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Diffstat (limited to 'tools/debugger/xenitp/ia64-opc.c')
| -rw-r--r-- | tools/debugger/xenitp/ia64-opc.c | 727 |
1 files changed, 0 insertions, 727 deletions
diff --git a/tools/debugger/xenitp/ia64-opc.c b/tools/debugger/xenitp/ia64-opc.c deleted file mode 100644 index 7e67a7fe86..0000000000 --- a/tools/debugger/xenitp/ia64-opc.c +++ /dev/null @@ -1,727 +0,0 @@ -/* ia64-opc.c -- Functions to access the compacted opcode table - Copyright 1999, 2000, 2001, 2003, 2005 Free Software Foundation, Inc. - Written by Bob Manson of Cygnus Solutions, <manson@cygnus.com> - - This file is part of GDB, GAS, and the GNU binutils. - - GDB, GAS, and the GNU binutils are free software; you can redistribute - them and/or modify them under the terms of the GNU General Public - License as published by the Free Software Foundation; either version - 2, or (at your option) any later version. - - GDB, GAS, and the GNU binutils are distributed in the hope that they - 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 file; see the file COPYING. If not, write to the - Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA - 02110-1301, USA. */ - -#include "ia64-asmtab.h" -#include "ia64-asmtab.c" - -static void get_opc_prefix (const char **, char *); -static short int find_string_ent (const char *); -static short int find_main_ent (short int); -static short int find_completer (short int, short int, const char *); -static ia64_insn apply_completer (ia64_insn, int); -static int extract_op_bits (int, int, int); -static int extract_op (int, int *, unsigned int *); -static int opcode_verify (ia64_insn, int, enum ia64_insn_type); -static int locate_opcode_ent (ia64_insn, enum ia64_insn_type); -static struct ia64_opcode *make_ia64_opcode - (ia64_insn, const char *, int, int); -static struct ia64_opcode *ia64_find_matching_opcode - (const char *, short int); - -const struct ia64_templ_desc ia64_templ_desc[16] = - { - { 0, { IA64_UNIT_M, IA64_UNIT_I, IA64_UNIT_I }, "MII" }, /* 0 */ - { 2, { IA64_UNIT_M, IA64_UNIT_I, IA64_UNIT_I }, "MII" }, - { 0, { IA64_UNIT_M, IA64_UNIT_L, IA64_UNIT_X }, "MLX" }, - { 0, { 0, }, "-3-" }, - { 0, { IA64_UNIT_M, IA64_UNIT_M, IA64_UNIT_I }, "MMI" }, /* 4 */ - { 1, { IA64_UNIT_M, IA64_UNIT_M, IA64_UNIT_I }, "MMI" }, - { 0, { IA64_UNIT_M, IA64_UNIT_F, IA64_UNIT_I }, "MFI" }, - { 0, { IA64_UNIT_M, IA64_UNIT_M, IA64_UNIT_F }, "MMF" }, - { 0, { IA64_UNIT_M, IA64_UNIT_I, IA64_UNIT_B }, "MIB" }, /* 8 */ - { 0, { IA64_UNIT_M, IA64_UNIT_B, IA64_UNIT_B }, "MBB" }, - { 0, { 0, }, "-a-" }, - { 0, { IA64_UNIT_B, IA64_UNIT_B, IA64_UNIT_B }, "BBB" }, - { 0, { IA64_UNIT_M, IA64_UNIT_M, IA64_UNIT_B }, "MMB" }, /* c */ - { 0, { 0, }, "-d-" }, - { 0, { IA64_UNIT_M, IA64_UNIT_F, IA64_UNIT_B }, "MFB" }, - { 0, { 0, }, "-f-" }, - }; - - -/* Copy the prefix contained in *PTR (up to a '.' or a NUL) to DEST. - PTR will be adjusted to point to the start of the next portion - of the opcode, or at the NUL character. */ - -static void -get_opc_prefix (const char **ptr, char *dest) -{ - char *c = strchr (*ptr, '.'); - if (c != NULL) - { - memcpy (dest, *ptr, c - *ptr); - dest[c - *ptr] = '\0'; - *ptr = c + 1; - } - else - { - int l = strlen (*ptr); - memcpy (dest, *ptr, l); - dest[l] = '\0'; - *ptr += l; - } -} - -/* Find the index of the entry in the string table corresponding to - STR; return -1 if one does not exist. */ - -static short -find_string_ent (const char *str) -{ - short start = 0; - short end = sizeof (ia64_strings) / sizeof (const char *); - short i = (start + end) / 2; - - if (strcmp (str, ia64_strings[end - 1]) > 0) - { - return -1; - } - while (start <= end) - { - int c = strcmp (str, ia64_strings[i]); - if (c < 0) - { - end = i - 1; - } - else if (c == 0) - { - return i; - } - else - { - start = i + 1; - } - i = (start + end) / 2; - } - return -1; -} - -/* Find the opcode in the main opcode table whose name is STRINGINDEX, or - return -1 if one does not exist. */ - -static short -find_main_ent (short nameindex) -{ - short start = 0; - short end = sizeof (main_table) / sizeof (struct ia64_main_table); - short i = (start + end) / 2; - - if (nameindex < main_table[0].name_index - || nameindex > main_table[end - 1].name_index) - { - return -1; - } - while (start <= end) - { - if (nameindex < main_table[i].name_index) - { - end = i - 1; - } - else if (nameindex == main_table[i].name_index) - { - while (i > 0 && main_table[i - 1].name_index == nameindex) - { - i--; - } - return i; - } - else - { - start = i + 1; - } - i = (start + end) / 2; - } - return -1; -} - -/* Find the index of the entry in the completer table that is part of - MAIN_ENT (starting from PREV_COMPLETER) that matches NAME, or - return -1 if one does not exist. */ - -static short -find_completer (short main_ent, short prev_completer, const char *name) -{ - short name_index = find_string_ent (name); - - if (name_index < 0) - { - return -1; - } - - if (prev_completer == -1) - { - prev_completer = main_table[main_ent].completers; - } - else - { - prev_completer = completer_table[prev_completer].subentries; - } - - while (prev_completer != -1) - { - if (completer_table[prev_completer].name_index == name_index) - { - return prev_completer; - } - prev_completer = completer_table[prev_completer].alternative; - } - return -1; -} - -/* Apply the completer referred to by COMPLETER_INDEX to OPCODE, and - return the result. */ - -static ia64_insn -apply_completer (ia64_insn opcode, int completer_index) -{ - ia64_insn mask = completer_table[completer_index].mask; - ia64_insn bits = completer_table[completer_index].bits; - int shiftamt = (completer_table[completer_index].offset & 63); - - mask = mask << shiftamt; - bits = bits << shiftamt; - opcode = (opcode & ~mask) | bits; - return opcode; -} - -/* Extract BITS number of bits starting from OP_POINTER + BITOFFSET in - the dis_table array, and return its value. (BITOFFSET is numbered - starting from MSB to LSB, so a BITOFFSET of 0 indicates the MSB of the - first byte in OP_POINTER.) */ - -static int -extract_op_bits (int op_pointer, int bitoffset, int bits) -{ - int res = 0; - - op_pointer += (bitoffset / 8); - - if (bitoffset % 8) - { - unsigned int op = dis_table[op_pointer++]; - int numb = 8 - (bitoffset % 8); - int mask = (1 << numb) - 1; - int bata = (bits < numb) ? bits : numb; - int delta = numb - bata; - - res = (res << bata) | ((op & mask) >> delta); - bitoffset += bata; - bits -= bata; - } - while (bits >= 8) - { - res = (res << 8) | (dis_table[op_pointer++] & 255); - bits -= 8; - } - if (bits > 0) - { - unsigned int op = (dis_table[op_pointer++] & 255); - res = (res << bits) | (op >> (8 - bits)); - } - return res; -} - -/* Examine the state machine entry at OP_POINTER in the dis_table - array, and extract its values into OPVAL and OP. The length of the - state entry in bits is returned. */ - -static int -extract_op (int op_pointer, int *opval, unsigned int *op) -{ - int oplen = 5; - - *op = dis_table[op_pointer]; - - if ((*op) & 