[TableGen] Split the target description generator

1 files changed, 32 insertions, 0 deletions

diff --git a/backend/utils/TableGen/SearchableTableEmitter.cpp b/backend/utils/TableGen/SearchableTableEmitter.cpp
new file mode 100644
index 0000000..3dfa534
--- /dev/null
+++ b/backend/utils/TableGen/SearchableTableEmitter.cpp
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "TableGenBackends.h"
+
+#include <algorithm>
+#include <ranges>
+#include <sstream>
+#include <string>
+
+namespace rcc::targetgen {
+
+std::string emitSearchableTables(const NormalizedTargetModel &Model) {
+  std::ostringstream Output;
+  const auto AssemblyInstructionCount =
+      std::ranges::count_if(Model.Instructions, [](const NormalizedInstruction &Instruction) {
+        return !Instruction.AssemblyMnemonic.empty();
+      });
+  Output << "constexpr std::array<AssemblyInstructionInfo, " << AssemblyInstructionCount
+         << "> GeneratedAssemblyInstructions = {{\n";
+  for (const NormalizedInstruction &Instruction : Model.Instructions) {
+    if (Instruction.AssemblyMnemonic.empty())
+      continue;
+    Output << "    {Opcode::fromValue(" << Instruction.ID << "), ";
+    appendQuoted(Output, Instruction.AssemblyMnemonic);
+    Output << ", AssemblyFormatID::fromValue(" << Instruction.AssemblyFormat << "), "
+           << Instruction.BinaryEncoding << "},\n";
+  }
+  Output << "}};\n\n";
+  return Output.str();
+}
+
+} // namespace rcc::targetgen