summaryrefslogtreecommitdiff
path: root/target/sh4/translate.c
blob: 58bdfeb4fbd32275b34b256192062b8e42dfb59d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
/*
 *  SH4 translation
 *
 *  Copyright (c) 2005 Samuel Tardieu
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#define DEBUG_DISAS

#include "qemu/osdep.h"
#include "cpu.h"
#include "disas/disas.h"
#include "exec/exec-all.h"
#include "tcg-op.h"
#include "exec/cpu_ldst.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "exec/translator.h"
#include "trace-tcg.h"
#include "exec/log.h"


typedef struct DisasContext {
    DisasContextBase base;

    uint32_t tbflags;  /* should stay unmodified during the TB translation */
    uint32_t envflags; /* should stay in sync with env->flags using TCG ops */
    int memidx;
    int gbank;
    int fbank;
    uint32_t delayed_pc;
    uint32_t features;

    uint16_t opcode;

    bool has_movcal;
} DisasContext;

#if defined(CONFIG_USER_ONLY)
#define IS_USER(ctx) 1
#else
#define IS_USER(ctx) (!(ctx->tbflags & (1u << SR_MD)))
#endif

/* Target-specific values for ctx->base.is_jmp.  */
/* We want to exit back to the cpu loop for some reason.
   Usually this is to recognize interrupts immediately.  */
#define DISAS_STOP    DISAS_TARGET_0

/* global register indexes */
static TCGv cpu_gregs[32];
static TCGv cpu_sr, cpu_sr_m, cpu_sr_q, cpu_sr_t;
static TCGv cpu_pc, cpu_ssr, cpu_spc, cpu_gbr;
static TCGv cpu_vbr, cpu_sgr, cpu_dbr, cpu_mach, cpu_macl;
static TCGv cpu_pr, cpu_fpscr, cpu_fpul;
static TCGv cpu_lock_addr, cpu_lock_value;
static TCGv cpu_fregs[32];

/* internal register indexes */
static TCGv cpu_flags, cpu_delayed_pc, cpu_delayed_cond;

#include "exec/gen-icount.h"

void sh4_translate_init(void)
{
    int i;
    static const char * const gregnames[24] = {
        "R0_BANK0", "R1_BANK0", "R2_BANK0", "R3_BANK0",
        "R4_BANK0", "R5_BANK0", "R6_BANK0", "R7_BANK0",
        "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15",
        "R0_BANK1", "R1_BANK1", "R2_BANK1", "R3_BANK1",
        "R4_BANK1", "R5_BANK1", "R6_BANK1", "R7_BANK1"
    };
    static const char * const fregnames[32] = {
         "FPR0_BANK0",  "FPR1_BANK0",  "FPR2_BANK0",  "FPR3_BANK0",
         "FPR4_BANK0",  "FPR5_BANK0",  "FPR6_BANK0",  "FPR7_BANK0",
         "FPR8_BANK0",  "FPR9_BANK0", "FPR10_BANK0", "FPR11_BANK0",
        "FPR12_BANK0", "FPR13_BANK0", "FPR14_BANK0", "FPR15_BANK0",
         "FPR0_BANK1",  "FPR1_BANK1",  "FPR2_BANK1",  "FPR3_BANK1",
         "FPR4_BANK1",  "FPR5_BANK1",  "FPR6_BANK1",  "FPR7_BANK1",
         "FPR8_BANK1",  "FPR9_BANK1", "FPR10_BANK1", "FPR11_BANK1",
        "FPR12_BANK1", "FPR13_BANK1", "FPR14_BANK1", "FPR15_BANK1",
    };

    for (i = 0; i < 24; i++) {
        cpu_gregs[i] = tcg_global_mem_new_i32(cpu_env,
                                              offsetof(CPUSH4State, gregs[i]),
                                              gregnames[i]);
    }
    memcpy(cpu_gregs + 24, cpu_gregs + 8, 8 * sizeof(TCGv));

    cpu_pc = tcg_global_mem_new_i32(cpu_env,
                                    offsetof(CPUSH4State, pc), "PC");
    cpu_sr = tcg_global_mem_new_i32(cpu_env,
                                    offsetof(CPUSH4State, sr), "SR");
    cpu_sr_m = tcg_global_mem_new_i32(cpu_env,
                                      offsetof(CPUSH4State, sr_m), "SR_M");
    cpu_sr_q = tcg_global_mem_new_i32(cpu_env,
                                      offsetof(CPUSH4State, sr_q), "SR_Q");
    cpu_sr_t = tcg_global_mem_new_i32(cpu_env,
                                      offsetof(CPUSH4State, sr_t), "SR_T");
    cpu_ssr = tcg_global_mem_new_i32(cpu_env,
                                     offsetof(CPUSH4State, ssr), "SSR");
    cpu_spc = tcg_global_mem_new_i32(cpu_env,
                                     offsetof(CPUSH4State, spc), "SPC");
    cpu_gbr = tcg_global_mem_new_i32(cpu_env,
                                     offsetof(CPUSH4State, gbr), "GBR");
    cpu_vbr = tcg_global_mem_new_i32(cpu_env,
                                     offsetof(CPUSH4State, vbr), "VBR");
    cpu_sgr = tcg_global_mem_new_i32(cpu_env,
                                     offsetof(CPUSH4State, sgr), "SGR");
    cpu_dbr = tcg_global_mem_new_i32(cpu_env,
                                     offsetof(CPUSH4State, dbr), "DBR");
    cpu_mach = tcg_global_mem_new_i32(cpu_env,
                                      offsetof(CPUSH4State, mach), "MACH");
    cpu_macl = tcg_global_mem_new_i32(cpu_env,
                                      offsetof(CPUSH4State, macl), "MACL");
    cpu_pr = tcg_global_mem_new_i32(cpu_env,
                                    offsetof(CPUSH4State, pr), "PR");
    cpu_fpscr = tcg_global_mem_new_i32(cpu_env,
                                       offsetof(CPUSH4State, fpscr), "FPSCR");
    cpu_fpul = tcg_global_mem_new_i32(cpu_env,
                                      offsetof(CPUSH4State, fpul), "FPUL");

    cpu_flags = tcg_global_mem_new_i32(cpu_env,
				       offsetof(CPUSH4State, flags), "_flags_");
    cpu_delayed_pc = tcg_global_mem_new_i32(cpu_env,
					    offsetof(CPUSH4State, delayed_pc),
					    "_delayed_pc_");
    cpu_delayed_cond = tcg_global_mem_new_i32(cpu_env,
                                              offsetof(CPUSH4State,
                                                       delayed_cond),
                                              "_delayed_cond_");
    cpu_lock_addr = tcg_global_mem_new_i32(cpu_env,
                                           offsetof(CPUSH4State, lock_addr),
                                           "_lock_addr_");
    cpu_lock_value = tcg_global_mem_new_i32(cpu_env,
                                            offsetof(CPUSH4State, lock_value),
                                            "_lock_value_");

    for (i = 0; i < 32; i++)
        cpu_fregs[i] = tcg_global_mem_new_i32(cpu_env,
                                              offsetof(CPUSH4State, fregs[i]),
                                              fregnames[i]);
}

void superh_cpu_dump_state(CPUState *cs, FILE *f,
                           fprintf_function cpu_fprintf, int flags)
{
    SuperHCPU *cpu = SUPERH_CPU(cs);
    CPUSH4State *env = &cpu->env;
    int i;
    cpu_fprintf(f, "pc=0x%08x sr=0x%08x pr=0x%08x fpscr=0x%08x\n",
                env->pc, cpu_read_sr(env), env->pr, env->fpscr);
    cpu_fprintf(f, "spc=0x%08x ssr=0x%08x gbr=0x%08x vbr=0x%08x\n",
		env->spc, env->ssr, env->gbr, env->vbr);
    cpu_fprintf(f, "sgr=0x%08x dbr=0x%08x delayed_pc=0x%08x fpul=0x%08x\n",
		env->sgr, env->dbr, env->delayed_pc, env->fpul);
    for (i = 0; i < 24; i += 4) {
	cpu_fprintf(f, "r%d=0x%08x r%d=0x%08x r%d=0x%08x r%d=0x%08x\n",
		    i, env->gregs[i], i + 1, env->gregs[i + 1],
		    i + 2, env->gregs[i + 2], i + 3, env->gregs[i + 3]);
    }
    if (env->flags & DELAY_SLOT) {
	cpu_fprintf(f, "in delay slot (delayed_pc=0x%08x)\n",
		    env->delayed_pc);
    } else if (env->flags & DELAY_SLOT_CONDITIONAL) {
	cpu_fprintf(f, "in conditional delay slot (delayed_pc=0x%08x)\n",
		    env->delayed_pc);
    } else if (env->flags & DELAY_SLOT_RTE) {
        cpu_fprintf(f, "in rte delay slot (delayed_pc=0x%08x)\n",
                    env->delayed_pc);
    }
}

static void gen_read_sr(TCGv dst)
{
    TCGv t0 = tcg_temp_new();
    tcg_gen_shli_i32(t0, cpu_sr_q, SR_Q);
    tcg_gen_or_i32(dst, dst, t0);
    tcg_gen_shli_i32(t0, cpu_sr_m, SR_M);
    tcg_gen_or_i32(dst, dst, t0);
    tcg_gen_shli_i32(t0, cpu_sr_t, SR_T);
    tcg_gen_or_i32(dst, cpu_sr, t0);
    tcg_temp_free_i32(t0);
}

static void gen_write_sr(TCGv src)
{
    tcg_gen_andi_i32(cpu_sr, src,
                     ~((1u << SR_Q) | (1u << SR_M) | (1u << SR_T)));
    tcg_gen_extract_i32(cpu_sr_q, src, SR_Q, 1);
    tcg_gen_extract_i32(cpu_sr_m, src, SR_M, 1);
    tcg_gen_extract_i32(cpu_sr_t, src, SR_T, 1);
}

static inline void gen_save_cpu_state(DisasContext *ctx, bool save_pc)
{
    if (save_pc) {
        tcg_gen_movi_i32(cpu_pc, ctx->base.pc_next);
    }
    if (ctx->delayed_pc != (uint32_t) -1) {
        tcg_gen_movi_i32(cpu_delayed_pc, ctx->delayed_pc);
    }
    if ((ctx->tbflags & TB_FLAG_ENVFLAGS_MASK) != ctx->envflags) {
        tcg_gen_movi_i32(cpu_flags, ctx->envflags);
    }
}

static inline bool use_exit_tb(DisasContext *ctx)
{
    return (ctx->tbflags & GUSA_EXCLUSIVE) != 0;
}

static inline bool use_goto_tb(DisasContext *ctx, target_ulong dest)
{
    /* Use a direct jump if in same page and singlestep not enabled */
    if (unlikely(ctx->base.singlestep_enabled || use_exit_tb(ctx))) {
        return false;
    }
#ifndef CONFIG_USER_ONLY
    return (ctx->base.tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
#else
    return true;
#endif
}

static void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest)
{
    if (use_goto_tb(ctx, dest)) {
        tcg_gen_goto_tb(n);
        tcg_gen_movi_i32(cpu_pc, dest);
        tcg_gen_exit_tb((uintptr_t)ctx->base.tb + n);
    } else {
        tcg_gen_movi_i32(cpu_pc, dest);
        if (ctx->base.singlestep_enabled) {
            gen_helper_debug(cpu_env);
        } else if (use_exit_tb(ctx)) {
            tcg_gen_exit_tb(0);
        } else {
            tcg_gen_lookup_and_goto_ptr();
        }
    }
    ctx->base.is_jmp = DISAS_NORETURN;
}

static void gen_jump(DisasContext * ctx)
{
    if (ctx->delayed_pc == -1) {
	/* Target is not statically known, it comes necessarily from a
	   delayed jump as immediate jump are conditinal jumps */
	tcg_gen_mov_i32(cpu_pc, cpu_delayed_pc);
        tcg_gen_discard_i32(cpu_delayed_pc);
        if (ctx->base.singlestep_enabled) {
            gen_helper_debug(cpu_env);
        } else if (use_exit_tb(ctx)) {
            tcg_gen_exit_tb(0);
        } else {
            tcg_gen_lookup_and_goto_ptr();
        }
        ctx->base.is_jmp = DISAS_NORETURN;
    } else {
	gen_goto_tb(ctx, 0, ctx->delayed_pc);
    }
}

