aboutsummaryrefslogtreecommitdiffstats
path: root/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Target/R600/AMDGPUISelDAGToDAG.cpp')
-rw-r--r--lib/Target/R600/AMDGPUISelDAGToDAG.cpp127
1 files changed, 111 insertions, 16 deletions
diff --git a/lib/Target/R600/AMDGPUISelDAGToDAG.cpp b/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
index b5ab703..7341cd9 100644
--- a/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
+++ b/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
@@ -95,7 +95,8 @@ private:
SDValue &Idxen, SDValue &Addr64, SDValue &GLC, SDValue &SLC,
SDValue &TFE) const;
bool SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc, SDValue &VAddr,
- SDValue &SOffset, SDValue &Offset) const;
+ SDValue &SOffset, SDValue &Offset, SDValue &GLC,
+ SDValue &SLC, SDValue &TFE) const;
bool SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc,
SDValue &VAddr, SDValue &SOffset, SDValue &Offset,
SDValue &SLC) const;
@@ -120,6 +121,11 @@ private:
SDNode *SelectADD_SUB_I64(SDNode *N);
SDNode *SelectDIV_SCALE(SDNode *N);
+ SDNode *getS_BFE(unsigned Opcode, SDLoc DL, SDValue Val,
+ uint32_t Offset, uint32_t Width);
+ SDNode *SelectS_BFEFromShifts(SDNode *N);
+ SDNode *SelectS_BFE(SDNode *N);
+
// Include the pieces autogenerated from the target description.
#include "AMDGPUGenDAGISel.inc"
};
@@ -519,21 +525,11 @@ SDNode *AMDGPUDAGToDAGISel::Select(SDNode *N) {
bool Signed = Opc == AMDGPUISD::BFE_I32;
- // Transformation function, pack the offset and width of a BFE into
- // the format expected by the S_BFE_I32 / S_BFE_U32. In the second
- // source, bits [5:0] contain the offset and bits [22:16] the width.
-
uint32_t OffsetVal = Offset->getZExtValue();
uint32_t WidthVal = Width->getZExtValue();
- uint32_t PackedVal = OffsetVal | WidthVal << 16;
-
- SDValue PackedOffsetWidth = CurDAG->getTargetConstant(PackedVal, MVT::i32);
- return CurDAG->getMachineNode(Signed ? AMDGPU::S_BFE_I32 : AMDGPU::S_BFE_U32,
- SDLoc(N),
- MVT::i32,
- N->getOperand(0),
- PackedOffsetWidth);
+ return getS_BFE(Signed ? AMDGPU::S_BFE_I32 : AMDGPU::S_BFE_U32, SDLoc(N),
+ N->getOperand(0), OffsetVal, WidthVal);
}
case AMDGPUISD::DIV_SCALE: {
@@ -547,6 +543,14 @@ SDNode *AMDGPUDAGToDAGISel::Select(SDNode *N) {
}
case ISD::ADDRSPACECAST:
return SelectAddrSpaceCast(N);
+ case ISD::AND:
+ case ISD::SRL:
+ case ISD::SRA:
+ if (N->getValueType(0) != MVT::i32 ||
+ Subtarget->getGeneration() < AMDGPUSubtarget::SOUTHERN_ISLANDS)
+ break;
+
+ return SelectS_BFE(N);
}
return SelectCode(N);
@@ -966,8 +970,9 @@ void AMDGPUDAGToDAGISel::SelectMUBUF(SDValue Addr, SDValue &Ptr,
bool AMDGPUDAGToDAGISel::SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc,
SDValue &VAddr, SDValue &SOffset,
- SDValue &Offset) const {
- SDValue Ptr, Offen, Idxen, Addr64, GLC, SLC, TFE;
+ SDValue &Offset, SDValue &GLC,
+ SDValue &SLC, SDValue &TFE) const {
+ SDValue Ptr, Offen, Idxen, Addr64;
SelectMUBUF(Addr, Ptr, VAddr, SOffset, Offset, Offen, Idxen, Addr64,
GLC, SLC, TFE);
@@ -991,8 +996,9 @@ bool AMDGPUDAGToDAGISel::SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc,
SDValue &Offset,
SDValue &SLC) const {
SLC = CurDAG->getTargetConstant(0, MVT::i1);
+ SDValue GLC, TFE;
- return SelectMUBUFAddr64(Addr, SRsrc, VAddr, SOffset, Offset);
+ return SelectMUBUFAddr64(Addr, SRsrc, VAddr, SOffset, Offset, GLC, SLC, TFE);
}
bool AMDGPUDAGToDAGISel::SelectMUBUFScratch(SDValue Addr, SDValue &Rsrc,
@@ -1147,6 +1153,95 @@ SDNode *AMDGPUDAGToDAGISel::SelectAddrSpaceCast(SDNode *N) {
return CurDAG->getNode(ISD::BITCAST, DL, DestVT, Src).getNode();
}
+SDNode *AMDGPUDAGToDAGISel::getS_BFE(unsigned Opcode, SDLoc DL, SDValue Val,
+ uint32_t Offset, uint32_t Width) {
+ // Transformation function, pack the offset and width of a BFE into
+ // the format expected by the S_BFE_I32 / S_BFE_U32. In the second
+ // source, bits [5:0] contain the offset and bits [22:16] the width.
