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X86: Lower SMUL_LOHI of v4i32 to pmuldq when SSE4.1 is available.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207318 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2014-04-26 14:12:19 +00:00
parent fb625eadf9
commit 9f2c21871c
5 changed files with 105 additions and 16 deletions
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24
lib/Target/X86/X86ISelLowering.cpp
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@ -1062,6 +1062,7 @@ void X86TargetLowering::resetOperationActions() {
// FIXME: Do we need to handle scalar-to-vector here?
setOperationAction(ISD::MUL, MVT::v4i32, Legal);
setOperationAction(ISD::SMUL_LOHI, MVT::v4i32, Custom);
setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
setOperationAction(ISD::VSELECT, MVT::v2i64, Legal);
@ -1227,6 +1228,7 @@ void X86TargetLowering::resetOperationActions() {
// Don't lower v32i8 because there is no 128-bit byte mul
setOperationAction(ISD::UMUL_LOHI, MVT::v8i32, Custom);
setOperationAction(ISD::SMUL_LOHI, MVT::v8i32, Custom);
setOperationAction(ISD::MULHU, MVT::v16i16, Legal);
setOperationAction(ISD::MULHS, MVT::v16i16, Legal);
@ -11729,6 +11731,11 @@ static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
return DAG.getNode(X86ISD::PMULUDQ, dl, Op.getValueType(),
Op.getOperand(1), Op.getOperand(2));
case Intrinsic::x86_sse41_pmuldq:
case Intrinsic::x86_avx2_pmul_dq:
return DAG.getNode(X86ISD::PMULDQ, dl, Op.getValueType(),
Op.getOperand(1), Op.getOperand(2));
case Intrinsic::x86_sse2_pmulhu_w:
case Intrinsic::x86_avx2_pmulhu_w:
return DAG.getNode(ISD::MULHU, dl, Op.getValueType(),
@ -13168,8 +13175,8 @@ static SDValue LowerMUL(SDValue Op, const X86Subtarget *Subtarget,
return DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
}
static SDValue LowerUMUL_LOHI(SDValue Op, const X86Subtarget *Subtarget,
SelectionDAG &DAG) {
static SDValue LowerMUL_LOHI(SDValue Op, const X86Subtarget *Subtarget,
SelectionDAG &DAG) {
SDValue Op0 = Op.getOperand(0), Op1 = Op.getOperand(1);
EVT VT = Op0.getValueType();
SDLoc dl(Op);
@ -13185,15 +13192,17 @@ static SDValue LowerUMUL_LOHI(SDValue Op, const X86Subtarget *Subtarget,
// Emit two multiplies, one for the lower 2 ints and one for the higher 2
// ints.
MVT MulVT = VT == MVT::v4i32 ? MVT::v2i64 : MVT::v4i64;
unsigned Opcode =
Op->getOpcode() == ISD::UMUL_LOHI ? X86ISD::PMULUDQ : X86ISD::PMULDQ;
SDValue Mul1 = DAG.getNode(ISD::BITCAST, dl, VT,
DAG.getNode(X86ISD::PMULUDQ, dl, MulVT, Op0, Op1));
DAG.getNode(Opcode, dl, MulVT, Op0, Op1));
SDValue Mul2 = DAG.getNode(ISD::BITCAST, dl, VT,
DAG.getNode(X86ISD::PMULUDQ, dl, MulVT, Hi0, Hi1));
DAG.getNode(Opcode, dl, MulVT, Hi0, Hi1));
// Shuffle it back into the right order.
