setOperationAction(ISD::FLOG10, MVT::f80, Expand);
setOperationAction(ISD::FEXP, MVT::f80, Expand);
setOperationAction(ISD::FEXP2, MVT::f80, Expand);
+ setOperationAction(ISD::FMINNUM, MVT::f80, Expand);
+ setOperationAction(ISD::FMAXNUM, MVT::f80, Expand);
// First set operation action for all vector types to either promote
// (for widening) or expand (for scalarization). Then we will selectively
setOperationAction(ISD::UMULO, VT, Custom);
}
- // There are no 8-bit 3-address imul/mul instructions
- setOperationAction(ISD::SMULO, MVT::i8, Expand);
- setOperationAction(ISD::UMULO, MVT::i8, Expand);
if (!Subtarget->is64Bit()) {
// These libcalls are not available in 32-bit.
"a sorted mask where the broadcast "
"comes from V1.");
- // Check if this is a broadcast of a scalar. We special case lowering for
- // scalars so that we can more effectively fold with loads.
+ // Go up the chain of (vector) values to try and find a scalar load that
+ // we can combine with the broadcast.
+ for (;;) {
+ switch (V.getOpcode()) {
+ case ISD::CONCAT_VECTORS: {
+ int OperandSize = Mask.size() / V.getNumOperands();
+ V = V.getOperand(BroadcastIdx / OperandSize);
+ BroadcastIdx %= OperandSize;
+ continue;
+ }
+
+ case ISD::INSERT_SUBVECTOR: {
+ SDValue VOuter = V.getOperand(0), VInner = V.getOperand(1);
+ auto ConstantIdx = dyn_cast<ConstantSDNode>(V.getOperand(2));
+ if (!ConstantIdx)
+ break;
+
+ int BeginIdx = (int)ConstantIdx->getZExtValue();
+ int EndIdx =
+ BeginIdx + (int)VInner.getValueType().getVectorNumElements();
+ if (BroadcastIdx >= BeginIdx && BroadcastIdx < EndIdx) {
+ BroadcastIdx -= BeginIdx;
+ V = VInner;
+ } else {
+ V = VOuter;
+ }
+ continue;
+ }
+ }
+ break;
+ }
+
+ // Check if this is a broadcast of a scalar. We special case lowering
+ // for scalars so that we can more effectively fold with loads.
if (V.getOpcode() == ISD::BUILD_VECTOR ||
- (V.getOpcode() == ISD::SCALAR_TO_VECTOR && BroadcastIdx == 0)) {
+ (V.getOpcode() == ISD::SCALAR_TO_VECTOR && BroadcastIdx == 0)) {
V = V.getOperand(BroadcastIdx);
// If the scalar isn't a load we can't broadcast from it in AVX1, only with
// Try to use rotation instructions if available.
if (Subtarget->hasSSSE3())
- if (SDValue Rotate = lowerVectorShuffleAsByteRotate(DL, MVT::v8i16, V1, V2, Mask, DAG))
+ if (SDValue Rotate = lowerVectorShuffleAsByteRotate(
+ DL, MVT::v8i16, V1, V2, Mask, DAG))
return Rotate;
if (NumV1Inputs + NumV2Inputs <= 4)
// Try to use rotation instructions if available.
if (Subtarget->hasSSSE3())
- if (SDValue Rotate = lowerVectorShuffleAsByteRotate(DL, MVT::v16i8, V1, V2,
- OrigMask, DAG))
+ if (SDValue Rotate = lowerVectorShuffleAsByteRotate(
+ DL, MVT::v16i8, V1, V2, OrigMask, DAG))
return Rotate;
// Try to use a zext lowering.
return DAG.getNode(X86ISD::SAHF, dl, MVT::i32, TruncSrl);
}
+/// The minimum architected relative accuracy is 2^-12. We need one
+/// Newton-Raphson step to have a good float result (24 bits of precision).
+SDValue X86TargetLowering::getRsqrtEstimate(SDValue Op,
+ DAGCombinerInfo &DCI,
+ unsigned &RefinementSteps,
+ bool &UseOneConstNR) const {
+ // FIXME: We should use instruction latency models to calculate the cost of
+ // each potential sequence, but this is very hard to do reliably because
+ // at least Intel's Core* chips have variable timing based on the number of
+ // significant digits in the divisor and/or sqrt operand.
+ if (!Subtarget->useSqrtEst())
+ return SDValue();
+
+ EVT VT = Op.getValueType();
+
+ // SSE1 has rsqrtss and rsqrtps.
+ // TODO: Add support for AVX512 (v16f32).
+ // It is likely not profitable to do this for f64 because a double-precision
+ // rsqrt estimate with refinement on x86 prior to FMA requires at least 16
+ // instructions: convert to single, rsqrtss, convert back to double, refine
+ // (3 steps = at least 13 insts). If an 'rsqrtsd' variant was added to the ISA
+ // along with FMA, this could be a throughput win.
+ if ((Subtarget->hasSSE1() && (VT == MVT::f32 || VT == MVT::v4f32)) ||
+ (Subtarget->hasAVX() && VT == MVT::v8f32)) {
+ RefinementSteps = 1;
+ UseOneConstNR = false;
+ return DCI.DAG.getNode(X86ISD::FRSQRT, SDLoc(Op), VT, Op);
+ }
+ return SDValue();
+}
+
static bool isAllOnes(SDValue V) {
ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
return C && C->isAllOnesValue();
Cond = X86::COND_B;
break;
case ISD::SMULO:
- BaseOp = X86ISD::SMUL;
+ BaseOp = N->getValueType(0) == MVT::i8 ? X86ISD::SMUL8 : X86ISD::SMUL;
Cond = X86::COND_O;
break;
case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
+ if (N->getValueType(0) == MVT::i8) {
+ BaseOp = X86ISD::UMUL8;
+ Cond = X86::COND_O;
+ break;
+ }
SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
MVT::i32);
SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
TargetLowering::TargetLoweringOpt TLO(DAG, DCI.isBeforeLegalize(),
DCI.isBeforeLegalizeOps());
if (TLO.ShrinkDemandedConstant(Cond, DemandedMask) ||
- TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne, TLO))
+ (TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne,
+ TLO) &&
+ // Don't optimize vector of constants. Those are handled by
+ // the generic code and all the bits must be properly set for
+ // the generic optimizer.
+ !ISD::isBuildVectorOfConstantSDNodes(TLO.New.getNode())))
DCI.CommitTargetLoweringOpt(TLO);
}