Fixup a bug where the i8 matmul was using opcode 8 which means unsigned mac (#2827)

erwei-xilinx · web-flow · commit fd4ed98ce678 · 2026-01-23T00:27:30.000Z
diff --git a/lib/Conversion/AIEVecToLLVM/AIEVecToLLVM.cpp b/lib/Conversion/AIEVecToLLVM/AIEVecToLLVM.cpp
@@ -4130,7 +4130,8 @@ class MatMulOpAIE2pConversion
           accIntTy.getWidth() == 32 && lhsLanes == 64 && rhsLanes == 64 &&
           accLanes == 64) {
         // Uses I512.I512.ACC2048 (64 lanes of i8 -> 64 lanes of i32)
-        return {DecodedMatMulOp::Kind::I8_8x8x8_I512_ACC2048, lhs, rhs, acc, 8};
+        return {DecodedMatMulOp::Kind::I8_8x8x8_I512_ACC2048, lhs, rhs, acc,
+                776};
       }
 
       // Check for <8x2xi16> x <2x8xi16> + <8x8xi32>

Original file line number	Diff line number	Diff line change
`@@ -4130,7 +4130,8 @@ class MatMulOpAIE2pConversion`
`4130`	`4130`	`accIntTy.getWidth() == 32 && lhsLanes == 64 && rhsLanes == 64 &&`
`4131`	`4131`	`accLanes == 64) {`
`4132`	`4132`	`// Uses I512.I512.ACC2048 (64 lanes of i8 -> 64 lanes of i32)`
`4133`		`- return {DecodedMatMulOp::Kind::I8_8x8x8_I512_ACC2048, lhs, rhs, acc, 8};`
	`4133`	`+ return {DecodedMatMulOp::Kind::I8_8x8x8_I512_ACC2048, lhs, rhs, acc,`
	`4134`	`+ 776};`
`4134`	`4135`	`}`
`4135`	`4136`
`4136`	`4137`	`// Check for <8x2xi16> x <2x8xi16> + <8x8xi32>`