const int HighMask[] = {1, 3, 5, 7, 9, 11, 13, 15};
const int HighMask[] = {1, 5, 3, 7, 9, 13, 11, 15};
SDValue Highs = DAG.getVectorShuffle(VT, dl, Mul1, Mul2, HighMask);
const int LowMask[] = {0, 2, 4, 6, 8, 10, 12, 14};
const int LowMask[] = {0, 4, 2, 6, 8, 12, 10, 14};
SDValue Lows = DAG.getVectorShuffle(VT, dl, Mul1, Mul2, LowMask);
return DAG.getNode(ISD::MERGE_VALUES, dl, Op.getValueType(), Highs, Lows);
@ -14188,7 +14197,8 @@ SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ_ZERO_UNDEF(Op, DAG);
case ISD::CTTZ: return LowerCTTZ(Op, DAG);
case ISD::MUL: return LowerMUL(Op, Subtarget, DAG);
case ISD::UMUL_LOHI: return LowerUMUL_LOHI(Op, Subtarget, DAG);
case ISD::UMUL_LOHI:
case ISD::SMUL_LOHI: return LowerMUL_LOHI(Op, Subtarget, DAG);
case ISD::SRA:
case ISD::SRL:
case ISD::SHL: return LowerShift(Op, Subtarget, DAG);

2
lib/Target/X86/X86ISelLowering.h
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@ -347,6 +347,8 @@ namespace llvm {
// PMULUDQ - Vector multiply packed unsigned doubleword integers
PMULUDQ,
// PMULUDQ - Vector multiply packed signed doubleword integers
PMULDQ,
// FMA nodes
FMADD,

3
lib/Target/X86/X86InstrFragmentsSIMD.td
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@ -175,6 +175,9 @@ def X86select : SDNode<"X86ISD::SELECT" , SDTSelect>;
def X86pmuludq : SDNode<"X86ISD::PMULUDQ",
SDTypeProfile<1, 2, [SDTCisVec<0>, SDTCisVec<1>,
SDTCisSameAs<1,2>]>>;
def X86pmuldq : SDNode<"X86ISD::PMULDQ",
SDTypeProfile<1, 2, [SDTCisVec<0>, SDTCisVec<1>,
SDTCisSameAs<1,2>]>>;
// Specific shuffle nodes - At some point ISD::VECTOR_SHUFFLE will always get
// translated into one of the target nodes below during lowering.

41
lib/Target/X86/X86InstrSSE.td
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@ -7003,6 +7003,31 @@ multiclass SS48I_binop_rm<bits<8> opc, string OpcodeStr, SDNode OpNode,
Sched<[itins.Sched.Folded, ReadAfterLd]>;
}
/// SS48I_binop_rm2 - Simple SSE41 binary operator with different src and dst
/// types.
multiclass SS48I_binop_rm2<bits<8> opc, string OpcodeStr, SDNode OpNode,
ValueType DstVT, ValueType SrcVT, RegisterClass RC,
PatFrag memop_frag, X86MemOperand x86memop,
OpndItins itins,
bit IsCommutable = 0, bit Is2Addr = 1> {
let isCommutable = IsCommutable in
def rr : SS48I<opc, MRMSrcReg, (outs RC:$dst),
(ins RC:$src1, RC:$src2),
!if(Is2Addr,
!strconcat(OpcodeStr, "\t{$src2, $dst|$dst, $src2}"),
!strconcat(OpcodeStr, "\t{$src2, $src1, $dst|$dst, $src1, $src2}")),
[(set RC:$dst, (DstVT (OpNode (SrcVT RC:$src1), RC:$src2)))]>,
Sched<[itins.Sched]>;
def rm : SS48I<opc, MRMSrcMem, (outs RC:$dst),
(ins RC:$src1, x86memop:$src2),
!if(Is2Addr,
!strconcat(OpcodeStr, "\t{$src2, $dst|$dst, $src2}"),
!strconcat(OpcodeStr, "\t{$src2, $src1, $dst|$dst, $src1, $src2}")),
[(set RC:$dst, (DstVT (OpNode (SrcVT RC:$src1),
(bitconvert (memop_frag addr:$src2)))))]>,
Sched<[itins.Sched.Folded, ReadAfterLd]>;
}
let Predicates = [HasAVX] in {