/* Immediate conditional jump (bt or bf) */
static void gen_conditional_jump(DisasContext *ctx, target_ulong dest,
                                 bool jump_if_true)
{
    TCGLabel *l1 = gen_new_label();
    TCGCond cond_not_taken = jump_if_true ? TCG_COND_EQ : TCG_COND_NE;

    if (ctx->tbflags & GUSA_EXCLUSIVE) {
        /* When in an exclusive region, we must continue to the end.
           Therefore, exit the region on a taken branch, but otherwise
           fall through to the next instruction.  */
        tcg_gen_brcondi_i32(cond_not_taken, cpu_sr_t, 0, l1);
        tcg_gen_movi_i32(cpu_flags, ctx->envflags & ~GUSA_MASK);
        /* Note that this won't actually use a goto_tb opcode because we
           disallow it in use_goto_tb, but it handles exit + singlestep.  */
        gen_goto_tb(ctx, 0, dest);
        gen_set_label(l1);
        return;
    }

    gen_save_cpu_state(ctx, false);
    tcg_gen_brcondi_i32(cond_not_taken, cpu_sr_t, 0, l1);
    gen_goto_tb(ctx, 0, dest);
    gen_set_label(l1);
    gen_goto_tb(ctx, 1, ctx->base.pc_next + 2);
    ctx->base.is_jmp = DISAS_NORETURN;
}

/* Delayed conditional jump (bt or bf) */
static void gen_delayed_conditional_jump(DisasContext * ctx)
{
    TCGLabel *l1 = gen_new_label();
    TCGv ds = tcg_temp_new();

    tcg_gen_mov_i32(ds, cpu_delayed_cond);
    tcg_gen_discard_i32(cpu_delayed_cond);

    if (ctx->tbflags & GUSA_EXCLUSIVE) {
        /* When in an exclusive region, we must continue to the end.
           Therefore, exit the region on a taken branch, but otherwise
           fall through to the next instruction.  */
        tcg_gen_brcondi_i32(TCG_COND_EQ, ds, 0, l1);

        /* Leave the gUSA region.  */
        tcg_gen_movi_i32(cpu_flags, ctx->envflags & ~GUSA_MASK);
        gen_jump(ctx);

        gen_set_label(l1);
        ctx->base.is_jmp = DISAS_NEXT;
        return;
    }

    tcg_gen_brcondi_i32(TCG_COND_NE, ds, 0, l1);
    gen_goto_tb(ctx, 1, ctx->base.pc_next + 2);
    gen_set_label(l1);
    gen_jump(ctx);
}

static inline void gen_load_fpr64(DisasContext *ctx, TCGv_i64 t, int reg)
{
    /* We have already signaled illegal instruction for odd Dr.  */
    tcg_debug_assert((reg & 1) == 0);
    reg ^= ctx->fbank;
    tcg_gen_concat_i32_i64(t, cpu_fregs[reg + 1], cpu_fregs[reg]);
}

static inline void gen_store_fpr64(DisasContext *ctx, TCGv_i64 t, int reg)
{
    /* We have already signaled illegal instruction for odd Dr.  */
    tcg_debug_assert((reg & 1) == 0);
    reg ^= ctx->fbank;
    tcg_gen_extr_i64_i32(cpu_fregs[reg + 1], cpu_fregs[reg], t);
}

#define B3_0 (ctx->opcode & 0xf)
#define B6_4 ((ctx->opcode >> 4) & 0x7)
#define B7_4 ((ctx->opcode >> 4) & 0xf)
#define B7_0 (ctx->opcode & 0xff)
#define B7_0s ((int32_t) (int8_t) (ctx->opcode & 0xff))
#define B11_0s (ctx->opcode & 0x800 ? 0xfffff000 | (ctx->opcode & 0xfff) : \
  (ctx->opcode & 0xfff))
#define B11_8 ((ctx->opcode >> 8) & 0xf)
#define B15_12 ((ctx->opcode >> 12) & 0xf)

#define REG(x)     cpu_gregs[(x) ^ ctx->gbank]
#define ALTREG(x)  cpu_gregs[(x) ^ ctx->gbank ^ 0x10]
#define FREG(x)    cpu_fregs[(x) ^ ctx->fbank]

#define XHACK(x) ((((x) & 1 ) << 4) | ((x) & 0xe))

#define CHECK_NOT_DELAY_SLOT \
    if (ctx->envflags & DELAY_SLOT_MASK) {  \
        goto do_illegal_slot;               \
    }

#define CHECK_PRIVILEGED \
    if (IS_USER(ctx)) {                     \
        goto do_illegal;                    \
    }

#define CHECK_FPU_ENABLED \
    if (ctx->tbflags & (1u << SR_FD)) {     \
        goto do_fpu_disabled;               \
    }

#define CHECK_FPSCR_PR_0 \
    if (ctx->tbflags & FPSCR_PR) {          \
        goto do_illegal;                    \
    }

#define CHECK_FPSCR_PR_1 \
    if (!(ctx->tbflags & FPSCR_PR)) {       \
        goto do_illegal;                    \
    }

#define CHECK_SH4A \
    if (!(ctx->features & SH_FEATURE_SH4A)) { \
        goto do_illegal;                      \
    }

static void _decode_opc(DisasContext * ctx)
{
    /* This code tries to make movcal emulation sufficiently
       accurate for Linux purposes.  This instruction writes
       memory, and prior to that, always allocates a cache line.
       It is used in two contexts:
       - in memcpy, where data is copied in blocks, the first write
       of to a block uses movca.l for performance.
       - in arch/sh/mm/cache-sh4.c, movcal.l + ocbi combination is used
       to flush the cache. Here, the data written by movcal.l is never
       written to memory, and the data written is just bogus.

       To simulate this, we simulate movcal.l, we store the value to memory,
       but we also remember the previous content. If we see ocbi, we check
       if movcal.l for that address was done previously. If so, the write should
       not have hit the memory, so we restore the previous content.
       When we see an instruction that is neither movca.l
       nor ocbi, the previous content is discarded.

       To optimize, we only try to flush stores when we're at the start of
       TB, or if we already saw movca.l in this TB and did not flush stores
       yet.  */
    if (ctx->has_movcal)
	{
	  int opcode = ctx->opcode & 0xf0ff;
	  if (opcode != 0x0093 /* ocbi */
	      && opcode != 0x00c3 /* movca.l */)
	      {
                  gen_helper_discard_movcal_backup(cpu_env);
		  ctx->has_movcal = 0;
	      }
	}

#if 0
    fprintf(stderr, "Translating opcode 0x%04x\n", ctx->opcode);
#endif

    switch (ctx->opcode) {
    case 0x0019:		/* div0u */
        tcg_gen_movi_i32(cpu_sr_m, 0);
        tcg_gen_movi_i32(cpu_sr_q, 0);
        tcg_gen_movi_i32(cpu_sr_t, 0);
	return;
    case 0x000b:		/* rts */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_mov_i32(cpu_delayed_pc, cpu_pr);
        ctx->envflags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x0028:		/* clrmac */
	tcg_gen_movi_i32(cpu_mach, 0);
	tcg_gen_movi_i32(cpu_macl, 0);
	return;
    case 0x0048:		/* clrs */
        tcg_gen_andi_i32(cpu_sr, cpu_sr, ~(1u << SR_S));
	return;
    case 0x0008:		/* clrt */
        tcg_gen_movi_i32(cpu_sr_t, 0);
	return;
    case 0x0038:		/* ldtlb */
	CHECK_PRIVILEGED
        gen_helper_ldtlb(cpu_env);
	return;
    case 0x002b:		/* rte */
	CHECK_PRIVILEGED
	CHECK_NOT_DELAY_SLOT
        gen_write_sr(cpu_ssr);
	tcg_gen_mov_i32(cpu_delayed_pc, cpu_spc);
        ctx->envflags |= DELAY_SLOT_RTE;
	ctx->delayed_pc = (uint32_t) - 1;
        ctx->base.is_jmp = DISAS_STOP;
	return;
    case 0x0058:		/* sets */
        tcg_gen_ori_i32(cpu_sr, cpu_sr, (1u << SR_S));
	return;
    case 0x0018:		/* sett */
        tcg_gen_movi_i32(cpu_sr_t, 1);
	return;
    case 0xfbfd:		/* frchg */
        CHECK_FPSCR_PR_0
	tcg_gen_xori_i32(cpu_fpscr, cpu_fpscr, FPSCR_FR);
        ctx->base.is_jmp = DISAS_STOP;
	return;
    case 0xf3fd:		/* fschg */
        CHECK_FPSCR_PR_0
        tcg_gen_xori_i32(cpu_fpscr, cpu_fpscr, FPSCR_SZ);
        ctx->base.is_jmp = DISAS_STOP;
	return;
    case 0xf7fd:                /* fpchg */
        CHECK_SH4A
        tcg_gen_xori_i32(cpu_fpscr, cpu_fpscr, FPSCR_PR);
        ctx->base.is_jmp = DISAS_STOP;
        return;
    case 0x0009:		/* nop */
	return;
    case 0x001b:		/* sleep */
	CHECK_PRIVILEGED
        tcg_gen_movi_i32(cpu_pc, ctx->base.pc_next + 2);
        gen_helper_sleep(cpu_env);
	return;
    }

    switch (ctx->opcode & 0xf000) {
    case 0x1000:		/* mov.l Rm,@(disp,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B11_8), B3_0 * 4);
            tcg_gen_qemu_st_i32(REG(B7_4), addr, ctx->memidx, MO_TEUL);
	    tcg_temp_free(addr);
	}
	return;
    case 0x5000:		/* mov.l @(disp,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0 * 4);
            tcg_gen_qemu_ld_i32(REG(B11_8), addr, ctx->memidx, MO_TESL);
	    tcg_temp_free(addr);
	}
	return;
    case 0xe000:		/* mov #imm,Rn */
#ifdef CONFIG_USER_ONLY
        /* Detect the start of a gUSA region.  If so, update envflags
           and end the TB.  This will allow us to see the end of the
           region (stored in R0) in the next TB.  */
        if (B11_8 == 15 && B7_0s < 0 &&
            (tb_cflags(ctx->base.tb) & CF_PARALLEL)) {
            ctx->envflags = deposit32(ctx->envflags, GUSA_SHIFT, 8, B7_0s);
            ctx->base.is_jmp = DISAS_STOP;
        }
#endif
	tcg_gen_movi_i32(REG(B11_8), B7_0s);
	return;
    case 0x9000:		/* mov.w @(disp,PC),Rn */
	{
            TCGv addr = tcg_const_i32(ctx->base.pc_next + 4 + B7_0 * 2);
            tcg_gen_qemu_ld_i32(REG(B11_8), addr, ctx->memidx, MO_TESW);
	    tcg_temp_free(addr);
	}
	return;
    case 0xd000:		/* mov.l @(disp,PC),Rn */
	{
            TCGv addr = tcg_const_i32((ctx->base.pc_next + 4 + B7_0 * 4) & ~3);
            tcg_gen_qemu_ld_i32(REG(B11_8), addr, ctx->memidx, MO_TESL);
	    tcg_temp_free(addr);
	}
	return;
    case 0x7000:		/* add #imm,Rn */
	tcg_gen_addi_i32(REG(B11_8), REG(B11_8), B7_0s);
	return;
    case 0xa000:		/* bra disp */
	CHECK_NOT_DELAY_SLOT
        ctx->delayed_pc = ctx->base.pc_next + 4 + B11_0s * 2;
        ctx->envflags |= DELAY_SLOT;
	return;
    case 0xb000:		/* bsr disp */
	CHECK_NOT_DELAY_SLOT
        tcg_gen_movi_i32(cpu_pr, ctx->base.pc_next + 4);
        ctx->delayed_pc = ctx->base.pc_next + 4 + B11_0s * 2;
        ctx->envflags |= DELAY_SLOT;
	return;
    }

