CPU/LoongArch64: Add recompiler

This is mostly a direct translation from the RISC-V backend.

Co-Authored-By: phorcys <phorcys@126.com>

Author: 2 people

src/core/CMakeLists.txt

@@ -196,6 +196,16 @@ if(CPU_ARCH_RISCV64)
   target_link_libraries(core PRIVATE biscuit::biscuit riscv-disas)
   message(STATUS "Building RISC-V-64 recompiler.")
 endif()
+if(CPU_ARCH_LOONGARCH64)
+  target_compile_definitions(core PUBLIC "ENABLE_RECOMPILER=1" "ENABLE_MMAP_FASTMEM=1")
+  target_sources(core PRIVATE
+    ${RECOMPILER_SRCS}
+    cpu_recompiler_loongarch64.cpp
+    cpu_recompiler_loongarch64.h
+  )
+  target_link_libraries(core PRIVATE lagoon)
+  message(STATUS "Building LoongArch64 recompiler.")
+endif()
 
 function(add_core_resources target)
   add_util_resources(${target})

src/core/cpu_recompiler.h

@@ -80,6 +80,19 @@ class Recompiler
   // Align functions to 16 bytes.
   static constexpr u32 FUNCTION_ALIGNMENT = 16;
 
+#elif defined(CPU_ARCH_LOONGARCH64)
+
+  // Number of host registers.
+  static constexpr u32 NUM_HOST_REGS = 32;
+  static constexpr bool HAS_MEMORY_OPERANDS = false;
+
+  // A reasonable "maximum" number of bytes per instruction.
+  static constexpr u32 MAX_NEAR_HOST_BYTES_PER_INSTRUCTION = 64;
+  static constexpr u32 MIN_CODE_RESERVE_FOR_BLOCK = 512;
+
+  // Align functions to 16 bytes.
+  static constexpr u32 FUNCTION_ALIGNMENT = 16;
+
 #endif
 
 public: