1 /* tc-z80.c -- Assemble code for the Zilog Z80 and ASCII R800
2 Copyright (C) 2005-2016 Free Software Foundation, Inc.
3 Contributed by Arnold Metselaar <arnold_m@operamail.com>
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 #include "safe-ctype.h"
26 /* Exported constants. */
27 const char comment_chars[] = ";\0";
28 const char line_comment_chars[] = "#;\0";
29 const char line_separator_chars[] = "\0";
30 const char EXP_CHARS[] = "eE\0";
31 const char FLT_CHARS[] = "RrFf\0";
33 /* For machine specific options. */
34 const char * md_shortopts = ""; /* None yet. */
38 OPTION_MACH_Z80 = OPTION_MD_BASE,
53 struct option md_longopts[] =
55 { "z80", no_argument, NULL, OPTION_MACH_Z80},
56 { "r800", no_argument, NULL, OPTION_MACH_R800},
57 { "ignore-undocumented-instructions", no_argument, NULL, OPTION_MACH_IUD },
58 { "Wnud", no_argument, NULL, OPTION_MACH_IUD },
59 { "warn-undocumented-instructions", no_argument, NULL, OPTION_MACH_WUD },
60 { "Wud", no_argument, NULL, OPTION_MACH_WUD },
61 { "forbid-undocumented-instructions", no_argument, NULL, OPTION_MACH_FUD },
62 { "Fud", no_argument, NULL, OPTION_MACH_FUD },
63 { "ignore-unportable-instructions", no_argument, NULL, OPTION_MACH_IUP },
64 { "Wnup", no_argument, NULL, OPTION_MACH_IUP },
65 { "warn-unportable-instructions", no_argument, NULL, OPTION_MACH_WUP },
66 { "Wup", no_argument, NULL, OPTION_MACH_WUP },
67 { "forbid-unportable-instructions", no_argument, NULL, OPTION_MACH_FUP },
68 { "Fup", no_argument, NULL, OPTION_MACH_FUP },
70 { NULL, no_argument, NULL, 0 }
73 size_t md_longopts_size = sizeof (md_longopts);
75 extern int coff_flags;
76 /* Instruction classes that silently assembled. */
77 static int ins_ok = INS_Z80 | INS_UNDOC;
78 /* Instruction classes that generate errors. */
79 static int ins_err = INS_R800;
80 /* Instruction classes actually used, determines machine type. */
81 static int ins_used = INS_Z80;
84 md_parse_option (int c, char* arg ATTRIBUTE_UNUSED)
94 case OPTION_MACH_R800:
95 ins_ok = INS_Z80 | INS_UNDOC | INS_R800;
100 ins_err &= ~INS_UNDOC;
102 case OPTION_MACH_IUP:
103 ins_ok |= INS_UNDOC | INS_UNPORT;
104 ins_err &= ~(INS_UNDOC | INS_UNPORT);
106 case OPTION_MACH_WUD:
107 if ((ins_ok & INS_R800) == 0)
109 ins_ok &= ~(INS_UNDOC|INS_UNPORT);
110 ins_err &= ~INS_UNDOC;
113 case OPTION_MACH_WUP:
114 ins_ok &= ~INS_UNPORT;
115 ins_err &= ~(INS_UNDOC|INS_UNPORT);
117 case OPTION_MACH_FUD:
118 if ((ins_ok & INS_R800) == 0)
120 ins_ok &= (INS_UNDOC | INS_UNPORT);
121 ins_err |= INS_UNDOC | INS_UNPORT;
124 case OPTION_MACH_FUP:
125 ins_ok &= ~INS_UNPORT;
126 ins_err |= INS_UNPORT;
134 md_show_usage (FILE * f)
137 CPU model/instruction set options:\n\
139 -z80\t\t assemble for Z80\n\
140 -ignore-undocumented-instructions\n\
142 \tsilently assemble undocumented Z80-instructions that work on R800\n\
143 -ignore-unportable-instructions\n\
145 \tsilently assemble all undocumented Z80-instructions\n\
146 -warn-undocumented-instructions\n\
148 \tissue warnings for undocumented Z80-instructions that work on R800\n\
149 -warn-unportable-instructions\n\
151 \tissue warnings for other undocumented Z80-instructions\n\
152 -forbid-undocumented-instructions\n\
154 \ttreat all undocumented z80-instructions as errors\n\
155 -forbid-unportable-instructions\n\
157 \ttreat undocumented z80-instructions that do not work on R800 as errors\n\
158 -r800\t assemble for R800\n\n\
159 Default: -z80 -ignore-undocument-instructions -warn-unportable-instructions.\n");
162 static symbolS * zero;
169 #define R_STACKABLE (0x80)
170 #define R_ARITH (0x40)
173 #define R_INDEX (R_IX | R_IY)
182 #define REG_F (6 | 8)
186 #define REG_AF (3 | R_STACKABLE)
187 #define REG_BC (0 | R_STACKABLE | R_ARITH)
188 #define REG_DE (1 | R_STACKABLE | R_ARITH)
