1 /* tc-z8k.c -- Assemble code for the Zilog Z800n
2 Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2001, 2002
3 Free Software Foundation, Inc.
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 2, 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, 59 Temple Place - Suite 330, Boston, MA
22 /* Written By Steve Chamberlain <sac@cygnus.com>. */
29 #include "safe-ctype.h"
30 #include "opcodes/z8k-opc.h"
32 const char comment_chars[] = "!";
33 const char line_comment_chars[] = "#";
34 const char line_separator_chars[] = ";";
37 extern int coff_flags;
39 const int md_reloc_size;
47 machine = bfd_mach_z8001;
55 machine = bfd_mach_z8002;
63 record_alignment (now_seg, 1);
66 void obj_coff_section ();
83 if (*input_line_pointer == '\'')
87 c = *input_line_pointer++;
92 c = (tohex (input_line_pointer[0]) << 4)
93 | tohex (input_line_pointer[1]);
94 input_line_pointer += 2;
96 FRAG_APPEND_1_CHAR (c);
97 c = *input_line_pointer++;
99 demand_empty_rest_of_line ();
103 /* This table describes all the machine specific pseudo-ops the assembler
104 has to support. The fields are:
105 pseudo-op name without dot
106 function to call to execute this pseudo-op
107 Integer arg to pass to the function
110 const pseudo_typeS md_pseudo_table[] = {
112 {"data.b" , cons , 1},
113 {"data.w" , cons , 2},
114 {"data.l" , cons , 4},
115 {"form" , listing_psize , 0},
116 {"heading", listing_title , 0},
117 {"import" , s_ignore , 0},
118 {"page" , listing_eject , 0},
119 {"program", s_ignore , 0},
120 {"z8001" , s_segm , 0},
121 {"z8002" , s_unseg , 0},
123 {"segm" , s_segm , 0},
124 {"unsegm" , s_unseg , 0},
125 {"unseg" , s_unseg , 0},
126 {"name" , s_app_file , 0},
127 {"global" , s_globl , 0},
132 {"rsect" , obj_coff_section, 0},
133 {"sect" , obj_coff_section, 0},
134 {"block" , s_space , 0},
139 const char EXP_CHARS[] = "eE";
141 /* Chars that mean this number is a floating point constant.
144 const char FLT_CHARS[] = "rRsSfFdDxXpP";
146 /* Opcode mnemonics. */
147 static struct hash_control *opcode_hash_control;
152 opcode_entry_type *opcode;
153 char *prev_name = "";
156 opcode_hash_control = hash_new ();
158 for (opcode = z8k_table; opcode->name; opcode++)
160 /* Only enter unique codes into the table. */
161 if (strcmp (opcode->name, prev_name))
163 hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
167 prev_name = opcode->name;
170 /* Default to z8002. */
173 /* Insert the pseudo ops, too. */
174 for (idx = 0; md_pseudo_table[idx].poc_name; idx++)
176 opcode_entry_type *fake_opcode;
177 fake_opcode = (opcode_entry_type *) malloc (sizeof (opcode_entry_type));
178 fake_opcode->name = md_pseudo_table[idx].poc_name;
179 fake_opcode->func = (void *) (md_pseudo_table + idx);
180 fake_opcode->opcode = 250;
181 hash_insert (opcode_hash_control, fake_opcode->name, fake_opcode);
193 typedef struct z8k_op {
194 /* 'b','w','r','q'. */
202 /* Any other register associated with the mode. */
205 /* Any expression. */
209 static expressionS *da_operand;
210 static expressionS *imm_operand;
223 if (ISDIGIT (src[1]))
225 *reg = (src[0] - '0') * 10 + src[1] - '0';
230 *reg = (src[0] - '0');
241 WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
