1/* Definitions for decoding the ft32 opcode table. 2 Copyright (C) 2013-2022 Free Software Foundation, Inc. 3 Contributed by FTDI (support@ftdichip.com) 4 5This program is free software; you can redistribute it and/or modify 6it under the terms of the GNU General Public License as published by 7the Free Software Foundation; either version 2 of the License, or 8(at your option) any later version. 9 10This program is distributed in the hope that it will be useful, 11but WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13GNU General Public License for more details. 14 15You should have received a copy of the GNU General Public License 16along with this program; if not, write to the Free Software 17Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 1802110-1301, USA. */ 19 20typedef struct ft32_opc_info_t 21{ 22 const char *name; 23 int dw; 24 unsigned int mask; 25 unsigned int bits; 26 int fields; 27} ft32_opc_info_t; 28 29#define FT32_PAT_ALUOP 0x08 30#define FT32_PAT_LDA 0x18 31#define FT32_PAT_TOCI 0x01 32#define FT32_PAT_CMPOP 0x0b 33#define FT32_PAT_STA 0x17 34#define FT32_PAT_EXA 0x07 35#define FT32_PAT_LDK 0x0c 36#define FT32_PAT_FFUOP 0x1e 37#define FT32_PAT_LDI 0x15 38#define FT32_PAT_STI 0x16 39#define FT32_PAT_EXI 0x1d 40#define FT32_PAT_POP 0x11 41#define FT32_PAT_LPM 0x0d 42#define FT32_PAT_LINK 0x12 43#define FT32_PAT_TOC 0x00 44#define FT32_PAT_PUSH 0x10 45#define FT32_PAT_RETURN 0x14 46#define FT32_PAT_UNLINK 0x13 47#define FT32_PAT_LPMI 0x19 48 49#define FT32_FLD_CBCRCV (1 << 0) 50#define FT32_FLD_INT (1 << 1) 51#define FT32_FLD_INT_BIT 26 52#define FT32_FLD_INT_SIZ 1 53#define FT32_FLD_DW (1 << 2) 54#define FT32_FLD_DW_BIT 25 55#define FT32_FLD_DW_SIZ 2 56#define FT32_FLD_CB (1 << 3) 57#define FT32_FLD_CB_BIT 22 58#define FT32_FLD_CB_SIZ 5 59#define FT32_FLD_R_D (1 << 4) 60#define FT32_FLD_R_D_BIT 20 61#define FT32_FLD_R_D_SIZ 5 62#define FT32_FLD_CR (1 << 5) 63#define FT32_FLD_CR_BIT 20 64#define FT32_FLD_CR_SIZ 2 65#define FT32_FLD_CV (1 << 6) 66#define FT32_FLD_CV_BIT 19 67#define FT32_FLD_CV_SIZ 1 68#define FT32_FLD_BT (1 << 7) 69#define FT32_FLD_BT_BIT 18 70#define FT32_FLD_BT_SIZ 1 71#define FT32_FLD_R_1 (1 << 8) 72#define FT32_FLD_R_1_BIT 15 73#define FT32_FLD_R_1_SIZ 5 74#define FT32_FLD_RIMM (1 << 9) 75#define FT32_FLD_RIMM_BIT 4 76#define FT32_FLD_RIMM_SIZ 11 77#define FT32_FLD_R_2 (1 << 10) 78#define FT32_FLD_R_2_BIT 4 79#define FT32_FLD_R_2_SIZ 5 80#define FT32_FLD_K20 (1 << 11) 81#define FT32_FLD_K20_BIT 0 82#define FT32_FLD_K20_SIZ 20 83#define FT32_FLD_PA (1 << 12) 84#define FT32_FLD_PA_BIT 0 85#define