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 */
61 static void machine_ip
PARAMS ((char *str
));
62 /* static void print_insn PARAMS ((struct machine_it *insn)); */
64 static void s_data1
PARAMS ((void));
65 static void s_use
PARAMS ((int));
71 {"align", s_align_bytes
, 4},
72 {"block", s_space
, 0},
73 {"cputype", s_ignore
, 0}, /* CPU as 29000 or 29050 */
74 {"reg", s_lsym
, 0}, /* Register equate, same as equ */
75 {"space", s_ignore
, 0}, /* Listing control */
76 {"sect", s_ignore
, 0}, /* Creation of coff sections */
78 /* We can do this right with coff. */
85 int md_short_jump_size
= 4;
86 int md_long_jump_size
= 4;
87 #if defined(BFD_HEADERS)
89 const int md_reloc_size
= RELSZ
; /* Coff headers */
91 const int md_reloc_size
= 12; /* something else headers */
94 const int md_reloc_size
= 12; /* Not bfdized*/
97 /* This array holds the chars that always start a comment. If the
98 pre-processor is disabled, these aren't very useful */
99 const char comment_chars
[] = ";";
101 /* This array holds the chars that only start a comment at the beginning of
102 a line. If the line seems to have the form '# 123 filename'
103 .line and .file directives will appear in the pre-processed output */
104 /* Note that input_file.c hand checks for '#' at the beginning of the
105 first line of the input file. This is because the compiler outputs
106 #NO_APP at the beginning of its output. */
107 /* Also note that comments like this one will always work */
108 const char line_comment_chars
[] = "#";
110 /* We needed an unused char for line separation to work around the
111 lack of macros, using sed and such. */
112 const char line_separator_chars
[] = "@";
114 /* Chars that can be used to separate mant from exp in floating point nums */
115 const char EXP_CHARS
[] = "eE";
117 /* Chars that mean this number is a floating point constant */
120 const char FLT_CHARS
[] = "rRsSfFdDxXpP";
122 /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
123 changed in read.c. Ideally it shouldn't have to know about it at
124 all, but nothing is ideal around here. */
126 static unsigned char octal
[256];
127 #define isoctal(c) octal[c]
128 static unsigned char toHex
[256];
131 * anull bit - causes the branch delay slot instructions to not be executed
133 #define ANNUL (1 << 29)
141 if (strncmp (input_line_pointer
, ".text", 5) == 0)
143 input_line_pointer
+= 5;
147 if (strncmp (input_line_pointer
, ".data", 5) == 0)
149 input_line_pointer
+= 5;
153 if (strncmp (input_line_pointer
, ".data1", 6) == 0)
155 input_line_pointer
+= 6;
159 /* Literals can't go in the text segment because you can't read from
160 instruction memory on some 29k's. So, into initialized data. */
161 if (strncmp (input_line_pointer
, ".lit", 4) == 0)
163 input_line_pointer
+= 4;
164 subseg_set (SEG_DATA
, 200);
165 demand_empty_rest_of_line ();
169 as_bad ("Unknown segment type");
170 demand_empty_rest_of_line ();
177 subseg_set (SEG_DATA
, 1);
178 demand_empty_rest_of_line ();
182 #endif /* OBJ_COFF */
184 /* Install symbol definition that maps REGNAME to REGNO.
185 FIXME-SOON: These are not recognized in mixed case. */
188 insert_sreg (regname
, regnum
)
192 /* FIXME-SOON, put something in these syms so they won't be output
193 to the symbol table of the resulting object file. */
195 /* Must be large enough to hold the names of the special registers. */
199 symbol_table_insert (symbol_new (regname
, SEG_REGISTER
, (valueT
) regnum
,
200 &zero_address_frag
));
201 for (i
= 0; regname
[i
]; i
++)
202 buf
[i
] = islower (regname
[i
]) ? toupper (regname
[i
]) : regname
[i
];
205 symbol_table_insert (symbol_new (buf
, SEG_REGISTER
, (valueT
) regnum
,
206 &zero_address_frag
));
209 /* Install symbol definitions for assorted special registers.
