| /* tc-h8500.c -- Assemble code for the Hitachi H8/500 |
| Copyright (C) 1993, 94, 95, 1998 Free Software Foundation. |
| |
| This file is part of GAS, the GNU Assembler. |
| |
| GAS 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, or (at your option) |
| any later version. |
| |
| GAS 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 GAS; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| /* |
| Written By Steve Chamberlain |
| sac@cygnus.com |
| */ |
| |
| #include <stdio.h> |
| #include "as.h" |
| #include "bfd.h" |
| #include "subsegs.h" |
| #define DEFINE_TABLE |
| #define ASSEMBLER_TABLE |
| #include "opcodes/h8500-opc.h" |
| #include <ctype.h> |
| |
| const char comment_chars[] = "!"; |
| const char line_separator_chars[] = ";"; |
| const char line_comment_chars[] = "!#"; |
| |
| /* This table describes all the machine specific pseudo-ops the assembler |
| has to support. The fields are: |
| pseudo-op name without dot |
| function to call to execute this pseudo-op |
| Integer arg to pass to the function |
| */ |
| |
| void cons (); |
| |
| const pseudo_typeS md_pseudo_table[] = |
| { |
| {"int", cons, 2}, |
| {"data.b", cons, 1}, |
| {"data.w", cons, 2}, |
| {"data.l", cons, 4}, |
| {"form", listing_psize, 0}, |
| {"heading", listing_title, 0}, |
| {"import", s_ignore, 0}, |
| {"page", listing_eject, 0}, |
| {"program", s_ignore, 0}, |
| {0, 0, 0} |
| }; |
| |
| const int md_reloc_size; |
| |
| const char EXP_CHARS[] = "eE"; |
| |
| /* Chars that mean this number is a floating point constant */ |
| /* As in 0f12.456 */ |
| /* or 0d1.2345e12 */ |
| const char FLT_CHARS[] = "rRsSfFdDxXpP"; |
| |
| #define C(a,b) ENCODE_RELAX(a,b) |
| #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) |
| |
| #define GET_WHAT(x) ((x>>2)) |
| |
| #define BYTE_DISP 1 |
| #define WORD_DISP 2 |
| #define UNDEF_BYTE_DISP 0 |
| #define UNDEF_WORD_DISP 3 |
| |
| #define BRANCH 1 |
| #define SCB_F 2 |
| #define SCB_TST 3 |
| #define END 4 |
| |
| #define BYTE_F 127 |
| #define BYTE_B -126 |
| #define WORD_F 32767 |
| #define WORD_B 32768 |
| |
| relax_typeS md_relax_table[C (END, 0)]; |
| |
| static struct hash_control *opcode_hash_control; /* Opcode mnemonics */ |
| |
| /* |
| This function is called once, at assembler startup time. This should |
| set up all the tables, etc that the MD part of the assembler needs |
| */ |
| |
| void |
| md_begin () |
| { |
| h8500_opcode_info *opcode; |
| char prev_buffer[100]; |
| int idx = 0; |
| register relax_typeS *table; |
| |
| opcode_hash_control = hash_new (); |
| prev_buffer[0] = 0; |
| |
| /* Insert unique names into hash table */ |
| for (opcode = h8500_table; opcode->name; opcode++) |
| { |
| if (idx != opcode->idx) |
| { |
| hash_insert (opcode_hash_control, opcode->name, (char *) opcode); |
| idx++; |
| } |
| } |
| |
| /* Initialize the relax table. We use a local variable to avoid |
| warnings about modifying a supposedly const data structure. */ |
| table = (relax_typeS *) md_relax_table; |
| table[C (BRANCH, BYTE_DISP)].rlx_forward = BYTE_F; |
| table[C (BRANCH, BYTE_DISP)].rlx_backward = BYTE_B; |
| table[C (BRANCH, BYTE_DISP)].rlx_length = 2; |
| table[C (BRANCH, BYTE_DISP)].rlx_more = C (BRANCH, WORD_DISP); |
| |
| table[C (BRANCH, WORD_DISP)].rlx_forward = WORD_F; |
| table[C (BRANCH, WORD_DISP)].rlx_backward = WORD_B; |
| table[C (BRANCH, WORD_DISP)].rlx_length = 3; |
| table[C (BRANCH, WORD_DISP)].rlx_more = 0; |
| |
| table[C (SCB_F, BYTE_DISP)].rlx_forward = BYTE_F; |
| table[C (SCB_F, BYTE_DISP)].rlx_backward = BYTE_B; |
| table[C (SCB_F, BYTE_DISP)].rlx_length = 3; |
| table[C (SCB_F, BYTE_DISP)].rlx_more = C (SCB_F, WORD_DISP); |
| |
| table[C (SCB_F, WORD_DISP)].rlx_forward = WORD_F; |
| table[C (SCB_F, WORD_DISP)].rlx_backward = WORD_B; |
| table[C (SCB_F, WORD_DISP)].rlx_length = 8; |
| table[C (SCB_F, WORD_DISP)].rlx_more = 0; |
| |
| table[C (SCB_TST, BYTE_DISP)].rlx_forward = BYTE_F; |
| table[C (SCB_TST, BYTE_DISP)].rlx_backward = BYTE_B; |
| table[C (SCB_TST, BYTE_DISP)].rlx_length = 3; |
| table[C (SCB_TST, BYTE_DISP)].rlx_more = C (SCB_TST, WORD_DISP); |
| |
