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CellSPU:

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- First patch from Nehal Desai, a new contributor at Aerospace. Nehal's patch
  fixes sign/zero/any-extending loads for integers and floating point. Example
  code, compiled w/o debugging or optimization where he first noticed the bug:

  int main(void) {
    float a = 99.0;
    printf("%d\n", a);
    return 0;
  }

  Verified that this code actually works on a Cell SPU.

Changes by Scott Michel:
- Fix bug in the value type list constructed by SPUISD::LDRESULT to include
  both the load result's result and chain, not just the chain alone.
- Simplify LowerLOAD and remove extraneous and unnecessary chains.
- Remove unused SPUISD pseudo instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60526 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Scott Michel 2008-12-04 03:02:42 +00:00
parent 80e201b8db
commit 30ee7df71c
5 changed files with 56 additions and 133 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Target/CellSPU/SPUISelDAGToDAG.cpp
View File

@ -676,7 +676,7 @@ SPUDAGToDAGISel::Select(SDValue Op) {
Result = CurDAG->getTargetNode(Opc, VT, MVT::Other, Arg, Zero, Chain);
} else {
Result = CurDAG->getTargetNode(Opc, MVT::Other, Arg, Arg, Chain);
Result = CurDAG->getTargetNode(Opc, VT, MVT::Other, Arg, Arg, Chain);
}
Chain = SDValue(Result, 1);

