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Add preliminary v2i32 support for SPU backend. As there are no

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such registers in SPU, this support boils down to "emulating" 
them by duplicating instructions on the general purpose registers. 

This adds the most basic operations on v2i32: passing parameters,
addition, subtraction, multiplication and a few others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110035 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kalle Raiskila 2010-08-02 08:54:39 +00:00
parent ee56c42168
commit 82fe467ca5
5 changed files with 106 additions and 6 deletions
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2
lib/Target/CellSPU/SPUCallingConv.td
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@ -37,7 +37,7 @@ def RetCC_SPU : CallingConv<[
//===----------------------------------------------------------------------===//
def CCC_SPU : CallingConv<[
CCIfType<[i8, i16, i32, i64, i128, f32, f64,
v16i8, v8i16, v4i32, v4f32, v2i64, v2f64],
v16i8, v8i16, v4i32, v4f32, v2i64, v2f64, v2i32],
CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10, R11,
R12, R13, R14, R15, R16, R17, R18, R19, R20,
R21, R22, R23, R24, R25, R26, R27, R28, R29,

19
lib/Target/CellSPU/SPUISelLowering.cpp
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@ -1067,6 +1067,7 @@ SPUTargetLowering::LowerFormalArguments(SDValue Chain,
case MVT::v4i32:
case MVT::v8i16:
case MVT::v16i8:
case MVT::v2i32:
ArgRegClass = &SPU::VECREGRegClass;
break;
}
@ -1622,8 +1623,7 @@ LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) {
return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, T, T, T, T);
}
case MVT::v2i32: {
SDValue T = DAG.getConstant(unsigned(SplatBits), VT.getVectorElementType());
return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, T, T);
return SDValue();
}
case MVT::v2i64: {
return SPU::LowerV2I64Splat(VT, DAG, SplatBits, dl);
@ -1768,6 +1768,9 @@ static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
} else if (EltVT == MVT::i16) {
V2EltIdx0 = 8;
maskVT = MVT::v8i16;
} else if (VecVT == MVT::v2i32 || VecVT == MVT::v2f32 ) {
V2EltIdx0 = 2;
maskVT = MVT::v4i32;
} else if (EltVT == MVT::i32 || EltVT == MVT::f32) {
V2EltIdx0 = 4;
maskVT = MVT::v4i32;
@ -1847,6 +1850,15 @@ static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
for (unsigned j = 0; j < BytesPerElement; ++j)
ResultMask.push_back(DAG.getConstant(SrcElt*BytesPerElement+j,MVT::i8));
}
// For half vectors padd the mask with zeros for the second half.
// This is needed because mask is assumed to be full vector elsewhere in
// the SPU backend.
if(VecVT == MVT::v2i32 || VecVT == MVT::v2f32)
for( unsigned i = 0; i < 2; ++i )
{
for (unsigned j = 0; j < BytesPerElement; ++j)
ResultMask.push_back(DAG.getConstant(0,MVT::i8));
}
SDValue VPermMask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v16i8,
&ResultMask[0], ResultMask.size());
@ -1877,6 +1889,7 @@ static SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
case MVT::v4f32: n_copies = 4; VT = MVT::f32; break;
case MVT::v2i64: n_copies = 2; VT = MVT::i64; break;
case MVT::v2f64: n_copies = 2; VT = MVT::f64; break;
case MVT::v2i32: n_copies = 2; VT = MVT::i32; break;
}
SDValue CValue = DAG.getConstant(CN->getZExtValue(), VT);
@ -1997,7 +2010,7 @@ static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
// Variable index: Rotate the requested element into slot 0, then replicate
// slot 0 across the vector
EVT VecVT = N.getValueType();
if (!VecVT.isSimple() || !VecVT.isVector() || !VecVT.is128BitVector()) {
if (!VecVT.isSimple() || !VecVT.isVector()) {
report_fatal_error("LowerEXTRACT_VECTOR_ELT: Must have a simple, 128-bit"
"vector type!");
}

