| /* Print instructions for the Texas TMS320C[34]X, for GDB and GNU Binutils. |
| |
| Copyright 2002, 2003 Free Software Foundation, Inc. |
| |
| Contributed by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz) |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include <math.h> |
| #include "libiberty.h" |
| #include "dis-asm.h" |
| #include "opcode/tic4x.h" |
| |
| #define TIC4X_DEBUG 0 |
| |
| #define TIC4X_HASH_SIZE 11 /* 11 (bits) and above should give unique entries. */ |
| #define TIC4X_SPESOP_SIZE 8 /* Max 8. ops for special instructions */ |
| |
| typedef enum |
| { |
| IMMED_SINT, |
| IMMED_SUINT, |
| IMMED_SFLOAT, |
| IMMED_INT, |
| IMMED_UINT, |
| IMMED_FLOAT |
| } |
| immed_t; |
| |
| typedef enum |
| { |
| INDIRECT_SHORT, |
| INDIRECT_LONG, |
| INDIRECT_TIC4X |
| } |
| indirect_t; |
| |
| static int tic4x_version = 0; |
| static int tic4x_dp = 0; |
| |
| static int tic4x_pc_offset |
| PARAMS ((unsigned int)); |
| static int tic4x_print_char |
| PARAMS ((struct disassemble_info *, char)); |
| static int tic4x_print_str |
| PARAMS ((struct disassemble_info *, char *)); |
| static int tic4x_print_register |
| PARAMS ((struct disassemble_info *, unsigned long)); |
| static int tic4x_print_addr |
| PARAMS ((struct disassemble_info *, unsigned long)); |
| static int tic4x_print_relative |
| PARAMS ((struct disassemble_info *, unsigned long, long, unsigned long)); |
| void tic4x_print_ftoa |
| PARAMS ((unsigned int, FILE *, fprintf_ftype)); |
| static int tic4x_print_direct |
| PARAMS ((struct disassemble_info *, unsigned long)); |
| static int tic4x_print_immed |
| PARAMS ((struct disassemble_info *, immed_t, unsigned long)); |
| static int tic4x_print_cond |
| PARAMS ((struct disassemble_info *, unsigned int)); |
| static int tic4x_print_indirect |
| PARAMS ((struct disassemble_info *, indirect_t, unsigned long)); |
| static int tic4x_print_op |
| PARAMS ((struct disassemble_info *, unsigned long, tic4x_inst_t *, unsigned long)); |
| static void tic4x_hash_opcode_special |
| PARAMS ((tic4x_inst_t **, const tic4x_inst_t *)); |
| static void tic4x_hash_opcode |
| PARAMS ((tic4x_inst_t **, tic4x_inst_t **, const tic4x_inst_t *, unsigned long)); |
| static int tic4x_disassemble |
| PARAMS ((unsigned long, unsigned long, struct disassemble_info *)); |
| int print_insn_tic4x |
| PARAMS ((bfd_vma, struct disassemble_info *)); |
| |
| |
| static int |
| tic4x_pc_offset (op) |
| unsigned int op; |
| { |
| /* Determine the PC offset for a C[34]x instruction. |
| This could be simplified using some boolean algebra |
| but at the expense of readability. */ |
| switch (op >> 24) |
| { |
| case 0x60: /* br */ |
| case 0x62: /* call (C4x) */ |
| case 0x64: /* rptb (C4x) */ |
| return 1; |
| case 0x61: /* brd */ |
| case 0x63: /* laj */ |
| case 0x65: /* rptbd (C4x) */ |
| return 3; |
| case 0x66: /* swi */ |
| case 0x67: |
| return 0; |
| default: |
| break; |
| } |
| |
| switch ((op & 0xffe00000) >> 20) |
| { |
| case 0x6a0: /* bB */ |
