jit/ir: Add IR types

Signed-off-by: Ronald Caesar <github43132@proton.me>

Author: GloriousTacoo

src/jit/CMakeLists.txt

@@ -0,0 +1,13 @@
+add_library(jit STATIC)
+
+target_sources(jit PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/decoder/arm32.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/ir/type.cpp
+)
+
+target_link_libraries(jit PRIVATE common host)
+
+target_include_directories(jit PUBLIC
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    ${CMAKE_CURRENT_SOURCE_DIR}/..
+)

src/jit/ir/type.cpp

@@ -0,0 +1,24 @@
+namespace pound::jit::decoder
+{
+typedef enum {
+    IR_TYPE_VOID        = 0,
+    IR_TYPE_U1          = 1 << 0,
+    IR_TYPE_U8          = 1 << 1,
+    IR_TYPE_U16         = 1 << 2,
+    IR_TYPE_U32         = 1 << 3,
+    IR_TYPE_U64         = 1 << 4,
+    IR_TYPE_U128        = 1 << 5,
+    IR_TYPE_A32_REG     = 1 << 6,  // ARM32 GPR R0-R14
+    IR_TYPE_A32_EXT_REG = 1 << 7,  // ARM32 Extended Registers (e.g., for VFP/NEON, or just R15 if treated specially)
+    IR_TYPE_A32_CPSR    = 1 << 8,  // ARM32 CPSR/SPSR
+    IR_TYPE_COND        = 1 << 9,  // Condition codes
+    IR_TYPE_ACC_TYPE    = 1 << 10, // Memory access type
+    IR_TYPE_OPAQUE      = 1 << 11, // Represents a value defined by another IR instruction
+} ir_type_t;
+
+bool ir_are_types_compatible(ir_type_t t1, ir_type_t t2)
+{
+    const bool is_compatible = (t1 == t2) || (IR_TYPE_OPAQUE == t1) || (IR_TYPE_OPAQUE == t2);
+    return is_compatible;
+}
+}