diff options
| -rw-r--r-- | mixlib/xmix_vm.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/mixlib/xmix_vm.c b/mixlib/xmix_vm.c index d4b2087..b9c743b 100644 --- a/mixlib/xmix_vm.c +++ b/mixlib/xmix_vm.c @@ -1,7 +1,7 @@ /* ---------------------- xmix_vm.c : * Implementation of the functions declared in xmix_vm.h * ------------------------------------------------------------------ - * Copyright (C) 2000, 2003, 2004, 2007 Free Software Foundation, Inc. + * Copyright (C) 2000, 2003, 2004, 2007, 2010 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -199,24 +199,28 @@ sla_handler_ (mix_vm_t *vm, const mix_ins_t *ins) static gboolean mov_handler_ (mix_vm_t *vm, const mix_ins_t *ins) { - mix_short_t from = get_M_ (vm,ins), - to = mix_word_to_short_fast (get_rI_ (vm,1)); + mix_short_t from = get_M_ (vm,ins); + mix_short_t to = mix_word_to_short_fast (get_rI_ (vm,1)); guint k, delta = ins->fspec; g_assert (ins->opcode == mix_opMOVE); - if (mix_short_is_positive (from) - && mix_short_is_positive (to) - && MEMOK_ (from + delta -1) - && MEMOK_ (to + delta - 1)) + + gboolean result = (delta == 0) + || (mix_short_is_positive (from) + && mix_short_is_positive (to) + && MEMOK_ (from + delta -1) + && MEMOK_ (to + delta - 1)); + + if (result && delta > 0) { for (k = 0; k < delta; ++k) set_cell_ (vm, to+k, get_cell_ (vm, from+k)); set_rI_ (vm, 1, to+delta); - inc_loc_ (vm); return TRUE; } - else - return FALSE; + + if (result) inc_loc_ (vm); + return result; } static gboolean |