| case 0x720: /* callB */ |
| case 0x740: /* trapB */ |
| return 1; |
| |
| case 0x6a2: /* bBd */ |
| case 0x6a6: /* bBat */ |
| case 0x6aa: /* bBaf */ |
| case 0x722: /* lajB */ |
| case 0x748: /* latB */ |
| case 0x798: /* rptbd */ |
| return 3; |
| |
| default: |
| break; |
| } |
| |
| switch ((op & 0xfe200000) >> 20) |
| { |
| case 0x6e0: /* dbB */ |
| return 1; |
| |
| case 0x6e2: /* dbBd */ |
| return 3; |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| tic4x_print_char (info, ch) |
| struct disassemble_info * info; |
| char ch; |
| { |
| if (info != NULL) |
| (*info->fprintf_func) (info->stream, "%c", ch); |
| return 1; |
| } |
| |
| static int |
| tic4x_print_str (info, str) |
| struct disassemble_info *info; |
| char *str; |
| { |
| if (info != NULL) |
| (*info->fprintf_func) (info->stream, "%s", str); |
| return 1; |
| } |
| |
| static int |
| tic4x_print_register (info, regno) |
| struct disassemble_info *info; |
| unsigned long regno; |
| { |
| static tic4x_register_t **registertable = NULL; |
| unsigned int i; |
| |
| if (registertable == NULL) |
| { |
| registertable = (tic4x_register_t **) |
| xmalloc (sizeof (tic4x_register_t *) * REG_TABLE_SIZE); |
| for (i = 0; i < tic3x_num_registers; i++) |
| registertable[tic3x_registers[i].regno] = (void *)&tic3x_registers[i]; |
| if (IS_CPU_TIC4X (tic4x_version)) |
| { |
| /* Add C4x additional registers, overwriting |
| any C3x registers if necessary. */ |
| for (i = 0; i < tic4x_num_registers; i++) |
| registertable[tic4x_registers[i].regno] = (void *)&tic4x_registers[i]; |
| } |
| } |
| if ((int) regno > (IS_CPU_TIC4X (tic4x_version) ? TIC4X_REG_MAX : TIC3X_REG_MAX)) |
| return 0; |
| if (info != NULL) |
| (*info->fprintf_func) (info->stream, "%s", registertable[regno]->name); |
| return 1; |
| } |
| |
| static int |
| tic4x_print_addr (info, addr) |
| struct disassemble_info *info; |
| unsigned long addr; |
| { |
| if (info != NULL) |
| (*info->print_address_func)(addr, info); |
| return 1; |
| } |
| |
| static int |
| tic4x_print_relative (info, pc, offset, opcode) |
| struct disassemble_info *info; |
| unsigned long pc; |
| long offset; |
| unsigned long opcode; |
| { |
| return tic4x_print_addr (info, pc + offset + tic4x_pc_offset (opcode)); |
| } |
| |
| static int |
| tic4x_print_direct (info, arg) |
| struct disassemble_info *info; |
| unsigned long arg; |
| { |
| if (info != NULL) |
| { |
| (*info->fprintf_func) (info->stream, "@"); |
| tic4x_print_addr (info, arg + (tic4x_dp << 16)); |
| } |
| return 1; |
| } |
| |
| /* FIXME: make the floating point stuff not rely on host |
| floating point arithmetic. */ |
| void |
| tic4x_print_ftoa (val, stream, pfunc) |
| unsigned int val; |
| FILE *stream; |
| fprintf_ftype pfunc; |
| { |
| int e; |
| int s; |
| int f; |
| double num = 0.0; |
| |
| e = EXTRS (val, 31, 24); /* exponent */ |
| if (e != -128) |
| { |
| s = EXTRU (val, 23, 23); /* sign bit */ |
| f = EXTRU (val, 22, 0); /* mantissa */ |
| if (s) |
| f += -2 * (1 << 23); |