| table[C (SCB_TST, WORD_DISP)].rlx_forward = WORD_F; |
| table[C (SCB_TST, WORD_DISP)].rlx_backward = WORD_B; |
| table[C (SCB_TST, WORD_DISP)].rlx_length = 10; |
| table[C (SCB_TST, WORD_DISP)].rlx_more = 0; |
| |
| } |
| |
| static int rn; /* register number used by RN */ |
| static int rs; /* register number used by RS */ |
| static int rd; /* register number used by RD */ |
| static int crb; /* byte size cr */ |
| static int crw; /* word sized cr */ |
| static int cr; /* unknown size cr */ |
| |
| static expressionS displacement;/* displacement expression */ |
| static int displacement_size; /* and size if given */ |
| |
| static int immediate_inpage; |
| static expressionS immediate; /* immediate expression */ |
| static int immediate_size; /* and size if given */ |
| |
| static expressionS absolute; /* absolute expression */ |
| static int absolute_size; /* and size if given */ |
| |
| typedef struct |
| { |
| int type; |
| int reg; |
| expressionS exp; |
| int page; |
| } |
| |
| h8500_operand_info; |
| |
| /* try and parse a reg name, returns number of chars consumed */ |
| static int |
| parse_reg (src, mode, reg) |
| char *src; |
| int *mode; |
| int *reg; |
| { |
| char *end; |
| int len; |
| |
| /* Cribbed from get_symbol_end(). */ |
| if (!is_name_beginner (*src) || *src == '\001') |
| return 0; |
| end = src+1; |
| while (is_part_of_name (*end) || *end == '\001') |
| end++; |
| len = end - src; |
| |
| if (len == 2 && src[0] == 'r') |
| { |
| if (src[1] >= '0' && src[1] <= '7') |
| { |
| *mode = RN; |
| *reg = (src[1] - '0'); |
| return len; |
| } |
| } |
| if (len == 2 && src[0] == 's' && src[1] == 'p') |
| { |
| *mode = RN; |
| *reg = 7; |
| return len; |
| } |
| if (len == 3 && src[0] == 'c' && src[1] == 'c' && src[2] == 'r') |
| { |
| *mode = CRB; |
| *reg = 1; |
| return len; |
| } |
| if (len == 2 && src[0] == 's' && src[1] == 'r') |
| { |
| *mode = CRW; |
| *reg = 0; |
| return len; |
| } |
| if (len == 2 && src[0] == 'b' && src[1] == 'r') |
| { |
| *mode = CRB; |
| *reg = 3; |
| return len; |
| } |
| if (len == 2 && src[0] == 'e' && src[1] == 'p') |
| { |
| *mode = CRB; |
| *reg = 4; |
| return len; |
| } |
| if (len == 2 && src[0] == 'd' && src[1] == 'p') |
| { |
| *mode = CRB; |
| *reg = 5; |
| return len; |
| } |
| if (len == 2 && src[0] == 't' && src[1] == 'p') |
| { |
| *mode = CRB; |
| *reg = 7; |
| return len; |
| } |
| if (len == 2 && src[0] == 'f' && src[1] == 'p') |
| { |
| *mode = RN; |
| *reg = 6; |
| return len; |
| } |
| return 0; |
| } |
| |
| static |
| char * |
| parse_exp (s, op, page) |
| char *s; |
| expressionS *op; |
| int *page; |
| { |
| char *save; |
| char *new; |
| |
| save = input_line_pointer; |
| |
| *page = 0; |
| if (s[0] == '%') |
| { |
| if (s[1] == 'p' && s[2] == 'a' && s[3] == 'g' && s[4] == 'e') |
| { |
| s += 5; |
| *page = 'p'; |
| } |
| if (s[1] == 'h' && s[2] == 'i' && s[3] == '1' && s[4] == '6') |
| { |
| s += 5; |
| *page = 'h'; |
| } |
| else if (s[1] == 'o' && s[2] == 'f' && s[3] == 'f') |
| { |
| s += 4; |
| *page = 'o'; |
| } |
| } |
| |
| input_line_pointer = s; |
| |
| expression (op); |
| if (op->X_op == O_absent) |
| as_bad (_("missing operand")); |
| new = input_line_pointer; |
| input_line_pointer = save; |
| return new; |
| } |
| |
| typedef enum |
| { |
| exp_signed, exp_unsigned, exp_sandu |
| } sign_type; |
| |
| |
| static char * |
| skip_colonthing (sign, ptr, exp, def, size8, size16, size24) |
| sign_type sign; |
| char *ptr; |
| h8500_operand_info *exp; |
| int def; |
| int size8; |
| int size16; |
| int size24; |
| { |
| ptr = parse_exp (ptr, &exp->exp, &exp->page); |
| if (*ptr == ':') |
| { |
| ptr++; |
| if (*ptr == '8') |
| { |
| ptr++; |
| exp->type = size8; |
| } |
| else if (ptr[0] == '1' & ptr[1] == '6') |
| { |
| ptr += 2; |
| exp->type = size16; |
| } |
| else if (ptr[0] == '2' & ptr[1] == '4') |
| { |
| if (!size24) |
| { |
| as_bad (_(":24 not valid for this opcode")); |
| } |
| ptr += 2; |
| exp->type = size24; |
| } |
| else |
| { |
| as_bad (_("expect :8,:16 or :24")); |
| exp->type = size16; |
| } |
| } |
| else |
| { |
| if (exp->page == 'p') |
| { |