249 /* Try to parse a reg name. Return a pointer to the first character
250 in SRC after the reg name. */
253 parse_reg (src, mode, reg)
261 if (src[0] == 's' && src[1] == 'p' && (src[2] == 0 || src[2] == ','))
265 *mode = CLASS_REG_LONG;
270 *mode = CLASS_REG_WORD;
279 if (src[2] < '0' || src[2] > '9')
280 return res; /* Assume no register name but a label starting with 'rr'. */
281 *mode = CLASS_REG_LONG;
282 res = whatreg (reg, src + 2);
285 as_warn (_("register rr%d, out of range."), regno);
287 else if (src[1] == 'h')
289 if (src[2] < '0' || src[2] > '9')
290 return res; /* Assume no register name but a label starting with 'rh'. */
291 *mode = CLASS_REG_BYTE;
292 res = whatreg (reg, src + 2);
295 as_warn (_("register rh%d, out of range."), regno);
297 else if (src[1] == 'l')
299 if (src[2] < '0' || src[2] > '9')
300 return res; /* Assume no register name but a label starting with 'rl'. */
301 *mode = CLASS_REG_BYTE;
302 res = whatreg (reg, src + 2);
305 as_warn (_("register rl%d, out of range."), regno);
308 else if (src[1] == 'q')
310 if (src[2] < '0' || src[2] > '9')
311 return res; /* Assume no register name but a label starting with 'rq'. */
312 *mode = CLASS_REG_QUAD;
313 res = whatreg (reg, src + 2);
316 as_warn (_("register rq%d, out of range."), regno);
320 if (src[1] < '0' || src[1] > '9')
321 return res; /* Assume no register name but a label starting with 'r'. */
322 *mode = CLASS_REG_WORD;
323 res = whatreg (reg, src + 1);
326 as_warn (_("register r%d, out of range."), regno);
337 char *save = input_line_pointer;
340 input_line_pointer = s;
342 if (op->X_op == O_absent)
343 as_bad (_("missing operand"));
344 new = input_line_pointer;
345 input_line_pointer = save;
349 /* The many forms of operand:
371 as_bad (_("expected %c"), what);
376 /* Make sure the mode supplied is the size of a word. */
379 regword (mode, string)
388 as_bad (_("register is wrong size for a word %s"), string);
392 /* Make sure the mode supplied is the size of an address. */
395 regaddr (mode, string)
401 ok = segmented_mode ? CLASS_REG_LONG : CLASS_REG_WORD;
404 as_bad (_("register is wrong size for address %s"), string);
413 struct ctrl_names ctrl_table[] = {
426 get_ctrl_operand (ptr, mode, dst)
429 unsigned int dst ATTRIBUTE_UNUSED;
437 mode->mode = CLASS_CTRL;
438 for (i = 0; ctrl_table[i].name; i++)
442 for (j = 0; ctrl_table[i].name[j]; j++)
444 if (ctrl_table[i].name[j] != src[j])
447 the_ctrl = ctrl_table[i].value;
463 struct flag_names flag_table[] = {
474 get_flags_operand (ptr, mode, dst)
477 unsigned int dst ATTRIBUTE_UNUSED;
486 mode->mode = CLASS_FLAGS;
488 for (j = 0; j <= 9; j++)
492 for (i = 0; flag_table[i].name; i++)
494 if (flag_table[i].name[0] == src[j])
496 the_flags = the_flags | flag_table[i].value;
509 struct interrupt_names {
515 struct interrupt_names intr_table[] = {
524 get_interrupt_operand (ptr, mode, dst)
527 unsigned int dst ATTRIBUTE_UNUSED;
535 mode->mode = CLASS_IMM;
536 for (i = 0; intr_table[i].name; i++)
540 for (j = 0; intr_table[i].name[j]; j++)
542 if (intr_table[i].name[j] != src[j])
545 the_interrupt = intr_table[i].value;
561 struct cc_names table[] = {
