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intrinsic "_udiv128" Impl #119

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Merged
merged 2 commits into from
Jan 3, 2025
Merged

intrinsic "_udiv128" Impl #119

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acd37a3
Update BuiltinsX86_64.def
hzqst Dec 31, 2024
a2d6a83
Update CGBuiltin.cpp for _udiv128
hzqst Dec 31, 2024
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1 change: 1 addition & 0 deletions clang/include/clang/Basic/BuiltinsX86_64.def
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ TARGET_HEADER_BUILTIN(__mulh, "LLiLLiLLi", "nch", INTRIN_H, ALL_MS_LANGUAGES
TARGET_HEADER_BUILTIN(__umulh, "ULLiULLiULLi", "nch", INTRIN_H, ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(_mul128, "LLiLLiLLiLLi*", "nch", INTRIN_H, ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(_umul128, "ULLiULLiULLiULLi*", "nch", INTRIN_H, ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(_udiv128, "ULLiULLiULLiULLiULLi*", "nch", INTRIN_H, ALL_MS_LANGUAGES, "")

TARGET_HEADER_BUILTIN(__faststorefence, "v", "nh", INTRIN_H, ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(__shiftleft128, "ULLiULLiULLiUc", "nch", INTRIN_H, ALL_MS_LANGUAGES, "")
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31 changes: 31 additions & 0 deletions clang/lib/CodeGen/CGBuiltin.cpp
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Expand Up @@ -16024,6 +16024,37 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID,
return Builder.CreateIntCast(MulResult, ResType, IsSigned);
}

case X86::BI_udiv128: {
llvm::Type *ResType = ConvertType(E->getType());
llvm::Type *Int128Ty = llvm::IntegerType::get(getLLVMContext(), 128);
llvm::Type *Int64Ty = llvm::IntegerType::get(getLLVMContext(), 64);

// Retrieve operands
Value *HighDividend = Builder.CreateIntCast(Ops[0], Int128Ty, false);
Value *LowDividend = Builder.CreateZExt(Ops[1], Int128Ty);
Value *Divisor = Ops[2];

// Combine HighDividend and LowDividend into a 128-bit dividend
Value *Dividend = Builder.CreateShl(HighDividend, 64);
Dividend = Builder.CreateOr(Dividend, LowDividend);

// Create Divisor and extend it to 128-bit
Value *DivisorExt = Builder.CreateZExt(Divisor, Int128Ty);

// Perform division
Value *Quotient = Builder.CreateUDiv(Dividend, DivisorExt);
Value *Remainder = Builder.CreateURem(Dividend, DivisorExt);

// Truncate results to 64 bits
Quotient = Builder.CreateTrunc(Quotient, Int64Ty);
Remainder = Builder.CreateTrunc(Remainder, Int64Ty);

// Store remainder
Address RemainderAddr = EmitPointerWithAlignment(E->getArg(3));
Builder.CreateStore(Remainder, RemainderAddr);

return Quotient; // Return the quotient as the result
}
case X86::BI__faststorefence: {
return Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent,
llvm::SyncScope::System);
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