mirror of
https://github.com/verilator/verilator.git
synced 2026-10-05 17:43:31 +02:00
Fix protect-lib without sequential logic (#2492)
* add a test for protect-lib without sequential logic that cause the follwoing error.
%Error: obj_vlt/t_prot_lib_comb/secret/secret.sv:78:14: syntax error, unexpected ')'
78 | always @() begin
| ^
* protect-lib wrapper must contain sequential signal related statements
only if the protected design is a sequential logic.
Diff looks big, but actually just add "if (m_hasClk)" condition.
Signed-off-by: Yutetsu TAKATSUKASA <[email protected]>
This commit is contained in:
Yutetsu TAKATSUKASA
+100
-61
@@ -60,6 +60,7 @@ private:
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string m_libName;
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string m_topName;
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bool m_foundTop; // Have seen the top module
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bool m_hasClk; // True if the top module has sequential logic
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// VISITORS
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virtual void visit(AstNetlist* nodep) VL_OVERRIDE {
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@@ -79,6 +80,8 @@ private:
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UASSERT_OBJ(!m_foundTop, nodep, "Multiple root modules");
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}
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FileLine* fl = nodep->fileline();
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// Need to know the existence of clk before createSvFile()
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m_hasClk = checkIfClockExists(nodep);
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createSvFile(fl);
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createCppFile(fl);
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@@ -162,14 +165,16 @@ private:
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txtp->addNodep(m_comboPortsp);
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txtp->addText(fl, ");\n\n");
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seqComment(txtp, fl);
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m_seqPortsp = new AstTextBlock(fl,
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"import \"DPI-C\" function longint " + m_libName
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+ "_protectlib_seq_update"
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"(\n",
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false, true);
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m_seqPortsp->addText(fl, "chandle handle__V\n");
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txtp->addNodep(m_seqPortsp);
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txtp->addText(fl, ");\n\n");
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if (m_hasClk) {
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m_seqPortsp = new AstTextBlock(fl,
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"import \"DPI-C\" function longint " + m_libName
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+ "_protectlib_seq_update"
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"(\n",
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false, true);
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m_seqPortsp->addText(fl, "chandle handle__V\n");
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txtp->addNodep(m_seqPortsp);
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txtp->addText(fl, ");\n\n");
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}
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comboIgnoreComment(txtp, fl);
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m_comboIgnorePortsp = new AstTextBlock(fl,
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"import \"DPI-C\" function void " + m_libName
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@@ -192,7 +197,7 @@ private:
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m_tmpDeclsp = new AstTextBlock(fl);
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txtp->addNodep(m_tmpDeclsp);
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txtp->addText(fl, "\ntime last_combo_seqnum__V;\n");
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txtp->addText(fl, "time last_seq_seqnum__V;\n\n");
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if (m_hasClk) { txtp->addText(fl, "time last_seq_seqnum__V;\n\n"); }
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// CPP hash value
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addComment(txtp, fl, "Hash value to make sure this file and the corresponding");
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@@ -222,33 +227,41 @@ private:
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txtp->addText(fl, "end\n\n");
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// Sequential process
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addComment(txtp, fl, "Evaluate clock edges");
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m_clkSensp = new AstTextBlock(fl, "always @(", false, true);
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txtp->addNodep(m_clkSensp);
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txtp->addText(fl, ") begin\n");
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m_comboIgnoreParamsp
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= new AstTextBlock(fl, m_libName + "_protectlib_combo_ignore(\n", false, true);
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m_comboIgnoreParamsp->addText(fl, "handle__V\n");
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txtp->addNodep(m_comboIgnoreParamsp);
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txtp->addText(fl, ");\n");
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m_seqParamsp = new AstTextBlock(
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fl, "last_seq_seqnum__V <= " + m_libName + "_protectlib_seq_update(\n", false, true);
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m_seqParamsp->addText(fl, "handle__V\n");
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txtp->addNodep(m_seqParamsp);
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txtp->addText(fl, ");\n");
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m_nbAssignsp = new AstTextBlock(fl);
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txtp->addNodep(m_nbAssignsp);
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txtp->addText(fl, "end\n\n");
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if (m_hasClk) {
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addComment(txtp, fl, "Evaluate clock edges");
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m_clkSensp = new AstTextBlock(fl, "always @(", false, true);
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txtp->addNodep(m_clkSensp);
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txtp->addText(fl, ") begin\n");
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m_comboIgnoreParamsp
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= new AstTextBlock(fl, m_libName + "_protectlib_combo_ignore(\n", false, true);
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m_comboIgnoreParamsp->addText(fl, "handle__V\n");
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txtp->addNodep(m_comboIgnoreParamsp);
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txtp->addText(fl, ");\n");