let isCommutable = 0 in
defm VPACKUSDW : SS41I_binop_rm_int<0x2B, "vpackusdw", int_x86_sse41_packusdw,
@ -7031,8 +7056,9 @@ let Predicates = [HasAVX] in {
defm VPMAXUW : SS48I_binop_rm<0x3E, "vpmaxuw", X86umax, v8i16, VR128,
loadv2i64, i128mem, 0, SSE_INTALU_ITINS_P>,
VEX_4V;
defm VPMULDQ : SS41I_binop_rm_int<0x28, "vpmuldq", int_x86_sse41_pmuldq,
0, DEFAULT_ITINS_VECIMULSCHED>, VEX_4V;
defm VPMULDQ : SS48I_binop_rm2<0x28, "vpmuldq", X86pmuldq, v2i64, v4i32,
VR128, loadv2i64, i128mem,
SSE_INTMUL_ITINS_P, 1, 0>, VEX_4V;
}
let Predicates = [HasAVX2] in {
@ -7064,9 +7090,9 @@ let Predicates = [HasAVX2] in {
defm VPMAXUWY : SS48I_binop_rm<0x3E, "vpmaxuw", X86umax, v16i16, VR256,
loadv4i64, i256mem, 0, SSE_INTALU_ITINS_P>,
VEX_4V, VEX_L;
defm VPMULDQ : SS41I_binop_rm_int_y<0x28, "vpmuldq",
int_x86_avx2_pmul_dq, WriteVecIMul>,
VEX_4V, VEX_L;
defm VPMULDQY : SS48I_binop_rm2<0x28, "vpmuldq", X86pmuldq, v4i64, v8i32,
VR256, loadv4i64, i256mem,
SSE_INTMUL_ITINS_P, 1, 0>, VEX_4V, VEX_L;
}
let Constraints = "$src1 = $dst" in {
@ -7089,8 +7115,9 @@ let Constraints = "$src1 = $dst" in {
memopv2i64, i128mem, 1, SSE_INTALU_ITINS_P>;
defm PMAXUW : SS48I_binop_rm<0x3E, "pmaxuw", X86umax, v8i16, VR128,
memopv2i64, i128mem, 1, SSE_INTALU_ITINS_P>;
defm PMULDQ : SS41I_binop_rm_int<0x28, "pmuldq", int_x86_sse41_pmuldq,
1, SSE_INTMUL_ITINS_P>;
defm PMULDQ : SS48I_binop_rm2<0x28, "pmuldq", X86pmuldq, v2i64, v4i32,
VR128, memopv2i64, i128mem,
SSE_INTMUL_ITINS_P, 1>;
}
let Predicates = [HasAVX] in {

51
test/CodeGen/X86/vector-idiv.ll
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@ -1,4 +1,4 @@
; RUN: llc -march=x86-64 -mcpu=core2 < %s | FileCheck %s -check-prefix=SSE
; RUN: llc -march=x86-64 -mcpu=corei7 < %s | FileCheck %s -check-prefix=SSE
; RUN: llc -march=x86-64 -mcpu=core-avx2 < %s | FileCheck %s -check-prefix=AVX
define <4 x i32> @test1(<4 x i32> %a) {
@ -103,4 +103,51 @@ define <16 x i16> @test6(<16 x i16> %a) {
; AVX-NOT: vpmulhw
}
; TODO: sdiv -> pmuldq
define <16 x i8> @test7(<16 x i8> %a) {
%div = sdiv <16 x i8> %a, <i8 7, i8 7, i8 7, i8 7,i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7,i8 7, i8 7, i8 7, i8 7>
ret <16 x i8> %div
}
define <4 x i32> @test8(<4 x i32> %a) {
%div = sdiv <4 x i32> %a, <i32 7, i32 7, i32 7, i32 7>
ret <4 x i32> %div
; SSE-LABEL: test8:
; SSE: pmuldq
; SSE: pshufd $57
; SSE: pmuldq
; SSE: shufps $-35
; SSE: pshufd $-40
; SSE: padd
; SSE: psrld $31
; SSE: psrad $2
; SSE: padd
; AVX-LABEL: test8:
; AVX: vpmuldq
; AVX: vpshufd $57
; AVX: vpmuldq
; AVX: vshufps $-35
; AVX: vpshufd $-40
; AVX: vpadd
; AVX: vpsrld $31
; AVX: vpsrad $2
; AVX: vpadd
}
define <8 x i32> @test9(<8 x i32> %a) {
%div = sdiv <8 x i32> %a, <i32 7, i32 7, i32 7, i32 7,i32 7, i32 7, i32 7, i32 7>
ret <8 x i32> %div
; AVX-LABEL: test9:
; AVX: vpermd
; AVX: vpmuldq
; AVX: vshufps $-35
; AVX: vpmuldq
; AVX: vshufps $-35
; AVX: vpshufd $-40
; AVX: vpadd
; AVX: vpsrld $31
; AVX: vpsrad $2
; AVX: vpadd
}