1 /* tc-a29k.c -- Assemble for the AMD 29000.
2 Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1998, 2000, 2001
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 /* John Gilmore has reorganized this module somewhat, to make it easier
23 to convert it to new machines' assemblers as desired. There was too
24 much bloody rewriting required before. There still probably is. */
27 #include "safe-ctype.h"
29 #include "opcode/a29k.h"
31 /* Make it easier to clone this machine desc into another one. */
32 #define machine_opcode a29k_opcode
33 #define machine_opcodes a29k_opcodes
34 #define machine_ip a29k_ip
35 #define machine_it a29k_it
37 #define IMMEDIATE_BIT 0x01000000 /* Turns RB into Immediate */
38 #define ABSOLUTE_BIT 0x01000000 /* Turns PC-relative to Absolute */
39 #define CE_BIT 0x00800000 /* Coprocessor enable in LOAD */
40 #define UI_BIT 0x00000080 /* Unsigned integer in CONVERT */
42 /* handle of the OPCODE hash table */
43 static struct hash_control *op_hash = NULL;
52 int reloc_offset; /* Offset of reloc within insn */
58 static void machine_ip PARAMS ((char *str));
59 /* static void print_insn PARAMS ((struct machine_it *insn)); */
61 static void s_data1 PARAMS ((void));
62 static void s_use PARAMS ((int));
68 {"align", s_align_bytes, 4},
69 {"block", s_space, 0},
70 {"cputype", s_ignore, 0}, /* CPU as 29000 or 29050 */
71 {"reg", s_lsym, 0}, /* Register equate, same as equ */
72 {"space", s_ignore, 0}, /* Listing control */
73 {"sect", s_ignore, 0}, /* Creation of coff sections */
75 /* We can do this right with coff. */
82 #if defined(BFD_HEADERS)
84 const int md_reloc_size = RELSZ; /* Coff headers */
86 const int md_reloc_size = 12; /* something else headers */
89 const int md_reloc_size = 12; /* Not bfdized*/
92 /* This array holds the chars that always start a comment. If the
93 pre-processor is disabled, these aren't very useful */
94 const char comment_chars[] = ";";
96 /* This array holds the chars that only start a comment at the beginning of
97 a line. If the line seems to have the form '# 123 filename'
98 .line and .file directives will appear in the pre-processed output */
99 /* Note that input_file.c hand checks for '#' at the beginning of the
100 first line of the input file. This is because the compiler outputs
101 #NO_APP at the beginning of its output. */
102 /* Also note that comments like this one will always work */
103 const char line_comment_chars[] = "#";
105 /* We needed an unused char for line separation to work around the
106 lack of macros, using sed and such. */
107 const char line_separator_chars[] = "@";
109 /* Chars that can be used to separate mant from exp in floating point nums */
110 const char EXP_CHARS[] = "eE";
112 /* Chars that mean this number is a floating point constant */
115 const char FLT_CHARS[] = "rRsSfFdDxXpP";
117 /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
118 changed in read.c. Ideally it shouldn't have to know about it at
119 all, but nothing is ideal around here. */
122 * anull bit - causes the branch delay slot instructions to not be executed
124 #define ANNUL (1 << 29)
132 if (strncmp (input_line_pointer, ".text", 5) == 0)
134 input_line_pointer += 5;
138 if (strncmp (input_line_pointer, ".data", 5) == 0)
140 input_line_pointer += 5;
144 if (strncmp (input_line_pointer, ".data1", 6) == 0)
146 input_line_pointer += 6;
150 /* Literals can't go in the text segment because you can't read from
151 instruction memory on some 29k's. So, into initialized data. */
152 if (strncmp (input_line_pointer, ".lit", 4) == 0)
154 input_line_pointer += 4;
155 subseg_set (SEG_DATA, 200);
156 demand_empty_rest_of_line ();
160 as_bad (_("Unknown segment type"));
161 demand_empty_rest_of_line ();
167 subseg_set (SEG_DATA, 1);
168 demand_empty_rest_of_line ();
171 #endif /* OBJ_COFF */
173 /* Install symbol definition that maps REGNAME to REGNO.