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m_seqParamsp = new AstTextBlock(
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fl, "last_seq_seqnum__V <= " + m_libName + "_protectlib_seq_update(\n", false,
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true);
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m_seqParamsp->addText(fl, "handle__V\n");
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txtp->addNodep(m_seqParamsp);
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txtp->addText(fl, ");\n");
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m_nbAssignsp = new AstTextBlock(fl);
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txtp->addNodep(m_nbAssignsp);
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txtp->addText(fl, "end\n\n");
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}
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// Select between combinatorial and sequential results
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addComment(txtp, fl, "Select between combinatorial and sequential results");
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txtp->addText(fl, "always @(*) begin\n");
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m_seqAssignsp = new AstTextBlock(fl, "if (last_seq_seqnum__V > "
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"last_combo_seqnum__V) begin\n");
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txtp->addNodep(m_seqAssignsp);
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m_comboAssignsp = new AstTextBlock(fl, "end else begin\n");
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txtp->addNodep(m_comboAssignsp);
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txtp->addText(fl, "end\n");
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if (m_hasClk) {
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m_seqAssignsp = new AstTextBlock(fl, "if (last_seq_seqnum__V > "
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"last_combo_seqnum__V) begin\n");
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txtp->addNodep(m_seqAssignsp);
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m_comboAssignsp = new AstTextBlock(fl, "end else begin\n");
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txtp->addNodep(m_comboAssignsp);
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txtp->addText(fl, "end\n");
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} else {
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m_comboAssignsp = new AstTextBlock(fl, "");
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txtp->addNodep(m_comboAssignsp);
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}
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txtp->addText(fl, "end\n\n");
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// Final
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@@ -327,19 +340,21 @@ private:
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txtp->addText(fl, "return handlep__V->m_seqnum++;\n");
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txtp->addText(fl, "}\n\n");
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seqComment(txtp, fl);
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m_cSeqParamsp = new AstTextBlock(
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fl, "long long " + m_libName + "_protectlib_seq_update(\n", false, true);
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m_cSeqParamsp->addText(fl, "void* vhandlep__V\n");
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txtp->addNodep(m_cSeqParamsp);
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txtp->addText(fl, ")\n");
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m_cSeqClksp = new AstTextBlock(fl, "{\n");
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castPtr(fl, m_cSeqClksp);
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txtp->addNodep(m_cSeqClksp);
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m_cSeqOutsp = new AstTextBlock(fl, "handlep__V->eval();\n");
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txtp->addNodep(m_cSeqOutsp);
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txtp->addText(fl, "return handlep__V->m_seqnum++;\n");
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txtp->addText(fl, "}\n\n");
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if (m_hasClk) {
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seqComment(txtp, fl);
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m_cSeqParamsp = new AstTextBlock(
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fl, "long long " + m_libName + "_protectlib_seq_update(\n", false, true);
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m_cSeqParamsp->addText(fl, "void* vhandlep__V\n");
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txtp->addNodep(m_cSeqParamsp);
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txtp->addText(fl, ")\n");
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m_cSeqClksp = new AstTextBlock(fl, "{\n");
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castPtr(fl, m_cSeqClksp);
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txtp->addNodep(m_cSeqClksp);
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m_cSeqOutsp = new AstTextBlock(fl, "handlep__V->eval();\n");
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txtp->addNodep(m_cSeqOutsp);
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txtp->addText(fl, "return handlep__V->m_seqnum++;\n");
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txtp->addText(fl, "}\n\n");
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}
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comboIgnoreComment(txtp, fl);
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m_cIgnoreParamsp = new AstTextBlock(
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@@ -369,6 +384,7 @@ private:
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}
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if (nodep->direction() == VDirection::INPUT) {
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if (nodep->isUsedClock() || nodep->attrClocker() == VVarAttrClocker::CLOCKER_YES) {
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UASSERT_OBJ(m_hasClk, nodep, "checkIfClockExists() didn't find this clock");
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handleClock(nodep);
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} else {
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handleDataInput(nodep);
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@@ -396,8 +412,10 @@ private:
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FileLine* fl = varp->fileline();
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handleInput(varp);
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m_seqPortsp->addNodep(varp->cloneTree(false));
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m_seqParamsp->addText(fl, varp->name() + "\n");
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m_clkSensp->addText(fl, "edge(" + varp->name() + ")");
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if (m_hasClk) {
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m_seqParamsp->addText(fl, varp->name() + "\n");
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m_clkSensp->addText(fl, "edge(" + varp->name() + ")");
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}