210 See ASM29K Ref page 2-9. */
217 /* Protected special-purpose register names */
218 insert_sreg ("vab", SREG
+ 0);
219 insert_sreg ("ops", SREG
+ 1);
220 insert_sreg ("cps", SREG
+ 2);
221 insert_sreg ("cfg", SREG
+ 3);
222 insert_sreg ("cha", SREG
+ 4);
223 insert_sreg ("chd", SREG
+ 5);
224 insert_sreg ("chc", SREG
+ 6);
225 insert_sreg ("rbp", SREG
+ 7);
226 insert_sreg ("tmc", SREG
+ 8);
227 insert_sreg ("tmr", SREG
+ 9);
228 insert_sreg ("pc0", SREG
+ 10);
229 insert_sreg ("pc1", SREG
+ 11);
230 insert_sreg ("pc2", SREG
+ 12);
231 insert_sreg ("mmu", SREG
+ 13);
232 insert_sreg ("lru", SREG
+ 14);
234 /* Additional protected special-purpose registers for the 29050 */
235 insert_sreg ("rsn", SREG
+ 15);
236 insert_sreg ("rma0", SREG
+ 16);
237 insert_sreg ("rmc0", SREG
+ 17);
238 insert_sreg ("rma1", SREG
+ 18);
239 insert_sreg ("rmc1", SREG
+ 19);
240 insert_sreg ("spc0", SREG
+ 20);
241 insert_sreg ("spc1", SREG
+ 21);
242 insert_sreg ("spc2", SREG
+ 22);
243 insert_sreg ("iba0", SREG
+ 23);
244 insert_sreg ("ibc0", SREG
+ 24);
245 insert_sreg ("iba1", SREG
+ 25);
246 insert_sreg ("ibc1", SREG
+ 26);
248 /* Unprotected special-purpose register names */
249 insert_sreg ("ipc", SREG
+ 128);
250 insert_sreg ("ipa", SREG
+ 129);
251 insert_sreg ("ipb", SREG
+ 130);
252 insert_sreg ("q", SREG
+ 131);
253 insert_sreg ("alu", SREG
+ 132);
254 insert_sreg ("bp", SREG
+ 133);
255 insert_sreg ("fc", SREG
+ 134);
256 insert_sreg ("cr", SREG
+ 135);
257 insert_sreg ("fpe", SREG
+ 160);
258 insert_sreg ("inte", SREG
+ 161);
259 insert_sreg ("fps", SREG
+ 162);
260 /* "", SREG+163); Reserved */
261 insert_sreg ("exop", SREG
+ 164);
264 /* This function is called once, at assembler startup time. It should
265 set up all the tables, etc., that the MD part of the assembler will
270 register const char *retval
= NULL
;
272 register int skipnext
= 0;
273 register unsigned int i
;
274 register char *strend
, *strend2
;
276 /* Hash up all the opcodes for fast use later. */
278 op_hash
= hash_new ();
280 for (i
= 0; i
< num_opcodes
; i
++)
282 const char *name
= machine_opcodes
[i
].name
;
290 /* Hack to avoid multiple opcode entries. We pre-locate all the
291 variations (b/i field and P/A field) and handle them. */
293 if (!strcmp (name
, machine_opcodes
[i
+ 1].name
))
295 if ((machine_opcodes
[i
].opcode
& 0x01000000) != 0
296 || (machine_opcodes
[i
+ 1].opcode
& 0x01000000) == 0
297 || ((machine_opcodes
[i
].opcode
| 0x01000000)
298 != 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;
314 fprintf (stderr
, "internal error: can't handle opcode %s\n",
319 /* OK, this is an i/b or A/P pair. We skip the
320 higher-valued one, and let the code for operand checking
321 handle OR-ing in the bit. */
325 retval
= hash_insert (op_hash
, name
, (PTR
) &machine_opcodes
[i
]);
328 fprintf (stderr
, "internal error: can't hash `%s': %s\n",
329 machine_opcodes
[i
].name
, retval
);
335 as_fatal ("Broken assembler. No assembly attempted.");
337 for (i
= '0'; i
< '8'; ++i
)
339 for (i
= '0'; i
<= '9'; ++i
)
341 for (i
= 'a'; i
<= 'f'; ++i
)
342 toHex
[i
] = i
+ 10 - 'a';
343 for (i
= 'A'; i
<= 'F'; ++i
)
344 toHex
[i
] = i
+ 10 - 'A';
355 /* Assemble a single instruction. Its label has already been handled
356 by the generic front end. We just parse opcode and operands, and
357 produce the bytes of data and relocation. */
368 /* put out the opcode */
369 md_number_to_chars (toP
, the_insn
.opcode
, 4);
371 /* put out the symbol-dependent stuff */
372 if (the_insn
.reloc
!= NO_RELOC
)
374 fix_new_exp (frag_now
,
375 (toP
- frag_now
->fr_literal
+ the_insn
.reloc_offset
),
384 parse_operand (s
, operandp
)
386 expressionS
*operandp
;
388 char *save
= input_line_pointer
;
391 input_line_pointer
= s
;
392 expression (operandp
);
393 if (operandp
->X_op
== O_absent
)
394 as_bad ("missing operand");
395 new = input_line_pointer
;
396 input_line_pointer
= save
;
400 /* Instruction parsing. Takes a string containing the opcode.
