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026df7c5 NC |
1 | /* tc-c4x.c -- Assemble for the Texas Instruments TMS320C[34]x. |
2 | Copyright (C) 1997,1998, 2002 Free Software Foundation. | |
3 | ||
4 | Contributed by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz) | |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
247b1fe6 SS |
22 | /* |
23 | TODOs: | |
24 | ------ | |
25 | ||
44287f60 SS |
26 | o .align cannot handle fill-data-width larger than 0xFF/8-bits. It |
27 | should be possible to define a 32-bits pattern. | |
026df7c5 | 28 | |
247b1fe6 SS |
29 | o .align fills all section with NOP's when used regardless if has |
30 | been used in .text or .data. (However the .align is primarely | |
31 | intended used in .text sections. If you require something else, | |
32 | use .align <size>,0x00) | |
026df7c5 | 33 | |
44287f60 SS |
34 | o .align: Implement a 'bu' insn if the number of nop's exeeds 4 |
35 | within the align frag. if(fragsize>4words) insert bu fragend+1 | |
36 | first. | |
026df7c5 | 37 | |
247b1fe6 | 38 | o .usect if has symbol on previous line not implemented |
026df7c5 | 39 | |
247b1fe6 | 40 | o .sym, .eos, .stag, .etag, .member not implemented |
026df7c5 | 41 | |
44287f60 SS |
42 | o Evaluation of constant floating point expressions (expr.c needs |
43 | work!) | |
026df7c5 | 44 | |
9c87d6c7 | 45 | o Support 'abc' constants (that is 0x616263) |
247b1fe6 | 46 | */ |
026df7c5 NC |
47 | |
48 | #include <stdio.h> | |
49 | #include <ctype.h> | |
50 | ||
51 | #include "as.h" | |
52 | #include "opcode/tic4x.h" | |
53 | #include "subsegs.h" | |
54 | #include "obstack.h" | |
55 | #include "symbols.h" | |
56 | #include "listing.h" | |
57 | ||
58 | /* OK, we accept a syntax similar to the other well known C30 | |
59 | assembly tools. With C4X_ALT_SYNTAX defined we are more | |
60 | flexible, allowing a more Unix-like syntax: `%' in front of | |
61 | register names, `#' in front of immediate constants, and | |
62 | not requiring `@' in front of direct addresses. */ | |
63 | ||
64 | #define C4X_ALT_SYNTAX | |
65 | ||
66 | /* Equal to MAX_PRECISION in atof-ieee.c. */ | |
67 | #define MAX_LITTLENUMS 6 /* (12 bytes) */ | |
68 | ||
69 | /* Handle of the inst mnemonic hash table. */ | |
70 | static struct hash_control *c4x_op_hash = NULL; | |
71 | ||
72 | /* Handle asg pseudo. */ | |
73 | static struct hash_control *c4x_asg_hash = NULL; | |
74 | ||
75 | static unsigned int c4x_cpu = 0; /* Default to TMS320C40. */ | |
9c87d6c7 SS |
76 | static unsigned int c4x_revision = 0; /* CPU revision */ |
77 | static unsigned int c4x_idle2 = 0; /* Idle2 support */ | |
78 | static unsigned int c4x_lowpower = 0; /* Lowpower support */ | |
79 | static unsigned int c4x_enhanced = 0; /* Enhanced opcode support */ | |
026df7c5 NC |
80 | static unsigned int c4x_big_model = 0; /* Default to small memory model. */ |
81 | static unsigned int c4x_reg_args = 0; /* Default to args passed on stack. */ | |
9c87d6c7 SS |
82 | static unsigned long c4x_oplevel = 0; /* Opcode level */ |
83 | ||
84 | #define OPTION_CPU 'm' | |
85 | #define OPTION_BIG (OPTION_MD_BASE + 1) | |
86 | #define OPTION_SMALL (OPTION_MD_BASE + 2) | |
87 | #define OPTION_MEMPARM (OPTION_MD_BASE + 3) | |
88 | #define OPTION_REGPARM (OPTION_MD_BASE + 4) | |
89 | #define OPTION_IDLE2 (OPTION_MD_BASE + 5) | |
90 | #define OPTION_LOWPOWER (OPTION_MD_BASE + 6) | |
91 | #define OPTION_ENHANCED (OPTION_MD_BASE + 7) | |
92 | #define OPTION_REV (OPTION_MD_BASE + 8) | |
93 | ||
94 | CONST char *md_shortopts = "bm:prs"; | |
95 | struct option md_longopts[] = | |
96 | { | |
97 | { "mcpu", required_argument, NULL, OPTION_CPU }, | |
98 | { "mdsp", required_argument, NULL, OPTION_CPU }, | |
99 | { "mbig", no_argument, NULL, OPTION_BIG }, | |
100 | { "msmall", no_argument, NULL, OPTION_SMALL }, | |
101 | { "mmemparm", no_argument, NULL, OPTION_MEMPARM }, | |
102 | { "mregparm", no_argument, NULL, OPTION_REGPARM }, | |
103 | { "midle2", no_argument, NULL, OPTION_IDLE2 }, | |
104 | { "mlowpower", no_argument, NULL, OPTION_LOWPOWER }, | |
105 | { "menhanced", no_argument, NULL, OPTION_ENHANCED }, | |
106 | { "mrev", required_argument, NULL, OPTION_REV }, | |
107 | { NULL, no_argument, NULL, 0 } | |
108 | }; | |
109 | ||
110 | size_t md_longopts_size = sizeof (md_longopts); | |
111 | ||
026df7c5 NC |
112 | |
113 | typedef enum | |
114 | { | |
115 | M_UNKNOWN, M_IMMED, M_DIRECT, M_REGISTER, M_INDIRECT, | |
116 | M_IMMED_F, M_PARALLEL, M_HI | |
117 | } | |
118 | c4x_addr_mode_t; | |
119 | ||
120 | typedef struct c4x_operand | |
121 | { | |
122 | c4x_addr_mode_t mode; /* Addressing mode. */ | |
123 | expressionS expr; /* Expression. */ | |
124 | int disp; /* Displacement for indirect addressing. */ | |
125 | int aregno; /* Aux. register number. */ | |
126 | LITTLENUM_TYPE fwords[MAX_LITTLENUMS]; /* Float immed. number. */ | |
127 | } | |
128 | c4x_operand_t; | |
129 | ||
130 | typedef struct c4x_insn | |
131 | { | |
132 | char name[C4X_NAME_MAX]; /* Mnemonic of instruction. */ | |
133 | unsigned int in_use; /* True if in_use. */ | |
134 | unsigned int parallel; /* True if parallel instruction. */ | |
135 | unsigned int nchars; /* This is always 4 for the C30. */ | |
136 | unsigned long opcode; /* Opcode number. */ | |
137 | expressionS exp; /* Expression required for relocation. */ | |
138 | int reloc; /* Relocation type required. */ | |
139 | int pcrel; /* True if relocation PC relative. */ | |
140 | char *pname; /* Name of instruction in parallel. */ | |
141 | unsigned int num_operands; /* Number of operands in total. */ | |
142 | c4x_inst_t *inst; /* Pointer to first template. */ | |
143 | c4x_operand_t operands[C4X_OPERANDS_MAX]; | |
144 | } | |
145 | c4x_insn_t; | |
146 | ||
147 | static c4x_insn_t the_insn; /* Info about our instruction. */ | |
148 | static c4x_insn_t *insn = &the_insn; | |
149 | ||
247b1fe6 SS |
150 | static int c4x_gen_to_words |
151 | PARAMS ((FLONUM_TYPE, LITTLENUM_TYPE *, int )); | |
152 | static char *c4x_atof | |
153 | PARAMS ((char *, char, LITTLENUM_TYPE * )); | |
75d12d11 | 154 | static void c4x_insert_reg |
247b1fe6 | 155 | PARAMS ((char *, int )); |
75d12d11 | 156 | static void c4x_insert_sym |
247b1fe6 | 157 | PARAMS ((char *, int )); |
75d12d11 | 158 | static char *c4x_expression |
247b1fe6 | 159 | PARAMS ((char *, expressionS *)); |
75d12d11 | 160 | static char *c4x_expression_abs |
247b1fe6 | 161 | PARAMS ((char *, int *)); |
75d12d11 | 162 | static void c4x_emit_char |
247b1fe6 | 163 | PARAMS ((char, int)); |
75d12d11 | 164 | static void c4x_seg_alloc |
247b1fe6 | 165 | PARAMS ((char *, segT, int, symbolS *)); |
75d12d11 | 166 | static void c4x_asg |
247b1fe6 | 167 | PARAMS ((int)); |
75d12d11 | 168 | static void c4x_bss |
247b1fe6 SS |
169 | PARAMS ((int)); |
170 | static void c4x_globl | |
171 | PARAMS ((int)); | |
75d12d11 | 172 | static void c4x_cons |
247b1fe6 SS |
173 | PARAMS ((int)); |
174 | static void c4x_stringer | |
175 | PARAMS ((int)); | |
75d12d11 | 176 | static void c4x_eval |
247b1fe6 | 177 | PARAMS ((int)); |
75d12d11 | 178 | static void c4x_newblock |
247b1fe6 | 179 | PARAMS ((int)); |
75d12d11 | 180 | static void c4x_sect |
247b1fe6 | 181 | PARAMS ((int)); |
75d12d11 | 182 | static void c4x_set |
247b1fe6 | 183 | PARAMS ((int)); |
75d12d11 | 184 | static void c4x_usect |
247b1fe6 | 185 | PARAMS ((int)); |
75d12d11 | 186 | static void c4x_version |
247b1fe6 | 187 | PARAMS ((int)); |
75d12d11 | 188 | static void c4x_init_regtable |
247b1fe6 | 189 | PARAMS ((void)); |
75d12d11 | 190 | static void c4x_init_symbols |
247b1fe6 | 191 | PARAMS ((void)); |
75d12d11 | 192 | static int c4x_inst_insert |
247b1fe6 | 193 | PARAMS ((c4x_inst_t *)); |
75d12d11 | 194 | static c4x_inst_t *c4x_inst_make |
247b1fe6 | 195 | PARAMS ((char *, unsigned long, char *)); |
75d12d11 | 196 | static int c4x_inst_add |
247b1fe6 | 197 | PARAMS ((c4x_inst_t *)); |
75d12d11 | 198 | void md_begin |
247b1fe6 | 199 | PARAMS ((void)); |
75d12d11 | 200 | void c4x_end |
247b1fe6 | 201 | PARAMS ((void)); |
75d12d11 | 202 | static int c4x_indirect_parse |
247b1fe6 SS |
203 | PARAMS ((c4x_operand_t *, const c4x_indirect_t *)); |
204 | static char *c4x_operand_parse | |
205 | PARAMS ((char *, c4x_operand_t *)); | |
75d12d11 | 206 | static int c4x_operands_match |
9c87d6c7 SS |
207 | PARAMS ((c4x_inst_t *, c4x_insn_t *, int)); |
208 | static void c4x_insn_check | |
209 | PARAMS ((c4x_insn_t *)); | |
247b1fe6 SS |
210 | static void c4x_insn_output |
211 | PARAMS ((c4x_insn_t *)); | |
212 | static int c4x_operands_parse | |
213 | PARAMS ((char *, c4x_operand_t *, int )); | |
75d12d11 | 214 | void md_assemble |
247b1fe6 | 215 | PARAMS ((char *)); |
75d12d11 | 216 | void c4x_cleanup |
247b1fe6 | 217 | PARAMS ((void)); |
75d12d11 | 218 | char *md_atof |
247b1fe6 | 219 | PARAMS ((int, char *, int *)); |
75d12d11 | 220 | void md_apply_fix3 |
247b1fe6 | 221 | PARAMS ((fixS *, valueT *, segT )); |
75d12d11 | 222 | void md_convert_frag |
247b1fe6 | 223 | PARAMS ((bfd *, segT, fragS *)); |
75d12d11 | 224 | void md_create_short_jump |
247b1fe6 | 225 | PARAMS ((char *, addressT, addressT, fragS *, symbolS *)); |
75d12d11 | 226 | void md_create_long_jump |
247b1fe6 | 227 | PARAMS ((char *, addressT, addressT, fragS *, symbolS *)); |
75d12d11 | 228 | int md_estimate_size_before_relax |
247b1fe6 | 229 | PARAMS ((register fragS *, segT)); |
75d12d11 | 230 | int md_parse_option |
247b1fe6 | 231 | PARAMS ((int, char *)); |
75d12d11 | 232 | void md_show_usage |
247b1fe6 | 233 | PARAMS ((FILE *)); |
75d12d11 | 234 | int c4x_unrecognized_line |
247b1fe6 | 235 | PARAMS ((int)); |
75d12d11 | 236 | symbolS *md_undefined_symbol |
247b1fe6 | 237 | PARAMS ((char *)); |
75d12d11 | 238 | void md_operand |
247b1fe6 | 239 | PARAMS ((expressionS *)); |
75d12d11 | 240 | valueT md_section_align |
247b1fe6 | 241 | PARAMS ((segT, valueT)); |
75d12d11 | 242 | static int c4x_pc_offset |
247b1fe6 | 243 | PARAMS ((unsigned int)); |
75d12d11 | 244 | long md_pcrel_from |
247b1fe6 | 245 | PARAMS ((fixS *)); |
75d12d11 | 246 | int c4x_do_align |
247b1fe6 | 247 | PARAMS ((int, const char *, int, int)); |
75d12d11 | 248 | void c4x_start_line |
247b1fe6 | 249 | PARAMS ((void)); |
75d12d11 | 250 | arelent *tc_gen_reloc |
247b1fe6 | 251 | PARAMS ((asection *, fixS *)); |
75d12d11 | 252 | |
026df7c5 NC |
253 | |
254 | const pseudo_typeS | |
255 | md_pseudo_table[] = | |
256 | { | |
257 | {"align", s_align_bytes, 32}, | |
247b1fe6 SS |
258 | {"ascii", c4x_stringer, 1}, |
259 | {"asciz", c4x_stringer, 0}, | |
026df7c5 | 260 | {"asg", c4x_asg, 0}, |
247b1fe6 | 261 | {"block", s_space, 4}, |
026df7c5 NC |
262 | {"byte", c4x_cons, 1}, |
263 | {"bss", c4x_bss, 0}, | |
247b1fe6 | 264 | {"copy", s_include, 0}, |
026df7c5 | 265 | {"def", c4x_globl, 0}, |
026df7c5 NC |
266 | {"equ", c4x_set, 0}, |
267 | {"eval", c4x_eval, 0}, | |
026df7c5 NC |
268 | {"global", c4x_globl, 0}, |
269 | {"globl", c4x_globl, 0}, | |
270 | {"hword", c4x_cons, 2}, | |
271 | {"ieee", float_cons, 'i'}, | |
247b1fe6 SS |
272 | {"int", c4x_cons, 4}, /* .int allocates 4 bytes. */ |
273 | {"ldouble", float_cons, 'e'}, | |
026df7c5 | 274 | {"newblock", c4x_newblock, 0}, |
247b1fe6 | 275 | {"ref", s_ignore, 0}, /* All undefined treated as external. */ |
026df7c5 | 276 | {"set", c4x_set, 0}, |
247b1fe6 | 277 | {"sect", c4x_sect, 1}, /* Define named section. */ |
026df7c5 | 278 | {"space", s_space, 4}, |
247b1fe6 SS |
279 | {"string", c4x_stringer, 0}, |
280 | {"usect", c4x_usect, 0}, /* Reserve space in uninit. named sect. */ | |
026df7c5 | 281 | {"version", c4x_version, 0}, |
247b1fe6 | 282 | {"word", c4x_cons, 4}, /* .word allocates 4 bytes. */ |
026df7c5 NC |
283 | {"xdef", c4x_globl, 0}, |
284 | {NULL, 0, 0}, | |
285 | }; | |
286 | ||
287 | int md_short_jump_size = 4; | |
288 | int md_long_jump_size = 4; | |
289 | const int md_reloc_size = RELSZ; /* Coff headers. */ | |
290 | ||
291 | /* This array holds the chars that always start a comment. If the | |
292 | pre-processor is disabled, these aren't very useful. */ | |
293 | #ifdef C4X_ALT_SYNTAX | |
294 | const char comment_chars[] = ";!"; | |
295 | #else | |
296 | const char comment_chars[] = ";"; | |
297 | #endif | |
298 | ||
299 | /* This array holds the chars that only start a comment at the beginning of | |
300 | a line. If the line seems to have the form '# 123 filename' | |
301 | .line and .file directives will appear in the pre-processed output. | |
302 | Note that input_file.c hand checks for '#' at the beginning of the | |
303 | first line of the input file. This is because the compiler outputs | |
304 | #NO_APP at the beginning of its output. | |
305 | Also note that comments like this one will always work. */ | |
306 | const char line_comment_chars[] = "#*"; | |
307 | ||
308 | /* We needed an unused char for line separation to work around the | |
309 | lack of macros, using sed and such. */ | |
310 | const char line_separator_chars[] = "&"; | |
311 | ||
312 | /* Chars that can be used to separate mant from exp in floating point nums. */ | |
313 | const char EXP_CHARS[] = "eE"; | |
314 | ||
315 | /* Chars that mean this number is a floating point constant. */ | |
316 | /* As in 0f12.456 */ | |
317 | /* or 0d1.2345e12 */ | |
318 | const char FLT_CHARS[] = "fFilsS"; | |
319 | ||
320 | /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be | |
321 | changed in read.c. Ideally it shouldn't have to know about it at | |
322 | all, but nothing is ideal around here. */ | |
323 | ||
324 | /* Flonums returned here. */ | |
325 | extern FLONUM_TYPE generic_floating_point_number; | |
326 | ||
327 | /* Precision in LittleNums. */ | |
247b1fe6 SS |
328 | #define MAX_PRECISION (4) /* Its a bit overkill for us, but the code |
329 | reqires it... */ | |
026df7c5 NC |
330 | #define S_PRECISION (1) /* Short float constants 16-bit. */ |
331 | #define F_PRECISION (2) /* Float and double types 32-bit. */ | |
247b1fe6 | 332 | #define E_PRECISION (4) /* Extended precision, 64-bit (real 40-bit). */ |
026df7c5 NC |
333 | #define GUARD (2) |
334 | ||
335 | /* Turn generic_floating_point_number into a real short/float/double. */ | |
247b1fe6 | 336 | static int |
75d12d11 AM |
337 | c4x_gen_to_words (flonum, words, precision) |
338 | FLONUM_TYPE flonum; | |
339 | LITTLENUM_TYPE *words; | |
340 | int precision; | |
026df7c5 NC |
341 | { |
342 | int return_value = 0; | |
343 | LITTLENUM_TYPE *p; /* Littlenum pointer. */ | |
344 | int mantissa_bits; /* Bits in mantissa field. */ | |
345 | int exponent_bits; /* Bits in exponent field. */ | |
346 | int exponent; | |
347 | unsigned int sone; /* Scaled one. */ | |
348 | unsigned int sfract; /* Scaled fraction. */ | |
349 | unsigned int smant; /* Scaled mantissa. */ | |
350 | unsigned int tmp; | |
247b1fe6 SS |
351 | unsigned int mover; /* Mantissa overflow bits */ |
352 | unsigned int rbit; /* Round bit. */ | |
026df7c5 NC |
353 | int shift; /* Shift count. */ |
354 | ||
247b1fe6 SS |
355 | /* NOTE: Svein Seldal <Svein.Seldal@solidas.com> |
356 | The code in this function is altered slightly to support floats | |
357 | with 31-bits mantissas, thus the documentation below may be a | |
358 | little bit inaccurate. | |
359 | ||
360 | By Michael P. Hayes <m.hayes@elec.canterbury.ac.nz> | |
361 | Here is how a generic floating point number is stored using | |
026df7c5 NC |
362 | flonums (an extension of bignums) where p is a pointer to an |
363 | array of LITTLENUMs. | |
364 | ||
365 | For example 2e-3 is stored with exp = -4 and | |
366 | bits[0] = 0x0000 | |
367 | bits[1] = 0x0000 | |
368 | bits[2] = 0x4fde | |
369 | bits[3] = 0x978d | |
370 | bits[4] = 0x126e | |
371 | bits[5] = 0x0083 | |
372 | with low = &bits[2], high = &bits[5], and leader = &bits[5]. | |
373 | ||
374 | This number can be written as | |
375 | 0x0083126e978d4fde.00000000 * 65536**-4 or | |
376 | 0x0.0083126e978d4fde * 65536**0 or | |
377 | 0x0.83126e978d4fde * 2**-8 = 2e-3 | |
378 | ||
379 | Note that low points to the 65536**0 littlenum (bits[2]) and | |
380 | leader points to the most significant non-zero littlenum | |
381 | (bits[5]). | |
382 | ||
383 | TMS320C3X floating point numbers are a bit of a strange beast. | |
384 | The 32-bit flavour has the 8 MSBs representing the exponent in | |
385 | twos complement format (-128 to +127). There is then a sign bit | |
386 | followed by 23 bits of mantissa. The mantissa is expressed in | |
387 | twos complement format with the binary point after the most | |
388 | significant non sign bit. The bit after the binary point is | |
389 | suppressed since it is the complement of the sign bit. The | |
390 | effective mantissa is thus 24 bits. Zero is represented by an | |
391 | exponent of -128. | |
392 | ||
393 | The 16-bit flavour has the 4 MSBs representing the exponent in | |
394 | twos complement format (-8 to +7). There is then a sign bit | |
395 | followed by 11 bits of mantissa. The mantissa is expressed in | |
396 | twos complement format with the binary point after the most | |
397 | significant non sign bit. The bit after the binary point is | |
398 | suppressed since it is the complement of the sign bit. The | |
399 | effective mantissa is thus 12 bits. Zero is represented by an | |
400 | exponent of -8. For example, | |
401 | ||
402 | number norm mant m x e s i fraction f | |
403 | +0.500 => 1.00000000000 -1 -1 0 1 .00000000000 (1 + 0) * 2^(-1) | |
404 | +0.999 => 1.11111111111 -1 -1 0 1 .11111111111 (1 + 0.99) * 2^(-1) | |
405 | +1.000 => 1.00000000000 0 0 0 1 .00000000000 (1 + 0) * 2^(0) | |
406 | +1.500 => 1.10000000000 0 0 0 1 .10000000000 (1 + 0.5) * 2^(0) | |
407 | +1.999 => 1.11111111111 0 0 0 1 .11111111111 (1 + 0.9) * 2^(0) | |
408 | +2.000 => 1.00000000000 1 1 0 1 .00000000000 (1 + 0) * 2^(1) | |
409 | +4.000 => 1.00000000000 2 2 0 1 .00000000000 (1 + 0) * 2^(2) | |
410 | -0.500 => 1.00000000000 -1 -1 1 0 .10000000000 (-2 + 0) * 2^(-2) | |
411 | -1.000 => 1.00000000000 0 -1 1 0 .00000000000 (-2 + 0) * 2^(-1) | |
412 | -1.500 => 1.10000000000 0 0 1 0 .10000000000 (-2 + 0.5) * 2^(0) | |
413 | -1.999 => 1.11111111111 0 0 1 0 .00000000001 (-2 + 0.11) * 2^(0) | |
414 | -2.000 => 1.00000000000 1 1 1 0 .00000000000 (-2 + 0) * 2^(0) | |
415 | -4.000 => 1.00000000000 2 1 1 0 .00000000000 (-2 + 0) * 2^(1) | |
416 | ||
417 | where e is the exponent, s is the sign bit, i is the implied bit, | |
418 | and f is the fraction stored in the mantissa field. | |
419 | ||
420 | num = (1 + f) * 2^x = m * 2^e if s = 0 | |
421 | num = (-2 + f) * 2^x = -m * 2^e if s = 1 | |
422 | where 0 <= f < 1.0 and 1.0 <= m < 2.0 | |
423 | ||
424 | The fraction (f) and exponent (e) fields for the TMS320C3X format | |
425 | can be derived from the normalised mantissa (m) and exponent (x) using: | |
426 | ||
427 | f = m - 1, e = x if s = 0 | |
428 | f = 2 - m, e = x if s = 1 and m != 1.0 | |
429 | f = 0, e = x - 1 if s = 1 and m = 1.0 | |
430 | f = 0, e = -8 if m = 0 | |
431 | ||
432 | ||
433 | OK, the other issue we have to consider is rounding since the | |
434 | mantissa has a much higher potential precision than what we can | |
435 | represent. To do this we add half the smallest storable fraction. | |
436 | We then have to renormalise the number to allow for overflow. | |
437 | ||
438 | To convert a generic flonum into a TMS320C3X floating point | |
439 | number, here's what we try to do.... | |
440 | ||
441 | The first thing is to generate a normalised mantissa (m) where | |
442 | 1.0 <= m < 2 and to convert the exponent from base 16 to base 2. | |
443 | We desire the binary point to be placed after the most significant | |
444 | non zero bit. This process is done in two steps: firstly, the | |
445 | littlenum with the most significant non zero bit is located (this | |
446 | is done for us since leader points to this littlenum) and the | |
447 | binary point (which is currently after the LSB of the littlenum | |
448 | pointed to by low) is moved to before the MSB of the littlenum | |
449 | pointed to by leader. This requires the exponent to be adjusted | |
450 | by leader - low + 1. In the earlier example, the new exponent is | |
451 | thus -4 + (5 - 2 + 1) = 0 (base 65536). We now need to convert | |
452 | the exponent to base 2 by multiplying the exponent by 16 (log2 | |
453 | 65536). The exponent base 2 is thus also zero. | |
454 | ||
455 | The second step is to hunt for the most significant non zero bit | |
456 | in the leader littlenum. We do this by left shifting a copy of | |
457 | the leader littlenum until bit 16 is set (0x10000) and counting | |
458 | the number of shifts, S, required. The number of shifts then has to | |
459 | be added to correct the exponent (base 2). For our example, this | |
460 | will require 9 shifts and thus our normalised exponent (base 2) is | |
461 | 0 + 9 = 9. Note that the worst case scenario is when the leader | |
462 | littlenum is 1, thus requiring 16 shifts. | |
463 | ||
464 | We now have to left shift the other littlenums by the same amount, | |
465 | propagating the shifted bits into the more significant littlenums. | |
466 | To save a lot of unecessary shifting we only have to consider | |
467 | two or three littlenums, since the greatest number of mantissa | |
468 | bits required is 24 + 1 rounding bit. While two littlenums | |
469 | provide 32 bits of precision, the most significant littlenum | |
470 | may only contain a single significant bit and thus an extra | |
471 | littlenum is required. | |
472 | ||
473 | Denoting the number of bits in the fraction field as F, we require | |
474 | G = F + 2 bits (one extra bit is for rounding, the other gets | |
475 | suppressed). Say we required S shifts to find the most | |
476 | significant bit in the leader littlenum, the number of left shifts | |
477 | required to move this bit into bit position G - 1 is L = G + S - 17. | |
478 | Note that this shift count may be negative for the short floating | |
479 | point flavour (where F = 11 and thus G = 13 and potentially S < 3). | |
480 | If L > 0 we have to shunt the next littlenum into position. Bit | |
481 | 15 (the MSB) of the next littlenum needs to get moved into position | |
482 | L - 1 (If L > 15 we need all the bits of this littlenum and | |
483 | some more from the next one.). We subtract 16 from L and use this | |
484 | as the left shift count; the resultant value we or with the | |
485 | previous result. If L > 0, we repeat this operation. */ | |
486 | ||
487 | if (precision != S_PRECISION) | |
488 | words[1] = 0x0000; | |
247b1fe6 SS |
489 | if (precision == E_PRECISION) |
490 | words[2] = words[3] = 0x0000; | |
026df7c5 | 491 | |
247b1fe6 SS |
492 | /* 0.0e0 or NaN seen. */ |
493 | if (flonum.low > flonum.leader /* = 0.0e0 */ | |
494 | || flonum.sign == 0) /* = NaN */ | |
026df7c5 | 495 | { |
247b1fe6 SS |
496 | if(flonum.sign == 0) |
497 | as_bad ("Nan, using zero."); | |
026df7c5 NC |
498 | words[0] = 0x8000; |
499 | return return_value; | |
500 | } | |
501 | ||
247b1fe6 | 502 | if (flonum.sign == 'P') |
026df7c5 NC |
503 | { |
504 | /* +INF: Replace with maximum float. */ | |
505 | if (precision == S_PRECISION) | |
506 | words[0] = 0x77ff; | |
247b1fe6 | 507 | else |
026df7c5 NC |
508 | { |
509 | words[0] = 0x7f7f; | |
510 | words[1] = 0xffff; | |
511 | } | |
247b1fe6 SS |
512 | if (precision == E_PRECISION) |
513 | { | |
514 | words[2] = 0x7fff; | |
515 | words[3] = 0xffff; | |
516 | } | |
026df7c5 NC |
517 | return return_value; |
518 | } | |
519 | else if (flonum.sign == 'N') | |
520 | { | |
521 | /* -INF: Replace with maximum float. */ | |
522 | if (precision == S_PRECISION) | |
523 | words[0] = 0x7800; | |
247b1fe6 SS |
524 | else |
525 | words[0] = 0x7f80; | |
526 | if (precision == E_PRECISION) | |
527 | words[2] = 0x8000; | |
026df7c5 NC |
528 | return return_value; |
529 | } | |
530 | ||
531 | exponent = (flonum.exponent + flonum.leader - flonum.low + 1) * 16; | |
532 | ||
533 | if (!(tmp = *flonum.leader)) | |
534 | abort (); /* Hmmm. */ | |
535 | shift = 0; /* Find position of first sig. bit. */ | |
536 | while (tmp >>= 1) | |
537 | shift++; | |
538 | exponent -= (16 - shift); /* Adjust exponent. */ | |
539 | ||
540 | if (precision == S_PRECISION) /* Allow 1 rounding bit. */ | |
541 | { | |
542 | exponent_bits = 4; | |
247b1fe6 | 543 | mantissa_bits = 11; |
026df7c5 | 544 | } |
247b1fe6 SS |
545 | else if(precision == F_PRECISION) |
546 | { | |
547 | exponent_bits = 8; | |
548 | mantissa_bits = 23; | |
549 | } | |
550 | else /* E_PRECISION */ | |
026df7c5 NC |
551 | { |
552 | exponent_bits = 8; | |
247b1fe6 | 553 | mantissa_bits = 31; |
026df7c5 NC |
554 | } |
555 | ||
556 | shift = mantissa_bits - shift; | |
557 | ||
558 | smant = 0; | |
247b1fe6 SS |
559 | mover = 0; |
560 | rbit = 0; | |
561 | /* Store the mantissa data into smant and the roundbit into rbit */ | |
026df7c5 NC |
562 | for (p = flonum.leader; p >= flonum.low && shift > -16; p--) |
563 | { | |
564 | tmp = shift >= 0 ? *p << shift : *p >> -shift; | |
247b1fe6 | 565 | rbit = shift < 0 ? ((*p >> (-shift-1)) & 0x1) : 0; |
026df7c5 NC |
566 | smant |= tmp; |
567 | shift -= 16; | |
568 | } | |
569 | ||
247b1fe6 SS |
570 | /* OK, we've got our scaled mantissa so let's round it up */ |
571 | if(rbit) | |
572 | { | |
573 | /* If the mantissa is going to overflow when added, lets store | |
574 | the extra bit in mover. -- A special case exists when | |
575 | mantissa_bits is 31 (E_PRECISION). Then the first test cannot | |
576 | be trusted, as result is host-dependent, thus the second | |
577 | test. */ | |
578 | if( smant == ((unsigned)(1<<(mantissa_bits+1))-1) | |
579 | || smant == (unsigned)-1 ) /* This is to catch E_PRECISION cases */ | |
580 | mover=1; | |
581 | smant++; | |
582 | } | |
583 | ||
584 | /* Get the scaled one value */ | |
585 | sone = (1 << (mantissa_bits)); | |
026df7c5 NC |
586 | |
587 | /* The number may be unnormalised so renormalise it... */ | |
247b1fe6 | 588 | if(mover) |
026df7c5 NC |
589 | { |
590 | smant >>= 1; | |
247b1fe6 | 591 | smant |= sone; /* Insert the bit from mover into smant */ |
026df7c5 NC |
592 | exponent++; |
593 | } | |
594 | ||
595 | /* The binary point is now between bit positions 11 and 10 or 23 and 22, | |
596 | i.e., between mantissa_bits - 1 and mantissa_bits - 2 and the | |
597 | bit at mantissa_bits - 1 should be set. */ | |
247b1fe6 SS |
598 | if (!(sone&smant)) |
599 | abort (); /* Ooops. */ | |
026df7c5 | 600 | |
026df7c5 NC |
601 | if (flonum.sign == '+') |
602 | sfract = smant - sone; /* smant - 1.0. */ | |
603 | else | |
604 | { | |
605 | /* This seems to work. */ | |
606 | if (smant == sone) | |
607 | { | |
608 | exponent--; | |
609 | sfract = 0; | |
610 | } | |
611 | else | |
247b1fe6 SS |
612 | { |
613 | sfract = -smant & (sone-1); /* 2.0 - smant. */ | |
614 | } | |
026df7c5 NC |
615 | sfract |= sone; /* Insert sign bit. */ |
616 | } | |
617 | ||
618 | if (abs (exponent) >= (1 << (exponent_bits - 1))) | |
619 | as_bad ("Cannot represent exponent in %d bits", exponent_bits); | |
620 | ||
621 | /* Force exponent to fit in desired field width. */ | |
622 | exponent &= (1 << (exponent_bits)) - 1; | |
026df7c5 | 623 | |
247b1fe6 SS |
624 | if (precision == E_PRECISION) |
625 | { | |
626 | /* Map the float part first (100% equal format as F_PRECISION) */ | |
627 | words[0] = exponent << (mantissa_bits+1-24); | |
628 | words[0] |= sfract >> 24; | |
629 | words[1] = sfract >> 8; | |
630 | ||
631 | /* Map the mantissa in the next */ | |
632 | words[2] = sfract >> 16; | |
633 | words[3] = sfract & 0xffff; | |
634 | } | |
026df7c5 NC |
635 | else |
636 | { | |
247b1fe6 SS |
637 | /* Insert the exponent data into the word */ |
638 | sfract |= exponent << (mantissa_bits+1); | |
639 | ||
640 | if (precision == S_PRECISION) | |
641 | words[0] = sfract; | |
642 | else | |
643 | { | |
644 | words[0] = sfract >> 16; | |
645 | words[1] = sfract & 0xffff; | |
646 | } | |
026df7c5 NC |
647 | } |
648 | ||
649 | return return_value; | |
650 | } | |
651 | ||
652 | /* Returns pointer past text consumed. */ | |
247b1fe6 | 653 | static char * |
75d12d11 AM |
654 | c4x_atof (str, what_kind, words) |
655 | char *str; | |
656 | char what_kind; | |
657 | LITTLENUM_TYPE *words; | |
026df7c5 NC |
658 | { |
659 | /* Extra bits for zeroed low-order bits. The 1st MAX_PRECISION are | |
660 | zeroed, the last contain flonum bits. */ | |
661 | static LITTLENUM_TYPE bits[MAX_PRECISION + MAX_PRECISION + GUARD]; | |
662 | char *return_value; | |
663 | /* Number of 16-bit words in the format. */ | |
664 | int precision; | |
665 | FLONUM_TYPE save_gen_flonum; | |
666 | ||
667 | /* We have to save the generic_floating_point_number because it | |
668 | contains storage allocation about the array of LITTLENUMs where | |
669 | the value is actually stored. We will allocate our own array of | |
670 | littlenums below, but have to restore the global one on exit. */ | |
671 | save_gen_flonum = generic_floating_point_number; | |
672 | ||
673 | return_value = str; | |
674 | generic_floating_point_number.low = bits + MAX_PRECISION; | |
675 | generic_floating_point_number.high = NULL; | |
676 | generic_floating_point_number.leader = NULL; | |
677 | generic_floating_point_number.exponent = 0; | |
678 | generic_floating_point_number.sign = '\0'; | |
679 | ||
680 | /* Use more LittleNums than seems necessary: the highest flonum may | |
681 | have 15 leading 0 bits, so could be useless. */ | |
682 | ||
683 | memset (bits, '\0', sizeof (LITTLENUM_TYPE) * MAX_PRECISION); | |
684 | ||
685 | switch (what_kind) | |
686 | { | |
687 | case 's': | |
688 | case 'S': | |
689 | precision = S_PRECISION; | |
690 | break; | |
691 | ||
692 | case 'd': | |
693 | case 'D': | |
694 | case 'f': | |
695 | case 'F': | |
696 | precision = F_PRECISION; | |
697 | break; | |
698 | ||
247b1fe6 SS |
699 | case 'E': |
700 | case 'e': | |
701 | precision = E_PRECISION; | |
702 | break; | |
703 | ||
026df7c5 NC |
704 | default: |
705 | as_bad ("Invalid floating point number"); | |
706 | return (NULL); | |
707 | } | |
708 | ||
709 | generic_floating_point_number.high | |
710 | = generic_floating_point_number.low + precision - 1 + GUARD; | |
711 | ||
712 | if (atof_generic (&return_value, ".", EXP_CHARS, | |
713 | &generic_floating_point_number)) | |
714 | { | |
715 | as_bad ("Invalid floating point number"); | |
716 | return (NULL); | |
717 | } | |
718 | ||
719 | c4x_gen_to_words (generic_floating_point_number, | |
720 | words, precision); | |
721 | ||
722 | /* Restore the generic_floating_point_number's storage alloc (and | |
723 | everything else). */ | |
724 | generic_floating_point_number = save_gen_flonum; | |
725 | ||
726 | return return_value; | |
727 | } | |
728 | ||
729 | static void | |
75d12d11 AM |
730 | c4x_insert_reg (regname, regnum) |
731 | char *regname; | |
732 | int regnum; | |
026df7c5 NC |
733 | { |
734 | char buf[32]; | |
735 | int i; | |
736 | ||
737 | symbol_table_insert (symbol_new (regname, reg_section, (valueT) regnum, | |
738 | &zero_address_frag)); | |
739 | for (i = 0; regname[i]; i++) | |
740 | buf[i] = islower (regname[i]) ? toupper (regname[i]) : regname[i]; | |
741 | buf[i] = '\0'; | |
742 | ||
743 | symbol_table_insert (symbol_new (buf, reg_section, (valueT) regnum, | |
744 | &zero_address_frag)); | |
745 | } | |
746 | ||
747 | static void | |
75d12d11 AM |
748 | c4x_insert_sym (symname, value) |
749 | char *symname; | |
750 | int value; | |
026df7c5 NC |
751 | { |
752 | symbolS *symbolP; | |
753 | ||
754 | symbolP = symbol_new (symname, absolute_section, | |
755 | (valueT) value, &zero_address_frag); | |
756 | SF_SET_LOCAL (symbolP); | |
757 | symbol_table_insert (symbolP); | |
758 | } | |
759 | ||
760 | static char * | |
75d12d11 AM |
761 | c4x_expression (str, exp) |
762 | char *str; | |
763 | expressionS *exp; | |
026df7c5 NC |
764 | { |
765 | char *s; | |
766 | char *t; | |
767 | ||
768 | t = input_line_pointer; /* Save line pointer. */ | |
769 | input_line_pointer = str; | |
770 | expression (exp); | |
771 | s = input_line_pointer; | |
772 | input_line_pointer = t; /* Restore line pointer. */ | |
773 | return s; /* Return pointer to where parsing stopped. */ | |
774 | } | |
775 | ||
776 | static char * | |
75d12d11 AM |
777 | c4x_expression_abs (str, value) |
778 | char *str; | |
779 | int *value; | |
026df7c5 NC |
780 | { |
781 | char *s; | |
782 | char *t; | |
783 | ||
784 | t = input_line_pointer; /* Save line pointer. */ | |
785 | input_line_pointer = str; | |
786 | *value = get_absolute_expression (); | |
787 | s = input_line_pointer; | |
788 | input_line_pointer = t; /* Restore line pointer. */ | |
789 | return s; | |
790 | } | |
791 | ||
792 | static void | |
247b1fe6 | 793 | c4x_emit_char (c,b) |
75d12d11 | 794 | char c; |
247b1fe6 | 795 | int b; |
026df7c5 NC |
796 | { |
797 | expressionS exp; | |
798 | ||
799 | exp.X_op = O_constant; | |
800 | exp.X_add_number = c; | |
247b1fe6 | 801 | emit_expr (&exp, b); |
026df7c5 NC |
802 | } |
803 | ||
804 | static void | |
75d12d11 AM |
805 | c4x_seg_alloc (name, seg, size, symbolP) |
806 | char *name ATTRIBUTE_UNUSED; | |
807 | segT seg ATTRIBUTE_UNUSED; | |
808 | int size; | |
809 | symbolS *symbolP; | |
026df7c5 NC |
810 | { |
811 | /* Note that the size is in words | |
812 | so we multiply it by 4 to get the number of bytes to allocate. */ | |
813 | ||
814 | /* If we have symbol: .usect ".fred", size etc., | |
815 | the symbol needs to point to the first location reserved | |
816 | by the pseudo op. */ | |
817 | ||
818 | if (size) | |
819 | { | |
820 | char *p; | |
821 | ||
822 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, | |
823 | (symbolS *) symbolP, | |
824 | size * OCTETS_PER_BYTE, (char *) 0); | |
825 | *p = 0; | |
826 | } | |
827 | } | |
828 | ||
829 | /* .asg ["]character-string["], symbol */ | |
830 | static void | |
75d12d11 AM |
831 | c4x_asg (x) |
832 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
833 | { |
834 | char c; | |
835 | char *name; | |
836 | char *str; | |
837 | char *tmp; | |
838 | ||
839 | SKIP_WHITESPACE (); | |
840 | str = input_line_pointer; | |
841 | ||
842 | /* Skip string expression. */ | |
843 | while (*input_line_pointer != ',' && *input_line_pointer) | |
844 | input_line_pointer++; | |
845 | if (*input_line_pointer != ',') | |
846 | { | |
847 | as_bad ("Comma expected\n"); | |
848 | return; | |
849 | } | |
850 | *input_line_pointer++ = '\0'; | |
851 | name = input_line_pointer; | |
852 | c = get_symbol_end (); /* Get terminator. */ | |
853 | tmp = xmalloc (strlen (str) + 1); | |
854 | strcpy (tmp, str); | |
855 | str = tmp; | |
856 | tmp = xmalloc (strlen (name) + 1); | |
857 | strcpy (tmp, name); | |
858 | name = tmp; | |
859 | if (hash_find (c4x_asg_hash, name)) | |
860 | hash_replace (c4x_asg_hash, name, (PTR) str); | |
861 | else | |
862 | hash_insert (c4x_asg_hash, name, (PTR) str); | |
863 | *input_line_pointer = c; | |
864 | demand_empty_rest_of_line (); | |
865 | } | |
866 | ||
867 | /* .bss symbol, size */ | |
868 | static void | |
75d12d11 AM |
869 | c4x_bss (x) |
870 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
871 | { |
872 | char c; | |
873 | char *name; | |
874 | char *p; | |
875 | int size; | |
876 | segT current_seg; | |
877 | subsegT current_subseg; | |
878 | symbolS *symbolP; | |
879 | ||
880 | current_seg = now_seg; /* Save current seg. */ | |
881 | current_subseg = now_subseg; /* Save current subseg. */ | |
882 | ||
883 | SKIP_WHITESPACE (); | |
884 | name = input_line_pointer; | |
885 | c = get_symbol_end (); /* Get terminator. */ | |
886 | if (c != ',') | |
887 | { | |
888 | as_bad (".bss size argument missing\n"); | |
889 | return; | |
890 | } | |
891 | ||
892 | input_line_pointer = | |
893 | c4x_expression_abs (++input_line_pointer, &size); | |
894 | if (size < 0) | |
895 | { | |
896 | as_bad (".bss size %d < 0!", size); | |
897 | return; | |
898 | } | |
899 | subseg_set (bss_section, 0); | |
900 | symbolP = symbol_find_or_make (name); | |
901 | ||
902 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
903 | symbol_get_frag (symbolP)->fr_symbol = 0; | |
904 | ||
905 | symbol_set_frag (symbolP, frag_now); | |
906 | ||
907 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, | |
908 | size * OCTETS_PER_BYTE, (char *) 0); | |
909 | *p = 0; /* Fill char. */ | |
910 | ||
911 | S_SET_SEGMENT (symbolP, bss_section); | |
912 | ||
913 | /* The symbol may already have been created with a preceding | |
914 | ".globl" directive -- be careful not to step on storage class | |
915 | in that case. Otherwise, set it to static. */ | |
916 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) | |
917 | S_SET_STORAGE_CLASS (symbolP, C_STAT); | |
918 | ||
919 | subseg_set (current_seg, current_subseg); /* Restore current seg. */ | |
920 | demand_empty_rest_of_line (); | |
921 | } | |
922 | ||
247b1fe6 | 923 | static void |
75d12d11 AM |
924 | c4x_globl (ignore) |
925 | int ignore ATTRIBUTE_UNUSED; | |
026df7c5 NC |
926 | { |
927 | char *name; | |
928 | int c; | |
929 | symbolS *symbolP; | |
930 | ||
931 | do | |
932 | { | |
933 | name = input_line_pointer; | |
934 | c = get_symbol_end (); | |
935 | symbolP = symbol_find_or_make (name); | |
936 | *input_line_pointer = c; | |
937 | SKIP_WHITESPACE (); | |
938 | S_SET_STORAGE_CLASS (symbolP, C_EXT); | |
939 | if (c == ',') | |
940 | { | |
941 | input_line_pointer++; | |
942 | SKIP_WHITESPACE (); | |
943 | if (*input_line_pointer == '\n') | |
944 | c = '\n'; | |
945 | } | |
946 | } | |
947 | while (c == ','); | |
948 | ||
949 | demand_empty_rest_of_line (); | |
950 | } | |
951 | ||
952 | /* Handle .byte, .word. .int, .long */ | |
953 | static void | |
75d12d11 AM |
954 | c4x_cons (bytes) |
955 | int bytes; | |
026df7c5 NC |
956 | { |
957 | register unsigned int c; | |
958 | do | |
959 | { | |
960 | SKIP_WHITESPACE (); | |
961 | if (*input_line_pointer == '"') | |
962 | { | |
963 | input_line_pointer++; | |
964 | while (is_a_char (c = next_char_of_string ())) | |
247b1fe6 | 965 | c4x_emit_char (c, 4); |
026df7c5 NC |
966 | know (input_line_pointer[-1] == '\"'); |
967 | } | |
968 | else | |
969 | { | |
970 | expressionS exp; | |
971 | ||
972 | input_line_pointer = c4x_expression (input_line_pointer, &exp); | |
973 | if (exp.X_op == O_constant) | |
974 | { | |
975 | switch (bytes) | |
976 | { | |
977 | case 1: | |
978 | exp.X_add_number &= 255; | |
979 | break; | |
980 | case 2: | |
981 | exp.X_add_number &= 65535; | |
982 | break; | |
983 | } | |
984 | } | |
985 | /* Perhaps we should disallow .byte and .hword with | |
986 | a non constant expression that will require relocation. */ | |
987 | emit_expr (&exp, 4); | |
988 | } | |
989 | } | |
990 | while (*input_line_pointer++ == ','); | |
991 | ||
992 | input_line_pointer--; /* Put terminator back into stream. */ | |
993 | demand_empty_rest_of_line (); | |
994 | } | |
995 | ||
247b1fe6 SS |
996 | /* Handle .ascii, .asciz, .string */ |
997 | static void | |
998 | c4x_stringer (append_zero) | |
999 | int append_zero; /*ex: bytes */ | |
1000 | { | |
1001 | int bytes; | |
1002 | register unsigned int c; | |
1003 | ||
1004 | bytes = 0; | |
1005 | do | |
1006 | { | |
1007 | SKIP_WHITESPACE (); | |
1008 | if (*input_line_pointer == '"') | |
1009 | { | |
1010 | input_line_pointer++; | |
1011 | while (is_a_char (c = next_char_of_string ())) | |
1012 | { | |
1013 | c4x_emit_char (c, 1); | |
1014 | bytes++; | |
1015 | } | |
1016 | ||
1017 | if (append_zero) | |
1018 | { | |
1019 | c4x_emit_char (c, 1); | |
1020 | bytes++; | |
1021 | } | |
1022 | ||
1023 | know (input_line_pointer[-1] == '\"'); | |
1024 | } | |
1025 | else | |
1026 | { | |
1027 | expressionS exp; | |
1028 | ||
1029 | input_line_pointer = c4x_expression (input_line_pointer, &exp); | |
1030 | if (exp.X_op != O_constant) | |
1031 | { | |
1032 | as_bad("Non-constant symbols not allowed\n"); | |
1033 | return; | |
1034 | } | |
1035 | exp.X_add_number &= 255; /* Limit numeber to 8-bit */ | |
1036 | emit_expr (&exp, 1); | |
1037 | bytes++; | |
1038 | } | |
1039 | } | |
1040 | while (*input_line_pointer++ == ','); | |
1041 | ||
1042 | /* Fill out the rest of the expression with 0's to fill up a full word */ | |
1043 | if ( bytes&0x3 ) | |
1044 | c4x_emit_char (0, 4-(bytes&0x3)); | |
1045 | ||
1046 | input_line_pointer--; /* Put terminator back into stream. */ | |
1047 | demand_empty_rest_of_line (); | |
1048 | } | |
1049 | ||
026df7c5 NC |
1050 | /* .eval expression, symbol */ |
1051 | static void | |
75d12d11 AM |
1052 | c4x_eval (x) |
1053 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
1054 | { |
1055 | char c; | |
1056 | int value; | |
1057 | char *name; | |
1058 | ||
1059 | SKIP_WHITESPACE (); | |
1060 | input_line_pointer = | |
1061 | c4x_expression_abs (input_line_pointer, &value); | |
1062 | if (*input_line_pointer++ != ',') | |
1063 | { | |
1064 | as_bad ("Symbol missing\n"); | |
1065 | return; | |
1066 | } | |
1067 | name = input_line_pointer; | |
1068 | c = get_symbol_end (); /* Get terminator. */ | |
1069 | demand_empty_rest_of_line (); | |
1070 | c4x_insert_sym (name, value); | |
1071 | } | |
1072 | ||
1073 | /* Reset local labels. */ | |
1074 | static void | |
75d12d11 AM |
1075 | c4x_newblock (x) |
1076 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
1077 | { |
1078 | dollar_label_clear (); | |
1079 | } | |
1080 | ||
1081 | /* .sect "section-name" [, value] */ | |
1082 | /* .sect ["]section-name[:subsection-name]["] [, value] */ | |
1083 | static void | |
75d12d11 AM |
1084 | c4x_sect (x) |
