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, const 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 = (char *) "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]);
322 for (quote = *p++; quote != *p && '\n' != *p; ++p)
326 as_bad (_("-- unterminated string"));
327 ignore_rest_of_line ();
333 /* Check for <label>[:] [.](EQU|DEFL) <value>. */
334 if (is_name_beginner (*input_line_pointer))
337 char c, *rest, *line_start;
340 line_start = input_line_pointer;
344 c = get_symbol_name (&name);
345 rest = input_line_pointer + 1;
349 if (*rest == ' ' || *rest == '\t')
353 if (strncasecmp (rest, "EQU", 3) == 0)
355 else if (strncasecmp (rest, "DEFL", 4) == 0)
359 if (len && (!ISALPHA(rest[len]) ) )
361 /* Handle assignment here. */
362 if (line_start[-1] == '\n')
364 bump_line_counters ();
367 input_line_pointer = rest + len - 1;
368 /* Allow redefining with "DEFL" (len == 4), but not with "EQU". */
369 equals (name, len == 4);
374 /* Restore line and pointer. */
375 (void) restore_line_pointer (c);
376 input_line_pointer = line_start;
383 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
389 md_atof (int type ATTRIBUTE_UNUSED, char *litP ATTRIBUTE_UNUSED,
390 int *sizeP ATTRIBUTE_UNUSED)
392 return _("floating point numbers are not implemented");
396 md_section_align (segT seg ATTRIBUTE_UNUSED, valueT size)
402 md_pcrel_from (fixS * fixp)
404 return fixp->fx_where +
405 fixp->fx_frag->fr_address + 1;
408 typedef const char * (asfunc)(char, char, const char*);
410 typedef struct _table_t
413 unsigned char prefix;
414 unsigned char opcode;
418 /* Compares the key for structs that start with a char * to the key. */
420 key_cmp (const void * a, const void * b)
422 const char *str_a, *str_b;
424 str_a = *((const char**)a);
425 str_b = *((const char**)b);
426 return strcmp (str_a, str_b);
430 const char *key = buf;
432 /* Prevent an error on a line from also generating
433 a "junk at end of line" error message. */
434 static char err_flag;
437 error (const char * message)
439 as_bad ("%s", message);
446 error (_("illegal operand"));
450 wrong_mach (int ins_type)
457 p = "undocumented instruction";
460 p = "instruction does not work on R800";
463 p = "instruction only works R800";
466 p = 0; /* Not reachable. */
469 if (ins_type & ins_err)
472 as_warn ("%s", _(p));
476 check_mach (int ins_type)
478 if ((ins_type & ins_ok) == 0)
479 wrong_mach (ins_type);
480 ins_used |= ins_type;
483 /* Check whether an expression is indirect. */
485 is_indir (const char *s)
491 /* Indirection is indicated with parentheses. */
494 for (p = s, depth = 0; *p && *p != ','; ++p)
500 for (quote = *p++; quote != *p && *p != '\n'; ++p)
501 if (*p == '\\' && p[1])
511 p = skip_space (p + 1);
517 error (_("mismatched parentheses"));
523 error (_("mismatched parentheses"));
528 /* Check whether a symbol involves a register. */
530 contains_register(symbolS *sym)
534 expressionS * ex = symbol_get_value_expression(sym);
535 return (O_register == ex->X_op)
536 || (ex->X_add_symbol && contains_register(ex->X_add_symbol))