401 Operands are at input_line_pointer. Output is in the_insn.
402 Warnings or errors are generated. */
410 struct machine_opcode
*insn
;
412 unsigned long opcode
;
413 expressionS the_operand
;
414 expressionS
*operand
= &the_operand
;
417 /* Must handle `div0' opcode. */
420 for (; isalnum (*s
); ++s
)
429 case ' ': /* FIXME-SOMEDAY more whitespace */
434 as_bad ("Unknown opcode: `%s'", str
);
437 if ((insn
= (struct machine_opcode
*) hash_find (op_hash
, str
)) == NULL
)
439 as_bad ("Unknown opcode `%s'.", str
);
443 opcode
= insn
->opcode
;
444 memset (&the_insn
, '\0', sizeof (the_insn
));
445 the_insn
.reloc
= NO_RELOC
;
447 /* Build the opcode, checking as we go to make sure that the
450 If an operand matches, we modify the_insn or opcode appropriately,
451 and do a "continue". If an operand fails to match, we "break". */
453 if (insn
->args
[0] != '\0')
454 s
= parse_operand (s
, operand
); /* Prime the pump */
456 for (args
= insn
->args
;; ++args
)
461 case '\0': /* end of args */
464 /* We are truly done. */
465 the_insn
.opcode
= opcode
;
468 as_bad ("Too many operands: %s", s
);
471 case ',': /* Must match a comma */
474 s
= parse_operand (s
, operand
); /* Parse next opnd */
479 case 'v': /* Trap numbers (immediate field) */
480 if (operand
->X_op
== O_constant
)
482 if (operand
->X_add_number
< 256)
484 opcode
|= (operand
->X_add_number
<< 16);
489 as_bad ("Immediate value of %ld is too large",
490 (long) operand
->X_add_number
);
494 the_insn
.reloc
= RELOC_8
;
495 the_insn
.reloc_offset
= 1; /* BIG-ENDIAN Byte 1 of insn */
496 the_insn
.exp
= *operand
;
499 case 'b': /* A general register or 8-bit immediate */
501 /* We treat the two cases identically since we mashed
502 them together in the opcode table. */
503 if (operand
->X_op
== O_register
)
506 /* Make sure the 'i' case really exists. */
507 if ((insn
->opcode
| IMMEDIATE_BIT
) != (insn
+ 1)->opcode
)
510 opcode
|= IMMEDIATE_BIT
;
511 if (operand
->X_op
== O_constant
)
513 if (operand
->X_add_number
< 256)
515 opcode
|= operand
->X_add_number
;
520 as_bad ("Immediate value of %ld is too large",
521 (long) operand
->X_add_number
);
525 the_insn
.reloc
= RELOC_8
;
526 the_insn
.reloc_offset
= 3; /* BIG-ENDIAN Byte 3 of insn */
527 the_insn
.exp
= *operand
;
530 case 'a': /* next operand must be a register */
533 /* lrNNN or grNNN or %%expr or a user-def register name */
534 if (operand
->X_op
!= O_register
)
535 break; /* Only registers */
536 know (operand
->X_add_symbol
== 0);
537 know (operand
->X_op_symbol
== 0);
538 reg
= operand
->X_add_number
;
540 break; /* No special registers */
542 /* Got the register, now figure out where it goes in the
559 as_fatal ("failed sanity check.");
562 case 'x': /* 16 bit constant, zero-extended */
563 case 'X': /* 16 bit constant, one-extended */
564 if (operand
->X_op
== O_constant
)
566 opcode
|= (operand
->X_add_number
& 0xFF) << 0 |
567 ((operand
->X_add_number
& 0xFF00) << 8);
570 the_insn
.reloc
= RELOC_CONST
;
571 the_insn
.exp
= *operand
;
575 if (operand
->X_op
== O_constant
)
577 opcode
|= (operand
->X_add_number
& 0x00FF0000) >> 16 |
578 (((unsigned long) operand
->X_add_number
