132 lines
1.5 KiB
Plaintext
132 lines
1.5 KiB
Plaintext
#include <m2_traps.h>
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;
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; (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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; See the copyright notice in the ACK home directory, in the file "Copyright".
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;
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;
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; Module: CARDINAL operations with overflow checking
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; Author: Ceriel J.H. Jacobs
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; Version: $Header$
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;
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mes 2,EM_WSIZE,EM_PSIZE
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exp $addu
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exp $subu
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exp $mulu
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#if EM_WSIZE < EM_LSIZE
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exp $addul
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exp $subul
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exp $mulul
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#endif
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pro $addu,0
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loc -1
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lol 0
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sbu EM_WSIZE
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lol EM_WSIZE
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cmu EM_WSIZE
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zge *1
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loc M2_UOVFL
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trp
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1
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lol 0
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lol EM_WSIZE
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adu EM_WSIZE
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stl EM_WSIZE
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ret 0
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end 0
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#if EM_WSIZE < EM_LSIZE
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pro $addul,0
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ldc -1
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ldl 0
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sbu EM_LSIZE
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ldl EM_LSIZE
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cmu EM_LSIZE
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zge *1
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loc M2_UOVFL
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trp
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1
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ldl 0
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ldl EM_LSIZE
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adu EM_LSIZE
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sdl EM_LSIZE
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ret 0
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end 0
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#endif
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pro $mulu,0
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lol 0
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zeq *1
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loc -1
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lol 0
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dvu EM_WSIZE
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lol EM_WSIZE
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cmu EM_WSIZE
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zge *1
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loc M2_UOVFL
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trp
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1
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lol 0
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lol EM_WSIZE
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mlu EM_WSIZE
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stl EM_WSIZE
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ret 0
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end 0
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#if EM_WSIZE < EM_LSIZE
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pro $mulul,0
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ldl 0
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ldc 0
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cmu EM_LSIZE
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zeq *1
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ldc -1
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ldl 0
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dvu EM_LSIZE
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ldl EM_LSIZE
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cmu EM_LSIZE
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zge *1
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loc M2_UOVFL
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trp
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1
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ldl 0
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ldl EM_LSIZE
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mlu EM_LSIZE
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sdl EM_LSIZE
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ret 0
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end 0
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#endif
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pro $subu,0
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lol EM_WSIZE
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lol 0
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cmu EM_WSIZE
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zge *1
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loc M2_UUVFL
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trp
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1
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lol EM_WSIZE
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lol 0
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sbu EM_WSIZE
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stl EM_WSIZE
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ret 0
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end 0
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#if EM_WSIZE < EM_LSIZE
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pro $subul,0
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ldl EM_LSIZE
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ldl 0
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cmu EM_LSIZE
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zge *1
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loc M2_UUVFL
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trp
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1
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ldl EM_LSIZE
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ldl 0
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sbu EM_LSIZE
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sdl EM_LSIZE
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ret 0
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end 0
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#endif
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