+ SmallString<5> Asm("cpuid");
+ std::string Constraints = "={ax},={bx},={cx},={dx},{ax},{cx}";
+ std::string MachineClobbers = getTarget().getClobbers();
+ if (!MachineClobbers.empty()) {
+ Constraints += ',';
+ Constraints += MachineClobbers;
+ }
+
+ llvm::StructType *CpuidRetTy =
+ llvm::StructType::get(Int32Ty, Int32Ty, Int32Ty, Int32Ty);
+ llvm::FunctionType *FTy =
+ llvm::FunctionType::get(CpuidRetTy, {Int32Ty, Int32Ty}, false);
+
+ llvm::InlineAsm *IA =
+ llvm::InlineAsm::get(FTy, Asm, Constraints, /*hasSideEffects=*/true);
+ llvm::Value *IACall = Builder.CreateCall(IA, {FuncIdArg, SubFuncIdArg});
+
+ Value *BasePtr = EmitScalarExpr(E->getArg(0));
+
+ for (uint32_t i = 0; i < 4; i++) {
+ Value *Extracted = Builder.CreateExtractValue(IACall, {i});
+ Value *StorePtr =
+ i == 0 ? BasePtr
+ : Builder.CreateInBoundsGEP(
+ Int32Ty, BasePtr, llvm::ConstantInt::get(Int32Ty, i));
+ Builder.CreateAlignedStore(Extracted, StorePtr, getIntAlign());
+ }
+
+ return nullptr;
+ }
+
case X86::BI__emul:
case X86::BI__emulu: {
llvm::Type *Int64Ty = llvm::IntegerType::get(getLLVMContext(), 64);
Index: clang/include/clang/Basic/BuiltinsX86.def
===================================================================
--- clang/include/clang/Basic/BuiltinsX86.def
+++ clang/include/clang/Basic/BuiltinsX86.def
@@ -2071,6 +2071,9 @@
TARGET_HEADER_BUILTIN(_ReadBarrier, "v", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(_WriteBarrier, "v", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(__cpuid, "vi*i", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(__cpuidex, "vi*ii", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+
TARGET_HEADER_BUILTIN(__emul, "LLiii", "nch", "intrin.h", ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(__emulu, "ULLiUiUi", "nch", "intrin.h", ALL_MS_LANGUAGES, "")
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