588 get_cc_operand (ptr, mode, dst)
591 unsigned int dst ATTRIBUTE_UNUSED;
599 mode->mode = CLASS_CC;
600 for (i = 0; table[i].name; i++)
604 for (j = 0; table[i].name[j]; j++)
606 if (table[i].name[j] != src[j])
609 the_cc = table[i].value;
619 get_operand (ptr, mode, dst)
622 unsigned int dst ATTRIBUTE_UNUSED;
633 mode->mode = CLASS_IMM;
634 imm_operand = &(mode->exp);
635 src = parse_exp (src + 1, &(mode->exp));
637 else if (*src == '@')
641 mode->mode = CLASS_IR;
642 src = parse_reg (src + 1, &d, &mode->reg);
648 end = parse_reg (src, &mode->mode, ®n);
658 end = parse_reg (src, &nw, &nr);
665 as_bad (_("Missing ) in ra(rb)"));
669 regaddr (mode->mode, "ra(rb) ra");
671 regword (mode->mode, "ra(rb) rb");
673 mode->mode = CLASS_BX;
683 src = parse_exp (src, &(mode->exp));
684 src = checkfor (src, ')');
685 mode->mode = CLASS_BA;
688 imm_operand = &(mode->exp);
699 /* No initial reg. */
700 src = parse_exp (src, &(mode->exp));
704 end = parse_reg (src, &(mode->mode), ®n);
705 regword (mode->mode, "addr(Ra) ra");
706 mode->mode = CLASS_X;
709 da_operand = &(mode->exp);
710 src = checkfor (end, ')');
714 /* Just an address. */
715 mode->mode = CLASS_DA;
718 da_operand = &(mode->exp);
726 get_operands (opcode, op_end, operand)
727 opcode_entry_type *opcode;
734 switch (opcode->noperands)
743 if (opcode->arg_info[0] == CLASS_CC)
745 get_cc_operand (&ptr, operand + 0, 0);
747 else if (opcode->arg_info[0] == CLASS_FLAGS)
749 get_flags_operand (&ptr, operand + 0, 0);
751 else if (opcode->arg_info[0] == (CLASS_IMM + (ARG_IMM2)))
753 get_interrupt_operand (&ptr, operand + 0, 0);
757 get_operand (&ptr, operand + 0, 0);
765 if (opcode->arg_info[0] == CLASS_CC)
767 get_cc_operand (&ptr, operand + 0, 0);
769 else if (opcode->arg_info[0] == CLASS_CTRL)
771 get_ctrl_operand (&ptr, operand + 0, 0);
775 get_operand (&ptr, operand + 0, 0);
780 get_ctrl_operand (&ptr, operand + 1, 1);
786 get_operand (&ptr, operand + 0, 0);
792 get_operand (&ptr, operand + 1, 1);
797 get_operand (&ptr, operand + 0, 0);
800 get_operand (&ptr, operand + 1, 1);
803 get_operand (&ptr, operand + 2, 2);
808 get_operand (&ptr, operand + 0, 0);
811 get_operand (&ptr, operand + 1, 1);
814 get_operand (&ptr, operand + 2, 2);
817 get_cc_operand (&ptr, operand + 3, 3);
827 /* Passed a pointer to a list of opcodes which use different
828 addressing modes. Return the opcode which matches the opcodes
831 static opcode_entry_type *
832 get_specific (opcode, operands)
833 opcode_entry_type *opcode;
837 opcode_entry_type *this_try = opcode;
839 unsigned int noperands = opcode->noperands;
841 int this_index = opcode->idx;
843 while (this_index == opcode->idx && !found)
848 for (i = 0; i < noperands; i++)
850 unsigned int mode = operands[i].mode;
852 if ((mode & CLASS_MASK) != (this_try->arg_info[i] & CLASS_MASK))
854 /* It could be an pc rel operand, if this is a da mode
855 and we like disps, then insert it. */
857 if (mode == CLASS_DA && this_try->arg_info[i] == CLASS_DISP)
859 /* This is the case. */
860 operands[i].mode = CLASS_DISP;
862 else if (mode == CLASS_BA && this_try->arg_info[i])
864 /* Can't think of a way to turn what we've been
