1 /* tc-a29k.c -- Assemble for the AMD 29000.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* John Gilmore has reorganized this module somewhat, to make it easier
21 to convert it to new machines' assemblers as desired. There was too
22 much bloody rewriting required before. There still probably is. */
27 #include "opcode/a29k.h"
29 /* Make it easier to clone this machine desc into another one. */
30 #define machine_opcode a29k_opcode
31 #define machine_opcodes a29k_opcodes
32 #define machine_ip a29k_ip
33 #define machine_it a29k_it
35 const relax_typeS md_relax_table
[] =
40 #define IMMEDIATE_BIT 0x01000000 /* Turns RB into Immediate */
41 #define ABSOLUTE_BIT 0x01000000 /* Turns PC-relative to Absolute */
42 #define CE_BIT 0x00800000 /* Coprocessor enable in LOAD */
43 #define UI_BIT 0x00000080 /* Unsigned integer in CONVERT */
45 /* handle of the OPCODE hash table */
46 static struct hash_control
*op_hash
= NULL
;
55 int reloc_offset
; /* Offset of reloc within insn */
64 static void machine_ip
PARAMS ((char *str
));
65 /* static void print_insn PARAMS ((struct machine_it *insn)); */
67 static void s_data1
PARAMS ((void));
68 static void s_use
PARAMS ((int));
74 {"align", s_align_bytes
, 4},
75 {"block", s_space
, 0},
76 {"cputype", s_ignore
, 0}, /* CPU as 29000 or 29050 */
77 {"reg", s_lsym
, 0}, /* Register equate, same as equ */
78 {"space", s_ignore
, 0}, /* Listing control */
79 {"sect", s_ignore
, 0}, /* Creation of coff sections */
81 /* We can do this right with coff */
88 int md_short_jump_size
= 4;
89 int md_long_jump_size
= 4;
90 #if defined(BFD_HEADERS)
92 const int md_reloc_size
= RELSZ
; /* Coff headers */
94 const int md_reloc_size
= 12; /* something else headers */
97 const int md_reloc_size
= 12; /* Not bfdized*/
100 /* This array holds the chars that always start a comment. If the
101 pre-processor is disabled, these aren't very useful */
102 const char comment_chars
[] = ";";
104 /* This array holds the chars that only start a comment at the beginning of
105 a line. If the line seems to have the form '# 123 filename'
106 .line and .file directives will appear in the pre-processed output */
107 /* Note that input_file.c hand checks for '#' at the beginning of the
108 first line of the input file. This is because the compiler outputs
109 #NO_APP at the beginning of its output. */
110 /* Also note that comments like this one will always work */
111 const char line_comment_chars
[] = "#";
113 /* We needed an unused char for line separation to work around the
114 lack of macros, using sed and such. */
115 const char line_separator_chars
[] = "@";
117 /* Chars that can be used to separate mant from exp in floating point nums */
118 const char EXP_CHARS
[] = "eE";
120 /* Chars that mean this number is a floating point constant */
123 const char FLT_CHARS
[] = "rRsSfFdDxXpP";
125 /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
126 changed in read.c . Ideally it shouldn't have to know about it at all,
127 but nothing is ideal around here.
130 static unsigned char octal
[256];
131 #define isoctal(c) octal[c]
132 static unsigned char toHex
[256];
135 * anull bit - causes the branch delay slot instructions to not be executed
137 #define ANNUL (1 << 29)
146 if (strncmp (input_line_pointer
, ".text", 5) == 0)
148 input_line_pointer
+= 5;
152 if (strncmp (input_line_pointer
, ".data", 5) == 0)
154 input_line_pointer
+= 5;
158 if (strncmp (input_line_pointer
, ".data1", 6) == 0)
160 input_line_pointer
+= 6;
164 /* Literals can't go in the text segment because you can't read
165 from instruction memory on some 29k's. So, into initialized data. */
166 if (strncmp (input_line_pointer
, ".lit", 4) == 0)
168 input_line_pointer
+= 4;
169 subseg_set (SEG_DATA
, 200);
170 demand_empty_rest_of_line ();
174 as_bad ("Unknown segment type");
175 demand_empty_rest_of_line ();
182 subseg_set (SEG_DATA
, 1);
183 demand_empty_rest_of_line ();
187 #endif /* OBJ_COFF */
189 /* Install symbol definition that maps REGNAME to REGNO.
