https://github.com/tbaederr created
https://github.com/llvm/llvm-project/pull/110675
None
>From e57f67c73af56e510943612e4eff651838706b9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <tbae...@redhat.com>
Date: Tue, 1 Oct 2024 15:41:43 +0200
Subject: [PATCH] [clang][bytecode] Implement ia32_{pdep,pext} builtins
---
clang/lib/AST/ByteCode/InterpBuiltin.cpp | 54 ++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index 347b23d7b89c46..ebc800623f0d48 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -1219,6 +1219,48 @@ static bool interp__builtin_ia32_tzcnt(InterpState &S,
CodePtr OpPC,
return true;
}
+static bool interp__builtin_ia32_pdep(InterpState &S, CodePtr OpPC,
+ const InterpFrame *Frame,
+ const Function *Func,
+ const CallExpr *Call) {
+ PrimType ValT = *S.Ctx.classify(Call->getArg(0));
+ PrimType MaskT = *S.Ctx.classify(Call->getArg(1));
+
+ APSInt Val =
+ peekToAPSInt(S.Stk, ValT, align(primSize(ValT)) +
align(primSize(MaskT)));
+ APSInt Mask = peekToAPSInt(S.Stk, MaskT);
+
+ unsigned BitWidth = Val.getBitWidth();
+ APInt Result = APInt::getZero(BitWidth);
+ for (unsigned I = 0, P = 0; I != BitWidth; ++I) {
+ if (Mask[I])
+ Result.setBitVal(I, Val[P++]);
+ }
+ pushInteger(S, Result, Call->getType());
+ return true;
+}
+
+static bool interp__builtin_ia32_pext(InterpState &S, CodePtr OpPC,
+ const InterpFrame *Frame,
+ const Function *Func,
+ const CallExpr *Call) {
+ PrimType ValT = *S.Ctx.classify(Call->getArg(0));
+ PrimType MaskT = *S.Ctx.classify(Call->getArg(1));
+
+ APSInt Val =
+ peekToAPSInt(S.Stk, ValT, align(primSize(ValT)) +
align(primSize(MaskT)));
+ APSInt Mask = peekToAPSInt(S.Stk, MaskT);
+
+ unsigned BitWidth = Val.getBitWidth();
+ APInt Result = APInt::getZero(BitWidth);
+ for (unsigned I = 0, P = 0; I != BitWidth; ++I) {
+ if (Mask[I])
+ Result.setBitVal(P++, Val[I]);
+ }
+ pushInteger(S, Result, Call->getType());
+ return true;
+}
+
static bool interp__builtin_os_log_format_buffer_size(InterpState &S,
CodePtr OpPC,
const InterpFrame *Frame,
@@ -1832,6 +1874,18 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC,
const Function *F,
return false;
break;
+ case clang::X86::BI__builtin_ia32_pdep_si:
+ case clang::X86::BI__builtin_ia32_pdep_di:
+ if (!interp__builtin_ia32_pdep(S, OpPC, Frame, F, Call))
+ return false;
+ break;
+
+ case clang::X86::BI__builtin_ia32_pext_si:
+ case clang::X86::BI__builtin_ia32_pext_di:
+ if (!interp__builtin_ia32_pext(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;
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