| exp->type = IMM8; |
| } |
| else if (exp->page == 'h') |
| { |
| exp->type = IMM16; |
| } |
| else |
| { |
| /* Let's work out the size from the context */ |
| int n = exp->exp.X_add_number; |
| if (size8 |
| && exp->exp.X_op == O_constant |
| && ((sign == exp_signed && (n >= -128 && n <= 127)) |
| || (sign == exp_unsigned && (n >= 0 && (n <= 255))) |
| || (sign == exp_sandu && (n >= -128 && (n <= 255))))) |
| { |
| exp->type = size8; |
| } |
| else |
| { |
| exp->type = def; |
| } |
| } |
| } |
| return ptr; |
| } |
| |
| static int |
| parse_reglist (src, op) |
| char *src; |
| h8500_operand_info *op; |
| { |
| int mode; |
| int rn; |
| int mask = 0; |
| int rm; |
| int idx = 1; /* skip ( */ |
| |
| while (src[idx] && src[idx] != ')') |
| { |
| int done = parse_reg (src + idx, &mode, &rn); |
| |
| if (done) |
| { |
| idx += done; |
| mask |= 1 << rn; |
| } |
| else |
| { |
| as_bad (_("syntax error in reg list")); |
| return 0; |
| } |
| if (src[idx] == '-') |
| { |
| idx++; |
| done = parse_reg (src + idx, &mode, &rm); |
| if (done) |
| { |
| idx += done; |
| while (rn <= rm) |
| { |
| mask |= 1 << rn; |
| rn++; |
| } |
| } |
| else |
| { |
| as_bad (_("missing final register in range")); |
| } |
| } |
| if (src[idx] == ',') |
| idx++; |
| } |
| idx++; |
| op->exp.X_add_symbol = 0; |
| op->exp.X_op_symbol = 0; |
| op->exp.X_add_number = mask; |
| op->exp.X_op = O_constant; |
| op->exp.X_unsigned = 1; |
| op->type = IMM8; |
| return idx; |
| |
| } |
| |
| /* The many forms of operand: |
| |
| Rn Register direct |
| @Rn Register indirect |
| @(disp[:size], Rn) Register indirect with displacement |
| @Rn+ |
| @-Rn |
| @aa[:size] absolute |
| #xx[:size] immediate data |
| |
| */ |
| |
| static void |
| get_operand (ptr, op, ispage) |
| char **ptr; |
| h8500_operand_info *op; |
| char ispage; |
| { |
| char *src = *ptr; |
| int mode; |
| unsigned int num; |
| unsigned int len; |
| op->page = 0; |
| if (src[0] == '(' && src[1] == 'r') |
| { |
| /* This is a register list */ |
| *ptr = src + parse_reglist (src, op); |
| return; |
| } |
| |
| len = parse_reg (src, &op->type, &op->reg); |
| |
| if (len) |
| { |
| *ptr = src + len; |
| return; |
| } |
| |
| if (*src == '@') |
| { |
| src++; |
| if (*src == '-') |
| { |
| src++; |
| len = parse_reg (src, &mode, &num); |
| if (len == 0) |
| { |
| /* Oops, not a reg after all, must be ordinary exp */ |
| src--; |
| /* must be a symbol */ |
| *ptr = skip_colonthing (exp_unsigned, src, |
| op, ABS16, ABS8, ABS16, ABS24); |
| return; |
| } |
| |
| op->type = RNDEC; |
| op->reg = num; |
| *ptr = src + len; |
| return; |
| } |
| if (*src == '(') |
| { |
| /* Disp */ |
| src++; |
| |
| src = skip_colonthing (exp_signed, src, |
| op, RNIND_D16, RNIND_D8, RNIND_D16, 0); |
| |
| if (*src != ',') |
| { |
| as_bad (_("expected @(exp, Rn)")); |
| return; |
| } |
| src++; |
| len = parse_reg (src, &mode, &op->reg); |
| if (len == 0 || mode != RN) |
| { |
| as_bad (_("expected @(exp, Rn)")); |
| return; |
| } |
| src += len; |
| if (*src != ')') |
| { |
| as_bad (_("expected @(exp, Rn)")); |
| return; |
| } |
| *ptr = src + 1; |
| return; |
| } |
| len = parse_reg (src, &mode, &num); |
| |
| if (len) |
| { |
| src += len; |
| if (*src == '+') |
| { |
| src++; |
| if (mode != RN) |
| { |
| as_bad (_("@Rn+ needs word register")); |
| return; |
| } |
| op->type = RNINC; |
| op->reg = num; |
| *ptr = src; |
| return; |
| } |
| if (mode != RN) |
| { |
| as_bad (_("@Rn needs word register")); |
| return; |
| } |
| op->type = RNIND; |
| op->reg = num; |
| *ptr = src; |
| return; |
| } |
| else |
| { |
| /* must be a symbol */ |
| *ptr = |
| skip_colonthing (exp_unsigned, src, op, |
| ispage ? ABS24 : ABS16, ABS8, ABS16, ABS24); |
| return; |
| } |
| } |
| |
| if (*src == '#') |
| { |
| src++; |
| *ptr = skip_colonthing (exp_sandu, src, op, IMM16, IMM8, IMM16, ABS24); |
| return; |
| } |
| else |
| { |
| *ptr = skip_colonthing (exp_signed, src, op, |
| ispage ? ABS24 : PCREL8, PCREL8, PCREL16, ABS24); |
| } |
| } |
| |
| static |
| char * |
| get_operands (info, args, operand) |
| h8500_opcode_info *info; |
| char *args; |