537 || (ex->X_op_symbol && contains_register(ex->X_op_symbol));
543 /* Parse general expression, not loooking for indexed addressing. */
545 parse_exp_not_indexed (const char *s, expressionS *op)
551 op->X_md = indir = is_indir (p);
552 input_line_pointer = (char*) s ;
557 error (_("missing operand"));
560 error (_("bad expression syntax"));
565 return input_line_pointer;
568 /* Parse expression, change operator to O_md1 for indexed addressing*/
570 parse_exp (const char *s, expressionS *op)
572 const char* res = parse_exp_not_indexed (s, op);
577 if (op->X_md && (O_register == symbol_get_value_expression(op->X_add_symbol)->X_op))
579 int rnum = symbol_get_value_expression(op->X_add_symbol)->X_add_number;
580 if ( ((REG_IX != rnum) && (REG_IY != rnum)) || contains_register(op->X_op_symbol) )
586 if (O_subtract == op->X_op)
589 minus.X_op = O_uminus;
590 minus.X_add_number = 0;
591 minus.X_add_symbol = op->X_op_symbol;
592 minus.X_op_symbol = 0;
593 op->X_op_symbol = make_expr_symbol(&minus);
596 symbol_get_value_expression(op->X_op_symbol)->X_add_number += op->X_add_number;
597 op->X_add_number = rnum;
598 op->X_add_symbol = op->X_op_symbol;
605 if ( op->X_md && ((REG_IX == op->X_add_number)||(REG_IY == op->X_add_number)) )
607 op->X_add_symbol = zero;
617 /* Condition codes, including some synonyms provided by HiTech zas. */
618 static const struct reg_entry cc_tab[] =
636 /* Parse condition code. */
638 parse_cc (const char *s, char * op)
642 struct reg_entry * cc_p;
644 for (i = 0; i < BUFLEN; ++i)
646 if (!ISALPHA (s[i])) /* Condition codes consist of letters only. */
648 buf[i] = TOLOWER (s[i]);
652 && ((s[i] == 0) || (s[i] == ',')))
655 cc_p = bsearch (&key, cc_tab, ARRAY_SIZE (cc_tab),
656 sizeof (cc_tab[0]), key_cmp);
673 emit_insn (char prefix, char opcode, const char * args)
688 void z80_cons_fix_new (fragS *frag_p, int offset, int nbytes, expressionS *exp)
690 bfd_reloc_code_real_type r[4] =
698 if (nbytes < 1 || nbytes > 4)
700 as_bad (_("unsupported BFD relocation size %u"), nbytes);
704 fix_new_exp (frag_p, offset, nbytes, exp, 0, r[nbytes-1]);
709 emit_byte (expressionS * val, bfd_reloc_code_real_type r_type)
715 *p = val->X_add_number;
716 if ( contains_register(val->X_add_symbol) || contains_register(val->X_op_symbol) )
720 else if ((r_type == BFD_RELOC_8_PCREL) && (val->X_op == O_constant))
722 as_bad (_("cannot make a relative jump to an absolute location"));
724 else if (val->X_op == O_constant)
727 hi = (BFD_RELOC_8 == r_type) ? 255 : 127;
729 if ((val->X_add_number < lo) || (val->X_add_number > hi))
731 if (r_type == BFD_RELOC_Z80_DISP8)
732 as_bad (_("offset too large"));
734 as_warn (_("overflow"));
739 fix_new_exp (frag_now, p - frag_now->fr_literal, 1, val,
740 (r_type == BFD_RELOC_8_PCREL) ? TRUE : FALSE, r_type);
741 /* FIXME : Process constant offsets immediately. */
746 emit_word (expressionS * val)
751 if ( (val->X_op == O_register)
752 || (val->X_op == O_md1)
753 || contains_register(val->X_add_symbol)
754 || contains_register(val->X_op_symbol) )
758 *p = val->X_add_number;
759 p[1] = (val->X_add_number>>8);
760 if (val->X_op != O_constant)