1085 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
1086 | { |
1087 | char c; | |
1088 | char *section_name; | |
1089 | char *subsection_name; | |
1090 | char *name; | |
1091 | segT seg; | |
1092 | int num; | |
1093 | ||
1094 | SKIP_WHITESPACE (); | |
1095 | if (*input_line_pointer == '"') | |
1096 | input_line_pointer++; | |
1097 | section_name = input_line_pointer; | |
1098 | c = get_symbol_end (); /* Get terminator. */ | |
1099 | input_line_pointer++; /* Skip null symbol terminator. */ | |
1100 | name = xmalloc (input_line_pointer - section_name + 1); | |
1101 | strcpy (name, section_name); | |
1102 | ||
1103 | /* TI C from version 5.0 allows a section name to contain a | |
1104 | subsection name as well. The subsection name is separated by a | |
1105 | ':' from the section name. Currently we scan the subsection | |
1106 | name and discard it. | |
1107 | Volker Kuhlmann <v.kuhlmann@elec.canterbury.ac.nz>. */ | |
1108 | if (c == ':') | |
1109 | { | |
1110 | subsection_name = input_line_pointer; | |
1111 | c = get_symbol_end (); /* Get terminator. */ | |
1112 | input_line_pointer++; /* Skip null symbol terminator. */ | |
1113 | as_warn (".sect: subsection name ignored"); | |
1114 | } | |
1115 | ||
1116 | /* We might still have a '"' to discard, but the character after a | |
1117 | symbol name will be overwritten with a \0 by get_symbol_end() | |
1118 | [VK]. */ | |
1119 | ||
1120 | if (c == ',') | |
1121 | input_line_pointer = | |
1122 | c4x_expression_abs (input_line_pointer, &num); | |
1123 | else if (*input_line_pointer == ',') | |
1124 | { | |
1125 | input_line_pointer = | |
1126 | c4x_expression_abs (++input_line_pointer, &num); | |
1127 | } | |
1128 | else | |
1129 | num = 0; | |
1130 | ||
1131 | seg = subseg_new (name, num); | |
1132 | if (line_label != NULL) | |
1133 | { | |
1134 | S_SET_SEGMENT (line_label, seg); | |
1135 | symbol_set_frag (line_label, frag_now); | |
1136 | } | |
1137 | ||
1138 | if (bfd_get_section_flags (stdoutput, seg) == SEC_NO_FLAGS) | |
1139 | { | |
1140 | if (!bfd_set_section_flags (stdoutput, seg, SEC_DATA)) | |
1141 | as_warn ("Error setting flags for \"%s\": %s", name, | |
1142 | bfd_errmsg (bfd_get_error ())); | |
1143 | } | |
1144 | ||
1145 | /* If the last character overwritten by get_symbol_end() was an | |
1146 | end-of-line, we must restore it or the end of the line will not be | |
1147 | recognised and scanning extends into the next line, stopping with | |
1148 | an error (blame Volker Kuhlmann <v.kuhlmann@elec.canterbury.ac.nz> | |
1149 | if this is not true). */ | |
1150 | if (is_end_of_line[(unsigned char) c]) | |
1151 | *(--input_line_pointer) = c; | |
1152 | ||
1153 | demand_empty_rest_of_line (); | |
1154 | } | |
1155 | ||
1156 | /* symbol[:] .set value or .set symbol, value */ | |
1157 | static void | |
75d12d11 AM |
1158 | c4x_set (x) |
1159 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
1160 | { |
1161 | symbolS *symbolP; | |
1162 | ||
1163 | SKIP_WHITESPACE (); | |
1164 | if ((symbolP = line_label) == NULL) | |
1165 | { | |
1166 | char c; | |
1167 | char *name; | |
1168 | ||
1169 | name = input_line_pointer; | |
1170 | c = get_symbol_end (); /* Get terminator. */ | |
1171 | if (c != ',') | |
1172 | { | |
1173 | as_bad (".set syntax invalid\n"); | |
1174 | ignore_rest_of_line (); | |
1175 | return; | |
1176 | } | |
1177 | symbolP = symbol_find_or_make (name); | |
1178 | } | |
1179 | else | |
1180 | symbol_table_insert (symbolP); | |
1181 | ||
1182 | pseudo_set (symbolP); | |
1183 | demand_empty_rest_of_line (); | |
1184 | } | |
1185 | ||
1186 | /* [symbol] .usect ["]section-name["], size-in-words [, alignment-flag] */ | |
1187 | static void | |
75d12d11 AM |
1188 | c4x_usect (x) |
1189 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
1190 | { |
1191 | char c; | |
1192 | char *name; | |
1193 | char *section_name; | |
1194 | segT seg; | |
1195 | int size, alignment_flag; | |
1196 | segT current_seg; | |
1197 | subsegT current_subseg; | |
1198 | ||
1199 | current_seg = now_seg; /* save current seg. */ | |
1200 | current_subseg = now_subseg; /* save current subseg. */ | |
1201 | ||
1202 | SKIP_WHITESPACE (); | |
1203 | if (*input_line_pointer == '"') | |
1204 | input_line_pointer++; | |
1205 | section_name = input_line_pointer; | |
1206 | c = get_symbol_end (); /* Get terminator. */ | |
1207 | input_line_pointer++; /* Skip null symbol terminator. */ | |
1208 | name = xmalloc (input_line_pointer - section_name + 1); | |
1209 | strcpy (name, section_name); | |
1210 | ||
1211 | if (c == ',') | |
1212 | input_line_pointer = | |
1213 | c4x_expression_abs (input_line_pointer, &size); | |
1214 | else if (*input_line_pointer == ',') | |
1215 | { | |
1216 | input_line_pointer = | |
1217 | c4x_expression_abs (++input_line_pointer, &size); | |
1218 | } | |
1219 | else | |
1220 | size = 0; | |
1221 | ||
1222 | /* Read a possibly present third argument (alignment flag) [VK]. */ | |
1223 | if (*input_line_pointer == ',') | |
1224 | { | |
1225 | input_line_pointer = | |
1226 | c4x_expression_abs (++input_line_pointer, &alignment_flag); | |
1227 | } | |
1228 | else | |
1229 | alignment_flag = 0; | |
1230 | if (alignment_flag) | |
1231 | as_warn (".usect: non-zero alignment flag ignored"); | |
1232 | ||
1233 | seg = subseg_new (name, 0); | |
1234 | if (line_label != NULL) | |
1235 | { | |
1236 | S_SET_SEGMENT (line_label, seg); | |
1237 | symbol_set_frag (line_label, frag_now); | |
1238 | S_SET_VALUE (line_label, frag_now_fix ()); | |
1239 | } | |
1240 | seg_info (seg)->bss = 1; /* Uninitialised data. */ | |
1241 | if (!bfd_set_section_flags (stdoutput, seg, SEC_ALLOC)) | |
1242 | as_warn ("Error setting flags for \"%s\": %s", name, | |
1243 | bfd_errmsg (bfd_get_error ())); | |
1244 | c4x_seg_alloc (name, seg, size, line_label); | |
1245 | ||
1246 | if (S_GET_STORAGE_CLASS (line_label) != C_EXT) | |
1247 | S_SET_STORAGE_CLASS (line_label, C_STAT); | |
1248 | ||
1249 | subseg_set (current_seg, current_subseg); /* Restore current seg. */ | |
1250 | demand_empty_rest_of_line (); | |
1251 | } | |
1252 | ||
1253 | /* .version cpu-version. */ | |
1254 | static void | |
75d12d11 AM |
1255 | c4x_version (x) |
1256 | int x ATTRIBUTE_UNUSED; | |
026df7c5 NC |
1257 | { |
1258 | unsigned int temp; | |
1259 | ||
1260 | input_line_pointer = | |
1261 | c4x_expression_abs (input_line_pointer, &temp); | |
1262 | if (!IS_CPU_C3X (temp) && !IS_CPU_C4X (temp)) | |
9c87d6c7 | 1263 | as_bad ("This assembler does not support processor generation %d", |
026df7c5 NC |
1264 | temp); |
1265 | ||
1266 | if (c4x_cpu && temp != c4x_cpu) | |
9c87d6c7 | 1267 | as_warn ("Changing processor generation on fly not supported..."); |
026df7c5 NC |
1268 | c4x_cpu = temp; |
1269 | demand_empty_rest_of_line (); | |
1270 | } | |
1271 | ||
026df7c5 | 1272 | static void |
75d12d11 | 1273 | c4x_init_regtable () |
026df7c5 NC |
1274 | { |
1275 | unsigned int i; | |
1276 | ||
1277 | for (i = 0; i < c3x_num_registers; i++) | |
1278 | c4x_insert_reg (c3x_registers[i].name, | |
1279 | c3x_registers[i].regno); | |
1280 | ||
1281 | if (IS_CPU_C4X (c4x_cpu)) | |
1282 | { | |
1283 | /* Add additional C4x registers, overriding some C3x ones. */ | |
1284 | for (i = 0; i < c4x_num_registers; i++) | |
1285 | c4x_insert_reg (c4x_registers[i].name, | |
1286 | c4x_registers[i].regno); | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | static void | |
75d12d11 | 1291 | c4x_init_symbols () |
026df7c5 NC |
1292 | { |
1293 | /* The TI tools accept case insensitive versions of these symbols, | |
1294 | we don't ! | |
1295 | ||
1296 | For TI C/Asm 5.0 | |
1297 | ||
1298 | .TMS320xx 30,31,32,40,or 44 set according to -v flag | |
1299 | .C3X or .C3x 1 or 0 1 if -v30,-v31,or -v32 | |
1300 | .C30 1 or 0 1 if -v30 | |
1301 | .C31 1 or 0 1 if -v31 | |
1302 | .C32 1 or 0 1 if -v32 | |
1303 | .C4X or .C4x 1 or 0 1 if -v40, or -v44 | |
1304 | .C40 1 or 0 1 if -v40 | |
1305 | .C44 1 or 0 1 if -v44 | |
1306 | ||
1307 | .REGPARM 1 or 0 1 if -mr option used | |
1308 | .BIGMODEL 1 or 0 1 if -mb option used | |
1309 | ||
1310 | These symbols are currently supported but will be removed in a | |
1311 | later version: | |
1312 | .TMS320C30 1 or 0 1 if -v30,-v31,or -v32 | |
1313 | .TMS320C31 1 or 0 1 if -v31 | |
1314 | .TMS320C32 1 or 0 1 if -v32 | |
1315 | .TMS320C40 1 or 0 1 if -v40, or -v44 | |
1316 | .TMS320C44 1 or 0 1 if -v44 | |
1317 | ||
1318 | Source: TI: TMS320C3x/C4x Assembly Language Tools User's Guide, | |
1319 | 1997, SPRU035C, p. 3-17/3-18. */ | |
1320 | c4x_insert_sym (".REGPARM", c4x_reg_args); | |
1321 | c4x_insert_sym (".MEMPARM", !c4x_reg_args); | |
1322 | c4x_insert_sym (".BIGMODEL", c4x_big_model); | |
1323 | c4x_insert_sym (".C30INTERRUPT", 0); | |
1324 | c4x_insert_sym (".TMS320xx", c4x_cpu == 0 ? 40 : c4x_cpu); | |
247b1fe6 SS |
1325 | c4x_insert_sym (".C3X", c4x_cpu == 30 || c4x_cpu == 31 || c4x_cpu == 32 || c4x_cpu == 33); |
1326 | c4x_insert_sym (".C3x", c4x_cpu == 30 || c4x_cpu == 31 || c4x_cpu == 32 || c4x_cpu == 33); | |
026df7c5 NC |
1327 | c4x_insert_sym (".C4X", c4x_cpu == 0 || c4x_cpu == 40 || c4x_cpu == 44); |
1328 | c4x_insert_sym (".C4x", c4x_cpu == 0 || c4x_cpu == 40 || c4x_cpu == 44); | |
1329 | /* Do we need to have the following symbols also in lower case? */ | |
247b1fe6 SS |
1330 | c4x_insert_sym (".TMS320C30", c4x_cpu == 30 || c4x_cpu == 31 || c4x_cpu == 32 || c4x_cpu == 33); |
1331 | c4x_insert_sym (".tms320C30", c4x_cpu == 30 || c4x_cpu == 31 || c4x_cpu == 32 || c4x_cpu == 33); | |
026df7c5 NC |
1332 | c4x_insert_sym (".TMS320C31", c4x_cpu == 31); |
1333 | c4x_insert_sym (".tms320C31", c4x_cpu == 31); | |
1334 | c4x_insert_sym (".TMS320C32", c4x_cpu == 32); | |
1335 | c4x_insert_sym (".tms320C32", c4x_cpu == 32); | |
247b1fe6 SS |
1336 | c4x_insert_sym (".TMS320C33", c4x_cpu == 33); |
1337 | c4x_insert_sym (".tms320C33", c4x_cpu == 33); | |
026df7c5 NC |
1338 | c4x_insert_sym (".TMS320C40", c4x_cpu == 40 || c4x_cpu == 44 || c4x_cpu == 0); |
1339 | c4x_insert_sym (".tms320C40", c4x_cpu == 40 || c4x_cpu == 44 || c4x_cpu == 0); | |
1340 | c4x_insert_sym (".TMS320C44", c4x_cpu == 44); | |
1341 | c4x_insert_sym (".tms320C44", c4x_cpu == 44); | |
1342 | c4x_insert_sym (".TMX320C40", 0); /* C40 first pass silicon ? */ | |
1343 | c4x_insert_sym (".tmx320C40", 0); | |
1344 | } | |
1345 | ||
1346 | /* Insert a new instruction template into hash table. */ | |
1347 | static int | |
75d12d11 AM |
1348 | c4x_inst_insert (inst) |
1349 | c4x_inst_t *inst; | |
026df7c5 NC |
1350 | { |
1351 | static char prev_name[16]; | |
1352 | const char *retval = NULL; | |
1353 | ||
1354 | /* Only insert the first name if have several similar entries. */ | |
1355 | if (!strcmp (inst->name, prev_name) || inst->name[0] == '\0') | |
1356 | return 1; | |
1357 | ||
1358 | retval = hash_insert (c4x_op_hash, inst->name, (PTR) inst); | |
1359 | if (retval != NULL) | |
1360 | fprintf (stderr, "internal error: can't hash `%s': %s\n", | |
1361 | inst->name, retval); | |
1362 | else | |
1363 | strcpy (prev_name, inst->name); | |
1364 | return retval == NULL; | |
1365 | } | |
1366 | ||
1367 | /* Make a new instruction template. */ | |
1368 | static c4x_inst_t * | |
75d12d11 AM |
1369 | c4x_inst_make (name, opcode, args) |
1370 | char *name; | |
1371 | unsigned long opcode; | |
1372 | char *args; | |
026df7c5 NC |
1373 | { |
1374 | static c4x_inst_t *insts = NULL; | |
1375 | static char *names = NULL; | |
1376 | static int index = 0; | |
1377 | ||
1378 | if (insts == NULL) | |
1379 | { | |
1380 | /* Allocate memory to store name strings. */ | |
1381 | names = (char *) xmalloc (sizeof (char) * 8192); | |
1382 | /* Allocate memory for additional insts. */ | |
1383 | insts = (c4x_inst_t *) | |
1384 | xmalloc (sizeof (c4x_inst_t) * 1024); | |
1385 | } | |
1386 | insts[index].name = names; | |
1387 | insts[index].opcode = opcode; | |
1388 | insts[index].opmask = 0xffffffff; | |
1389 | insts[index].args = args; | |
1390 | index++; | |
1391 | ||
1392 | do | |
1393 | *names++ = *name++; | |
1394 | while (*name); | |
1395 | *names++ = '\0'; | |
1396 | ||
1397 | return &insts[index - 1]; | |
1398 | } | |
1399 | ||
1400 | /* Add instruction template, creating dynamic templates as required. */ | |
1401 | static int | |
75d12d11 AM |
1402 | c4x_inst_add (insts) |
1403 | c4x_inst_t *insts; | |
026df7c5 NC |
1404 | { |
1405 | char *s = insts->name; | |
1406 | char *d; | |
1407 | unsigned int i; | |
1408 | int ok = 1; | |
1409 | char name[16]; | |
1410 | ||
1411 | d = name; | |
1412 | ||
9c87d6c7 SS |
1413 | /* We do not care about INSNs that is not a part of our |
1414 | oplevel setting */ | |
1415 | if (!insts->oplevel & c4x_oplevel) | |
1416 | return ok; | |
1417 | ||
026df7c5 NC |
1418 | while (1) |
1419 | { | |
1420 | switch (*s) | |
1421 | { | |
1422 | case 'B': | |
1423 | case 'C': | |
1424 | /* Dynamically create all the conditional insts. */ | |
1425 | for (i = 0; i < num_conds; i++) | |
1426 | { | |
1427 | c4x_inst_t *inst; | |
1428 | int k = 0; | |
1429 | char *c = c4x_conds[i].name; | |
1430 | char *e = d; | |
1431 | ||
1432 | while (*c) | |
1433 | *e++ = *c++; | |
1434 | c = s + 1; | |
1435 | while (*c) | |
1436 | *e++ = *c++; | |
1437 | *e = '\0'; | |
1438 | ||
1439 | /* If instruction found then have already processed it. */ | |
1440 | if (hash_find (c4x_op_hash, name)) | |
1441 | return 1; | |
1442 | ||
1443 | do | |
1444 | { | |
1445 | inst = c4x_inst_make (name, insts[k].opcode + | |
1446 | (c4x_conds[i].cond << | |
1447 | (*s == 'B' ? 16 : 23)), | |
1448 | insts[k].args); | |
1449 | if (k == 0) /* Save strcmp() with following func. */ | |
1450 | ok &= c4x_inst_insert (inst); | |
1451 | k++; | |
1452 | } | |
1453 | while (!strcmp (insts->name, | |
1454 | insts[k].name)); | |
1455 | } | |
1456 | return ok; | |
1457 | break; | |
