1 /* tc-h8300.c -- Assemble code for the Hitachi h8/300
2 Copyright (C) 1991 Free Software Foundation.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
22 Written By Steve Chamberlain
29 #include "h8300-opcode.h"
32 char comment_chars[] = { ';',0 };
34 /* This table describes all the machine specific pseudo-ops the assembler
35 has to support. The fields are:
36 pseudo-op name without dot
37 function to call to execute this pseudo-op
38 Integer arg to pass to the function
40 const pseudo_typeS md_pseudo_table[] = {
46 const char EXP_CHARS[] = "eE";
48 /* Chars that mean this number is a floating point constant */
51 char FLT_CHARS[] = "rRsSfFdDxXpP";
54 const relax_typeS md_relax_table[1];
57 static struct hash_control *opcode_hash_control; /* Opcode mnemonics */
58 static struct hash_control *register_hash_control; /* Register name hash table */
62 This function is called once, at assembler startup time. This should
63 set up all the tables, etc that the MD part of the assembler needs
66 reloc_howto_type *r16;
68 reloc_howto_type *r8ff;
69 reloc_howto_type *r8pcrel;
73 bfd_arch_info_struct_type *ai;
74 const struct h8_opcode *opcode;
76 opcode_hash_control = hash_new();
77 for (opcode = h8_opcodes; opcode->name; opcode++) {
78 hash_insert(opcode_hash_control, opcode->name, (char *)opcode);
81 ai = bfd_lookup_arch(bfd_arch_h8300,0);
83 r16 = ai->reloc_type_lookup(ai, BFD_RELOC_16);
84 r8 = ai->reloc_type_lookup(ai, BFD_RELOC_8);
85 r8ff = ai->reloc_type_lookup(ai, BFD_RELOC_8_FFnn);
86 r8pcrel = ai->reloc_type_lookup(ai, BFD_RELOC_8_PCREL);
108 WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
117 op_enum_type r8_sord[] = {RS8, RD8};
118 op_enum_type r16_sord[] = {RS16, RD16};
119 op_enum_type rind_sord[] = {RSIND, RDIND};
120 op_enum_type abs_sord[2] = {ABS16SRC, ABS16DST};
121 op_enum_type disp_sord[] = {DISPSRC, DISPDST};
122 /* try and parse a reg name, returns number of chars consumed */
123 int DEFUN(parse_reg,(src, mode, reg, dst),
125 op_enum_type *mode AND
126 unsigned int *reg AND
129 if (src[0] == 's' && src[1] == 'p') {
130 *mode = r16_sord[dst];
134 if (src[0] == 'c' && src[1] == 'c' && src[2] == 'r') {
139 if (src[0] == 'f' && src[1] == 'p') {
140 *mode = r16_sord[dst];
145 if (src[1] >= '0' && src[1] <= '7') {
147 *mode = r8_sord[dst];
148 *reg = (src[1] - '0') + 8;
152 *mode = r8_sord[dst];
153 *reg = (src[1] - '0') ;
156 *mode = r16_sord[dst];
157 *reg = (src[1] - '0');
165 DEFUN(parse_exp,(s, op),
169 char *save = input_line_pointer;
172 input_line_pointer = s;
174 new = input_line_pointer;
175 input_line_pointer = save;
186 as_bad("Missing operand");
189 as_bad("Don't understand operand of type %s", segment_name (seg));
196 DEFUN(get_operand,(ptr, op, dst),
207 while (*src == ' ') src++;
208 len = parse_reg(src, &op->mode, &op->reg, dst);
218 len = parse_reg(src, &mode, &num, dst);
219 if (len == 0 || mode != r16_sord[dst]) {
220 as_bad("@- needs word register");
227 if (*src == '(' && ')') {
230 src = parse_exp(src, &op->exp);
234 op->mode = abs_sord[dst];
239 as_bad("expected @(exp, reg16)");
242 len = parse_reg(src, &mode, &op->reg, dst);
243 if (len == 0 || mode != r16_sord[dst])
245 as_bad("expected @(exp, reg16)");
247 op->mode = disp_sord[dst];
249 if (*src != ')' && '(') {
250 as_bad("expected @(exp, reg16)");
257 len = parse_reg(src, &mode, &num, dst);
264 as_bad("@Rn+ needs word register");
271 if (mode != r16_sord[dst]) {
272 as_bad("@Rn needs word register");
274 op->mode =rind_sord[dst];
280 /* must be a symbol */
281 op->mode = abs_sord[dst];
282 *ptr = parse_exp(src, &op->exp);
291 *ptr = parse_exp(src, &op->exp);
295 *ptr = parse_exp(src, &op->exp);
300 /* This is the guts of the machine-dependent assembler. STR points to a
301 machine dependent instruction. This funciton is supposed to emit
302 the frags/bytes it assembles to.