761 fix_new_exp (frag_now, p - frag_now->fr_literal, 2,
762 val, FALSE, BFD_RELOC_16);
767 emit_mx (char prefix, char opcode, int shift, expressionS * arg)
768 /* The operand m may be r, (hl), (ix+d), (iy+d),
769 if 0 == prefix m may also be ixl, ixh, iyl, iyh. */
774 rnum = arg->X_add_number;
790 if ((prefix == 0) && (rnum & R_INDEX))
792 prefix = (rnum & R_IX) ? 0xDD : 0xFD;
793 check_mach (INS_UNDOC);
802 q = frag_more (prefix ? 2 : 1);
805 * q ++ = opcode + (rnum << shift);
809 *q++ = (rnum & R_IX) ? 0xDD : 0xFD;
810 *q = (prefix) ? prefix : (opcode + (6 << shift));
812 expressionS offset = *arg;
813 offset.X_op = O_symbol;
814 offset.X_add_number = 0;
815 emit_byte (&offset, BFD_RELOC_Z80_DISP8);
820 *q = opcode+(6<<shift);
828 /* The operand m may be r, (hl), (ix+d), (iy+d),
829 if 0 = prefix m may also be ixl, ixh, iyl, iyh. */
831 emit_m (char prefix, char opcode, const char *args)
836 p = parse_exp (args, &arg_m);
841 emit_mx (prefix, opcode, 0, &arg_m);
849 /* The operand m may be as above or one of the undocumented
850 combinations (ix+d),r and (iy+d),r (if unportable instructions
853 emit_mr (char prefix, char opcode, const char *args)
855 expressionS arg_m, arg_r;
858 p = parse_exp (args, & arg_m);
865 p = parse_exp (p + 1, & arg_r);
867 if ((arg_r.X_md == 0)
868 && (arg_r.X_op == O_register)
869 && (arg_r.X_add_number < 8))
870 opcode += arg_r.X_add_number-6; /* Emit_mx () will add 6. */
876 check_mach (INS_UNPORT);
880 emit_mx (prefix, opcode, 0, & arg_m);
889 emit_sx (char prefix, char opcode, expressionS * arg_p)
897 emit_mx (prefix, opcode, 0, arg_p);
904 q = frag_more (prefix ? 2 : 1);
908 emit_byte (arg_p, BFD_RELOC_8);
913 /* The operand s may be r, (hl), (ix+d), (iy+d), n. */
915 emit_s (char prefix, char opcode, const char *args)
920 p = parse_exp (args, & arg_s);
921 emit_sx (prefix, opcode, & arg_s);
926 emit_call (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
929 const char *p; char *q;
931 p = parse_exp_not_indexed (args, &addr);
943 /* Operand may be rr, r, (hl), (ix+d), (iy+d). */
945 emit_incdec (char prefix, char opcode, const char * args)
949 const char *p; char *q;
951 p = parse_exp (args, &operand);
952 rnum = operand.X_add_number;
954 && (operand.X_op == O_register)
957 q = frag_more ((rnum & R_INDEX) ? 2 : 1);
959 *q++ = (rnum & R_IX) ? 0xDD : 0xFD;
960 *q = prefix + ((rnum & 3) << 4);
964 if ((operand.X_op == O_md1) || (operand.X_op == O_register))
965 emit_mx (0, opcode, 3, & operand);
973 emit_jr (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
979 p = parse_exp_not_indexed (args, &addr);
986 emit_byte (&addr, BFD_RELOC_8_PCREL);
992 emit_jp (char prefix, char opcode, const char * args)
999 p = parse_exp_not_indexed (args, & addr);
1002 rnum = addr.X_add_number;
1003 if ((O_register == addr.X_op) && (REG_HL == (rnum & ~R_INDEX)))
1005 q = frag_more ((rnum & R_INDEX) ? 2 : 1);
1007 *q++ = (rnum & R_IX) ? 0xDD : 0xFD;
1023 emit_im (char prefix, char opcode, const char * args)
1029 p = parse_exp (args, & mode);
1030 if (mode.X_md || (mode.X_op != O_constant))
