Mercurial > hg-old > index.cgi
annotate lwasm/insn_rtor.c @ 212:bae1e3ecdce1
More preparation for gnulib integration
author | lost |
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date | Fri, 24 Apr 2009 06:43:02 +0000 |
parents | 427e268e876b |
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1 /* |
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2 insn_rtor.c |
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3 Copyright © 2009 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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11 |
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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 for handling register to register mode instructions |
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23 */ |
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24 |
32 | 25 #define __insn_rtor_c_seen__ |
212 | 26 #include <config.h> |
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27 #include "lwasm.h" |
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28 #include "instab.h" |
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29 |
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30 OPFUNC(insn_rtor) |
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31 { |
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32 int r0, r1; |
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33 static const char *regs = "D X Y U S PCW V A B CCDP0 0 E F "; |
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34 |
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35 lwasm_emitop(as, l, instab[opnum].ops[0]); |
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36 // register to register (r0,r1) |
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37 // registers are in order: |
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38 // D,X,Y,U,S,PC,W,V |
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39 // A,B,CC,DP,0,0,E,F |
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40 r0 = lwasm_lookupreg2(regs, p); |
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41 if (r0 < 0 || *(*p)++ != ',') |
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42 { |
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43 register_error(as, l, 1, "Bad operand"); |
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44 r0 = r1 = 0; |
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45 } |
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46 else |
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47 { |
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48 r1 = lwasm_lookupreg2(regs, p); |
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49 if (r1 < 0) |
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50 { |
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51 register_error(as, l, 1, "Bad operand"); |
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52 r0 = r1 = 0; |
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53 } |
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54 } |
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55 lwasm_emit(as, l, (r0 << 4) | r1); |
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56 } |