| h8500_operand_info *operand; |
| |
| { |
| char *ptr = args; |
| |
| switch (info->nargs) |
| { |
| case 0: |
| operand[0].type = 0; |
| operand[1].type = 0; |
| break; |
| |
| case 1: |
| ptr++; |
| get_operand (&ptr, operand + 0, info->name[0] == 'p'); |
| operand[1].type = 0; |
| break; |
| |
| case 2: |
| ptr++; |
| get_operand (&ptr, operand + 0, 0); |
| if (*ptr == ',') |
| ptr++; |
| get_operand (&ptr, operand + 1, 0); |
| break; |
| |
| default: |
| abort (); |
| } |
| |
| return ptr; |
| } |
| |
| /* Passed a pointer to a list of opcodes which use different |
| addressing modes, return the opcode which matches the opcodes |
| provided |
| */ |
| |
| int pcrel8; /* Set when we've seen a pcrel operand */ |
| |
| static |
| h8500_opcode_info * |
| get_specific (opcode, operands) |
| h8500_opcode_info *opcode; |
| h8500_operand_info *operands; |
| { |
| h8500_opcode_info *this_try = opcode; |
| int found = 0; |
| unsigned int noperands = opcode->nargs; |
| |
| unsigned int this_index = opcode->idx; |
| |
| while (this_index == opcode->idx && !found) |
| { |
| unsigned int i; |
| |
| this_try = opcode++; |
| |
| /* look at both operands needed by the opcodes and provided by |
| the user*/ |
| for (i = 0; i < noperands; i++) |
| { |
| h8500_operand_info *user = operands + i; |
| |
| switch (this_try->arg_type[i]) |
| { |
| case FPIND_D8: |
| /* Opcode needs (disp:8,fp) */ |
| if (user->type == RNIND_D8 && user->reg == 6) |
| { |
| displacement = user->exp; |
| continue; |
| } |
| break; |
| case RDIND_D16: |
| if (user->type == RNIND_D16) |
| { |
| displacement = user->exp; |
| rd = user->reg; |
| continue; |
| } |
| break; |
| case RDIND_D8: |
| if (user->type == RNIND_D8) |
| { |
| displacement = user->exp; |
| rd = user->reg; |
| continue; |
| } |
| break; |
| case RNIND_D16: |
| case RNIND_D8: |
| if (user->type == this_try->arg_type[i]) |
| { |
| displacement = user->exp; |
| rn = user->reg; |
| continue; |
| } |
| break; |
| |
| case SPDEC: |
| if (user->type == RNDEC && user->reg == 7) |
| { |
| continue; |
| } |
| break; |
| case SPINC: |
| if (user->type == RNINC && user->reg == 7) |
| { |
| continue; |
| } |
| break; |
| case ABS16: |
| if (user->type == ABS16) |
| { |
| absolute = user->exp; |
| continue; |
| } |
| break; |
| case ABS8: |
| if (user->type == ABS8) |
| { |
| absolute = user->exp; |
| continue; |
| } |
| break; |
| case ABS24: |
| if (user->type == ABS24) |
| { |
| absolute = user->exp; |
| continue; |
| } |
| break; |
| |
| case CRB: |
| if ((user->type == CRB || user->type == CR) && user->reg != 0) |
| { |
| crb = user->reg; |
| continue; |
| } |
| break; |
| case CRW: |
| if ((user->type == CRW || user->type == CR) && user->reg == 0) |
| { |
| crw = user->reg; |
| continue; |
| } |
| break; |
| case DISP16: |
| if (user->type == DISP16) |
| { |
| displacement = user->exp; |
| continue; |
| } |
| break; |
| case DISP8: |
| if (user->type == DISP8) |
| { |
| displacement = user->exp; |
| continue; |
| } |
| break; |
| case FP: |
| if (user->type == RN && user->reg == 6) |
| { |
| continue; |
| } |
| break; |
| case PCREL16: |
| if (user->type == PCREL16) |
| { |
| displacement = user->exp; |
| continue; |
| } |
| break; |
| case PCREL8: |
| if (user->type == PCREL8) |
| { |
| displacement = user->exp; |
| pcrel8 = 1; |
| continue; |
| } |
| break; |
| |
| case IMM16: |
| if (user->type == IMM16 |
| || user->type == IMM8) |
| { |
| immediate_inpage = user->page; |
| immediate = user->exp; |
| continue; |
| } |
| break; |
| case RLIST: |
| case IMM8: |
| if (user->type == IMM8) |
| { |
| immediate_inpage = user->page; |
| immediate = user->exp; |
| continue; |
| } |
| break; |
| case IMM4: |
| if (user->type == IMM8) |
| { |
| immediate_inpage = user->page; |
| immediate = user->exp; |
| continue; |
| } |
| break; |
| case QIM: |
| if (user->type == IMM8 |
| && user->exp.X_op == O_constant |
| && |
| (user->exp.X_add_number == -2 |
| || user->exp.X_add_number == -1 |
| || user->exp.X_add_number == 1 |
| || user->exp.X_add_number == 2)) |
| { |
| immediate_inpage = user->page; |
| immediate = user->exp; |
| continue; |
