1 /* tc-z8k.c -- Assemble code for the Zilog Z800n
2 Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation.
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>. */
27 #include "opcodes/z8k-opc.h"
33 const char comment_chars[] = "!";
34 const char line_comment_chars[] = "#";
35 const char line_separator_chars[] = ";";
38 extern int coff_flags;
40 const int md_reloc_size;
48 machine = bfd_mach_z8001;
56 machine = bfd_mach_z8002;
64 record_alignment (now_seg, 1);
67 void obj_coff_section ();
84 if (*input_line_pointer == '\'')
88 c = *input_line_pointer++;
93 c = (tohex (input_line_pointer[0]) << 4)
94 | tohex (input_line_pointer[1]);
95 input_line_pointer += 2;
97 FRAG_APPEND_1_CHAR (c);
98 c = *input_line_pointer++;
100 demand_empty_rest_of_line ();
104 /* This table describes all the machine specific pseudo-ops the assembler
105 has to support. The fields are:
106 pseudo-op name without dot
107 function to call to execute this pseudo-op
108 Integer arg to pass to the function
111 const pseudo_typeS md_pseudo_table[] = {
113 {"data.b" , cons , 1},
114 {"data.w" , cons , 2},
115 {"data.l" , cons , 4},
116 {"form" , listing_psize , 0},
117 {"heading", listing_title , 0},
118 {"import" , s_ignore , 0},
119 {"page" , listing_eject , 0},
120 {"program", s_ignore , 0},
121 {"z8001" , s_segm , 0},
122 {"z8002" , s_unseg , 0},
124 {"segm" , s_segm , 0},
125 {"unsegm" , s_unseg , 0},
126 {"unseg" , s_unseg , 0},
127 {"name" , s_app_file , 0},
128 {"global" , s_globl , 0},
133 {"rsect" , obj_coff_section, 0},
134 {"sect" , obj_coff_section, 0},
135 {"block" , s_space , 0},
140 const char EXP_CHARS[] = "eE";
142 /* Chars that mean this number is a floating point constant.
145 const char FLT_CHARS[] = "rRsSfFdDxXpP";
147 /* Opcode mnemonics. */
148 static struct hash_control *opcode_hash_control;
153 opcode_entry_type *opcode;
154 char *prev_name = "";
157 opcode_hash_control = hash_new ();
159 for (opcode = z8k_table; opcode->name; opcode++)
161 /* Only enter unique codes into the table. */
162 char *src = opcode->name;
164 if (strcmp (opcode->name, prev_name))
166 hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
170 prev_name = opcode->name;
173 /* Default to z8002. */
176 /* Insert the pseudo ops, too. */
177 for (idx = 0; md_pseudo_table[idx].poc_name; idx++)
179 opcode_entry_type *fake_opcode;
180 fake_opcode = (opcode_entry_type *) malloc (sizeof (opcode_entry_type));
181 fake_opcode->name = md_pseudo_table[idx].poc_name,
182 fake_opcode->func = (void *) (md_pseudo_table + idx);
183 fake_opcode->opcode = 250;
184 hash_insert (opcode_hash_control, fake_opcode->name, fake_opcode);
197 typedef struct z8k_op
199 /* 'b','w','r','q'. */
207 /* Any other register associated with the mode. */
210 /* Any expression. */
216 static expressionS *da_operand;
217 static expressionS *imm_operand;
230 if (isdigit (src[1]))
232 *reg = (src[0] - '0') * 10 + src[1] - '0';
237 *reg = (src[0] - '0');
248 WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
256 /* Try to parse a reg name. Return a pointer to the first character
257 in SRC after the reg name. */
260 parse_reg (src, mode, reg)
268 if (src[0] == 's' && src[1] == 'p')
272 *mode = CLASS_REG_LONG;
277 *mode = CLASS_REG_WORD;
286 *mode = CLASS_REG_LONG;
287 res = whatreg (reg, src + 2);
290 as_warn (_("register rr%d, out of range."), regno);
292 else if (src[1] == 'h')
294 *mode = CLASS_REG_BYTE;
295 res = whatreg (reg, src + 2);