120
lib/Target/CellSPU/SPUISelLowering.cpp
View File

@ -436,12 +436,6 @@ SPUTargetLowering::getTargetNodeName(unsigned Opcode) const
node_names[(unsigned) SPUISD::CNTB] = "SPUISD::CNTB";
node_names[(unsigned) SPUISD::PROMOTE_SCALAR] = "SPUISD::PROMOTE_SCALAR";
node_names[(unsigned) SPUISD::VEC2PREFSLOT] = "SPUISD::VEC2PREFSLOT";
node_names[(unsigned) SPUISD::VEC2PREFSLOT_CHAINED]
= "SPUISD::VEC2PREFSLOT_CHAINED";
node_names[(unsigned) SPUISD::EXTRACT_I1_ZEXT] = "SPUISD::EXTRACT_I1_ZEXT";
node_names[(unsigned) SPUISD::EXTRACT_I1_SEXT] = "SPUISD::EXTRACT_I1_SEXT";
node_names[(unsigned) SPUISD::EXTRACT_I8_ZEXT] = "SPUISD::EXTRACT_I8_ZEXT";
node_names[(unsigned) SPUISD::EXTRACT_I8_SEXT] = "SPUISD::EXTRACT_I8_SEXT";
node_names[(unsigned) SPUISD::MPY] = "SPUISD::MPY";
node_names[(unsigned) SPUISD::MPYU] = "SPUISD::MPYU";
node_names[(unsigned) SPUISD::MPYH] = "SPUISD::MPYH";
@ -458,8 +452,6 @@ SPUTargetLowering::getTargetNodeName(unsigned Opcode) const
node_names[(unsigned) SPUISD::ROTQUAD_RZ_BITS] =
"SPUISD::ROTQUAD_RZ_BITS";
node_names[(unsigned) SPUISD::ROTBYTES_LEFT] = "SPUISD::ROTBYTES_LEFT";
node_names[(unsigned) SPUISD::ROTBYTES_LEFT_CHAINED] =
"SPUISD::ROTBYTES_LEFT_CHAINED";
node_names[(unsigned) SPUISD::ROTBYTES_LEFT_BITS] =
"SPUISD::ROTBYTES_LEFT_BITS";
node_names[(unsigned) SPUISD::SELECT_MASK] = "SPUISD::SELECT_MASK";
@ -597,13 +589,24 @@ AlignedLoad(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST,
/*!
All CellSPU loads and stores are aligned to 16-byte boundaries, so for elements
within a 16-byte block, we have to rotate to extract the requested element.
*/
For extending loads, we also want to ensure that the following sequence is
emitted, e.g. for MVT::f32 extending load to MVT::f64:
\verbatim
%1 v16i8,ch = load
%2 v16i8,ch = rotate %1
%3 v4f8, ch = bitconvert %2
%4 f32 = vec2perfslot %3
%5 f64 = fp_extend %4
\endverbatim
*/
static SDValue
LowerLOAD(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
LoadSDNode *LN = cast<LoadSDNode>(Op);
SDValue the_chain = LN->getChain();
MVT VT = LN->getMemoryVT();
MVT OpVT = Op.getNode()->getValueType(0);
MVT InVT = LN->getMemoryVT();
MVT OutVT = Op.getValueType();
ISD::LoadExtType ExtType = LN->getExtensionType();
unsigned alignment = LN->getAlignment();
SDValue Ops[8];
@ -613,7 +616,8 @@ LowerLOAD(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
int offset, rotamt;
bool was16aligned;
SDValue result =
AlignedLoad(Op, DAG, ST, LN,alignment, offset, rotamt, VT, was16aligned);
AlignedLoad(Op, DAG, ST, LN,alignment, offset, rotamt, InVT,
was16aligned);
if (result.getNode() == 0)
return result;
@ -625,57 +629,40 @@ LowerLOAD(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
if (rotamt != 0 || !was16aligned) {
SDVTList vecvts = DAG.getVTList(MVT::v16i8, MVT::Other);
Ops[0] = the_chain;
Ops[1] = result;
Ops[0] = result;
if (was16aligned) {
Ops[2] = DAG.getConstant(rotamt, MVT::i16);
Ops[1] = DAG.getConstant(rotamt, MVT::i16);
} else {
MVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
LoadSDNode *LN1 = cast<LoadSDNode>(result);
Ops[2] = DAG.getNode(ISD::ADD, PtrVT, LN1->getBasePtr(),
Ops[1] = DAG.getNode(ISD::ADD, PtrVT, LN1->getBasePtr(),
DAG.getConstant(rotamt, PtrVT));
}
result = DAG.getNode(SPUISD::ROTBYTES_LEFT_CHAINED, vecvts, Ops, 3);
the_chain = result.getValue(1);
result = DAG.getNode(SPUISD::ROTBYTES_LEFT, MVT::v16i8, Ops, 2);
}
if (VT == OpVT || ExtType == ISD::EXTLOAD) {
SDVTList scalarvts;
MVT vecVT = MVT::v16i8;
// Convert the loaded v16i8 vector to the appropriate vector type
// specified by the operand:
MVT vecVT = MVT::getVectorVT(InVT, (128 / InVT.getSizeInBits()));