| else |
| f += (1 << 23); |
| num = f / (double)(1 << 23); |
| num = ldexp (num, e); |
| } |
| (*pfunc)(stream, "%.9g", num); |
| } |
| |
| static int |
| tic4x_print_immed (info, type, arg) |
| struct disassemble_info *info; |
| immed_t type; |
| unsigned long arg; |
| { |
| int s; |
| int f; |
| int e; |
| double num = 0.0; |
| |
| if (info == NULL) |
| return 1; |
| switch (type) |
| { |
| case IMMED_SINT: |
| case IMMED_INT: |
| (*info->fprintf_func) (info->stream, "%d", (long)arg); |
| break; |
| |
| case IMMED_SUINT: |
| case IMMED_UINT: |
| (*info->fprintf_func) (info->stream, "%u", arg); |
| break; |
| |
| case IMMED_SFLOAT: |
| e = EXTRS (arg, 15, 12); |
| if (e != -8) |
| { |
| s = EXTRU (arg, 11, 11); |
| f = EXTRU (arg, 10, 0); |
| if (s) |
| f += -2 * (1 << 11); |
| else |
| f += (1 << 11); |
| num = f / (double)(1 << 11); |
| num = ldexp (num, e); |
| } |
| (*info->fprintf_func) (info->stream, "%f", num); |
| break; |
| case IMMED_FLOAT: |
| e = EXTRS (arg, 31, 24); |
| if (e != -128) |
| { |
| s = EXTRU (arg, 23, 23); |
| f = EXTRU (arg, 22, 0); |
| if (s) |
| f += -2 * (1 << 23); |
| else |
| f += (1 << 23); |
| num = f / (double)(1 << 23); |
| num = ldexp (num, e); |
| } |
| (*info->fprintf_func) (info->stream, "%f", num); |
| break; |
| } |
| return 1; |
| } |
| |
| static int |
| tic4x_print_cond (info, cond) |
| struct disassemble_info *info; |
| unsigned int cond; |
| { |
| static tic4x_cond_t **condtable = NULL; |
| unsigned int i; |
| |
| if (condtable == NULL) |
| { |
| condtable = (tic4x_cond_t **)xmalloc (sizeof (tic4x_cond_t *) * 32); |
| for (i = 0; i < tic4x_num_conds; i++) |
| condtable[tic4x_conds[i].cond] = (void *)&tic4x_conds[i]; |
| } |
| if (cond > 31 || condtable[cond] == NULL) |
| return 0; |
| if (info != NULL) |
| (*info->fprintf_func) (info->stream, "%s", condtable[cond]->name); |
| return 1; |
| } |
| |
| static int |
| tic4x_print_indirect (info, type, arg) |
| struct disassemble_info *info; |
| indirect_t type; |
| unsigned long arg; |
| { |
| unsigned int aregno; |
| unsigned int modn; |
| unsigned int disp; |
| char *a; |
| |
| aregno = 0; |
| modn = 0; |
| disp = 1; |
| switch(type) |
| { |
| case INDIRECT_TIC4X: /* *+ARn(disp) */ |
| disp = EXTRU (arg, 7, 3); |
| aregno = EXTRU (arg, 2, 0) + REG_AR0; |
| modn = 0; |
| break; |
| case INDIRECT_SHORT: |
| disp = 1; |
| aregno = EXTRU (arg, 2, 0) + REG_AR0; |
| modn = EXTRU (arg, 7, 3); |
| break; |
| case INDIRECT_LONG: |
| disp = EXTRU (arg, 7, 0); |
| aregno = EXTRU (arg, 10, 8) + REG_AR0; |
| modn = EXTRU (arg, 15, 11); |
| if (modn > 7 && disp != 0) |
| return 0; |
| break; |
| default: |
| (*info->fprintf_func)(info->stream, "# internal error: Unknown indirect type %d", type); |
| return 0; |
| } |
| if (modn > TIC3X_MODN_MAX) |
| return 0; |
| a = tic4x_indirects[modn].name; |
| while (*a) |
| { |
| switch (*a) |
| { |
| case 'a': |
| tic4x_print_register (info, aregno); |
| break; |
| case 'd': |
| tic4x_print_immed (info, IMMED_UINT, disp); |