579 /* avoid sign ext */ & 0xFF000000) >> 8);
582 the_insn
.reloc
= RELOC_CONSTH
;
583 the_insn
.exp
= *operand
;
586 case 'P': /* PC-relative jump address */
587 case 'A': /* Absolute jump address */
588 /* These two are treated together since we folded the
589 opcode table entries together. */
590 if (operand
->X_op
== O_constant
)
592 /* Make sure the 'A' case really exists. */
593 if ((insn
->opcode
| ABSOLUTE_BIT
) != (insn
+ 1)->opcode
)
595 opcode
|= ABSOLUTE_BIT
|
596 (operand
->X_add_number
& 0x0003FC00) << 6 |
597 ((operand
->X_add_number
& 0x000003FC) >> 2);
600 the_insn
.reloc
= RELOC_JUMPTARG
;
601 the_insn
.exp
= *operand
;
602 the_insn
.pcrel
= 1; /* Assume PC-relative jump */
603 /* FIXME-SOON, Do we figure out whether abs later, after
607 case 'e': /* Coprocessor enable bit for LOAD/STORE insn */
608 if (operand
->X_op
== O_constant
)
610 if (operand
->X_add_number
== 0)
612 if (operand
->X_add_number
== 1)
620 case 'n': /* Control bits for LOAD/STORE instructions */
621 if (operand
->X_op
== O_constant
&&
622 operand
->X_add_number
< 128)
624 opcode
|= (operand
->X_add_number
<< 16);
629 case 's': /* Special register number */
630 if (operand
->X_op
!= O_register
)
631 break; /* Only registers */
632 if (operand
->X_add_number
< SREG
)
633 break; /* Not a special register */
634 opcode
|= (operand
->X_add_number
& 0xFF) << 8;
637 case 'u': /* UI bit of CONVERT */
638 if (operand
->X_op
== O_constant
)
640 if (operand
->X_add_number
== 0)
642 if (operand
->X_add_number
== 1)
650 case 'r': /* RND bits of CONVERT */
651 if (operand
->X_op
== O_constant
&&
652 operand
->X_add_number
< 8)
654 opcode
|= operand
->X_add_number
<< 4;
659 case 'd': /* FD bits of CONVERT */
660 if (operand
->X_op
== O_constant
&&
661 operand
->X_add_number
< 4)
663 opcode
|= operand
->X_add_number
<< 2;
669 case 'f': /* FS bits of CONVERT */
670 if (operand
->X_op
== O_constant
&&
671 operand
->X_add_number
< 4)
673 opcode
|= operand
->X_add_number
<< 0;
679 if (operand
->X_op
== O_constant
&&
680 operand
->X_add_number
< 4)
682 opcode
|= operand
->X_add_number
<< 16;
688 if (operand
->X_op
== O_constant
&&
689 operand
->X_add_number
< 16)
691 opcode
|= operand
->X_add_number
<< 18;
699 /* Types or values of args don't match. */
700 as_bad ("Invalid operands");
705 /* This is identical to the md_atof in m68k.c. I think this is right,
708 Turn a string in input_line_pointer into a floating point constant
709 of type type, and store the appropriate bytes in *litP. The number
710 of LITTLENUMS emitted is stored in *sizeP . An error message is
711 returned, or NULL on OK. */
713 /* Equal to MAX_PRECISION in atof-ieee.c */
714 #define MAX_LITTLENUMS 6
717 md_atof (type
, litP
, sizeP
)
723 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
724 LITTLENUM_TYPE
*wordP
;
756 return "Bad call to MD_ATOF()";
758 t
= atof_ieee (input_line_pointer
, type
, words
);
760 input_line_pointer
= t
;
761 *sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
762 for (wordP
= words
; prec
--;)
764 md_number_to_chars (litP
, (valueT
) (*wordP
++), sizeof (LITTLENUM_TYPE
));
765 litP
+= sizeof (LITTLENUM_TYPE
);
771 * Write out big-endian.