1033 switch (mode.X_add_number)
1037 ++mode.X_add_number;
1042 *q = opcode + 8*mode.X_add_number;
1051 emit_pop (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1057 p = parse_exp (args, & regp);
1059 && (regp.X_op == O_register)
1060 && (regp.X_add_number & R_STACKABLE))
1064 rnum = regp.X_add_number;
1068 *q++ = (rnum&R_IX)?0xDD:0xFD;
1072 *q = opcode + ((rnum & 3) << 4);
1081 emit_retcc (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1086 p = parse_cc (args, &cc);
1092 return p ? p : args;
1096 emit_adc (char prefix, char opcode, const char * args)
1103 p = parse_exp (args, &term);
1106 error (_("bad instruction syntax"));
1110 if ((term.X_md) || (term.X_op != O_register))
1113 switch (term.X_add_number)
1116 p = emit_s (0, prefix, p);
1119 p = parse_exp (p, &term);
1120 if ((!term.X_md) && (term.X_op == O_register))
1122 rnum = term.X_add_number;
1123 if (R_ARITH == (rnum & (R_ARITH | R_INDEX)))
1127 *q = opcode + ((rnum & 3) << 4);
1139 emit_add (char prefix, char opcode, const char * args)
1146 p = parse_exp (args, &term);
1149 error (_("bad instruction syntax"));
1153 if ((term.X_md) || (term.X_op != O_register))
1156 switch (term.X_add_number & ~R_INDEX)
1159 p = emit_s (0, prefix, p);
1162 lhs = term.X_add_number;
1163 p = parse_exp (p, &term);
1164 if ((!term.X_md) && (term.X_op == O_register))
1166 rhs = term.X_add_number;
1168 && ((rhs == lhs) || ((rhs & ~R_INDEX) != REG_HL)))
1170 q = frag_more ((lhs & R_INDEX) ? 2 : 1);
1172 *q++ = (lhs & R_IX) ? 0xDD : 0xFD;
1173 *q = opcode + ((rhs & 3) << 4);
1185 emit_bit (char prefix, char opcode, const char * args)
1191 p = parse_exp (args, &b);
1193 error (_("bad instruction syntax"));
1195 bn = b.X_add_number;
1197 && (b.X_op == O_constant)
1202 /* Bit : no optional third operand. */
1203 p = emit_m (prefix, opcode + (bn << 3), p);
1205 /* Set, res : resulting byte can be copied to register. */
1206 p = emit_mr (prefix, opcode + (bn << 3), p);
1214 emit_jpcc (char prefix, char opcode, const char * args)
1219 p = parse_cc (args, & cc);
1220 if (p && *p++ == ',')
1221 p = emit_call (0, opcode + cc, p);
1223 p = (prefix == (char)0xC3)
1224 ? emit_jp (0xE9, prefix, args)
1225 : emit_call (0, prefix, args);
1230 emit_jrcc (char prefix, char opcode, const char * args)
1235 p = parse_cc (args, &cc);
1236 if (p && *p++ == ',')
1239 error (_("condition code invalid for jr"));
1241 p = emit_jr (0, opcode + cc, p);
1244 p = emit_jr (0, prefix, args);
1250 emit_ex (char prefix_in ATTRIBUTE_UNUSED,
1251 char opcode_in ATTRIBUTE_UNUSED, const char * args)
1255 char prefix, opcode;
1257 p = parse_exp_not_indexed (args, &op);
1261 error (_("bad instruction syntax"));
1265 prefix = opcode = 0;
1266 if (op.X_op == O_register)
1267 switch (op.X_add_number | (op.X_md ? 0x8000 : 0))
1270 if (TOLOWER (*p++) == 'a' && TOLOWER (*p++) == 'f')
1272 /* The scrubber changes '\'' to '`' in this context. */
1279 if (TOLOWER (*p++) == 'h' && TOLOWER (*p++) == 'l')
1283 p = parse_exp (p, & op);
1284 if (op.X_op == O_register
1286 && (op.X_add_number & ~R_INDEX) == REG_HL)
1289 if (R_INDEX & op.X_add_number)