189 #define REG_HL (2 | R_STACKABLE | R_ARITH)
190 #define REG_IX (REG_HL | R_IX)
191 #define REG_IY (REG_HL | R_IY)
192 #define REG_SP (3 | R_ARITH)
194 static const struct reg_entry regtable[] =
209 {"ixh",REG_H | R_IX },
210 {"ixl",REG_L | R_IX },
212 {"iyh",REG_H | R_IY },
213 {"iyl",REG_L | R_IY },
219 #define BUFLEN 8 /* Large enough for any keyword. */
224 expressionS nul, reg;
226 unsigned int i, j, k;
229 reg.X_op = O_register;
231 reg.X_add_symbol = reg.X_op_symbol = 0;
232 for ( i = 0 ; i < ARRAY_SIZE ( regtable ) ; ++i )
234 reg.X_add_number = regtable[i].number;
235 k = strlen ( regtable[i].name );
239 for ( j = ( 1<<k ) ; j ; --j )
241 for ( k = 0 ; regtable[i].name[k] ; ++k )
243 buf[k] = ( j & ( 1<<k ) ) ? TOUPPER ( regtable[i].name[k] ) : regtable[i].name[k];
245 symbolS * psym = symbol_find_or_make(buf);
246 S_SET_SEGMENT(psym, reg_section);
247 symbol_set_value_expression(psym, ®);
251 p = input_line_pointer;
252 input_line_pointer = "0";
255 input_line_pointer = p;
256 zero = make_expr_symbol (& nul);
257 /* We do not use relaxation (yet). */
266 if (ins_used & (INS_UNPORT | INS_R800))
267 ins_used |= INS_UNDOC;
272 mach_type = bfd_mach_z80strict;
274 case INS_Z80|INS_UNDOC:
275 mach_type = bfd_mach_z80;
277 case INS_Z80|INS_UNDOC|INS_UNPORT:
278 mach_type = bfd_mach_z80full;
280 case INS_Z80|INS_UNDOC|INS_R800:
281 mach_type = bfd_mach_r800;
287 bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach_type);
291 skip_space (const char *s)
293 while (*s == ' ' || *s == '\t')
298 /* A non-zero return-value causes a continue in the
299 function read_a_source_file () in ../read.c. */
301 z80_start_line_hook (void)
306 /* Convert one character constants. */
307 for (p = input_line_pointer; *p && *p != '\n'; ++p)
312 if (p[1] != 0 && p[1] != '\'' && p[2] == '\'')
314 snprintf (buf, 4, "%3d", (unsigned char)p[1]);
321 for (quote = *p++; quote != *p && '\n' != *p; ++p)
325 as_bad (_("-- unterminated string"));
326 ignore_rest_of_line ();
332 /* Check for <label>[:] [.](EQU|DEFL) <value>. */
333 if (is_name_beginner (*input_line_pointer))
336 char c, *rest, *line_start;
339 line_start = input_line_pointer;
343 c = get_symbol_name (&name);
344 rest = input_line_pointer + 1;
348 if (*rest == ' ' || *rest == '\t')
352 if (strncasecmp (rest, "EQU", 3) == 0)
354 else if (strncasecmp (rest, "DEFL", 4) == 0)
358 if (len && (!ISALPHA(rest[len]) ) )
360 /* Handle assignment here. */
361 if (line_start[-1] == '\n')
363 bump_line_counters ();
366 input_line_pointer = rest + len - 1;
367 /* Allow redefining with "DEFL" (len == 4), but not with "EQU". */
368 equals (name, len == 4);
373 /* Restore line and pointer. */
374 (void) restore_line_pointer (c);
375 input_line_pointer = line_start;
382 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
388 md_atof (int type ATTRIBUTE_UNUSED, char *litP ATTRIBUTE_UNUSED,
389 int *sizeP ATTRIBUTE_UNUSED)
391 return _("floating point numbers are not implemented");
395 md_section_align (segT seg ATTRIBUTE_UNUSED, valueT size)
401 md_pcrel_from (fixS * fixp)
403 return fixp->fx_where +
404 fixp->fx_frag->fr_address + 1;
407 typedef const char * (asfunc)(char, char, const char*);
409 typedef struct _table_t
417 /* Compares the key for structs that start with a char * to the key. */
419 key_cmp (const void * a, const void * b)
421 const char *str_a, *str_b;
423 str_a = *((const char**)a);
424 str_b = *((const char**)b);
425 return strcmp (str_a, str_b);
429 const char *key = buf;
431 /* Prevent an error on a line from also generating
432 a "junk at end of line" error message. */
433 static char err_flag;
436 error (const char * message)
438 as_bad ("%s", message);
445 error (_("illegal operand"));
449 wrong_mach (int ins_type)
456 p = "undocumented instruction";
