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arch-vega: Implement ds_read_i8

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Read one byte with sign extended from LDS.

Change-Id: I9cb9b4033c6f834241cba944bc7e6a7ebc5401be
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67076
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
This commit is contained in:
Matthew Poremba
2022-12-26 13:27:06 -08:00
parent b83457df0b
commit 3bfa220e4e
2 changed files with 45 additions and 1 deletions
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44
src/arch/amdgpu/vega/insts/instructions.cc
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@@ -35636,8 +35636,50 @@ namespace VegaISA
void
Inst_DS__DS_READ_I8::execute(GPUDynInstPtr gpuDynInst)
{
panicUnimplemented();
Wavefront *wf = gpuDynInst->wavefront();
if (gpuDynInst->exec_mask.none()) {
wf->decLGKMInstsIssued();
return;
}
gpuDynInst->execUnitId = wf->execUnitId;
gpuDynInst->latency.init(gpuDynInst->computeUnit());
gpuDynInst->latency.set(
gpuDynInst->computeUnit()->cyclesToTicks(Cycles(24)));
ConstVecOperandU32 addr(gpuDynInst, extData.ADDR);
addr.read();
calcAddr(gpuDynInst, addr);
gpuDynInst->computeUnit()->localMemoryPipe.issueRequest(gpuDynInst);
} // execute
void
Inst_DS__DS_READ_I8::initiateAcc(GPUDynInstPtr gpuDynInst)
{
Addr offset0 = instData.OFFSET0;
Addr offset1 = instData.OFFSET1;
Addr offset = (offset1 << 8) | offset0;
initMemRead<VecElemI8>(gpuDynInst, offset);
} // initiateAcc
void
Inst_DS__DS_READ_I8::completeAcc(GPUDynInstPtr gpuDynInst)
{
VecOperandU32 vdst(gpuDynInst, extData.VDST);
for (int lane = 0; lane < NumVecElemPerVecReg; ++lane) {
if (gpuDynInst->exec_mask[lane]) {
vdst[lane] = (VecElemU32)sext<8>((reinterpret_cast<VecElemI8*>(
gpuDynInst->d_data))[lane]);
}
}
vdst.write();
} // completeAcc
// --- Inst_DS__DS_READ_U8 class methods ---
Inst_DS__DS_READ_U8::Inst_DS__DS_READ_U8(InFmt_DS *iFmt)

2
src/arch/amdgpu/vega/insts/instructions.hh
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@@ -32848,6 +32848,8 @@ namespace VegaISA
} // getOperandSize
void execute(GPUDynInstPtr) override;
void initiateAcc(GPUDynInstPtr) override;
void completeAcc(GPUDynInstPtr) override;
}; // Inst_DS__DS_READ_I8
class Inst_DS__DS_READ_U8 : public Inst_DS