FT32_FLD_PA_SIZ 18 86#define FT32_FLD_AA (1 << 13) 87#define FT32_FLD_AA_BIT 0 88#define FT32_FLD_AA_SIZ 17 89#define FT32_FLD_K16 (1 << 14) 90#define FT32_FLD_K16_BIT 0 91#define FT32_FLD_K16_SIZ 16 92#define FT32_FLD_K15 (1 << 15) 93#define FT32_FLD_K15_BIT 0 94#define FT32_FLD_K15_SIZ 15 95#define FT32_FLD_AL (1 << 16) 96#define FT32_FLD_AL_BIT 0 97#define FT32_FLD_AL_SIZ 4 98 99#define FT32_IS_CALL(inst) (((inst) & 0xfffc0000) == 0x00340000) 100#define FT32_IS_PUSH(inst) (((inst) & 0xfff00000) == 0x84000000) 101#define FT32_PUSH_REG(inst) (((inst) >> 15) & 0x1f) 102#define FT32_IS_LINK(inst) (((inst) & 0xffff0000) == 0x95d00000) 103#define FT32_LINK_SIZE(inst) ((inst) & 0xffff) 104 105#define FT32_FLD_R_D_POST (1 << 17) 106#define FT32_FLD_R_1_POST (1 << 18) 107 108static const unsigned int sc_form_0[] = { 1090x44000000, 0x44000002, 0x44000004, 0x44000005, 0x4400000b, 1100x44000010, 0x44000012, 0x44000014, 0x44000015, 0x44000018, 1110x4400001b, 0x44000020, 0x44000022, 0x44000024, 0x44000025, 1120x4400002b, 0x44000030, 0x44000032, 0x44000034, 0x44000035, 1130x4400003b, 0x44000040, 0x44000042, 0x44000044, 0x44000045, 1140x4400004b, 0x44000050, 0x44000060, 0x44000062, 0x44000065, 1150x44000070, 0x44000072, 0x44000075, 0x44000080, 0x44000082, 1160x44000090, 0x44000092, 0x440000a0, 0x440000a2, 0x440000b0, 1170x440000d0, 0x440000d2, 0x440000d5, 0x440000e0, 0x440000e2, 1180x440000f0, 0x440000f2, 0x440000f5, 0x44000100, 0x44000102, 1190x44000110, 0x44000120, 0x44000122, 0x44000130, 0x44000140, 1200x44000170, 0x44000180, 0x44000190, 0x440001a0, 0x440001b0, 1210x440001e0, 0x440001f0, 0x44004000, 0x44004003, 0x4400400c, 1220x4400400d, 0x44004010, 0x44004011, 0x44004013, 0x44004014, 1230x44004016, 0x44004019, 0x4400401a, 0x44004020, 0x44004021, 1240x44004028, 0x4400402a, 0x44004034, 0x44004038, 0x44004039, 1250x44004040, 0x44004048, 0x44004058, 0x44004064, 0x44004074, 1260x44004080, 0x44004081, 0x44004088, 0x44004089, 0x44004098, 1270x440040c0, 0x440040ca, 0x440040f4, 0x44004100, 0x44004108, 1280x44004109, 0x4400410a, 0x4400410b, 0x44004180, 0x44004182, 1290x440041c0, 0x440041c2, 0x440041f4, 0x44004200, 0x44004202, 1300x4400420b, 0x4400421b, 0x4400422b, 0x44004240, 0x44004242, 1310x4400424b, 0x4400425b, 0x4400426b, 0x4400427b, 0x44004280, 1320x44004282, 0x440042ab, 0x440042bb, 0x440042c0, 0x440042c2, 1330x44004300, 0x44004340, 0x440043c3, 0x4400440b, 0x44004543, 1340x44004553, 0x440047f4, 0x44004800, 0x44004980, 0x44004a0b, 1350x44004a80, 0x44004dc0, 0x44004ff4, 0x44005003, 0x44005353, 1360x4400537b, 0x440053e3, 0x44005700, 0x4400594b, 0x4400620b, 1370x4400621b, 