| break; |
| case 'y': |
| tic4x_print_str (info, "ir0"); |
| break; |
| case 'z': |
| tic4x_print_str (info, "ir1"); |
| break; |
| default: |
| tic4x_print_char (info, *a); |
| break; |
| } |
| a++; |
| } |
| return 1; |
| } |
| |
| static int |
| tic4x_print_op (info, instruction, p, pc) |
| struct disassemble_info *info; |
| unsigned long instruction; |
| tic4x_inst_t *p; |
| unsigned long pc; |
| { |
| int val; |
| char *s; |
| char *parallel = NULL; |
| |
| /* Print instruction name. */ |
| s = p->name; |
| while (*s && parallel == NULL) |
| { |
| switch (*s) |
| { |
| case 'B': |
| if (! tic4x_print_cond (info, EXTRU (instruction, 20, 16))) |
| return 0; |
| break; |
| case 'C': |
| if (! tic4x_print_cond (info, EXTRU (instruction, 27, 23))) |
| return 0; |
| break; |
| case '_': |
| parallel = s + 1; /* Skip past `_' in name */ |
| break; |
| default: |
| tic4x_print_char (info, *s); |
| break; |
| } |
| s++; |
| } |
| |
| /* Print arguments. */ |
| s = p->args; |
| if (*s) |
| tic4x_print_char (info, ' '); |
| |
| while (*s) |
| { |
| switch (*s) |
| { |
| case '*': /* indirect 0--15 */ |
| if (! tic4x_print_indirect (info, INDIRECT_LONG, |
| EXTRU (instruction, 15, 0))) |
| return 0; |
| break; |
| |
| case '#': /* only used for ldp, ldpk */ |
| tic4x_print_immed (info, IMMED_UINT, EXTRU (instruction, 15, 0)); |
| break; |
| |
| case '@': /* direct 0--15 */ |
| tic4x_print_direct (info, EXTRU (instruction, 15, 0)); |
| break; |
| |
| case 'A': /* address register 24--22 */ |
| if (! tic4x_print_register (info, EXTRU (instruction, 24, 22) + |
| REG_AR0)) |
| return 0; |
| break; |
| |
| case 'B': /* 24-bit unsigned int immediate br(d)/call/rptb |
| address 0--23. */ |
| if (IS_CPU_TIC4X (tic4x_version)) |
| tic4x_print_relative (info, pc, EXTRS (instruction, 23, 0), |
| p->opcode); |
| else |
| tic4x_print_addr (info, EXTRU (instruction, 23, 0)); |
| break; |
| |
| case 'C': /* indirect (short C4x) 0--7 */ |
| if (! IS_CPU_TIC4X (tic4x_version)) |
| return 0; |
| if (! tic4x_print_indirect (info, INDIRECT_TIC4X, |
| EXTRU (instruction, 7, 0))) |
| return 0; |
| break; |
| |
| case 'D': |
| /* Cockup if get here... */ |
| break; |
| |
| case 'E': /* register 0--7 */ |
| case 'e': |
| if (! tic4x_print_register (info, EXTRU (instruction, 7, 0))) |
| return 0; |
| break; |
| |
| case 'F': /* 16-bit float immediate 0--15 */ |
| tic4x_print_immed (info, IMMED_SFLOAT, |
| EXTRU (instruction, 15, 0)); |
| break; |
| |
| case 'i': /* Extended indirect 0--7 */ |
| if ( EXTRU (instruction, 7, 5) == 7 ) |
| { |
| if( !tic4x_print_register (info, EXTRU (instruction, 4, 0)) ) |
| return 0; |
| break; |
| } |
| /* Fallthrough */ |
| |
| case 'I': /* indirect (short) 0--7 */ |
| if (! tic4x_print_indirect (info, INDIRECT_SHORT, |
| EXTRU (instruction, 7, 0))) |
| return 0; |
| break; |
| |
| case 'j': /* Extended indirect 8--15 */ |
| if ( EXTRU (instruction, 15, 13) == 7 ) |
| { |
| if( !tic4x_print_register (info, EXTRU (instruction, 12, 8)) ) |