190 FIXME-SOON: These are not recognized in mixed case. */
193 insert_sreg (regname
, regnum
)
197 /* FIXME-SOON, put something in these syms so they won't be output to the symbol
198 table of the resulting object file. */
200 /* Must be large enough to hold the names of the special registers. */
204 symbol_table_insert (symbol_new (regname
, SEG_REGISTER
, regnum
, &zero_address_frag
));
205 for (i
= 0; regname
[i
]; i
++)
206 buf
[i
] = islower (regname
[i
]) ? toupper (regname
[i
]) : regname
[i
];
209 symbol_table_insert (symbol_new (buf
, SEG_REGISTER
, regnum
, &zero_address_frag
));
210 } /* insert_sreg() */
212 /* Install symbol definitions for assorted special registers.
213 See ASM29K Ref page 2-9. */
220 /* Protected special-purpose register names */
221 insert_sreg ("vab", SREG
+ 0);
222 insert_sreg ("ops", SREG
+ 1);
223 insert_sreg ("cps", SREG
+ 2);
224 insert_sreg ("cfg", SREG
+ 3);
225 insert_sreg ("cha", SREG
+ 4);
226 insert_sreg ("chd", SREG
+ 5);
227 insert_sreg ("chc", SREG
+ 6);
228 insert_sreg ("rbp", SREG
+ 7);
229 insert_sreg ("tmc", SREG
+ 8);
230 insert_sreg ("tmr", SREG
+ 9);
231 insert_sreg ("pc0", SREG
+ 10);
232 insert_sreg ("pc1", SREG
+ 11);
233 insert_sreg ("pc2", SREG
+ 12);
234 insert_sreg ("mmu", SREG
+ 13);
235 insert_sreg ("lru", SREG
+ 14);
237 /* Additional protected special-purpose registers for the 29050 */
238 insert_sreg ("rsn", SREG
+ 15);
239 insert_sreg ("rma0", SREG
+ 16);
240 insert_sreg ("rmc0", SREG
+ 17);
241 insert_sreg ("rma1", SREG
+ 18);
242 insert_sreg ("rmc1", SREG
+ 19);
243 insert_sreg ("spc0", SREG
+ 20);
244 insert_sreg ("spc1", SREG
+ 21);
245 insert_sreg ("spc2", SREG
+ 22);
246 insert_sreg ("iba0", SREG
+ 23);
247 insert_sreg ("ibc0", SREG
+ 24);
248 insert_sreg ("iba1", SREG
+ 25);
249 insert_sreg ("ibc1", SREG
+ 26);
251 /* Unprotected special-purpose register names */
252 insert_sreg ("ipc", SREG
+ 128);
253 insert_sreg ("ipa", SREG
+ 129);
254 insert_sreg ("ipb", SREG
+ 130);
255 insert_sreg ("q", SREG
+ 131);
256 insert_sreg ("alu", SREG
+ 132);
257 insert_sreg ("bp", SREG
+ 133);
258 insert_sreg ("fc", SREG
+ 134);
259 insert_sreg ("cr", SREG
+ 135);
260 insert_sreg ("fpe", SREG
+ 160);
261 insert_sreg ("inte", SREG
+ 161);
262 insert_sreg ("fps", SREG
+ 162);
263 /* "", SREG+163); Reserved */
264 insert_sreg ("exop", SREG
+ 164);
265 } /* define_some_regs() */
267 /* This function is called once, at assembler startup time. It should
268 set up all the tables, etc. that the MD part of the assembler will need. */
272 register const char *retval
= NULL
;
274 register int skipnext
= 0;
275 register unsigned int i
;
276 register char *strend
, *strend2
;
278 /* Hash up all the opcodes for fast use later. */
280 op_hash
= hash_new ();
282 for (i
= 0; i
< num_opcodes
; i
++)
284 const char *name
= machine_opcodes
[i
].name
;
292 /* Hack to avoid multiple opcode entries. We pre-locate all the
293 variations (b/i field and P/A field) and handle them. */
295 if (!strcmp (name
, machine_opcodes
[i
+ 1].name
))
297 if ((machine_opcodes
[i
].opcode
^ machine_opcodes
[i
+ 1].opcode
)
300 strend
= machine_opcodes
[i
].args
+ strlen (machine_opcodes
[i
].args
) - 1;
301 strend2
= machine_opcodes
[i
+ 1].args
+ strlen (machine_opcodes
[i
+ 1].args
) - 1;
322 fprintf (stderr
, "internal error: can't handle opcode %s\n", name
);
326 /* OK, this is an i/b or A/P pair. We skip the higher-valued one,
327 and let the code for operand checking handle OR-ing in the bit. */
328 if (machine_opcodes
[i
].opcode
& 1)
334 retval
= hash_insert (op_hash
, name
, (PTR
) &machine_opcodes
[i
]);
335 if (retval
!= NULL
&& *retval
!= '\0')
337 fprintf (stderr
, "internal error: can't hash `%s': %s\n",
338 machine_opcodes
[i