774 md_number_to_chars (buf
, val
, n
)
779 number_to_chars_bigendian (buf
, val
, n
);
783 md_apply_fix (fixP
, val
)
787 char *buf
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
789 fixP
->fx_addnumber
= val
; /* Remember value for emit_reloc */
792 know (fixP
->fx_size
== 4);
793 know (fixP
->fx_r_type
< NO_RELOC
);
795 /* This is a hack. There should be a better way to handle this. */
796 if (fixP
->fx_r_type
== RELOC_WDISP30
&& fixP
->fx_addsy
)
798 val
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
801 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;
857 case RELOC_JUMPTARG
: /* 00XX00XX pattern in a word */
858 buf
[1] = val
>> 10; /* Holds bits 0003FFFC of address */
862 case RELOC_CONST
: /* 00XX00XX pattern in a word */
863 buf
[1] = val
>> 8; /* Holds bits 0000XXXX */
867 case RELOC_CONSTH
: /* 00XX00XX pattern in a word */
868 buf
[1] = val
>> 24; /* Holds bits XXXX0000 */
874 as_bad ("bad relocation type: 0x%02x", fixP
->fx_r_type
);
882 tc_coff_fix2rtype (fixP
)
886 switch (fixP
->fx_r_type
)
899 printf ("need %o3\n", fixP
->fx_r_type
);
901 } /* switch on type */
906 #endif /* OBJ_COFF */
908 /* should never be called for 29k */
910 md_create_short_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
912 addressT from_addr
, to_addr
;
916 as_fatal ("a29k_create_short_jmp\n");
919 /* should never be called for 29k */
921 md_convert_frag (headers
, fragP
)
922 object_headers
*headers
;
923 register fragS
*fragP
;
925 as_fatal ("a29k_convert_frag\n");
928 /* should never be called for 29k */
930 md_create_long_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
937 as_fatal ("a29k_create_long_jump\n");
940 /* should never be called for a29k */
942 md_estimate_size_before_relax (fragP
, segtype
)
943 register fragS
*fragP
;
946 as_fatal ("a29k_estimate_size_before_relax\n");
951 /* for debugging only */
954 struct machine_it
*insn
;
987 fprintf (stderr
, "ERROR: %s\n");
989 fprintf (stderr
, "opcode=0x%08x\n", insn
->opcode
);
990 fprintf (stderr
, "reloc = %s\n", Reloc
[insn
->reloc
]);
991 fprintf (stderr
, "exp = {\n");
992 fprintf (stderr
, "\t\tX_add_symbol = %s\n",
993 insn
->exp
.X_add_symbol
?
994 (S_GET_NAME (insn
->exp
.X_add_symbol
) ?
995 S_GET_NAME (insn
->exp
.X_add_symbol
) : "???") : "0");
996 fprintf (stderr
, "\t\tX_op_symbol = %s\n",
997 insn
->exp
.X_op_symbol
?
998 (S_GET_NAME (insn
->exp
.X_op_symbol
) ?
999 S_GET_NAME (insn
->exp
.X_op_symbol
) : "???") : "0");
1000 fprintf (stderr
, "\t\tX_add_number = %d\n",
1001 insn
->exp
.X_add_number
);
1002 fprintf (stderr
, "}\n");
1008 /* Translate internal representation of relocation info to target format.