result = DAG.getNode(SPUISD::VEC2PREFSLOT, InVT,
DAG.getNode(ISD::BIT_CONVERT, vecVT, result));
// Convert the loaded v16i8 vector to the appropriate vector type
// specified by the operand:
if (OpVT == VT) {
if (VT != MVT::i1)
vecVT = MVT::getVectorVT(VT, (128 / VT.getSizeInBits()));
} else
vecVT = MVT::getVectorVT(OpVT, (128 / OpVT.getSizeInBits()));
// Handle extending loads by extending the scalar result:
if (ExtType == ISD::SEXTLOAD) {
result = DAG.getNode(ISD::SIGN_EXTEND, OutVT, result);
} else if (ExtType == ISD::ZEXTLOAD) {
result = DAG.getNode(ISD::ZERO_EXTEND, OutVT, result);
} else if (ExtType == ISD::EXTLOAD) {
unsigned NewOpc = ISD::ANY_EXTEND;
Ops[0] = the_chain;
Ops[1] = DAG.getNode(ISD::BIT_CONVERT, vecVT, result);
scalarvts = DAG.getVTList((OpVT == VT ? VT : OpVT), MVT::Other);
result = DAG.getNode(SPUISD::VEC2PREFSLOT_CHAINED, scalarvts, Ops, 2);
the_chain = result.getValue(1);
} else {
// Handle the sign and zero-extending loads for i1 and i8:
unsigned NewOpC;
if (OutVT.isFloatingPoint())
NewOpc = ISD::FP_EXTEND;
if (ExtType == ISD::SEXTLOAD) {
NewOpC = (OpVT == MVT::i1
? SPUISD::EXTRACT_I1_SEXT
: SPUISD::EXTRACT_I8_SEXT);
} else {
assert(ExtType == ISD::ZEXTLOAD);
NewOpC = (OpVT == MVT::i1
? SPUISD::EXTRACT_I1_ZEXT
: SPUISD::EXTRACT_I8_ZEXT);
}
result = DAG.getNode(NewOpC, OpVT, result);
result = DAG.getNode(NewOpc, OutVT, result);
}
SDVTList retvts = DAG.getVTList(OpVT, MVT::Other);
SDVTList retvts = DAG.getVTList(OutVT, MVT::Other);
SDValue retops[2] = {
result,
the_chain
@ -3034,10 +3021,16 @@ SPUTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const
SDValue combinedConst =
DAG.getConstant(CN0->getZExtValue() + CN1->getZExtValue(), Op0VT);
DEBUG(cerr << "Replace: (add " << CN0->getZExtValue() << ", "
<< "(SPUindirect <arg>, " << CN1->getZExtValue() << "))\n");
DEBUG(cerr << "With: (SPUindirect <arg>, "
<< CN0->getZExtValue() + CN1->getZExtValue() << ")\n");
#if defined(NDEBUG)
if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
cerr << "\n"
<< "Replace: (add " << CN0->getZExtValue() << ", "
<< "(SPUindirect <arg>, " << CN1->getZExtValue() << "))\n"
<< "With: (SPUindirect <arg>, "
<< CN0->getZExtValue() + CN1->getZExtValue() << ")\n";
}
#endif
return DAG.getNode(SPUISD::IndirectAddr, Op0VT,
Op0.getOperand(0), combinedConst);
}
@ -3071,11 +3064,14 @@ SPUTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const
// (any_extend (SPUextract_elt0 <arg>)) ->
// (SPUextract_elt0 <arg>)
// Types must match, however...
DEBUG(cerr << "Replace: ");
DEBUG(N->dump(&DAG));
DEBUG(cerr << "\nWith: ");
DEBUG(Op0.getNode()->dump(&DAG));
DEBUG(cerr << "\n");
#if defined(NDEBUG)
if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
cerr << "\nReplace: ";
N->dump(&DAG);
cerr << "\nWith: ";
Op0.getNode()->dump(&DAG);
cerr << "\n";
#endif
return Op0;
}
@ -3243,8 +3239,7 @@ SPUTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
}
case SPUISD::LDRESULT:
case SPUISD::VEC2PREFSLOT:
case SPUISD::VEC2PREFSLOT_CHAINED: {
case SPUISD::VEC2PREFSLOT: {
MVT OpVT = Op.getValueType();
unsigned OpVTBits = OpVT.getSizeInBits();
uint64_t InMask = OpVT.getIntegerVTBitMask();
@ -3254,10 +3249,6 @@ SPUTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
}
#if 0
case EXTRACT_I1_ZEXT:
case EXTRACT_I1_SEXT:
case EXTRACT_I8_ZEXT:
case EXTRACT_I8_SEXT:
case MPY:
case MPYU:
case MPYH:
@ -3272,7 +3263,6 @@ SPUTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
case SPUISD::ROTQUAD_RZ_BYTES:
case SPUISD::ROTQUAD_RZ_BITS:
case SPUISD::ROTBYTES_LEFT:
case SPUISD::ROTBYTES_LEFT_CHAINED:
case SPUISD::SELECT_MASK:
case SPUISD::SELB:
case SPUISD::FPInterp:

6
lib/Target/CellSPU/SPUISelLowering.h
View File

@ -41,11 +41,6 @@ namespace llvm {
CNTB, ///< Count leading ones in bytes
PROMOTE_SCALAR, ///< Promote scalar->vector
VEC2PREFSLOT, ///< Extract element 0
VEC2PREFSLOT_CHAINED, ///< Extract element 0, with chain
EXTRACT_I1_ZEXT, ///< Extract element 0 as i1, zero extend
EXTRACT_I1_SEXT, ///< Extract element 0 as i1, sign extend
EXTRACT_I8_ZEXT, ///< Extract element 0 as i8, zero extend
EXTRACT_I8_SEXT, ///< Extract element 0 as i8, sign extend
MPY, ///< 16-bit Multiply (low parts of a 32-bit)
MPYU, ///< Multiply Unsigned
MPYH, ///< Multiply High
@ -60,7 +55,6 @@ namespace llvm {
ROTQUAD_RZ_BYTES, ///< Rotate quad right, by bytes, zero fill
ROTQUAD_RZ_BITS, ///< Rotate quad right, by bits, zero fill
ROTBYTES_LEFT, ///< Rotate bytes (loads -> ROTQBYI)
ROTBYTES_LEFT_CHAINED, ///< Rotate bytes (loads -> ROTQBYI), with chain
ROTBYTES_LEFT_BITS, ///< Rotate bytes left by bit shift count
SELECT_MASK, ///< Select Mask (FSM, FSMB, FSMH, FSMBI)
SELB, ///< Select bits -> (b & mask) | (a & ~mask)

49
lib/Target/CellSPU/SPUInstrInfo.td
View File

@ -1288,39 +1288,21 @@ def : Pat<(v2f64 (SPUpromote_scalar R64FP:$rA)),
def : Pat<(SPUvec2prefslot (v16i8 VECREG:$rA)),
(ORi8_v16i8 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot_chained (v16i8 VECREG:$rA)),
(ORi8_v16i8 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot (v8i16 VECREG:$rA)),
(ORi16_v8i16 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot_chained (v8i16 VECREG:$rA)),
(ORi16_v8i16 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot (v4i32 VECREG:$rA)),
(ORi32_v4i32 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot_chained (v4i32 VECREG:$rA)),
(ORi32_v4i32 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot (v2i64 VECREG:$rA)),
(ORi64_v2i64 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot_chained (v2i64 VECREG:$rA)),
(ORi64_v2i64 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot (v4f32 VECREG:$rA)),
(ORf32_v4f32 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot_chained (v4f32 VECREG:$rA)),
(ORf32_v4f32 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot (v2f64 VECREG:$rA)),
(ORf64_v2f64 VECREG:$rA, VECREG:$rA)>;
def : Pat<(SPUvec2prefslot_chained (v2f64 VECREG:$rA)),
(ORf64_v2f64 VECREG:$rA, VECREG:$rA)>;
// ORC: Bitwise "or" with complement (c = a | ~b)
class ORCInst<dag OOL, dag IOL, list<dag> pattern>:
@ -2147,15 +2129,6 @@ multiclass RotateQuadLeftByBytes
defm ROTQBY: RotateQuadLeftByBytes;
def : Pat<(SPUrotbytes_left_chained (v16i8 VECREG:$rA), R32C:$rB),
(ROTQBYv16i8 VECREG:$rA, R32C:$rB)>;
def : Pat<(SPUrotbytes_left_chained (v8i16 VECREG:$rA), R32C:$rB),
(ROTQBYv8i16 VECREG:$rA, R32C:$rB)>;
def : Pat<(SPUrotbytes_left_chained (v4i32 VECREG:$rA), R32C:$rB),
(ROTQBYv4i32 VECREG:$rA, R32C:$rB)>;
def : Pat<(SPUrotbytes_left_chained (v2i64 VECREG:$rA), R32C:$rB),
(ROTQBYv2i64 VECREG:$rA, R32C:$rB)>;
//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
// Rotate quad by byte (count), immediate
//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
@ -2179,15 +2152,6 @@ multiclass RotateQuadByBytesImm
defm ROTQBYI: RotateQuadByBytesImm;
def : Pat<(SPUrotbytes_left_chained (v16i8 VECREG:$rA), (i16 uimm7:$val)),
(ROTQBYIv16i8 VECREG:$rA, uimm7:$val)>;
def : Pat<(SPUrotbytes_left_chained (v8i16 VECREG:$rA), (i16 uimm7:$val)),
(ROTQBYIv8i16 VECREG:$rA, uimm7:$val)>;
def : Pat<(SPUrotbytes_left_chained (v4i32 VECREG:$rA), (i16 uimm7:$val)),
(ROTQBYIv4i32 VECREG:$rA, uimm7:$val)>;
def : Pat<(SPUrotbytes_left_chained (v2i64 VECREG:$rA), (i16 uimm7:$val)),
(ROTQBYIv2i64 VECREG:$rA, uimm7:$val)>;
// See ROTQBY note above.
class ROTQBYBIInst<dag OOL, dag IOL, list<dag> pattern>:
RI7Form<0b00110011100, OOL, IOL,
@ -3972,10 +3936,6 @@ def : Pat<(ret),
// Zero/Any/Sign extensions
//===----------------------------------------------------------------------===//
// zext 1->32: Zero extend i1 to i32
def : Pat<(SPUextract_i1_zext R32C:$rSrc),
(ANDIr32 R32C:$rSrc, 0x1)>;
// sext 8->32: Sign extend bytes to words
def : Pat<(sext_inreg R32C:$rSrc, i8),
(XSHWr32 (XSBHr32 R32C:$rSrc))>;
@ -3983,19 +3943,10 @@ def : Pat<(sext_inreg R32C:$rSrc, i8),
def : Pat<(i32 (sext R8C:$rSrc)),
(XSHWr16 (XSBHr8 R8C:$rSrc))>;
def : Pat<(SPUextract_i8_sext VECREG:$rSrc),
(XSHWr32 (XSBHr32 (ORi32_v4i32 (v4i32 VECREG:$rSrc),
(v4i32 VECREG:$rSrc))))>;
// zext 8->16: Zero extend bytes to halfwords
def : Pat<(i16 (zext R8C:$rSrc)),
(ANDHIi8i16 R8C:$rSrc, 0xff)>;
// zext 8->32 from preferred slot in load/store
def : Pat<(SPUextract_i8_zext VECREG:$rSrc),
(ANDIr32 (ORi32_v4i32 (v4i32 VECREG:$rSrc), (v4i32 VECREG:$rSrc)),
0xff)>;
// zext 8->32: Zero extend bytes to words
def : Pat<(i32 (zext R8C:$rSrc)),
(ANDIi8i32 R8C:$rSrc, 0xff)>;