    switch (ctx->opcode & 0xf00f) {
    case 0x6003:		/* mov Rm,Rn */
	tcg_gen_mov_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x2000:		/* mov.b Rm,@Rn */
        tcg_gen_qemu_st_i32(REG(B7_4), REG(B11_8), ctx->memidx, MO_UB);
	return;
    case 0x2001:		/* mov.w Rm,@Rn */
        tcg_gen_qemu_st_i32(REG(B7_4), REG(B11_8), ctx->memidx, MO_TEUW);
	return;
    case 0x2002:		/* mov.l Rm,@Rn */
        tcg_gen_qemu_st_i32(REG(B7_4), REG(B11_8), ctx->memidx, MO_TEUL);
	return;
    case 0x6000:		/* mov.b @Rm,Rn */
        tcg_gen_qemu_ld_i32(REG(B11_8), REG(B7_4), ctx->memidx, MO_SB);
	return;
    case 0x6001:		/* mov.w @Rm,Rn */
        tcg_gen_qemu_ld_i32(REG(B11_8), REG(B7_4), ctx->memidx, MO_TESW);
	return;
    case 0x6002:		/* mov.l @Rm,Rn */
        tcg_gen_qemu_ld_i32(REG(B11_8), REG(B7_4), ctx->memidx, MO_TESL);
	return;
    case 0x2004:		/* mov.b Rm,@-Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 1);
            /* might cause re-execution */
            tcg_gen_qemu_st_i32(REG(B7_4), addr, ctx->memidx, MO_UB);
	    tcg_gen_mov_i32(REG(B11_8), addr);			/* modify register status */
	    tcg_temp_free(addr);
	}
	return;
    case 0x2005:		/* mov.w Rm,@-Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 2);
            tcg_gen_qemu_st_i32(REG(B7_4), addr, ctx->memidx, MO_TEUW);
	    tcg_gen_mov_i32(REG(B11_8), addr);
	    tcg_temp_free(addr);
	}
	return;
    case 0x2006:		/* mov.l Rm,@-Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
            tcg_gen_qemu_st_i32(REG(B7_4), addr, ctx->memidx, MO_TEUL);
	    tcg_gen_mov_i32(REG(B11_8), addr);
        tcg_temp_free(addr);
	}
	return;
    case 0x6004:		/* mov.b @Rm+,Rn */
        tcg_gen_qemu_ld_i32(REG(B11_8), REG(B7_4), ctx->memidx, MO_SB);
	if ( B11_8 != B7_4 )
		tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 1);
	return;
    case 0x6005:		/* mov.w @Rm+,Rn */
        tcg_gen_qemu_ld_i32(REG(B11_8), REG(B7_4), ctx->memidx, MO_TESW);
	if ( B11_8 != B7_4 )
		tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 2);
	return;
    case 0x6006:		/* mov.l @Rm+,Rn */
        tcg_gen_qemu_ld_i32(REG(B11_8), REG(B7_4), ctx->memidx, MO_TESL);
	if ( B11_8 != B7_4 )
		tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 4);
	return;
    case 0x0004:		/* mov.b Rm,@(R0,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
            tcg_gen_qemu_st_i32(REG(B7_4), addr, ctx->memidx, MO_UB);
	    tcg_temp_free(addr);
	}
	return;
    case 0x0005:		/* mov.w Rm,@(R0,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
            tcg_gen_qemu_st_i32(REG(B7_4), addr, ctx->memidx, MO_TEUW);
	    tcg_temp_free(addr);
	}
	return;
    case 0x0006:		/* mov.l Rm,@(R0,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
            tcg_gen_qemu_st_i32(REG(B7_4), addr, ctx->memidx, MO_TEUL);
	    tcg_temp_free(addr);
	}
	return;
    case 0x000c:		/* mov.b @(R0,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
            tcg_gen_qemu_ld_i32(REG(B11_8), addr, ctx->memidx, MO_SB);
	    tcg_temp_free(addr);
	}
	return;
    case 0x000d:		/* mov.w @(R0,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
            tcg_gen_qemu_ld_i32(REG(B11_8), addr, ctx->memidx, MO_TESW);
	    tcg_temp_free(addr);
	}
	return;
    case 0x000e:		/* mov.l @(R0,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
            tcg_gen_qemu_ld_i32(REG(B11_8), addr, ctx->memidx, MO_TESL);
	    tcg_temp_free(addr);
	}
	return;
    case 0x6008:		/* swap.b Rm,Rn */
	{
            TCGv low = tcg_temp_new();
	    tcg_gen_ext16u_i32(low, REG(B7_4));
	    tcg_gen_bswap16_i32(low, low);
            tcg_gen_deposit_i32(REG(B11_8), REG(B7_4), low, 0, 16);
	    tcg_temp_free(low);
	}
	return;
    case 0x6009:		/* swap.w Rm,Rn */
        tcg_gen_rotli_i32(REG(B11_8), REG(B7_4), 16);
	return;
    case 0x200d:		/* xtrct Rm,Rn */
	{
	    TCGv high, low;
	    high = tcg_temp_new();
	    tcg_gen_shli_i32(high, REG(B7_4), 16);
	    low = tcg_temp_new();
	    tcg_gen_shri_i32(low, REG(B11_8), 16);
	    tcg_gen_or_i32(REG(B11_8), high, low);
	    tcg_temp_free(low);
	    tcg_temp_free(high);
	}
	return;
    case 0x300c:		/* add Rm,Rn */
	tcg_gen_add_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x300e:		/* addc Rm,Rn */
        {
            TCGv t0, t1;
            t0 = tcg_const_tl(0);
            t1 = tcg_temp_new();
            tcg_gen_add2_i32(t1, cpu_sr_t, cpu_sr_t, t0, REG(B7_4), t0);
            tcg_gen_add2_i32(REG(B11_8), cpu_sr_t,
                             REG(B11_8), t0, t1, cpu_sr_t);
            tcg_temp_free(t0);
            tcg_temp_free(t1);
        }
	return;
    case 0x300f:		/* addv Rm,Rn */
        {
            TCGv t0, t1, t2;
            t0 = tcg_temp_new();
            tcg_gen_add_i32(t0, REG(B7_4), REG(B11_8));
            t1 = tcg_temp_new();
            tcg_gen_xor_i32(t1, t0, REG(B11_8));
            t2 = tcg_temp_new();
            tcg_gen_xor_i32(t2, REG(B7_4), REG(B11_8));
            tcg_gen_andc_i32(cpu_sr_t, t1, t2);
            tcg_temp_free(t2);
            tcg_gen_shri_i32(cpu_sr_t, cpu_sr_t, 31);
            tcg_temp_free(t1);
            tcg_gen_mov_i32(REG(B7_4), t0);
            tcg_temp_free(t0);
        }
	return;
    case 0x2009:		/* and Rm,Rn */
	tcg_gen_and_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x3000:		/* cmp/eq Rm,Rn */
        tcg_gen_setcond_i32(TCG_COND_EQ, cpu_sr_t, REG(B11_8), REG(B7_4));
	return;
    case 0x3003:		/* cmp/ge Rm,Rn */
        tcg_gen_setcond_i32(TCG_COND_GE, cpu_sr_t, REG(B11_8), REG(B7_4));
	return;
    case 0x3007:		/* cmp/gt Rm,Rn */
        tcg_gen_setcond_i32(TCG_COND_GT, cpu_sr_t, REG(B11_8), REG(B7_4));
	return;
    case 0x3006:		/* cmp/hi Rm,Rn */
        tcg_gen_setcond_i32(TCG_COND_GTU, cpu_sr_t, REG(B11_8), REG(B7_4));
	return;
    case 0x3002:		/* cmp/hs Rm,Rn */
        tcg_gen_setcond_i32(TCG_COND_GEU, cpu_sr_t, REG(B11_8), REG(B7_4));
	return;
    case 0x200c:		/* cmp/str Rm,Rn */
	{
	    TCGv cmp1 = tcg_temp_new();
	    TCGv cmp2 = tcg_temp_new();
            tcg_gen_xor_i32(cmp2, REG(B7_4), REG(B11_8));
            tcg_gen_subi_i32(cmp1, cmp2, 0x01010101);
            tcg_gen_andc_i32(cmp1, cmp1, cmp2);
            tcg_gen_andi_i32(cmp1, cmp1, 0x80808080);
            tcg_gen_setcondi_i32(TCG_COND_NE, cpu_sr_t, cmp1, 0);
	    tcg_temp_free(cmp2);
	    tcg_temp_free(cmp1);
	}
	return;
    case 0x2007:		/* div0s Rm,Rn */
        tcg_gen_shri_i32(cpu_sr_q, REG(B11_8), 31);         /* SR_Q */
        tcg_gen_shri_i32(cpu_sr_m, REG(B7_4), 31);          /* SR_M */
        tcg_gen_xor_i32(cpu_sr_t, cpu_sr_q, cpu_sr_m);      /* SR_T */
	return;
    case 0x3004:		/* div1 Rm,Rn */
        {
            TCGv t0 = tcg_temp_new();
            TCGv t1 = tcg_temp_new();
            TCGv t2 = tcg_temp_new();
            TCGv zero = tcg_const_i32(0);

            /* shift left arg1, saving the bit being pushed out and inserting
               T on the right */
            tcg_gen_shri_i32(t0, REG(B11_8), 31);
            tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 1);
            tcg_gen_or_i32(REG(B11_8), REG(B11_8), cpu_sr_t);

            /* Add or subtract arg0 from arg1 depending if Q == M. To avoid
               using 64-bit temps, we compute arg0's high part from q ^ m, so
               that it is 0x00000000 when adding the value or 0xffffffff when
               subtracting it. */
            tcg_gen_xor_i32(t1, cpu_sr_q, cpu_sr_m);
            tcg_gen_subi_i32(t1, t1, 1);
            tcg_gen_neg_i32(t2, REG(B7_4));
            tcg_gen_movcond_i32(TCG_COND_EQ, t2, t1, zero, REG(B7_4), t2);
            tcg_gen_add2_i32(REG(B11_8), t1, REG(B11_8), zero, t2, t1);