174 FIXME-SOON: These are not recognized in mixed case. */
177 insert_sreg (regname, regnum)
181 /* FIXME-SOON, put something in these syms so they won't be output
182 to the symbol table of the resulting object file. */
184 /* Must be large enough to hold the names of the special registers. */
188 symbol_table_insert (symbol_new (regname, SEG_REGISTER, (valueT) regnum,
189 &zero_address_frag));
190 for (i = 0; regname[i]; i++)
191 buf[i] = TOUPPER (regname[i]);
194 symbol_table_insert (symbol_new (buf, SEG_REGISTER, (valueT) regnum,
195 &zero_address_frag));
198 /* Install symbol definitions for assorted special registers.
199 See ASM29K Ref page 2-9. */
206 /* Protected special-purpose register names */
207 insert_sreg ("vab", SREG + 0);
208 insert_sreg ("ops", SREG + 1);
209 insert_sreg ("cps", SREG + 2);
210 insert_sreg ("cfg", SREG + 3);
211 insert_sreg ("cha", SREG + 4);
212 insert_sreg ("chd", SREG + 5);
213 insert_sreg ("chc", SREG + 6);
214 insert_sreg ("rbp", SREG + 7);
215 insert_sreg ("tmc", SREG + 8);
216 insert_sreg ("tmr", SREG + 9);
217 insert_sreg ("pc0", SREG + 10);
218 insert_sreg ("pc1", SREG + 11);
219 insert_sreg ("pc2", SREG + 12);
220 insert_sreg ("mmu", SREG + 13);
221 insert_sreg ("lru", SREG + 14);
223 /* Additional protected special-purpose registers for the 29050 */
224 insert_sreg ("rsn", SREG + 15);
225 insert_sreg ("rma0", SREG + 16);
226 insert_sreg ("rmc0", SREG + 17);
227 insert_sreg ("rma1", SREG + 18);
228 insert_sreg ("rmc1", SREG + 19);
229 insert_sreg ("spc0", SREG + 20);
230 insert_sreg ("spc1", SREG + 21);
231 insert_sreg ("spc2", SREG + 22);
232 insert_sreg ("iba0", SREG + 23);
233 insert_sreg ("ibc0", SREG + 24);
234 insert_sreg ("iba1", SREG + 25);
235 insert_sreg ("ibc1", SREG + 26);
237 /* Additional registers for the 29040. */
238 insert_sreg ("dba", SREG + 27);
239 insert_sreg ("dbc", SREG + 28);
240 insert_sreg ("cir", SREG + 29);
241 insert_sreg ("cdr", SREG + 30);
243 /* Unprotected special-purpose register names */
244 insert_sreg ("ipc", SREG + 128);
245 insert_sreg ("ipa", SREG + 129);
246 insert_sreg ("ipb", SREG + 130);
247 insert_sreg ("q", SREG + 131);
248 insert_sreg ("alu", SREG + 132);
249 insert_sreg ("bp", SREG + 133);
250 insert_sreg ("fc", SREG + 134);
251 insert_sreg ("cr", SREG + 135);
252 insert_sreg ("fpe", SREG + 160);
253 insert_sreg ("inte", SREG + 161);
254 insert_sreg ("fps", SREG + 162);
255 /* "", SREG+163); Reserved */
256 insert_sreg ("exop", SREG + 164);
259 /* This function is called once, at assembler startup time. It should
260 set up all the tables, etc., that the MD part of the assembler will
265 register const char *retval = NULL;
267 register int skipnext = 0;
268 register unsigned int i;
269 register char *strend, *strend2;
271 /* Hash up all the opcodes for fast use later. */
273 op_hash = hash_new ();
275 for (i = 0; i < num_opcodes; i++)
277 const char *name = machine_opcodes[i].name;
285 /* Hack to avoid multiple opcode entries. We pre-locate all the
286 variations (b/i field and P/A field) and handle them. */
288 if (!strcmp (name, machine_opcodes[i + 1].name))
290 if ((machine_opcodes[i].opcode & 0x01000000) != 0
291 || (machine_opcodes[i + 1].opcode & 0x01000000) == 0
292 || ((machine_opcodes[i].opcode | 0x01000000)
293 != machine_opcodes[i + 1].opcode))
295 strend = machine_opcodes[i].args + strlen (machine_opcodes[i].args) - 1;
296 strend2 = machine_opcodes[i + 1].args + strlen (machine_opcodes[i + 1].args) - 1;