0x4400622b, 0x4400623b, 0x4400624b, 0x4400625b, 1380x4400626b, 0x4400627b, 0x4400628b, 0x4400629b, 0x440062bb, 1390x440062fb, 0x4400633b, 0x4400637b, 0x44006383, 0x44007f00, 1400x44007f80, 0x44007fc0, 0x44007fe0, 0x44007ff0, 0x44007ff3, 0x44007ff6 141}; 142static const unsigned int sc_form_1[] = { 1430x44000002, 0x44008002, 0x44010002, 0x44010008, 0x44018002, 1440x44020002, 0x44030002, 0x44038002 145}; 146static const unsigned int sc_form_2[] = { 1470x59e04002, 0x59e04012, 0x59e04022, 0x59e04032, 0x59e04042, 1480x59e04052, 0x59e04072, 0x59e04082, 0x59e07ff2, 0x5de00002, 1490x5de00012, 0x5de00022, 0x5de00032, 0x5de00042, 0x5de00052, 1500x5de00062, 0x5de00072, 0x5de00082, 0x5de000a2, 0x5de000d2, 1510x5de000e2, 0x5de000f2, 0x5de00102, 0x5de00112, 0x5de00122, 1520x5de00132, 0x5de00172, 0x5de04002, 0x5de04012, 0x5de04022, 1530x5de04032, 0x5de04042, 0x5de04052, 0x5de04062, 0x5de04072, 1540x5de04082, 0x5de04092, 0x5de040f2, 0x5de04102, 0x5de04112, 1550x5de04142, 0x5de04162, 0x5de041b2, 0x5de041f2, 0x5de04202, 1560x5de0420c, 0x5de0421c, 0x5de0422c, 0x5de0423c, 0x5de04242, 1570x5de0424c, 0x5de0425c, 0x5de0426c, 0x5de0427c, 0x5de0428c, 1580x5de0429c, 0x5de042ac, 0x5de042cc, 0x5de042dc, 0x5de042ec, 1590x5de042fc, 0x5de0430c, 0x5de0431c, 0x5de0433c, 0x5de0436c, 1600x5de0437c, 0x5de04382, 0x5de043ac, 0x5de043bc, 0x5de043cc, 1610x5de043dc, 0x5de04ff2, 0x5de07ff2, 0x84000000 162}; 163static const unsigned int sc_form_3[] = { 1640x44000010, 0x44000024, 0x44000025, 0x44000030, 0x44000034, 1650x44004000, 0x4400400c, 0x4400400d, 0x44004010, 0x44004014, 1660x44004028, 0x44004038, 0x44004040, 0x440040ca, 0x44004109, 1670x44004880, 0x44004ac0, 0x44004e00, 0x44004e80, 0x44004ff4, 1680x4400500c, 0x44005200, 0x44005680, 0x44005700, 0x4400620b, 1690x44007f80, 0x44008020, 0x44008024, 0x4400c000, 0x4400c00c, 1700x4400c00d, 0x4400c010, 0x4400c028, 0x4400c038, 0x4400c1f9, 1710x4400cff4, 0x4400d00c, 0x4400d173, 0x4400ff80, 0x4400fff0, 1720x44010030, 0x44014000, 0x4401400c, 0x4401400d, 0x44014010, 1730x44014028, 0x44014074, 0x44014080, 0x440143f3, 0x44014ff4, 1740x4401500c, 0x44015743, 0x44017ff0, 0x44018030, 0x4401c000, 1750x4401c00c, 0x4401c010, 0x4401cff4, 0x4401d00c, 0x44020100, 1760x44024000, 0x44024014, 0x44027f80, 0x4402c000, 0x44030085, 1770x44034000, 0x44034109, 0x4403c000, 0x44044000, 0x44044109, 1780x4404410b, 0x4404c000, 0x440680e0, 0x4406c000, 0x4406c040, 1790x4406c080, 0x4406c0c0, 0x4406c300, 0x4406c3c0, 0x4406c900, 1800x4406cac0, 0x4406cb40, 0x4406cbc0, 0x4406ce80, 0x4406d5c0, 1810x4406d680, 0x4406d700, 0x4406d740, 0x4406d780, 0x4406dfc0, 1820x44074000, 