298 as_warn (_("register rh%d, out of range."), regno);
300 else if (src[1] == 'l')
302 *mode = CLASS_REG_BYTE;
303 res = whatreg (reg, src + 2);
306 as_warn (_("register rl%d, out of range."), regno);
309 else if (src[1] == 'q')
311 *mode = CLASS_REG_QUAD;
312 res = whatreg (reg, src + 2);
315 as_warn (_("register rq%d, out of range."), regno);
319 *mode = CLASS_REG_WORD;
320 res = whatreg (reg, src + 1);
323 as_warn (_("register r%d, out of range."), regno);
334 char *save = input_line_pointer;
337 input_line_pointer = s;
339 if (op->X_op == O_absent)
340 as_bad (_("missing operand"));
341 new = input_line_pointer;
342 input_line_pointer = save;
346 /* The many forms of operand:
368 as_bad (_("expected %c"), what);
373 /* Make sure the mode supplied is the size of a word. */
376 regword (mode, string)
385 as_bad (_("register is wrong size for a word %s"), string);
389 /* Make sure the mode supplied is the size of an address. */
392 regaddr (mode, string)
398 ok = segmented_mode ? CLASS_REG_LONG : CLASS_REG_WORD;
401 as_bad (_("register is wrong size for address %s"), string);
411 struct ctrl_names ctrl_table[] = {
424 get_ctrl_operand (ptr, mode, dst)
436 mode->mode = CLASS_CTRL;
437 for (i = 0; ctrl_table[i].name; i++)
441 for (j = 0; ctrl_table[i].name[j]; j++)
443 if (ctrl_table[i].name[j] != src[j])
446 the_ctrl = ctrl_table[i].value;
463 struct flag_names flag_table[] = {
474 get_flags_operand (ptr, mode, dst)
487 mode->mode = CLASS_FLAGS;
489 for (j = 0; j <= 9; j++)
493 for (i = 0; flag_table[i].name; i++)
495 if (flag_table[i].name[0] == src[j])
497 the_flags = the_flags | flag_table[i].value;
510 struct interrupt_names
517 struct interrupt_names intr_table[] =
527 get_interrupt_operand (ptr, mode, dst)
539 mode->mode = CLASS_IMM;
540 for (i = 0; intr_table[i].name; i++)
544 for (j = 0; intr_table[i].name[j]; j++)
546 if (intr_table[i].name[j] != src[j])
549 the_interrupt = intr_table[i].value;
566 struct cc_names table[] = {
593 get_cc_operand (ptr, mode, dst)
605 mode->mode = CLASS_CC;
606 for (i = 0; table[i].name; i++)
610 for (j = 0; table[i].name[j]; j++)
612 if (table[i].name[j] != src[j])
615 the_cc = table[i].value;
625 get_operand (ptr, mode, dst)
642 mode->mode = CLASS_IMM;
643 imm_operand = &(mode->exp);
644 src = parse_exp (src + 1, &(mode->exp));
646 else if (*src == '@')
650 mode->mode = CLASS_IR;
651 src = parse_reg (src + 1, &d, &mode->reg);
657 end = parse_reg (src, &mode->mode, ®n);
667 end = parse_reg (src, &nw, &nr);
674 as_bad (_("Missing ) in ra(rb)"));
678 regaddr (mode->mode, "ra(rb) ra");
680 regword (mode->mode, "ra(rb) rb");
682 mode->mode = CLASS_BX;
692 src = parse_exp (src, &(mode->exp));
693 src = checkfor (src, ')');
694 mode->mode = CLASS_BA;
697 imm_operand = &(mode->exp);
708 /* No initial reg. */
709 src = parse_exp (src, &(mode->exp));
713 end = parse_reg (src, &(mode->mode), ®n);
714 regword (mode->mode, "addr(Ra) ra");
715 mode->mode = CLASS_X;
718 da_operand = &(mode->exp);
719 src = checkfor (end, ')');
723 /* Just an address. */
724 mode->mode = CLASS_DA;
727 da_operand = &(mode->exp);
735 get_operands (opcode, op_end, operand)
736 opcode_entry_type *opcode;
743 switch (opcode->noperands)
752 if (opcode->arg_info[0] == CLASS_CC)
754 get_cc_operand (&ptr, operand + 0, 0);
756 else if (opcode->arg_info[0] == CLASS_FLAGS)
758 get_flags_operand (&ptr, operand + 0, 0);
760 else if (opcode->arg_info[0] == (CLASS_IMM + (ARG_IMM2)))