309 fprintf (stderr, "internal error: can't handle opcode %s\n",
314 /* OK, this is an i/b or A/P pair. We skip the
315 higher-valued one, and let the code for operand checking
316 handle OR-ing in the bit. */
320 retval = hash_insert (op_hash, name, (PTR) &machine_opcodes[i]);
323 fprintf (stderr, "internal error: can't hash `%s': %s\n",
324 machine_opcodes[i].name, retval);
330 as_fatal (_("Broken assembler. No assembly attempted."));
335 /* Assemble a single instruction. Its label has already been handled
336 by the generic front end. We just parse opcode and operands, and
337 produce the bytes of data and relocation. */
348 /* put out the opcode */
349 md_number_to_chars (toP, the_insn.opcode, 4);
351 /* put out the symbol-dependent stuff */
352 if (the_insn.reloc != NO_RELOC)
354 fix_new_exp (frag_now,
355 (toP - frag_now->fr_literal + the_insn.reloc_offset),
364 parse_operand (s, operandp, opt)
366 expressionS *operandp;
369 char *save = input_line_pointer;
372 input_line_pointer = s;
373 expression (operandp);
374 if (operandp->X_op == O_absent && ! opt)
375 as_bad (_("missing operand"));
376 new = input_line_pointer;
377 input_line_pointer = save;
381 /* Instruction parsing. Takes a string containing the opcode.
382 Operands are at input_line_pointer. Output is in the_insn.
383 Warnings or errors are generated. */
391 struct machine_opcode *insn;
393 unsigned long opcode;
394 expressionS the_operand;
395 expressionS *operand = &the_operand;
398 /* Must handle `div0' opcode. */
401 for (; ISALNUM (*s); ++s)
409 case ' ': /* FIXME-SOMEDAY more whitespace */
414 as_bad (_("Unknown opcode: `%s'"), str);
417 if ((insn = (struct machine_opcode *) hash_find (op_hash, str)) == NULL)
419 as_bad (_("Unknown opcode `%s'."), str);
423 opcode = insn->opcode;
424 memset (&the_insn, '\0', sizeof (the_insn));
425 the_insn.reloc = NO_RELOC;
427 /* Build the opcode, checking as we go to make sure that the
430 If an operand matches, we modify the_insn or opcode appropriately,
431 and do a "continue". If an operand fails to match, we "break". */
433 if (insn->args[0] != '\0')
435 /* Prime the pump. */
436 s = parse_operand (s, operand, insn->args[0] == 'I');
439 for (args = insn->args;; ++args)
444 case '\0': /* end of args */
447 /* We are truly done. */
448 the_insn.opcode = opcode;
451 as_bad (_("Too many operands: %s"), s);
454 case ',': /* Must match a comma */
457 /* Parse next operand. */
458 s = parse_operand (s, operand, args[1] == 'I');
463 case 'v': /* Trap numbers (immediate field) */
464 if (operand->X_op == O_constant)
466 if (operand->X_add_number < 256)
468 opcode |= (operand->X_add_number << 16);
473 as_bad (_("Immediate value of %ld is too large"),
474 (long) operand->X_add_number);
478 the_insn.reloc = RELOC_8;
479 the_insn.reloc_offset = 1; /* BIG-ENDIAN Byte 1 of insn */
480 the_insn.exp = *operand;
483 case 'b': /* A general register or 8-bit immediate */
485 /* We treat the two cases identically since we mashed
486 them together in the opcode table. */
487 if (operand->X_op == O_register)
490 /* Make sure the 'i' case really exists. */
491 if ((insn->opcode | IMMEDIATE_BIT) != (insn + 1)->opcode)
494 opcode |= IMMEDIATE_BIT;
495 if (operand->X_op == O_constant)
497 if (operand->X_add_number < 256)
499 opcode |= operand->X_add_number;
504 as_bad (_("Immediate value of %ld is too large"),
505 (long) operand->X_add_number);
509 the_insn.reloc = RELOC_8;
510 the_insn.reloc_offset = 3; /* BIG-ENDIAN Byte 3 of insn */
511 the_insn.exp = *operand;
