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- 1.1
- date 91.03.18.12.18.49; author kupfer; state Exp;
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- desc
- @Add two unsigned quads.
- @
-
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @/*
- * Quad_AddUns.c --
- *
- * Quad_AddUns libc routine.
- *
- * Copyright 1991 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that this copyright
- * notice appears in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /sprite/lib/forms/RCS/proto.c,v 1.5 91/02/09 13:24:44 ouster Exp $ SPRITE (Berkeley)";
- #endif /* not lint */
-
- #include <quad.h>
-
-
- /*
- *----------------------------------------------------------------------
- *
- * Quad_AddUns --
- *
- * Add an unsigned quad to another unsigned quad. The temporary
- * variable is needed so that a u_quad can be added to itself.
- *
- * Results:
- * The sum of the 2 arguments.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- void
- Quad_AddUns(uQuad1, uQuad2, resultPtr)
- u_quad uQuad1; /* in */
- u_quad uQuad2; /* in */
- u_quad *resultPtr; /* out */
- {
- unsigned long newLeastSig; /* new least significant word */
-
- newLeastSig = uQuad1.val[QUAD_LEAST_SIG] + uQuad2.val[QUAD_LEAST_SIG];
- resultPtr->val[QUAD_MOST_SIG] = uQuad1.val[QUAD_MOST_SIG]
- + uQuad2.val[QUAD_MOST_SIG];
- if (newLeastSig < uQuad1.val[QUAD_LEAST_SIG]
- && newLeastSig < uQuad2.val[QUAD_LEAST_SIG]) {
- resultPtr->val[QUAD_MOST_SIG]++;
- }
- resultPtr->val[QUAD_LEAST_SIG] = newLeastSig;
- }
- @
-