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annotate lwasm/insn_inh.c @ 377:67373a053c49

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Add ?rts target for branch instructions Add a ?rts target for branch instructions, which brances to the nearest RTS or inverts the branch logic to branch around a generated RTS. Activated by a pragma "qrts". Thanks to Erik G <erik@6809.org> for the patch.
author William Astle <lost@l-w.ca>
date Mon, 13 Jul 2015 20:50:02 -0600
parents 35d4213e6657
children 4fd16faa4d93
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1 /*
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2 insn_inh.c
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3 Copyright © 2010 William Astle
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4
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5 This file is part of LWASM.
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6
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7 LWASM is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 */
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21
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22 #include "lwasm.h"
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23 #include "instab.h"
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25 PARSEFUNC(insn_parse_inh)
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26 {
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27 l -> len = OPLEN(instab[l -> insn].ops[0]);
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28 skip_operand(p);
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29 }
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31 EMITFUNC(insn_emit_inh)
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32 {
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33 lwasm_emitop(l, instab[l -> insn].ops[0]);
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34 }
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35
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36 PARSEFUNC(insn_parse_inh6800)
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37 {
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38 // there may be two operations here so check for both
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39 l -> len = OPLEN(instab[l -> insn].ops[0]);
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40 if (instab[l -> insn].ops[1] >= 0)
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41 l -> len += OPLEN(instab[l -> insn].ops[1]);
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42 }
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43
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44 EMITFUNC(insn_emit_inh6800)
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45 {
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46 // there may be two operations here so check for both
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47 lwasm_emitop(l, instab[l -> insn].ops[0]);
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48 if (instab[l -> insn].ops[1] >= 0)
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49 lwasm_emitop(l, instab[l -> insn].ops[1]);
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50
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51 l -> cycle_adj = instab[l -> insn].ops[3];
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52 }