| } |
| break; |
| case RD: |
| if (user->type == RN) |
| { |
| rd = user->reg; |
| continue; |
| } |
| break; |
| case RS: |
| if (user->type == RN) |
| { |
| rs = user->reg; |
| continue; |
| } |
| break; |
| case RDIND: |
| if (user->type == RNIND) |
| { |
| rd = user->reg; |
| continue; |
| |
| } |
| break; |
| case RNINC: |
| case RNIND: |
| case RNDEC: |
| case RN: |
| |
| if (user->type == this_try->arg_type[i]) |
| { |
| rn = user->reg; |
| continue; |
| } |
| break; |
| case SP: |
| if (user->type == RN && user->reg == 7) |
| { |
| continue; |
| } |
| break; |
| default: |
| printf (_("unhandled %d\n"), this_try->arg_type[i]); |
| break; |
| } |
| |
| /* If we get here this didn't work out */ |
| goto fail; |
| } |
| found = 1; |
| fail:; |
| |
| } |
| |
| if (found) |
| return this_try; |
| else |
| return 0; |
| } |
| |
| int |
| check (operand, low, high) |
| expressionS *operand; |
| int low; |
| int high; |
| { |
| if (operand->X_op != O_constant |
| || operand->X_add_number < low |
| || operand->X_add_number > high) |
| { |
| as_bad (_("operand must be absolute in range %d..%d"), low, high); |
| } |
| return operand->X_add_number; |
| } |
| |
| static |
| void |
| insert (output, index, exp, reloc, pcrel) |
| char *output; |
| int index; |
| expressionS *exp; |
| int reloc; |
| int pcrel; |
| { |
| fix_new_exp (frag_now, |
| output - frag_now->fr_literal + index, |
| 4, /* always say size is 4, but we know better */ |
| exp, |
| pcrel, |
| reloc); |
| } |
| |
| void |
| build_relaxable_instruction (opcode, operand) |
| h8500_opcode_info *opcode; |
| h8500_operand_info *operand; |
| { |
| /* All relaxable instructions start life as two bytes but can become |
| three bytes long if a lonely branch and up to 9 bytes if long scb |
| */ |
| char *p; |
| int len; |
| int type; |
| |
| if (opcode->bytes[0].contents == 0x01) |
| { |
| type = SCB_F; |
| } |
| else if (opcode->bytes[0].contents == 0x06 |
| || opcode->bytes[0].contents == 0x07) |
| { |
| type = SCB_TST; |
| } |
| else |
| { |
| type = BRANCH; |
| } |
| |
| p = frag_var (rs_machine_dependent, |
| md_relax_table[C (type, WORD_DISP)].rlx_length, |
| len = md_relax_table[C (type, BYTE_DISP)].rlx_length, |
| C (type, UNDEF_BYTE_DISP), |
| displacement.X_add_symbol, |
| displacement.X_add_number, |
| 0); |
| |
| p[0] = opcode->bytes[0].contents; |
| if (type != BRANCH) |
| { |
| p[1] = opcode->bytes[1].contents | rs; |
| } |
| } |
| |
| /* Now we know what sort of opcodes it is, lets build the bytes - |
| */ |
| static void |
| build_bytes (opcode, operand) |
| h8500_opcode_info *opcode; |
| h8500_operand_info *operand; |
| |
| { |
| int index; |
| |
| if (pcrel8) |
| { |
| pcrel8 = 0; |
| build_relaxable_instruction (opcode, operand); |
| } |
| else |
| { |
| char *output = frag_more (opcode->length); |
| |
| memset (output, 0, opcode->length); |
| for (index = 0; index < opcode->length; index++) |
| { |
| output[index] = opcode->bytes[index].contents; |
| |
| switch (opcode->bytes[index].insert) |
| { |
| default: |
| printf (_("failed for %d\n"), opcode->bytes[index].insert); |
| break; |
| case 0: |
| break; |
| case RN: |
| output[index] |= rn; |
| break; |
| case RD: |
| case RDIND: |
| |
| output[index] |= rd; |
| break; |
| case RS: |
| output[index] |= rs; |
| break; |
| case DISP16: |
| insert (output, index, &displacement, R_H8500_IMM16, 0); |
| index++; |
| break; |
| case DISP8: |
| case FPIND_D8: |
| insert (output, index, &displacement, R_H8500_IMM8, 0); |
| break; |
| |
| case IMM16: |
| { |
| int p; |
| switch (immediate_inpage) { |
| case 'p': |
| p = R_H8500_HIGH16; |
| break; |
| case 'h': |
| p = R_H8500_HIGH16; |
| break; |
| default: |
| p = R_H8500_IMM16; |
| break; |
| } |
| |
| insert (output, index, &immediate,p, 0); |
| } |
| |
| index++; |
| break; |
| case RLIST: |
| case IMM8: |
| if (immediate_inpage) |
| { |
| insert (output, index, &immediate, R_H8500_HIGH8, 0); |
| } |
| else |
| { |
| insert (output, index, &immediate, R_H8500_IMM8, 0); |
| } |
| break; |
| case PCREL16: |
| insert (output, index, &displacement, R_H8500_PCREL16, 1); |
| index++; |