].name
, retval
);
344 as_fatal ("Broken assembler. No assembly attempted.");
346 for (i
= '0'; i
< '8'; ++i
)
348 for (i
= '0'; i
<= '9'; ++i
)
350 for (i
= 'a'; i
<= 'f'; ++i
)
351 toHex
[i
] = i
+ 10 - 'a';
352 for (i
= 'A'; i
<= 'F'; ++i
)
353 toHex
[i
] = i
+ 10 - 'A';
364 /* Assemble a single instruction. Its label has already been handled
365 by the generic front end. We just parse opcode and operands, and
366 produce the bytes of data and relocation. */
378 /* put out the opcode */
379 md_number_to_chars (toP
, the_insn
.opcode
, 4);
381 /* put out the symbol-dependent stuff */
382 if (the_insn
.reloc
!= NO_RELOC
)
384 fix_new_exp (frag_now
,
385 (toP
- frag_now
->fr_literal
+ the_insn
.reloc_offset
),
394 parse_operand (s
, operandp
)
396 expressionS
*operandp
;
398 char *save
= input_line_pointer
;
401 input_line_pointer
= s
;
402 expression (operandp
);
403 if (operandp
->X_op
== O_absent
)
404 as_bad ("missing operand");
405 new = input_line_pointer
;
406 input_line_pointer
= save
;
410 /* Instruction parsing. Takes a string containing the opcode.
411 Operands are at input_line_pointer. Output is in the_insn.
412 Warnings or errors are generated. */
421 /* !!!! unsigned long i; */
422 struct machine_opcode
*insn
;
424 unsigned long opcode
;
425 /* !!!! unsigned int mask; */
426 expressionS the_operand
;
427 expressionS
*operand
= &the_operand
;
430 /* Must handle `div0' opcode. */
433 for (; isalnum (*s
); ++s
)
442 case ' ': /* FIXME-SOMEDAY more whitespace */
447 as_bad ("Unknown opcode: `%s'", str
);
450 if ((insn
= (struct machine_opcode
*) hash_find (op_hash
, str
)) == NULL
)
452 as_bad ("Unknown opcode `%s'.", str
);
456 opcode
= insn
->opcode
;
457 memset (&the_insn
, '\0', sizeof (the_insn
));
458 the_insn
.reloc
= NO_RELOC
;
461 * Build the opcode, checking as we go to make
462 * sure that the operands match.
464 * If an operand matches, we modify the_insn or opcode appropriately,
465 * and do a "continue". If an operand fails to match, we "break".
467 if (insn
->args
[0] != '\0')
468 s
= parse_operand (s
, operand
); /* Prime the pump */
470 for (args
= insn
->args
;; ++args
)
475 case '\0': /* end of args */
478 /* We are truly done. */
479 the_insn
.opcode
= opcode
;
482 as_bad ("Too many operands: %s", s
);
485 case ',': /* Must match a comma */
488 s
= parse_operand (s
, operand
); /* Parse next opnd */
493 case 'v': /* Trap numbers (immediate field) */
494 if (operand
->X_op
== O_constant
)
496 if (operand
->X_add_number
< 256)
498 opcode
|= (operand
->X_add_number
<< 16);
503 as_bad ("Immediate value of %ld is too large",
504 (long) operand
->X_add_number
);
508 the_insn
.reloc
= RELOC_8
;
509 the_insn
.reloc_offset
= 1; /* BIG-ENDIAN Byte 1 of insn */
510 the_insn
.exp
= *operand
;
513 case 'b': /* A general register or 8-bit immediate */
515 /* We treat the two cases identically since we mashed
516 them together in the opcode table. */
517 if (operand
->X_op
== O_register
)
520 opcode
|= IMMEDIATE_BIT
;
521 if (operand
->X_op
== O_constant
)
523 if (operand
->X_add_number
< 256)
525 opcode
|= operand
->X_add_number
;
530 as_bad ("Immediate value of %ld is too large",
531 (long) operand
->X_add_number
);
535 the_insn
.reloc
= RELOC_8
;
536 the_insn
.reloc_offset
= 3; /* BIG-ENDIAN Byte 3 of insn */
537 the_insn
.exp
= *operand
;
540 case 'a': /* next operand must be a register */
543 /* lrNNN or grNNN or %%expr or a user-def register name */
544 if (operand
->X_op
!= O_register
)
545 break; /* Only registers */
546 know (operand
->X_add_symbol
== 0);
547 know (operand
->X_op_symbol
== 0);
548 reg
= operand
->X_add_number
;
550 break; /* No special registers */
553 * Got the register, now figure out where
554 * it goes in the opcode.