            /* compute T and Q depending on carry */
            tcg_gen_andi_i32(t1, t1, 1);
            tcg_gen_xor_i32(t1, t1, t0);
            tcg_gen_xori_i32(cpu_sr_t, t1, 1);
            tcg_gen_xor_i32(cpu_sr_q, cpu_sr_m, t1);

            tcg_temp_free(zero);
            tcg_temp_free(t2);
            tcg_temp_free(t1);
            tcg_temp_free(t0);
        }
	return;
    case 0x300d:		/* dmuls.l Rm,Rn */
        tcg_gen_muls2_i32(cpu_macl, cpu_mach, REG(B7_4), REG(B11_8));
	return;
    case 0x3005:		/* dmulu.l Rm,Rn */
        tcg_gen_mulu2_i32(cpu_macl, cpu_mach, REG(B7_4), REG(B11_8));
	return;
    case 0x600e:		/* exts.b Rm,Rn */
	tcg_gen_ext8s_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600f:		/* exts.w Rm,Rn */
	tcg_gen_ext16s_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600c:		/* extu.b Rm,Rn */
	tcg_gen_ext8u_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600d:		/* extu.w Rm,Rn */
	tcg_gen_ext16u_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x000f:		/* mac.l @Rm+,@Rn+ */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
            tcg_gen_qemu_ld_i32(arg0, REG(B7_4), ctx->memidx, MO_TESL);
	    arg1 = tcg_temp_new();
            tcg_gen_qemu_ld_i32(arg1, REG(B11_8), ctx->memidx, MO_TESL);
            gen_helper_macl(cpu_env, arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	    tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 4);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
	}
	return;
    case 0x400f:		/* mac.w @Rm+,@Rn+ */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
            tcg_gen_qemu_ld_i32(arg0, REG(B7_4), ctx->memidx, MO_TESL);
	    arg1 = tcg_temp_new();
            tcg_gen_qemu_ld_i32(arg1, REG(B11_8), ctx->memidx, MO_TESL);
            gen_helper_macw(cpu_env, arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 2);
	    tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 2);
	}
	return;
    case 0x0007:		/* mul.l Rm,Rn */
	tcg_gen_mul_i32(cpu_macl, REG(B7_4), REG(B11_8));
	return;
    case 0x200f:		/* muls.w Rm,Rn */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
	    tcg_gen_ext16s_i32(arg0, REG(B7_4));
	    arg1 = tcg_temp_new();
	    tcg_gen_ext16s_i32(arg1, REG(B11_8));
	    tcg_gen_mul_i32(cpu_macl, arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	}
	return;
    case 0x200e:		/* mulu.w Rm,Rn */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
	    tcg_gen_ext16u_i32(arg0, REG(B7_4));
	    arg1 = tcg_temp_new();
	    tcg_gen_ext16u_i32(arg1, REG(B11_8));
	    tcg_gen_mul_i32(cpu_macl, arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	}
	return;
    case 0x600b:		/* neg Rm,Rn */
	tcg_gen_neg_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600a:		/* negc Rm,Rn */
        {
            TCGv t0 = tcg_const_i32(0);
            tcg_gen_add2_i32(REG(B11_8), cpu_sr_t,
                             REG(B7_4), t0, cpu_sr_t, t0);
            tcg_gen_sub2_i32(REG(B11_8), cpu_sr_t,
                             t0, t0, REG(B11_8), cpu_sr_t);
            tcg_gen_andi_i32(cpu_sr_t, cpu_sr_t, 1);
            tcg_temp_free(t0);
        }
	return;
    case 0x6007:		/* not Rm,Rn */
	tcg_gen_not_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x200b:		/* or Rm,Rn */
	tcg_gen_or_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x400c:		/* shad Rm,Rn */
	{
            TCGv t0 = tcg_temp_new();
            TCGv t1 = tcg_temp_new();
            TCGv t2 = tcg_temp_new();

            tcg_gen_andi_i32(t0, REG(B7_4), 0x1f);

            /* positive case: shift to the left */
            tcg_gen_shl_i32(t1, REG(B11_8), t0);

            /* negative case: shift to the right in two steps to
               correctly handle the -32 case */
            tcg_gen_xori_i32(t0, t0, 0x1f);
            tcg_gen_sar_i32(t2, REG(B11_8), t0);
            tcg_gen_sari_i32(t2, t2, 1);

            /* select between the two cases */
            tcg_gen_movi_i32(t0, 0);
            tcg_gen_movcond_i32(TCG_COND_GE, REG(B11_8), REG(B7_4), t0, t1, t2);

            tcg_temp_free(t0);
            tcg_temp_free(t1);
            tcg_temp_free(t2);
	}
	return;
    case 0x400d:		/* shld Rm,Rn */
	{
            TCGv t0 = tcg_temp_new();
            TCGv t1 = tcg_temp_new();
            TCGv t2 = tcg_temp_new();

            tcg_gen_andi_i32(t0, REG(B7_4), 0x1f);

            /* positive case: shift to the left */
            tcg_gen_shl_i32(t1, REG(B11_8), t0);

            /* negative case: shift to the right in two steps to
               correctly handle the -32 case */
            tcg_gen_xori_i32(t0, t0, 0x1f);
            tcg_gen_shr_i32(t2, REG(B11_8), t0);
            tcg_gen_shri_i32(t2, t2, 1);

            /* select between the two cases */
            tcg_gen_movi_i32(t0, 0);
            tcg_gen_movcond_i32(TCG_COND_GE, REG(B11_8), REG(B7_4), t0, t1, t2);

            tcg_temp_free(t0);
            tcg_temp_free(t1);
            tcg_temp_free(t2);
	}
	return;
    case 0x3008:		/* sub Rm,Rn */
	tcg_gen_sub_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x300a:		/* subc Rm,Rn */
        {
            TCGv t0, t1;
            t0 = tcg_const_tl(0);
            t1 = tcg_temp_new();
            tcg_gen_add2_i32(t1, cpu_sr_t, cpu_sr_t, t0, REG(B7_4), t0);
            tcg_gen_sub2_i32(REG(B11_8), cpu_sr_t,
                             REG(B11_8), t0, t1, cpu_sr_t);
            tcg_gen_andi_i32(cpu_sr_t, cpu_sr_t, 1);
            tcg_temp_free(t0);
            tcg_temp_free(t1);
        }
	return;
    case 0x300b:		/* subv Rm,Rn */
        {
            TCGv t0, t1, t2;
            t0 = tcg_temp_new();
            tcg_gen_sub_i32(t0, REG(B11_8), REG(B7_4));
            t1 = tcg_temp_new();
            tcg_gen_xor_i32(t1, t0, REG(B7_4));
            t2 = tcg_temp_new();
            tcg_gen_xor_i32(t2, REG(B11_8), REG(B7_4));
            tcg_gen_and_i32(t1, t1, t2);
            tcg_temp_free(t2);
            tcg_gen_shri_i32(cpu_sr_t, t1, 31);
            tcg_temp_free(t1);
            tcg_gen_mov_i32(REG(B11_8), t0);
            tcg_temp_free(t0);
        }
	return;
    case 0x2008:		/* tst Rm,Rn */
	{
	    TCGv val = tcg_temp_new();
	    tcg_gen_and_i32(val, REG(B7_4), REG(B11_8));
            tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_sr_t, val, 0);
	    tcg_temp_free(val);
	}
	return;
    case 0x200a:		/* xor Rm,Rn */
	tcg_gen_xor_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0xf00c: /* fmov {F,D,X}Rm,{F,D,X}Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        if (ctx->tbflags & FPSCR_SZ) {
            int xsrc = XHACK(B7_4);
            int xdst = XHACK(B11_8);
            tcg_gen_mov_i32(FREG(xdst), FREG(xsrc));
            tcg_gen_mov_i32(FREG(xdst + 1), FREG(xsrc + 1));
	} else {
            tcg_gen_mov_i32(FREG(B11_8), FREG(B7_4));
	}
	return;
    case 0xf00a: /* fmov {F,D,X}Rm,@Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        if (ctx->tbflags & FPSCR_SZ) {
            TCGv_i64 fp = tcg_temp_new_i64();
            gen_load_fpr64(ctx, fp, XHACK(B7_4));
            tcg_gen_qemu_st_i64(fp, REG(B11_8), ctx->memidx, MO_TEQ);
            tcg_temp_free_i64(fp);
	} else {
            tcg_gen_qemu_st_i32(FREG(B7_4), REG(B11_8), ctx->memidx, MO_TEUL);
	}
	return;
    case 0xf008: /* fmov @Rm,{F,D,X}Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        if (ctx->tbflags & FPSCR_SZ) {
            TCGv_i64 fp = tcg_temp_new_i64();
            tcg_gen_qemu_ld_i64(fp, REG(B7_4), ctx->memidx, MO_TEQ);
            gen_store_fpr64(ctx, fp, XHACK(B11_8));
            tcg_temp_free_i64(fp);
	} else {
            tcg_gen_qemu_ld_i32(FREG(B11_8), REG(B7_4), ctx->memidx, MO_TEUL);
	}
	return;
    case 0xf009: /* fmov @Rm+,{F,D,X}Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        if (ctx->tbflags & FPSCR_SZ) {
            TCGv_i64 fp = tcg_temp_new_i64();
            tcg_gen_qemu_ld_i64(fp, REG(B7_4), ctx->memidx, MO_TEQ);
            gen_store_fpr64(ctx, fp, XHACK(B11_8));
            tcg_temp_free_i64(fp);
            tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 8);
	} else {
            tcg_gen_qemu_ld_i32(FREG(B11_8), REG(B7_4), ctx->memidx, MO_TEUL);
	    tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 4);
	}
	return;
    case 0xf00b: /* fmov {F,D,X}Rm,@-Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        {
            TCGv addr = tcg_temp_new_i32();
            if (ctx->tbflags & FPSCR_SZ) {
                TCGv_i64 fp = tcg_temp_new_i64();
                gen_load_fpr64(ctx, fp, XHACK(B7_4));
                tcg_gen_subi_i32(addr, REG(B11_8), 8);
                tcg_gen_qemu_st_i64(fp, addr, ctx->memidx, MO_TEQ);
                tcg_temp_free_i64(fp);
            } else {
                tcg_gen_subi_i32(addr, REG(B11_8), 4);
                tcg_gen_qemu_st_i32(FREG(B7_4), addr, ctx->memidx, MO_TEUL);
            }
            tcg_gen_mov_i32(REG(B11_8), addr);
            tcg_temp_free(addr);
        }
	return;
    case 0xf006: /* fmov @(R0,Rm),{F,D,X}Rm - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	{
	    TCGv addr = tcg_temp_new_i32();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
            if (ctx->tbflags & FPSCR_SZ) {
                TCGv_i64 fp = tcg_temp_new_i64();
                tcg_gen_qemu_ld_i64(fp, addr, ctx->memidx, MO_TEQ);
                gen_store_fpr64(ctx, fp, XHACK(B11_8));
                tcg_temp_free_i64(fp);
	    } else {
                tcg_gen_qemu_ld_i32(FREG(B11_8), addr, ctx->memidx, MO_TEUL);
	    }
	    tcg_temp_free(addr);
	}
	return;
    case 0xf007: /* fmov {F,D,X}Rn,@(R0,Rn) - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
            if (ctx->tbflags & FPSCR_SZ) {
                TCGv_i64 fp = tcg_temp_new_i64();
                gen_load_fpr64(ctx, fp, XHACK(B7_4));
                tcg_gen_qemu_st_i64(fp, addr, ctx->memidx, MO_TEQ);
                tcg_temp_free_i64(fp);
	    } else {
                tcg_gen_qemu_st_i32(FREG(B7_4), addr, ctx->memidx, MO_TEUL);
	    }
	    tcg_temp_free(addr);
	}
	return;
    case 0xf000: /* fadd Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf001: /* fsub Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf002: /* fmul Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf003: /* fdiv Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf004: /* fcmp/eq Rm,Rn - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
    case 0xf005: /* fcmp/gt Rm,Rn - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
	{
	    CHECK_FPU_ENABLED
            if (ctx->tbflags & FPSCR_PR) {
                TCGv_i64 fp0, fp1;

