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| author | Clifford Wolf <clifford@clifford.at> | 2018-02-15 15:26:37 +0100 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2018-02-15 15:26:37 +0100 |
| commit | bc8ab3ab44f58fc126b103f4a28dd9f6ec3fd90b (patch) | |
| tree | 1ae68d858aecf79404bc712af74d53afc6c05044 | |
| parent | c1abd3b02cab235334342f3520e2535eb74c5792 (diff) | |
| download | yosys-bc8ab3ab44f58fc126b103f4a28dd9f6ec3fd90b.tar.gz yosys-bc8ab3ab44f58fc126b103f4a28dd9f6ec3fd90b.tar.bz2 yosys-bc8ab3ab44f58fc126b103f4a28dd9f6ec3fd90b.zip | |
Fix verific PRIM_SVA_AT handling in properties with PRIM_SVA_DISABLE_IFF
| -rw-r--r-- | frontends/verific/verific.cc | 2 | ||||
| -rw-r--r-- | tests/sva/sva_not.sv | 34 |
2 files changed, 35 insertions, 1 deletions
diff --git a/frontends/verific/verific.cc b/frontends/verific/verific.cc index 09c379f19..fa0db1f56 100644 --- a/frontends/verific/verific.cc +++ b/frontends/verific/verific.cc @@ -1350,7 +1350,7 @@ struct VerificSvaPP return default_net; } - if (inst->Type() == PRIM_SVA_AT) { + if (inst->Type() == PRIM_SVA_AT || inst->Type() == PRIM_SVA_DISABLE_IFF) { Net *new_net = rewrite(get_ast_input2(inst)); if (new_net) { inst->Disconnect(inst->View()->GetInput2()); diff --git a/tests/sva/sva_not.sv b/tests/sva/sva_not.sv new file mode 100644 index 000000000..d81a48653 --- /dev/null +++ b/tests/sva/sva_not.sv @@ -0,0 +1,34 @@ +module top ( + input clk, + input reset, + input ping, + input [1:0] cfg, + output reg pong +); + reg [2:0] cnt; + localparam integer maxdelay = 8; + + always @(posedge clk) begin + if (reset) begin + cnt <= 0; + pong <= 0; + end else begin + cnt <= cnt - |cnt; + pong <= cnt == 1; + if (ping) cnt <= 4 + cfg; + end + end + + assert property ( + @(posedge clk) + disable iff (reset) + not (ping ##1 !pong [*maxdelay]) + ); + +`ifndef FAIL + assume property ( + @(posedge clk) + not (cnt && ping) + ); +`endif +endmodule |