571 as_fatal ("failed sanity check.");
574 case 'x': /* 16 bit constant, zero-extended */
575 case 'X': /* 16 bit constant, one-extended */
576 if (operand
->X_op
== O_constant
)
578 opcode
|= (operand
->X_add_number
& 0xFF) << 0 |
579 ((operand
->X_add_number
& 0xFF00) << 8);
582 the_insn
.reloc
= RELOC_CONST
;
583 the_insn
.exp
= *operand
;
587 if (operand
->X_op
== O_constant
)
589 opcode
|= (operand
->X_add_number
& 0x00FF0000) >> 16 |
590 (((unsigned long) operand
->X_add_number
591 /* avoid sign ext */ & 0xFF000000) >> 8);
594 the_insn
.reloc
= RELOC_CONSTH
;
595 the_insn
.exp
= *operand
;
598 case 'P': /* PC-relative jump address */
599 case 'A': /* Absolute jump address */
600 /* These two are treated together since we folded the
601 opcode table entries together. */
602 if (operand
->X_op
== O_constant
)
604 opcode
|= ABSOLUTE_BIT
|
605 (operand
->X_add_number
& 0x0003FC00) << 6 |
606 ((operand
->X_add_number
& 0x000003FC) >> 2);
609 the_insn
.reloc
= RELOC_JUMPTARG
;
610 the_insn
.exp
= *operand
;
611 the_insn
.pcrel
= 1; /* Assume PC-relative jump */
612 /* FIXME-SOON, Do we figure out whether abs later, after know sym val? */
615 case 'e': /* Coprocessor enable bit for LOAD/STORE insn */
616 if (operand
->X_op
== O_constant
)
618 if (operand
->X_add_number
== 0)
620 if (operand
->X_add_number
== 1)
628 case 'n': /* Control bits for LOAD/STORE instructions */
629 if (operand
->X_op
== O_constant
&&
630 operand
->X_add_number
< 128)
632 opcode
|= (operand
->X_add_number
<< 16);
637 case 's': /* Special register number */
638 if (operand
->X_op
!= O_register
)
639 break; /* Only registers */
640 if (operand
->X_add_number
< SREG
)
641 break; /* Not a special register */
642 opcode
|= (operand
->X_add_number
& 0xFF) << 8;
645 case 'u': /* UI bit of CONVERT */
646 if (operand
->X_op
== O_constant
)
648 if (operand
->X_add_number
== 0)
650 if (operand
->X_add_number
== 1)
658 case 'r': /* RND bits of CONVERT */
659 if (operand
->X_op
== O_constant
&&
660 operand
->X_add_number
< 8)
662 opcode
|= operand
->X_add_number
<< 4;
667 case 'd': /* FD bits of CONVERT */
668 if (operand
->X_op
== O_constant
&&
669 operand
->X_add_number
< 4)
671 opcode
|= operand
->X_add_number
<< 2;
677 case 'f': /* FS bits of CONVERT */
678 if (operand
->X_op
== O_constant
&&
679 operand
->X_add_number
< 4)
681 opcode
|= operand
->X_add_number
<< 0;
687 if (operand
->X_op
== O_constant
&&
688 operand
->X_add_number
< 4)
690 opcode
|= operand
->X_add_number
<< 16;
696 if (operand
->X_op
== O_constant
&&
697 operand
->X_add_number
< 16)
699 opcode
|= operand
->X_add_number
<< 18;
707 /* Types or values of args don't match. */
708 as_bad ("Invalid operands");
714 This is identical to the md_atof in m68k.c. I think this is right,
717 Turn a string in input_line_pointer into a floating point constant of type
718 type, and store the appropriate bytes in *litP. The number of LITTLENUMS
719 emitted is stored in *sizeP . An error message is returned, or NULL on OK.