865 given into something that's OK. */
868 else if (this_try->arg_info[i] & CLASS_PR)
870 if (mode == CLASS_REG_LONG && segmented_mode)
874 else if (mode == CLASS_REG_WORD && !segmented_mode)
884 switch (mode & CLASS_MASK)
899 reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
914 #if 0 /* Not used. */
916 check_operand (operand, width, string)
917 struct z8k_op *operand;
921 if (operand->exp.X_add_symbol == 0
922 && operand->exp.X_op_symbol == 0)
925 /* No symbol involved, let's look at offset, it's dangerous if
926 any of the high bits are not 0 or ff's, find out by oring or
927 anding with the width and seeing if the answer is 0 or all
929 if ((operand->exp.X_add_number & ~width) != 0 &&
930 (operand->exp.X_add_number | width) != (~0))
932 as_warn (_("operand %s0x%x out of range."),
933 string, operand->exp.X_add_number);
940 static char buffer[20];
943 newfix (ptr, type, operand)
946 expressionS *operand;
948 if (operand->X_add_symbol
949 || operand->X_op_symbol
950 || operand->X_add_number)
952 fix_new_exp (frag_now,
962 apply_fix (ptr, type, operand, size)
965 expressionS *operand;
968 int n = operand->X_add_number;
970 newfix ((ptr - buffer) / 2, type, operand);
973 case 8: /* 8 nibbles == 32 bits. */
978 case 4: /* 4 nibbles == 16 bits. */
990 /* Now we know what sort of opcodes it is. Let's build the bytes. */
992 #define INSERT(x,y) *x++ = y>>24; *x++ = y>> 16; *x++=y>>8; *x++ =y;
995 build_bytes (this_try, operand)
996 opcode_entry_type *this_try;
997 struct z8k_op *operand ATTRIBUTE_UNUSED;
999 char *output_ptr = buffer;
1003 unsigned int *class_ptr;
1005 frag_wane (frag_now);
1008 memset (buffer, 20, 0);
1009 class_ptr = this_try->byte_info;
1011 for (nibble = 0; (c = *class_ptr++); nibble++)
1014 switch (c & CLASS_MASK)
1020 /* Direct address, we don't cope with the SS mode right now. */
1023 /* da_operand->X_add_number |= 0x80000000; -- Now set at relocation time. */
1024 output_ptr = apply_fix (output_ptr, R_IMM32, da_operand, 8);
1028 output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
1034 output_ptr = apply_fix (output_ptr, R_JR, da_operand, 2);
1041 output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
1048 output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
1049 output_ptr[-2] = 0x8;
1053 case CLASS_BIT_1OR2:
1054 *output_ptr = c & 0xf;
1057 if (imm_operand->X_add_number == 2)
1059 else if (imm_operand->X_add_number != 1)
1060 as_bad (_("immediate must be 1 or 2"));
1063 as_bad (_("immediate 1 or 2 expected"));
1067 *output_ptr++ = the_cc;
1070 *output_ptr++ = the_ctrl;
1073 *output_ptr++ = the_ctrl | 0x8;
1076 *output_ptr++ = (~the_interrupt & 0x3);
1079 *output_ptr++ = (~the_interrupt & 0x3) | 0x4;
1082 *output_ptr++ = the_flags;
1086 *output_ptr++ = c & 0xf;
1089 if (reg[c & 0xf] == 0)
1090 as_bad (_("can't use R0 here"));
1093 case CLASS_REG_BYTE:
1094 case CLASS_REG_WORD:
1095 case CLASS_REG_LONG:
1096 case CLASS_REG_QUAD:
1097 /* Insert bit mattern of right reg. */
1098 *output_ptr++ = reg[c & 0xf];
1101 switch (c & ARG_MASK)
1104 output_ptr = apply_fix (output_ptr, R_CALLR, da_operand, 4);
1107 output_ptr = apply_fix (output_ptr, R_REL16, da_operand, 4);