1290 prefix = (R_IX & op.X_add_number) ? 0xDD : 0xFD;
1295 emit_insn (prefix, opcode, p);
1303 emit_in (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
1306 expressionS reg, port;
1310 p = parse_exp (args, ®);
1313 error (_("bad instruction syntax"));
1317 p = parse_exp (p, &port);
1319 && reg.X_op == O_register
1320 && (reg.X_add_number <= 7 || reg.X_add_number == REG_F)
1323 if (port.X_op != O_md1 && port.X_op != O_register)
1325 if (REG_A == reg.X_add_number)
1329 emit_byte (&port, BFD_RELOC_8);
1336 if (port.X_add_number == REG_C)
1338 if (reg.X_add_number == REG_F)
1339 check_mach (INS_UNDOC);
1344 *q = 0x40|((reg.X_add_number&7)<<3);
1357 emit_out (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
1360 expressionS reg, port;
1364 p = parse_exp (args, & port);
1367 error (_("bad instruction syntax"));
1370 p = parse_exp (p, ®);
1372 { ill_op (); return p; }
1373 /* Allow "out (c), 0" as unportable instruction. */
1374 if (reg.X_op == O_constant && reg.X_add_number == 0)
1376 check_mach (INS_UNPORT);
1377 reg.X_op = O_register;
1378 reg.X_add_number = 6;
1381 || reg.X_op != O_register
1382 || reg.X_add_number > 7)
1385 if (port.X_op != O_register && port.X_op != O_md1)
1387 if (REG_A == reg.X_add_number)
1391 emit_byte (&port, BFD_RELOC_8);
1398 if (REG_C == port.X_add_number)
1402 *q = 0x41 | (reg.X_add_number << 3);
1411 emit_rst (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1417 p = parse_exp_not_indexed (args, &addr);
1418 if (addr.X_op != O_constant)
1420 error ("rst needs constant address");
1424 if (addr.X_add_number & ~(7 << 3))
1429 *q = opcode + (addr.X_add_number & (7 << 3));
1435 emit_ldxhl (char prefix, char opcode, expressionS *src, expressionS *d)
1443 if (src->X_op == O_register)
1445 if (src->X_add_number>7)
1454 *q = opcode + src->X_add_number;
1456 emit_byte (d, BFD_RELOC_Z80_DISP8);
1469 emit_byte (d, BFD_RELOC_Z80_DISP8);
1470 emit_byte (src, BFD_RELOC_8);
1476 emit_ldreg (int dest, expressionS * src)
1483 /* 8 Bit ld group: */
1486 if (src->X_md == 0 && src->X_op == O_register && src->X_add_number == REG_A)
1490 *q = (dest == REG_I) ? 0x47 : 0x4F;
1497 if ((src->X_md) && src->X_op != O_register && src->X_op != O_md1)
1506 && src->X_op == O_register
1507 && (src->X_add_number == REG_BC || src->X_add_number == REG_DE))
1510 *q = 0x0A + ((src->X_add_number & 1) << 4);
1515 && src->X_op == O_register
1516 && (src->X_add_number == REG_R || src->X_add_number == REG_I))
1520 *q = (src->X_add_number == REG_I) ? 0x57 : 0x5F;
1528 emit_sx (0, 0x40 + (dest << 3), src);
1533 if ((src->X_md == 0)
1534 && (src->X_op == O_register)
1535 && (src->X_add_number & R_INDEX))
1538 emit_sx (0, 0x40 + (dest << 3), src);
1550 check_mach (INS_UNDOC);
1551 if (src-> X_op == O_register)
1553 rnum = src->X_add_number;
1554 if ((rnum & ~R_INDEX) < 8
1555 && ((rnum & R_INDEX) == (dest & R_INDEX)
1556 || ( (rnum & ~R_INDEX) != REG_H
1557 && (rnum & ~R_INDEX) != REG_L)))
1560 *q++ = (dest & R_IX) ? 0xDD : 0xFD;
1561 *q = 0x40 + ((dest & 0x07) << 3) + (rnum & 7);
1569 *q++ = (dest & R_IX) ? 0xDD : 0xFD;
