[Mlir-commits] [mlir] [MLIR][NVGPU] Introduce `nvgpu.wargroup.mma.store` Op for Hopper GPUs (PR #65441)

[Guray Ozen]

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@@ -1299,6 +1301,82 @@ struct NVGPUWarpgroupMmaOpLowering
   }
 };
 
+struct NVGPUWarpgroupMmaStoreOpLowering
+    : public ConvertOpToLLVMPattern<nvgpu::WarpgroupMmaStoreOp> {
+  using ConvertOpToLLVMPattern<
+      nvgpu::WarpgroupMmaStoreOp>::ConvertOpToLLVMPattern;
+
+  void storeFragmentedMatrix(Value wgmmaResult, nvgpu::WarpgroupMmaStoreOp op,
+                             OpAdaptor adaptor,
+                             ConversionPatternRewriter &rewriter,
+                             int offset) const {
+    Location loc = op->getLoc();
+    Type i32 = rewriter.getI32Type();
+
+    auto makeConst = [&](int32_t index) -> Value {
+      return rewriter.create<LLVM::ConstantOp>(
+          loc, i32, rewriter.getI32IntegerAttr(index));
+    };
+    Value c4 = makeConst(4);
+    Value c32 = makeConst(kWarpSize);
+    Value c8 = makeConst(8);
+    Value c2 = makeConst(2);
+    Value c1 = makeConst(1);
+    Value c16 = makeConst(16);
+
+    auto makeMul = [&](Value lhs, Value rhs) -> Value {
+      return rewriter.create<LLVM::MulOp>(loc, lhs.getType(), lhs, rhs);
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grypp wrote:

wow, awesome. I've never heard of that :) 

https://github.com/llvm/llvm-project/pull/65441