12
lib/Target/CellSPU/SPUNodes.td
View File

@ -125,11 +125,6 @@ def SPUrotquad_rz_bits: SDNode<"SPUISD::ROTQUAD_RZ_BITS",
def SPUrotbytes_left: SDNode<"SPUISD::ROTBYTES_LEFT",
SPUvecshift_type, []>;
// Same as above, but the node also has a chain associated (used in loads and
// stores)
def SPUrotbytes_left_chained : SDNode<"SPUISD::ROTBYTES_LEFT_CHAINED",
SPUvecshift_type, [SDNPHasChain]>;
// Vector rotate left by bytes, but the count is given in bits and the SPU
// internally converts it to bytes (saves an instruction to mask off lower
// three bits)
@ -153,13 +148,6 @@ def SPUpromote_scalar: SDNode<"SPUISD::PROMOTE_SCALAR", SDTpromote_scalar, []>;
def SPU_vec_demote : SDTypeProfile<1, 1, []>;
def SPUvec2prefslot: SDNode<"SPUISD::VEC2PREFSLOT", SPU_vec_demote, []>;
def SPU_vec_demote_chained : SDTypeProfile<1, 2, []>;
def SPUvec2prefslot_chained: SDNode<"SPUISD::VEC2PREFSLOT_CHAINED",
SPU_vec_demote_chained, [SDNPHasChain]>;
def SPUextract_i1_sext: SDNode<"SPUISD::EXTRACT_I1_SEXT", SPU_vec_demote, []>;
def SPUextract_i1_zext: SDNode<"SPUISD::EXTRACT_I1_ZEXT", SPU_vec_demote, []>;
def SPUextract_i8_sext: SDNode<"SPUISD::EXTRACT_I8_SEXT", SPU_vec_demote, []>;
def SPUextract_i8_zext: SDNode<"SPUISD::EXTRACT_I8_ZEXT", SPU_vec_demote, []>;
// Address high and low components, used for [r+r] type addressing
def SPUhi : SDNode<"SPUISD::Hi", SDTIntBinOp, []>;