1570 *q = 0x06 + ((dest & 0x07) << 3);
1571 emit_byte (src, BFD_RELOC_8);
1575 /* 16 Bit ld group: */
1578 && src->X_op == O_register
1579 && REG_HL == (src->X_add_number &~ R_INDEX))
1581 q = frag_more ((src->X_add_number & R_INDEX) ? 2 : 1);
1582 if (src->X_add_number & R_INDEX)
1583 *q++ = (src->X_add_number & R_IX) ? 0xDD : 0xFD;
1590 if (src->X_op == O_register || src->X_op == O_md1)
1592 q = frag_more (src->X_md ? 2 : 1);
1596 *q = 0x4B + ((dest & 3) << 4);
1599 *q = 0x01 + ((dest & 3) << 4);
1606 if (src->X_op == O_register || src->X_op == O_md1)
1608 q = frag_more ((dest & R_INDEX) ? 2 : 1);
1610 * q ++ = (dest & R_IX) ? 0xDD : 0xFD;
1611 *q = (src->X_md) ? 0x2A : 0x21;
1626 emit_ld (char prefix_in ATTRIBUTE_UNUSED, char opcode_in ATTRIBUTE_UNUSED,
1629 expressionS dst, src;
1632 char prefix, opcode;
1634 p = parse_exp (args, &dst);
1636 error (_("bad instruction syntax"));
1637 p = parse_exp (p, &src);
1643 expressionS dst_offset = dst;
1644 dst_offset.X_op = O_symbol;
1645 dst_offset.X_add_number = 0;
1646 emit_ldxhl ((dst.X_add_number & R_IX) ? 0xDD : 0xFD, 0x70,
1654 switch (dst.X_add_number)
1658 if (src.X_md == 0 && src.X_op == O_register && src.X_add_number == REG_A)
1661 *q = 0x02 + ( (dst.X_add_number & 1) << 4);
1667 emit_ldxhl (0, 0x70, &src, NULL);
1674 emit_ldreg (dst.X_add_number, &src);
1678 if (src.X_md != 0 || src.X_op != O_register)
1680 prefix = opcode = 0;
1681 switch (src.X_add_number)
1684 opcode = 0x32; break;
1685 case REG_BC: case REG_DE: case REG_SP:
1686 prefix = 0xED; opcode = 0x43 + ((src.X_add_number&3)<<4); break;
1688 opcode = 0x22; break;
1690 prefix = 0xDD; opcode = 0x22; break;
1692 prefix = 0xFD; opcode = 0x22; break;
1696 q = frag_more (prefix?2:1);
1709 emit_data (int size ATTRIBUTE_UNUSED)
1716 if (is_it_end_of_statement ())
1718 demand_empty_rest_of_line ();
1721 p = skip_space (input_line_pointer);
1725 if (*p == '\"' || *p == '\'')
1727 for (quote = *p, q = ++p, cnt = 0; *p && quote != *p; ++p, ++cnt)
1729 u = frag_more (cnt);
1732 as_warn (_("unterminated string"));
1734 p = skip_space (p+1);
1738 p = parse_exp (p, &exp);
1739 if (exp.X_op == O_md1 || exp.X_op == O_register)
1745 as_warn (_("parentheses ignored"));
1746 emit_byte (&exp, BFD_RELOC_8);
1750 while (*p++ == ',') ;
1751 input_line_pointer = (char *)(p-1);
1755 emit_mulub (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1759 p = skip_space (args);
1760 if (TOLOWER (*p++) != 'a' || *p++ != ',')
1766 reg = TOLOWER (*p++);
1773 check_mach (INS_R800);
1774 if (!*skip_space (p))
1778 *q = opcode + ((reg - 'b') << 3);
1790 emit_muluw (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
1794 p = skip_space (args);
1795 if (TOLOWER (*p++) != 'h' || TOLOWER (*p++) != 'l' || *p++ != ',')
1802 p = parse_exp (p, & reg);
1804 if ((!reg.X_md) && reg.X_op == O_register)
1805 switch (reg.X_add_number)
1809 check_mach (INS_R800);
1812 *q = opcode + ((reg.X_add_number & 3) << 4);
1821 /* Port specific pseudo ops. */
1822 const pseudo_typeS md_pseudo_table[] =
1824 { "db" , emit_data, 1},
1827 { "def24", cons, 3},
1828 { "def32", cons, 4},
