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Support user-provided DPI-C function declarations (#7626) (#7893)

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Fixes #7626.
This commit is contained in:
Jakub Michalski
2026-07-08 05:22:24 -07:00
committed by GitHub
parent 93d0443998
commit 646dcd3838
14 changed files with 157 additions and 2 deletions
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src/V3PreProc.cpp
+13
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@@ -545,6 +545,19 @@ void V3PreProcImp::comment(const string& text) {
if (arg.size() && baseCmd == "public_flat_rw_on")
baseCmd += "_sns"; // different cmd for applying sensitivity
if (!printed) insertUnreadback("/*verilator " + baseCmd + "*/ " + arg + " /**/");
} else if (VString::startsWith(cmd, "dpi_c_decl")) {
// "/*verilator dpi_c_decl foo(bar) */" -> "/*verilator dpi_c_decl*/ \"foo(bar)\""
string baseCmd = cmd.substr(0, std::strlen("dpi_c_decl"));
string::size_type startOfArg = baseCmd.size();
while (std::isspace(cmd[startOfArg])) startOfArg++;
string arg = cmd.substr(startOfArg);
if (arg.empty()) {
fileline()->v3warn(
BADVLTPRAGMA,
"No function declaration provided in /*verilator dpi_c_decl*/ meta-comment");
return;
}
if (!printed) insertUnreadback("/*verilator " + baseCmd + "*/ \"" + arg + "\" /**/");
} else {
if (!printed) insertUnreadback("/*verilator " + cmd + "*/");
}