459 p = "instruction does not work on R800";
462 p = "instruction only works R800";
465 p = 0; /* Not reachable. */
468 if (ins_type & ins_err)
471 as_warn ("%s", _(p));
475 check_mach (int ins_type)
477 if ((ins_type & ins_ok) == 0)
478 wrong_mach (ins_type);
479 ins_used |= ins_type;
482 /* Check whether an expression is indirect. */
484 is_indir (const char *s)
490 /* Indirection is indicated with parentheses. */
493 for (p = s, depth = 0; *p && *p != ','; ++p)
499 for (quote = *p++; quote != *p && *p != '\n'; ++p)
500 if (*p == '\\' && p[1])
510 p = skip_space (p + 1);
516 error (_("mismatched parentheses"));
522 error (_("mismatched parentheses"));
527 /* Check whether a symbol involves a register. */
529 contains_register(symbolS *sym)
533 expressionS * ex = symbol_get_value_expression(sym);
534 return (O_register == ex->X_op)
535 || (ex->X_add_symbol && contains_register(ex->X_add_symbol))
536 || (ex->X_op_symbol && contains_register(ex->X_op_symbol));
542 /* Parse general expression, not loooking for indexed adressing. */
544 parse_exp_not_indexed (const char *s, expressionS *op)
550 op->X_md = indir = is_indir (p);
551 input_line_pointer = (char*) s ;
556 error (_("missing operand"));
559 error (_("bad expression syntax"));
564 return input_line_pointer;
567 /* Parse expression, change operator to O_md1 for indexed addressing*/
569 parse_exp (const char *s, expressionS *op)
571 const char* res = parse_exp_not_indexed (s, op);
576 if (op->X_md && (O_register == symbol_get_value_expression(op->X_add_symbol)->X_op))
578 int rnum = symbol_get_value_expression(op->X_add_symbol)->X_add_number;
579 if ( ((REG_IX != rnum) && (REG_IY != rnum)) || contains_register(op->X_op_symbol) )
585 if (O_subtract == op->X_op)
588 minus.X_op = O_uminus;
589 minus.X_add_number = 0;
590 minus.X_add_symbol = op->X_op_symbol;
591 minus.X_op_symbol = 0;
592 op->X_op_symbol = make_expr_symbol(&minus);
595 symbol_get_value_expression(op->X_op_symbol)->X_add_number += op->X_add_number;
596 op->X_add_number = rnum;
597 op->X_add_symbol = op->X_op_symbol;
604 if ( op->X_md && ((REG_IX == op->X_add_number)||(REG_IY == op->X_add_number)) )
606 op->X_add_symbol = zero;
616 /* Condition codes, including some synonyms provided by HiTech zas. */
617 static const struct reg_entry cc_tab[] =
635 /* Parse condition code. */
637 parse_cc (const char *s, char * op)
641 struct reg_entry * cc_p;
643 for (i = 0; i < BUFLEN; ++i)
645 if (!ISALPHA (s[i])) /* Condition codes consist of letters only. */
647 buf[i] = TOLOWER (s[i]);
651 && ((s[i] == 0) || (s[i] == ',')))
654 cc_p = bsearch (&key, cc_tab, ARRAY_SIZE (cc_tab),
655 sizeof (cc_tab[0]), key_cmp);
672 emit_insn (char prefix, char opcode, const char * args)
687 void z80_cons_fix_new (fragS *frag_p, int offset, int nbytes, expressionS *exp)
689 bfd_reloc_code_real_type r[4] =
697 if (nbytes < 1 || nbytes > 4)
699 as_bad (_("unsupported BFD relocation size %u"), nbytes);
703 fix_new_exp (frag_p, offset, nbytes, exp, 0, r[nbytes-1]);
708 emit_byte (expressionS * val, bfd_reloc_code_real_type r_type)
714 *p = val->X_add_number;
715 if ( contains_register(val->X_add_symbol) || contains_register(val->X_op_symbol) )
719 else if ((r_type == BFD_RELOC_8_PCREL) && (val->X_op == O_constant))
721 as_bad (_("cannot make a relative jump to an absolute location"));
723 else if (val->X_op == O_constant)
726 hi = (BFD_RELOC_8 == r_type) ? 255 : 127;
728 if ((val->X_add_number < lo) || (val->X_add_number > hi))
730 if (r_type == BFD_RELOC_Z80_DISP8)
731 as_bad (_("offset too large"));
733 as_warn (_("overflow"));
738 fix_new_exp (frag_now, p - frag_now->fr_literal, 1, val,
739 (r_type == BFD_RELOC_8_PCREL) ? TRUE : FALSE, r_type);
740 /* FIXME : Process constant offsets immediately. */