1829 { "defb", emit_data, 1},
1830 { "defs", s_space, 1}, /* Synonym for ds on some assemblers. */
1832 { "ds", s_space, 1}, /* Fill with bytes rather than words. */
1834 { "psect", obj_coff_section, 0}, /* TODO: Translate attributes. */
1835 { "set", 0, 0}, /* Real instruction on z80. */
1839 static table_t instab[] =
1841 { "adc", 0x88, 0x4A, emit_adc },
1842 { "add", 0x80, 0x09, emit_add },
1843 { "and", 0x00, 0xA0, emit_s },
1844 { "bit", 0xCB, 0x40, emit_bit },
1845 { "call", 0xCD, 0xC4, emit_jpcc },
1846 { "ccf", 0x00, 0x3F, emit_insn },
1847 { "cp", 0x00, 0xB8, emit_s },
1848 { "cpd", 0xED, 0xA9, emit_insn },
1849 { "cpdr", 0xED, 0xB9, emit_insn },
1850 { "cpi", 0xED, 0xA1, emit_insn },
1851 { "cpir", 0xED, 0xB1, emit_insn },
1852 { "cpl", 0x00, 0x2F, emit_insn },
1853 { "daa", 0x00, 0x27, emit_insn },
1854 { "dec", 0x0B, 0x05, emit_incdec },
1855 { "di", 0x00, 0xF3, emit_insn },
1856 { "djnz", 0x00, 0x10, emit_jr },
1857 { "ei", 0x00, 0xFB, emit_insn },
1858 { "ex", 0x00, 0x00, emit_ex},
1859 { "exx", 0x00, 0xD9, emit_insn },
1860 { "halt", 0x00, 0x76, emit_insn },
1861 { "im", 0xED, 0x46, emit_im },
1862 { "in", 0x00, 0x00, emit_in },
1863 { "inc", 0x03, 0x04, emit_incdec },
1864 { "ind", 0xED, 0xAA, emit_insn },
1865 { "indr", 0xED, 0xBA, emit_insn },
1866 { "ini", 0xED, 0xA2, emit_insn },
1867 { "inir", 0xED, 0xB2, emit_insn },
1868 { "jp", 0xC3, 0xC2, emit_jpcc },
1869 { "jr", 0x18, 0x20, emit_jrcc },
1870 { "ld", 0x00, 0x00, emit_ld },
1871 { "ldd", 0xED, 0xA8, emit_insn },
1872 { "lddr", 0xED, 0xB8, emit_insn },
1873 { "ldi", 0xED, 0xA0, emit_insn },
1874 { "ldir", 0xED, 0xB0, emit_insn },
1875 { "mulub", 0xED, 0xC5, emit_mulub }, /* R800 only. */
1876 { "muluw", 0xED, 0xC3, emit_muluw }, /* R800 only. */
1877 { "neg", 0xed, 0x44, emit_insn },
1878 { "nop", 0x00, 0x00, emit_insn },
1879 { "or", 0x00, 0xB0, emit_s },
1880 { "otdr", 0xED, 0xBB, emit_insn },
1881 { "otir", 0xED, 0xB3, emit_insn },
1882 { "out", 0x00, 0x00, emit_out },
1883 { "outd", 0xED, 0xAB, emit_insn },
1884 { "outi", 0xED, 0xA3, emit_insn },
1885 { "pop", 0x00, 0xC1, emit_pop },
1886 { "push", 0x00, 0xC5, emit_pop },
1887 { "res", 0xCB, 0x80, emit_bit },
1888 { "ret", 0xC9, 0xC0, emit_retcc },
1889 { "reti", 0xED, 0x4D, emit_insn },
1890 { "retn", 0xED, 0x45, emit_insn },
1891 { "rl", 0xCB, 0x10, emit_mr },
1892 { "rla", 0x00, 0x17, emit_insn },
1893 { "rlc", 0xCB, 0x00, emit_mr },
1894 { "rlca", 0x00, 0x07, emit_insn },
1895 { "rld", 0xED, 0x6F, emit_insn },
1896 { "rr", 0xCB, 0x18, emit_mr },
1897 { "rra", 0x00, 0x1F, emit_insn },
1898 { "rrc", 0xCB, 0x08, emit_mr },
1899 { "rrca", 0x00, 0x0F, emit_insn },
1900 { "rrd", 0xED, 0x67, emit_insn },
1901 { "rst", 0x00, 0xC7, emit_rst},
1902 { "sbc", 0x98, 0x42, emit_adc },
1903 { "scf", 0x00, 0x37, emit_insn },
1904 { "set", 0xCB, 0xC0, emit_bit },
1905 { "sla", 0xCB, 0x20, emit_mr },
1906 { "sli", 0xCB, 0x30, emit_mr },
1907 { "sll", 0xCB, 0x30, emit_mr },
1908 { "sra", 0xCB, 0x28, emit_mr },
1909 { "srl", 0xCB, 0x38, emit_mr },
1910 { "sub", 0x00, 0x90, emit_s },
1911 { "xor", 0x00, 0xA8, emit_s },
