1 /* Definitions of target machine for GNU compiler, Lattice Mico32 architecture.
2 Contributed by Jon Beniston <jon@beniston.com>
4 Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 3, or (at your
11 option) any later version.
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /*-------------------------------*/
23 /* Run-time Target Specification */
24 /*-------------------------------*/
26 /* Target CPU builtins. */
27 #define TARGET_CPU_CPP_BUILTINS() \
30 builtin_define ("__lm32__"); \
31 builtin_assert ("cpu=lm32"); \
32 builtin_assert ("machine=lm32"); \
33 if (TARGET_MULTIPLY_ENABLED) \
34 builtin_define ("__multiply_enabled__"); \
35 if (TARGET_DIVIDE_ENABLED) \
36 builtin_define ("__divide_enabled__"); \
37 if (TARGET_BARREL_SHIFT_ENABLED) \
38 builtin_define ("__barrel_shift_enabled__"); \
39 if (TARGET_SIGN_EXTEND_ENABLED) \
40 builtin_define ("__sign_extend_enabled__"); \
41 if (TARGET_USER_ENABLED) \
42 builtin_define ("__user_enabled__"); \
48 %{mmultiply-enabled} \
50 %{mbarrel-shift-enabled} \
51 %{msign-extend-enabled} \
55 /* Let link script define all link options.
56 Default to using simulator link script. */
59 #define STARTFILE_SPEC ""
61 #define ENDFILE_SPEC ""
63 #define LIB_SPEC "%{!T*:-T sim.ld}"
66 #define CC1_SPEC "%{G*}"
68 /*---------------------------------*/
69 /* Target machine storage layout. */
70 /*---------------------------------*/
72 #define BITS_BIG_ENDIAN 0
73 #define BYTES_BIG_ENDIAN 1
74 #define WORDS_BIG_ENDIAN 1
76 #define BITS_PER_UNIT 8
77 #define BITS_PER_WORD 32
78 #define UNITS_PER_WORD 4
80 #define POINTER_SIZE 32
82 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
84 if (GET_MODE_CLASS (MODE) == MODE_INT \
85 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
89 #define PARM_BOUNDARY 32
91 #define STACK_BOUNDARY 32
93 #define BIGGEST_ALIGNMENT 64
95 #define FUNCTION_BOUNDARY 32
97 #define EMPTY_FIELD_BOUNDARY 32
99 #define STRICT_ALIGNMENT 1
101 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
103 /* Make strings word-aligned so strcpy from constants will be faster. */
104 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
105 (TREE_CODE (EXP) == STRING_CST \
106 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
108 /* Make arrays and structures word-aligned to allow faster copying etc. */
109 #define DATA_ALIGNMENT(TYPE, ALIGN) \
110 ((((ALIGN) < BITS_PER_WORD) \
111 && (TREE_CODE (TYPE) == ARRAY_TYPE \
112 || TREE_CODE (TYPE) == UNION_TYPE \
113 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
115 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause
116 character arrays to be word-aligned so that `strcpy' calls that copy
117 constants to character arrays can be done inline, and 'strcmp' can be
118 optimised to use word loads. */
119 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
120 DATA_ALIGNMENT (TYPE, ALIGN)
122 /*----------------------------------------*/
123 /* Layout of source language data types. */
124 /*----------------------------------------*/
126 #define INT_TYPE_SIZE 32
127 #define SHORT_TYPE_SIZE 16
128 #define LONG_TYPE_SIZE 32
129 #define LONG_LONG_TYPE_SIZE 64
131 #define FLOAT_TYPE_SIZE 32
132 #define DOUBLE_TYPE_SIZE 64
133 #define LONG_DOUBLE_TYPE_SIZE 64
135 #define DEFAULT_SIGNED_CHAR 0
137 #define SIZE_TYPE "unsigned int"
139 #define PTRDIFF_TYPE "int"
141 /*---------------------------*/
142 /* Standard register usage. */
143 /*---------------------------*/
145 #define FIRST_PSEUDO_REGISTER 32
153 #define G_REG_P(X) ((X)<32)
155 #define FIXED_REGISTERS \
156 { 1, 0, 0, 0, 0, 0, 0, 0, \
157 0, 0, 0, 0, 0, 0, 0, 0, \
158 0, 0, 0, 0, 0, 0, 0, 0, \
159 0, 0, 1, 0, 1, 0, 1, 1}
161 #define CALL_USED_REGISTERS \
162 { 1, 1, 1, 1, 1, 1, 1, 1, \
163 1, 1, 1, 0, 0, 0, 0, 0, \
164 0, 0, 0, 0, 0, 0, 0, 0, \
165 0, 0, 1, 0, 1, 0, 1, 1}
167 #define HARD_REGNO_NREGS(REGNO, MODE) \
168 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
170 #define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO)
172 #define MODES_TIEABLE_P(MODE1, MODE2) \
173 ( GET_MODE_CLASS (MODE1) == MODE_INT \
174 && GET_MODE_CLASS (MODE2) == MODE_INT \
175 && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \
176 && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD)
178 #define AVOID_CCMODE_COPIES
180 /*----------------------------------*/
181 /* Register classes and constants. */
182 /*----------------------------------*/
192 #define N_REG_CLASSES (int) LIM_REG_CLASSES
