#include ; ; (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands. ; See the copyright notice in the ACK home directory, in the file "Copyright". ; ; ; Module: CARDINAL operations with overflow checking ; Author: Ceriel J.H. Jacobs ; Version: $Header$ ; mes 2,EM_WSIZE,EM_PSIZE exp $addu exp $subu exp $mulu #if EM_WSIZE < EM_LSIZE exp $addul exp $subul exp $mulul #endif pro $addu,0 loc -1 lol 0 sbu EM_WSIZE lol EM_WSIZE cmu EM_WSIZE zge *1 loc M2_UOVFL trp 1 lol 0 lol EM_WSIZE adu EM_WSIZE stl EM_WSIZE ret 0 end 0 #if EM_WSIZE < EM_LSIZE pro $addul,0 ldc -1 ldl 0 sbu EM_LSIZE ldl EM_LSIZE cmu EM_LSIZE zge *1 loc M2_UOVFL trp 1 ldl 0 ldl EM_LSIZE adu EM_LSIZE sdl EM_LSIZE ret 0 end 0 #endif pro $mulu,0 lol 0 zeq *1 loc -1 lol 0 dvu EM_WSIZE lol EM_WSIZE cmu EM_WSIZE zge *1 loc M2_UOVFL trp 1 lol 0 lol EM_WSIZE mlu EM_WSIZE stl EM_WSIZE ret 0 end 0 #if EM_WSIZE < EM_LSIZE pro $mulul,0 ldl 0 ldc 0 cmu EM_LSIZE zeq *1 ldc -1 ldl 0 dvu EM_LSIZE ldl EM_LSIZE cmu EM_LSIZE zge *1 loc M2_UOVFL trp 1 ldl 0 ldl EM_LSIZE mlu EM_LSIZE sdl EM_LSIZE ret 0 end 0 #endif pro $subu,0 lol EM_WSIZE lol 0 cmu EM_WSIZE zge *1 loc M2_UUVFL trp 1 lol EM_WSIZE lol 0 sbu EM_WSIZE stl EM_WSIZE ret 0 end 0 #if EM_WSIZE < EM_LSIZE pro $subul,0 ldl EM_LSIZE ldl 0 cmu EM_LSIZE zge *1 loc M2_UUVFL trp 1 ldl EM_LSIZE ldl 0 sbu EM_LSIZE sdl EM_LSIZE ret 0 end 0 #endif