1915 md_assemble (char* str)
1923 old_ptr = input_line_pointer;
1924 p = skip_space (str);
1925 for (i = 0; (i < BUFLEN) && (ISALPHA (*p));)
1926 buf[i++] = TOLOWER (*p++);
1930 buf[BUFLEN-3] = buf[BUFLEN-2] = '.'; /* Mark opcode as abbreviated. */
1932 as_bad (_("Unknown instruction '%s'"), buf);
1934 else if ((*p) && (!ISSPACE (*p)))
1935 as_bad (_("syntax error"));
1942 insp = bsearch (&key, instab, ARRAY_SIZE (instab),
1943 sizeof (instab[0]), key_cmp);
1945 as_bad (_("Unknown instruction '%s'"), buf);
1948 p = insp->fp (insp->prefix, insp->opcode, p);
1950 if ((!err_flag) && *p)
1951 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
1955 input_line_pointer = old_ptr;
1959 md_apply_fix (fixS * fixP, valueT* valP, segT seg ATTRIBUTE_UNUSED)
1961 long val = * (long *) valP;
1962 char *p_lit = fixP->fx_where + fixP->fx_frag->fr_literal;
1964 switch (fixP->fx_r_type)
1966 case BFD_RELOC_8_PCREL:
1969 fixP->fx_no_overflow = 1;
1974 fixP->fx_no_overflow = (-128 <= val && val < 128);
1975 if (!fixP->fx_no_overflow)
1976 as_bad_where (fixP->fx_file, fixP->fx_line,
1977 _("relative jump out of range"));
1983 case BFD_RELOC_Z80_DISP8:
1986 fixP->fx_no_overflow = 1;
1991 fixP->fx_no_overflow = (-128 <= val && val < 128);
1992 if (!fixP->fx_no_overflow)
1993 as_bad_where (fixP->fx_file, fixP->fx_line,
1994 _("index offset out of range"));
2001 if (val > 255 || val < -128)
2002 as_warn_where (fixP->fx_file, fixP->fx_line, _("overflow"));
2004 fixP->fx_no_overflow = 1;
2005 if (fixP->fx_addsy == NULL)
2011 *p_lit++ = (val >> 8);
2012 fixP->fx_no_overflow = 1;
2013 if (fixP->fx_addsy == NULL)
2017 case BFD_RELOC_24: /* Def24 may produce this. */
2019 *p_lit++ = (val >> 8);
2020 *p_lit++ = (val >> 16);
2021 fixP->fx_no_overflow = 1;
2022 if (fixP->fx_addsy == NULL)
2026 case BFD_RELOC_32: /* Def32 and .long may produce this. */
2028 *p_lit++ = (val >> 8);
2029 *p_lit++ = (val >> 16);
2030 *p_lit++ = (val >> 24);
2031 if (fixP->fx_addsy == NULL)
2036 printf (_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type);
2041 /* GAS will call this to generate a reloc. GAS will pass the
2042 resulting reloc to `bfd_install_relocation'. This currently works
2043 poorly, as `bfd_install_relocation' often does the wrong thing, and
2044 instances of `tc_gen_reloc' have been written to work around the
2045 problems, which in turns makes it difficult to fix
2046 `bfd_install_relocation'. */
2048 /* If while processing a fixup, a reloc really
2049 needs to be created then it is done here. */
2052 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED , fixS *fixp)
2056 if (! bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type))
2058 as_bad_where (fixp->fx_file, fixp->fx_line,
2059 _("reloc %d not supported by object file format"),
2060 (int) fixp->fx_r_type);
2064 reloc = XNEW (arelent);
2065 reloc->sym_ptr_ptr = XNEW (asymbol *);
2066 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
2067 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
2068 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
2069 reloc->addend = fixp->fx_offset;