diff options
Diffstat (limited to 'src/arch/hsail')
| -rw-r--r-- | src/arch/hsail/insts/mem.hh | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/arch/hsail/insts/mem.hh b/src/arch/hsail/insts/mem.hh index e223c7cf5..2e7dfcd1c 100644 --- a/src/arch/hsail/insts/mem.hh +++ b/src/arch/hsail/insts/mem.hh @@ -36,9 +36,12 @@ #ifndef __ARCH_HSAIL_INSTS_MEM_HH__ #define __ARCH_HSAIL_INSTS_MEM_HH__ +#include <type_traits> + #include "arch/hsail/insts/decl.hh" #include "arch/hsail/insts/gpu_static_inst.hh" #include "arch/hsail/operand.hh" +#include "gpu-compute/compute_unit.hh" namespace HsailISA { @@ -491,6 +494,86 @@ namespace HsailISA gpuDynInst->updateStats(); } + void + completeAcc(GPUDynInstPtr gpuDynInst) override + { + typedef typename MemDataType::CType c1; + + constexpr bool is_vt_32 = DestDataType::vgprType == VT_32; + + /** + * this code essentially replaces the long if-else chain + * that was in used GlobalMemPipeline::exec() to infer the + * size (single/double) and type (floating point/integer) of + * the destination register. this is needed for load + * instructions because the loaded value and the + * destination type can be of different sizes, and we also + * need to know if the value we're writing back is floating + * point and signed/unsigned, so we can properly cast the + * writeback value + */ + typedef typename std::conditional<is_vt_32, + typename std::conditional<std::is_floating_point<c1>::value, + float, typename std::conditional<std::is_signed<c1>::value, + int32_t, uint32_t>::type>::type, + typename std::conditional<std::is_floating_point<c1>::value, + double, typename std::conditional<std::is_signed<c1>::value, + int64_t, uint64_t>::type>::type>::type c0; + + + Wavefront *w = gpuDynInst->wavefront(); + + std::vector<uint32_t> regVec; + // iterate over number of destination register operands since + // this is a load + for (int k = 0; k < num_dest_operands; ++k) { + assert((sizeof(c1) * num_dest_operands) + <= MAX_WIDTH_FOR_MEM_INST); + + int dst = this->dest.regIndex() + k; + if (num_dest_operands > MAX_REGS_FOR_NON_VEC_MEM_INST) + dst = dest_vect[k].regIndex(); + // virtual->physical VGPR mapping + int physVgpr = w->remap(dst, sizeof(c0), 1); + // save the physical VGPR index + regVec.push_back(physVgpr); + + c1 *p1 = + &((c1*)gpuDynInst->d_data)[k * w->computeUnit->wfSize()]; + + for (int i = 0; i < w->computeUnit->wfSize(); ++i) { + if (gpuDynInst->exec_mask[i]) { + DPRINTF(GPUReg, "CU%d, WF[%d][%d], lane %d: " + "$%s%d <- %d global ld done (src = wavefront " + "ld inst)\n", w->computeUnit->cu_id, w->simdId, + w->wfSlotId, i, sizeof(c0) == 4 ? "s" : "d", + dst, *p1); + // write the value into the physical VGPR. This is a + // purely functional operation. No timing is modeled. + w->computeUnit->vrf[w->simdId]->write<c0>(physVgpr, + *p1, i); + } + ++p1; + } + } + + // Schedule the write operation of the load data on the VRF. + // This simply models the timing aspect of the VRF write operation. + // It does not modify the physical VGPR. + int loadVrfBankConflictCycles = gpuDynInst->computeUnit()-> + vrf[w->simdId]->exec(gpuDynInst->seqNum(), w, regVec, + sizeof(c0), gpuDynInst->time); + + if (this->isGlobalMem()) { + gpuDynInst->computeUnit()->globalMemoryPipe + .incLoadVRFBankConflictCycles(loadVrfBankConflictCycles); + } else { + assert(this->isLocalMem()); + gpuDynInst->computeUnit()->localMemoryPipe + .incLoadVRFBankConflictCycles(loadVrfBankConflictCycles); + } + } + private: void execLdAcq(GPUDynInstPtr gpuDynInst) override @@ -941,6 +1024,11 @@ namespace HsailISA execSt(gpuDynInst); } + // stores don't write anything back, so there is nothing + // to do here. we only override this method to avoid the + // fatal in the base class implementation + void completeAcc(GPUDynInstPtr gpuDynInst) override { } + private: // execSt may be called through a continuation // if the store had release semantics. see comment for @@ -1409,6 +1497,58 @@ namespace HsailISA } + void + completeAcc(GPUDynInstPtr gpuDynInst) override + { + // if this is not an atomic return op, then we + // have nothing more to do. + if (this->isAtomicRet()) { + // the size of the src operands and the + // memory being operated on must match + // for HSAIL atomics - this assumption may + // not apply to all ISAs + typedef typename MemDataType::CType CType; + + Wavefront *w = gpuDynInst->wavefront(); + int dst = this->dest.regIndex(); + std::vector<uint32_t> regVec; + // virtual->physical VGPR mapping + int physVgpr = w->remap(dst, sizeof(CType), 1); + regVec.push_back(physVgpr); + CType *p1 = &((CType*)gpuDynInst->d_data)[0]; + + for (int i = 0; i < w->computeUnit->wfSize(); ++i) { + if (gpuDynInst->exec_mask[i]) { + DPRINTF(GPUReg, "CU%d, WF[%d][%d], lane %d: " + "$%s%d <- %d global ld done (src = wavefront " + "ld inst)\n", w->computeUnit->cu_id, w->simdId, + w->wfSlotId, i, sizeof(CType) == 4 ? "s" : "d", + dst, *p1); + // write the value into the physical VGPR. This is a + // purely functional operation. No timing is modeled. + w->computeUnit->vrf[w->simdId]->write<CType>(physVgpr, *p1, i); + } + ++p1; + } + + // Schedule the write operation of the load data on the VRF. + // This simply models the timing aspect of the VRF write operation. + // It does not modify the physical VGPR. + int loadVrfBankConflictCycles = gpuDynInst->computeUnit()-> + vrf[w->simdId]->exec(gpuDynInst->seqNum(), w, regVec, + sizeof(CType), gpuDynInst->time); + + if (this->isGlobalMem()) { + gpuDynInst->computeUnit()->globalMemoryPipe + .incLoadVRFBankConflictCycles(loadVrfBankConflictCycles); + } else { + assert(this->isLocalMem()); + gpuDynInst->computeUnit()->localMemoryPipe + .incLoadVRFBankConflictCycles(loadVrfBankConflictCycles); + } + } + } + void execute(GPUDynInstPtr gpuDynInst) override; private: |