1458 | ||
1459 | case '\0': | |
1460 | return c4x_inst_insert (insts); | |
1461 | break; | |
1462 | ||
1463 | default: | |
1464 | *d++ = *s++; | |
1465 | break; | |
1466 | } | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | /* This function is called once, at assembler startup time. It should | |
1471 | set up all the tables, etc., that the MD part of the assembler will | |
1472 | need. */ | |
1473 | void | |
75d12d11 | 1474 | md_begin () |
026df7c5 NC |
1475 | { |
1476 | int ok = 1; | |
1477 | unsigned int i; | |
1478 | ||
9c87d6c7 SS |
1479 | /* Setup the proper opcode level according to the |
1480 | commandline parameters */ | |
1481 | c4x_oplevel = OP_C3X; | |
1482 | ||
1483 | if ( IS_CPU_C4X(c4x_cpu) ) | |
1484 | c4x_oplevel |= OP_C4X; | |
1485 | ||
1486 | if ( ( c4x_cpu == 31 && c4x_revision >= 6) | |
1487 | || (c4x_cpu == 32 && c4x_revision >= 2) | |
1488 | || (c4x_cpu == 33) | |
1489 | || c4x_enhanced ) | |
1490 | c4x_oplevel |= OP_ENH; | |
1491 | ||
1492 | if ( ( c4x_cpu == 30 && c4x_revision >= 7) | |
1493 | || (c4x_cpu == 31 && c4x_revision >= 5) | |
1494 | || (c4x_cpu == 32) | |
1495 | || c4x_lowpower ) | |
1496 | c4x_oplevel |= OP_LPWR; | |
1497 | ||
1498 | if ( ( c4x_cpu == 30 && c4x_revision >= 7) | |
1499 | || (c4x_cpu == 31 && c4x_revision >= 5) | |
1500 | || (c4x_cpu == 32) | |
1501 | || (c4x_cpu == 33) | |
1502 | || (c4x_cpu == 40 && c4x_revision >= 5) | |
1503 | || (c4x_cpu == 44) | |
1504 | || c4x_idle2 ) | |
1505 | c4x_oplevel |= OP_IDLE2; | |
1506 | ||
026df7c5 NC |
1507 | /* Create hash table for mnemonics. */ |
1508 | c4x_op_hash = hash_new (); | |
1509 | ||
1510 | /* Create hash table for asg pseudo. */ | |
1511 | c4x_asg_hash = hash_new (); | |
1512 | ||
1513 | /* Add mnemonics to hash table, expanding conditional mnemonics on fly. */ | |
9c87d6c7 SS |
1514 | for (i = 0; i < c4x_num_insts; i++) |
1515 | ok &= c4x_inst_add ((void *) &c4x_insts[i]); | |
026df7c5 NC |
1516 | |
1517 | /* Create dummy inst to avoid errors accessing end of table. */ | |
1518 | c4x_inst_make ("", 0, ""); | |
1519 | ||
1520 | if (!ok) | |
1521 | as_fatal ("Broken assembler. No assembly attempted."); | |
1522 | ||
1523 | /* Add registers to symbol table. */ | |
1524 | c4x_init_regtable (); | |
1525 | ||
1526 | /* Add predefined symbols to symbol table. */ | |
1527 | c4x_init_symbols (); | |
1528 | } | |
1529 | ||
1530 | void | |
75d12d11 | 1531 | c4x_end () |
026df7c5 NC |
1532 | { |
1533 | bfd_set_arch_mach (stdoutput, bfd_arch_tic4x, | |
1534 | IS_CPU_C4X (c4x_cpu) ? bfd_mach_c4x : bfd_mach_c3x); | |
1535 | } | |
1536 | ||
1537 | static int | |
75d12d11 AM |
1538 | c4x_indirect_parse (operand, indirect) |
1539 | c4x_operand_t *operand; | |
1540 | const c4x_indirect_t *indirect; | |
026df7c5 NC |
1541 | { |
1542 | char *n = indirect->name; | |
1543 | char *s = input_line_pointer; | |
1544 | char *b; | |
1545 | symbolS *symbolP; | |
1546 | char name[32]; | |
1547 | ||
1548 | operand->disp = 0; | |
1549 | for (; *n; n++) | |
1550 | { | |
1551 | switch (*n) | |
1552 | { | |
1553 | case 'a': /* Need to match aux register. */ | |
1554 | b = name; | |
1555 | #ifdef C4X_ALT_SYNTAX | |
1556 | if (*s == '%') | |
1557 | s++; | |
1558 | #endif | |
1559 | while (isalnum (*s)) | |
1560 | *b++ = *s++; | |
1561 | *b++ = '\0'; | |
1562 | if (!(symbolP = symbol_find (name))) | |
1563 | return 0; | |
1564 | ||
1565 | if (S_GET_SEGMENT (symbolP) != reg_section) | |
1566 | return 0; | |
1567 | ||
1568 | operand->aregno = S_GET_VALUE (symbolP); | |
1569 | if (operand->aregno >= REG_AR0 && operand->aregno <= REG_AR7) | |
1570 | break; | |
1571 | ||
1572 | as_bad ("Auxiliary register AR0--AR7 required for indirect"); | |
1573 | return -1; | |
1574 | ||
1575 | case 'd': /* Need to match constant for disp. */ | |
1576 | #ifdef C4X_ALT_SYNTAX | |
1577 | if (*s == '%') /* expr() will die if we don't skip this. */ | |
1578 | s++; | |
1579 | #endif | |
1580 | s = c4x_expression (s, &operand->expr); | |
1581 | if (operand->expr.X_op != O_constant) | |
1582 | return 0; | |
1583 | operand->disp = operand->expr.X_add_number; | |
1584 | if (operand->disp < 0 || operand->disp > 255) | |
1585 | { | |
1586 | as_bad ("Bad displacement %d (require 0--255)\n", | |
1587 | operand->disp); | |
1588 | return -1; | |
1589 | } | |
1590 | break; | |
1591 | ||
1592 | case 'y': /* Need to match IR0. */ | |
1593 | case 'z': /* Need to match IR1. */ | |
1594 | #ifdef C4X_ALT_SYNTAX | |
1595 | if (*s == '%') | |
1596 | s++; | |
1597 | #endif | |
1598 | s = c4x_expression (s, &operand->expr); | |
1599 | if (operand->expr.X_op != O_register) | |
1600 | return 0; | |
1601 | if (operand->expr.X_add_number != REG_IR0 | |
1602 | && operand->expr.X_add_number != REG_IR1) | |
1603 | { | |
1604 | as_bad ("Index register IR0,IR1 required for displacement"); | |
1605 | return -1; | |
1606 | } | |
1607 | ||
1608 | if (*n == 'y' && operand->expr.X_add_number == REG_IR0) | |
1609 | break; | |
1610 | if (*n == 'z' && operand->expr.X_add_number == REG_IR1) | |
1611 | break; | |
1612 | return 0; | |
1613 | ||
1614 | case '(': | |
1615 | if (*s != '(') /* No displacement, assume to be 1. */ | |
1616 | { | |
1617 | operand->disp = 1; | |
1618 | while (*n != ')') | |
1619 | n++; | |
1620 | } | |
1621 | else | |
1622 | s++; | |
1623 | break; | |
1624 | ||
1625 | default: | |
1626 | if (tolower (*s) != *n) | |
1627 | return 0; | |
1628 | s++; | |
1629 | } | |
1630 | } | |
1631 | if (*s != ' ' && *s != ',' && *s != '\0') | |
1632 | return 0; | |
1633 | input_line_pointer = s; | |
1634 | return 1; | |
1635 | } | |
1636 | ||
247b1fe6 | 1637 | static char * |
75d12d11 AM |
1638 | c4x_operand_parse (s, operand) |
1639 | char *s; | |
1640 | c4x_operand_t *operand; | |
026df7c5 NC |
1641 | { |
1642 | unsigned int i; | |
1643 | char c; | |
1644 | int ret; | |
1645 | expressionS *exp = &operand->expr; | |
1646 | char *save = input_line_pointer; | |
1647 | char *str; | |
1648 | char *new; | |
1649 | struct hash_entry *entry = NULL; | |
1650 | ||
1651 | input_line_pointer = s; | |
1652 | SKIP_WHITESPACE (); | |
1653 | ||
1654 | str = input_line_pointer; | |
1655 | c = get_symbol_end (); /* Get terminator. */ | |
1656 | new = input_line_pointer; | |
1657 | if (strlen (str) && (entry = hash_find (c4x_asg_hash, str)) != NULL) | |
1658 | { | |
1659 | *input_line_pointer = c; | |
1660 | input_line_pointer = (char *) entry; | |
1661 | } | |
1662 | else | |
1663 | { | |
1664 | *input_line_pointer = c; | |
1665 | input_line_pointer = str; | |
1666 | } | |
1667 | ||
1668 | operand->mode = M_UNKNOWN; | |
1669 | switch (*input_line_pointer) | |
1670 | { | |
1671 | #ifdef C4X_ALT_SYNTAX | |
1672 | case '%': | |
1673 | input_line_pointer = c4x_expression (++input_line_pointer, exp); | |
1674 | if (exp->X_op != O_register) | |
1675 | as_bad ("Expecting a register name"); | |
1676 | operand->mode = M_REGISTER; | |
1677 | break; | |
1678 | ||
1679 | case '^': | |
1680 | /* Denotes high 16 bits. */ | |
1681 | input_line_pointer = c4x_expression (++input_line_pointer, exp); | |
1682 | if (exp->X_op == O_constant) | |
1683 | operand->mode = M_IMMED; | |
1684 | else if (exp->X_op == O_big) | |
1685 | { | |
1686 | if (exp->X_add_number) | |
1687 | as_bad ("Number too large"); /* bignum required */ | |
1688 | else | |
1689 | { | |
1690 | c4x_gen_to_words (generic_floating_point_number, | |
1691 | operand->fwords, S_PRECISION); | |
1692 | operand->mode = M_IMMED_F; | |
1693 | } | |
1694 | } | |
1695 | /* Allow ori ^foo, ar0 to be equivalent to ldi .hi.foo, ar0 */ | |
1696 | /* WARNING : The TI C40 assembler cannot do this. */ | |
1697 | else if (exp->X_op == O_symbol) | |
1698 | { | |
1699 | operand->mode = M_HI; | |
1700 | break; | |
1701 | } | |
1702 | ||
1703 | case '#': | |
1704 | input_line_pointer = c4x_expression (++input_line_pointer, exp); | |
1705 | if (exp->X_op == O_constant) | |
1706 | operand->mode = M_IMMED; | |
1707 | else if (exp->X_op == O_big) | |
1708 | { | |
1709 | if (exp->X_add_number > 0) | |
1710 | as_bad ("Number too large"); /* bignum required. */ | |
1711 | else | |
1712 | { | |
1713 | c4x_gen_to_words (generic_floating_point_number, | |
1714 | operand->fwords, S_PRECISION); | |
1715 | operand->mode = M_IMMED_F; | |
1716 | } | |
1717 | } | |
1718 | /* Allow ori foo, ar0 to be equivalent to ldi .lo.foo, ar0 */ | |
1719 | /* WARNING : The TI C40 assembler cannot do this. */ | |
1720 | else if (exp->X_op == O_symbol) | |
1721 | { | |
1722 | operand->mode = M_IMMED; | |
1723 | break; | |
1724 | } | |
1725 | ||
1726 | else | |
1727 | as_bad ("Expecting a constant value"); | |
1728 | break; | |
1729 | case '\\': | |
1730 | #endif | |
1731 | case '@': | |
1732 | input_line_pointer = c4x_expression (++input_line_pointer, exp); | |
1733 | if (exp->X_op != O_constant && exp->X_op != O_symbol) | |
1734 | as_bad ("Bad direct addressing construct %s", s); | |
1735 | if (exp->X_op == O_constant) | |
1736 | { | |
1737 | if (exp->X_add_number < 0) | |
1738 | as_bad ("Direct value of %ld is not suitable", | |
1739 | (long) exp->X_add_number); | |
1740 | } | |
1741 | operand->mode = M_DIRECT; | |
1742 | break; | |
1743 | ||
1744 | case '*': | |
1745 | ret = -1; | |
9c87d6c7 | 1746 | for (i = 0; i < c4x_num_indirects; i++) |
026df7c5 NC |
1747 | if ((ret = c4x_indirect_parse (operand, &c4x_indirects[i]))) |
1748 | break; | |
1749 | if (ret < 0) | |
1750 | break; | |
9c87d6c7 | 1751 | if (i < c4x_num_indirects) |
026df7c5 NC |
1752 | { |
1753 | operand->mode = M_INDIRECT; | |
1754 | /* Indirect addressing mode number. */ | |
1755 | operand->expr.X_add_number = c4x_indirects[i].modn; | |
1756 | /* Convert *+ARn(0) to *ARn etc. Maybe we should | |
1757 | squeal about silly ones? */ | |
1758 | if (operand->expr.X_add_number < 0x08 && !operand->disp) | |
1759 | operand->expr.X_add_number = 0x18; | |
1760 | } | |
1761 | else | |
1762 | as_bad ("Unknown indirect addressing mode"); | |
1763 | break; | |
1764 | ||
1765 | default: | |
1766 | operand->mode = M_IMMED; /* Assume immediate. */ | |
1767 | str = input_line_pointer; | |
1768 | input_line_pointer = c4x_expression (input_line_pointer, exp); | |
1769 | if (exp->X_op == O_register) | |
1770 | { | |
1771 | know (exp->X_add_symbol == 0); | |
1772 | know (exp->X_op_symbol == 0); | |
1773 | operand->mode = M_REGISTER; | |
1774 | break; | |
1775 | } | |
1776 | else if (exp->X_op == O_big) | |
1777 | { | |
1778 | if (exp->X_add_number > 0) | |
1779 | as_bad ("Number too large"); /* bignum required. */ | |
1780 | else | |
1781 | { | |
1782 | c4x_gen_to_words (generic_floating_point_number, | |
1783 | operand->fwords, S_PRECISION); | |
1784 | operand->mode = M_IMMED_F; | |
1785 | } | |
1786 | break; | |
1787 | } | |
1788 | #ifdef C4X_ALT_SYNTAX | |
1789 | /* Allow ldi foo, ar0 to be equivalent to ldi @foo, ar0. */ | |
1790 | else if (exp->X_op == O_symbol) | |
1791 | { | |
1792 | operand->mode = M_DIRECT; | |
1793 | break; | |
1794 | } | |
1795 | #endif | |
1796 | } | |
1797 | if (entry == NULL) | |
1798 | new = input_line_pointer; | |
1799 | input_line_pointer = save; | |
1800 | return new; | |
1801 | } | |
1802 | ||
1803 | static int | |
9c87d6c7 | 1804 | c4x_operands_match (inst, insn, check) |
75d12d11 AM |
1805 | c4x_inst_t *inst; |
1806 | c4x_insn_t *insn; | |
9c87d6c7 | 1807 | int check; |
026df7c5 NC |
1808 | { |
1809 | const char *args = inst->args; | |
1810 | unsigned long opcode = inst->opcode; | |
1811 | int num_operands = insn->num_operands; | |
1812 | c4x_operand_t *operand = insn->operands; | |
1813 | expressionS *exp = &operand->expr; | |
1814 | int ret = 1; | |
1815 | int reg; | |
1816 | ||
1817 | /* Build the opcode, checking as we go to make sure that the | |
1818 | operands match. | |
1819 | ||
1820 | If an operand matches, we modify insn or opcode appropriately, | |
1821 | and do a "continue". If an operand fails to match, we "break". */ | |
1822 | ||
1823 | insn->nchars = 4; /* Instructions always 4 bytes. */ | |
1824 | insn->reloc = NO_RELOC; | |
1825 | insn->pcrel = 0; | |
1826 | ||
1827 | if (*args == '\0') | |
1828 | { | |
1829 | insn->opcode = opcode; | |
1830 | return num_operands == 0; | |
1831 | } | |
1832 | ||
1833 | for (;; ++args) | |
1834 | { | |
1835 | switch (*args) | |
1836 | { | |
1837 | ||
1838 | case '\0': /* End of args. */ | |
1839 | if (num_operands == 1) | |
1840 | { | |
1841 | insn->opcode = opcode; | |
1842 | return ret; | |
1843 | } | |
1844 | break; /* Too many operands. */ | |
1845 | ||
1846 | case '#': /* This is only used for ldp. */ | |
1847 | if (operand->mode != M_DIRECT && operand->mode != M_IMMED) | |
1848 | break; | |
1849 | /* While this looks like a direct addressing mode, we actually | |
1850 | use an immediate mode form of ldiu or ldpk instruction. */ | |
1851 | if (exp->X_op == O_constant) | |
1852 | { | |
44287f60 SS |
1853 | if( ( IS_CPU_C4X (c4x_cpu) && exp->X_add_number <= 65535 ) |
1854 | || ( IS_CPU_C3X (c4x_cpu) && exp->X_add_number <= 255 ) ) | |
1855 | { | |
1856 | INSERTS (opcode, exp->X_add_number, 15, 0); | |
1857 | continue; | |
1858 | } | |
1859 | else | |
1860 | { | |
9c87d6c7 SS |
1861 | if (!check) |
1862 | as_bad ("Immediate value of %ld is too large for ldf", | |
1863 | (long) exp->X_add_number); | |
44287f60 SS |
1864 | ret = -1; |
1865 | continue; | |
1866 | } | |
026df7c5 NC |
1867 | } |
1868 | else if (exp->X_op == O_symbol) | |
1869 | { | |
1870 | insn->reloc = BFD_RELOC_HI16; | |
1871 | insn->exp = *exp; | |
1872 | continue; | |
1873 | } | |
1874 | break; /* Not direct (dp) addressing. */ | |
1875 | ||
1876 | case '@': /* direct. */ | |
1877 | if (operand->mode != M_DIRECT) | |
1878 | break; | |
1879 | if (exp->X_op == O_constant) | |
da91385d SS |
1880 | { |
1881 | /* Store only the 16 LSBs of the number. */ | |
1882 | INSERTS (opcode, exp->X_add_number, 15, 0); | |
1883 | continue; | |
