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R600: Add support for local memory atomic add

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190080 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2013-09-05 18:38:09 +00:00
parent 756f382ac1
commit 79916948e1
8 changed files with 101 additions and 14 deletions
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5
lib/Target/R600/AMDGPUInstructions.td
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@ -191,6 +191,11 @@ def local_load : PatFrag<(ops node:$ptr), (load node:$ptr), [{
return isLocalLoad(dyn_cast<LoadSDNode>(N));
}]>;
def atomic_load_add_local : PatFrag<(ops node:$ptr, node:$value),
(atomic_load_add node:$ptr, node:$value), [{
return dyn_cast<MemSDNode>(N)->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS;
}]>;
def mskor_global : PatFrag<(ops node:$val, node:$ptr),
(AMDGPUstore_mskor node:$val, node:$ptr), [{
return dyn_cast<MemSDNode>(N)->getAddressSpace() == AMDGPUAS::GLOBAL_ADDRESS;

22
lib/Target/R600/R600ISelLowering.cpp
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@ -109,16 +109,24 @@ MachineBasicBlock * R600TargetLowering::EmitInstrWithCustomInserter(
switch (MI->getOpcode()) {
default:
if (TII->get(MI->getOpcode()).TSFlags & R600_InstFlag::LDS_1A) {
MachineInstrBuilder NewMI = BuildMI(*BB, I, BB->findDebugLoc(I),
TII->get(MI->getOpcode()),
AMDGPU::OQAP);
if (TII->isLDSInstr(MI->getOpcode()) &&
TII->getOperandIdx(MI->getOpcode(), AMDGPU::OpName::dst) != -1) {
int DstIdx = TII->getOperandIdx(MI->getOpcode(), AMDGPU::OpName::dst);
assert(DstIdx != -1);
MachineInstrBuilder NewMI;
if (!MRI.use_empty(MI->getOperand(DstIdx).getReg())) {
NewMI = BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(MI->getOpcode()),
AMDGPU::OQAP);
TII->buildDefaultInstruction(*BB, I, AMDGPU::MOV,
MI->getOperand(0).getReg(),
AMDGPU::OQAP);
} else {
NewMI = BuildMI(*BB, I, BB->findDebugLoc(I),
TII->get(AMDGPU::getLDSNoRetOp(MI->getOpcode())));
}
for (unsigned i = 1, e = MI->getNumOperands(); i < e; ++i) {
NewMI.addOperand(MI->getOperand(i));
}
TII->buildDefaultInstruction(*BB, I, AMDGPU::MOV,
MI->getOperand(0).getReg(),
AMDGPU::OQAP);
} else {
return AMDGPUTargetLowering::EmitInstrWithCustomInserter(MI, BB);
}

6
lib/Target/R600/R600InstrInfo.h
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@ -275,6 +275,12 @@ namespace llvm {
void clearFlag(MachineInstr *MI, unsigned Operand, unsigned Flag) const;
};
namespace AMDGPU {
int getLDSNoRetOp(uint16_t Opcode);
} //End namespace AMDGPU
} // End llvm namespace
#endif // R600INSTRINFO_H_

42
lib/Target/R600/R600Instructions.td
View File

@ -1626,23 +1626,39 @@ class R600_LDS_1A <bits<6> lds_op, string name, list<dag> pattern> : R600_LDS <
let DisableEncoding = "$dst";
}
class R600_LDS_1A1D <bits<6> lds_op, string name, list<dag> pattern> :
class R600_LDS_1A1D <bits<6> lds_op, dag outs, string name, list<dag> pattern,
string dst =""> :
R600_LDS <
lds_op,
(outs),
lds_op, outs,
(ins R600_Reg32:$src0, REL:$src0_rel, SEL:$src0_sel,
R600_Reg32:$src1, REL:$src1_rel, SEL:$src1_sel,
LAST:$last, R600_Pred:$pred_sel,
BANK_SWIZZLE:$bank_swizzle),
" "#name#" $last $src0$src0_rel, $src1$src1_rel, $pred_sel",
" "#name#" $last "#dst#"$src0$src0_rel, $src1$src1_rel, $pred_sel",
pattern
> {
field string BaseOp;
let src2 = 0;
let src2_rel = 0;
let LDS_1A1D = 1;
}
class R600_LDS_1A1D_NORET <bits<6> lds_op, string name, list<dag> pattern> :
R600_LDS_1A1D <lds_op, (outs), name, pattern> {
let BaseOp = name;
}
class R600_LDS_1A1D_RET <bits<6> lds_op, string name, list<dag> pattern> :
R600_LDS_1A1D <lds_op, (outs R600_Reg32:$dst), name##"_RET", pattern, "OQAP, "> {
let BaseOp = name;
let usesCustomInserter = 1;
let DisableEncoding = "$dst";
let Defs = [OQAP];
}
class R600_LDS_1A2D <bits<6> lds_op, string name, list<dag> pattern> :
R600_LDS <
lds_op,
@ -1656,15 +1672,19 @@ class R600_LDS_1A2D <bits<6> lds_op, string name, list<dag> pattern> :
let LDS_1A2D = 1;
}
def LDS_WRITE : R600_LDS_1A1D <0xD, "LDS_WRITE",
def LDS_ADD : R600_LDS_1A1D_NORET <0x0, "LDS_ADD", [] >;
def LDS_WRITE : R600_LDS_1A1D_NORET <0xD, "LDS_WRITE",
[(local_store (i32 R600_Reg32:$src1), R600_Reg32:$src0)]
>;
def LDS_BYTE_WRITE : R600_LDS_1A1D<0x12, "LDS_BYTE_WRITE",
def LDS_BYTE_WRITE : R600_LDS_1A1D_NORET<0x12, "LDS_BYTE_WRITE",
[(truncstorei8_local i32:$src1, i32:$src0)]
>;
def LDS_SHORT_WRITE : R600_LDS_1A1D<0x13, "LDS_SHORT_WRITE",
def LDS_SHORT_WRITE : R600_LDS_1A1D_NORET<0x13, "LDS_SHORT_WRITE",
[(truncstorei16_local i32:$src1, i32:$src0)]
>;
def LDS_ADD_RET : R600_LDS_1A1D_RET <0x20, "LDS_ADD",
[(set i32:$dst, (atomic_load_add_local i32:$src0, i32:$src1))]
>;
def LDS_READ_RET : R600_LDS_1A <0x32, "LDS_READ_RET",
[(set (i32 R600_Reg32:$dst), (local_load R600_Reg32:$src0))]
>;
@ -2428,3 +2448,11 @@ def : BitConvert <v4i32, v4f32, R600_Reg128>;
def : DwordAddrPat <i32, R600_Reg32>;
} // End isR600toCayman Predicate
def getLDSNoRetOp : InstrMapping {
let FilterClass = "R600_LDS_1A1D";
let RowFields = ["BaseOp"];
let ColFields = ["DisableEncoding"];
let KeyCol = ["$dst"];
let ValueCols = [[""""]];
}