514 case 'a': /* next operand must be a register */
517 /* lrNNN or grNNN or %%expr or a user-def register name */
518 if (operand->X_op != O_register)
519 break; /* Only registers */
520 know (operand->X_add_symbol == 0);
521 know (operand->X_op_symbol == 0);
522 reg = operand->X_add_number;
524 break; /* No special registers */
526 /* Got the register, now figure out where it goes in the
543 as_fatal (_("failed sanity check."));
546 case 'x': /* 16 bit constant, zero-extended */
547 case 'X': /* 16 bit constant, one-extended */
548 if (operand->X_op == O_constant)
550 opcode |= (operand->X_add_number & 0xFF) << 0 |
551 ((operand->X_add_number & 0xFF00) << 8);
554 the_insn.reloc = RELOC_CONST;
555 the_insn.exp = *operand;
559 if (operand->X_op == O_constant)
561 opcode |= (operand->X_add_number & 0x00FF0000) >> 16 |
562 (((unsigned long) operand->X_add_number
563 /* avoid sign ext */ & 0xFF000000) >> 8);
566 the_insn.reloc = RELOC_CONSTH;
567 the_insn.exp = *operand;
570 case 'P': /* PC-relative jump address */
571 case 'A': /* Absolute jump address */
572 /* These two are treated together since we folded the
573 opcode table entries together. */
574 if (operand->X_op == O_constant)
576 /* Make sure the 'A' case really exists. */
577 if ((insn->opcode | ABSOLUTE_BIT) != (insn + 1)->opcode)
582 v = operand->X_add_number & ~ mask;
584 as_bad ("call/jmp target out of range");
586 opcode |= ABSOLUTE_BIT |
587 (operand->X_add_number & 0x0003FC00) << 6 |
588 ((operand->X_add_number & 0x000003FC) >> 2);
591 the_insn.reloc = RELOC_JUMPTARG;
592 the_insn.exp = *operand;
593 the_insn.pcrel = 1; /* Assume PC-relative jump */
594 /* FIXME-SOON, Do we figure out whether abs later, after
598 case 'e': /* Coprocessor enable bit for LOAD/STORE insn */
599 if (operand->X_op == O_constant)
601 if (operand->X_add_number == 0)
603 if (operand->X_add_number == 1)
611 case 'n': /* Control bits for LOAD/STORE instructions */
612 if (operand->X_op == O_constant &&
613 operand->X_add_number < 128)
615 opcode |= (operand->X_add_number << 16);
620 case 's': /* Special register number */
621 if (operand->X_op != O_register)
622 break; /* Only registers */
623 if (operand->X_add_number < SREG)
624 break; /* Not a special register */
625 opcode |= (operand->X_add_number & 0xFF) << 8;
628 case 'u': /* UI bit of CONVERT */
629 if (operand->X_op == O_constant)
631 if (operand->X_add_number == 0)
633 if (operand->X_add_number == 1)
641 case 'r': /* RND bits of CONVERT */
642 if (operand->X_op == O_constant &&
643 operand->X_add_number < 8)
645 opcode |= operand->X_add_number << 4;
650 case 'I': /* ID bits of INV and IRETINV. */
651 /* This operand is optional. */
652 if (operand->X_op == O_absent)
654 else if (operand->X_op == O_constant
655 && operand->X_add_number < 4)
657 opcode |= operand->X_add_number << 16;
662 case 'd': /* FD bits of CONVERT */
663 if (operand->X_op == O_constant &&
664 operand->X_add_number < 4)
666 opcode |= operand->X_add_number << 2;
671 case 'f': /* FS bits of CONVERT */
672 if (operand->X_op == O_constant &&
673 operand->X_add_number < 4)
675 opcode |= operand->X_add_number << 0;
681 if (operand->X_op == O_constant &&
682 operand->X_add_number < 4)
684 opcode |= operand->X_add_number << 16;
690 if (operand->X_op == O_constant &&
691 operand->X_add_number < 16)
693 opcode |= operand->X_add_number << 18;
701 /* Types or values of args don't match. */
702 as_bad ("Invalid operands");
707 /* This is identical to the md_atof in m68k.c. I think this is right,