0x44074010, 0x44074e80, 0x4407c000, 0x4407c00d, 1830x4407c074, 0x44084000, 0x4408c000, 0x44094000, 0x4409c000, 1840x440a4000, 0x440ac000, 0x440b4000, 0x440bc000, 0x440c4000, 1850x440c4040, 0x440cc000, 0x440d4000, 0x440dc000, 0x440ef340, 1860x440ef400, 0x440ef440, 0x440ef4c0, 0x440ef540, 0x440ef5c0, 1870x440ef6b0, 0x440ef700, 0x440ef780, 0x440ef8c0, 0x440f420d, 1880x440f421d, 0x440f426d, 0x440fc180, 0x440fc1a0, 0x440fc1b0, 1890x440fc1c0, 0x440fc200, 0x440fc240, 0x440fc280, 0x440fc380, 1900x440fc840, 0x440fc8c0, 0x440fc900, 0x440fc980, 0x440fcd80, 1910x64000000, 0x64000001, 0x64000002, 0x64000003, 0x64000004, 1920x64000005, 0x64000006, 0x64000007, 0x64000008, 0x64000009, 1930x6400000a, 0x6400000b, 0x6400000c, 0x6400000d, 0x6400000e, 1940x6400000f, 0x64000010, 0x64000011, 0x64000012, 0x64000013, 1950x64000014, 0x64000015, 0x64000017, 0x64000018, 0x64000019, 1960x6400001a, 0x6400001d, 0x64000020, 0x64000023, 0x64000024, 1970x64000027, 0x6400002b, 0x6400002c, 0x6400002d, 0x64000030, 1980x64000035, 0x6400003c, 0x64000040, 0x64000048, 0x64000064, 1990x6400006c, 0x64000080, 0x640000ff, 0x64000100, 0x640001b0, 2000x640001b8, 0x64000200, 0x64000218, 0x64000240, 0x6400024c, 2010x64000250, 0x640003e8, 0x64000400, 0x64000409, 0x64000554, 2020x64000600, 0x64000690, 0x64000730, 0x640007ff, 0x64000800, 2030x64000900, 0x64000fff, 0x64001000, 0x6400182c, 0x64001b70, 2040x64001c1c, 0x64001c24, 0x64001fff, 0x64002000, 0x64003598, 2050x640036ec, 0x64003fff, 0x640052c0, 0x640054e4, 0x64005a3c, 2060x64005fa4, 0x64006468, 0x64006718, 0x64008000, 0x6400c000, 2070x6400ffff, 0x64010000, 0x64010008, 0x640102a0, 0x64014515, 2080x64040000, 0x64050000, 0x6407c000, 0x640ff800, 0x640ffc00, 2090x640ffc01, 0x640ffc02, 0x640fffff, 0x8c000000, 0x94000000, 2100x94000018, 0x9400001c, 0x94000020, 0x98000000, 0xa0000000, 2110xa8000000, 0xa8000001, 0xa8000002, 0xa8000003, 0xa8008000, 2120xa8008002, 0xa8010000, 0xa8018000, 0xa8020000, 0xa8068000, 2130xa8068005, 0xa8068006, 0xa8068007, 0xa806800f, 0xa8068040, 2140xa8068043, 0xa8068054, 0xa8070000, 0xa8078000, 0xa8080000, 2150xa8090000, 0xa80b0000, 0xa80f801b, 0xaa000000, 0xaa008000, 2160xaa008002, 0xaa00800c, 0xaa010000, 0xaa068000, 0xaa068002, 2170xaa068004, 0xaa068006, 0xaa068008, 0xaa06800a, 0xaa06800c, 2180xaa068024, 0xaa070000, 0xaa070002, 0xaa07000c, 0xaa078000, 2190xaa078002, 0xac000000, 0xac000004, 0xac000008, 0xac00000c, 2200xac000010, 0xac000014, 0xac000018, 0xac00001c, 0xac000020, 2210xac000024, 0xac000028, 0xac00002c, 0xac000030, 0xac000038, 2220xac00003c, 0xac000040, 0xac000044, 0xac000058, 0xac00006c, 2230xac008000, 0xac008004, 