12
lib/Target/R600/SIInstrInfo.td
View File

@ -362,6 +362,18 @@ class DS_Store_Helper <bits<8> op, string asm, RegisterClass regClass> : DS <
let vdst = 0;
}
class DS_1A1D_RET <bits<8> op, string asm, RegisterClass rc> : DS <
op,
(outs rc:$vdst),
(ins i1imm:$gds, VReg_32:$addr, VReg_32:$data0, i8imm:$offset0,
i8imm:$offset1),
asm#" $gds, $vdst, $addr, $data0, $offset0, $offset1, [M0]",
[]> {
let mayStore = 1;
let mayLoad = 1;
let data1 = 0;
}
class MTBUF_Store_Helper <bits<3> op, string asm, RegisterClass regClass> : MTBUF <
op,
(outs),

4
lib/Target/R600/SIInstructions.td
View File

@ -391,6 +391,7 @@ defm V_CMPX_CLASS_F64 : VOPC_64 <0x000000b8, "V_CMPX_CLASS_F64">;
} // End isCompare = 1
def DS_ADD_U32_RTN : DS_1A1D_RET <0x20, "DS_ADD_U32_RTN", VReg_32>;
def DS_WRITE_B32 : DS_Store_Helper <0x0000000d, "DS_WRITE_B32", VReg_32>;
def DS_WRITE_B8 : DS_Store_Helper <0x00000001e, "DS_WRITE_B8", VReg_32>;
def DS_WRITE_B16 : DS_Store_Helper <0x00000001f, "DS_WRITE_B16", VReg_32>;
@ -1775,6 +1776,9 @@ def : DSWritePat <DS_WRITE_B8, i32, truncstorei8_local>;
def : DSWritePat <DS_WRITE_B16, i32, truncstorei16_local>;
def : DSWritePat <DS_WRITE_B32, i32, local_store>;
def : Pat <(atomic_load_add_local i32:$ptr, i32:$val),
(DS_ADD_U32_RTN 0, $ptr, $val, 0, 0)>;
/********** ================== **********/
/********** SMRD Patterns **********/
/********** ================== **********/

1
lib/Target/R600/SILowerControlFlow.cpp
View File

@ -488,6 +488,7 @@ bool SILowerControlFlowPass::runOnMachineFunction(MachineFunction &MF) {
NeedWQM = true;
// Fall through
case AMDGPU::DS_WRITE_B32:
case AMDGPU::DS_ADD_U32_RTN:
NeedM0 = true;
break;

23
test/CodeGen/R600/atomic_load_add.ll Normal file
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@ -0,0 +1,23 @@
; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s --check-prefix=R600-CHECK
; RUN: llc < %s -march=r600 -mcpu=SI | FileCheck %s --check-prefix=SI-CHECK
; R600-CHECK-LABEL: @atomic_add_local
; R600-CHECK: LDS_ADD *
; SI-CHECK-LABEL: @atomic_add_local
; SI-CHECK: DS_ADD_U32_RTN 0
define void @atomic_add_local(i32 addrspace(3)* %local) {
entry:
%0 = atomicrmw volatile add i32 addrspace(3)* %local, i32 5 seq_cst
ret void
}
; R600-CHECK-LABEL: @atomic_add_ret_local
; R600-CHECK: LDS_ADD_RET *
; SI-CHECK-LABEL: @atomic_add_ret_local
; SI-CHECK: DS_ADD_U32_RTN 0
define void @atomic_add_ret_local(i32 addrspace(1)* %out, i32 addrspace(3)* %local) {
entry:
%0 = atomicrmw volatile add i32 addrspace(3)* %local, i32 5 seq_cst
store i32 %0, i32 addrspace(1)* %out
ret void
}