                if (ctx->opcode & 0x0110) {
                    goto do_illegal;
                }
		fp0 = tcg_temp_new_i64();
		fp1 = tcg_temp_new_i64();
                gen_load_fpr64(ctx, fp0, B11_8);
                gen_load_fpr64(ctx, fp1, B7_4);
                switch (ctx->opcode & 0xf00f) {
                case 0xf000:		/* fadd Rm,Rn */
                    gen_helper_fadd_DT(fp0, cpu_env, fp0, fp1);
                    break;
                case 0xf001:		/* fsub Rm,Rn */
                    gen_helper_fsub_DT(fp0, cpu_env, fp0, fp1);
                    break;
                case 0xf002:		/* fmul Rm,Rn */
                    gen_helper_fmul_DT(fp0, cpu_env, fp0, fp1);
                    break;
                case 0xf003:		/* fdiv Rm,Rn */
                    gen_helper_fdiv_DT(fp0, cpu_env, fp0, fp1);
                    break;
                case 0xf004:		/* fcmp/eq Rm,Rn */
                    gen_helper_fcmp_eq_DT(cpu_sr_t, cpu_env, fp0, fp1);
                    return;
                case 0xf005:		/* fcmp/gt Rm,Rn */
                    gen_helper_fcmp_gt_DT(cpu_sr_t, cpu_env, fp0, fp1);
                    return;
                }
                gen_store_fpr64(ctx, fp0, B11_8);
                tcg_temp_free_i64(fp0);
                tcg_temp_free_i64(fp1);
	    } else {
                switch (ctx->opcode & 0xf00f) {
                case 0xf000:		/* fadd Rm,Rn */
                    gen_helper_fadd_FT(FREG(B11_8), cpu_env,
                                       FREG(B11_8), FREG(B7_4));
                    break;
                case 0xf001:		/* fsub Rm,Rn */
                    gen_helper_fsub_FT(FREG(B11_8), cpu_env,
                                       FREG(B11_8), FREG(B7_4));
                    break;
                case 0xf002:		/* fmul Rm,Rn */
                    gen_helper_fmul_FT(FREG(B11_8), cpu_env,
                                       FREG(B11_8), FREG(B7_4));
                    break;
                case 0xf003:		/* fdiv Rm,Rn */
                    gen_helper_fdiv_FT(FREG(B11_8), cpu_env,
                                       FREG(B11_8), FREG(B7_4));
                    break;
                case 0xf004:		/* fcmp/eq Rm,Rn */
                    gen_helper_fcmp_eq_FT(cpu_sr_t, cpu_env,
                                          FREG(B11_8), FREG(B7_4));
                    return;
                case 0xf005:		/* fcmp/gt Rm,Rn */
                    gen_helper_fcmp_gt_FT(cpu_sr_t, cpu_env,
                                          FREG(B11_8), FREG(B7_4));
                    return;
                }
	    }
	}
	return;
    case 0xf00e: /* fmac FR0,RM,Rn */
        CHECK_FPU_ENABLED
        CHECK_FPSCR_PR_0
        gen_helper_fmac_FT(FREG(B11_8), cpu_env,
                           FREG(0), FREG(B7_4), FREG(B11_8));
        return;
    }

    switch (ctx->opcode & 0xff00) {
    case 0xc900:		/* and #imm,R0 */
	tcg_gen_andi_i32(REG(0), REG(0), B7_0);
	return;
    case 0xcd00:		/* and.b #imm,@(R0,GBR) */
	{
	    TCGv addr, val;
	    addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(0), cpu_gbr);
	    val = tcg_temp_new();
            tcg_gen_qemu_ld_i32(val, addr, ctx->memidx, MO_UB);
	    tcg_gen_andi_i32(val, val, B7_0);
            tcg_gen_qemu_st_i32(val, addr, ctx->memidx, MO_UB);
	    tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8b00:		/* bf label */
	CHECK_NOT_DELAY_SLOT
        gen_conditional_jump(ctx, ctx->base.pc_next + 4 + B7_0s * 2, false);
	return;
    case 0x8f00:		/* bf/s label */
	CHECK_NOT_DELAY_SLOT
        tcg_gen_xori_i32(cpu_delayed_cond, cpu_sr_t, 1);
        ctx->delayed_pc = ctx->base.pc_next + 4 + B7_0s * 2;
        ctx->envflags |= DELAY_SLOT_CONDITIONAL;
	return;
    case 0x8900:		/* bt label */
	CHECK_NOT_DELAY_SLOT
        gen_conditional_jump(ctx, ctx->base.pc_next + 4 + B7_0s * 2, true);
	return;
    case 0x8d00:		/* bt/s label */
	CHECK_NOT_DELAY_SLOT
        tcg_gen_mov_i32(cpu_delayed_cond, cpu_sr_t);
        ctx->delayed_pc = ctx->base.pc_next + 4 + B7_0s * 2;
        ctx->envflags |= DELAY_SLOT_CONDITIONAL;
	return;
    case 0x8800:		/* cmp/eq #imm,R0 */
        tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_sr_t, REG(0), B7_0s);
	return;
    case 0xc400:		/* mov.b @(disp,GBR),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0);
            tcg_gen_qemu_ld_i32(REG(0), addr, ctx->memidx, MO_SB);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc500:		/* mov.w @(disp,GBR),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 2);
            tcg_gen_qemu_ld_i32(REG(0), addr, ctx->memidx, MO_TESW);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc600:		/* mov.l @(disp,GBR),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 4);
            tcg_gen_qemu_ld_i32(REG(0), addr, ctx->memidx, MO_TESL);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc000:		/* mov.b R0,@(disp,GBR) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0);
            tcg_gen_qemu_st_i32(REG(0), addr, ctx->memidx, MO_UB);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc100:		/* mov.w R0,@(disp,GBR) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 2);
            tcg_gen_qemu_st_i32(REG(0), addr, ctx->memidx, MO_TEUW);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc200:		/* mov.l R0,@(disp,GBR) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 4);
            tcg_gen_qemu_st_i32(REG(0), addr, ctx->memidx, MO_TEUL);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8000:		/* mov.b R0,@(disp,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0);
            tcg_gen_qemu_st_i32(REG(0), addr, ctx->memidx, MO_UB);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8100:		/* mov.w R0,@(disp,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0 * 2);
            tcg_gen_qemu_st_i32(REG(0), addr, ctx->memidx, MO_TEUW);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8400:		/* mov.b @(disp,Rn),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0);
            tcg_gen_qemu_ld_i32(REG(0), addr, ctx->memidx, MO_SB);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8500:		/* mov.w @(disp,Rn),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0 * 2);
            tcg_gen_qemu_ld_i32(REG(0), addr, ctx->memidx, MO_TESW);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc700:		/* mova @(disp,PC),R0 */
        tcg_gen_movi_i32(REG(0), ((ctx->base.pc_next & 0xfffffffc) +
                                  4 + B7_0 * 4) & ~3);
	return;
    case 0xcb00:		/* or #imm,R0 */
	tcg_gen_ori_i32(REG(0), REG(0), B7_0);
	return;
    case 0xcf00:		/* or.b #imm,@(R0,GBR) */
	{
	    TCGv addr, val;
	    addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(0), cpu_gbr);
	    val = tcg_temp_new();
            tcg_gen_qemu_ld_i32(val, addr, ctx->memidx, MO_UB);
	    tcg_gen_ori_i32(val, val, B7_0);
            tcg_gen_qemu_st_i32(val, addr, ctx->memidx, MO_UB);
	    tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc300:		/* trapa #imm */
	{
	    TCGv imm;
	    CHECK_NOT_DELAY_SLOT
            gen_save_cpu_state(ctx, true);
	    imm = tcg_const_i32(B7_0);
            gen_helper_trapa(cpu_env, imm);
	    tcg_temp_free(imm);
            ctx->base.is_jmp = DISAS_NORETURN;
	}
	return;
    case 0xc800:		/* tst #imm,R0 */
	{
	    TCGv val = tcg_temp_new();
	    tcg_gen_andi_i32(val, REG(0), B7_0);
            tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_sr_t, val, 0);
	    tcg_temp_free(val);
	}
	return;
    case 0xcc00:		/* tst.b #imm,@(R0,GBR) */
	{
	    TCGv val = tcg_temp_new();
	    tcg_gen_add_i32(val, REG(0), cpu_gbr);
            tcg_gen_qemu_ld_i32(val, val, ctx->memidx, MO_UB);
	    tcg_gen_andi_i32(val, val, B7_0);
            tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_sr_t, val, 0);
	    tcg_temp_free(val);
	}
	return;
    case 0xca00:		/* xor #imm,R0 */
	tcg_gen_xori_i32(REG(0), REG(0), B7_0);
	return;
    case 0xce00:		/* xor.b #imm,@(R0,GBR) */
	{
	    TCGv addr, val;
	    addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(0), cpu_gbr);
	    val = tcg_temp_new();
            tcg_gen_qemu_ld_i32(val, addr, ctx->memidx, MO_UB);
	    tcg_gen_xori_i32(val, val, B7_0);
            tcg_gen_qemu_st_i32(val, addr, ctx->memidx, MO_UB);
	    tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
    }

    switch (ctx->opcode & 0xf08f) {
    case 0x408e:		/* ldc Rm,Rn_BANK */
	CHECK_PRIVILEGED
	tcg_gen_mov_i32(ALTREG(B6_4), REG(B11_8));
	return;
    case 0x4087:		/* ldc.l @Rm+,Rn_BANK */
	CHECK_PRIVILEGED
        tcg_gen_qemu_ld_i32(ALTREG(B6_4), REG(B11_8), ctx->memidx, MO_TESL);
	tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
	return;
    case 0x0082:		/* stc Rm_BANK,Rn */
	CHECK_PRIVILEGED
	tcg_gen_mov_i32(REG(B11_8), ALTREG(B6_4));
	return;
    case 0x4083:		/* stc.l Rm_BANK,@-Rn */
	CHECK_PRIVILEGED
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
            tcg_gen_qemu_st_i32(ALTREG(B6_4), addr, ctx->memidx, MO_TEUL);
	    tcg_gen_mov_i32(REG(B11_8), addr);
	    tcg_temp_free(addr);
	}
	return;
    }