0xac008008, 0xac00800c, 0xac008010, 2240xac008018, 0xac008020, 0xac008024, 0xac008028, 0xac008030, 2250xac008034, 0xac008038, 0xac00803c, 0xac008044, 0xac008070, 2260xac008078, 0xac010000, 0xac010004, 0xac010008, 0xac01000c, 2270xac010010, 0xac01002c, 0xac018000, 0xac018004, 0xac018008, 2280xac020000, 0xac020004, 0xac020008, 0xac028000, 0xac030000, 2290xac038000, 0xac048000, 0xac050000, 0xac068000, 0xac068004, 2300xac068008, 0xac06800c, 0xac068010, 0xac068014, 0xac068018, 2310xac06801c, 0xac068020, 0xac068024, 0xac068028, 0xac06802c, 2320xac068030, 0xac068034, 0xac068038, 0xac06803c, 0xac068040, 2330xac068044, 0xac068048, 0xac06804c, 0xac068050, 0xac068058, 2340xac070000, 0xac070004, 0xac070008, 0xac07000c, 0xac070010, 2350xac070014, 0xac070018, 0xac07001c, 0xac070024, 0xac070028, 2360xac07002c, 0xac070038, 0xac07003c, 0xac070040, 0xac070044, 2370xac070048, 0xac07004c, 0xac070054, 0xac078000, 0xac078004, 2380xac078008, 0xac07800c, 0xac078024, 0xac07803c, 0xac080000, 2390xac080004, 0xac080008, 0xac08003c, 0xac088000, 0xac088004, 2400xac088008, 0xac08800c, 0xac090000, 0xac098000, 0xac0a0000, 2410xac0a0004, 0xac0a8000, 0xac0b0000, 0xac0c0000, 0xac0d8004, 2420xac0d8008, 0xac0e8090, 0xac0e8094, 0xac0e80fc, 0xac0f8018, 2430xac0f801c, 0xac0f8020, 0xac0f8024, 0xac0f8028, 0xac0f802c, 2440xac0f8030, 0xac0f8034, 0xac0f8038, 0xac0f803c, 0xac0f8040, 2450xac0f8044, 0xac0f8048, 0xac0f804c, 0xac0f8050, 0xac0f8054, 2460xac0f8058, 0xb0000000, 0xb0000006, 0xb0000009, 0xb0000018, 2470xb0000019, 0xb000001b, 0xb0008000, 0xb0010000, 0xb0018000, 2480xb0018087, 0xb0020000, 0xb0030000, 0xb0070000, 0xb0078000, 2490xb0080000, 0xb2000000, 0xb2000006, 0xb200000c, 0xb2008000, 2500xb200800c, 0xb2010000, 0xb2018000, 0xb2020000, 0xb2078000, 2510xb4000000, 0xb4000004, 0xb4000008, 0xb400000c, 0xb4000010, 2520xb4000014, 0xb4000018, 0xb400001c, 0xb4000020, 0xb4000024, 2530xb4000028, 0xb400002c, 0xb4000030, 0xb4000034, 0xb4000038, 2540xb400003c, 0xb4000040, 0xb4000044, 0xb4000048, 0xb4000050, 2550xb4000054, 0xb400006c, 0xb4008000, 0xb4008004, 0xb4008008, 2560xb400800c, 0xb4008010, 0xb4008014, 0xb4008018, 0xb400801c, 2570xb4008020, 0xb4008024, 0xb4008028, 0xb400802c, 0xb4008034, 2580xb4008038, 0xb4008040, 0xb4008044, 0xb400806c, 0xb4008070, 2590xb4010000, 0xb4010004, 0xb4010008, 0xb401000c, 0xb4010010, 2600xb4010018, 0xb401001c, 0xb4010020, 0xb4010024, 0xb4010028, 2610xb401002c, 0xb4018000, 0xb4018004, 0xb4018008, 0xb4018018, 2620xb401801c, 0xb4020000, 0xb4020004, 0xb4020008, 0xb402000c, 2630xb4020018, 0xb4028000, 0xb4028018, 0xb4030000, 0xb4030008, 2640xb4030018, 0xb4038000, 0xb4068000, 