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annotate lwasm/insn_rtor.c @ 417:d7b7004b0883

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Update gcc6809 patch to fix an ICE. Add new gcc6809 patch with a fix to an internal compiler error reported by Tormod Volden. It seems whoever created the offending instruction patterns didn't fully understand the instruction contraints system and likely got away with it due to characteristics of the instruction generator in previous versions of gcc. Alas, it causes problems now so unless someone has a brilliant idea how to make it work, addhi_mem_1 and addhi_mem_minus1 have to go. Fortunately, the compiler is smart enough to use an alternate strategy all on its own.
author William Astle <lost@l-w.ca>
date Sun, 27 Mar 2016 21:46:18 -0600
parents b20f14edda5a
children
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1 /*
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2 insn_rtor.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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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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22 #include "lwasm.h"
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23 #include "instab.h"
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25 PARSEFUNC(insn_parse_rtor)
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26 {
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27 int r0, r1;
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28
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29 static const char *regs = "D X Y U S PCW V A B CCDP0 0 E F ";
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30 static const char *regs9 = "D X Y U S PC A B CCDP ";
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31
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32 // register to register (r0,r1)
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33 // registers are in order:
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34 // D,X,Y,U,S,PC,W,V
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35 // A,B,CC,DP,0,0,E,F
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36
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37 r0 = lwasm_lookupreg2(!CURPRAGMA(l, PRAGMA_6809) ? regs : regs9, p);
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38 lwasm_skip_to_next_token(l, p);
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39 if (r0 < 0 || *(*p)++ != ',')
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40 {
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41 lwasm_register_error(as, l, E_OPERAND_BAD);
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42 r0 = r1 = 0;
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43 }
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44 else
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45 {
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46 lwasm_skip_to_next_token(l, p);
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47 r1 = lwasm_lookupreg2(!CURPRAGMA(l, PRAGMA_6809) ? regs : regs9, p);
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48 if (r1 < 0)
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49 {
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50 lwasm_register_error(as, l, E_OPERAND_BAD);
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51 r0 = r1 = 0;
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52 }
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53 }
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54 l -> pb = (r0 << 4) | r1;
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55 l -> len = OPLEN(instab[l -> insn].ops[0]) + 1;
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56 }
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57
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58 EMITFUNC(insn_emit_rtor)
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59 {
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60 lwasm_emitop(l, instab[l -> insn].ops[0]);
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61 lwasm_emit(l, l -> pb);
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62 }