24
lib/Target/CellSPU/SPUInstrInfo.td
View File

@ -607,7 +607,7 @@ class ARegInst<RegisterClass rclass>:
multiclass AddInstruction {
def v4i32: AVecInst<v4i32>;
def v16i8: AVecInst<v16i8>;
def v2i32: AVecInst<v2i32>;
def r32: ARegInst<R32C>;
}
@ -672,6 +672,12 @@ def SFvec : RRForm<0b00000010000, (outs VECREG:$rT),
"sf\t$rT, $rA, $rB", IntegerOp,
[(set (v4i32 VECREG:$rT), (sub (v4i32 VECREG:$rB), (v4i32 VECREG:$rA)))]>;
def SF2vec : RRForm<0b00000010000, (outs VECREG:$rT),
(ins VECREG:$rA, VECREG:$rB),
"sf\t$rT, $rA, $rB", IntegerOp,
[(set (v2i32 VECREG:$rT), (sub (v2i32 VECREG:$rB), (v2i32 VECREG:$rA)))]>;
def SFr32 : RRForm<0b00000010000, (outs R32C:$rT), (ins R32C:$rA, R32C:$rB),
"sf\t$rT, $rA, $rB", IntegerOp,
[(set R32C:$rT, (sub R32C:$rB, R32C:$rA))]>;
@ -829,6 +835,10 @@ def MPYUv4i32:
MPYUInst<(outs VECREG:$rT), (ins VECREG:$rA, VECREG:$rB),
[/* no pattern */]>;
def MPYUv2i32:
MPYUInst<(outs VECREG:$rT), (ins VECREG:$rA, VECREG:$rB),
[/* no pattern */]>;
def MPYUr16:
MPYUInst<(outs R32C:$rT), (ins R16C:$rA, R16C:$rB),
[(set R32C:$rT, (mul (zext R16C:$rA), (zext R16C:$rB)))]>;
@ -908,6 +918,10 @@ def MPYHv4i32:
MPYHInst<(outs VECREG:$rT), (ins VECREG:$rA, VECREG:$rB),
[/* no pattern */]>;
def MPYHv2i32:
MPYHInst<(outs VECREG:$rT), (ins VECREG:$rA, VECREG:$rB),
[/* no pattern */]>;
def MPYHr32:
MPYHInst<(outs R32C:$rT), (ins R32C:$rA, R32C:$rB),
[/* no pattern */]>;
@ -1561,6 +1575,9 @@ def : Pat<(v8i16 (SPUprefslot2vec R16C:$rA)),
def : Pat<(v4i32 (SPUprefslot2vec R32C:$rA)),
(ORv4i32_i32 R32C:$rA)>;
def : Pat<(v2i32 (SPUprefslot2vec R32C:$rA)),
(ORv4i32_i32 R32C:$rA)>;
def : Pat<(v2i64 (SPUprefslot2vec R64C:$rA)),
(ORv2i64_i64 R64C:$rA)>;
@ -1582,6 +1599,9 @@ def : Pat<(SPUvec2prefslot (v8i16 VECREG:$rA)),
def : Pat<(SPUvec2prefslot (v4i32 VECREG:$rA)),
(ORi32_v4i32 VECREG:$rA)>;
def : Pat<(SPUvec2prefslot (v2i32 VECREG:$rA)),
(ORi32_v4i32 VECREG:$rA)>;
def : Pat<(SPUvec2prefslot (v2i64 VECREG:$rA)),
(ORi64_v2i64 VECREG:$rA)>;
@ -2123,6 +2143,8 @@ multiclass ShuffleBytes
def v8i16_m32 : SHUFBVecInst<v8i16, v4i32>;
def v4i32 : SHUFBVecInst<v4i32, v16i8>;
def v4i32_m32 : SHUFBVecInst<v4i32, v4i32>;
def v2i32 : SHUFBVecInst<v2i32, v16i8>;
def v2i32_m32 : SHUFBVecInst<v2i32, v4i32>;
def v2i64 : SHUFBVecInst<v2i64, v16i8>;
def v2i64_m32 : SHUFBVecInst<v2i64, v4i32>;

10
lib/Target/CellSPU/SPUMathInstr.td
View File

@ -39,7 +39,7 @@ def : Pat<(mul (v8i16 VECREG:$rA), (v8i16 VECREG:$rB)),
(FSMBIv8i16 0xcccc))>;
//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
// v4i32, i32 multiply instruction sequence:
// v4i32, v2i32, i32 multiply instruction sequence:
//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
def MPYv4i32:
@ -49,6 +49,14 @@ def MPYv4i32:
(v4i32 (MPYHv4i32 VECREG:$rB, VECREG:$rA)))),
(v4i32 (MPYUv4i32 VECREG:$rA, VECREG:$rB)))>;
def MPYv2i32:
Pat<(mul (v2i32 VECREG:$rA), (v2i32 VECREG:$rB)),
(Av2i32
(v2i32 (Av2i32 (v2i32 (MPYHv2i32 VECREG:$rA, VECREG:$rB)),
(v2i32 (MPYHv2i32 VECREG:$rB, VECREG:$rA)))),
(v2i32 (MPYUv2i32 VECREG:$rA, VECREG:$rB)))>;
def MPYi32:
Pat<(mul R32C:$rA, R32C:$rB),
(Ar32

57
test/CodeGen/CellSPU/v2i32.ll Normal file
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@ -0,0 +1,57 @@
;RUN: llc --march=cellspu %s -o - | FileCheck %s
%vec = type <2 x i32>
define %vec @test_ret(%vec %param)
{
;CHECK: bi $lr
ret %vec %param
}
define %vec @test_add(%vec %param)
{
;CHECK: a $3, $3, $3
%1 = add %vec %param, %param
;CHECK: bi $lr
ret %vec %1
}
define %vec @test_sub(%vec %param)
{
;CHECK: sf $3, $4, $3
%1 = sub %vec %param, <i32 1, i32 1>
;CHECK: bi $lr
ret %vec %1
}
define %vec @test_mul(%vec %param)
{
;CHECK: mpyu
;CHECK: mpyh
;CHECK: a
;CHECK: a $3
%1 = mul %vec %param, %param
;CHECK: bi $lr
ret %vec %1
}
define <2 x i32> @test_splat(i32 %param ) {
;TODO insertelement transforms to a PREFSLOT2VEC, that trasforms to the
; somewhat redundant:
;CHECK-NOT or $3, $3, $3
;CHECK: lqa
;CHECK: shufb
%sv = insertelement <1 x i32> undef, i32 %param, i32 0
%rv = shufflevector <1 x i32> %sv, <1 x i32> undef, <2 x i32> zeroinitializer
;CHECK: bi $lr
ret <2 x i32> %rv
}
define i32 @test_extract() {
;CHECK: shufb $3
%rv = extractelement <2 x i32> zeroinitializer, i32 undef ; <i32> [#uses=1]
;CHECK: bi $lr
ret i32 %rv
}