194 #define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" }
196 #define REG_CLASS_CONTENTS \
202 #define REGNO_REG_CLASS(REGNO) \
203 (G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS)
205 #define CLASS_MAX_NREGS(CLASS, MODE) \
206 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
208 #define INDEX_REG_CLASS NO_REGS
210 #define BASE_REG_CLASS GENERAL_REGS
212 #define REGNO_OK_FOR_BASE_P(REGNO) \
213 (G_REG_P (REGNO) || G_REG_P ((unsigned) reg_renumber[REGNO]))
215 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
217 /*----------------------------------------*/
218 /* Stack Layout and Calling Conventions. */
219 /*----------------------------------------*/
221 #define STACK_GROWS_DOWNWARD 1
223 #define FRAME_GROWS_DOWNWARD 1
225 #define STACK_POINTER_OFFSET (UNITS_PER_WORD)
227 #define STARTING_FRAME_OFFSET (UNITS_PER_WORD)
229 #define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD)
231 #define STACK_POINTER_REGNUM SP_REGNUM
233 #define FRAME_POINTER_REGNUM FP_REGNUM
235 #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM
237 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RA_REGNUM)
239 #define RETURN_ADDR_RTX(count, frame) \
240 lm32_return_addr_rtx (count, frame)
242 /* FIXME - This is not yet supported. */
243 #define STATIC_CHAIN_REGNUM 9
245 #define ELIMINABLE_REGS \
246 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
247 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
250 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
251 (OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO)
253 /*-----------------------------*/
254 /* Function argument passing. */
255 /*-----------------------------*/
257 #define ACCUMULATE_OUTGOING_ARGS 1
259 /*--------------------------------*/
260 /* Passing Arguments in Registers */
261 /*--------------------------------*/
263 /* The first argument register. */
264 #define LM32_FIRST_ARG_REG 1
266 /* The number of (integer) argument register available. */
267 #define LM32_NUM_ARG_REGS 8
269 #define CUMULATIVE_ARGS int
271 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \
274 #define FUNCTION_ARG_REGNO_P(r) \
275 (((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS))
277 /*--------------------*/
278 /* Function results. */
279 /*--------------------*/
281 #define FUNCTION_VALUE(VALTYPE, FUNC) \
282 gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \
283 && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \
285 : TYPE_MODE (VALTYPE), \
288 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM)
290 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM)
292 #define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE)
294 #define DEFAULT_PCC_STRUCT_RETURN 0
296 /* Convert from bytes to ints. */
297 #define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
299 /* The number of (integer) registers required to hold a quantity of
301 #define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE))
303 /* The number of (integer) registers required to hold a quantity of
305 #define LM32_NUM_REGS2(MODE, TYPE) \
306 LM32_NUM_INTS ((MODE) == BLKmode ? \
307 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
309 #define STRUCT_VALUE 0
311 /*---------------------------*/
312 /* Function entry and exit. */
313 /*---------------------------*/
319 #define FUNCTION_PROFILER(FILE, LABELNO)
325 #define TRAMPOLINE_SIZE 0
327 /*---------------------*/
328 /* Addressing Modes. */
329 /*---------------------*/
331 #define CONSTANT_ADDRESS_P(X) \
332 ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
333 || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH \
334 || (GET_CODE (X) == CONST)))
336 #define MAX_REGS_PER_ADDRESS 1
338 #define STRICT_REG_OK_FOR_BASE_P(X) \
339 (REGNO_OK_FOR_BASE_P (REGNO (X)))
340 #define NONSTRICT_REG_OK_FOR_BASE_P(X) \
341 (G_REG_P (REGNO (X)) || !HARD_REGISTER_NUM_P (REGNO (X)))
344 #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P(X)
346 #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P(X)
349 /*-------------------------*/
350 /* Condition Code Status. */
351 /*-------------------------*/
353 #define REVERSIBLE_CC_MODE(MODE) 1
359 #define SLOW_BYTE_ACCESS 1
361 #define NO_FUNCTION_CSE
363 #define BRANCH_COST(speed_p, predictable_p) 4
365 #define MOVE_RATIO(speed) (speed ? 24 : 3)
371 #define TEXT_SECTION_ASM_OP "\t.section\t.text"
372 #define DATA_SECTION_ASM_OP "\t.section\t.data"