    switch (ctx->opcode & 0xf0ff) {
    case 0x0023:		/* braf Rn */
	CHECK_NOT_DELAY_SLOT
        tcg_gen_addi_i32(cpu_delayed_pc, REG(B11_8), ctx->base.pc_next + 4);
        ctx->envflags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x0003:		/* bsrf Rn */
	CHECK_NOT_DELAY_SLOT
        tcg_gen_movi_i32(cpu_pr, ctx->base.pc_next + 4);
	tcg_gen_add_i32(cpu_delayed_pc, REG(B11_8), cpu_pr);
        ctx->envflags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x4015:		/* cmp/pl Rn */
        tcg_gen_setcondi_i32(TCG_COND_GT, cpu_sr_t, REG(B11_8), 0);
	return;
    case 0x4011:		/* cmp/pz Rn */
        tcg_gen_setcondi_i32(TCG_COND_GE, cpu_sr_t, REG(B11_8), 0);
	return;
    case 0x4010:		/* dt Rn */
	tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 1);
        tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_sr_t, REG(B11_8), 0);
	return;
    case 0x402b:		/* jmp @Rn */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_mov_i32(cpu_delayed_pc, REG(B11_8));
        ctx->envflags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x400b:		/* jsr @Rn */
	CHECK_NOT_DELAY_SLOT
        tcg_gen_movi_i32(cpu_pr, ctx->base.pc_next + 4);
	tcg_gen_mov_i32(cpu_delayed_pc, REG(B11_8));
        ctx->envflags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x400e:		/* ldc Rm,SR */
	CHECK_PRIVILEGED
        {
            TCGv val = tcg_temp_new();
            tcg_gen_andi_i32(val, REG(B11_8), 0x700083f3);
            gen_write_sr(val);
            tcg_temp_free(val);
            ctx->base.is_jmp = DISAS_STOP;
        }
	return;
    case 0x4007:		/* ldc.l @Rm+,SR */
	CHECK_PRIVILEGED
	{
	    TCGv val = tcg_temp_new();
            tcg_gen_qemu_ld_i32(val, REG(B11_8), ctx->memidx, MO_TESL);
            tcg_gen_andi_i32(val, val, 0x700083f3);
            gen_write_sr(val);
	    tcg_temp_free(val);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
            ctx->base.is_jmp = DISAS_STOP;
	}
	return;
    case 0x0002:		/* stc SR,Rn */
	CHECK_PRIVILEGED
        gen_read_sr(REG(B11_8));
	return;
    case 0x4003:		/* stc SR,@-Rn */
	CHECK_PRIVILEGED
	{
	    TCGv addr = tcg_temp_new();
            TCGv val = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
            gen_read_sr(val);
            tcg_gen_qemu_st_i32(val, addr, ctx->memidx, MO_TEUL);
	    tcg_gen_mov_i32(REG(B11_8), addr);
            tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
#define LD(reg,ldnum,ldpnum,prechk)		\
  case ldnum:							\
    prechk    							\
    tcg_gen_mov_i32 (cpu_##reg, REG(B11_8));			\
    return;							\
  case ldpnum:							\
    prechk    							\
    tcg_gen_qemu_ld_i32(cpu_##reg, REG(B11_8), ctx->memidx, MO_TESL); \
    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);		\
    return;
#define ST(reg,stnum,stpnum,prechk)		\
  case stnum:							\
    prechk    							\
    tcg_gen_mov_i32 (REG(B11_8), cpu_##reg);			\
    return;							\
  case stpnum:							\
    prechk    							\
    {								\
	TCGv addr = tcg_temp_new();				\
	tcg_gen_subi_i32(addr, REG(B11_8), 4);			\
        tcg_gen_qemu_st_i32(cpu_##reg, addr, ctx->memidx, MO_TEUL); \
	tcg_gen_mov_i32(REG(B11_8), addr);			\
	tcg_temp_free(addr);					\
    }								\
    return;
#define LDST(reg,ldnum,ldpnum,stnum,stpnum,prechk)		\
	LD(reg,ldnum,ldpnum,prechk)				\
	ST(reg,stnum,stpnum,prechk)
	LDST(gbr,  0x401e, 0x4017, 0x0012, 0x4013, {})
	LDST(vbr,  0x402e, 0x4027, 0x0022, 0x4023, CHECK_PRIVILEGED)
	LDST(ssr,  0x403e, 0x4037, 0x0032, 0x4033, CHECK_PRIVILEGED)
	LDST(spc,  0x404e, 0x4047, 0x0042, 0x4043, CHECK_PRIVILEGED)
	ST(sgr,  0x003a, 0x4032, CHECK_PRIVILEGED)
        LD(sgr,  0x403a, 0x4036, CHECK_PRIVILEGED CHECK_SH4A)
	LDST(dbr,  0x40fa, 0x40f6, 0x00fa, 0x40f2, CHECK_PRIVILEGED)
	LDST(mach, 0x400a, 0x4006, 0x000a, 0x4002, {})
	LDST(macl, 0x401a, 0x4016, 0x001a, 0x4012, {})
	LDST(pr,   0x402a, 0x4026, 0x002a, 0x4022, {})
	LDST(fpul, 0x405a, 0x4056, 0x005a, 0x4052, {CHECK_FPU_ENABLED})
    case 0x406a:		/* lds Rm,FPSCR */
	CHECK_FPU_ENABLED
        gen_helper_ld_fpscr(cpu_env, REG(B11_8));
        ctx->base.is_jmp = DISAS_STOP;
	return;
    case 0x4066:		/* lds.l @Rm+,FPSCR */
	CHECK_FPU_ENABLED
	{
	    TCGv addr = tcg_temp_new();
            tcg_gen_qemu_ld_i32(addr, REG(B11_8), ctx->memidx, MO_TESL);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
            gen_helper_ld_fpscr(cpu_env, addr);
	    tcg_temp_free(addr);
            ctx->base.is_jmp = DISAS_STOP;
	}
	return;
    case 0x006a:		/* sts FPSCR,Rn */
	CHECK_FPU_ENABLED
	tcg_gen_andi_i32(REG(B11_8), cpu_fpscr, 0x003fffff);
	return;
    case 0x4062:		/* sts FPSCR,@-Rn */
	CHECK_FPU_ENABLED
	{
	    TCGv addr, val;
	    val = tcg_temp_new();
	    tcg_gen_andi_i32(val, cpu_fpscr, 0x003fffff);
	    addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
            tcg_gen_qemu_st_i32(val, addr, ctx->memidx, MO_TEUL);
	    tcg_gen_mov_i32(REG(B11_8), addr);
	    tcg_temp_free(addr);
	    tcg_temp_free(val);
	}
	return;
    case 0x00c3:		/* movca.l R0,@Rm */
        {
            TCGv val = tcg_temp_new();
            tcg_gen_qemu_ld_i32(val, REG(B11_8), ctx->memidx, MO_TEUL);
            gen_helper_movcal(cpu_env, REG(B11_8), val);
            tcg_gen_qemu_st_i32(REG(0), REG(B11_8), ctx->memidx, MO_TEUL);
            tcg_temp_free(val);
        }
        ctx->has_movcal = 1;
	return;
    case 0x40a9:                /* movua.l @Rm,R0 */
        CHECK_SH4A
        /* Load non-boundary-aligned data */
        tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx,
                            MO_TEUL | MO_UNALN);
        return;
        break;
    case 0x40e9:                /* movua.l @Rm+,R0 */
        CHECK_SH4A
        /* Load non-boundary-aligned data */
        tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx,
                            MO_TEUL | MO_UNALN);
        tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
        return;
        break;
    case 0x0029:		/* movt Rn */
        tcg_gen_mov_i32(REG(B11_8), cpu_sr_t);
	return;
    case 0x0073:
        /* MOVCO.L
         *     LDST -> T
         *     If (T == 1) R0 -> (Rn)
         *     0 -> LDST
         *
         * The above description doesn't work in a parallel context.
         * Since we currently support no smp boards, this implies user-mode.
         * But we can still support the official mechanism while user-mode
         * is single-threaded.  */
        CHECK_SH4A
        {
            TCGLabel *fail = gen_new_label();
            TCGLabel *done = gen_new_label();

            if ((tb_cflags(ctx->base.tb) & CF_PARALLEL)) {
                TCGv tmp;

                tcg_gen_brcond_i32(TCG_COND_NE, REG(B11_8),
                                   cpu_lock_addr, fail);
                tmp = tcg_temp_new();
                tcg_gen_atomic_cmpxchg_i32(tmp, REG(B11_8), cpu_lock_value,
                                           REG(0), ctx->memidx, MO_TEUL);
                tcg_gen_setcond_i32(TCG_COND_EQ, cpu_sr_t, tmp, cpu_lock_value);
                tcg_temp_free(tmp);
            } else {
                tcg_gen_brcondi_i32(TCG_COND_EQ, cpu_lock_addr, -1, fail);
                tcg_gen_qemu_st_i32(REG(0), REG(B11_8), ctx->memidx, MO_TEUL);
                tcg_gen_movi_i32(cpu_sr_t, 1);
            }
            tcg_gen_br(done);

            gen_set_label(fail);
            tcg_gen_movi_i32(cpu_sr_t, 0);

            gen_set_label(done);
            tcg_gen_movi_i32(cpu_lock_addr, -1);
        }
        return;
    case 0x0063:
        /* MOVLI.L @Rm,R0
         *     1 -> LDST
         *     (Rm) -> R0
         *     When interrupt/exception
         *     occurred 0 -> LDST
         *
         * In a parallel context, we must also save the loaded value
         * for use with the cmpxchg that we'll use with movco.l.  */
        CHECK_SH4A
        if ((tb_cflags(ctx->base.tb) & CF_PARALLEL)) {
            TCGv tmp = tcg_temp_new();
            tcg_gen_mov_i32(tmp, REG(B11_8));
            tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx, MO_TESL);
            tcg_gen_mov_i32(cpu_lock_value, REG(0));
            tcg_gen_mov_i32(cpu_lock_addr, tmp);
            tcg_temp_free(tmp);
        } else {
            tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx, MO_TESL);
            tcg_gen_movi_i32(cpu_lock_addr, 0);
        }
        return;
    case 0x0093:		/* ocbi @Rn */
	{
            gen_helper_ocbi(cpu_env, REG(B11_8));
	}
	return;
    case 0x00a3:		/* ocbp @Rn */
    case 0x00b3:		/* ocbwb @Rn */
        /* These instructions are supposed to do nothing in case of
           a cache miss. Given that we only partially emulate caches
           it is safe to simply ignore them. */
	return;
    case 0x0083:		/* pref @Rn */
	return;
    case 0x00d3:		/* prefi @Rn */
        CHECK_SH4A
        return;
    case 0x00e3:		/* icbi @Rn */
        CHECK_SH4A
        return;
    case 0x00ab:		/* synco */
        CHECK_SH4A
        tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
        return;
        break;
    case 0x4024:		/* rotcl Rn */
	{
	    TCGv tmp = tcg_temp_new();
            tcg_gen_mov_i32(tmp, cpu_sr_t);
            tcg_gen_shri_i32(cpu_sr_t, REG(B11_8), 31);
	    tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 1);
            tcg_gen_or_i32(REG(B11_8), REG(B11_8), tmp);
	    tcg_temp_free(tmp);
	}
	return;
    case 0x4025:		/* rotcr Rn */
	{
	    TCGv tmp = tcg_temp_new();
            tcg_gen_shli_i32(tmp, cpu_sr_t, 31);
            tcg_gen_andi_i32(cpu_sr_t, REG(B11_8), 1);
	    tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 1);
            tcg_gen_or_i32(REG(B11_8), REG(B11_8), tmp);
	    tcg_temp_free(tmp);
	}
	return;
    case 0x4004:		/* rotl Rn */
	tcg_gen_rotli_i32(REG(B11_8), REG(B11_8), 1);
        tcg_gen_andi_i32(cpu_sr_t, REG(B11_8), 0);
	return;
    case 0x4005:		/* rotr Rn */
        tcg_gen_andi_i32(cpu_sr_t, REG(B11_8), 0);
	tcg_gen_rotri_i32(REG(B11_8), REG(B11_8), 1);
	return;
    case 0x4000:		/* shll Rn */
    case 0x4020:		/* shal Rn */
        tcg_gen_shri_i32(cpu_sr_t, REG(B11_8), 31);
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 1);
	return;
    case 0x4021:		/* shar Rn */
        tcg_gen_andi_i32(cpu_sr_t, REG(B11_8), 1);
	tcg_gen_sari_i32(REG(B11_8), REG(B11_8), 1);
	return;
    case 0x4001:		/* shlr Rn */
        tcg_gen_andi_i32(cpu_sr_t, REG(B11_8), 1);
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 1);
	return;
    case 0x4008:		/* shll2 Rn */
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 2);
	return;
    case 0x4018:		/* shll8 Rn */
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 8);
	return;
    case 0x4028:		/* shll16 Rn */
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 16);
	return;
    case 0x4009:		/* shlr2 Rn */
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 2);
	return;
    case 0x4019:		/* shlr8 Rn */
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 8);
	return;
    case 0x4029:		/* shlr16 Rn */
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 16);
	return;
    case 0x401b:		/* tas.b @Rn */
        {
            TCGv val = tcg_const_i32(0x80);
            tcg_gen_atomic_fetch_or_i32(val, REG(B11_8), val,
                                        ctx->memidx, MO_UB);
            tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_sr_t, val, 0);
            tcg_temp_free(val);
        }
        return;
    case 0xf00d: /* fsts FPUL,FRn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        tcg_gen_mov_i32(FREG(B11_8), cpu_fpul);
	return;
    case 0xf01d: /* flds FRm,FPUL - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        tcg_gen_mov_i32(cpu_fpul, FREG(B11_8));
	return;
    case 0xf02d: /* float FPUL,FRn/DRn - FPSCR: R[PR,Enable.I]/W[Cause,Flag] */
	CHECK_FPU_ENABLED
        if (ctx->tbflags & FPSCR_PR) {
	    TCGv_i64 fp;
            if (ctx->opcode & 0x0100) {
                goto do_illegal;
            }
	    fp = tcg_temp_new_i64();
            gen_helper_float_DT(fp, cpu_env, cpu_fpul);
            gen_store_fpr64(ctx, fp, B11_8);
	    tcg_temp_free_i64(fp);
	}
	else {
            gen_helper_float_FT(FREG(B11_8), cpu_env, cpu_fpul);
	}
	return;
    case 0xf03d: /* ftrc FRm/DRm,FPUL - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
	CHECK_FPU_ENABLED
        if (ctx->tbflags & FPSCR_PR) {
	    TCGv_i64 fp;
            if (ctx->opcode & 0x0100) {
                goto do_illegal;
            }
	    fp = tcg_temp_new_i64();
            gen_load_fpr64(ctx, fp, B11_8);
            gen_helper_ftrc_DT(cpu_fpul, cpu_env, fp);
	    tcg_temp_free_i64(fp);
	}
	else {
            gen_helper_ftrc_FT(cpu_fpul, cpu_env, FREG(B11_8));
	}
	return;
    case 0xf04d: /* fneg FRn/DRn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
        tcg_gen_xori_i32(FREG(B11_8), FREG(B11_8), 0x80000000);
	return;
    case 0xf05d: /* fabs FRn/DRn - FPCSR: Nothing */
	CHECK_FPU_ENABLED
        tcg_gen_andi_i32(FREG(B11_8), FREG(B11_8), 0x7fffffff);
	return;
    case 0xf06d: /* fsqrt FRn */
	CHECK_FPU_ENABLED
        if (ctx->tbflags & FPSCR_PR) {
            if (ctx->opcode & 0x0100) {
                goto do_illegal;
            }
	    TCGv_i64 fp = tcg_temp_new_i64();
            gen_load_fpr64(ctx, fp, B11_8);
            gen_helper_fsqrt_DT(fp, cpu_env, fp);
            gen_store_fpr64(ctx, fp, B11_8);
	    tcg_temp_free_i64(fp);
	} else {
            gen_helper_fsqrt_FT(FREG(B11_8), cpu_env, FREG(B11_8));
	}
	return;
    case 0xf07d: /* fsrra FRn */
	CHECK_FPU_ENABLED
        CHECK_FPSCR_PR_0
        gen_helper_fsrra_FT(FREG(B11_8), cpu_env, FREG(B11_8));
	break;
    case 0xf08d: /* fldi0 FRn - FPSCR: R[PR] */
	CHECK_FPU_ENABLED
        CHECK_FPSCR_PR_0
        tcg_gen_movi_i32(FREG(B11_8), 0);
        return;
    case 0xf09d: /* fldi1 FRn - FPSCR: R[PR] */
	CHECK_FPU_ENABLED
        CHECK_FPSCR_PR_0
        tcg_gen_movi_i32(FREG(B11_8), 0x3f800000);
        return;
    case 0xf0ad: /* fcnvsd FPUL,DRn */
	CHECK_FPU_ENABLED
	{
	    TCGv_i64 fp = tcg_temp_new_i64();
            gen_helper_fcnvsd_FT_DT(fp, cpu_env, cpu_fpul);
            gen_store_fpr64(ctx, fp, B11_8);
	    tcg_temp_free_i64(fp);
	}
	return;
    case 0xf0bd: /* fcnvds DRn,FPUL */
	CHECK_FPU_ENABLED
	{
	    TCGv_i64 fp = tcg_temp_new_i64();
            gen_load_fpr64(ctx, fp, B11_8);
            gen_helper_fcnvds_DT_FT(cpu_fpul, cpu_env, fp);
	    tcg_temp_free_i64(fp);
	}
	return;
    case 0xf0ed: /* fipr FVm,FVn */
        CHECK_FPU_ENABLED
        CHECK_FPSCR_PR_1
        {
            TCGv m = tcg_const_i32((ctx->opcode >> 8) & 3);
            TCGv n = tcg_const_i32((ctx->opcode >> 10) & 3);
            gen_helper_fipr(cpu_env, m, n);
            tcg_temp_free(m);
            tcg_temp_free(n);
            return;
        }
        break;
    case 0xf0fd: /* ftrv XMTRX,FVn */
        CHECK_FPU_ENABLED
        CHECK_FPSCR_PR_1
        {
            if ((ctx->opcode & 0x0300) != 0x0100) {
                goto do_illegal;
            }
            TCGv n = tcg_const_i32((ctx->opcode >> 10) & 3);
            gen_helper_ftrv(cpu_env, n);
            tcg_temp_free(n);
            return;
        }
        break;
    }
#if 0
    fprintf(stderr, "unknown instruction 0x%04x at pc 0x%08x\n",
            ctx->opcode, ctx->base.pc_next);
    fflush(stderr);
#endif
 do_illegal:
    if (ctx->envflags & DELAY_SLOT_MASK) {
 do_illegal_slot:
        gen_save_cpu_state(ctx, true);
        gen_helper_raise_slot_illegal_instruction(cpu_env);
    } else {
        gen_save_cpu_state(ctx, true);
        gen_helper_raise_illegal_instruction(cpu_env);
    }
    ctx->base.is_jmp = DISAS_NORETURN;
    return;

