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- /*-
- * Copyright (c) 1980 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)sconv.c 5.3 (Berkeley) 4/16/91";
- #endif /* not lint */
-
- /*
- * functions to help pi put out
- * polish postfix binary portable c compiler intermediate code
- * thereby becoming the portable pascal compiler
- */
-
- #include "whoami.h"
- #ifdef PC
- #include "0.h"
- #include <pcc.h>
-
- /*
- * this routine enforces ``the usual arithmetic conversions''
- * all integral operands are converted to ints.
- * if either operand is a double, both are made to be double.
- * this routine takes struct nl *'s for the types,
- * and returns both the struct nl * and the p2type for the result.
- */
- tuac(thistype, thattype, resulttypep, resultp2typep)
- struct nl *thistype;
- struct nl *thattype;
- struct nl **resulttypep;
- int *resultp2typep;
- {
- int thisp2type = p2type(thistype);
- int thatp2type = p2type(thattype);
-
- *resulttypep = thistype;
- *resultp2typep = thisp2type;
- /*
- * should only be passed scalars
- */
- if (isnta(thistype,"sbcid") || isnta(thattype,"sbcid")) {
- return;
- }
- if (thisp2type == PCCT_CHAR || thisp2type == PCCT_SHORT) {
- *resultp2typep = PCCT_INT;
- *resulttypep = nl + T4INT;
- }
- if (*resultp2typep == PCCT_INT && thatp2type == PCCT_DOUBLE) {
- *resultp2typep = PCCT_DOUBLE;
- *resulttypep = nl + TDOUBLE;
- }
- sconv(thisp2type, *resultp2typep);
- }
-
- /*
- * this routine will emit sconv operators when it thinks they are needed.
- * this is code generator specific, rather than machine-specific.
- * this routine takes p2types for arguments, not struct nl *'s.
- */
- #if defined(vax) || defined(tahoe)
- /*
- * the vax code genrator is very good, this routine is extremely boring.
- */
- sconv(fromp2type, top2type)
- int fromp2type;
- int top2type;
- {
-
- switch (top2type) {
- case PCCT_CHAR:
- case PCCT_SHORT:
- case PCCT_INT:
- switch (fromp2type) {
- case PCCT_CHAR:
- case PCCT_SHORT:
- case PCCT_INT:
- case PCCT_DOUBLE:
- return; /* pass1 knows how to do these */
- default:
- return;
- }
- case PCCT_DOUBLE:
- switch (fromp2type) {
- case PCCT_CHAR:
- case PCCT_SHORT:
- case PCCT_INT:
- putop(PCC_SCONV, PCCT_DOUBLE);
- return;
- case PCCT_DOUBLE:
- return;
- default:
- return;
- }
- default:
- return;
- }
- }
- #endif vax || tahoe
- #ifdef mc68000
- /*
- * i don't know how much to trust the mc68000 compiler,
- * so this routine is full.
- */
- sconv(fromp2type, top2type)
- int fromp2type;
- int top2type;
- {
-
- switch (top2type) {
- case PCCT_CHAR:
- switch (fromp2type) {
- case PCCT_CHAR:
- return;
- case PCCT_SHORT:
- case PCCT_INT:
- case PCCT_DOUBLE:
- putop(PCC_SCONV, PCCT_CHAR);
- return;
- default:
- return;
- }
- case PCCT_SHORT:
- switch (fromp2type) {
- case PCCT_SHORT:
- return;
- case PCCT_CHAR:
- case PCCT_INT:
- case PCCT_DOUBLE:
- putop(PCC_SCONV, PCCT_SHORT);
- return;
- default:
- return;
- }
- case PCCT_INT:
- switch (fromp2type) {
- case PCCT_INT:
- return;
- case PCCT_CHAR:
- case PCCT_SHORT:
- case PCCT_DOUBLE:
- putop(PCC_SCONV, PCCT_INT);
- return;
- default:
- return;
- }
- case PCCT_DOUBLE:
- switch (fromp2type) {
- case PCCT_DOUBLE:
- return;
- case PCCT_CHAR:
- case PCCT_SHORT:
- case PCCT_INT:
- putop(PCC_SCONV, PCCT_DOUBLE);
- return;
- default:
- return;
- }
- default:
- return;
- }
- }
- #endif mc68000
- #endif PC
-