0x40) - { - opval[0] = extract_op_bits (op_pointer, oplen, 5); - oplen += 5; - } - switch ((*op) & 0x30) - { - case 0x10: - { - opval[1] = extract_op_bits (op_pointer, oplen, 8); - oplen += 8; - opval[1] += op_pointer; - break; - } - case 0x20: - { - opval[1] = extract_op_bits (op_pointer, oplen, 16); - if (! (opval[1] & 32768)) - { - opval[1] += op_pointer; - } - oplen += 16; - break; - } - case 0x30: - { - oplen--; - opval[2] = extract_op_bits (op_pointer, oplen, 12); - oplen += 12; - opval[2] |= 32768; - break; - } - } - if (((*op) & 0x08) && (((*op) & 0x30) != 0x30)) - { - opval[2] = extract_op_bits (op_pointer, oplen, 16); - oplen += 16; - if (! (opval[2] & 32768)) - { - opval[2] += op_pointer; - } - } - return oplen; -} - -/* Returns a non-zero value if the opcode in the main_table list at - PLACE matches OPCODE and is of type TYPE. */ - -static int -opcode_verify (ia64_insn opcode, int place, enum ia64_insn_type type) -{ - if (main_table[place].opcode_type != type) - { - return 0; - } - if (main_table[place].flags - & (IA64_OPCODE_F2_EQ_F3 | IA64_OPCODE_LEN_EQ_64MCNT)) - { - const struct ia64_operand *o1, *o2; - ia64_insn f2, f3; - - if (main_table[place].flags & IA64_OPCODE_F2_EQ_F3) - { - o1 = elf64_ia64_operands + IA64_OPND_F2; - o2 = elf64_ia64_operands + IA64_OPND_F3; - (*o1->extract) (o1, opcode, &f2); - (*o2->extract) (o2, opcode, &f3); - if (f2 != f3) - return 0; - } - else - { - ia64_insn len, count; - - /* length must equal 64-count: */ - o1 = elf64_ia64_operands + IA64_OPND_LEN6; - o2 = elf64_ia64_operands + main_table[place].operands[2]; - (*o1->extract) (o1, opcode, &len); - (*o2->extract) (o2, opcode, &count); - if (len != 64 - count) - return 0; - } - } - return 1; -} - -/* Find an instruction entry in the ia64_dis_names array that matches - opcode OPCODE and is of type TYPE. Returns either a positive index - into the array, or a negative value if an entry for OPCODE could - not be found. Checks all matches and returns the one with the highest - priority. */ - -static int -locate_opcode_ent (ia64_insn opcode, enum ia64_insn_type type) -{ - int currtest[41]; - int bitpos[41]; - int op_ptr[41]; - int currstatenum = 0; - short found_disent = -1; - short found_priority = -1; - - currtest[currstatenum] = 0; - op_ptr[currstatenum] = 0; - bitpos[currstatenum] = 40; - - while (1) - { - int op_pointer = op_ptr[currstatenum]; - unsigned int op; - int currbitnum = bitpos[currstatenum]; - int oplen; - int opval[3] = {0}; - int next_op; - int currbit; - - oplen = extract_op (op_pointer, opval, &op); - - bitpos[currstatenum] = currbitnum; - - /* Skip opval[0] bits in the instruction. */ - if (op & 0x40) - { - currbitnum -= opval[0]; - } - - /* The value of the current bit being tested. */ - currbit = opcode & (((ia64_insn) 1) << currbitnum) ? 1 : 0; - next_op = -1; - - /* We always perform the tests specified in the current state in - a particular order, falling through to the next test if the - previous one failed. */ - switch (currtest[currstatenum]) - { - case 0: - currtest[currstatenum]++; - if (currbit == 0 && (op & 0x80)) - { - /* Check for a zero bit. If this test solely checks for - a zero bit, we can check for up to 8 consecutive zero - bits (the number to check is specified by the lower 3 - bits in the state code.) - - If the state instruction matches, we go to the very - next state instruction; otherwise, try the next test. */ - - if ((op & 0xf8) == 0x80) - { - int count = op & 0x7; - int x; - - for (x = 0; x <= count; x++) - { - int i = - opcode & (((ia64_insn) 1) << (currbitnum - x)) ? 