implement extended const expr for interp

Author: kylo5aby

build-scripts/config_common.cmake

@@ -211,6 +211,10 @@ if (NOT DEFINED WAMR_BUILD_TAIL_CALL)
   set (WAMR_BUILD_TAIL_CALL 0)
 endif ()
 
+if (NOT DEFINED WAMR_BUILD_EXTENDED_CONST_EXPR)
+  set (WAMR_BUILD_EXTENDED_CONST_EXPR 0)
+endif ()
+
 ########################################
 # Compilation options to marco
 ########################################
@@ -675,7 +679,13 @@ if (WAMR_BUILD_INSTRUCTION_METERING EQUAL 1)
   message ("     Instruction metering enabled")
   add_definitions (-DWASM_ENABLE_INSTRUCTION_METERING=1)
 endif ()
-
+if (WAMR_BUILD_EXTENDED_CONST_EXPR EQUAL 1)
+  message ("     Extended constant expression enabled")
+  add_definitions(-DWASM_ENABLE_EXTENDED_CONST_EXPR=1)
+else()
+  message ("     Extended constant expression disabled")
+  add_definitions(-DWASM_ENABLE_EXTENDED_CONST_EXPR=0)
+endif ()
 ########################################
 # Show Phase4 Wasm proposals status.
 ########################################
@@ -699,11 +709,11 @@ message (
 "       \"Tail call\" via WAMR_BUILD_TAIL_CALL: ${WAMR_BUILD_TAIL_CALL}\n"
 "       \"Threads\" via WAMR_BUILD_SHARED_MEMORY: ${WAMR_BUILD_SHARED_MEMORY}\n"
 "       \"Typed Function References\" via WAMR_BUILD_GC: ${WAMR_BUILD_GC}\n"
+"       \"Extended Constant Expressions\" via WAMR_BUILD_EXTENDED_CONST_EXPR: ${WAMR_BUILD_EXTENDED_CONST_EXPR}\n"
 "     Unsupported (>= Phase4):\n"
 "       \"Branch Hinting\"\n"
 "       \"Custom Annotation Syntax in the Text Format\"\n"
 "       \"Exception handling\"\n"
-"       \"Extended Constant Expressions\"\n"
 "       \"Import/Export of Mutable Globals\"\n"
 "       \"JS String Builtins\"\n"
 "       \"Relaxed SIMD\"\n"

core/iwasm/common/wasm_loader_common.c

@@ -225,3 +225,32 @@ read_leb(uint8 **p_buf, const uint8 *buf_end, uint32 maxbits, bool sign,
             return false;
     }
 }
+
+#if WASM_ENABLE_EXTENDED_CONST_EXPR != 0
+void
+destroy_init_expr_recursive(InitializerExpression *expr)
+{
+    if (expr == NULL) {
+        return;
+    }
+    if (expr->l_expr) {
+        destroy_init_expr_recursive(expr->l_expr);
+    }
+    if (expr->r_expr) {
+        destroy_init_expr_recursive(expr->r_expr);
+    }
+    wasm_runtime_free(expr);
+}
+
+void
+destroy_sub_init_expr(InitializerExpression *expr)
+{
+    if (expr->l_expr) {
+        destroy_init_expr_recursive(expr->l_expr);
+    }
+    if (expr->r_expr) {
+        destroy_init_expr_recursive(expr->r_expr);
+    }
+    expr->l_expr = expr->r_expr = NULL;
+}
+#endif /* end of WASM_ENABLE_EXTENDED_CONST_EXPR != 0 */

core/iwasm/interpreter/wasm.h

@@ -135,6 +135,12 @@ typedef void *table_elem_type_t;
 #define INIT_EXPR_TYPE_F64_CONST 0x44
 #define INIT_EXPR_TYPE_V128_CONST 0xFD
 #define INIT_EXPR_TYPE_GET_GLOBAL 0x23
+#define INIT_EXPR_TYPE_I32_ADD 0x6A
+#define INIT_EXPR_TYPE_I32_SUB 0x6B
+#define INIT_EXPR_TYPE_I32_MUL 0x6C
+#define INIT_EXPR_TYPE_I64_ADD 0x7C
+#define INIT_EXPR_TYPE_I64_SUB 0x7D
+#define INIT_EXPR_TYPE_I64_MUL 0x7E
 #define INIT_EXPR_TYPE_REFNULL_CONST 0xD0
 #define INIT_EXPR_TYPE_FUNCREF_CONST 0xD2
 #define INIT_EXPR_TYPE_STRUCT_NEW 0xD3
@@ -278,8 +284,28 @@ typedef struct InitializerExpression {
        constant expression */
     uint8 init_expr_type;
     WASMValue u;
+#if WASM_ENABLE_EXTENDED_CONST_EXPR != 0
+    struct InitializerExpression *l_expr;
+    struct InitializerExpression *r_expr;
+#endif
 } InitializerExpression;
 
+static inline bool
+is_expr_binary_op(uint8 flag)
+{
+    return flag == INIT_EXPR_TYPE_I32_ADD || flag == INIT_EXPR_TYPE_I32_SUB
+           || flag == INIT_EXPR_TYPE_I32_MUL || flag == INIT_EXPR_TYPE_I64_ADD
+           || flag == INIT_EXPR_TYPE_I64_SUB || flag == INIT_EXPR_TYPE_I64_MUL;
+}
+
+#if WASM_ENABLE_EXTENDED_CONST_EXPR != 0
+void
+destroy_init_expr_recursive(InitializerExpression *expr);
+
+void
+destroy_sub_init_expr(InitializerExpression *expr);
+#endif
+
 #if WASM_ENABLE_GC != 0
 /**
  * Reference type of (ref null ht) or (ref ht),