| break; |
| case PCREL8: |
| insert (output, index, &displacement, R_H8500_PCREL8, 1); |
| break; |
| case IMM4: |
| output[index] |= check (&immediate, 0, 15); |
| break; |
| case CR: |
| |
| output[index] |= cr; |
| if (cr == 0) |
| { |
| output[0] |= 0x8; |
| } |
| else |
| { |
| output[0] &= ~0x8; |
| } |
| |
| break; |
| |
| case CRB: |
| output[index] |= crb; |
| output[0] &= ~0x8; |
| break; |
| case CRW: |
| output[index] |= crw; |
| output[0] |= 0x8; |
| break; |
| case ABS24: |
| insert (output, index, &absolute, R_H8500_IMM24, 0); |
| index += 2; |
| break; |
| case ABS16: |
| insert (output, index, &absolute, R_H8500_IMM16, 0); |
| index++; |
| break; |
| case ABS8: |
| insert (output, index, &absolute, R_H8500_IMM8, 0); |
| break; |
| case QIM: |
| switch (immediate.X_add_number) |
| { |
| case -2: |
| output[index] |= 0x5; |
| break; |
| case -1: |
| output[index] |= 0x4; |
| break; |
| case 1: |
| output[index] |= 0; |
| break; |
| case 2: |
| output[index] |= 1; |
| break; |
| } |
| break; |
| } |
| } |
| } |
| } |
| |
| /* This is the guts of the machine-dependent assembler. STR points to a |
| machine dependent instruction. This funciton is supposed to emit |
| the frags/bytes it assembles to. |
| */ |
| |
| void |
| DEFUN (md_assemble, (str), |
| char *str) |
| { |
| char *op_start; |
| char *op_end; |
| h8500_operand_info operand[2]; |
| h8500_opcode_info *opcode; |
| h8500_opcode_info *prev_opcode; |
| char name[11]; |
| |
| int nlen = 0; |
| |
| /* Drop leading whitespace */ |
| while (*str == ' ') |
| str++; |
| |
| /* find the op code end */ |
| for (op_start = op_end = str; |
| *op_end && |
| !is_end_of_line[*op_end] && *op_end != ' '; |
| op_end++) |
| { |
| if ( /**op_end != '.' |
| && *op_end != ':' |
| && */ nlen < 10) |
| { |
| name[nlen++] = *op_end; |
| } |
| } |
| name[nlen] = 0; |
| |
| if (op_end == op_start) |
| { |
| as_bad (_("can't find opcode ")); |
| } |
| |
| opcode = (h8500_opcode_info *) hash_find (opcode_hash_control, name); |
| |
| if (opcode == NULL) |
| { |
| as_bad (_("unknown opcode")); |
| return; |
| } |
| |
| get_operands (opcode, op_end, operand); |
| prev_opcode = opcode; |
| |
| opcode = get_specific (opcode, operand); |
| |
| if (opcode == 0) |
| { |
| /* Couldn't find an opcode which matched the operands */ |
| char *where = frag_more (2); |
| |
| where[0] = 0x0; |
| where[1] = 0x0; |
| as_bad (_("invalid operands for opcode")); |
| return; |
| } |
| |
| build_bytes (opcode, operand); |
| |
| } |
| |
| void |
| DEFUN (tc_crawl_symbol_chain, (headers), |
| object_headers * headers) |
| { |
| printf (_("call to tc_crawl_symbol_chain \n")); |
| } |
| |
| symbolS * |
| DEFUN (md_undefined_symbol, (name), |
| char *name) |
| { |
| return 0; |
| } |
| |
| void |
| DEFUN (tc_headers_hook, (headers), |
| object_headers * headers) |
| { |
| printf (_("call to tc_headers_hook \n")); |
| } |
| |
| /* Various routines to kill one day */ |
| /* Equal to MAX_PRECISION in atof-ieee.c */ |
| #define MAX_LITTLENUMS 6 |
| |
| /* Turn a string in input_line_pointer into a floating point constant of type |
| type, and store the appropriate bytes in *litP. The number of LITTLENUMS |
| emitted is stored in *sizeP . An error message is returned, or NULL on OK. |
| */ |
| char * |
| md_atof (type, litP, sizeP) |
| char type; |
| char *litP; |
| int *sizeP; |
| { |
| int prec; |
| LITTLENUM_TYPE words[MAX_LITTLENUMS]; |
| LITTLENUM_TYPE *wordP; |
| char *t; |
| char *atof_ieee (); |
| |
| switch (type) |
| { |
| case 'f': |
| case 'F': |
| case 's': |
| case 'S': |
| prec = 2; |
| break; |
| |
| case 'd': |
| case 'D': |
| case 'r': |
| case 'R': |
| prec = 4; |
| break; |
| |
| case 'x': |
| case 'X': |
| prec = 6; |
| break; |
| |
| case 'p': |
| case 'P': |
| prec = 6; |
| break; |
| |
| default: |
| *sizeP = 0; |
| return _("Bad call to MD_ATOF()"); |
| } |
| t = atof_ieee (input_line_pointer, type, words); |
| if (t) |
| input_line_pointer = t; |
| |
| *sizeP = prec * sizeof (LITTLENUM_TYPE); |
| for (wordP = words; prec--;) |
| { |
| md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE)); |