722 /* Equal to MAX_PRECISION in atof-ieee.c */
723 #define MAX_LITTLENUMS 6
726 md_atof (type
, litP
, sizeP
)
732 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
733 LITTLENUM_TYPE
*wordP
;
765 return "Bad call to MD_ATOF()";
767 t
= atof_ieee (input_line_pointer
, type
, words
);
769 input_line_pointer
= t
;
770 *sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
771 for (wordP
= words
; prec
--;)
773 md_number_to_chars (litP
, (long) (*wordP
++), sizeof (LITTLENUM_TYPE
));
774 litP
+= sizeof (LITTLENUM_TYPE
);
776 return ""; /* Someone should teach Dean about null pointers */
780 * Write out big-endian.
783 md_number_to_chars (buf
, val
, n
)
802 as_fatal ("failed sanity check.");
808 md_apply_fix (fixP
, val
)
812 char *buf
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
814 fixP
->fx_addnumber
= val
; /* Remember value for emit_reloc */
817 know (fixP
->fx_size
== 4);
818 know (fixP
->fx_r_type
< NO_RELOC
);
821 * This is a hack. There should be a better way to
824 if (fixP
->fx_r_type
== RELOC_WDISP30
&& fixP
->fx_addsy
)
826 val
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
829 switch (fixP
->fx_r_type
)
844 val
= (val
>>= 2) + 1;
845 buf
[0] |= (val
>> 24) & 0x3f;
846 buf
[1] = (val
>> 16);
852 buf
[1] |= (val
>> 26) & 0x3f;
858 buf
[2] |= (val
>> 8) & 0x03;
863 buf
[2] |= (val
>> 8) & 0x1f;
868 val
= (val
>>= 2) + 1;
871 buf
[1] |= (val
>> 16) & 0x3f;
885 case RELOC_JUMPTARG
: /* 00XX00XX pattern in a word */
886 buf
[1] = val
>> 10; /* Holds bits 0003FFFC of address */
890 case RELOC_CONST
: /* 00XX00XX pattern in a word */
891 buf
[1] = val
>> 8; /* Holds bits 0000XXXX */
895 case RELOC_CONSTH
: /* 00XX00XX pattern in a word */
896 buf
[1] = val
>> 24; /* Holds bits XXXX0000 */
902 as_bad ("bad relocation type: 0x%02x", fixP
->fx_r_type
);
910 tc_coff_fix2rtype (fixP
)
914 switch (fixP
->fx_r_type
)
927 printf ("need %o3\n", fixP
->fx_r_type
);
929 } /* switch on type */
932 } /* tc_coff_fix2rtype() */
934 #endif /* OBJ_COFF */
936 /* should never be called for sparc */
938 md_create_short_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
940 addressT from_addr
, to_addr
;
944 as_fatal ("a29k_create_short_jmp\n");
947 /* should never be called for 29k */
949 md_convert_frag (headers
, fragP
)
950 object_headers
*headers
;
951 register fragS
*fragP
;
953 as_fatal ("sparc_convert_frag\n");
956 /* should never be called for 29k */
958 md_create_long_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
965 as_fatal ("sparc_create_long_jump\n");
968 /* should never be called for a29k */
970 md_estimate_size_before_relax (fragP
, segtype
)
971 register fragS
*fragP
;
974 as_fatal ("sparc_estimate_size_before_relax\n");
979 /* for debugging only */
982 struct machine_it
*insn
;
1015 fprintf (stderr
, "ERROR: %s\n");
1017 fprintf (stderr
, "opcode=0x%08x\n", insn
->opcode
);
1018 fprintf (stderr
, "reloc = %s\n", Reloc
[insn
->reloc
]);
1019 fprintf (stderr
, "exp = {\n");
1020 fprintf (stderr
, "\t\tX_add_symbol = %s\n",
1021 insn
->exp
.X_add_symbol
?
1022 (S_GET_NAME (insn
->exp
.X_add_symbol
) ?
1023 S_GET_NAME (insn
->exp
.X_add_symbol
) : "???") : "0");
1024 fprintf (stderr
, "\t\tX_op_symbol = %s\n",
1025 insn
->exp
.X_op_symbol
?
1026 (S_GET_NAME (insn
->exp
.X_op_symbol
) ?
