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-rw-r--r--techlibs/xilinx/cells_sim.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/techlibs/xilinx/cells_sim.v b/techlibs/xilinx/cells_sim.v
index 99120452c..ea5a3b788 100644
--- a/techlibs/xilinx/cells_sim.v
+++ b/techlibs/xilinx/cells_sim.v
@@ -506,6 +506,6 @@ module DSP48E1 (
if (PCIN != 48'b0) $fatal(1, "Unsupported PCIN value");
if (CARRYIN != 1'b0) $fatal(1, "Unsupported CARRYIN value");
`endif
- P[42:0] <= A[24:0] * B;
+ P[42:0] <= $signed(A[24:0]) * $signed(B);
end
endmodule