--- /dev/null
+/* Disassembly routines for TMS320C30 architecture
+ Copyright (C) 1998 Free Software Foundation, Inc.
+ Contributed by Steven Haworth (steve@pm.cse.rmit.edu.au)
+
+ 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 <errno.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include "dis-asm.h"
+#include "opcode/tic30.h"
+
+#define NORMAL_INSN 1
+#define PARALLEL_INSN 2
+
+/* Gets the type of instruction based on the top 2 or 3 bits of the
+ instruction word. */
+#define GET_TYPE(insn) (insn & 0x80000000 ? insn & 0xC0000000 : insn & 0xE0000000)
+
+/* Instruction types. */
+#define TWO_OPERAND_1 0x00000000
+#define TWO_OPERAND_2 0x40000000
+#define THREE_OPERAND 0x20000000
+#define PAR_STORE 0xC0000000
+#define MUL_ADDS 0x80000000
+#define BRANCHES 0x60000000
+
+/* Specific instruction id bits. */
+#define NORMAL_IDEN 0x1F800000
+#define PAR_STORE_IDEN 0x3E000000
+#define MUL_ADD_IDEN 0x2C000000
+#define BR_IMM_IDEN 0x1F000000
+#define BR_COND_IDEN 0x1C3F0000
+
+/* Addressing modes. */
+#define AM_REGISTER 0x00000000
+#define AM_DIRECT 0x00200000
+#define AM_INDIRECT 0x00400000
+#define AM_IMM 0x00600000
+
+#define P_FIELD 0x03000000
+
+#define REG_AR0 0x08
+#define LDP_INSN 0x08700000
+
+/* TMS320C30 program counter for current instruction. */
+static unsigned int _pc;
+
+struct instruction
+ {
+ int type;
+ template *tm;
+ partemplate *ptm;
+ };
+
+int get_tic30_instruction PARAMS ((unsigned long, struct instruction *));
+int print_two_operand
+ PARAMS ((disassemble_info *, unsigned long, struct instruction *));
+int print_three_operand
+ PARAMS ((disassemble_info *, unsigned long, struct instruction *));
+int print_par_insn
+ PARAMS ((disassemble_info *, unsigned long, struct instruction *));
+int print_branch
+ PARAMS ((disassemble_info *, unsigned long, struct instruction *));
+int get_indirect_operand PARAMS ((unsigned short, int, char *));
+int get_register_operand PARAMS ((unsigned char, char *));
+int cnvt_tmsfloat_ieee PARAMS ((unsigned long, int, float *));
+
+int
+print_insn_tic30 (pc, info)
+ bfd_vma pc;
+ disassemble_info *info;
+{
+ unsigned long insn_word;
+ struct instruction insn =
+ {0, NULL, NULL};
+ bfd_vma bufaddr = pc - info->buffer_vma;
+ /* Obtain the current instruction word from the buffer. */
+ insn_word = (*(info->buffer + bufaddr) << 24) | (*(info->buffer + bufaddr + 1) << 16) |
+ (*(info->buffer + bufaddr + 2) << 8) | *(info->buffer + bufaddr + 3);
+ _pc = pc / 4;
+ /* Get the instruction refered to by the current instruction word
+ and print it out based on its type. */
+ if (!get_tic30_instruction (insn_word, &insn))
+ return -1;
+ switch (GET_TYPE (insn_word))
+ {
+ case TWO_OPERAND_1:
+ case TWO_OPERAND_2:
+ if (!print_two_operand (info, insn_word, &insn))
+ return -1;
+ break;
+ case THREE_OPERAND:
+ if (!print_three_operand (info, insn_word, &insn))
+ return -1;
+ break;
+ case PAR_STORE:
+ case MUL_ADDS:
+ if (!print_par_insn (info, insn_word, &insn))
+ return -1;
+ break;
+ case BRANCHES:
+ if (!print_branch (info, insn_word, &insn))
+ return -1;
+ break;
+ }
+ return 4;
+}
+
+int
+get_tic30_instruction (insn_word, insn)
+ unsigned long insn_word;
+ struct instruction *insn;
+{
+ switch (GET_TYPE (insn_word))
+ {
+ case TWO_OPERAND_1:
+ case TWO_OPERAND_2:
+ case THREE_OPERAND:
+ insn->type = NORMAL_INSN;
+ {
+ template *current_optab = (template *) tic30_optab;
+ for (; current_optab < tic30_optab_end; current_optab++)
+ {
+ if (GET_TYPE (current_optab->base_opcode) == GET_TYPE (insn_word))
+ {
+ if (current_optab->operands == 0)