762 get_interrupt_operand (&ptr, operand + 0, 0);
766 get_operand (&ptr, operand + 0, 0);
774 if (opcode->arg_info[0] == CLASS_CC)
776 get_cc_operand (&ptr, operand + 0, 0);
778 else if (opcode->arg_info[0] == CLASS_CTRL)
780 get_ctrl_operand (&ptr, operand + 0, 0);
784 get_operand (&ptr, operand + 0, 0);
789 get_ctrl_operand (&ptr, operand + 1, 1);
795 get_operand (&ptr, operand + 0, 0);
801 get_operand (&ptr, operand + 1, 1);
806 get_operand (&ptr, operand + 0, 0);
809 get_operand (&ptr, operand + 1, 1);
812 get_operand (&ptr, operand + 2, 2);
817 get_operand (&ptr, operand + 0, 0);
820 get_operand (&ptr, operand + 1, 1);
823 get_operand (&ptr, operand + 2, 2);
826 get_cc_operand (&ptr, operand + 3, 3);
836 /* Passed a pointer to a list of opcodes which use different
837 addressing modes. Return the opcode which matches the opcodes
840 static opcode_entry_type *
841 get_specific (opcode, operands)
842 opcode_entry_type *opcode;
846 opcode_entry_type *this_try = opcode;
848 unsigned int noperands = opcode->noperands;
850 unsigned int dispreg;
851 unsigned int this_index = opcode->idx;
853 while (this_index == opcode->idx && !found)
858 for (i = 0; i < noperands; i++)
860 int mode = operands[i].mode;
862 if ((mode & CLASS_MASK) != (this_try->arg_info[i] & CLASS_MASK))
864 /* It could be an pc rel operand, if this is a da mode
865 and we like disps, then insert it. */
867 if (mode == CLASS_DA && this_try->arg_info[i] == CLASS_DISP)
869 /* This is the case. */
870 operands[i].mode = CLASS_DISP;
872 else if (mode == CLASS_BA && this_try->arg_info[i])
874 /* Can't think of a way to turn what we've been
875 given into something that's OK. */
878 else if (this_try->arg_info[i] & CLASS_PR)
880 if (mode == CLASS_REG_LONG && segmented_mode)
884 else if (mode == CLASS_REG_WORD && !segmented_mode)
894 switch (mode & CLASS_MASK)
909 reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
925 check_operand (operand, width, string)
926 struct z8k_op *operand;
930 if (operand->exp.X_add_symbol == 0
931 && operand->exp.X_op_symbol == 0)
934 /* No symbol involved, let's look at offset, it's dangerous if
935 any of the high bits are not 0 or ff's, find out by oring or
936 anding with the width and seeing if the answer is 0 or all
938 if ((operand->exp.X_add_number & ~width) != 0 &&
939 (operand->exp.X_add_number | width) != (~0))
941 as_warn (_("operand %s0x%x out of range."),
942 string, operand->exp.X_add_number);
948 static char buffer[20];
951 newfix (ptr, type, operand)
954 expressionS *operand;
956 if (operand->X_add_symbol
957 || operand->X_op_symbol
958 || operand->X_add_number)
960 fix_new_exp (frag_now,
970 apply_fix (ptr, type, operand, size)
973 expressionS *operand;
976 int n = operand->X_add_number;
978 operand->X_add_number = n;
979 newfix ((ptr - buffer) / 2, type, operand);
983 case 8: /* 8 nibbles == 32 bits */
988 case 4: /* 4 niblles == 16 bits */
1002 /* Now we know what sort of opcodes it is. Let's build the bytes. */
1004 #define INSERT(x,y) *x++ = y>>24; *x++ = y>> 16; *x++=y>>8; *x++ =y;
1006 build_bytes (this_try, operand)
1007 opcode_entry_type *this_try;
1008 struct z8k_op *operand;
1014 char *output_ptr = buffer;
1020 unsigned int *class_ptr;
1022 frag_wane (frag_now);
1025 memset (buffer, 20, 0);
1026 class_ptr = this_try->byte_info;
1029 for (nibble = 0; c = *class_ptr++; nibble++)
1032 switch (c & CLASS_MASK)
1038 /* Direct address, we don't cope with the SS mode right now. */