026df7c5 NC |
1884 | } |
1885 | else if (exp->X_op == O_symbol) | |
1886 | { | |
1887 | insn->reloc = BFD_RELOC_LO16; | |
1888 | insn->exp = *exp; | |
1889 | continue; | |
1890 | } | |
1891 | break; /* Not direct addressing. */ | |
1892 | ||
1893 | case 'A': | |
1894 | if (operand->mode != M_REGISTER) | |
1895 | break; | |
1896 | reg = exp->X_add_number; | |
1897 | if (reg >= REG_AR0 && reg <= REG_AR7) | |
1898 | INSERTU (opcode, reg - REG_AR0, 24, 22); | |
1899 | else | |
1900 | { | |
9c87d6c7 SS |
1901 | if (!check) |
1902 | as_bad ("Destination register must be ARn"); | |
026df7c5 NC |
1903 | ret = -1; |
1904 | } | |
1905 | continue; | |
1906 | ||
1907 | case 'B': /* Unsigned integer immediate. */ | |
1908 | /* Allow br label or br @label. */ | |
1909 | if (operand->mode != M_IMMED && operand->mode != M_DIRECT) | |
1910 | break; | |
1911 | if (exp->X_op == O_constant) | |
1912 | { | |
1913 | if (exp->X_add_number < (1 << 24)) | |
1914 | { | |
1915 | INSERTU (opcode, exp->X_add_number, 23, 0); | |
1916 | continue; | |
1917 | } | |
1918 | else | |
1919 | { | |
9c87d6c7 SS |
1920 | if (!check) |
1921 | as_bad ("Immediate value of %ld is too large", | |
1922 | (long) exp->X_add_number); | |
026df7c5 NC |
1923 | ret = -1; |
1924 | continue; | |
1925 | } | |
1926 | } | |
1927 | if (IS_CPU_C4X (c4x_cpu)) | |
1928 | { | |
1929 | insn->reloc = BFD_RELOC_24_PCREL; | |
1930 | insn->pcrel = 1; | |
1931 | } | |
1932 | else | |
1933 | { | |
1934 | insn->reloc = BFD_RELOC_24; | |
1935 | insn->pcrel = 0; | |
1936 | } | |
1937 | insn->exp = *exp; | |
1938 | continue; | |
1939 | ||
1940 | case 'C': | |
1941 | if (!IS_CPU_C4X (c4x_cpu)) | |
1942 | break; | |
1943 | if (operand->mode != M_INDIRECT) | |
1944 | break; | |
44287f60 | 1945 | /* Require either *+ARn(disp) or *ARn. */ |
026df7c5 NC |
1946 | if (operand->expr.X_add_number != 0 |
1947 | && operand->expr.X_add_number != 0x18) | |
1948 | { | |
9c87d6c7 SS |
1949 | if (!check) |
1950 | as_bad ("Invalid indirect addressing mode"); | |
1951 | ret = -1; | |
026df7c5 NC |
1952 | continue; |
1953 | } | |
1954 | INSERTU (opcode, operand->aregno - REG_AR0, 2, 0); | |
1955 | INSERTU (opcode, operand->disp, 7, 3); | |
1956 | continue; | |
1957 | ||
1958 | case 'E': | |
1959 | if (!(operand->mode == M_REGISTER)) | |
1960 | break; | |
1961 | INSERTU (opcode, exp->X_add_number, 7, 0); | |
1962 | continue; | |
1963 | ||
44287f60 SS |
1964 | case 'e': |
1965 | if (!(operand->mode == M_REGISTER)) | |
1966 | break; | |
1967 | reg = exp->X_add_number; | |
1968 | if ( (reg >= REG_R0 && reg <= REG_R7) | |
1969 | || (IS_CPU_C4X (c4x_cpu) && reg >= REG_R8 && reg <= REG_R11) ) | |
1970 | INSERTU (opcode, reg, 7, 0); | |
1971 | else | |
1972 | { | |
9c87d6c7 SS |
1973 | if (!check) |
1974 | as_bad ("Register must be Rn"); | |
44287f60 SS |
1975 | ret = -1; |
1976 | } | |
1977 | continue; | |
1978 | ||
026df7c5 NC |
1979 | case 'F': |
1980 | if (operand->mode != M_IMMED_F | |
1981 | && !(operand->mode == M_IMMED && exp->X_op == O_constant)) | |
1982 | break; | |
1983 | ||
1984 | if (operand->mode != M_IMMED_F) | |
1985 | { | |
1986 | /* OK, we 've got something like cmpf 0, r0 | |
1987 | Why can't they stick in a bloody decimal point ?! */ | |
1988 | char string[16]; | |
1989 | ||
1990 | /* Create floating point number string. */ | |
1991 | sprintf (string, "%d.0", (int) exp->X_add_number); | |
1992 | c4x_atof (string, 's', operand->fwords); | |
1993 | } | |
1994 | ||
1995 | INSERTU (opcode, operand->fwords[0], 15, 0); | |
1996 | continue; | |
1997 | ||
1998 | case 'G': | |
1999 | if (operand->mode != M_REGISTER) | |
2000 | break; | |
2001 | INSERTU (opcode, exp->X_add_number, 15, 8); | |
2002 | continue; | |
2003 | ||
44287f60 SS |
2004 | case 'g': |
2005 | if (operand->mode != M_REGISTER) | |
2006 | break; | |
2007 | reg = exp->X_add_number; | |
2008 | if ( (reg >= REG_R0 && reg <= REG_R7) | |
2009 | || (IS_CPU_C4X (c4x_cpu) && reg >= REG_R8 && reg <= REG_R11) ) | |
2010 | INSERTU (opcode, reg, 15, 8); | |
2011 | else | |
2012 | { | |
9c87d6c7 SS |
2013 | if (!check) |
2014 | as_bad ("Register must be Rn"); | |
44287f60 SS |
2015 | ret = -1; |
2016 | } | |
2017 | continue; | |
2018 | ||
026df7c5 NC |
2019 | case 'H': |
2020 | if (operand->mode != M_REGISTER) | |
2021 | break; | |
2022 | reg = exp->X_add_number; | |
2023 | if (reg >= REG_R0 && reg <= REG_R7) | |
2024 | INSERTU (opcode, reg - REG_R0, 18, 16); | |
2025 | else | |
2026 | { | |
9c87d6c7 SS |
2027 | if (!check) |
2028 | as_bad ("Register must be R0--R7"); | |
026df7c5 NC |
2029 | ret = -1; |
2030 | } | |
2031 | continue; | |
2032 | ||
9c87d6c7 SS |
2033 | case 'i': |
2034 | if ( operand->mode == M_REGISTER | |
2035 | && c4x_oplevel & OP_ENH ) | |
2036 | { | |
2037 | reg = exp->X_add_number; | |
2038 | INSERTU (opcode, reg, 4, 0); | |
2039 | INSERTU (opcode, 7, 7, 5); | |
2040 | continue; | |
2041 | } | |
2042 | /* Fallthrough */ | |
2043 | ||
026df7c5 NC |
2044 | case 'I': |
2045 | if (operand->mode != M_INDIRECT) | |
2046 | break; | |
2047 | if (operand->disp != 0 && operand->disp != 1) | |
2048 | { | |
2049 | if (IS_CPU_C4X (c4x_cpu)) | |
2050 | break; | |
9c87d6c7 SS |
2051 | if (!check) |
2052 | as_bad ("Invalid indirect addressing mode displacement %d", | |
2053 | operand->disp); | |
026df7c5 NC |
2054 | ret = -1; |
2055 | continue; | |
2056 | } | |
2057 | INSERTU (opcode, operand->aregno - REG_AR0, 2, 0); | |
2058 | INSERTU (opcode, operand->expr.X_add_number, 7, 3); | |
2059 | continue; | |
2060 | ||
9c87d6c7 SS |
2061 | case 'j': |
2062 | if ( operand->mode == M_REGISTER | |
2063 | && c4x_oplevel & OP_ENH ) | |
2064 | { | |
2065 | reg = exp->X_add_number; | |
2066 | INSERTU (opcode, reg, 12, 8); | |
2067 | INSERTU (opcode, 7, 15, 13); | |
2068 | continue; | |
2069 | } | |
2070 | /* Fallthrough */ | |
2071 | ||
026df7c5 NC |
2072 | case 'J': |
2073 | if (operand->mode != M_INDIRECT) | |
2074 | break; | |
2075 | if (operand->disp != 0 && operand->disp != 1) | |
2076 | { | |
2077 | if (IS_CPU_C4X (c4x_cpu)) | |
2078 | break; | |
9c87d6c7 SS |
2079 | if (!check) |
2080 | as_bad ("Invalid indirect addressing mode displacement %d", | |
2081 | operand->disp); | |
026df7c5 NC |
2082 | ret = -1; |
2083 | continue; | |
2084 | } | |
2085 | INSERTU (opcode, operand->aregno - REG_AR0, 10, 8); | |
2086 | INSERTU (opcode, operand->expr.X_add_number, 15, 11); | |
2087 | continue; | |
2088 | ||
2089 | case 'K': | |
2090 | if (operand->mode != M_REGISTER) | |
2091 | break; | |
2092 | reg = exp->X_add_number; | |
2093 | if (reg >= REG_R0 && reg <= REG_R7) | |
2094 | INSERTU (opcode, reg - REG_R0, 21, 19); | |
2095 | else | |
2096 | { | |
9c87d6c7 SS |
2097 | if (!check) |
2098 | as_bad ("Register must be R0--R7"); | |
026df7c5 NC |
2099 | ret = -1; |
2100 | } | |
2101 | continue; | |
2102 | ||
2103 | case 'L': | |
2104 | if (operand->mode != M_REGISTER) | |
2105 | break; | |
2106 | reg = exp->X_add_number; | |
2107 | if (reg >= REG_R0 && reg <= REG_R7) | |
2108 | INSERTU (opcode, reg - REG_R0, 24, 22); | |
2109 | else | |
2110 | { | |
9c87d6c7 SS |
2111 | if (!check) |
2112 | as_bad ("Register must be R0--R7"); | |
026df7c5 NC |
2113 | ret = -1; |
2114 | } | |
2115 | continue; | |
2116 | ||
2117 | case 'M': | |
2118 | if (operand->mode != M_REGISTER) | |
2119 | break; | |
2120 | reg = exp->X_add_number; | |
2121 | if (reg == REG_R2 || reg == REG_R3) | |
2122 | INSERTU (opcode, reg - REG_R2, 22, 22); | |
2123 | else | |
2124 | { | |
9c87d6c7 SS |
2125 | if (!check) |
2126 | as_bad ("Destination register must be R2 or R3"); | |
026df7c5 NC |
2127 | ret = -1; |
2128 | } | |
2129 | continue; | |
2130 | ||
2131 | case 'N': | |
2132 | if (operand->mode != M_REGISTER) | |
2133 | break; | |
2134 | reg = exp->X_add_number; | |
2135 | if (reg == REG_R0 || reg == REG_R1) | |
2136 | INSERTU (opcode, reg - REG_R0, 23, 23); | |
2137 | else | |
2138 | { | |
9c87d6c7 SS |
2139 | if (!check) |
2140 | as_bad ("Destination register must be R0 or R1"); | |
026df7c5 NC |
2141 | ret = -1; |
2142 | } | |
2143 | continue; | |
2144 | ||
2145 | case 'O': | |
2146 | if (!IS_CPU_C4X (c4x_cpu)) | |
2147 | break; | |
2148 | if (operand->mode != M_INDIRECT) | |
2149 | break; | |
2150 | /* Require either *+ARn(disp) or *ARn. */ | |
2151 | if (operand->expr.X_add_number != 0 | |
2152 | && operand->expr.X_add_number != 0x18) | |
2153 | { | |
9c87d6c7 SS |
2154 | if (!check) |
2155 | as_bad ("Invalid indirect addressing mode"); | |
026df7c5 NC |
2156 | ret = -1; |
2157 | continue; | |
2158 | } | |
2159 | INSERTU (opcode, operand->aregno - REG_AR0, 10, 8); | |
2160 | INSERTU (opcode, operand->disp, 15, 11); | |
2161 | continue; | |
2162 | ||
2163 | case 'P': /* PC relative displacement. */ | |
2164 | /* Allow br label or br @label. */ | |
2165 | if (operand->mode != M_IMMED && operand->mode != M_DIRECT) | |
2166 | break; | |
2167 | if (exp->X_op == O_constant) | |
2168 | { | |
2169 | if (exp->X_add_number >= -32768 && exp->X_add_number <= 32767) | |
2170 | { | |
2171 | INSERTS (opcode, exp->X_add_number, 15, 0); | |
2172 | continue; | |
2173 | } | |
2174 | else | |
2175 | { | |
9c87d6c7 SS |
2176 | if (!check) |
2177 | as_bad ("Displacement value of %ld is too large", | |
2178 | (long) exp->X_add_number); | |
026df7c5 NC |
2179 | ret = -1; |
2180 | continue; | |
2181 | } | |
2182 | } | |
2183 | insn->reloc = BFD_RELOC_16_PCREL; | |
2184 | insn->pcrel = 1; | |
2185 | insn->exp = *exp; | |
2186 | continue; | |
2187 | ||
2188 | case 'Q': | |
2189 | if (operand->mode != M_REGISTER) | |
2190 | break; | |
2191 | reg = exp->X_add_number; | |
2192 | INSERTU (opcode, reg, 15, 0); | |
2193 | continue; | |
2194 | ||
44287f60 SS |
2195 | case 'q': |
2196 | if (operand->mode != M_REGISTER) | |
2197 | break; | |
2198 | reg = exp->X_add_number; | |
2199 | if ( (reg >= REG_R0 && reg <= REG_R7) | |
2200 | || (IS_CPU_C4X (c4x_cpu) && reg >= REG_R8 && reg <= REG_R11) ) | |
2201 | INSERTU (opcode, reg, 15, 0); | |
2202 | else | |
2203 | { | |
9c87d6c7 SS |
2204 | if (!check) |
2205 | as_bad ("Register must be Rn"); | |
44287f60 SS |
2206 | ret = -1; |
2207 | } | |
2208 | continue; | |
2209 | ||
026df7c5 NC |
2210 | case 'R': |
2211 | if (operand->mode != M_REGISTER) | |
2212 | break; | |
2213 | reg = exp->X_add_number; | |
2214 | INSERTU (opcode, reg, 20, 16); | |
2215 | continue; | |
2216 | ||
44287f60 SS |
2217 | case 'r': |
2218 | if (operand->mode != M_REGISTER) | |
2219 | break; | |
2220 | reg = exp->X_add_number; | |
2221 | if ( (reg >= REG_R0 && reg <= REG_R7) | |
2222 | || (IS_CPU_C4X (c4x_cpu) && reg >= REG_R8 && reg <= REG_R11) ) | |
2223 | INSERTU (opcode, reg, 20, 16); | |
2224 | else | |
2225 | { | |
9c87d6c7 SS |
2226 | if (!check) |
2227 | as_bad ("Register must be Rn"); | |
44287f60 SS |
2228 | ret = -1; |
2229 | } | |
2230 | continue; | |
2231 | ||
026df7c5 NC |
2232 | case 'S': /* Short immediate int. */ |
2233 | if (operand->mode != M_IMMED && operand->mode != M_HI) | |
2234 | break; | |
2235 | if (exp->X_op == O_big) | |
2236 | { | |
9c87d6c7 SS |
2237 | if (!check) |
2238 | as_bad ("Floating point number not valid in expression"); | |
026df7c5 NC |
2239 | ret = -1; |
2240 | continue; | |
2241 | } | |
2242 | if (exp->X_op == O_constant) | |
2243 | { | |
2244 | if (exp->X_add_number >= -32768 && exp->X_add_number <= 65535) | |
2245 | { | |
2246 | INSERTS (opcode, exp->X_add_number, 15, 0); | |
2247 | continue; | |
2248 | } | |
2249 | else | |
2250 | { | |
9c87d6c7 SS |
2251 | if (!check) |
2252 | as_bad ("Signed immediate value %ld too large", | |
2253 | (long) exp->X_add_number); | |
026df7c5 NC |
2254 | ret = -1; |
2255 | continue; | |
2256 | } | |
2257 | } | |
2258 | else if (exp->X_op == O_symbol) | |
2259 | { | |
2260 | if (operand->mode == M_HI) | |
2261 | { | |
2262 | insn->reloc = BFD_RELOC_HI16; | |
2263 | } | |
2264 | else | |
2265 | { | |
2266 | insn->reloc = BFD_RELOC_LO16; | |
2267 | } | |
2268 | insn->exp = *exp; | |
2269 | continue; | |
2270 | } | |
2271 | /* Handle cases like ldi foo - $, ar0 where foo | |
2272 | is a forward reference. Perhaps we should check | |
2273 | for X_op == O_symbol and disallow things like | |
2274 | ldi foo, ar0. */ | |
2275 | insn->reloc = BFD_RELOC_16; | |
2276 | insn->exp = *exp; | |
2277 | continue; | |
2278 | ||
2279 | case 'T': /* 5-bit immediate value for c4x stik. */ | |
2280 | if (!IS_CPU_C4X (c4x_cpu)) | |
2281 | break; | |
2282 | if (operand->mode != M_IMMED) | |
2283 | break; | |
2284 | if (exp->X_op == O_constant) | |
2285 | { | |
2286 | if (exp->X_add_number < 16 && exp->X_add_number >= -16) | |
2287 | { | |
2288 | INSERTS (opcode, exp->X_add_number, 20, 16); | |
2289 | continue; | |
2290 | } | |
2291 | else | |
2292 | { | |
9c87d6c7 SS |
2293 | if (!check) |
2294 | as_bad ("Immediate value of %ld is too large", | |
2295 | (long) exp->X_add_number); | |
026df7c5 NC |
2296 | ret = -1; |
2297 | continue; | |
2298 | } | |
2299 | } | |
2300 | break; /* No relocations allowed. */ | |
2301 | ||
2302 | case 'U': /* Unsigned integer immediate. */ | |
2303 | if (operand->mode != M_IMMED && operand->mode != M_HI) | |
2304 | break; | |
2305 | if (exp->X_op == O_constant) | |
2306 | { | |
2307 | if (exp->X_add_number < (1 << 16) && exp->X_add_number >= 0) | |
2308 | { | |
2309 | INSERTU (opcode, exp->X_add_number, 15, 0); | |
2310 | continue; | |
2311 | } | |
2312 | else | |
2313 | { | |
9c87d6c7 SS |
2314 | if (!check) |
2315 | as_bad ("Unsigned immediate value %ld too large", | |
2316 | (long) exp->X_add_number); | |
026df7c5 NC |
2317 | ret = -1; |
2318 | continue; | |
2319 | } | |
2320 | } | |
2321 | else if (exp->X_op == O_symbol) | |
2322 | { | |
2323 | if (operand->mode == M_HI) | |
2324 | insn->reloc = BFD_RELOC_HI16; | |
2325 | else | |
2326 | insn->reloc = BFD_RELOC_LO16; | |
2327 | ||
2328 | insn->exp = *exp; | |