 do_fpu_disabled:
    gen_save_cpu_state(ctx, true);
    if (ctx->envflags & DELAY_SLOT_MASK) {
        gen_helper_raise_slot_fpu_disable(cpu_env);
    } else {
        gen_helper_raise_fpu_disable(cpu_env);
    }
    ctx->base.is_jmp = DISAS_NORETURN;
    return;
}

static void decode_opc(DisasContext * ctx)
{
    uint32_t old_flags = ctx->envflags;

    _decode_opc(ctx);

    if (old_flags & DELAY_SLOT_MASK) {
        /* go out of the delay slot */
        ctx->envflags &= ~DELAY_SLOT_MASK;

        /* When in an exclusive region, we must continue to the end
           for conditional branches.  */
        if (ctx->tbflags & GUSA_EXCLUSIVE
            && old_flags & DELAY_SLOT_CONDITIONAL) {
            gen_delayed_conditional_jump(ctx);
            return;
        }
        /* Otherwise this is probably an invalid gUSA region.
           Drop the GUSA bits so the next TB doesn't see them.  */
        ctx->envflags &= ~GUSA_MASK;

        tcg_gen_movi_i32(cpu_flags, ctx->envflags);
        if (old_flags & DELAY_SLOT_CONDITIONAL) {
	    gen_delayed_conditional_jump(ctx);
        } else {
            gen_jump(ctx);
	}
    }
}

#ifdef CONFIG_USER_ONLY
/* For uniprocessors, SH4 uses optimistic restartable atomic sequences.
   Upon an interrupt, a real kernel would simply notice magic values in
   the registers and reset the PC to the start of the sequence.

   For QEMU, we cannot do this in quite the same way.  Instead, we notice
   the normal start of such a sequence (mov #-x,r15).  While we can handle
   any sequence via cpu_exec_step_atomic, we can recognize the "normal"
   sequences and transform them into atomic operations as seen by the host.
*/
static int decode_gusa(DisasContext *ctx, CPUSH4State *env, int *pmax_insns)
{
    uint16_t insns[5];
    int ld_adr, ld_dst, ld_mop;
    int op_dst, op_src, op_opc;
    int mv_src, mt_dst, st_src, st_mop;
    TCGv op_arg;

    uint32_t pc = ctx->base.pc_next;
    uint32_t pc_end = ctx->base.tb->cs_base;
    int backup = sextract32(ctx->tbflags, GUSA_SHIFT, 8);
    int max_insns = (pc_end - pc) / 2;
    int i;

    if (pc != pc_end + backup || max_insns < 2) {
        /* This is a malformed gUSA region.  Don't do anything special,
           since the interpreter is likely to get confused.  */
        ctx->envflags &= ~GUSA_MASK;
        return 0;
    }

    if (ctx->tbflags & GUSA_EXCLUSIVE) {
        /* Regardless of single-stepping or the end of the page,
           we must complete execution of the gUSA region while
           holding the exclusive lock.  */
        *pmax_insns = max_insns;
        return 0;
    }

    /* The state machine below will consume only a few insns.
       If there are more than that in a region, fail now.  */
    if (max_insns > ARRAY_SIZE(insns)) {
        goto fail;
    }

    /* Read all of the insns for the region.  */
    for (i = 0; i < max_insns; ++i) {
        insns[i] = cpu_lduw_code(env, pc + i * 2);
    }

    ld_adr = ld_dst = ld_mop = -1;
    mv_src = -1;
    op_dst = op_src = op_opc = -1;
    mt_dst = -1;
    st_src = st_mop = -1;
    op_arg = NULL;
    i = 0;

#define NEXT_INSN \
    do { if (i >= max_insns) goto fail; ctx->opcode = insns[i++]; } while (0)

    /*
     * Expect a load to begin the region.
     */
    NEXT_INSN;
    switch (ctx->opcode & 0xf00f) {
    case 0x6000: /* mov.b @Rm,Rn */
        ld_mop = MO_SB;
        break;
    case 0x6001: /* mov.w @Rm,Rn */
        ld_mop = MO_TESW;
        break;
    case 0x6002: /* mov.l @Rm,Rn */
        ld_mop = MO_TESL;
        break;
    default:
        goto fail;
    }
    ld_adr = B7_4;
    ld_dst = B11_8;
    if (ld_adr == ld_dst) {
        goto fail;
    }
    /* Unless we see a mov, any two-operand operation must use ld_dst.  */
    op_dst = ld_dst;

    /*
     * Expect an optional register move.
     */
    NEXT_INSN;
    switch (ctx->opcode & 0xf00f) {
    case 0x6003: /* mov Rm,Rn */
        /* Here we want to recognize ld_dst being saved for later consumtion,
           or for another input register being copied so that ld_dst need not
           be clobbered during the operation.  */
        op_dst = B11_8;
        mv_src = B7_4;
        if (op_dst == ld_dst) {
            /* Overwriting the load output.  */
            goto fail;
        }
        if (mv_src != ld_dst) {
            /* Copying a new input; constrain op_src to match the load.  */
            op_src = ld_dst;
        }
        break;

    default:
        /* Put back and re-examine as operation.  */
        --i;
    }

    /*
     * Expect the operation.
     */
    NEXT_INSN;
    switch (ctx->opcode & 0xf00f) {
    case 0x300c: /* add Rm,Rn */
        op_opc = INDEX_op_add_i32;
        goto do_reg_op;
    case 0x2009: /* and Rm,Rn */
        op_opc = INDEX_op_and_i32;
        goto do_reg_op;
    case 0x200a: /* xor Rm,Rn */
        op_opc = INDEX_op_xor_i32;
        goto do_reg_op;
    case 0x200b: /* or Rm,Rn */
        op_opc = INDEX_op_or_i32;
    do_reg_op:
        /* The operation register should be as expected, and the
           other input cannot depend on the load.  */
        if (op_dst != B11_8) {
            goto fail;
        }
        if (op_src < 0) {
            /* Unconstrainted input.  */
            op_src = B7_4;
        } else if (op_src == B7_4) {
            /* Constrained input matched load.  All operations are
               commutative; "swap" them by "moving" the load output
               to the (implicit) first argument and the move source
               to the (explicit) second argument.  */
            op_src = mv_src;
        } else {
            goto fail;
        }
        op_arg = REG(op_src);
        break;

    case 0x6007: /* not Rm,Rn */
        if (ld_dst != B7_4 || mv_src >= 0) {
            goto fail;
        }
        op_dst = B11_8;
        op_opc = INDEX_op_xor_i32;
        op_arg = tcg_const_i32(-1);
        break;

    case 0x7000 ... 0x700f: /* add #imm,Rn */
        if (op_dst != B11_8 || mv_src >= 0) {
            goto fail;
        }
        op_opc = INDEX_op_add_i32;
        op_arg = tcg_const_i32(B7_0s);
        break;

    case 0x3000: /* cmp/eq Rm,Rn */
        /* Looking for the middle of a compare-and-swap sequence,
           beginning with the compare.  Operands can be either order,
           but with only one overlapping the load.  */
        if ((ld_dst == B11_8) + (ld_dst == B7_4) != 1 || mv_src >= 0) {
            goto fail;
        }
        op_opc = INDEX_op_setcond_i32;  /* placeholder */
        op_src = (ld_dst == B11_8 ? B7_4 : B11_8);
        op_arg = REG(op_src);