1041 da_operand->X_add_number |= 0x80000000;
1042 output_ptr = apply_fix (output_ptr, R_IMM32, da_operand, 8);
1046 output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
1052 output_ptr = apply_fix (output_ptr, R_JR, da_operand, 2);
1059 output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
1066 output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
1067 output_ptr[-2] = 0x8;
1071 case CLASS_BIT_1OR2:
1072 *output_ptr = c & 0xf;
1075 if (imm_operand->X_add_number == 2)
1077 else if (imm_operand->X_add_number != 1)
1078 as_bad (_("immediate must be 1 or 2"));
1081 as_bad (_("immediate 1 or 2 expected"));
1085 *output_ptr++ = the_cc;
1088 *output_ptr++ = the_ctrl;
1091 *output_ptr++ = the_ctrl | 0x8;
1094 *output_ptr++ = (~the_interrupt & 0x3);
1097 *output_ptr++ = (~the_interrupt & 0x3) | 0x4;
1100 *output_ptr++ = the_flags;
1103 *output_ptr++ = c & 0xf;
1106 if (reg[c & 0xf] == 0)
1107 as_bad (_("can't use R0 here"));
1110 case CLASS_REG_BYTE:
1111 case CLASS_REG_WORD:
1112 case CLASS_REG_LONG:
1113 case CLASS_REG_QUAD:
1114 /* Insert bit mattern of right reg. */
1115 *output_ptr++ = reg[c & 0xf];
1118 output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
1125 switch (c & ARG_MASK)
1128 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1131 imm_operand->X_add_number--;
1132 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1134 case ARG_IMMNMINUS1:
1135 imm_operand->X_add_number--;
1136 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1139 imm_operand->X_add_number = -imm_operand->X_add_number;
1141 output_ptr = apply_fix (output_ptr, R_IMM8, imm_operand, 2);
1144 output_ptr = apply_fix (output_ptr, R_IMM16, imm_operand, 4);
1148 output_ptr = apply_fix (output_ptr, R_IMM32, imm_operand, 8);
1158 /* Copy from the nibble buffer into the frag. */
1160 int length = (output_ptr - buffer) / 2;
1162 char *fragp = frag_more (length);
1164 while (src < output_ptr)
1166 *fragp = (src[0] << 4) | src[1];
1173 /* This is the guts of the machine-dependent assembler. STR points to a
1174 machine dependent instruction. This function is supposed to emit
1175 the frags/bytes it assembles to. */
1184 struct z8k_op operand[3];
1185 opcode_entry_type *opcode;
1186 opcode_entry_type *prev_opcode;
1191 /* Drop leading whitespace. */
1195 /* Find the op code end. */
1196 for (op_start = op_end = str;
1197 *op_end != 0 && *op_end != ' ';
1201 if (op_end == op_start)
1203 as_bad (_("can't find opcode "));
1209 opcode = (opcode_entry_type *) hash_find (opcode_hash_control, op_start);
1213 as_bad (_("unknown opcode"));
1217 if (opcode->opcode == 250)
1219 /* Was really a pseudo op. */
1224 char *old = input_line_pointer;
1227 input_line_pointer = op_end;
1231 while (*input_line_pointer == ' ')
1232 input_line_pointer++;
1233 p = (pseudo_typeS *) (opcode->func);
1235 (p->poc_handler) (p->poc_val);
1236 input_line_pointer = old;
1241 input_line_pointer = get_operands (opcode, op_end, operand);
1242 prev_opcode = opcode;
1244 opcode = get_specific (opcode, operand);
1248 /* Couldn't find an opcode which matched the operands. */
1249 char *where = frag_more (2);
1254 as_bad (_("Can't find opcode to match operands"));
1258 build_bytes (opcode, operand);
1263 tc_crawl_symbol_chain (headers)
1264 object_headers *headers;
1266 printf (_("call to tc_crawl_symbol_chain \n"));
1270 md_undefined_symbol (name)
1277 tc_headers_hook (headers)
1278 object_headers *headers;
1280 printf (_("call to tc_headers_hook \n"));