710 Turn a string in input_line_pointer into a floating point constant
711 of type TYPE, and store the appropriate bytes in *LITP. The number
712 of LITTLENUMS emitted is stored in *SIZEP. An error message is
713 returned, or NULL on OK. */
715 /* Equal to MAX_PRECISION in atof-ieee.c */
716 #define MAX_LITTLENUMS 6
719 md_atof (type, litP, sizeP)
725 LITTLENUM_TYPE words[MAX_LITTLENUMS];
726 LITTLENUM_TYPE *wordP;
758 return "Bad call to MD_ATOF()";
760 t = atof_ieee (input_line_pointer, type, words);
762 input_line_pointer = t;
763 *sizeP = prec * sizeof (LITTLENUM_TYPE);
764 for (wordP = words; prec--;)
766 md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE));
767 litP += sizeof (LITTLENUM_TYPE);
773 * Write out big-endian.
776 md_number_to_chars (buf, val, n)
781 number_to_chars_bigendian (buf, val, n);
785 md_apply_fix3 (fixP, valP, seg)
788 segT seg ATTRIBUTE_UNUSED;
790 long val = * (long *) valP;
791 char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
793 fixP->fx_addnumber = val; /* Remember value for emit_reloc. */
795 know (fixP->fx_size == 4);
796 know (fixP->fx_r_type < NO_RELOC);
798 /* This is a hack. There should be a better way to handle this. */
799 if (fixP->fx_r_type == RELOC_WDISP30 && fixP->fx_addsy)
800 val += fixP->fx_where + fixP->fx_frag->fr_address;
802 switch (fixP->fx_r_type)
816 val = (val >>= 2) + 1;
817 buf[0] |= (val >> 24) & 0x3f;
818 buf[1] = (val >> 16);
824 buf[1] |= (val >> 26) & 0x3f;
830 buf[2] |= (val >> 8) & 0x03;
835 buf[2] |= (val >> 8) & 0x1f;
840 val = (val >>= 2) + 1;
843 buf[1] |= (val >> 16) & 0x3f;
848 case RELOC_JUMPTARG: /* 00XX00XX pattern in a word */
851 /* The linker tries to support both AMD and old GNU style
852 R_IREL relocs. That means that if the addend is exactly
853 the negative of the address within the section, the
854 linker will not handle it correctly. */
857 && val == - (fixP->fx_frag->fr_address + fixP->fx_where))
859 (fixP->fx_file, fixP->fx_line,
860 "the linker will not handle this relocation correctly");
862 else if (fixP->fx_pcrel)
866 if (v != 0 && v != -1)
867 as_bad_where (fixP->fx_file, fixP->fx_line,
868 "call/jmp target out of range");
871 /* This case was supposed to be handled in machine_ip. */
873 buf[1] = val >> 10; /* Holds bits 0003FFFC of address */
877 case RELOC_CONST: /* 00XX00XX pattern in a word */
878 buf[1] = val >> 8; /* Holds bits 0000XXXX */
882 case RELOC_CONSTH: /* 00XX00XX pattern in a word */
883 buf[1] = val >> 24; /* Holds bits XXXX0000 */
889 as_bad (_("bad relocation type: 0x%02x"), fixP->fx_r_type);
893 if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
899 tc_coff_fix2rtype (fixP)
903 switch (fixP->fx_r_type)
916 printf (_("need %o3\n"), fixP->fx_r_type);
918 } /* switch on type */
923 #endif /* OBJ_COFF */
925 /* should never be called for 29k */
927 md_convert_frag (headers, seg, fragP)
928 object_headers *headers;
930 register fragS *fragP;
932 as_fatal (_("a29k_convert_frag\n"));
935 /* should never be called for a29k */
937 md_estimate_size_before_relax (fragP, segtype)
938 register fragS *fragP;
941 as_fatal (_("a29k_estimate_size_before_relax\n"));
946 /* for debugging only */
949 struct machine_it *insn;
982 fprintf (stderr, "ERROR: %s\n");
984 fprintf (stderr, "opcode=0x%08x\n", insn->opcode);
985 fprintf (stderr, "reloc = %s\n", Reloc[insn->reloc]);
986 fprintf (stderr, "exp = {\n");
987 fprintf (stderr, "\t\tX_add_symbol = %s\n",
988 insn->exp.X_add_symbol ?