        NEXT_INSN;
        switch (ctx->opcode & 0xff00) {
        case 0x8b00: /* bf label */
        case 0x8f00: /* bf/s label */
            if (pc + (i + 1 + B7_0s) * 2 != pc_end) {
                goto fail;
            }
            if ((ctx->opcode & 0xff00) == 0x8b00) { /* bf label */
                break;
            }
            /* We're looking to unconditionally modify Rn with the
               result of the comparison, within the delay slot of
               the branch.  This is used by older gcc.  */
            NEXT_INSN;
            if ((ctx->opcode & 0xf0ff) == 0x0029) { /* movt Rn */
                mt_dst = B11_8;
            } else {
                goto fail;
            }
            break;

        default:
            goto fail;
        }
        break;

    case 0x2008: /* tst Rm,Rn */
        /* Looking for a compare-and-swap against zero.  */
        if (ld_dst != B11_8 || ld_dst != B7_4 || mv_src >= 0) {
            goto fail;
        }
        op_opc = INDEX_op_setcond_i32;
        op_arg = tcg_const_i32(0);

        NEXT_INSN;
        if ((ctx->opcode & 0xff00) != 0x8900 /* bt label */
            || pc + (i + 1 + B7_0s) * 2 != pc_end) {
            goto fail;
        }
        break;

    default:
        /* Put back and re-examine as store.  */
        --i;
    }

    /*
     * Expect the store.
     */
    /* The store must be the last insn.  */
    if (i != max_insns - 1) {
        goto fail;
    }
    NEXT_INSN;
    switch (ctx->opcode & 0xf00f) {
    case 0x2000: /* mov.b Rm,@Rn */
        st_mop = MO_UB;
        break;
    case 0x2001: /* mov.w Rm,@Rn */
        st_mop = MO_UW;
        break;
    case 0x2002: /* mov.l Rm,@Rn */
        st_mop = MO_UL;
        break;
    default:
        goto fail;
    }
    /* The store must match the load.  */
    if (ld_adr != B11_8 || st_mop != (ld_mop & MO_SIZE)) {
        goto fail;
    }
    st_src = B7_4;

#undef NEXT_INSN

    /*
     * Emit the operation.
     */
    tcg_gen_insn_start(pc, ctx->envflags);
    switch (op_opc) {
    case -1:
        /* No operation found.  Look for exchange pattern.  */
        if (st_src == ld_dst || mv_src >= 0) {
            goto fail;
        }
        tcg_gen_atomic_xchg_i32(REG(ld_dst), REG(ld_adr), REG(st_src),
                                ctx->memidx, ld_mop);
        break;

    case INDEX_op_add_i32:
        if (op_dst != st_src) {
            goto fail;
        }
        if (op_dst == ld_dst && st_mop == MO_UL) {
            tcg_gen_atomic_add_fetch_i32(REG(ld_dst), REG(ld_adr),
                                         op_arg, ctx->memidx, ld_mop);
        } else {
            tcg_gen_atomic_fetch_add_i32(REG(ld_dst), REG(ld_adr),
                                         op_arg, ctx->memidx, ld_mop);
            if (op_dst != ld_dst) {
                /* Note that mop sizes < 4 cannot use add_fetch
                   because it won't carry into the higher bits.  */
                tcg_gen_add_i32(REG(op_dst), REG(ld_dst), op_arg);
            }
        }
        break;

    case INDEX_op_and_i32:
        if (op_dst != st_src) {
            goto fail;
        }
        if (op_dst == ld_dst) {
            tcg_gen_atomic_and_fetch_i32(REG(ld_dst), REG(ld_adr),
                                         op_arg, ctx->memidx, ld_mop);
        } else {
            tcg_gen_atomic_fetch_and_i32(REG(ld_dst), REG(ld_adr),
                                         op_arg, ctx->memidx, ld_mop);
            tcg_gen_and_i32(REG(op_dst), REG(ld_dst), op_arg);
        }
        break;

    case INDEX_op_or_i32:
        if (op_dst != st_src) {
            goto fail;
        }
        if (op_dst == ld_dst) {
            tcg_gen_atomic_or_fetch_i32(REG(ld_dst), REG(ld_adr),
                                        op_arg, ctx->memidx, ld_mop);
        } else {
            tcg_gen_atomic_fetch_or_i32(REG(ld_dst), REG(ld_adr),
                                        op_arg, ctx->memidx, ld_mop);
            tcg_gen_or_i32(REG(op_dst), REG(ld_dst), op_arg);
        }
        break;

    case INDEX_op_xor_i32:
        if (op_dst != st_src) {
            goto fail;
        }
        if (op_dst == ld_dst) {
            tcg_gen_atomic_xor_fetch_i32(REG(ld_dst), REG(ld_adr),
                                         op_arg, ctx->memidx, ld_mop);
        } else {
            tcg_gen_atomic_fetch_xor_i32(REG(ld_dst), REG(ld_adr),
                                         op_arg, ctx->memidx, ld_mop);
            tcg_gen_xor_i32(REG(op_dst), REG(ld_dst), op_arg);
        }
        break;

    case INDEX_op_setcond_i32:
        if (st_src == ld_dst) {
            goto fail;
        }
        tcg_gen_atomic_cmpxchg_i32(REG(ld_dst), REG(ld_adr), op_arg,
                                   REG(st_src), ctx->memidx, ld_mop);
        tcg_gen_setcond_i32(TCG_COND_EQ, cpu_sr_t, REG(ld_dst), op_arg);
        if (mt_dst >= 0) {
            tcg_gen_mov_i32(REG(mt_dst), cpu_sr_t);
        }
        break;

    default:
        g_assert_not_reached();
    }

    /* If op_src is not a valid register, then op_arg was a constant.  */
    if (op_src < 0 && op_arg) {
        tcg_temp_free_i32(op_arg);
    }

    /* The entire region has been translated.  */
    ctx->envflags &= ~GUSA_MASK;
    ctx->base.pc_next = pc_end;
    return max_insns;

 fail:
    qemu_log_mask(LOG_UNIMP, "Unrecognized gUSA sequence %08x-%08x\n",
                  pc, pc_end);

    /* Restart with the EXCLUSIVE bit set, within a TB run via
       cpu_exec_step_atomic holding the exclusive lock.  */
    tcg_gen_insn_start(pc, ctx->envflags);
    ctx->envflags |= GUSA_EXCLUSIVE;
    gen_save_cpu_state(ctx, false);
    gen_helper_exclusive(cpu_env);
    ctx->base.is_jmp = DISAS_NORETURN;

    /* We're not executing an instruction, but we must report one for the
       purposes of accounting within the TB.  We might as well report the
       entire region consumed via ctx->base.pc_next so that it's immediately
       available in the disassembly dump.  */
    ctx->base.pc_next = pc_end;
    return 1;
}
#endif

static void sh4_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);
    CPUSH4State *env = cs->env_ptr;
    int bound;

    ctx->tbflags = (uint32_t)ctx->base.tb->flags;
    ctx->envflags = ctx->base.tb->flags & TB_FLAG_ENVFLAGS_MASK;
    ctx->memidx = (ctx->tbflags & (1u << SR_MD)) == 0 ? 1 : 0;
    /* We don't know if the delayed pc came from a dynamic or static branch,
       so assume it is a dynamic branch.  */
    ctx->delayed_pc = -1; /* use delayed pc from env pointer */
    ctx->features = env->features;
    ctx->has_movcal = (ctx->tbflags & TB_FLAG_PENDING_MOVCA);
    ctx->gbank = ((ctx->tbflags & (1 << SR_MD)) &&
                  (ctx->tbflags & (1 << SR_RB))) * 0x10;
    ctx->fbank = ctx->tbflags & FPSCR_FR ? 0x10 : 0;

    /* Since the ISA is fixed-width, we can bound by the number
       of instructions remaining on the page.  */
    bound = -(ctx->base.pc_next | TARGET_PAGE_MASK) / 2;
    ctx->base.max_insns = MIN(ctx->base.max_insns, bound);
}

static void sh4_tr_tb_start(DisasContextBase *dcbase, CPUState *cs)
{
#ifdef CONFIG_USER_ONLY
    DisasContext *ctx = container_of(dcbase, DisasContext, base);
    CPUSH4State *env = cs->env_ptr;

    if (ctx->tbflags & GUSA_MASK) {
        ctx->base.num_insns = decode_gusa(ctx, env, &ctx->base.max_insns);
    }
#endif
}

static void sh4_tr_insn_start(DisasContextBase *dcbase, CPUState *cs)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);

    tcg_gen_insn_start(ctx->base.pc_next, ctx->envflags);
}

static bool sh4_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cs,
                                    const CPUBreakpoint *bp)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);

    /* We have hit a breakpoint - make sure PC is up-to-date */
    gen_save_cpu_state(ctx, true);
    gen_helper_debug(cpu_env);
    ctx->base.is_jmp = DISAS_NORETURN;
    /* The address covered by the breakpoint must be included in
       [tb->pc, tb->pc + tb->size) in order to for it to be
       properly cleared -- thus we increment the PC here so that
       the logic setting tb->size below does the right thing.  */
    ctx->base.pc_next += 2;
    return true;
}

static void sh4_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
{
    CPUSH4State *env = cs->env_ptr;
    DisasContext *ctx = container_of(dcbase, DisasContext, base);

    ctx->opcode = cpu_lduw_code(env, ctx->base.pc_next);
    decode_opc(ctx);
    ctx->base.pc_next += 2;
}

static void sh4_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);

    if (ctx->tbflags & GUSA_EXCLUSIVE) {
        /* Ending the region of exclusivity.  Clear the bits.  */
        ctx->envflags &= ~GUSA_MASK;
    }

    switch (ctx->base.is_jmp) {
    case DISAS_STOP:
        gen_save_cpu_state(ctx, true);
        if (ctx->base.singlestep_enabled) {
            gen_helper_debug(cpu_env);
        } else {
            tcg_gen_exit_tb(0);
        }
        break;
    case DISAS_NEXT:
    case DISAS_TOO_MANY:
        gen_save_cpu_state(ctx, false);
        gen_goto_tb(ctx, 0, ctx->base.pc_next);
        break;
    case DISAS_NORETURN:
        break;
    default:
        g_assert_not_reached();
    }
}

static void sh4_tr_disas_log(const DisasContextBase *dcbase, CPUState *cs)
{
    qemu_log("IN:\n");  /* , lookup_symbol(dcbase->pc_first)); */
    log_target_disas(cs, dcbase->pc_first, dcbase->tb->size);
}

static const TranslatorOps sh4_tr_ops = {
    .init_disas_context = sh4_tr_init_disas_context,
    .tb_start           = sh4_tr_tb_start,
    .insn_start         = sh4_tr_insn_start,
    .breakpoint_check   = sh4_tr_breakpoint_check,
    .translate_insn     = sh4_tr_translate_insn,
    .tb_stop            = sh4_tr_tb_stop,
    .disas_log          = sh4_tr_disas_log,
};

void gen_intermediate_code(CPUState *cs, TranslationBlock *tb)
{
    DisasContext ctx;

    translator_loop(&sh4_tr_ops, &ctx.base, cs, tb);
}

void restore_state_to_opc(CPUSH4State *env, TranslationBlock *tb,
                          target_ulong *data)
{
    env->pc = data[0];
    env->flags = data[1];
    /* Theoretically delayed_pc should also be restored. In practice the
       branch instruction is re-executed after exception, so the delayed
       branch target will be recomputed. */
}