+ {
+ if (current_optab->base_opcode == insn_word)
+ {
+ insn->tm = current_optab;
+ break;
+ }
+ }
+ else if ((current_optab->base_opcode & NORMAL_IDEN) == (insn_word & NORMAL_IDEN))
+ {
+ insn->tm = current_optab;
+ break;
+ }
+ }
+ }
+ }
+ break;
+ case PAR_STORE:
+ insn->type = PARALLEL_INSN;
+ {
+ partemplate *current_optab = (partemplate *) tic30_paroptab;
+ for (; current_optab < tic30_paroptab_end; current_optab++)
+ {
+ if (GET_TYPE (current_optab->base_opcode) == GET_TYPE (insn_word))
+ {
+ if ((current_optab->base_opcode & PAR_STORE_IDEN) == (insn_word & PAR_STORE_IDEN))
+ {
+ insn->ptm = current_optab;
+ break;
+ }
+ }
+ }
+ }
+ break;
+ case MUL_ADDS:
+ insn->type = PARALLEL_INSN;
+ {
+ partemplate *current_optab = (partemplate *) tic30_paroptab;
+ for (; current_optab < tic30_paroptab_end; current_optab++)
+ {
+ if (GET_TYPE (current_optab->base_opcode) == GET_TYPE (insn_word))
+ {
+ if ((current_optab->base_opcode & MUL_ADD_IDEN) == (insn_word & MUL_ADD_IDEN))
+ {
+ insn->ptm = current_optab;
+ break;
+ }
+ }
+ }
+ }
+ break;
+ case BRANCHES:
+ insn->type = NORMAL_INSN;
+ {
+ template *current_optab = (template *) tic30_optab;
+ for (; current_optab < tic30_optab_end; current_optab++)
+ {
+ if (GET_TYPE (current_optab->base_opcode) == GET_TYPE (insn_word))
+ {
+ if (current_optab->operand_types[0] & Imm24)
+ {
+ if ((current_optab->base_opcode & BR_IMM_IDEN) == (insn_word & BR_IMM_IDEN))
+ {
+ insn->tm = current_optab;
+ break;
+ }
+ }
+ else if (current_optab->operands > 0)
+ {
+ if ((current_optab->base_opcode & BR_COND_IDEN) == (insn_word & BR_COND_IDEN))
+ {
+ insn->tm = current_optab;
+ break;
+ }
+ }
+ else
+ {
+ if ((current_optab->base_opcode & (BR_COND_IDEN | 0x00800000)) == (insn_word & (BR_COND_IDEN | 0x00800000)))
+ {
+ insn->tm = current_optab;
+ break;
+ }
+ }
+ }
+ }
+ }
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+int
+print_two_operand (info, insn_word, insn)
+ disassemble_info *info;
+ unsigned long insn_word;
+ struct instruction *insn;
+{
+ char name[12];
+ char operand[2][13] =
+ {
+ {0},
+ {0}};
+ float f_number;
+
+ if (insn->tm == NULL)
+ return 0;
+ strcpy (name, insn->tm->name);
+ if (insn->tm->opcode_modifier == AddressMode)
+ {
+ int src_op, dest_op;
+ /* Determine whether instruction is a store or a normal instruction. */
+ if ((insn->tm->operand_types[1] & (Direct | Indirect)) == (Direct | Indirect))
+ {
+ src_op = 1;
+ dest_op = 0;
+ }
+ else
+ {
+ src_op = 0;
+ dest_op = 1;
+ }
+ /* Get the destination register. */
+ if (insn->tm->operands == 2)
+ get_register_operand ((insn_word & 0x001F0000) >> 16, operand[dest_op]);
+ /* Get the source operand based on addressing mode. */
+ switch (insn_word & AddressMode)
+ {
+ case AM_REGISTER:
+ /* Check for the NOP instruction before getting the operand. */
+ if ((insn->tm->operand_types[0] & NotReq) == 0)
+ get_register_operand ((insn_word & 0x0000001F), operand[src_op]);
+ break;
+ case AM_DIRECT:
+ sprintf (operand[src_op], "@0x%lX", (insn_word & 0x0000FFFF));
+ break;
+ case AM_INDIRECT:
+ get_indirect_operand ((insn_word & 0x0000FFFF), 2, operand[src_op]);
+ break;
+ case AM_IMM:
+ /* Get the value of the immediate operand based on variable type. */
+ switch (insn->tm->imm_arg_type)
+ {
+ case Imm_Float:
+ cnvt_tmsfloat_ieee ((insn_word & 0x0000FFFF), 2, &f_number);
+ sprintf (operand[src_op], "%2.2f", f_number);
+ break;
+ case Imm_SInt:
+ sprintf (operand[src_op], "%d", (short) (insn_word & 0x0000FFFF));
+ break;
+ case Imm_UInt:
+ sprintf (operand[src_op], "%lu", (insn_word & 0x0000FFFF));