0xb4068004, 0xb4068008, 2650xb406800c, 0xb4068018, 0xb406801c, 0xb4068020, 0xb4068024, 2660xb4068028, 0xb4070000, 0xb4070004, 0xb4070008, 0xb4070010, 2670xb4070018, 0xb4070024, 0xb4070028, 0xb4078000, 0xb4078024, 2680xb4080000, 0xb4080004, 0xb4090000, 0xb4098000, 0xb40c8000 269}; 270 271#define N_SC_FORM0 (sizeof (sc_form_0) / sizeof (unsigned int)) 272#define N_SC_FORM1 (sizeof (sc_form_1) / sizeof (unsigned int)) 273#define N_SC_FORM2 (sizeof (sc_form_2) / sizeof (unsigned int)) 274#define N_SC_FORM3 (sizeof (sc_form_3) / sizeof (unsigned int)) 275 276static int 277sc_compar (const void *va, const void *vb) 278{ 279 const unsigned int *a = (unsigned int *) va; 280 const unsigned int *b = (unsigned int *) vb; 281 return (*a - *b); 282} 283 284static int ATTRIBUTE_UNUSED 285ft32_shortcode (unsigned int op32, unsigned int *sc) 286{ 287 unsigned int Rd_mask = 31 << 20; 288 unsigned int R1_mask = 31 << 15; 289 unsigned int R2_mask = 2047 << 4; 290 unsigned int Rd = (op32 >> 20) & 31; 291 unsigned int R1 = (op32 >> 15) & 31; 292 unsigned int R2 = (op32 >> 4) & 2047; 293 unsigned int lookup; 294 unsigned int *find = NULL; 295 unsigned int code = 0, r = 0; 296 297 /* Form 0 */ 298 if (Rd == R1) 299 { 300 lookup = op32 & ~Rd_mask & ~R1_mask; 301 find = (unsigned int *) bsearch (&lookup, sc_form_0, N_SC_FORM0, 302 sizeof (unsigned int), sc_compar); 303 code = find - sc_form_0; 304 r = Rd; 305 } 306 307 /* Form 1 */ 308 if ((find == NULL) && (Rd == R2)) 309 { 310 lookup = op32 & ~Rd_mask & ~R2_mask; 311 find = (unsigned int *) bsearch (&lookup, sc_form_1, N_SC_FORM1, 312 sizeof (unsigned int), sc_compar); 313 code = find - sc_form_1 + N_SC_FORM0; 314 r = Rd; 315 } 316 317 /* Form 2 */ 318 if (find == NULL) 319 { 320 lookup = op32 & ~R1_mask; 321 find = (unsigned int *) bsearch (&lookup, sc_form_2, N_SC_FORM2, 322 sizeof (unsigned int), sc_compar); 323 code = find - sc_form_2 + (N_SC_FORM0 + N_SC_FORM1); 324 r = R1; 325 } 326 327 /* Form 3 */ 328 if (find == NULL) 329 { 330 lookup = op32 & ~Rd_mask; 331 find = (unsigned int *) bsearch (&lookup, sc_form_3, N_SC_FORM3, 332 sizeof (unsigned int), sc_compar); 333 code = find - sc_form_3 + (N_SC_FORM0 + N_SC_FORM1 + N_SC_FORM2); 334 r = Rd; 335 } 336 337 *sc = (code << 5) | r; 338 339 return (find != NULL); 340} 341 342static int ATTRIBUTE_UNUSED 343ft32_split_shortcode (unsigned int op32, unsigned int code15[2]) 344{ 345 int code3; 346 unsigned int code30; 347 348 switch (op32 >> 27) 349 { 350 case 2: 351 code3 = 0; 352 break; 353 case 3: 354 code3 = 1; 355 break; 356 case 4: 357 code3 = 2; 358 break; 359 