2329 | continue; | |
2330 | } | |
2331 | insn->reloc = BFD_RELOC_16; | |
2332 | insn->exp = *exp; | |
2333 | continue; | |
2334 | ||
2335 | case 'V': /* Trap numbers (immediate field). */ | |
2336 | if (operand->mode != M_IMMED) | |
2337 | break; | |
2338 | if (exp->X_op == O_constant) | |
2339 | { | |
2340 | if (exp->X_add_number < 512 && IS_CPU_C4X (c4x_cpu)) | |
2341 | { | |
2342 | INSERTU (opcode, exp->X_add_number, 8, 0); | |
2343 | continue; | |
2344 | } | |
2345 | else if (exp->X_add_number < 32 && IS_CPU_C3X (c4x_cpu)) | |
2346 | { | |
2347 | INSERTU (opcode, exp->X_add_number | 0x20, 4, 0); | |
2348 | continue; | |
2349 | } | |
2350 | else | |
2351 | { | |
9c87d6c7 SS |
2352 | if (!check) |
2353 | as_bad ("Immediate value of %ld is too large", | |
2354 | (long) exp->X_add_number); | |
026df7c5 NC |
2355 | ret = -1; |
2356 | continue; | |
2357 | } | |
2358 | } | |
2359 | break; /* No relocations allowed. */ | |
2360 | ||
2361 | case 'W': /* Short immediate int (0--7). */ | |
2362 | if (!IS_CPU_C4X (c4x_cpu)) | |
2363 | break; | |
2364 | if (operand->mode != M_IMMED) | |
2365 | break; | |
2366 | if (exp->X_op == O_big) | |
2367 | { | |
9c87d6c7 SS |
2368 | if (!check) |
2369 | as_bad ("Floating point number not valid in expression"); | |
026df7c5 NC |
2370 | ret = -1; |
2371 | continue; | |
2372 | } | |
2373 | if (exp->X_op == O_constant) | |
2374 | { | |
2375 | if (exp->X_add_number >= -256 && exp->X_add_number <= 127) | |
2376 | { | |
2377 | INSERTS (opcode, exp->X_add_number, 7, 0); | |
2378 | continue; | |
2379 | } | |
2380 | else | |
2381 | { | |
9c87d6c7 SS |
2382 | if (!check) |
2383 | as_bad ("Immediate value %ld too large", | |
2384 | (long) exp->X_add_number); | |
026df7c5 NC |
2385 | ret = -1; |
2386 | continue; | |
2387 | } | |
2388 | } | |
2389 | insn->reloc = BFD_RELOC_16; | |
2390 | insn->exp = *exp; | |
2391 | continue; | |
2392 | ||
2393 | case 'X': /* Expansion register for c4x. */ | |
2394 | if (operand->mode != M_REGISTER) | |
2395 | break; | |
2396 | reg = exp->X_add_number; | |
2397 | if (reg >= REG_IVTP && reg <= REG_TVTP) | |
2398 | INSERTU (opcode, reg - REG_IVTP, 4, 0); | |
2399 | else | |
2400 | { | |
9c87d6c7 SS |
2401 | if (!check) |
2402 | as_bad ("Register must be ivtp or tvtp"); | |
026df7c5 NC |
2403 | ret = -1; |
2404 | } | |
2405 | continue; | |
2406 | ||
2407 | case 'Y': /* Address register for c4x lda. */ | |
2408 | if (operand->mode != M_REGISTER) | |
2409 | break; | |
2410 | reg = exp->X_add_number; | |
2411 | if (reg >= REG_AR0 && reg <= REG_SP) | |
2412 | INSERTU (opcode, reg, 20, 16); | |
2413 | else | |
2414 | { | |
9c87d6c7 SS |
2415 | if (!check) |
2416 | as_bad ("Register must be address register"); | |
026df7c5 NC |
2417 | ret = -1; |
2418 | } | |
2419 | continue; | |
2420 | ||
2421 | case 'Z': /* Expansion register for c4x. */ | |
2422 | if (operand->mode != M_REGISTER) | |
2423 | break; | |
2424 | reg = exp->X_add_number; | |
2425 | if (reg >= REG_IVTP && reg <= REG_TVTP) | |
2426 | INSERTU (opcode, reg - REG_IVTP, 20, 16); | |
2427 | else | |
2428 | { | |
9c87d6c7 SS |
2429 | if (!check) |
2430 | as_bad ("Register must be ivtp or tvtp"); | |
026df7c5 NC |
2431 | ret = -1; |
2432 | } | |
2433 | continue; | |
2434 | ||
2435 | case '*': | |
2436 | if (operand->mode != M_INDIRECT) | |
2437 | break; | |
2438 | INSERTS (opcode, operand->disp, 7, 0); | |
2439 | INSERTU (opcode, operand->aregno - REG_AR0, 10, 8); | |
2440 | INSERTU (opcode, operand->expr.X_add_number, 15, 11); | |
2441 | continue; | |
2442 | ||
2443 | case '|': /* treat as `,' if have ldi_ldi form. */ | |
2444 | if (insn->parallel) | |
2445 | { | |
2446 | if (--num_operands < 0) | |
2447 | break; /* Too few operands. */ | |
2448 | operand++; | |
2449 | if (operand->mode != M_PARALLEL) | |
2450 | break; | |
2451 | } | |
2452 | /* Fall through. */ | |
2453 | ||
2454 | case ',': /* Another operand. */ | |
2455 | if (--num_operands < 0) | |
2456 | break; /* Too few operands. */ | |
2457 | operand++; | |
2458 | exp = &operand->expr; | |
2459 | continue; | |
2460 | ||
2461 | case ';': /* Another optional operand. */ | |
2462 | if (num_operands == 1 || operand[1].mode == M_PARALLEL) | |
2463 | continue; | |
2464 | if (--num_operands < 0) | |
2465 | break; /* Too few operands. */ | |
2466 | operand++; | |
2467 | exp = &operand->expr; | |
2468 | continue; | |
2469 | ||
2470 | default: | |
2471 | BAD_CASE (*args); | |
2472 | } | |
2473 | return 0; | |
2474 | } | |
2475 | } | |
2476 | ||
9c87d6c7 SS |
2477 | static void |
2478 | c4x_insn_check (insn) | |
2479 | c4x_insn_t *insn; | |
2480 | { | |
2481 | ||
2482 | if (!strcmp(insn->name, "lda")) | |
2483 | { | |
2484 | if (insn->num_operands < 2 || insn->num_operands > 2) | |
2485 | as_fatal ("Illegal internal LDA insn definition"); | |
2486 | ||
2487 | if ( insn->operands[0].mode == M_REGISTER | |
2488 | && insn->operands[1].mode == M_REGISTER | |
2489 | && insn->operands[0].expr.X_add_number == insn->operands[1].expr.X_add_number ) | |
2490 | as_bad ("Source and destination register should not be equal"); | |
2491 | } | |
2492 | else if( !strcmp(insn->name, "ldi_ldi") | |
2493 | || !strcmp(insn->name, "ldi1_ldi2") | |
2494 | || !strcmp(insn->name, "ldi2_ldi1") | |
2495 | || !strcmp(insn->name, "ldf_ldf") | |
2496 | || !strcmp(insn->name, "ldf1_ldf2") | |
2497 | || !strcmp(insn->name, "ldf2_ldf1") ) | |
2498 | { | |
2499 | if ( insn->num_operands < 4 && insn->num_operands > 5 ) | |
2500 | as_fatal ("Illegal internal %s insn definition", insn->name); | |
2501 | ||
2502 | if ( insn->operands[1].mode == M_REGISTER | |
2503 | && insn->operands[insn->num_operands-1].mode == M_REGISTER | |
2504 | && insn->operands[1].expr.X_add_number == insn->operands[insn->num_operands-1].expr.X_add_number ) | |
2505 | as_warn ("Equal parallell destination registers, one result will be discarded"); | |
2506 | } | |
2507 | } | |
2508 | ||
247b1fe6 | 2509 | static void |
75d12d11 AM |
2510 | c4x_insn_output (insn) |
2511 | c4x_insn_t *insn; | |
026df7c5 NC |
2512 | { |
2513 | char *dst; | |
2514 | ||
2515 | /* Grab another fragment for opcode. */ | |
2516 | dst = frag_more (insn->nchars); | |
2517 | ||
2518 | /* Put out opcode word as a series of bytes in little endian order. */ | |
2519 | md_number_to_chars (dst, insn->opcode, insn->nchars); | |
2520 | ||
2521 | /* Put out the symbol-dependent stuff. */ | |
2522 | if (insn->reloc != NO_RELOC) | |
2523 | { | |
2524 | /* Where is the offset into the fragment for this instruction. */ | |
2525 | fix_new_exp (frag_now, | |
2526 | dst - frag_now->fr_literal, /* where */ | |
2527 | insn->nchars, /* size */ | |
2528 | &insn->exp, | |
2529 | insn->pcrel, | |
2530 | insn->reloc); | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | /* Parse the operands. */ | |
2535 | int | |
75d12d11 AM |
2536 | c4x_operands_parse (s, operands, num_operands) |
2537 | char *s; | |
2538 | c4x_operand_t *operands; | |
2539 | int num_operands; | |
026df7c5 NC |
2540 | { |
2541 | if (!*s) | |
2542 | return num_operands; | |
2543 | ||
2544 | do | |
2545 | s = c4x_operand_parse (s, &operands[num_operands++]); | |
2546 | while (num_operands < C4X_OPERANDS_MAX && *s++ == ','); | |
2547 | ||
2548 | if (num_operands > C4X_OPERANDS_MAX) | |
2549 | { | |
2550 | as_bad ("Too many operands scanned"); | |
2551 | return -1; | |
2552 | } | |
2553 | return num_operands; | |
2554 | } | |
2555 | ||
2556 | /* Assemble a single instruction. Its label has already been handled | |
2557 | by the generic front end. We just parse mnemonic and operands, and | |
2558 | produce the bytes of data and relocation. */ | |
2559 | void | |
75d12d11 AM |
2560 | md_assemble (str) |
2561 | char *str; | |
026df7c5 NC |
2562 | { |
2563 | int ok = 0; | |
2564 | char *s; | |
2565 | int i; | |
2566 | int parsed = 0; | |
2567 | c4x_inst_t *inst; /* Instruction template. */ | |
9c87d6c7 | 2568 | c4x_inst_t *first_inst; |
026df7c5 NC |
2569 | |
2570 | if (str && insn->parallel) | |
2571 | { | |
2572 | int star; | |
2573 | ||
2574 | /* Find mnemonic (second part of parallel instruction). */ | |
2575 | s = str; | |
2576 | /* Skip past instruction mnemonic. */ | |
2577 | while (*s && *s != ' ' && *s != '*') | |
2578 | s++; | |
2579 | star = *s == '*'; | |
2580 | if (*s) /* Null terminate for hash_find. */ | |
2581 | *s++ = '\0'; /* and skip past null. */ | |
2582 | strcat (insn->name, "_"); | |
2583 | strncat (insn->name, str, C4X_NAME_MAX - strlen (insn->name)); | |
2584 | ||
2585 | /* Kludge to overcome problems with scrubber removing | |
2586 | space between mnemonic and indirect operand (starting with *) | |
2587 | on second line of parallel instruction. */ | |
2588 | if (star) | |
2589 | *--s = '*'; | |
2590 | ||
2591 | insn->operands[insn->num_operands++].mode = M_PARALLEL; | |
2592 | ||
2593 | if ((i = c4x_operands_parse | |
2594 | (s, insn->operands, insn->num_operands)) < 0) | |
2595 | { | |
2596 | insn->parallel = 0; | |
2597 | insn->in_use = 0; | |
2598 | return; | |
2599 | } | |
2600 | insn->num_operands = i; | |
2601 | parsed = 1; | |
2602 | } | |
2603 | ||
2604 | if (insn->in_use) | |
2605 | { | |
2606 | if ((insn->inst = (struct c4x_inst *) | |
2607 | hash_find (c4x_op_hash, insn->name)) == NULL) | |
2608 | { | |
2609 | as_bad ("Unknown opcode `%s'.", insn->name); | |
2610 | insn->parallel = 0; | |
2611 | insn->in_use = 0; | |
2612 | return; | |
2613 | } | |
2614 | ||
026df7c5 | 2615 | inst = insn->inst; |
9c87d6c7 | 2616 | first_inst = NULL; |
026df7c5 | 2617 | do |
9c87d6c7 SS |
2618 | { |
2619 | ok = c4x_operands_match (inst, insn, 1); | |
2620 | if (ok < 0) | |
2621 | { | |
2622 | if (!first_inst) | |
2623 | first_inst = inst; | |
2624 | ok = 0; | |
2625 | } | |
2626 | } while (!ok && !strcmp (inst->name, inst[1].name) && inst++); | |
026df7c5 NC |
2627 | |
2628 | if (ok > 0) | |
9c87d6c7 SS |
2629 | { |
2630 | c4x_insn_check (insn); | |
2631 | c4x_insn_output (insn); | |
2632 | } | |
026df7c5 | 2633 | else if (!ok) |
9c87d6c7 SS |
2634 | { |
2635 | if (first_inst) | |
2636 | c4x_operands_match (first_inst, insn, 0); | |
2637 | as_bad ("Invalid operands for %s", insn->name); | |
2638 | } | |
026df7c5 NC |
2639 | else |
2640 | as_bad ("Invalid instruction %s", insn->name); | |
2641 | } | |
2642 | ||
2643 | if (str && !parsed) | |
2644 | { | |
2645 | /* Find mnemonic. */ | |
2646 | s = str; | |
2647 | while (*s && *s != ' ') /* Skip past instruction mnemonic. */ | |
2648 | s++; | |
2649 | if (*s) /* Null terminate for hash_find. */ | |
2650 | *s++ = '\0'; /* and skip past null. */ | |
2651 | strncpy (insn->name, str, C4X_NAME_MAX - 3); | |
2652 | ||
2653 | if ((i = c4x_operands_parse (s, insn->operands, 0)) < 0) | |
2654 | { | |
2655 | insn->inst = NULL; /* Flag that error occured. */ | |
2656 | insn->parallel = 0; | |
2657 | insn->in_use = 0; | |
2658 | return; | |
2659 | } | |
2660 | insn->num_operands = i; | |
2661 | insn->in_use = 1; | |
2662 | } | |
2663 | else | |
2664 | insn->in_use = 0; | |
2665 | insn->parallel = 0; | |
2666 | } | |
2667 | ||
2668 | void | |
75d12d11 | 2669 | c4x_cleanup () |
026df7c5 NC |
2670 | { |
2671 | if (insn->in_use) | |
2672 | md_assemble (NULL); | |
2673 | } | |
2674 | ||
2675 | /* Turn a string in input_line_pointer into a floating point constant | |
2676 | of type type, and store the appropriate bytes in *litP. The number | |
2677 | of LITTLENUMS emitted is stored in *sizeP. An error message is | |
2678 | returned, or NULL on OK. */ | |
2679 | ||
2680 | char * | |
75d12d11 AM |
2681 | md_atof (type, litP, sizeP) |
2682 | int type; | |
2683 | char *litP; | |
2684 | int *sizeP; | |
026df7c5 NC |
2685 | { |
2686 | int prec; | |
2687 | int ieee; | |
2688 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
2689 | LITTLENUM_TYPE *wordP; | |
2690 | unsigned char *t; | |
2691 | ||
2692 | switch (type) | |
2693 | { | |
2694 | case 's': /* .single */ | |
2695 | case 'S': | |
2696 | ieee = 0; | |
2697 | prec = 1; | |
2698 | break; | |
2699 | ||
2700 | case 'd': /* .double */ | |
2701 | case 'D': | |
2702 | case 'f': /* .float or .single */ | |
2703 | case 'F': | |
2704 | ieee = 0; | |
2705 | prec = 2; /* 1 32-bit word */ | |
2706 | break; | |
2707 | ||
2708 | case 'i': /* .ieee */ | |
247b1fe6 | 2709 | case 'I': |
026df7c5 NC |
2710 | prec = 2; |
2711 | ieee = 1; | |
247b1fe6 | 2712 | type = 'f'; /* Rewrite type to be usable by atof_ieee() */ |
026df7c5 NC |
2713 | break; |
2714 | ||
247b1fe6 SS |
2715 | case 'e': /* .ldouble */ |
2716 | case 'E': | |
026df7c5 | 2717 | prec = 4; /* 2 32-bit words */ |
247b1fe6 | 2718 | ieee = 0; |
026df7c5 NC |
2719 | break; |
2720 | ||
2721 | default: | |
2722 | *sizeP = 0; | |
2723 | return "Bad call to md_atof()"; | |
2724 | } | |
2725 | ||
2726 | if (ieee) | |
2727 | t = atof_ieee (input_line_pointer, type, words); | |
2728 | else | |
2729 | t = c4x_atof (input_line_pointer, type, words); | |
2730 | if (t) | |
2731 | input_line_pointer = t; | |
2732 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
2733 | t = litP; | |
2734 | /* This loops outputs the LITTLENUMs in REVERSE order; in accord with | |
2735 | little endian byte order. */ | |
247b1fe6 SS |
2736 | /* SES: However it is required to put the words (32-bits) out in the |
2737 | correct order, hence we write 2 and 2 littlenums in little endian | |
2738 | order, while we keep the original order on successive words. */ | |
2739 | for(wordP = words; wordP<(words+prec) ; wordP+=2) | |
026df7c5 | 2740 | { |
247b1fe6 SS |
2741 | if (wordP<(words+prec-1)) /* Dump wordP[1] (if we have one) */ |
2742 | { | |
2743 | md_number_to_chars (litP, (valueT) (wordP[1]), | |
2744 | sizeof (LITTLENUM_TYPE)); | |
2745 | litP += sizeof (LITTLENUM_TYPE); | |
2746 | } | |
2747 | ||
2748 | /* Dump wordP[0] */ | |
2749 | md_number_to_chars (litP, (valueT) (wordP[0]), | |
2750 | sizeof (LITTLENUM_TYPE)); | |