745 emit_word (expressionS * val)
750 if ( (val->X_op == O_register)
751 || (val->X_op == O_md1)
752 || contains_register(val->X_add_symbol)
753 || contains_register(val->X_op_symbol) )
757 *p = val->X_add_number;
758 p[1] = (val->X_add_number>>8);
759 if (val->X_op != O_constant)
760 fix_new_exp (frag_now, p - frag_now->fr_literal, 2,
761 val, FALSE, BFD_RELOC_16);
766 emit_mx (char prefix, char opcode, int shift, expressionS * arg)
767 /* The operand m may be r, (hl), (ix+d), (iy+d),
768 if 0 == prefix m may also be ixl, ixh, iyl, iyh. */
773 rnum = arg->X_add_number;
789 if ((prefix == 0) && (rnum & R_INDEX))
791 prefix = (rnum & R_IX) ? 0xDD : 0xFD;
792 check_mach (INS_UNDOC);
801 q = frag_more (prefix ? 2 : 1);
804 * q ++ = opcode + (rnum << shift);
808 *q++ = (rnum & R_IX) ? 0xDD : 0xFD;
809 *q = (prefix) ? prefix : (opcode + (6 << shift));
811 expressionS offset = *arg;
812 offset.X_op = O_symbol;
813 offset.X_add_number = 0;
814 emit_byte (&offset, BFD_RELOC_Z80_DISP8);
819 *q = opcode+(6<<shift);
827 /* The operand m may be r, (hl), (ix+d), (iy+d),
828 if 0 = prefix m may also be ixl, ixh, iyl, iyh. */
830 emit_m (char prefix, char opcode, const char *args)
835 p = parse_exp (args, &arg_m);
840 emit_mx (prefix, opcode, 0, &arg_m);
848 /* The operand m may be as above or one of the undocumented
849 combinations (ix+d),r and (iy+d),r (if unportable instructions
852 emit_mr (char prefix, char opcode, const char *args)
854 expressionS arg_m, arg_r;
857 p = parse_exp (args, & arg_m);
864 p = parse_exp (p + 1, & arg_r);
866 if ((arg_r.X_md == 0)
867 && (arg_r.X_op == O_register)
868 && (arg_r.X_add_number < 8))
869 opcode += arg_r.X_add_number-6; /* Emit_mx () will add 6. */
875 check_mach (INS_UNPORT);
878 emit_mx (prefix, opcode, 0, & arg_m);
887 emit_sx (char prefix, char opcode, expressionS * arg_p)
895 emit_mx (prefix, opcode, 0, arg_p);
902 q = frag_more (prefix ? 2 : 1);
906 emit_byte (arg_p, BFD_RELOC_8);
911 /* The operand s may be r, (hl), (ix+d), (iy+d), n. */
913 emit_s (char prefix, char opcode, const char *args)
918 p = parse_exp (args, & arg_s);
919 emit_sx (prefix, opcode, & arg_s);
924 emit_call (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
927 const char *p; char *q;
929 p = parse_exp_not_indexed (args, &addr);
941 /* Operand may be rr, r, (hl), (ix+d), (iy+d). */
943 emit_incdec (char prefix, char opcode, const char * args)
947 const char *p; char *q;
949 p = parse_exp (args, &operand);
950 rnum = operand.X_add_number;
952 && (operand.X_op == O_register)
955 q = frag_more ((rnum & R_INDEX) ? 2 : 1);
957 *q++ = (rnum & R_IX) ? 0xDD : 0xFD;
958 *q = prefix + ((rnum & 3) << 4);
962 if ((operand.X_op == O_md1) || (operand.X_op == O_register))
963 emit_mx (0, opcode, 3, & operand);
971 emit_jr (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
977 p = parse_exp_not_indexed (args, &addr);
984 emit_byte (&addr, BFD_RELOC_8_PCREL);
990 emit_jp (char prefix, char opcode, const char * args)
997 p = parse_exp_not_indexed (args, & addr);
1000 rnum = addr.X_add_number;
1001 if ((O_register == addr.X_op) && (REG_HL == (rnum & ~R_INDEX)))
1003 q = frag_more ((rnum & R_INDEX) ? 2 : 1);
1005 *q++ = (rnum & R_IX) ? 0xDD : 0xFD;
1021 emit_im (char prefix, char opcode, const char * args)
1027 p = parse_exp (args, & mode);
1028 if (mode.X_md || (mode.X_op != O_constant))
1031 switch (mode.X_add_number)
1035 ++mode.X_add_number;
1040 *q = opcode + 8*mode.X_add_number;
1049 emit_pop (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1055 p = parse_exp (args, & regp);
1057 && (regp.X_op == O_register)
1058 && (regp.X_add_number & R_STACKABLE))
1062 rnum = regp.X_add_number;
1066 *q++ = (rnum&R_IX)?0xDD:0xFD;
1070 *q = opcode + ((rnum & 3) << 4);