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m_cSeqParamsp->addText(fl, varp->dpiArgType(true, false) + "\n");
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m_cSeqClksp->addText(fl, cInputConnection(varp));
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}
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@@ -408,7 +426,7 @@ private:
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m_comboPortsp->addNodep(varp->cloneTree(false));
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m_comboParamsp->addText(fl, varp->name() + "\n");
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m_comboIgnorePortsp->addNodep(varp->cloneTree(false));
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m_comboIgnoreParamsp->addText(fl, varp->name() + "\n");
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if (m_hasClk) { m_comboIgnoreParamsp->addText(fl, varp->name() + "\n"); }
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m_cComboParamsp->addText(fl, varp->dpiArgType(true, false) + "\n");
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m_cComboInsp->addText(fl, cInputConnection(varp));
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m_cIgnoreParamsp->addText(fl, varp->dpiArgType(true, false) + "\n");
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@@ -421,29 +439,49 @@ private:
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m_modPortsp->addNodep(varp->cloneTree(false));
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m_comboPortsp->addNodep(varp->cloneTree(false));
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m_comboParamsp->addText(fl, varp->name() + "_combo__V\n");
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m_seqPortsp->addNodep(varp->cloneTree(false));
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m_seqParamsp->addText(fl, varp->name() + "_tmp__V\n");
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if (m_hasClk) {
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m_seqPortsp->addNodep(varp->cloneTree(false));
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m_seqParamsp->addText(fl, varp->name() + "_tmp__V\n");
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}
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AstNodeDType* comboDtypep = varp->dtypep()->cloneTree(false);
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m_comboDeclsp->addNodep(comboDtypep);
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m_comboDeclsp->addText(fl, " " + varp->name() + "_combo__V;\n");
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AstNodeDType* seqDtypep = varp->dtypep()->cloneTree(false);
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m_seqDeclsp->addNodep(seqDtypep);
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m_seqDeclsp->addText(fl, " " + varp->name() + "_seq__V;\n");
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if (m_hasClk) {
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AstNodeDType* seqDtypep = varp->dtypep()->cloneTree(false);
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m_seqDeclsp->addNodep(seqDtypep);
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m_seqDeclsp->addText(fl, " " + varp->name() + "_seq__V;\n");
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AstNodeDType* tmpDtypep = varp->dtypep()->cloneTree(false);
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m_tmpDeclsp->addNodep(tmpDtypep);
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m_tmpDeclsp->addText(fl, " " + varp->name() + "_tmp__V;\n");
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AstNodeDType* tmpDtypep = varp->dtypep()->cloneTree(false);
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m_tmpDeclsp->addNodep(tmpDtypep);
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m_tmpDeclsp->addText(fl, " " + varp->name() + "_tmp__V;\n");
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m_nbAssignsp->addText(fl, varp->name() + "_seq__V <= " + varp->name() + "_tmp__V;\n");
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m_seqAssignsp->addText(fl, varp->name() + " = " + varp->name() + "_seq__V;\n");
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m_nbAssignsp->addText(fl, varp->name() + "_seq__V <= " + varp->name() + "_tmp__V;\n");
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m_seqAssignsp->addText(fl, varp->name() + " = " + varp->name() + "_seq__V;\n");
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}
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m_comboAssignsp->addText(fl, varp->name() + " = " + varp->name() + "_combo__V;\n");
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m_cComboParamsp->addText(fl, varp->dpiArgType(true, false) + "\n");
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m_cComboOutsp->addText(fl,
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V3Task::assignInternalToDpi(varp, true, "", "", "handlep__V->"));
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m_cSeqParamsp->addText(fl, varp->dpiArgType(true, false) + "\n");
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m_cSeqOutsp->addText(fl, V3Task::assignInternalToDpi(varp, true, "", "", "handlep__V->"));
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if (m_hasClk) {
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m_cSeqParamsp->addText(fl, varp->dpiArgType(true, false) + "\n");
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m_cSeqOutsp->addText(fl,
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V3Task::assignInternalToDpi(varp, true, "", "", "handlep__V->"));
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}
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}
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static bool checkIfClockExists(AstNodeModule* modp) {
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for (AstNode* stmtp = modp->stmtsp(); stmtp; stmtp = stmtp->nextp()) {
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if (AstVar* varp = VN_CAST(stmtp, Var)) {
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if (varp->direction() == VDirection::INPUT
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&& (varp->isUsedClock()
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|| varp->attrClocker() == VVarAttrClocker::CLOCKER_YES)) {
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return true;
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}
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}
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}
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return false;
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}
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public:
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@@ -475,7 +513,8 @@ public:
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, m_cIgnoreParamsp(NULL)
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, m_libName(v3Global.opt.protectLib())
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, m_topName(v3Global.opt.prefix())
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, m_foundTop(false) {
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, m_foundTop(false)
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, m_hasClk(false) {
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iterate(nodep);
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}
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};
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