373 #define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\""
374 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
375 #define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\""
381 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM)
383 #define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
385 #define LEGITIMATE_PIC_OPERAND_P(X) \
386 (!(nonpic_symbol_mentioned_p (X)))
392 #define ASM_COMMENT_START "#"
394 #define ASM_APP_ON "#APP\n"
396 #define ASM_APP_OFF "#NO_APP\n"
398 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
400 fputc ( '\t', FILE); \
401 assemble_name (FILE, LABEL1); \
402 fputs ( " = ", FILE); \
403 assemble_name (FILE, LABEL2); \
404 fputc ( '\n', FILE); \
407 /* Override default implementation in elfos.h to support -G. */
408 #undef ASM_OUTPUT_ALIGNED_LOCAL
409 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
411 if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \
412 switch_to_section (sbss_section); \
414 switch_to_section (bss_section); \
415 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
416 if (!flag_inhibit_size_directive) \
417 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \
418 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \
419 ASM_OUTPUT_LABEL(FILE, NAME); \
420 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \
423 /* Override default implementation in elfos.h to support -G. */
424 #undef ASM_OUTPUT_ALIGNED_COMMON
425 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
428 if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \
430 switch_to_section (sbss_section); \
431 (*targetm.asm_out.globalize_label) (FILE, NAME); \
432 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
433 if (!flag_inhibit_size_directive) \
434 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \
435 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \
436 ASM_OUTPUT_LABEL(FILE, NAME); \
437 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \
441 switch_to_section (bss_section); \
442 fprintf ((FILE), "%s", COMMON_ASM_OP); \
443 assemble_name ((FILE), (NAME)); \
444 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
445 (SIZE), (ALIGN) / BITS_PER_UNIT); \
450 #define ASM_OUTPUT_LABEL(FILE, NAME) \
451 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
453 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
455 const char *xname = (NAME); \
456 if (xname[0] == '@') \
458 if (xname[0] == '*') \
460 fputs (xname, FILE); \
463 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \
465 assemble_name (STREAM, XSTR (SYMBOL, 0)); \
468 #define GLOBAL_ASM_OP "\t.global\t"
470 #define REGISTER_NAMES \
472 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
473 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
474 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
475 "r24", "r25", "gp", "fp", "sp", "ra", "ea", "ba"}
477 #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
478 (((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*'))
480 #define PRINT_OPERAND(FILE, X, CODE) \
481 lm32_print_operand (FILE, X, CODE)
483 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
484 lm32_print_operand_address (FILE, ADDR)
486 #ifndef LOCAL_LABEL_PREFIX
487 #define LOCAL_LABEL_PREFIX "."
490 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
491 do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0)
493 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
496 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \
497 fprintf (FILE, "\n\t.word\t"); \
498 assemble_name (FILE, label); \
499 fprintf (FILE, "\n"); \
502 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
505 fprintf (FILE, "\t.word\t("); \
506 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \
507 assemble_name (FILE, label); \
508 fprintf (FILE, "-"); \
509 ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \
510 assemble_name (FILE, label); \
511 fprintf (FILE, ")\n"); \
518 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
520 #define DEFAULT_GDB_EXTENSIONS 1
526 #define CASE_VECTOR_MODE Pmode
528 #define WORD_REGISTER_OPERATIONS
530 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
532 #define SHORT_IMMEDIATES_SIGN_EXTEND
534 #define MOVE_MAX UNITS_PER_WORD
535 #define MAX_MOVE_MAX 4
537 #define SHIFT_COUNT_TRUNCATED 1
539 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
543 #define FUNCTION_MODE SImode
545 #ifndef NO_IMPLICIT_EXTERN_C
546 #define NO_IMPLICIT_EXTERN_C
549 #define STORE_FLAG_VALUE 1