+ break;
+ default:
+ return 0;
+ }
+ /* Handle special case for LDP instruction. */
+ if ((insn_word & 0xFFFFFF00) == LDP_INSN)
+ {
+ strcpy (name, "ldp");
+ sprintf (operand[0], "0x%06lX", (insn_word & 0x000000FF) << 16);
+ operand[1][0] = '\0';
+ }
+ }
+ }
+ /* Handle case for stack and rotate instructions. */
+ else if (insn->tm->operands == 1)
+ {
+ if (insn->tm->opcode_modifier == StackOp)
+ {
+ get_register_operand ((insn_word & 0x001F0000) >> 16, operand[0]);
+ }
+ }
+ /* Output instruction to stream. */
+ info->fprintf_func (info->stream, " %s %s%c%s", name,
+ operand[0][0] ? operand[0] : "",
+ operand[1][0] ? ',' : ' ',
+ operand[1][0] ? operand[1] : "");
+ return 1;
+}
+
+int
+print_three_operand (info, insn_word, insn)
+ disassemble_info *info;
+ unsigned long insn_word;
+ struct instruction *insn;
+{
+ char operand[3][13] =
+ {
+ {0},
+ {0},
+ {0}};
+
+ if (insn->tm == NULL)
+ return 0;
+ switch (insn_word & AddressMode)
+ {
+ case AM_REGISTER:
+ get_register_operand ((insn_word & 0x000000FF), operand[0]);
+ get_register_operand ((insn_word & 0x0000FF00) >> 8, operand[1]);
+ break;
+ case AM_DIRECT:
+ get_register_operand ((insn_word & 0x000000FF), operand[0]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1]);
+ break;
+ case AM_INDIRECT:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0]);
+ get_register_operand ((insn_word & 0x0000FF00) >> 8, operand[1]);
+ break;
+ case AM_IMM:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1]);
+ break;
+ default:
+ return 0;
+ }
+ if (insn->tm->operands == 3)
+ get_register_operand ((insn_word & 0x001F0000) >> 16, operand[2]);
+ info->fprintf_func (info->stream, " %s %s,%s%c%s", insn->tm->name,
+ operand[0], operand[1],
+ operand[2][0] ? ',' : ' ',
+ operand[2][0] ? operand[2] : "");
+ return 1;
+}
+
+int
+print_par_insn (info, insn_word, insn)
+ disassemble_info *info;
+ unsigned long insn_word;
+ struct instruction *insn;
+{
+ int i;
+ char *name1, *name2;
+ char operand[2][3][13] =
+ {
+ {
+ {0},
+ {0},
+ {0}},
+ {
+ {0},
+ {0},
+ {0}}};
+
+ if (insn->ptm == NULL)
+ return 0;
+ /* Parse out the names of each of the parallel instructions from the
+ q_insn1_insn2 format. */
+ name1 = (char *) strdup (insn->ptm->name + 2);
+ for (i = 0; i < strlen (name1); i++)
+ {
+ if (name1[i] == '_')
+ {
+ name2 = &name1[i + 1];
+ name1[i] = '\0';
+ break;
+ }
+ }
+ /* Get the operands of the instruction based on the operand order. */
+ switch (insn->ptm->oporder)
+ {
+ case OO_4op1:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0][0]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1][1]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[1][0]);
+ get_register_operand ((insn_word >> 22) & 0x07, operand[0][1]);
+ break;
+ case OO_4op2:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0][0]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1][0]);
+ get_register_operand ((insn_word >> 19) & 0x07, operand[1][1]);
+ get_register_operand ((insn_word >> 22) & 0x07, operand[0][1]);
+ break;
+ case OO_4op3:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0][1]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1][1]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[1][0]);
+ get_register_operand ((insn_word >> 22) & 0x07, operand[0][0]);
+ break;
+ case OO_5op1:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0][0]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1][1]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[1][0]);
+ get_register_operand ((insn_word >> 19) & 0x07, operand[0][1]);