| return 0; |
| break; |
| } |
| |
| case 'J': /* indirect (short) 8--15 */ |
| if (! tic4x_print_indirect (info, INDIRECT_SHORT, |
| EXTRU (instruction, 15, 8))) |
| return 0; |
| break; |
| |
| case 'G': /* register 8--15 */ |
| case 'g': |
| if (! tic4x_print_register (info, EXTRU (instruction, 15, 8))) |
| return 0; |
| break; |
| |
| case 'H': /* register 16--18 */ |
| if (! tic4x_print_register (info, EXTRU (instruction, 18, 16))) |
| return 0; |
| break; |
| |
| case 'K': /* register 19--21 */ |
| if (! tic4x_print_register (info, EXTRU (instruction, 21, 19))) |
| return 0; |
| break; |
| |
| case 'L': /* register 22--24 */ |
| if (! tic4x_print_register (info, EXTRU (instruction, 24, 22))) |
| return 0; |
| break; |
| |
| case 'M': /* register 22--22 */ |
| tic4x_print_register (info, EXTRU (instruction, 22, 22) + REG_R2); |
| break; |
| |
| case 'N': /* register 23--23 */ |
| tic4x_print_register (info, EXTRU (instruction, 23, 23) + REG_R0); |
| break; |
| |
| case 'O': /* indirect (short C4x) 8--15 */ |
| if (! IS_CPU_TIC4X (tic4x_version)) |
| return 0; |
| if (! tic4x_print_indirect (info, INDIRECT_TIC4X, |
| EXTRU (instruction, 15, 8))) |
| return 0; |
| break; |
| |
| case 'P': /* displacement 0--15 (used by Bcond and BcondD) */ |
| tic4x_print_relative (info, pc, EXTRS (instruction, 15, 0), |
| p->opcode); |
| break; |
| |
| case 'Q': /* register 0--15 */ |
| case 'q': |
| if (! tic4x_print_register (info, EXTRU (instruction, 15, 0))) |
| return 0; |
| break; |
| |
| case 'R': /* register 16--20 */ |
| case 'r': |
| if (! tic4x_print_register (info, EXTRU (instruction, 20, 16))) |
| return 0; |
| break; |
| |
| case 'S': /* 16-bit signed immediate 0--15 */ |
| tic4x_print_immed (info, IMMED_SINT, |
| EXTRS (instruction, 15, 0)); |
| break; |
| |
| case 'T': /* 5-bit signed immediate 16--20 (C4x stik) */ |
| if (! IS_CPU_TIC4X (tic4x_version)) |
| return 0; |
| if (! tic4x_print_immed (info, IMMED_SUINT, |
| EXTRU (instruction, 20, 16))) |
| return 0; |
| break; |
| |
| case 'U': /* 16-bit unsigned int immediate 0--15 */ |
| tic4x_print_immed (info, IMMED_SUINT, EXTRU (instruction, 15, 0)); |
| break; |
| |
| case 'V': /* 5/9-bit unsigned vector 0--4/8 */ |
| tic4x_print_immed (info, IMMED_SUINT, |
| IS_CPU_TIC4X (tic4x_version) ? |
| EXTRU (instruction, 8, 0) : |
| EXTRU (instruction, 4, 0) & ~0x20); |
| break; |
| |
| case 'W': /* 8-bit signed immediate 0--7 */ |
| if (! IS_CPU_TIC4X (tic4x_version)) |
| return 0; |
| tic4x_print_immed (info, IMMED_SINT, EXTRS (instruction, 7, 0)); |
| break; |
| |
| case 'X': /* expansion register 4--0 */ |
| val = EXTRU (instruction, 4, 0) + REG_IVTP; |
| if (val < REG_IVTP || val > REG_TVTP) |
| return 0; |
| if (! tic4x_print_register (info, val)) |
| return 0; |
| break; |
| |
| case 'Y': /* address register 16--20 */ |
| val = EXTRU (instruction, 20, 16); |
| if (val < REG_AR0 || val > REG_SP) |
| return 0; |
| if (! tic4x_print_register (info, val)) |
| return 0; |