1110 output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
1118 switch (c & ARG_MASK)
1121 imm_operand->X_add_number = -imm_operand->X_add_number;
1124 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1127 imm_operand->X_add_number--;
1128 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1130 case ARG_IMMNMINUS1:
1131 imm_operand->X_add_number--;
1132 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1135 imm_operand->X_add_number = -imm_operand->X_add_number;
1137 output_ptr = apply_fix (output_ptr, R_IMM8, imm_operand, 2);
1140 output_ptr = apply_fix (output_ptr, R_IMM16, imm_operand, 4);
1144 output_ptr = apply_fix (output_ptr, R_IMM32, imm_operand, 8);
1154 /* Copy from the nibble buffer into the frag. */
1156 int length = (output_ptr - buffer) / 2;
1158 char *fragp = frag_more (length);
1160 while (src < output_ptr)
1162 *fragp = (src[0] << 4) | src[1];
1169 /* This is the guts of the machine-dependent assembler. STR points to a
1170 machine dependent instruction. This function is supposed to emit
1171 the frags/bytes it assembles to. */
1180 struct z8k_op operand[3];
1181 opcode_entry_type *opcode;
1182 opcode_entry_type *prev_opcode;
1184 /* Drop leading whitespace. */
1188 /* Find the op code end. */
1189 for (op_start = op_end = str;
1190 *op_end != 0 && *op_end != ' ';
1194 if (op_end == op_start)
1196 as_bad (_("can't find opcode "));
1202 opcode = (opcode_entry_type *) hash_find (opcode_hash_control, op_start);
1206 as_bad (_("unknown opcode"));
1210 if (opcode->opcode == 250)
1214 char *old = input_line_pointer;
1217 /* Was really a pseudo op. */
1219 input_line_pointer = op_end;
1223 while (*input_line_pointer == ' ')
1224 input_line_pointer++;
1225 p = (pseudo_typeS *) (opcode->func);
1227 (p->poc_handler) (p->poc_val);
1228 input_line_pointer = old;
1233 char *new_input_line_pointer;
1235 new_input_line_pointer = get_operands (opcode, op_end, operand);
1236 if (new_input_line_pointer)
1237 input_line_pointer = new_input_line_pointer;
1238 prev_opcode = opcode;
1240 opcode = get_specific (opcode, operand);
1244 /* Couldn't find an opcode which matched the operands. */
1245 char *where = frag_more (2);
1250 as_bad (_("Can't find opcode to match operands"));
1254 build_bytes (opcode, operand);
1259 tc_crawl_symbol_chain (headers)
1260 object_headers *headers ATTRIBUTE_UNUSED;
1262 printf (_("call to tc_crawl_symbol_chain \n"));
1266 md_undefined_symbol (name)
1267 char *name ATTRIBUTE_UNUSED;
1273 tc_headers_hook (headers)
1274 object_headers *headers ATTRIBUTE_UNUSED;
1276 printf (_("call to tc_headers_hook \n"));
1279 /* Various routines to kill one day. */
1280 /* Equal to MAX_PRECISION in atof-ieee.c. */
1281 #define MAX_LITTLENUMS 6
1283 /* Turn a string in input_line_pointer into a floating point constant
1284 of type TYPE, and store the appropriate bytes in *LITP. The number
1285 of LITTLENUMS emitted is stored in *SIZEP. An error message is
1286 returned, or NULL on OK. */
1289 md_atof (type, litP, sizeP)
1295 LITTLENUM_TYPE words[MAX_LITTLENUMS];
1296 LITTLENUM_TYPE *wordP;
1328 return _("Bad call to MD_ATOF()");
1330 t = atof_ieee (input_line_pointer, type, words);
