From 379ff50dcc7ccf977379aee68fa9d10f69065d23 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sun, 9 Aug 2026 18:31:49 +0800
Subject: [MC] Implement RV64GC assembly emission

---
 backend/include/rcc/CodeGen/TargetMCInstLowering.h | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 backend/include/rcc/CodeGen/TargetMCInstLowering.h

(limited to 'backend/include/rcc/CodeGen/TargetMCInstLowering.h')

diff --git a/backend/include/rcc/CodeGen/TargetMCInstLowering.h b/backend/include/rcc/CodeGen/TargetMCInstLowering.h
new file mode 100644
index 0000000..875d2dd
--- /dev/null
+++ b/backend/include/rcc/CodeGen/TargetMCInstLowering.h
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_TARGETMCINSTLOWERING_H
+#define RCC_CODEGEN_TARGETMCINSTLOWERING_H
+
+#include "rcc/MC/MCInst.h"
+#include "rcc/MC/MCInstPrinter.h"
+#include "rcc/MC/MCSection.h"
+#include "rcc/MC/MCStreamer.h"
+#include "rcc/Support/Error.h"
+
+namespace rcc {
+
+class MachineConstantPoolEntry;
+class GlobalInitializer;
+struct GlobalObjectDesc;
+class MachineFunction;
+class MachineInstr;
+class MachineJumpTableEntry;
+class MachineMCContext;
+struct GenericConstantData;
+class TargetConstant;
+
+class TargetMCInstLowering {
+public:
+  virtual ~TargetMCInstLowering() = default;
+
+  [[nodiscard]] virtual const mc::MCInstPrinter &instructionPrinter() const noexcept = 0;
+
+  [[nodiscard]] virtual Expected<mc::MCInst> lowerInstruction(const MachineInstr &Instruction,
+                                                              MachineMCContext &Context) const = 0;
+
+  [[nodiscard]] virtual Expected<void> emitTerminalInstruction(const MachineInstr &Instruction,
+                                                               MachineMCContext &Context,
+                                                               mc::MCStreamer &Streamer) const;
+
+  [[nodiscard]] virtual Expected<mc::MCSectionDesc>
+  textSection(const MachineFunction &Function) const = 0;
+  [[nodiscard]] virtual Expected<mc::MCSectionDesc>
+  globalSection(const GlobalObjectDesc &Object, MachineMCContext &Context) const = 0;
+  [[nodiscard]] virtual Expected<mc::MCSectionDesc>
+  constantPoolSection(const MachineFunction &Function,
+                      const MachineConstantPoolEntry &Entry) const = 0;
+  [[nodiscard]] virtual Expected<mc::MCSectionDesc>
+  jumpTableSection(const MachineFunction &Function, const MachineJumpTableEntry &Entry) const = 0;
+
+  [[nodiscard]] virtual Expected<void> emitFileHeader(MachineMCContext &Context,
+                                                      mc::MCStreamer &Streamer) const;
+  [[nodiscard]] virtual Expected<void> emitFileTrailer(MachineMCContext &Context,
+                                                       mc::MCStreamer &Streamer) const;
+  [[nodiscard]] virtual Expected<void> emitGenericConstant(const GenericConstantData &Constant,
+                                                           std::uint64_t Size,
+                                                           MachineMCContext &Context,
+                                                           mc::MCStreamer &Streamer) const;
+  [[nodiscard]] virtual Expected<void> emitGlobalInitializer(const GlobalInitializer &Initializer,
+                                                             MachineMCContext &Context,
+                                                             mc::MCStreamer &Streamer) const;
+  [[nodiscard]] virtual Expected<void> emitTargetConstant(const TargetConstant &Constant,
+                                                          MachineMCContext &Context,
+                                                          mc::MCStreamer &Streamer) const;
+  [[nodiscard]] virtual Expected<void> emitTargetJumpTable(const MachineFunction &Function,
+                                                           const MachineJumpTableEntry &Entry,
+                                                           MachineMCContext &Context,
+                                                           mc::MCStreamer &Streamer) const;
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_TARGETMCINSTLOWERING_H
-- 
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