================
@@ -3674,6 +3750,55 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC,
const CallExpr *Call,
case Builtin::BI__builtin_elementwise_min:
return interp__builtin_elementwise_maxmin(S, OpPC, Call, BuiltinID);
+ case clang::X86::BI__builtin_ia32_phaddw128:
+ case clang::X86::BI__builtin_ia32_phaddw256:
+ case clang::X86::BI__builtin_ia32_phaddd128:
+ case clang::X86::BI__builtin_ia32_phaddd256:
+ return interp_builtin_horizontal_int_binop(
+ S, OpPC, Call,
+ [](const APSInt &LHS, const APSInt &RHS) { return LHS + RHS; });
+ case clang::X86::BI__builtin_ia32_phaddsw128:
+ case clang::X86::BI__builtin_ia32_phaddsw256:
+ return interp_builtin_horizontal_int_binop(
+ S, OpPC, Call, [](const APSInt &LHS, const APSInt &RHS) {
+ return LHS.isSigned() ? LHS.sadd_sat(RHS) : LHS.uadd_sat(RHS);
+ });
+ case clang::X86::BI__builtin_ia32_phsubw128:
+ case clang::X86::BI__builtin_ia32_phsubw256:
+ case clang::X86::BI__builtin_ia32_phsubd128:
+ case clang::X86::BI__builtin_ia32_phsubd256:
+ return interp_builtin_horizontal_int_binop(
+ S, OpPC, Call,
+ [](const APSInt &LHS, const APSInt &RHS) { return LHS - RHS; });
+ case clang::X86::BI__builtin_ia32_phsubsw128:
+ case clang::X86::BI__builtin_ia32_phsubsw256:
+ return interp_builtin_horizontal_int_binop(
+ S, OpPC, Call, [](const APSInt &LHS, const APSInt &RHS) {
+ return LHS.isSigned() ? LHS.ssub_sat(RHS) : LHS.usub_sat(RHS);
----------------
RKSimon wrote:
horizontal integer saturated add/sub are all signed operations - you don't need
usub_sat at all
https://github.com/llvm/llvm-project/pull/156822
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