989 (S_GET_NAME (insn->exp.X_add_symbol) ?
990 S_GET_NAME (insn->exp.X_add_symbol) : "???") : "0");
991 fprintf (stderr, "\t\tX_op_symbol = %s\n",
992 insn->exp.X_op_symbol ?
993 (S_GET_NAME (insn->exp.X_op_symbol) ?
994 S_GET_NAME (insn->exp.X_op_symbol) : "???") : "0");
995 fprintf (stderr, "\t\tX_add_number = %d\n",
996 insn->exp.X_add_number);
997 fprintf (stderr, "}\n");
1002 /* Translate internal representation of relocation info to target format.
1004 On sparc/29k: first 4 bytes are normal unsigned long address, next three
1005 bytes are index, most sig. byte first. Byte 7 is broken up with
1006 bit 7 as external, bits 6 & 5 unused, and the lower
1007 five bits as relocation type. Next 4 bytes are long addend. */
1008 /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */
1013 tc_aout_fix_to_chars (where, fixP, segment_address_in_file)
1016 relax_addressT segment_address_in_file;
1020 know (fixP->fx_r_type < NO_RELOC);
1021 know (fixP->fx_addsy != NULL);
1023 md_number_to_chars (where,
1024 fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file,
1027 r_symbolnum = (S_IS_DEFINED (fixP->fx_addsy)
1028 ? S_GET_TYPE (fixP->fx_addsy)
1029 : fixP->fx_addsy->sy_number);
1031 where[4] = (r_symbolnum >> 16) & 0x0ff;
1032 where[5] = (r_symbolnum >> 8) & 0x0ff;
1033 where[6] = r_symbolnum & 0x0ff;
1034 where[7] = (((!S_IS_DEFINED (fixP->fx_addsy)) << 7) & 0x80) | (0 & 0x60) | (fixP->fx_r_type & 0x1F);
1036 md_number_to_chars (&where[8], fixP->fx_addnumber, 4);
1039 #endif /* OBJ_AOUT */
1041 CONST char *md_shortopts = "";
1042 struct option md_longopts[] = {
1043 {NULL, no_argument, NULL, 0}
1045 size_t md_longopts_size = sizeof (md_longopts);
1048 md_parse_option (c, arg)
1056 md_show_usage (stream)
1061 /* This is called when a line is unrecognized. This is used to handle
1062 definitions of a29k style local labels. */
1065 a29k_unrecognized_line (c)
1072 || ! ISDIGIT (input_line_pointer[0]))
1075 s = input_line_pointer;
1078 while (ISDIGIT (*s))
1080 lab = lab * 10 + *s - '0';
1086 /* Not a label definition. */
1090 if (dollar_label_defined (lab))
1092 as_bad (_("label \"$%d\" redefined"), lab);
1096 define_dollar_label (lab);
1097 colon (dollar_label_name (lab, 0));
1098 input_line_pointer = s + 1;
1103 /* Default the values of symbols known that should be "predefined". We
1104 don't bother to predefine them unless you actually use one, since there
1105 are a lot of them. */
1108 md_undefined_symbol (name)
1112 char testbuf[5 + /*SLOP*/ 5];
1114 if (name[0] == 'g' || name[0] == 'G'
1115 || name[0] == 'l' || name[0] == 'L'
1116 || name[0] == 's' || name[0] == 'S')
1118 /* Perhaps a global or local register name */
1119 if (name[1] == 'r' || name[1] == 'R')
1123 /* Parse the number, make sure it has no extra zeroes or
1125 regnum = atol (&name[2]);
1127 if (name[0] == 's' || name[0] == 'S')
1131 if (regnum > maxreg)
1134 sprintf (testbuf, "%ld", regnum);
1135 if (strcmp (testbuf, &name[2]) != 0)
