Mercurial > hg > CbC > CbC_gcc
comparison gcc/config/h8300/h8300.h @ 0:a06113de4d67
first commit
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
---|---|
date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children | 77e2b8dfacca |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a06113de4d67 |
---|---|
1 /* Definitions of target machine for GNU compiler. | |
2 Renesas H8/300 (generic) | |
3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1996, 1997, 1998, 1999, | |
4 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 | |
5 Free Software Foundation, Inc. | |
6 Contributed by Steve Chamberlain (sac@cygnus.com), | |
7 Jim Wilson (wilson@cygnus.com), and Doug Evans (dje@cygnus.com). | |
8 | |
9 This file is part of GCC. | |
10 | |
11 GCC is free software; you can redistribute it and/or modify | |
12 it under the terms of the GNU General Public License as published by | |
13 the Free Software Foundation; either version 3, or (at your option) | |
14 any later version. | |
15 | |
16 GCC is distributed in the hope that it will be useful, | |
17 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 GNU General Public License for more details. | |
20 | |
21 You should have received a copy of the GNU General Public License | |
22 along with GCC; see the file COPYING3. If not see | |
23 <http://www.gnu.org/licenses/>. */ | |
24 | |
25 #ifndef GCC_H8300_H | |
26 #define GCC_H8300_H | |
27 | |
28 /* Which CPU to compile for. | |
29 We use int for CPU_TYPE to avoid lots of casts. */ | |
30 #if 0 /* defined in insn-attr.h, here for documentation */ | |
31 enum attr_cpu { CPU_H8300, CPU_H8300H }; | |
32 #endif | |
33 extern int cpu_type; | |
34 | |
35 /* Various globals defined in h8300.c. */ | |
36 | |
37 extern const char *h8_push_op, *h8_pop_op, *h8_mov_op; | |
38 extern const char * const *h8_reg_names; | |
39 | |
40 /* Target CPU builtins. */ | |
41 #define TARGET_CPU_CPP_BUILTINS() \ | |
42 do \ | |
43 { \ | |
44 if (TARGET_H8300H) \ | |
45 { \ | |
46 builtin_define ("__H8300H__"); \ | |
47 builtin_assert ("cpu=h8300h"); \ | |
48 builtin_assert ("machine=h8300h"); \ | |
49 if (TARGET_NORMAL_MODE) \ | |
50 { \ | |
51 builtin_define ("__NORMAL_MODE__"); \ | |
52 } \ | |
53 } \ | |
54 else if (TARGET_H8300SX) \ | |
55 { \ | |
56 builtin_define ("__H8300SX__"); \ | |
57 if (TARGET_NORMAL_MODE) \ | |
58 { \ | |
59 builtin_define ("__NORMAL_MODE__"); \ | |
60 } \ | |
61 } \ | |
62 else if (TARGET_H8300S) \ | |
63 { \ | |
64 builtin_define ("__H8300S__"); \ | |
65 builtin_assert ("cpu=h8300s"); \ | |
66 builtin_assert ("machine=h8300s"); \ | |
67 if (TARGET_NORMAL_MODE) \ | |
68 { \ | |
69 builtin_define ("__NORMAL_MODE__"); \ | |
70 } \ | |
71 } \ | |
72 else \ | |
73 { \ | |
74 builtin_define ("__H8300__"); \ | |
75 builtin_assert ("cpu=h8300"); \ | |
76 builtin_assert ("machine=h8300"); \ | |
77 } \ | |
78 } \ | |
79 while (0) | |
80 | |
81 #define LINK_SPEC "%{mh:%{mn:-m h8300hn}} %{mh:%{!mn:-m h8300h}} %{ms:%{mn:-m h8300sn}} %{ms:%{!mn:-m h8300s}}" | |
82 | |
83 #define LIB_SPEC "%{mrelax:-relax} %{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}" | |
84 | |
85 #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \ | |
86 do \ | |
87 { \ | |
88 /* Basic block reordering is only beneficial on targets with cache \ | |
89 and/or variable-cycle branches where (cycle count taken != \ | |
90 cycle count not taken). */ \ | |
91 flag_reorder_blocks = 0; \ | |
92 } \ | |
93 while (0) | |
94 | |
95 /* Print subsidiary information on the compiler version in use. */ | |
96 | |
97 #define TARGET_VERSION fprintf (stderr, " (Renesas H8/300)"); | |
98 | |
99 /* Macros used in the machine description to test the flags. */ | |
100 | |
101 /* Select between the H8/300 and H8/300H CPUs. */ | |
102 #define TARGET_H8300 (! TARGET_H8300H && ! TARGET_H8300S) | |
103 #define TARGET_H8300S (TARGET_H8300S_1 || TARGET_H8300SX) | |
104 /* Some multiply instructions are not available in all H8SX variants. | |
105 Use this macro instead of TARGET_H8300SX to indicate this, even | |
106 though we don't actually generate different code for now. */ | |
107 #define TARGET_H8300SXMUL TARGET_H8300SX | |
108 | |
109 #ifdef IN_LIBGCC2 | |
110 #undef TARGET_H8300H | |
111 #undef TARGET_H8300S | |