1079 emit_retcc (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1084 p = parse_cc (args, &cc);
1090 return p ? p : args;
1094 emit_adc (char prefix, char opcode, const char * args)
1101 p = parse_exp (args, &term);
1104 error (_("bad instruction syntax"));
1108 if ((term.X_md) || (term.X_op != O_register))
1111 switch (term.X_add_number)
1114 p = emit_s (0, prefix, p);
1117 p = parse_exp (p, &term);
1118 if ((!term.X_md) && (term.X_op == O_register))
1120 rnum = term.X_add_number;
1121 if (R_ARITH == (rnum & (R_ARITH | R_INDEX)))
1125 *q = opcode + ((rnum & 3) << 4);
1137 emit_add (char prefix, char opcode, const char * args)
1144 p = parse_exp (args, &term);
1147 error (_("bad instruction syntax"));
1151 if ((term.X_md) || (term.X_op != O_register))
1154 switch (term.X_add_number & ~R_INDEX)
1157 p = emit_s (0, prefix, p);
1160 lhs = term.X_add_number;
1161 p = parse_exp (p, &term);
1162 if ((!term.X_md) && (term.X_op == O_register))
1164 rhs = term.X_add_number;
1166 && ((rhs == lhs) || ((rhs & ~R_INDEX) != REG_HL)))
1168 q = frag_more ((lhs & R_INDEX) ? 2 : 1);
1170 *q++ = (lhs & R_IX) ? 0xDD : 0xFD;
1171 *q = opcode + ((rhs & 3) << 4);
1183 emit_bit (char prefix, char opcode, const char * args)
1189 p = parse_exp (args, &b);
1191 error (_("bad instruction syntax"));
1193 bn = b.X_add_number;
1195 && (b.X_op == O_constant)
1200 /* Bit : no optional third operand. */
1201 p = emit_m (prefix, opcode + (bn << 3), p);
1203 /* Set, res : resulting byte can be copied to register. */
1204 p = emit_mr (prefix, opcode + (bn << 3), p);
1212 emit_jpcc (char prefix, char opcode, const char * args)
1217 p = parse_cc (args, & cc);
1218 if (p && *p++ == ',')
1219 p = emit_call (0, opcode + cc, p);
1221 p = (prefix == (char)0xC3)
1222 ? emit_jp (0xE9, prefix, args)
1223 : emit_call (0, prefix, args);
1228 emit_jrcc (char prefix, char opcode, const char * args)
1233 p = parse_cc (args, &cc);
1234 if (p && *p++ == ',')
1237 error (_("condition code invalid for jr"));
1239 p = emit_jr (0, opcode + cc, p);
1242 p = emit_jr (0, prefix, args);
1248 emit_ex (char prefix_in ATTRIBUTE_UNUSED,
1249 char opcode_in ATTRIBUTE_UNUSED, const char * args)
1253 char prefix, opcode;
1255 p = parse_exp_not_indexed (args, &op);
1259 error (_("bad instruction syntax"));
1263 prefix = opcode = 0;
1264 if (op.X_op == O_register)
1265 switch (op.X_add_number | (op.X_md ? 0x8000 : 0))
1268 if (TOLOWER (*p++) == 'a' && TOLOWER (*p++) == 'f')
1270 /* The scrubber changes '\'' to '`' in this context. */
1277 if (TOLOWER (*p++) == 'h' && TOLOWER (*p++) == 'l')
1281 p = parse_exp (p, & op);
1282 if (op.X_op == O_register
1284 && (op.X_add_number & ~R_INDEX) == REG_HL)
1287 if (R_INDEX & op.X_add_number)
1288 prefix = (R_IX & op.X_add_number) ? 0xDD : 0xFD;
1293 emit_insn (prefix, opcode, p);
1301 emit_in (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
1304 expressionS reg, port;
1308 p = parse_exp (args, ®);
1311 error (_("bad instruction syntax"));
1315 p = parse_exp (p, &port);
1317 && reg.X_op == O_register
1318 && (reg.X_add_number <= 7 || reg.X_add_number == REG_F)
1321 if (port.X_op != O_md1 && port.X_op != O_register)
1323 if (REG_A == reg.X_add_number)
1327 emit_byte (&port, BFD_RELOC_8);
1334 if (port.X_add_number == REG_C)
1336 if (reg.X_add_number == REG_F)
1337 check_mach (INS_UNDOC);
1342 *q = 0x40|((reg.X_add_number&7)<<3);
1355 emit_out (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
1358 expressionS reg, port;
1362 p = parse_exp (args, & port);
1365 error (_("bad instruction syntax"));
1368 p = parse_exp (p, ®);
1370 { ill_op (); return p; }
1371 /* Allow "out (c), 0" as unportable instruction. */
1372 if (reg.X_op == O_constant && reg.X_add_number == 0)
1374 check_mach (INS_UNPORT);
1375 reg.X_op = O_register;
1376 reg.X_add_number = 6;