1027 S_GET_NAME (insn
->exp
.X_op_symbol
) : "???") : "0");
1028 fprintf (stderr
, "\t\tX_add_number = %d\n",
1029 insn
->exp
.X_add_number
);
1030 fprintf (stderr
, "}\n");
1036 /* Translate internal representation of relocation info to target format.
1038 On sparc/29k: first 4 bytes are normal unsigned long address, next three
1039 bytes are index, most sig. byte first. Byte 7 is broken up with
1040 bit 7 as external, bits 6 & 5 unused, and the lower
1041 five bits as relocation type. Next 4 bytes are long addend. */
1042 /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */
1047 tc_aout_fix_to_chars (where
, fixP
, segment_address_in_file
)
1050 relax_addressT segment_address_in_file
;
1054 know (fixP
->fx_r_type
< NO_RELOC
);
1055 know (fixP
->fx_addsy
!= NULL
);
1057 md_number_to_chars (where
,
1058 fixP
->fx_frag
->fr_address
+ fixP
->fx_where
- segment_address_in_file
,
1061 r_symbolnum
= (S_IS_DEFINED (fixP
->fx_addsy
)
1062 ? S_GET_TYPE (fixP
->fx_addsy
)
1063 : fixP
->fx_addsy
->sy_number
);
1065 where
[4] = (r_symbolnum
>> 16) & 0x0ff;
1066 where
[5] = (r_symbolnum
>> 8) & 0x0ff;
1067 where
[6] = r_symbolnum
& 0x0ff;
1068 where
[7] = (((!S_IS_DEFINED (fixP
->fx_addsy
)) << 7) & 0x80) | (0 & 0x60) | (fixP
->fx_r_type
& 0x1F);
1070 md_number_to_chars (&where
[8], fixP
->fx_addnumber
, 4);
1073 } /* tc_aout_fix_to_chars() */
1075 #endif /* OBJ_AOUT */
1078 md_parse_option (argP
, cntP
, vecP
)
1087 /* Default the values of symbols known that should be "predefined". We
1088 don't bother to predefine them unless you actually use one, since there
1089 are a lot of them. */
1092 md_undefined_symbol (name
)
1096 char testbuf
[5 + /*SLOP*/ 5];
1098 if (name
[0] == 'g' || name
[0] == 'G' || name
[0] == 'l' || name
[0] == 'L')
1100 /* Perhaps a global or local register name */
1101 if (name
[1] == 'r' || name
[1] == 'R')
1103 /* Parse the number, make sure it has no extra zeroes or trailing
1105 regnum
= atol (&name
[2]);
1108 sprintf (testbuf
, "%ld", regnum
);
1109 if (strcmp (testbuf
, &name
[2]) != 0)
1110 return 0; /* gr007 or lr7foo or whatever */
1112 /* We have a wiener! Define and return a new symbol for it. */
1113 if (name
[0] == 'l' || name
[0] == 'L')
1115 return (symbol_new (name
, SEG_REGISTER
, regnum
, &zero_address_frag
));
1122 /* Parse an operand that is machine-specific. */
1125 md_operand (expressionP
)
1126 expressionS
*expressionP
;
1129 if (input_line_pointer
[0] == '%' && input_line_pointer
[1] == '%')
1131 /* We have a numeric register expression. No biggy. */
1132 input_line_pointer
+= 2; /* Skip %% */
1133 (void) expression (expressionP
);
1134 if (expressionP
->X_op
!= O_constant
1135 || expressionP
->X_add_number
> 255)
1136 as_bad ("Invalid expression after %%%%\n");
1137 expressionP
->X_op
= O_register
;
1139 else if (input_line_pointer
[0] == '&')
1141 /* We are taking the 'address' of a register...this one is not
1142 in the manual, but it *is* in traps/fpsymbol.h! What they
1143 seem to want is the register number, as an absolute number. */
1144 input_line_pointer
++; /* Skip & */
1145 (void) expression (expressionP
);
1146 if (expressionP
->X_op
!= O_register
)
1147 as_bad ("Invalid register in & expression");
1149 expressionP
->X_op
= O_constant
;
1153 /* Round up a section size to the appropriate boundary. */
1155 md_section_align (segment
, size
)
1159 return size
; /* Byte alignment is fine */
1162 /* Exactly what point is a PC-relative offset relative TO?
1163 On the 29000, they're relative to the address of the instruction,
1164 which we have set up as the address of the fixup too. */
1166 md_pcrel_from (fixP
)
1169 return fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
1178 /* end of tc-a29k.c */