1 : 0; - if (i) - { - break; - } - } - if (x > count) - { - next_op = op_pointer + ((oplen + 7) / 8); - currbitnum -= count; - break; - } - } - else if (! currbit) - { - next_op = op_pointer + ((oplen + 7) / 8); - break; - } - } - /* FALLTHROUGH */ - case 1: - /* If the bit in the instruction is one, go to the state - instruction specified by opval[1]. */ - currtest[currstatenum]++; - if (currbit && (op & 0x30) != 0 && ((op & 0x30) != 0x30)) - { - next_op = opval[1]; - break; - } - /* FALLTHROUGH */ - case 2: - /* Don't care. Skip the current bit and go to the state - instruction specified by opval[2]. - - An encoding of 0x30 is special; this means that a 12-bit - offset into the ia64_dis_names[] array is specified. */ - currtest[currstatenum]++; - if ((op & 0x08) || ((op & 0x30) == 0x30)) - { - next_op = opval[2]; - break; - } - } - - /* If bit 15 is set in the address of the next state, an offset - in the ia64_dis_names array was specified instead. We then - check to see if an entry in the list of opcodes matches the - opcode we were given; if so, we have succeeded. */ - - if ((next_op >= 0) && (next_op & 32768)) - { - short disent = next_op & 32767; - short priority = -1; - - if (next_op > 65535) - { - abort (); - } - - /* Run through the list of opcodes to check, trying to find - one that matches. */ - while (disent >= 0) - { - int place = ia64_dis_names[disent].insn_index; - - priority = ia64_dis_names[disent].priority; - - if (opcode_verify (opcode, place, type) - && priority > found_priority) - { - break; - } - if (ia64_dis_names[disent].next_flag) - { - disent++; - } - else - { - disent = -1; - } - } - - if (disent >= 0) - { - found_disent = disent; - found_priority = priority; - } - /* Try the next test in this state, regardless of whether a match - was found. */ - next_op = -2; - } - - /* next_op == -1 is "back up to the previous state". - next_op == -2 is "stay in this state and try the next test". - Otherwise, transition to the state indicated by next_op. */ - - if (next_op == -1) - { - currstatenum--; - if (currstatenum < 0) - { - return found_disent; - } - } - else if (next_op >= 0) - { - currstatenum++; - bitpos[currstatenum] = currbitnum - 1; - op_ptr[currstatenum] = next_op; - currtest[currstatenum] = 0; - } - } -} - -/* Construct an ia64_opcode entry based on OPCODE, NAME and PLACE. */ - -static struct ia64_opcode * -make_ia64_opcode (ia64_insn opcode, const char *name, int place, int depind) -{ - struct ia64_opcode *res = - (struct ia64_opcode *) malloc (sizeof (struct ia64_opcode)); - res->name = strdup (name); - res->type = main_table[place].opcode_type; - res->num_outputs = main_table[place].num_outputs; - res->opcode = opcode; - res->mask = main_table[place].mask; - res->operands[0] = main_table[place].operands[0]; - res->operands[1] = main_table[place].operands[1]; - res->operands[2] = main_table[place].operands[2]; - res->operands[3] = main_table[place].operands[3]; - res->operands[4] = main_table[place].operands[4]; - res->flags = main_table[place].flags; - res->ent_index = place; - res->dependencies = &op_dependencies[depind]; - return res; -} - -/* Determine the ia64_opcode entry for the opcode specified by INSN - and TYPE. If a valid entry is not found, return NULL. */ -struct ia64_opcode * -ia64_dis_opcode (ia64_insn insn, enum ia64_insn_type type) -{ - int disent = locate_opcode_ent (insn, type); - - if (disent < 0) - { - return NULL; - } - else - { - unsigned int cb = ia64_dis_names[disent].completer_index; - static char name[128]; - int place = ia64_dis_names[disent].insn_index; - int ci = main_table[place].completers; - ia64_insn tinsn = main_table[place].opcode; - - strcpy (name, ia64_strings [main_table[place].name_index]); - - while (cb) - { - if (cb & 1) - { - int cname = completer_table[ci].name_index; - - tinsn = apply_completer (tinsn, ci); - - if (ia64_strings[cname][0] != '\0') - { - strcat (name, "."); - strcat (name, ia64_strings[cname]); - } - if (cb != 1) - { - ci = completer_table[ci].subentries; - } - } - else - { - ci = completer_table[ci].alternative; - } - if (ci < 0) - { - abort (); - } - cb = cb >> 1; - } - if (tinsn != (insn & main_table[place].mask)) - { - abort (); - } - return make_ia64_opcode (insn, name, place, - completer_table[ci].dependencies); - } -} - -/* Search the main_opcode table starting from PLACE for an opcode that - matches NAME. Return NULL if one is not found. */ - -static struct ia64_opcode * -ia64_find_matching_opcode (const char *name, short place) -{ - char op[129]; - const char *suffix; - short name_index; - - if (strlen (name) > 128) - { - return NULL; - } - suffix = name; - get_opc_prefix (&suffix, op); - name_index = find_string_ent (op); - if (name_index < 0) - { - return NULL; - } - - while (main_table[place].name_index == name_index) - { - const char *curr_suffix = suffix; - ia64_insn curr_insn = main_table[place].opcode; - short completer = -1; - - do { - if (suffix[0] == '\0') - { - completer = find_completer (place, completer, suffix); - } - else - { - get_opc_prefix (&curr_suffix, op); - completer = find_completer (place, completer, op); - } - if (completer != -1) - { - curr_insn = apply_completer (curr_insn, completer); - } - } while (completer != -1 && curr_suffix[0] != '\0'); - - if (completer != -1 && curr_suffix[0] == '\0' - && completer_table[completer].terminal_completer) - { - int depind = completer_table[completer].dependencies; - return make_ia64_opcode (curr_insn, name, place, depind); - } - else - { - place++; - } - } - return NULL; -} - -/* Find the next opcode after PREV_ENT that matches PREV_ENT, or return NULL - if one does not exist. - - It is the caller's responsibility to invoke ia64_free_opcode () to - release any resources used by the returned entry. */ - -struct ia64_opcode * -ia64_find_next_opcode (struct ia64_opcode *prev_ent) -{ - return ia64_find_matching_opcode (prev_ent->name, - prev_ent->ent_index + 1); -} - -/* Find the first opcode that matches NAME, or return NULL if it does - not exist. - - It is the caller's responsibility to invoke ia64_free_opcode () to - release any resources used by the returned entry. */ - -struct ia64_opcode * -ia64_find_opcode (const char *name) -{ - char op[129]; - const char *suffix; - short place; - short name_index; - - if (strlen (name) > 128) - { - return NULL; - } - suffix = name; - get_opc_prefix (&suffix, op); - name_index = find_string_ent (op); - if (name_index < 0) - { - return NULL; - } - - place = find_main_ent (name_index); - - if (place < 0) - { - return NULL; - } - return ia64_find_matching_opcode (name, place); -} - -/* Free any resources used by ENT. */ -void -ia64_free_opcode (struct ia64_opcode *ent) -{ - free ((void *)ent->name); - free (ent); -} - -const struct ia64_dependency * -ia64_find_dependency (int index) -{ - index = DEP(index); - - if (index < 0 - || index >= (int)(sizeof(dependencies) / sizeof(dependencies[0]))) - return NULL; - - return &dependencies[index]; -} |