Matthew Poremba has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/64513?usp=email )
Change subject: arch-vega: Implementing global_atomic_smax
..
arch-vega: Implementing global_atomic_smax
Change-Id: Id4053424c98eec1e98eb555bb35b48f0b5d2407b
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64513
Reviewed-by: Matt Sinclair
Maintainer: Matt Sinclair
Tested-by: kokoro
---
M src/arch/amdgpu/vega/insts/instructions.cc
M src/arch/amdgpu/vega/insts/instructions.hh
2 files changed, 67 insertions(+), 1 deletion(-)
Approvals:
kokoro: Regressions pass
Matt Sinclair: Looks good to me, approved; Looks good to me, approved
diff --git a/src/arch/amdgpu/vega/insts/instructions.cc
b/src/arch/amdgpu/vega/insts/instructions.cc
index e3639a5..b6a78b2 100644
--- a/src/arch/amdgpu/vega/insts/instructions.cc
+++ b/src/arch/amdgpu/vega/insts/instructions.cc
@@ -45079,8 +45079,59 @@
void
Inst_FLAT__FLAT_ATOMIC_SMAX::execute(GPUDynInstPtr gpuDynInst)
{
-panicUnimplemented();
+Wavefront *wf = gpuDynInst->wavefront();
+
+if (gpuDynInst->exec_mask.none()) {
+wf->decVMemInstsIssued();
+wf->decLGKMInstsIssued();
+return;
+}
+
+gpuDynInst->execUnitId = wf->execUnitId;
+gpuDynInst->latency.init(gpuDynInst->computeUnit());
+gpuDynInst->latency.set(gpuDynInst->computeUnit()->clockPeriod());
+
+ConstVecOperandU64 addr(gpuDynInst, extData.ADDR);
+ConstVecOperandU32 data(gpuDynInst, extData.DATA);
+
+addr.read();
+data.read();
+
+calcAddr(gpuDynInst, addr, extData.SADDR, instData.OFFSET);
+
+for (int lane = 0; lane < NumVecElemPerVecReg; ++lane) {
+if (gpuDynInst->exec_mask[lane]) {
+(reinterpret_cast(gpuDynInst->a_data))[lane]
+= data[lane];
+}
+}
+
+gpuDynInst->computeUnit()->globalMemoryPipe.
+issueRequest(gpuDynInst);
} // execute
+
+void
+Inst_FLAT__FLAT_ATOMIC_SMAX::initiateAcc(GPUDynInstPtr gpuDynInst)
+{
+initAtomicAccess(gpuDynInst);
+} // initiateAcc
+
+void
+Inst_FLAT__FLAT_ATOMIC_SMAX::completeAcc(GPUDynInstPtr gpuDynInst)
+{
+if (isAtomicRet()) {
+VecOperandU32 vdst(gpuDynInst, extData.VDST);
+
+for (int lane = 0; lane < NumVecElemPerVecReg; ++lane) {
+if (gpuDynInst->exec_mask[lane]) {
+vdst[lane] = (reinterpret_cast(
+gpuDynInst->d_data))[lane];
+}
+}
+
+vdst.write();
+}
+} // completeAcc
// --- Inst_FLAT__FLAT_ATOMIC_UMAX class methods ---
Inst_FLAT__FLAT_ATOMIC_UMAX::Inst_FLAT__FLAT_ATOMIC_UMAX(InFmt_FLAT
*iFmt)
diff --git a/src/arch/amdgpu/vega/insts/instructions.hh
b/src/arch/amdgpu/vega/insts/instructions.hh
index 8b0c8c4..d45a84c 100644
--- a/src/arch/amdgpu/vega/insts/instructions.hh
+++ b/src/arch/amdgpu/vega/insts/instructions.hh
@@ -42691,6 +42691,8 @@
} // getOperandSize
void execute(GPUDynInstPtr) override;
+void initiateAcc(GPUDynInstPtr) override;
+void completeAcc(GPUDynInstPtr) override;
}; // Inst_FLAT__FLAT_ATOMIC_SMAX
class Inst_FLAT__FLAT_ATOMIC_UMAX : public Inst_FLAT
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Id4053424c98eec1e98eb555bb35b48f0b5d2407b
Gerrit-Change-Number: 64513
Gerrit-PatchSet: 2
Gerrit-Owner: Alexandru Duțu (Alex)
Gerrit-Reviewer: Matt Sinclair
Gerrit-Reviewer: Matthew Poremba
Gerrit-Reviewer: kokoro
Gerrit-MessageType: merged
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