Author: Timm Baeder Date: 2024-09-30T20:07:28+02:00 New Revision: 85181788576151cc4b52d38d9b52d04f26179530
URL: https://github.com/llvm/llvm-project/commit/85181788576151cc4b52d38d9b52d04f26179530 DIFF: https://github.com/llvm/llvm-project/commit/85181788576151cc4b52d38d9b52d04f26179530.diff LOG: [clang][bytecode] Implement ia32_bextr builitns (#110513) Added: Modified: clang/lib/AST/ByteCode/InterpBuiltin.cpp Removed: ################################################################################ diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp b/clang/lib/AST/ByteCode/InterpBuiltin.cpp index 82ed6d9e7a2ff4..eb59cf3e9b1e3d 100644 --- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp +++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp @@ -14,6 +14,7 @@ #include "clang/AST/OSLog.h" #include "clang/AST/RecordLayout.h" #include "clang/Basic/Builtins.h" +#include "clang/Basic/TargetBuiltins.h" #include "clang/Basic/TargetInfo.h" #include "llvm/Support/SipHash.h" @@ -1152,6 +1153,33 @@ static bool interp__builtin_is_aligned_up_down(InterpState &S, CodePtr OpPC, return false; } +static bool interp__builtin_ia32_bextr(InterpState &S, CodePtr OpPC, + const InterpFrame *Frame, + const Function *Func, + const CallExpr *Call) { + PrimType ValT = *S.Ctx.classify(Call->getArg(0)); + PrimType IndexT = *S.Ctx.classify(Call->getArg(1)); + APSInt Val = peekToAPSInt(S.Stk, ValT, + align(primSize(ValT)) + align(primSize(IndexT))); + APSInt Index = peekToAPSInt(S.Stk, IndexT); + + unsigned BitWidth = Val.getBitWidth(); + uint64_t Shift = Index.extractBitsAsZExtValue(8, 0); + uint64_t Length = Index.extractBitsAsZExtValue(8, 8); + Length = Length > BitWidth ? BitWidth : Length; + + // Handle out of bounds cases. + if (Length == 0 || Shift >= BitWidth) { + pushInteger(S, 0, Call->getType()); + return true; + } + + uint64_t Result = Val.getZExtValue() >> Shift; + Result &= llvm::maskTrailingOnes<uint64_t>(Length); + pushInteger(S, Result, Call->getType()); + return true; +} + static bool interp__builtin_os_log_format_buffer_size(InterpState &S, CodePtr OpPC, const InterpFrame *Frame, @@ -1737,6 +1765,14 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC, const Function *F, return false; break; + case clang::X86::BI__builtin_ia32_bextr_u32: + case clang::X86::BI__builtin_ia32_bextr_u64: + case clang::X86::BI__builtin_ia32_bextri_u32: + case clang::X86::BI__builtin_ia32_bextri_u64: + if (!interp__builtin_ia32_bextr(S, OpPC, Frame, F, Call)) + return false; + break; + case Builtin::BI__builtin_os_log_format_buffer_size: if (!interp__builtin_os_log_format_buffer_size(S, OpPC, Frame, F, Call)) return false; _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