| litP += sizeof (LITTLENUM_TYPE); |
| } |
| return 0; |
| } |
| |
| CONST char *md_shortopts = ""; |
| struct option md_longopts[] = { |
| {NULL, no_argument, NULL, 0} |
| }; |
| size_t md_longopts_size = sizeof(md_longopts); |
| |
| int |
| md_parse_option (c, arg) |
| int c; |
| char *arg; |
| { |
| return 0; |
| } |
| |
| void |
| md_show_usage (stream) |
| FILE *stream; |
| { |
| } |
| |
| void |
| tc_aout_fix_to_chars () |
| { |
| printf (_("call to tc_aout_fix_to_chars \n")); |
| abort (); |
| } |
| |
| static |
| void |
| wordify_scb (buffer, disp_size, inst_size) |
| char *buffer; |
| int *disp_size; |
| int *inst_size; |
| { |
| int rn = buffer[1] & 0x7; |
| |
| switch (buffer[0]) |
| { |
| case 0x0e: /* BSR */ |
| case 0x20: |
| case 0x21: |
| case 0x22: |
| case 0x23: |
| case 0x24: |
| case 0x25: |
| case 0x26: |
| case 0x27: |
| case 0x28: |
| case 0x29: |
| case 0x2a: |
| case 0x2b: |
| case 0x2c: |
| case 0x2d: |
| case 0x2e: |
| case 0x2f: |
| buffer[0] |= 0x10; |
| buffer[1] = 0; |
| buffer[2] = 0; |
| *disp_size = 2; |
| *inst_size = 1; |
| return; |
| default: |
| abort (); |
| |
| case 0x01: |
| *inst_size = 6; |
| *disp_size = 2; |
| break; |
| case 0x06: |
| *inst_size = 8; |
| *disp_size = 2; |
| |
| *buffer++ = 0x26; /* bne + 8 */ |
| *buffer++ = 0x08; |
| break; |
| case 0x07: |
| *inst_size = 8; |
| *disp_size = 2; |
| *buffer++ = 0x27; /* bne + 8 */ |
| *buffer++ = 0x08; |
| break; |
| |
| } |
| *buffer++ = 0xa8 | rn; /* addq -1,rn */ |
| *buffer++ = 0x0c; |
| *buffer++ = 0x04; /* cmp #0xff:8, rn */ |
| *buffer++ = 0xff; |
| *buffer++ = 0x70 | rn; |
| *buffer++ = 0x36; /* bne ... */ |
| *buffer++ = 0; |
| *buffer++ = 0; |
| } |
| |
| /* |
| called after relaxing, change the frags so they know how big they are |
| */ |
| void |
| md_convert_frag (headers, seg, fragP) |
| object_headers *headers; |
| segT seg; |
| fragS *fragP; |
| { |
| int disp_size = 0; |
| int inst_size = 0; |
| char *buffer = fragP->fr_fix + fragP->fr_literal; |
| |
| switch (fragP->fr_subtype) |
| { |
| case C (BRANCH, BYTE_DISP): |
| disp_size = 1; |
| inst_size = 1; |
| break; |
| |
| case C (SCB_F, BYTE_DISP): |
| case C (SCB_TST, BYTE_DISP): |
| disp_size = 1; |
| inst_size = 2; |
| break; |
| |
| /* Branches to a known 16 bit displacement */ |
| |
| /* Turn on the 16bit bit */ |
| case C (BRANCH, WORD_DISP): |
| case C (SCB_F, WORD_DISP): |
| case C (SCB_TST, WORD_DISP): |
| wordify_scb (buffer, &disp_size, &inst_size); |
| break; |
| |
| case C (BRANCH, UNDEF_WORD_DISP): |
| case C (SCB_F, UNDEF_WORD_DISP): |
| case C (SCB_TST, UNDEF_WORD_DISP): |
| /* This tried to be relaxed, but didn't manage it, it now needs a |
| fix */ |
| wordify_scb (buffer, &disp_size, &inst_size); |
| |
| /* Make a reloc */ |
| fix_new (fragP, |
| fragP->fr_fix + inst_size, |
| 4, |
| fragP->fr_symbol, |
| fragP->fr_offset, |
| 0, |
| R_H8500_PCREL16); |
| |
| fragP->fr_fix += disp_size + inst_size; |
| fragP->fr_var = 0; |
| return; |
| break; |
| default: |
| abort (); |
| } |
| if (inst_size) |
| { |
| /* Get the address of the end of the instruction */ |
| int next_inst = fragP->fr_fix + fragP->fr_address + disp_size + inst_size; |
| int targ_addr = (S_GET_VALUE (fragP->fr_symbol) + |
| fragP->fr_offset); |
| int disp = targ_addr - next_inst; |
| |
| md_number_to_chars (buffer + inst_size, disp, disp_size); |
| fragP->fr_fix += disp_size + inst_size; |
| fragP->fr_var = 0; |
| } |
| } |
| |
| valueT |
| md_section_align (seg, size) |
| segT seg ; |
| valueT size; |
| { |
| return ((size + (1 << section_alignment[(int) seg]) - 1) |
| & (-1 << section_alignment[(int) seg])); |
| |
| } |
| |
| void |
| md_apply_fix (fixP, val) |
| fixS *fixP; |
| long val; |
| { |
| char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; |
| |
| if (fixP->fx_r_type == 0) |
| { |
| fixP->fx_r_type = fixP->fx_size == 4 ? R_H8500_IMM32 : R_H8500_IMM16; |
| } |
| |
| switch (fixP->fx_r_type) |
| { |
| |
| case R_H8500_IMM8: |
| case R_H8500_PCREL8: |
| *buf++ = val; |
| break; |
| case R_H8500_IMM16: |
| case R_H8500_LOW16: |
| case R_H8500_PCREL16: |
| *buf++ = (val >> 8); |