1283 /* Various routines to kill one day. */
1284 /* Equal to MAX_PRECISION in atof-ieee.c. */
1285 #define MAX_LITTLENUMS 6
1287 /* Turn a string in input_line_pointer into a floating point constant
1288 of type TYPE, and store the appropriate bytes in *LITP. The number
1289 of LITTLENUMS emitted is stored in *SIZEP. An error message is
1290 returned, or NULL on OK. */
1293 md_atof (type, litP, sizeP)
1299 LITTLENUM_TYPE words[MAX_LITTLENUMS];
1300 LITTLENUM_TYPE *wordP;
1332 return _("Bad call to MD_ATOF()");
1334 t = atof_ieee (input_line_pointer, type, words);
1336 input_line_pointer = t;
1338 *sizeP = prec * sizeof (LITTLENUM_TYPE);
1339 for (wordP = words; prec--;)
1341 md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
1342 litP += sizeof (LITTLENUM_TYPE);
1347 CONST char *md_shortopts = "z:";
1349 struct option md_longopts[] = {
1350 {NULL, no_argument, NULL, 0}
1353 size_t md_longopts_size = sizeof (md_longopts);
1356 md_parse_option (c, arg)
1363 if (!strcmp (arg, "8001"))
1365 else if (!strcmp (arg, "8002"))
1369 as_bad (_("invalid architecture -z%s"), arg);
1382 md_show_usage (stream)
1385 fprintf (stream, _("\
1387 -z8001 generate segmented code\n\
1388 -z8002 generate unsegmented code\n"));
1392 tc_aout_fix_to_chars ()
1394 printf (_("call to tc_aout_fix_to_chars \n"));
1399 md_convert_frag (headers, seg, fragP)
1400 object_headers *headers;
1404 printf (_("call to md_convert_frag \n"));
1409 md_section_align (seg, size)
1413 return ((size + (1 << section_alignment[(int) seg]) - 1)
1414 & (-1 << section_alignment[(int) seg]));
1419 md_apply_fix (fixP, val)
1423 char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
1425 switch (fixP->fx_r_type)
1428 buf[0] = (buf[0] & 0xf0) | ((buf[0] + val) & 0xf);
1453 *buf++ = (val >> 8);
1457 *buf++ = (val >> 24);
1458 *buf++ = (val >> 16);
1459 *buf++ = (val >> 8);
1464 *buf++ = (val >> 16);
1466 *buf++ = (val >> 8);
1472 md_number_to_chars (buf, val, fixP->fx_size);
1481 md_estimate_size_before_relax (fragP, segment_type)
1482 register fragS *fragP;
1483 register segT segment_type;
1485 printf (_("call tomd_estimate_size_before_relax \n"));
1489 /* Put number into target byte order. */
1492 md_number_to_chars (ptr, use, nbytes)
1497 number_to_chars_bigendian (ptr, use, nbytes);
1501 md_pcrel_from (fixP)
1508 tc_coff_symbol_emit_hook (s)
1514 tc_reloc_mangle (fix_ptr, intr, base)
1516 struct internal_reloc *intr;
1520 symbolS *symbol_ptr;
1522 if (fix_ptr->fx_addsy
1523 && fix_ptr->fx_subsy)
1525 symbolS *add = fix_ptr->fx_addsy;
1526 symbolS *sub = fix_ptr->fx_subsy;
1528 if (S_GET_SEGMENT (add) != S_GET_SEGMENT (sub))
1529 as_bad (_("Can't subtract symbols in different sections %s %s"),
1530 S_GET_NAME (add), S_GET_NAME (sub));
1533 int diff = S_GET_VALUE (add) - S_GET_VALUE (sub);
1535 fix_ptr->fx_addsy = 0;
1536 fix_ptr->fx_subsy = 0;
1537 fix_ptr->fx_offset += diff;
1540 symbol_ptr = fix_ptr->fx_addsy;
1542 /* If this relocation is attached to a symbol then it's ok
1544 if (fix_ptr->fx_r_type == 0)
1546 /* cons likes to create reloc32's whatever the size of the reloc. */
1547 switch (fix_ptr->fx_size)
1550 intr->r_type = R_IMM16;
1553 intr->r_type = R_IMM8;
1556 intr->r_type = R_IMM32;
1563 intr->r_type = fix_ptr->fx_r_type;
1565 intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
1566 intr->r_offset = fix_ptr->fx_offset;
1569 intr->r_symndx = symbol_ptr->sy_number;
1571 intr->r_symndx = -1;