| break; |
| |
| case 'Z': /* expansion register 16--20 */ |
| val = EXTRU (instruction, 20, 16) + REG_IVTP; |
| if (val < REG_IVTP || val > REG_TVTP) |
| return 0; |
| if (! tic4x_print_register (info, val)) |
| return 0; |
| break; |
| |
| case '|': /* Parallel instruction */ |
| tic4x_print_str (info, " || "); |
| tic4x_print_str (info, parallel); |
| tic4x_print_char (info, ' '); |
| break; |
| |
| case ';': |
| tic4x_print_char (info, ','); |
| break; |
| |
| default: |
| tic4x_print_char (info, *s); |
| break; |
| } |
| s++; |
| } |
| return 1; |
| } |
| |
| static void |
| tic4x_hash_opcode_special (optable_special, inst) |
| tic4x_inst_t **optable_special; |
| const tic4x_inst_t *inst; |
| { |
| int i; |
| |
| for( i=0; i<TIC4X_SPESOP_SIZE; i++ ) |
| if( optable_special[i] != NULL |
| && optable_special[i]->opcode == inst->opcode ) |
| { |
| /* Collision (we have it already) - overwrite */ |
| optable_special[i] = (void *)inst; |
| return; |
| } |
| |
| for( i=0; i<TIC4X_SPESOP_SIZE; i++ ) |
| if( optable_special[i] == NULL ) |
| { |
| /* Add the new opcode */ |
| optable_special[i] = (void *)inst; |
| return; |
| } |
| |
| /* This should never occur. This happens if the number of special |
| instructions exceeds TIC4X_SPESOP_SIZE. Please increase the variable |
| of this variable */ |
| #if TIC4X_DEBUG |
| printf("optable_special[] is full, please increase TIC4X_SPESOP_SIZE!\n"); |
| #endif |
| } |
| |
| static void |
| tic4x_hash_opcode (optable, optable_special, inst, tic4x_oplevel) |
| tic4x_inst_t **optable; |
| tic4x_inst_t **optable_special; |
| const tic4x_inst_t *inst; |
| const unsigned long tic4x_oplevel; |
| { |
| int j; |
| int opcode = inst->opcode >> (32 - TIC4X_HASH_SIZE); |
| int opmask = inst->opmask >> (32 - TIC4X_HASH_SIZE); |
| |
| /* Use a TIC4X_HASH_SIZE bit index as a hash index. We should |
| have unique entries so there's no point having a linked list |
| for each entry? */ |
| for (j = opcode; j < opmask; j++) |
| if ( (j & opmask) == opcode |
| && inst->oplevel & tic4x_oplevel ) |
| { |
| #if TIC4X_DEBUG |
| /* We should only have collisions for synonyms like |
| ldp for ldi. */ |
| if (optable[j] != NULL) |
| printf("Collision at index %d, %s and %s\n", |
| j, optable[j]->name, inst->name); |
| #endif |
| /* Catch those ops that collide with others already inside the |
| hash, and have a opmask greater than the one we use in the |
| hash. Store them in a special-list, that will handle full |
| 32-bit INSN, not only the first 11-bit (or so). */ |
| if ( optable[j] != NULL |
| && inst->opmask & ~(opmask << (32 - TIC4X_HASH_SIZE)) ) |
| { |
| /* Add the instruction already on the list */ |
| tic4x_hash_opcode_special(optable_special, optable[j]); |
| |
| /* Add the new instruction */ |
| tic4x_hash_opcode_special(optable_special, inst); |
| } |
| |
| optable[j] = (void *)inst; |
| } |
| } |
| |
| /* Disassemble the instruction in 'instruction'. |
| 'pc' should be the address of this instruction, it will |