1010 On sparc/29k: first 4 bytes are normal unsigned long address, next three
1011 bytes are index, most sig. byte first. Byte 7 is broken up with
1012 bit 7 as external, bits 6 & 5 unused, and the lower
1013 five bits as relocation type. Next 4 bytes are long addend. */
1014 /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */
1019 tc_aout_fix_to_chars (where
, fixP
, segment_address_in_file
)
1022 relax_addressT segment_address_in_file
;
1026 know (fixP
->fx_r_type
< NO_RELOC
);
1027 know (fixP
->fx_addsy
!= NULL
);
1029 md_number_to_chars (where
,
1030 fixP
->fx_frag
->fr_address
+ fixP
->fx_where
- segment_address_in_file
,
1033 r_symbolnum
= (S_IS_DEFINED (fixP
->fx_addsy
)
1034 ? S_GET_TYPE (fixP
->fx_addsy
)
1035 : fixP
->fx_addsy
->sy_number
);
1037 where
[4] = (r_symbolnum
>> 16) & 0x0ff;
1038 where
[5] = (r_symbolnum
>> 8) & 0x0ff;
1039 where
[6] = r_symbolnum
& 0x0ff;
1040 where
[7] = (((!S_IS_DEFINED (fixP
->fx_addsy
)) << 7) & 0x80) | (0 & 0x60) | (fixP
->fx_r_type
& 0x1F);
1042 md_number_to_chars (&where
[8], fixP
->fx_addnumber
, 4);
1045 #endif /* OBJ_AOUT */
1048 md_parse_option (argP
, cntP
, vecP
)
1057 /* Default the values of symbols known that should be "predefined". We
1058 don't bother to predefine them unless you actually use one, since there
1059 are a lot of them. */
1062 md_undefined_symbol (name
)
1066 char testbuf
[5 + /*SLOP*/ 5];
1068 if (name
[0] == 'g' || name
[0] == 'G' || name
[0] == 'l' || name
[0] == 'L')
1070 /* Perhaps a global or local register name */
1071 if (name
[1] == 'r' || name
[1] == 'R')
1073 /* Parse the number, make sure it has no extra zeroes or trailing
1075 regnum
= atol (&name
[2]);
1078 sprintf (testbuf
, "%ld", regnum
);
1079 if (strcmp (testbuf
, &name
[2]) != 0)
1080 return 0; /* gr007 or lr7foo or whatever */
1082 /* We have a wiener! Define and return a new symbol for it. */
1083 if (name
[0] == 'l' || name
[0] == 'L')
1085 return (symbol_new (name
, SEG_REGISTER
, (valueT
) regnum
,
1086 &zero_address_frag
));
1093 /* Parse an operand that is machine-specific. */
1096 md_operand (expressionP
)
1097 expressionS
*expressionP
;
1100 if (input_line_pointer
[0] == '%' && input_line_pointer
[1] == '%')
1102 /* We have a numeric register expression. No biggy. */
1103 input_line_pointer
+= 2; /* Skip %% */
1104 (void) expression (expressionP
);
1105 if (expressionP
->X_op
!= O_constant
1106 || expressionP
->X_add_number
> 255)
1107 as_bad ("Invalid expression after %%%%\n");
1108 expressionP
->X_op
= O_register
;
1110 else if (input_line_pointer
[0] == '&')
1112 /* We are taking the 'address' of a register...this one is not
1113 in the manual, but it *is* in traps/fpsymbol.h! What they
1114 seem to want is the register number, as an absolute number. */
1115 input_line_pointer
++; /* Skip & */
1116 (void) expression (expressionP
);
1117 if (expressionP
->X_op
!= O_register
)
1118 as_bad ("Invalid register in & expression");
1120 expressionP
->X_op
= O_constant
;
1124 /* Round up a section size to the appropriate boundary. */
1126 md_section_align (segment
, size
)
1130 return size
; /* Byte alignment is fine */
1133 /* Exactly what point is a PC-relative offset relative TO?
1134 On the 29000, they're relative to the address of the instruction,
1135 which we have set up as the address of the fixup too. */
1137 md_pcrel_from (fixP
)
1140 return fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
1143 /* end of tc-a29k.c */