case 5: 360 code3 = 3; 361 break; 362 case 6: 363 code3 = 4; 364 break; 365 case 9: 366 code3 = 5; 367 break; 368 case 10: 369 code3 = 6; 370 break; 371 case 14: 372 code3 = 7; 373 break; 374 default: 375 code3 = -1; 376 break; 377 } 378 379 if (code3 == -1) 380 { 381 code15[0] = 0; 382 code15[1] = 0; 383 return 0; 384 } 385 else 386 { 387 code30 = ((op32 & 0x07ffffff) << 3) | code3; 388 code15[0] = code30 & 0x7fff; 389 code15[1] = (code30 >> 15) & 0x7fff; 390 return 1; 391 } 392} 393 394static unsigned int ATTRIBUTE_UNUSED 395ft32_merge_shortcode (unsigned int code15[2]) 396{ 397 static const unsigned char pat3[] = { 2, 3, 4, 5, 6, 9, 10, 14 }; 398 399 unsigned int code30 = (code15[1] << 15) | code15[0]; 400 unsigned int code27 = code30 >> 3; 401 unsigned int code3 = code30 & 7; 402 unsigned int pattern = pat3[code3]; 403 return (pattern << 27) | code27; 404} 405 406static int ATTRIBUTE_UNUSED 407ft32_decode_shortcode (unsigned int pc, unsigned int op32, unsigned int *sc) 408{ 409 int code3; 410 unsigned int code30; 411 unsigned int code15[2]; 412 size_t i; 413 414 switch (op32 >> 27) 415 { 416 case 2: 417 code3 = 0; 418 break; 419 case 3: 420 code3 = 1; 421 break; 422 case 4: 423 code3 = 2; 424 break; 425 case 5: 426 code3 = 3; 427 break; 428 case 6: 429 code3 = 4; 430 break; 431 case 9: 432 code3 = 5; 433 break; 434 case 10: 435 code3 = 6; 436 break; 437 case 14: 438 code3 = 7; 439 break; 440 default: 441 code3 = -1; 442 break; 443 } 444 445 if (code3 == -1) 446 return 0; 447 else 448 { 449 code30 = ((op32 & 0x07ffffff) << 3) | code3; 450 code15[0] = code30 & 0x7fff; 451 code15[1] = (code30 >> 15) & 0x7fff; 452 for (i = 0; i < 2; i++) 453 { 454 unsigned int code = code15[i] >> 5; 455 unsigned int r = code15[i] & 0x1f; 456 457 if (code < 768) 458 { 459 if (code < N_SC_FORM0) 460 sc[i] = sc_form_0[code] | (r << 20) | (r << 15); 461 else if (code < (N_SC_FORM0 + N_SC_FORM1)) 462 sc[i] = sc_form_1[code - N_SC_FORM0] | (r << 20) | (r << 4); 463 else if (code < (N_SC_FORM0 + N_SC_FORM1 + N_SC_FORM2)) 464 sc[i] = sc_form_2[code - (N_SC_FORM0 + N_SC_FORM1)] 465 | (r << 15); 466 else 467 sc[i] = sc_form_3[code - 468 (N_SC_FORM0 + N_SC_FORM1 + N_SC_FORM2)] 469 | (r << 20); 470 } 471 else 472 { 473 int jtype = (code15[i] >> 9) & 15; 474 int offset = code15[i] & 511; 475 if (offset & 256) 476 offset -= 512; 477 if (jtype < 14) 478 sc[i] = 479 0x00200000 | ((jtype >> 1) << 22) | ((jtype & 1) << 19); 480 else if (jtype == 14) 481 sc[i] = 0x00300000; 482 else 483 sc[i] = 0x00340000; 484 sc[i] |= ((pc >> 2) + offset); 485 } 486 } 487 return 1; 488 } 489} 490