+ get_register_operand ((insn_word >> 22) & 0x07, operand[0][2]);
+ break;
+ case OO_5op2:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0][1]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1][1]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[1][0]);
+ get_register_operand ((insn_word >> 19) & 0x07, operand[0][0]);
+ get_register_operand ((insn_word >> 22) & 0x07, operand[0][2]);
+ break;
+ case OO_PField:
+ if (insn_word & 0x00800000)
+ get_register_operand (0x01, operand[0][2]);
+ else
+ get_register_operand (0x00, operand[0][2]);
+ if (insn_word & 0x00400000)
+ get_register_operand (0x03, operand[1][2]);
+ else
+ get_register_operand (0x02, operand[1][2]);
+ switch (insn_word & P_FIELD)
+ {
+ case 0x00000000:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[0][1]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[0][0]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[1][1]);
+ get_register_operand ((insn_word >> 19) & 0x07, operand[1][0]);
+ break;
+ case 0x01000000:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[1][0]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[0][0]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[1][1]);
+ get_register_operand ((insn_word >> 19) & 0x07, operand[0][1]);
+ break;
+ case 0x02000000:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[1][1]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[1][0]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[0][1]);
+ get_register_operand ((insn_word >> 19) & 0x07, operand[0][0]);
+ break;
+ case 0x03000000:
+ get_indirect_operand ((insn_word & 0x000000FF), 1, operand[1][1]);
+ get_indirect_operand ((insn_word & 0x0000FF00) >> 8, 1, operand[0][0]);
+ get_register_operand ((insn_word >> 16) & 0x07, operand[1][0]);
+ get_register_operand ((insn_word >> 19) & 0x07, operand[0][1]);
+ break;
+ }
+ break;
+ default:
+ return 0;
+ }
+ info->fprintf_func (info->stream, " %s %s,%s%c%s", name1,
+ operand[0][0], operand[0][1],
+ operand[0][2][0] ? ',' : ' ',
+ operand[0][2][0] ? operand[0][2] : "");
+ info->fprintf_func (info->stream, "\n\t\t\t|| %s %s,%s%c%s", name2,
+ operand[1][0], operand[1][1],
+ operand[1][2][0] ? ',' : ' ',
+ operand[1][2][0] ? operand[1][2] : "");
+ free (name1);
+ return 1;
+}
+
+int
+print_branch (info, insn_word, insn)
+ disassemble_info *info;
+ unsigned long insn_word;
+ struct instruction *insn;
+{
+ char operand[2][13] =
+ {
+ {0},
+ {0}};
+ unsigned long address;
+ int print_label = 0;
+
+ if (insn->tm == NULL)
+ return 0;
+ /* Get the operands for 24-bit immediate jumps. */
+ if (insn->tm->operand_types[0] & Imm24)
+ {
+ address = insn_word & 0x00FFFFFF;
+ sprintf (operand[0], "0x%lX", address);
+ print_label = 1;
+ }
+ /* Get the operand for the trap instruction. */
+ else if (insn->tm->operand_types[0] & IVector)
+ {
+ address = insn_word & 0x0000001F;
+ sprintf (operand[0], "0x%lX", address);
+ }
+ else
+ {
+ address = insn_word & 0x0000FFFF;
+ /* Get the operands for the DB instructions. */
+ if (insn->tm->operands == 2)
+ {
+ get_register_operand (((insn_word & 0x01C00000) >> 22) + REG_AR0, operand[0]);
+ if (insn_word & PCRel)
+ {
+ sprintf (operand[1], "%d", (short) address);
+ print_label = 1;
+ }
+ else
+ get_register_operand (insn_word & 0x0000001F, operand[1]);
+ }
+ /* Get the operands for the standard branches. */
+ else if (insn->tm->operands == 1)
+ {
+ if (insn_word & PCRel)
+ {
+ address = (short) address;
+ sprintf (operand[0], "%ld", address);
+ print_label = 1;
+ }
+ else
+ get_register_operand (insn_word & 0x0000001F, operand[0]);
+ }
+ }