1379 || reg.X_op != O_register
1380 || reg.X_add_number > 7)
1383 if (port.X_op != O_register && port.X_op != O_md1)
1385 if (REG_A == reg.X_add_number)
1389 emit_byte (&port, BFD_RELOC_8);
1396 if (REG_C == port.X_add_number)
1400 *q = 0x41 | (reg.X_add_number << 3);
1409 emit_rst (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1415 p = parse_exp_not_indexed (args, &addr);
1416 if (addr.X_op != O_constant)
1418 error ("rst needs constant address");
1422 if (addr.X_add_number & ~(7 << 3))
1427 *q = opcode + (addr.X_add_number & (7 << 3));
1433 emit_ldxhl (char prefix, char opcode, expressionS *src, expressionS *d)
1441 if (src->X_op == O_register)
1443 if (src->X_add_number>7)
1452 *q = opcode + src->X_add_number;
1454 emit_byte (d, BFD_RELOC_Z80_DISP8);
1467 emit_byte (d, BFD_RELOC_Z80_DISP8);
1468 emit_byte (src, BFD_RELOC_8);
1474 emit_ldreg (int dest, expressionS * src)
1481 /* 8 Bit ld group: */
1484 if (src->X_md == 0 && src->X_op == O_register && src->X_add_number == REG_A)
1488 *q = (dest == REG_I) ? 0x47 : 0x4F;
1495 if ((src->X_md) && src->X_op != O_register && src->X_op != O_md1)
1504 && src->X_op == O_register
1505 && (src->X_add_number == REG_BC || src->X_add_number == REG_DE))
1508 *q = 0x0A + ((src->X_add_number & 1) << 4);
1513 && src->X_op == O_register
1514 && (src->X_add_number == REG_R || src->X_add_number == REG_I))
1518 *q = (src->X_add_number == REG_I) ? 0x57 : 0x5F;
1526 emit_sx (0, 0x40 + (dest << 3), src);
1531 if ((src->X_md == 0)
1532 && (src->X_op == O_register)
1533 && (src->X_add_number & R_INDEX))
1536 emit_sx (0, 0x40 + (dest << 3), src);
1548 check_mach (INS_UNDOC);
1549 if (src-> X_op == O_register)
1551 rnum = src->X_add_number;
1552 if ((rnum & ~R_INDEX) < 8
1553 && ((rnum & R_INDEX) == (dest & R_INDEX)
1554 || ( (rnum & ~R_INDEX) != REG_H
1555 && (rnum & ~R_INDEX) != REG_L)))
1558 *q++ = (dest & R_IX) ? 0xDD : 0xFD;
1559 *q = 0x40 + ((dest & 0x07) << 3) + (rnum & 7);
1567 *q++ = (dest & R_IX) ? 0xDD : 0xFD;
1568 *q = 0x06 + ((dest & 0x07) << 3);
1569 emit_byte (src, BFD_RELOC_8);
1573 /* 16 Bit ld group: */
1576 && src->X_op == O_register
1577 && REG_HL == (src->X_add_number &~ R_INDEX))
1579 q = frag_more ((src->X_add_number & R_INDEX) ? 2 : 1);
1580 if (src->X_add_number & R_INDEX)
1581 *q++ = (src->X_add_number & R_IX) ? 0xDD : 0xFD;
1588 if (src->X_op == O_register || src->X_op == O_md1)
1590 q = frag_more (src->X_md ? 2 : 1);
1594 *q = 0x4B + ((dest & 3) << 4);
1597 *q = 0x01 + ((dest & 3) << 4);
1604 if (src->X_op == O_register || src->X_op == O_md1)
1606 q = frag_more ((dest & R_INDEX) ? 2 : 1);
1608 * q ++ = (dest & R_IX) ? 0xDD : 0xFD;
1609 *q = (src->X_md) ? 0x2A : 0x21;
1624 emit_ld (char prefix_in ATTRIBUTE_UNUSED, char opcode_in ATTRIBUTE_UNUSED,
1627 expressionS dst, src;
1630 char prefix, opcode;
1632 p = parse_exp (args, &dst);
1634 error (_("bad instruction syntax"));
1635 p = parse_exp (p, &src);
1641 expressionS dst_offset = dst;
1642 dst_offset.X_op = O_symbol;
1643 dst_offset.X_add_number = 0;
1644 emit_ldxhl ((dst.X_add_number & R_IX) ? 0xDD : 0xFD, 0x70,
1652 switch (dst.X_add_number)
1656 if (src.X_md == 0 && src.X_op == O_register && src.X_add_number == REG_A)
1659 *q = 0x02 + ( (dst.X_add_number & 1) << 4);
1665 emit_ldxhl (0, 0x70, &src, NULL);
1672 emit_ldreg (dst.X_add_number, &src);
1676 if (src.X_md != 0 || src.X_op != O_register)
1678 prefix = opcode = 0;
1679 switch (src.X_add_number)
1682 opcode = 0x32; break;
1683 case REG_BC: case REG_DE: case REG_SP:
1684 prefix = 0xED; opcode = 0x43 + ((src.X_add_number&3)<<4); break;
1686 opcode = 0x22; break;
1688 prefix = 0xDD; opcode = 0x22; break;
1690 prefix = 0xFD; opcode = 0x22; break;
1694 q = frag_more (prefix?2:1);
1707 emit_data (int size ATTRIBUTE_UNUSED)