| *buf++ = val; |
| break; |
| case R_H8500_HIGH8: |
| *buf++ = val >> 16; |
| break; |
| case R_H8500_HIGH16: |
| *buf++ = val >> 24; |
| *buf++ = val >> 16; |
| break; |
| case R_H8500_IMM24: |
| *buf++ = (val >> 16); |
| *buf++ = (val >> 8); |
| *buf++ = val; |
| break; |
| case R_H8500_IMM32: |
| *buf++ = (val >> 24); |
| *buf++ = (val >> 16); |
| *buf++ = (val >> 8); |
| *buf++ = val; |
| break; |
| default: |
| abort (); |
| |
| } |
| } |
| |
| /* |
| called just before address relaxation, return the length |
| by which a fragment must grow to reach it's destination |
| */ |
| int |
| md_estimate_size_before_relax (fragP, segment_type) |
| register fragS *fragP; |
| register segT segment_type; |
| { |
| int what = GET_WHAT (fragP->fr_subtype); |
| |
| switch (fragP->fr_subtype) |
| { |
| default: |
| abort (); |
| case C (BRANCH, UNDEF_BYTE_DISP): |
| case C (SCB_F, UNDEF_BYTE_DISP): |
| case C (SCB_TST, UNDEF_BYTE_DISP): |
| /* used to be a branch to somewhere which was unknown */ |
| if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type) |
| { |
| /* Got a symbol and it's defined in this segment, become byte |
| sized - maybe it will fix up */ |
| fragP->fr_subtype = C (what, BYTE_DISP); |
| fragP->fr_var = md_relax_table[C (what, BYTE_DISP)].rlx_length; |
| } |
| else |
| { |
| /* Its got a segment, but its not ours, so it will always be long */ |
| fragP->fr_subtype = C (what, UNDEF_WORD_DISP); |
| fragP->fr_var = md_relax_table[C (what, WORD_DISP)].rlx_length; |
| return md_relax_table[C (what, WORD_DISP)].rlx_length; |
| } |
| } |
| return fragP->fr_var; |
| } |
| |
| /* Put number into target byte order */ |
| |
| void |
| md_number_to_chars (ptr, use, nbytes) |
| char *ptr; |
| valueT use; |
| int nbytes; |
| { |
| number_to_chars_bigendian (ptr, use, nbytes); |
| } |
| |
| long |
| md_pcrel_from (fixP) |
| fixS *fixP; |
| { |
| return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; |
| } |
| |
| /*ARGSUSED*/ |
| void |
| tc_coff_symbol_emit_hook (ignore) |
| symbolS *ignore; |
| { |
| } |
| |
| short |
| tc_coff_fix2rtype (fix_ptr) |
| fixS *fix_ptr; |
| { |
| if (fix_ptr->fx_r_type == RELOC_32) |
| { |
| /* cons likes to create reloc32's whatever the size of the reloc.. |
| */ |
| switch (fix_ptr->fx_size) |
| { |
| case 2: |
| return R_H8500_IMM16; |
| break; |
| case 1: |
| return R_H8500_IMM8; |
| break; |
| default: |
| abort (); |
| } |
| } |
| return fix_ptr->fx_r_type; |
| } |
| |
| void |
| tc_reloc_mangle (fix_ptr, intr, base) |
| fixS *fix_ptr; |
| struct internal_reloc *intr; |
| bfd_vma base; |
| |
| { |
| symbolS *symbol_ptr; |
| |
| symbol_ptr = fix_ptr->fx_addsy; |
| |
| /* If this relocation is attached to a symbol then it's ok |
| to output it */ |
| if (fix_ptr->fx_r_type == RELOC_32) |
| { |
| /* cons likes to create reloc32's whatever the size of the reloc.. |
| */ |
| switch (fix_ptr->fx_size) |
| { |
| case 2: |
| intr->r_type = R_IMM16; |
| break; |
| case 1: |
| intr->r_type = R_IMM8; |
| break; |
| default: |
| abort (); |
| } |
| } |
| else |
| { |
| intr->r_type = fix_ptr->fx_r_type; |
| } |
| |
| intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base; |
| intr->r_offset = fix_ptr->fx_offset; |
| |
| /* Turn the segment of the symbol into an offset. */ |
| if (symbol_ptr) |
| { |
| symbolS *dot; |
| |
| dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot; |
| if (dot) |
| { |
| /* intr->r_offset -= |
| segment_info[S_GET_SEGMENT(symbol_ptr)].scnhdr.s_paddr;*/ |
| intr->r_offset += S_GET_VALUE (symbol_ptr); |
| intr->r_symndx = dot->sy_number; |
| } |
| else |
| { |
| intr->r_symndx = symbol_ptr->sy_number; |
| } |
| |
| } |
| else |
| { |
| intr->r_symndx = -1; |
| } |
| |
| } |
| |
| |
| |
| int |
| start_label (ptr) |
| char *ptr; |
| { |
| /* Check for :s.w */ |
| if (isalpha (ptr[1]) && ptr[2] == '.') |
| return 0; |
| /* Check for :s */ |
| if (isalpha (ptr[1]) && !isalpha (ptr[2])) |
| return 0; |
| return 1; |
| } |
| |
| |
| int |
| tc_coff_sizemachdep (frag) |
| fragS *frag; |
| { |
| return md_relax_table[frag->fr_subtype].rlx_length; |
| } |
| |
| /* end of tc-h8500.c */ |
| |