1136 return NULL; /* gr007 or lr7foo or whatever */
1138 /* We have a wiener! Define and return a new symbol for it. */
1139 if (name[0] == 'l' || name[0] == 'L')
1141 else if (name[0] == 's' || name[0] == 'S')
1143 return (symbol_new (name, SEG_REGISTER, (valueT) regnum,
1144 &zero_address_frag));
1151 /* Parse an operand that is machine-specific. */
1154 md_operand (expressionP)
1155 expressionS *expressionP;
1158 if (input_line_pointer[0] == '%' && input_line_pointer[1] == '%')
1160 /* We have a numeric register expression. No biggy. */
1161 input_line_pointer += 2; /* Skip %% */
1162 (void) expression (expressionP);
1163 if (expressionP->X_op != O_constant
1164 || expressionP->X_add_number > 255)
1165 as_bad (_("Invalid expression after %%%%\n"));
1166 expressionP->X_op = O_register;
1168 else if (input_line_pointer[0] == '&')
1170 /* We are taking the 'address' of a register...this one is not
1171 in the manual, but it *is* in traps/fpsymbol.h! What they
1172 seem to want is the register number, as an absolute number. */
1173 input_line_pointer++; /* Skip & */
1174 (void) expression (expressionP);
1175 if (expressionP->X_op != O_register)
1176 as_bad (_("Invalid register in & expression"));
1178 expressionP->X_op = O_constant;
1180 else if (input_line_pointer[0] == '$'
1181 && ISDIGIT (input_line_pointer[1]))
1187 /* This is a local label. */
1188 ++input_line_pointer;
1189 lab = (long) get_absolute_expression ();
1190 if (dollar_label_defined (lab))
1192 name = dollar_label_name (lab, 0);
1193 sym = symbol_find (name);
1197 name = dollar_label_name (lab, 1);
1198 sym = symbol_find_or_make (name);
1201 expressionP->X_op = O_symbol;
1202 expressionP->X_add_symbol = sym;
1203 expressionP->X_add_number = 0;
1205 else if (input_line_pointer[0] == '$')
1209 int fieldnum, fieldlimit;
1210 LITTLENUM_TYPE floatbuf[8];
1212 /* $float(), $doubleN(), or $extendN() convert floating values
1215 s = input_line_pointer;
1220 if (strncmp (s, "double", sizeof "double" - 1) == 0)
1222 s += sizeof "double" - 1;
1226 else if (strncmp (s, "float", sizeof "float" - 1) == 0)
1228 s += sizeof "float" - 1;
1232 else if (strncmp (s, "extend", sizeof "extend" - 1) == 0)
1234 s += sizeof "extend" - 1;
1245 fieldnum = *s - '0';
1248 if (fieldnum >= fieldlimit)
1257 s = atof_ieee (s, type, floatbuf);
1268 input_line_pointer = s;
1269 expressionP->X_op = O_constant;
1270 expressionP->X_unsigned = 1;
1271 expressionP->X_add_number = ((floatbuf[fieldnum * 2]
1272 << LITTLENUM_NUMBER_OF_BITS)
1273 + floatbuf[fieldnum * 2 + 1]);
1277 /* Round up a section size to the appropriate boundary. */
1279 md_section_align (segment, size)
1283 return size; /* Byte alignment is fine */
1286 /* Exactly what point is a PC-relative offset relative TO?
1287 On the 29000, they're relative to the address of the instruction,
1288 which we have set up as the address of the fixup too. */
1290 md_pcrel_from (fixP)
1293 return fixP->fx_where + fixP->fx_frag->fr_address;