+ uint32_t PackedVal = Offset | (Width << 16);
+ SDValue PackedConst = CurDAG->getTargetConstant(PackedVal, MVT::i32);
+
+ return CurDAG->getMachineNode(Opcode, DL, MVT::i32, Val, PackedConst);
+}
+
+SDNode *AMDGPUDAGToDAGISel::SelectS_BFEFromShifts(SDNode *N) {
+ // "(a << b) srl c)" ---> "BFE_U32 a, (c-b), (32-c)
+ // "(a << b) sra c)" ---> "BFE_I32 a, (c-b), (32-c)
+ // Predicate: 0 < b <= c < 32
+
+ const SDValue &Shl = N->getOperand(0);
+ ConstantSDNode *B = dyn_cast<ConstantSDNode>(Shl->getOperand(1));
+ ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
+
+ if (B && C) {
+ uint32_t BVal = B->getZExtValue();
+ uint32_t CVal = C->getZExtValue();
+
+ if (0 < BVal && BVal <= CVal && CVal < 32) {
+ bool Signed = N->getOpcode() == ISD::SRA;
+ unsigned Opcode = Signed ? AMDGPU::S_BFE_I32 : AMDGPU::S_BFE_U32;
+
+ return getS_BFE(Opcode, SDLoc(N), Shl.getOperand(0),
+ CVal - BVal, 32 - CVal);
+ }
+ }
+ return SelectCode(N);
+}
+
+SDNode *AMDGPUDAGToDAGISel::SelectS_BFE(SDNode *N) {
+ switch (N->getOpcode()) {
+ case ISD::AND:
+ if (N->getOperand(0).getOpcode() == ISD::SRL) {
+ // "(a srl b) & mask" ---> "BFE_U32 a, b, popcount(mask)"
+ // Predicate: isMask(mask)
+ const SDValue &Srl = N->getOperand(0);
+ ConstantSDNode *Shift = dyn_cast<ConstantSDNode>(Srl.getOperand(1));
+ ConstantSDNode *Mask = dyn_cast<ConstantSDNode>(N->getOperand(1));
+
+ if (Shift && Mask) {
+ uint32_t ShiftVal = Shift->getZExtValue();
+ uint32_t MaskVal = Mask->getZExtValue();
+
+ if (isMask_32(MaskVal)) {
+ uint32_t WidthVal = countPopulation(MaskVal);
+
+ return getS_BFE(AMDGPU::S_BFE_U32, SDLoc(N), Srl.getOperand(0),
+ ShiftVal, WidthVal);
+ }
+ }
+ }
+ break;
+ case ISD::SRL:
+ if (N->getOperand(0).getOpcode() == ISD::AND) {
+ // "(a & mask) srl b)" ---> "BFE_U32 a, b, popcount(mask >> b)"
+ // Predicate: isMask(mask >> b)
+ const SDValue &And = N->getOperand(0);
+ ConstantSDNode *Shift = dyn_cast<ConstantSDNode>(N->getOperand(1));
+ ConstantSDNode *Mask = dyn_cast<ConstantSDNode>(And->getOperand(1));
+
+ if (Shift && Mask) {
+ uint32_t ShiftVal = Shift->getZExtValue();
+ uint32_t MaskVal = Mask->getZExtValue() >> ShiftVal;
+
+ if (isMask_32(MaskVal)) {
+ uint32_t WidthVal = countPopulation(MaskVal);
+
+ return getS_BFE(AMDGPU::S_BFE_U32, SDLoc(N), And.getOperand(0),
+ ShiftVal, WidthVal);
+ }
+ }
+ } else if (N->getOperand(0).getOpcode() == ISD::SHL)
+ return SelectS_BFEFromShifts(N);
+ break;
+ case ISD::SRA:
+ if (N->getOperand(0).getOpcode() == ISD::SHL)
+ return SelectS_BFEFromShifts(N);
+ break;
+ }
+
+ return SelectCode(N);
+}
+
bool AMDGPUDAGToDAGISel::SelectVOP3Mods(SDValue In, SDValue &Src,
SDValue &SrcMods) const {
generated by cgit v1.1 at 2024-05-18 03:31:32 +0000