307 DEFUN(md_assemble,(str),
312 struct h8_opcode * opcode;
313 /* Drop leading whitespace */
318 /* find the op code end */
319 for (op_start = op_end = str;
320 *op_end != 0 && *op_end != ' ';
324 if (op_end == op_start) {
325 as_bad("can't find opcode ");
328 opcode = (struct h8_opcode *) hash_find(opcode_hash_control,
331 if (opcode == NULL) {
332 as_bad("unknown opcode");
341 struct h8_op operand[2];
342 char *ptr = op_end+1;
343 if (opcode->noperands)
344 get_operand(& ptr, &operand[0],0);
345 else operand[0].mode = 0;
346 if (opcode->noperands==2) {
347 if (*ptr == ',') ptr++;
348 get_operand(& ptr, &operand[1], 1);
350 else operand[1].mode = 0;
355 struct h8_opcode *this_try ;
357 for (j = 0; j < opcode->nopcodes && !found; j++) {
358 this_try = opcode + j;
359 for (i = 0; i < opcode->noperands; i++) {
360 op_enum_type op = (this_try->args.nib[i]) & ~(B30|B31);
381 dispreg = operand[i].reg;
391 if (operand[i].mode != op) goto fail;
397 if (operand[i].mode != IMM16) goto fail;
401 if (operand[i].mode != ABS16SRC) goto fail;
405 if (operand[i].mode != ABS16DST) goto fail;
414 as_bad("illegal operands for opcode");
417 /* Now we know what sort of opcodes etc, lets build the bytes -
418 actually we know how big the instruction will be too. So we
422 char *output = frag_more(this_try->length);
423 char *output_ptr = output;
424 op_enum_type *nibble_ptr = this_try->data.nib;
430 while (*nibble_ptr != E) {
432 for (nibble = 0; nibble <2; nibble++) {
433 c = *nibble_ptr & ~(B30|B31);
440 case 2: case 3: case 4: case 5: case 6:
441 case 7: case 8: case 9: case 10: case 11:
442 case 12: case 13: case 14: case 15:
449 /* if no symbol then put value in place */
450 if (operand[0].exp.X_add_symbol == 0) {
451 operand[0].mode = 0; /* stop it making a fix */
452 *output_ptr++ = (operand[0].exp.X_add_number);
460 /* if no symbol then put value in place */
461 if (operand[1].exp.X_add_symbol == 0) {
462 operand[1].mode = 0; /* stop it making a fix */
463 *output_ptr++ =(operand[1].exp.X_add_number)>>8;
464 *output_ptr++ = (operand[1].exp.X_add_number);
473 if (operand[0].exp.X_add_symbol == 0) {
474 operand[0].mode = 0; /* stop it making a fix */
475 nib = (operand[0].exp.X_add_number);
477 else as_bad("can't have symbol for bit number");
482 /* if no symbol then put value in place */
483 if (operand[0].exp.X_add_symbol == 0) {
484 operand[0].mode = 0; /* stop it making a fix */
485 *output_ptr++ =(operand[0].exp.X_add_number)>>8;
486 *output_ptr++ = (operand[0].exp.X_add_number);
517 nib = operand[1].reg;
524 if (*nibble_ptr & B31) nib|=0x8;
526 *output_ptr = nib << 4;
537 /* output any fixes */
540 for (i = 0; i < 2; i++) {
541 switch (operand[i].mode) {
548 operand[i].exp.X_add_symbol,
549 operand[i].exp.X_subtract_symbol,
550 operand[i].exp.X_add_number,
562 operand[i].exp.X_add_symbol,
563 operand[i].exp.X_subtract_symbol,
564 operand[i].exp.X_add_number,
589 DEFUN(tc_crawl_symbol_chain, (headers),
590 object_headers *headers)
592 printf("call to tc_crawl_symbol_chain \n");
595 symbolS *DEFUN(md_undefined_symbol,(name),
602 DEFUN(tc_headers_hook,(headers),
603 object_headers *headers)
605 printf("call to tc_headers_hook \n");
612 /* Various routines to kill one day */
614 char *md_atof () { printf("call to md_atof \n"); abort(); }
615 int md_parse_option () { printf("call to md_parse_option \n"); abort(); }
617 int md_short_jump_size;
619 void tc_aout_fix_to_chars () { printf("call to tc_aout_fix_to_chars \n");
621 void md_create_long_jump () { printf("call to md_create_long_jump \n");
623 void md_convert_frag () { printf("call to md_convert_frag \n"); abort(); }
626 DEFUN(md_section_align,(seg, size),
630 return((size + (1 << section_alignment[(int) seg]) - 1) & (-1 << section_alignment[(int) seg]));
634 void md_apply_fix () { printf("call to md_apply_fix \n"); abort(); }
636 void DEFUN(md_operand, (expressionP),expressionS *expressionP)
639 int md_long_jump_size;
640 int md_estimate_size_before_relax () { printf("call tomd_estimate_size_before_relax \n"); abort(); }
641 /* Put number into target byte order */
642 void DEFUN(md_number_to_chars,(ptr, use, nbytes),
648 case 4: *ptr++ = (use >> 24) & 0xff;
649 case 3: *ptr++ = (use >> 16) & 0xff;
650 case 2: *ptr++ = (use >> 8) & 0xff;
651 case 1: *ptr++ = (use >> 0) & 0xff;
658 long md_pcrel_from () { printf("call to md_pcrel_from \n"); abort(); }
659 void md_create_short_jump () { printf("call to md_create_short_jump \n");
662 void tc_coff_symbol_emit_hook() { }