1332 input_line_pointer = t;
1334 *sizeP = prec * sizeof (LITTLENUM_TYPE);
1335 for (wordP = words; prec--;)
1337 md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
1338 litP += sizeof (LITTLENUM_TYPE);
1343 const char *md_shortopts = "z:";
1345 struct option md_longopts[] =
1347 {NULL, no_argument, NULL, 0}
1350 size_t md_longopts_size = sizeof (md_longopts);
1353 md_parse_option (c, arg)
1360 if (!strcmp (arg, "8001"))
1362 else if (!strcmp (arg, "8002"))
1366 as_bad (_("invalid architecture -z%s"), arg);
1379 md_show_usage (stream)
1382 fprintf (stream, _("\
1384 -z8001 generate segmented code\n\
1385 -z8002 generate unsegmented code\n"));
1389 tc_aout_fix_to_chars ()
1391 printf (_("call to tc_aout_fix_to_chars \n"));
1396 md_convert_frag (headers, seg, fragP)
1397 object_headers *headers ATTRIBUTE_UNUSED;
1398 segT seg ATTRIBUTE_UNUSED;
1399 fragS *fragP ATTRIBUTE_UNUSED;
1401 printf (_("call to md_convert_frag \n"));
1406 md_section_align (seg, size)
1410 return ((size + (1 << section_alignment[(int) seg]) - 1)
1411 & (-1 << section_alignment[(int) seg]));
1415 md_apply_fix3 (fixP, valP, segment)
1418 segT segment ATTRIBUTE_UNUSED;
1420 long val = * (long *) valP;
1421 char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
1423 switch (fixP->fx_r_type)
1426 buf[0] = (buf[0] & 0xf0) | ((buf[0] + val) & 0xf);
1451 *buf++ = (val >> 8);
1455 *buf++ = (val >> 24);
1456 *buf++ = (val >> 16);
1457 *buf++ = (val >> 8);
1462 *buf++ = (val >> 16);
1464 *buf++ = (val >> 8);
1470 md_number_to_chars (buf, val, fixP->fx_size);
1477 if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
1482 md_estimate_size_before_relax (fragP, segment_type)
1483 register fragS *fragP ATTRIBUTE_UNUSED;
1484 register segT segment_type ATTRIBUTE_UNUSED;
1486 printf (_("call tomd_estimate_size_before_relax \n"));
1490 /* Put number into target byte order. */
1493 md_number_to_chars (ptr, use, nbytes)
1498 number_to_chars_bigendian (ptr, use, nbytes);
1502 md_pcrel_from (fixP)
1503 fixS *fixP ATTRIBUTE_UNUSED;
1509 tc_coff_symbol_emit_hook (s)
1510 symbolS *s ATTRIBUTE_UNUSED;
1515 tc_reloc_mangle (fix_ptr, intr, base)
1517 struct internal_reloc *intr;
1521 symbolS *symbol_ptr;
1523 if (fix_ptr->fx_addsy
1524 && fix_ptr->fx_subsy)
1526 symbolS *add = fix_ptr->fx_addsy;
1527 symbolS *sub = fix_ptr->fx_subsy;
1529 if (S_GET_SEGMENT (add) != S_GET_SEGMENT (sub))
1530 as_bad (_("Can't subtract symbols in different sections %s %s"),
1531 S_GET_NAME (add), S_GET_NAME (sub));
1534 int diff = S_GET_VALUE (add) - S_GET_VALUE (sub);
1536 fix_ptr->fx_addsy = 0;
1537 fix_ptr->fx_subsy = 0;
1538 fix_ptr->fx_offset += diff;
1541 symbol_ptr = fix_ptr->fx_addsy;
1543 /* If this relocation is attached to a symbol then it's ok
1545 if (fix_ptr->fx_r_type == 0)
1547 /* cons likes to create reloc32's whatever the size of the reloc. */
1548 switch (fix_ptr->fx_size)
1551 intr->r_type = R_IMM16;
1554 intr->r_type = R_IMM8;
1557 intr->r_type = R_IMM32;
1564 intr->r_type = fix_ptr->fx_r_type;
1566 intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
1567 intr->r_offset = fix_ptr->fx_offset;
1570 intr->r_symndx = symbol_ptr->sy_number;
1572 intr->r_symndx = -1;