+ info->fprintf_func (info->stream, " %s %s%c%s", insn->tm->name,
+ operand[0][0] ? operand[0] : "",
+ operand[1][0] ? ',' : ' ',
+ operand[1][0] ? operand[1] : "");
+ /* Print destination of branch in relation to current symbol. */
+ if (print_label && info->symbol)
+ {
+ if ((insn->tm->opcode_modifier == PCRel) && (insn_word & PCRel))
+ {
+ address = (_pc + 1 + (short) address) - ((info->symbol->section->vma + info->symbol->value) / 4);
+ /* Check for delayed instruction, if so adjust destination. */
+ if (insn_word & 0x00200000)
+ address += 2;
+ }
+ else
+ {
+ address -= ((info->symbol->section->vma + info->symbol->value) / 4);
+ }
+ if (address == 0)
+ info->fprintf_func (info->stream, " <%s>", info->symbol->name);
+ else
+ info->fprintf_func (info->stream, " <%s %c %d>", info->symbol->name,
+ ((short) address < 0) ? '-' : '+',
+ abs (address));
+ }
+ return 1;
+}
+
+int
+get_indirect_operand (fragment, size, buffer)
+ unsigned short fragment;
+ int size;
+ char *buffer;
+{
+ unsigned char mod;
+ unsigned arnum;
+ unsigned char disp;
+
+ if (buffer == NULL)
+ return 0;
+ /* Determine which bits identify the sections of the indirect operand based on the
+ size in bytes. */
+ switch (size)
+ {
+ case 1:
+ mod = (fragment & 0x00F8) >> 3;
+ arnum = (fragment & 0x0007);
+ disp = 0;
+ break;
+ case 2:
+ mod = (fragment & 0xF800) >> 11;
+ arnum = (fragment & 0x0700) >> 8;
+ disp = (fragment & 0x00FF);
+ break;
+ default:
+ return 0;
+ }
+ {
+ const ind_addr_type *current_ind = tic30_indaddr_tab;
+ for (; current_ind < tic30_indaddrtab_end; current_ind++)
+ {
+ if (current_ind->modfield == mod)
+ {
+ if (current_ind->displacement == IMPLIED_DISP && size == 2)
+ {
+ continue;
+ }
+ else
+ {
+ int i, bufcnt;
+ for (i = 0, bufcnt = 0; i < strlen (current_ind->syntax); i++, bufcnt++)
+ {
+ buffer[bufcnt] = current_ind->syntax[i];
+ if (buffer[bufcnt - 1] == 'a' && buffer[bufcnt] == 'r')
+ buffer[++bufcnt] = arnum + '0';
+ if (buffer[bufcnt] == '(' && current_ind->displacement == DISP_REQUIRED)
+ {
+ sprintf (&buffer[bufcnt + 1], "%u", disp);
+ bufcnt += strlen (&buffer[bufcnt + 1]);
+ }
+ }
+ buffer[bufcnt + 1] = '\0';
+ break;
+ }
+ }
+ }
+ }
+ return 1;
+}
+
+int
+get_register_operand (fragment, buffer)
+ unsigned char fragment;
+ char *buffer;
+{
+ const reg *current_reg = tic30_regtab;
+
+ if (buffer == NULL)
+ return 0;
+ for (; current_reg < tic30_regtab_end; current_reg++)
+ {
+ if ((fragment & 0x1F) == current_reg->opcode)
+ {
+ strcpy (buffer, current_reg->name);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int
+cnvt_tmsfloat_ieee (tmsfloat, size, ieeefloat)
+ unsigned long tmsfloat;
+ int size;
+ float *ieeefloat;
+{
+ unsigned long exp, sign, mant;
+
+ if (size == 2)
+ {
+ if ((tmsfloat & 0x0000F000) == 0x00008000)
+ tmsfloat = 0x80000000;
+ else
+ {
+ tmsfloat <<= 16;
+ tmsfloat = (long) tmsfloat >> 4;
+ }
+ }
+ exp = tmsfloat & 0xFF000000;
+ if (exp == 0x80000000)
+ {
+ *ieeefloat = 0.0;
+ return 1;
+ }
+ exp += 0x7F000000;
+ sign = (tmsfloat & 0x00800000) << 8;
+ mant = tmsfloat & 0x007FFFFF;
+ if (exp == 0xFF000000)
+ {
+ if (mant == 0)
+ *ieeefloat = ERANGE;
+ if (sign == 0)
+ *ieeefloat = 1.0 / 0.0;
+ else
+ *ieeefloat = -1.0 / 0.0;
+ return 1;
+ }
+ exp >>= 1;
+ if (sign)
+ {
+ mant = (~mant) & 0x007FFFFF;
+ mant += 1;
+ exp += mant & 0x00800000;
+ exp &= 0x7F800000;
+ mant &= 0x007FFFFF;
+ }
+ if (tmsfloat == 0x80000000)
+ sign = mant = exp = 0;
+ tmsfloat = sign | exp | mant;
+ *ieeefloat = *((float *) &tmsfloat);
+ return 1;
+}
projects / binutils-gdb.git / commitdiff