commit 047cd40313e39b662650bbf6c8059ab0910e5986
author Paul Sokolovsky <pfalcon@users.sourceforge.net> Wed Feb 19 15:47:59 2014 +0200
committer Paul Sokolovsky <pfalcon@users.sourceforge.net> Wed Feb 19 15:53:41 2014 +0200
tree d883b3da1a95adba26be031b6a462847539f39b9
parent 0f96ec826811e3cec3703141684445bea639e2bc

Bytecode int varlen encoding: support arbitrary values for signed ints too.

py/vm.c

diff --git a/py/vm.c b/py/vm.c
index 0fdf5d4..cab340f 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -156,11 +156,18 @@
                         PUSH(mp_const_ellipsis);
                         break;
 
-                    case MP_BC_LOAD_CONST_SMALL_INT:
-                        unum = (ip[0] | (ip[1] << 8) | (ip[2] << 16)) - 0x800000;
-                        ip += 3;
-                        PUSH(MP_OBJ_NEW_SMALL_INT(unum));
+                    case MP_BC_LOAD_CONST_SMALL_INT: {
+                        int num = 0;
+                        if ((ip[0] & 0x40) != 0) {
+                            // Number is negative
+                            num--;
+                        }
+                        do {
+                            num = (num << 7) | (*ip & 0x7f);
+                        } while ((*ip++ & 0x80) != 0);
+                        PUSH(MP_OBJ_NEW_SMALL_INT(num));
                         break;
+                    }
 
                     case MP_BC_LOAD_CONST_INT:
                         DECODE_QSTR;