1714 if (is_it_end_of_statement ())
1716 demand_empty_rest_of_line ();
1719 p = skip_space (input_line_pointer);
1723 if (*p == '\"' || *p == '\'')
1725 for (quote = *p, q = ++p, cnt = 0; *p && quote != *p; ++p, ++cnt)
1727 u = frag_more (cnt);
1730 as_warn (_("unterminated string"));
1732 p = skip_space (p+1);
1736 p = parse_exp (p, &exp);
1737 if (exp.X_op == O_md1 || exp.X_op == O_register)
1743 as_warn (_("parentheses ignored"));
1744 emit_byte (&exp, BFD_RELOC_8);
1748 while (*p++ == ',') ;
1749 input_line_pointer = (char *)(p-1);
1753 emit_mulub (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1757 p = skip_space (args);
1758 if (TOLOWER (*p++) != 'a' || *p++ != ',')
1764 reg = TOLOWER (*p++);
1771 check_mach (INS_R800);
1772 if (!*skip_space (p))
1776 *q = opcode + ((reg - 'b') << 3);
1787 emit_muluw (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1791 p = skip_space (args);
1792 if (TOLOWER (*p++) != 'h' || TOLOWER (*p++) != 'l' || *p++ != ',')
1799 p = parse_exp (p, & reg);
1801 if ((!reg.X_md) && reg.X_op == O_register)
1802 switch (reg.X_add_number)
1806 check_mach (INS_R800);
1809 *q = opcode + ((reg.X_add_number & 3) << 4);
1818 /* Port specific pseudo ops. */
1819 const pseudo_typeS md_pseudo_table[] =
1821 { "db" , emit_data, 1},
1824 { "def24", cons, 3},
1825 { "def32", cons, 4},
1826 { "defb", emit_data, 1},
1827 { "defs", s_space, 1}, /* Synonym for ds on some assemblers. */
1829 { "ds", s_space, 1}, /* Fill with bytes rather than words. */
1831 { "psect", obj_coff_section, 0}, /* TODO: Translate attributes. */
1832 { "set", 0, 0}, /* Real instruction on z80. */
1836 static table_t instab[] =
1838 { "adc", 0x88, 0x4A, emit_adc },
1839 { "add", 0x80, 0x09, emit_add },
1840 { "and", 0x00, 0xA0, emit_s },
1841 { "bit", 0xCB, 0x40, emit_bit },
1842 { "call", 0xCD, 0xC4, emit_jpcc },
1843 { "ccf", 0x00, 0x3F, emit_insn },
1844 { "cp", 0x00, 0xB8, emit_s },
1845 { "cpd", 0xED, 0xA9, emit_insn },
1846 { "cpdr", 0xED, 0xB9, emit_insn },
1847 { "cpi", 0xED, 0xA1, emit_insn },
1848 { "cpir", 0xED, 0xB1, emit_insn },
1849 { "cpl", 0x00, 0x2F, emit_insn },
1850 { "daa", 0x00, 0x27, emit_insn },
1851 { "dec", 0x0B, 0x05, emit_incdec },
1852 { "di", 0x00, 0xF3, emit_insn },
1853 { "djnz", 0x00, 0x10, emit_jr },
1854 { "ei", 0x00, 0xFB, emit_insn },
1855 { "ex", 0x00, 0x00, emit_ex},
1856 { "exx", 0x00, 0xD9, emit_insn },
1857 { "halt", 0x00, 0x76, emit_insn },
1858 { "im", 0xED, 0x46, emit_im },
1859 { "in", 0x00, 0x00, emit_in },
1860 { "inc", 0x03, 0x04, emit_incdec },
1861 { "ind", 0xED, 0xAA, emit_insn },
1862 { "indr", 0xED, 0xBA, emit_insn },
1863 { "ini", 0xED, 0xA2, emit_insn },
1864 { "inir", 0xED, 0xB2, emit_insn },
1865 { "jp", 0xC3, 0xC2, emit_jpcc },
1866 { "jr", 0x18, 0x20, emit_jrcc },
1867 { "ld", 0x00, 0x00, emit_ld },
1868 { "ldd", 0xED, 0xA8, emit_insn },
1869 { "lddr", 0xED, 0xB8, emit_insn },
1870 { "ldi", 0xED, 0xA0, emit_insn },
1871 { "ldir", 0xED, 0xB0, emit_insn },
1872 { "mulub", 0xED, 0xC5, emit_mulub }, /* R800 only. */
1873 { "muluw", 0xED, 0xC3, emit_muluw }, /* R800 only. */
1874 { "neg", 0xed, 0x44, emit_insn },
1875 { "nop", 0x00, 0x00, emit_insn },
1876 { "or", 0x00, 0xB0, emit_s },
1877 { "otdr", 0xED, 0xBB, emit_insn },
1878 { "otir", 0xED, 0xB3, emit_insn },
1879 { "out", 0x00, 0x00, emit_out },
1880 { "outd", 0xED, 0xAB, emit_insn },
1881 { "outi", 0xED, 0xA3, emit_insn },
1882 { "pop", 0x00, 0xC1, emit_pop },
1883 { "push", 0x00, 0xC5, emit_pop },
1884 { "res", 0xCB, 0x80, emit_bit },
1885 { "ret", 0xC9, 0xC0, emit_retcc },
1886 { "reti", 0xED, 0x4D, emit_insn },
1887 { "retn", 0xED, 0x45, emit_insn },
1888 { "rl", 0xCB, 0x10, emit_mr },
1889 { "rla", 0x00, 0x17, emit_insn },
1890 { "rlc", 0xCB, 0x00, emit_mr },
1891 { "rlca", 0x00, 0x07, emit_insn },