| be used to print the target address if this is a relative jump or call |
| the disassembled instruction is written to 'info'. |
| The function returns the length of this instruction in words. */ |
| |
| static int |
| tic4x_disassemble (pc, instruction, info) |
| unsigned long pc; |
| unsigned long instruction; |
| struct disassemble_info *info; |
| { |
| static tic4x_inst_t **optable = NULL; |
| static tic4x_inst_t **optable_special = NULL; |
| tic4x_inst_t *p; |
| int i; |
| unsigned long tic4x_oplevel; |
| |
| tic4x_version = info->mach; |
| |
| tic4x_oplevel = (IS_CPU_TIC4X (tic4x_version)) ? OP_C4X : 0; |
| tic4x_oplevel |= OP_C3X|OP_LPWR|OP_IDLE2|OP_ENH; |
| |
| if (optable == NULL) |
| { |
| optable = (tic4x_inst_t **) |
| xcalloc (sizeof (tic4x_inst_t *), (1 << TIC4X_HASH_SIZE)); |
| |
| optable_special = (tic4x_inst_t **) |
| xcalloc (sizeof (tic4x_inst_t *), TIC4X_SPESOP_SIZE ); |
| |
| /* Install opcodes in reverse order so that preferred |
| forms overwrite synonyms. */ |
| for (i = tic4x_num_insts - 1; i >= 0; i--) |
| tic4x_hash_opcode (optable, optable_special, &tic4x_insts[i], tic4x_oplevel); |
| |
| /* We now need to remove the insn that are special from the |
| "normal" optable, to make the disasm search this extra list |
| for them. |
| */ |
| for (i=0; i<TIC4X_SPESOP_SIZE; i++) |
| if ( optable_special[i] != NULL ) |
| optable[optable_special[i]->opcode >> (32 - TIC4X_HASH_SIZE)] = NULL; |
| } |
| |
| /* See if we can pick up any loading of the DP register... */ |
| if ((instruction >> 16) == 0x5070 || (instruction >> 16) == 0x1f70) |
| tic4x_dp = EXTRU (instruction, 15, 0); |
| |
| p = optable[instruction >> (32 - TIC4X_HASH_SIZE)]; |
| if ( p != NULL ) |
| { |
| if ( ((instruction & p->opmask) == p->opcode) |
| && tic4x_print_op (NULL, instruction, p, pc) ) |
| tic4x_print_op (info, instruction, p, pc); |
| else |
| (*info->fprintf_func) (info->stream, "%08x", instruction); |
| } |
| else |
| { |
| for (i = 0; i<TIC4X_SPESOP_SIZE; i++) |
| if (optable_special[i] != NULL |
| && optable_special[i]->opcode == instruction ) |
| { |
| (*info->fprintf_func)(info->stream, "%s", optable_special[i]->name); |
| break; |
| } |
| if (i==TIC4X_SPESOP_SIZE) |
| (*info->fprintf_func) (info->stream, "%08x", instruction); |
| } |
| |
| /* Return size of insn in words. */ |
| return 1; |
| } |
| |
| /* The entry point from objdump and gdb. */ |
| int |
| print_insn_tic4x (memaddr, info) |
| bfd_vma memaddr; |
| struct disassemble_info *info; |
| { |
| int status; |
| unsigned long pc; |
| unsigned long op; |
| bfd_byte buffer[4]; |
| |
| status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| if (status != 0) |
| { |
| (*info->memory_error_func) (status, memaddr, info); |
| return -1; |
| } |
| |
| pc = memaddr; |
| op = bfd_getl32 (buffer); |
| info->bytes_per_line = 4; |
| info->bytes_per_chunk = 4; |
| info->octets_per_byte = 4; |
| info->display_endian = BFD_ENDIAN_LITTLE; |
| return tic4x_disassemble (pc, op, info) * 4; |
| } |