026df7c5 NC |
2751 | litP += sizeof (LITTLENUM_TYPE); |
2752 | } | |
2753 | return 0; | |
2754 | } | |
2755 | ||
2756 | void | |
75d12d11 AM |
2757 | md_apply_fix3 (fixP, value, seg) |
2758 | fixS *fixP; | |
2759 | valueT *value; | |
2760 | segT seg ATTRIBUTE_UNUSED; | |
026df7c5 NC |
2761 | { |
2762 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
2763 | valueT val = *value; | |
2764 | ||
2765 | switch (fixP->fx_r_type) | |
2766 | { | |
2767 | case BFD_RELOC_HI16: | |
2768 | val >>= 16; | |
2769 | break; | |
2770 | ||
2771 | case BFD_RELOC_LO16: | |
2772 | val &= 0xffff; | |
2773 | break; | |
2774 | default: | |
2775 | break; | |
2776 | } | |
2777 | ||
2778 | switch (fixP->fx_r_type) | |
2779 | { | |
2780 | case BFD_RELOC_32: | |
2781 | buf[3] = val >> 24; | |
2782 | case BFD_RELOC_24: | |
2783 | case BFD_RELOC_24_PCREL: | |
2784 | buf[2] = val >> 16; | |
2785 | case BFD_RELOC_16: | |
2786 | case BFD_RELOC_16_PCREL: | |
2787 | case BFD_RELOC_LO16: | |
2788 | case BFD_RELOC_HI16: | |
2789 | buf[1] = val >> 8; | |
2790 | buf[0] = val; | |
2791 | break; | |
2792 | ||
2793 | case NO_RELOC: | |
2794 | default: | |
2795 | as_bad ("Bad relocation type: 0x%02x", fixP->fx_r_type); | |
2796 | break; | |
2797 | } | |
2798 | ||
2799 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) fixP->fx_done = 1; | |
2800 | } | |
2801 | ||
2802 | /* Should never be called for c4x. */ | |
2803 | void | |
75d12d11 AM |
2804 | md_convert_frag (headers, sec, fragP) |
2805 | bfd *headers ATTRIBUTE_UNUSED; | |
2806 | segT sec ATTRIBUTE_UNUSED; | |
2807 | fragS *fragP ATTRIBUTE_UNUSED; | |
026df7c5 NC |
2808 | { |
2809 | as_fatal ("md_convert_frag"); | |
2810 | } | |
2811 | ||
2812 | /* Should never be called for c4x. */ | |
2813 | void | |
75d12d11 AM |
2814 | md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) |
2815 | char *ptr ATTRIBUTE_UNUSED; | |
2816 | addressT from_addr ATTRIBUTE_UNUSED; | |
2817 | addressT to_addr ATTRIBUTE_UNUSED; | |
2818 | fragS *frag ATTRIBUTE_UNUSED; | |
2819 | symbolS *to_symbol ATTRIBUTE_UNUSED; | |
026df7c5 NC |
2820 | { |
2821 | as_fatal ("md_create_short_jmp\n"); | |
2822 | } | |
2823 | ||
2824 | /* Should never be called for c4x. */ | |
2825 | void | |
75d12d11 AM |
2826 | md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) |
2827 | char *ptr ATTRIBUTE_UNUSED; | |
2828 | addressT from_addr ATTRIBUTE_UNUSED; | |
2829 | addressT to_addr ATTRIBUTE_UNUSED; | |
2830 | fragS *frag ATTRIBUTE_UNUSED; | |
2831 | symbolS *to_symbol ATTRIBUTE_UNUSED; | |
026df7c5 NC |
2832 | { |
2833 | as_fatal ("md_create_long_jump\n"); | |
2834 | } | |
2835 | ||
2836 | /* Should never be called for c4x. */ | |
2837 | int | |
75d12d11 AM |
2838 | md_estimate_size_before_relax (fragP, segtype) |
2839 | register fragS *fragP ATTRIBUTE_UNUSED; | |
2840 | segT segtype ATTRIBUTE_UNUSED; | |
026df7c5 NC |
2841 | { |
2842 | as_fatal ("md_estimate_size_before_relax\n"); | |
2843 | return 0; | |
2844 | } | |
2845 | ||
026df7c5 NC |
2846 | |
2847 | int | |
75d12d11 AM |
2848 | md_parse_option (c, arg) |
2849 | int c; | |
2850 | char *arg; | |
026df7c5 NC |
2851 | { |
2852 | switch (c) | |
2853 | { | |
9c87d6c7 | 2854 | case OPTION_CPU: /* cpu brand */ |
026df7c5 NC |
2855 | if (tolower (*arg) == 'c') |
2856 | arg++; | |
2857 | c4x_cpu = atoi (arg); | |
2858 | if (!IS_CPU_C3X (c4x_cpu) && !IS_CPU_C4X (c4x_cpu)) | |
9c87d6c7 | 2859 | as_warn ("Unsupported processor generation %d", c4x_cpu); |
026df7c5 | 2860 | break; |
9c87d6c7 SS |
2861 | |
2862 | case OPTION_REV: /* cpu revision */ | |
2863 | c4x_revision = atoi (arg); | |
2864 | break; | |
2865 | ||
2866 | case 'b': | |
2867 | as_warn ("Option -b is depreciated, please use -mbig"); | |
2868 | case OPTION_BIG: /* big model */ | |
2869 | c4x_big_model = 1; | |
2870 | break; | |
2871 | ||
2872 | case 'p': | |
2873 | as_warn ("Option -p is depreciated, please use -mmemparm"); | |
2874 | case OPTION_MEMPARM: /* push args */ | |
026df7c5 NC |
2875 | c4x_reg_args = 0; |
2876 | break; | |
9c87d6c7 SS |
2877 | |
2878 | case 'r': | |
2879 | as_warn ("Option -r is depreciated, please use -mregparm"); | |
2880 | case OPTION_REGPARM: /* register args */ | |
026df7c5 NC |
2881 | c4x_reg_args = 1; |
2882 | break; | |
9c87d6c7 SS |
2883 | |
2884 | case 's': | |
2885 | as_warn ("Option -s is depreciated, please use -msmall"); | |
2886 | case OPTION_SMALL: /* small model */ | |
026df7c5 NC |
2887 | c4x_big_model = 0; |
2888 | break; | |
9c87d6c7 SS |
2889 | |
2890 | case OPTION_IDLE2: | |
2891 | c4x_idle2 = 1; | |
2892 | break; | |
2893 | ||
2894 | case OPTION_LOWPOWER: | |
2895 | c4x_lowpower = 1; | |
2896 | break; | |
2897 | ||
2898 | case OPTION_ENHANCED: | |
2899 | c4x_enhanced = 1; | |
2900 | break; | |
2901 | ||
026df7c5 NC |
2902 | default: |
2903 | return 0; | |
2904 | } | |
2905 | ||
2906 | return 1; | |
2907 | } | |
2908 | ||
2909 | void | |
75d12d11 AM |
2910 | md_show_usage (stream) |
2911 | FILE *stream; | |
026df7c5 | 2912 | { |
9c87d6c7 SS |
2913 | fprintf (stream, |
2914 | _("\nTIC4X options:\n" | |
2915 | " -mcpu=CPU -mCPU select architecture variant. CPU can be:\n" | |
2916 | " 30 - TMS320C30\n" | |
2917 | " 31 - TMS320C31, TMS320LC31\n" | |
2918 | " 32 - TMS320C32\n" | |
2919 | " 33 - TMS320VC33\n" | |
2920 | " 40 - TMS320C40\n" | |
2921 | " 44 - TMS320C44\n" | |
2922 | " -mrev=REV set cpu hardware revision (integer numbers).\n" | |
2923 | " Combinations of -mcpu and -mrev will enable/disable\n" | |
2924 | " the appropriate options (-midle2, -mlowpower and\n" | |
2925 | " -menhanced) according to the selected type\n" | |
2926 | " -mbig select big memory model\n" | |
2927 | " -msmall select small memory model (default)\n" | |
2928 | " -mregparm select register parameters (default)\n" | |
2929 | " -mmemparm select memory parameters\n" | |
2930 | " -midle2 enable IDLE2 support\n" | |
2931 | " -mlowpower enable LOPOWER and MAXSPEED support\n" | |
2932 | " -menhanced enable enhanced opcode support\n")); | |
026df7c5 NC |
2933 | } |
2934 | ||
2935 | /* This is called when a line is unrecognized. This is used to handle | |
2936 | definitions of TI C3x tools style local labels $n where n is a single | |
2937 | decimal digit. */ | |
2938 | int | |
75d12d11 AM |
2939 | c4x_unrecognized_line (c) |
2940 | int c; | |
026df7c5 NC |
2941 | { |
2942 | int lab; | |
2943 | char *s; | |
2944 | ||
2945 | if (c != '$' || !isdigit (input_line_pointer[0])) | |
2946 | return 0; | |
2947 | ||
2948 | s = input_line_pointer; | |
2949 | ||
2950 | /* Let's allow multiple digit local labels. */ | |
2951 | lab = 0; | |
2952 | while (isdigit (*s)) | |
2953 | { | |
2954 | lab = lab * 10 + *s - '0'; | |
2955 | s++; | |
2956 | } | |
2957 | ||
2958 | if (dollar_label_defined (lab)) | |
2959 | { | |
2960 | as_bad ("Label \"$%d\" redefined", lab); | |
2961 | return 0; | |
2962 | } | |
2963 | ||
2964 | define_dollar_label (lab); | |
2965 | colon (dollar_label_name (lab, 0)); | |
2966 | input_line_pointer = s + 1; | |
2967 | ||
2968 | return 1; | |
2969 | } | |
2970 | ||
2971 | /* Handle local labels peculiar to us referred to in an expression. */ | |
2972 | symbolS * | |
75d12d11 AM |
2973 | md_undefined_symbol (name) |
2974 | char *name; | |
026df7c5 NC |
2975 | { |
2976 | /* Look for local labels of the form $n. */ | |
2977 | if (name[0] == '$' && isdigit (name[1])) | |
2978 | { | |
2979 | symbolS *symbolP; | |
2980 | char *s = name + 1; | |
2981 | int lab = 0; | |
2982 | ||
2983 | while (isdigit ((unsigned char) *s)) | |
2984 | { | |
2985 | lab = lab * 10 + *s - '0'; | |
2986 | s++; | |
2987 | } | |
2988 | if (dollar_label_defined (lab)) | |
2989 | { | |
2990 | name = dollar_label_name (lab, 0); | |
2991 | symbolP = symbol_find (name); | |
2992 | } | |
2993 | else | |
2994 | { | |
2995 | name = dollar_label_name (lab, 1); | |
2996 | symbolP = symbol_find_or_make (name); | |
2997 | } | |
2998 | ||
2999 | return symbolP; | |
3000 | } | |
3001 | return NULL; | |
3002 | } | |
3003 | ||
3004 | /* Parse an operand that is machine-specific. */ | |
3005 | void | |
75d12d11 AM |
3006 | md_operand (expressionP) |
3007 | expressionS *expressionP ATTRIBUTE_UNUSED; | |
026df7c5 NC |
3008 | { |
3009 | } | |
3010 | ||
3011 | /* Round up a section size to the appropriate boundary---do we need this? */ | |
3012 | valueT | |
75d12d11 AM |
3013 | md_section_align (segment, size) |
3014 | segT segment ATTRIBUTE_UNUSED; | |
3015 | valueT size; | |
026df7c5 NC |
3016 | { |
3017 | return size; /* Byte (i.e., 32-bit) alignment is fine? */ | |
3018 | } | |
3019 | ||
3020 | static int | |
75d12d11 AM |
3021 | c4x_pc_offset (op) |
3022 | unsigned int op; | |
026df7c5 NC |
3023 | { |
3024 | /* Determine the PC offset for a C[34]x instruction. | |
3025 | This could be simplified using some boolean algebra | |
3026 | but at the expense of readability. */ | |
3027 | switch (op >> 24) | |
3028 | { | |
3029 | case 0x60: /* br */ | |
3030 | case 0x62: /* call (C4x) */ | |
3031 | case 0x64: /* rptb (C4x) */ | |
3032 | return 1; | |
3033 | case 0x61: /* brd */ | |
3034 | case 0x63: /* laj */ | |
3035 | case 0x65: /* rptbd (C4x) */ | |
3036 | return 3; | |
3037 | case 0x66: /* swi */ | |
3038 | case 0x67: | |
3039 | return 0; | |
3040 | default: | |
3041 | break; | |
3042 | } | |
3043 | ||
3044 | switch ((op & 0xffe00000) >> 20) | |
3045 | { | |
3046 | case 0x6a0: /* bB */ | |
3047 | case 0x720: /* callB */ | |
3048 | case 0x740: /* trapB */ | |
3049 | return 1; | |
3050 | ||
3051 | case 0x6a2: /* bBd */ | |
3052 | case 0x6a6: /* bBat */ | |
3053 | case 0x6aa: /* bBaf */ | |
3054 | case 0x722: /* lajB */ | |
3055 | case 0x748: /* latB */ | |
3056 | case 0x798: /* rptbd */ | |
3057 | return 3; | |
3058 | ||
3059 | default: | |
3060 | break; | |
3061 | } | |
3062 | ||
3063 | switch ((op & 0xfe200000) >> 20) | |
3064 | { | |
3065 | case 0x6e0: /* dbB */ | |
3066 | return 1; | |
3067 | ||
3068 | case 0x6e2: /* dbBd */ | |
3069 | return 3; | |
3070 | ||
3071 | default: | |
3072 | break; | |
3073 | } | |
3074 | ||
3075 | return 0; | |
3076 | } | |
3077 | ||
3078 | /* Exactly what point is a PC-relative offset relative TO? | |
3079 | With the C3x we have the following: | |
3080 | DBcond, Bcond disp + PC + 1 => PC | |
3081 | DBcondD, BcondD disp + PC + 3 => PC | |
3082 | */ | |
3083 | long | |
75d12d11 AM |
3084 | md_pcrel_from (fixP) |
3085 | fixS *fixP; | |
026df7c5 NC |
3086 | { |
3087 | unsigned char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
3088 | unsigned int op; | |
3089 | ||
3090 | op = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; | |
3091 | ||
3092 | return ((fixP->fx_where + fixP->fx_frag->fr_address) >> 2) + | |
3093 | c4x_pc_offset (op); | |
3094 | } | |
3095 | ||
247b1fe6 SS |
3096 | /* Fill the alignment area with NOP's on .text, unless fill-data |
3097 | was specified. */ | |
026df7c5 | 3098 | int |
75d12d11 AM |
3099 | c4x_do_align (alignment, fill, len, max) |
3100 | int alignment ATTRIBUTE_UNUSED; | |
3101 | const char *fill ATTRIBUTE_UNUSED; | |
3102 | int len ATTRIBUTE_UNUSED; | |
3103 | int max ATTRIBUTE_UNUSED; | |
026df7c5 | 3104 | { |
247b1fe6 | 3105 | unsigned long nop = NOP_OPCODE; |
026df7c5 | 3106 | |
247b1fe6 SS |
3107 | /* Because we are talking lwords, not bytes, adjust aligment to do words */ |
3108 | alignment += 2; | |
3109 | ||
3110 | if (alignment != 0 && !need_pass_2) | |
3111 | { | |
3112 | if (fill == NULL) | |
3113 | { | |
3114 | /*if (subseg_text_p (now_seg))*/ /* FIXME: doesnt work for .text for some reason */ | |
3115 | frag_align_pattern( alignment, (const char *)&nop, sizeof(nop), max); | |
3116 | return 1; | |
3117 | /*else | |
3118 | frag_align (alignment, 0, max);*/ | |
3119 | } | |
3120 | else if (len <= 1) | |
3121 | frag_align (alignment, *fill, max); | |
3122 | else | |
3123 | frag_align_pattern (alignment, fill, len, max); | |
3124 | } | |
3125 | ||
3126 | /* Return 1 to skip the default aligment function */ | |
026df7c5 NC |
3127 | return 1; |
3128 | } | |
3129 | ||
3130 | /* Look for and remove parallel instruction operator ||. */ | |
3131 | void | |
75d12d11 | 3132 | c4x_start_line () |
026df7c5 NC |
3133 | { |
3134 | char *s = input_line_pointer; | |
3135 | ||
3136 | SKIP_WHITESPACE (); | |
3137 | ||
3138 | /* If parallel instruction prefix found at start of line, skip it. */ | |
3139 | if (*input_line_pointer == '|' && input_line_pointer[1] == '|') | |
3140 | { | |
3141 | if (insn->in_use) | |
3142 | { | |
3143 | insn->parallel = 1; | |
3144 | input_line_pointer += 2; | |
3145 | /* So line counters get bumped. */ | |
3146 | input_line_pointer[-1] = '\n'; | |
3147 | } | |
3148 | } | |
3149 | else | |
3150 | { | |
3151 | if (insn->in_use) | |
3152 | md_assemble (NULL); | |
3153 | input_line_pointer = s; | |
3154 | } | |
3155 | } | |
3156 | ||
3157 | arelent * | |
75d12d11 AM |
3158 | tc_gen_reloc (seg, fixP) |
3159 | asection *seg ATTRIBUTE_UNUSED; | |
3160 | fixS *fixP; | |
026df7c5 NC |
3161 | { |
3162 | arelent *reloc; | |
3163 | ||
3164 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
3165 | ||
3166 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
3167 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); | |
3168 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
3169 | reloc->address /= OCTETS_PER_BYTE; | |
3170 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
3171 | if (reloc->howto == (reloc_howto_type *) NULL) | |
3172 | { | |
3173 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
9c87d6c7 | 3174 | "Reloc %d not supported by object file format", |
026df7c5 NC |
3175 | (int) fixP->fx_r_type); |
3176 | return NULL; | |
3177 | } | |
3178 | ||
3179 | if (fixP->fx_r_type == BFD_RELOC_HI16) | |
3180 | reloc->addend = fixP->fx_offset; | |
3181 | else | |
3182 | reloc->addend = fixP->fx_addnumber; | |
3183 | ||
3184 | return reloc; | |
3185 | } |