1892 { "rld", 0xED, 0x6F, emit_insn },
1893 { "rr", 0xCB, 0x18, emit_mr },
1894 { "rra", 0x00, 0x1F, emit_insn },
1895 { "rrc", 0xCB, 0x08, emit_mr },
1896 { "rrca", 0x00, 0x0F, emit_insn },
1897 { "rrd", 0xED, 0x67, emit_insn },
1898 { "rst", 0x00, 0xC7, emit_rst},
1899 { "sbc", 0x98, 0x42, emit_adc },
1900 { "scf", 0x00, 0x37, emit_insn },
1901 { "set", 0xCB, 0xC0, emit_bit },
1902 { "sla", 0xCB, 0x20, emit_mr },
1903 { "sli", 0xCB, 0x30, emit_mr },
1904 { "sll", 0xCB, 0x30, emit_mr },
1905 { "sra", 0xCB, 0x28, emit_mr },
1906 { "srl", 0xCB, 0x38, emit_mr },
1907 { "sub", 0x00, 0x90, emit_s },
1908 { "xor", 0x00, 0xA8, emit_s },
1912 md_assemble (char* str)
1920 old_ptr = input_line_pointer;
1921 p = skip_space (str);
1922 for (i = 0; (i < BUFLEN) && (ISALPHA (*p));)
1923 buf[i++] = TOLOWER (*p++);
1927 buf[BUFLEN-3] = buf[BUFLEN-2] = '.'; /* Mark opcode as abbreviated. */
1929 as_bad (_("Unknown instruction '%s'"), buf);
1931 else if ((*p) && (!ISSPACE (*p)))
1932 as_bad (_("syntax error"));
1939 insp = bsearch (&key, instab, ARRAY_SIZE (instab),
1940 sizeof (instab[0]), key_cmp);
1942 as_bad (_("Unknown instruction '%s'"), buf);
1945 p = insp->fp (insp->prefix, insp->opcode, p);
1947 if ((!err_flag) && *p)
1948 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
1952 input_line_pointer = old_ptr;
1956 md_apply_fix (fixS * fixP, valueT* valP, segT seg ATTRIBUTE_UNUSED)
1958 long val = * (long *) valP;
1959 char *p_lit = fixP->fx_where + fixP->fx_frag->fr_literal;
1961 switch (fixP->fx_r_type)
1963 case BFD_RELOC_8_PCREL:
1966 fixP->fx_no_overflow = 1;
1971 fixP->fx_no_overflow = (-128 <= val && val < 128);
1972 if (!fixP->fx_no_overflow)
1973 as_bad_where (fixP->fx_file, fixP->fx_line,
1974 _("relative jump out of range"));
1980 case BFD_RELOC_Z80_DISP8:
1983 fixP->fx_no_overflow = 1;
1988 fixP->fx_no_overflow = (-128 <= val && val < 128);
1989 if (!fixP->fx_no_overflow)
1990 as_bad_where (fixP->fx_file, fixP->fx_line,
1991 _("index offset out of range"));
1998 if (val > 255 || val < -128)
1999 as_warn_where (fixP->fx_file, fixP->fx_line, _("overflow"));
2001 fixP->fx_no_overflow = 1;
2002 if (fixP->fx_addsy == NULL)
2008 *p_lit++ = (val >> 8);
2009 fixP->fx_no_overflow = 1;
2010 if (fixP->fx_addsy == NULL)
2014 case BFD_RELOC_24: /* Def24 may produce this. */
2016 *p_lit++ = (val >> 8);
2017 *p_lit++ = (val >> 16);
2018 fixP->fx_no_overflow = 1;
2019 if (fixP->fx_addsy == NULL)
2023 case BFD_RELOC_32: /* Def32 and .long may produce this. */
2025 *p_lit++ = (val >> 8);
2026 *p_lit++ = (val >> 16);
2027 *p_lit++ = (val >> 24);
2028 if (fixP->fx_addsy == NULL)
2033 printf (_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type);
2038 /* GAS will call this to generate a reloc. GAS will pass the
2039 resulting reloc to `bfd_install_relocation'. This currently works
2040 poorly, as `bfd_install_relocation' often does the wrong thing, and
2041 instances of `tc_gen_reloc' have been written to work around the
2042 problems, which in turns makes it difficult to fix
2043 `bfd_install_relocation'. */
2045 /* If while processing a fixup, a reloc really
2046 needs to be created then it is done here. */
2049 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED , fixS *fixp)
2053 if (! bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type))
2055 as_bad_where (fixp->fx_file, fixp->fx_line,
2056 _("reloc %d not supported by object file format"),
2057 (int) fixp->fx_r_type);
2061 reloc = xmalloc (sizeof (arelent));
2062 reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
2063 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
2064 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
2065 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
2066 reloc->addend = fixp->fx_offset;