Byte code for SMALL_INT uses 3 bytes for integer.

py/emitbc.c

@@ -106,11 +106,12 @@ static void emit_write_byte_1_byte(emit_t* emit, byte b1, uint b2) {
 }
 
 static void emit_write_byte_1_int(emit_t* emit, byte b1, int num) {
-    assert((num & (~0x7fff)) == 0 || (num & (~0x7fff)) == (~0x7fff));
-    byte* c = emit_get_cur_to_write_bytes(emit, 3);
+    assert((num & (~0x7fffff)) == 0 || (num & (~0x7fffff)) == (~0x7fffff));
+    byte* c = emit_get_cur_to_write_bytes(emit, 4);
     c[0] = b1;
     c[1] = num;
     c[2] = num >> 8;
+    c[3] = num >> 16;
 }
 
 static void emit_write_byte_1_uint(emit_t* emit, byte b1, uint num) {
@@ -186,8 +187,8 @@ static void emit_bc_label_assign(emit_t *emit, int l) {
         emit->label_offsets[l] = emit->code_offset;
     } else if (emit->pass == PASS_3) {
         // ensure label offset has not changed from PASS_2 to PASS_3
+        //printf("l%d: (at %d vs %d)\n", l, emit->code_offset, emit->label_offsets[l]);
         assert(emit->label_offsets[l] == emit->code_offset);
-        //printf("l%d: (at %d)\n", l, emit->code_offset);
     }
 }
 

py/vm.c

@@ -75,11 +75,11 @@ bool py_execute_byte_code_2(const byte *code, const byte **ip_in_out, py_obj_t *
                         break;
 
                     case PYBC_LOAD_CONST_SMALL_INT:
-                        snum = ip[0] | (ip[1] << 8);
+                        snum = ip[0] | (ip[1] << 8) | (ip[2] << 16);
                         if (snum & 0x8000) {
                             snum |= ~0xffff;
                         }
-                        ip += 2;
+                        ip += 3;
                         PUSH((py_obj_t)(snum << 1 | 1));
                         break;
 
@@ -162,6 +162,11 @@ bool py_execute_byte_code_2(const byte *code, const byte **ip_in_out, py_obj_t *
                         rt_store_name(qstr, POP());
                         break;
 
+                    case PYBC_STORE_GLOBAL:
+                        DECODE_QSTR;
+                        rt_store_global(qstr, POP());
+                        break;
+
                     case PYBC_STORE_ATTR:
                         DECODE_QSTR;
                         rt_store_attr(sp[0], qstr, sp[1]);