112 #undef TARGET_NORMAL_MODE | |
113 /* If compiling libgcc2, make these compile time constants based on what | |
114 flags are we actually compiling with. */ | |
115 #ifdef __H8300H__ | |
116 #define TARGET_H8300H 1 | |
117 #else | |
118 #define TARGET_H8300H 0 | |
119 #endif | |
120 #ifdef __H8300S__ | |
121 #define TARGET_H8300S 1 | |
122 #else | |
123 #define TARGET_H8300S 0 | |
124 #endif | |
125 #ifdef __NORMAL_MODE__ | |
126 #define TARGET_NORMAL_MODE 1 | |
127 #else | |
128 #define TARGET_NORMAL_MODE 0 | |
129 #endif | |
130 #endif /* !IN_LIBGCC2 */ | |
131 | |
132 /* Do things that must be done once at start up. */ | |
133 | |
134 #define OVERRIDE_OPTIONS \ | |
135 do \ | |
136 { \ | |
137 h8300_init_once (); \ | |
138 } \ | |
139 while (0) | |
140 | |
141 /* Default target_flags if no switches specified. */ | |
142 | |
143 #ifndef TARGET_DEFAULT | |
144 #define TARGET_DEFAULT (MASK_QUICKCALL) | |
145 #endif | |
146 | |
147 /* Show we can debug even without a frame pointer. */ | |
148 /* #define CAN_DEBUG_WITHOUT_FP */ | |
149 | |
150 /* Define this if addresses of constant functions | |
151 shouldn't be put through pseudo regs where they can be cse'd. | |
152 Desirable on machines where ordinary constants are expensive | |
153 but a CALL with constant address is cheap. | |
154 | |
155 Calls through a register are cheaper than calls to named | |
156 functions; however, the register pressure this causes makes | |
157 CSEing of function addresses generally a lose. */ | |
158 #define NO_FUNCTION_CSE | |
159 | |
160 /* Target machine storage layout */ | |
161 | |
162 /* Define this if most significant bit is lowest numbered | |
163 in instructions that operate on numbered bit-fields. | |
164 This is not true on the H8/300. */ | |
165 #define BITS_BIG_ENDIAN 0 | |
166 | |
167 /* Define this if most significant byte of a word is the lowest numbered. */ | |
168 /* That is true on the H8/300. */ | |
169 #define BYTES_BIG_ENDIAN 1 | |
170 | |
171 /* Define this if most significant word of a multiword number is lowest | |
172 numbered. */ | |
173 #define WORDS_BIG_ENDIAN 1 | |
174 | |
175 #define MAX_BITS_PER_WORD 32 | |
176 | |
177 /* Width of a word, in units (bytes). */ | |
178 #define UNITS_PER_WORD (TARGET_H8300H || TARGET_H8300S ? 4 : 2) | |
179 #define MIN_UNITS_PER_WORD 2 | |
180 | |
181 #define SHORT_TYPE_SIZE 16 | |
182 #define INT_TYPE_SIZE (TARGET_INT32 ? 32 : 16) | |
183 #define LONG_TYPE_SIZE 32 | |
184 #define LONG_LONG_TYPE_SIZE 64 | |
185 #define FLOAT_TYPE_SIZE 32 | |
186 #define DOUBLE_TYPE_SIZE 32 | |
187 #define LONG_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE | |
188 | |
189 #define MAX_FIXED_MODE_SIZE 32 | |
190 | |
191 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
192 #define PARM_BOUNDARY (TARGET_H8300H || TARGET_H8300S ? 32 : 16) | |
193 | |
194 /* Allocation boundary (in *bits*) for the code of a function. */ | |
195 #define FUNCTION_BOUNDARY 16 | |
196 | |
197 /* Alignment of field after `int : 0' in a structure. */ | |
198 /* One can argue this should be 32 for -mint32, but since 32-bit ints only | |
199 need 16-bit alignment, this is left as is so that -mint32 doesn't change | |
200 structure layouts. */ | |
201 #define EMPTY_FIELD_BOUNDARY 16 | |
202 | |
203 /* No data type wants to be aligned rounder than this. | |
204 32-bit values are aligned as such on the H8/300H and H8S for speed. */ | |
205 #define BIGGEST_ALIGNMENT \ | |
206 (((TARGET_H8300H || TARGET_H8300S) && ! TARGET_ALIGN_300) ? 32 : 16) | |
207 | |
208 /* The stack goes in 16/32 bit lumps. */ | |
209 #define STACK_BOUNDARY (TARGET_H8300 ? 16 : 32) | |
210 | |
211 /* Define this if move instructions will actually fail to work | |
212 when given unaligned data. */ | |
213 /* On the H8/300, longs can be aligned on halfword boundaries, but not | |
214 byte boundaries. */ | |
215 #define STRICT_ALIGNMENT 1 | |
216 | |
217 /* Standard register usage. */ | |
218 | |
219 /* Number of actual hardware registers. | |
220 The hardware registers are assigned numbers for the compiler | |
221 from 0 to just below FIRST_PSEUDO_REGISTER. | |
222 | |
223 All registers that the compiler knows about must be given numbers, | |
224 even those that are not normally considered general registers. | |
225 | |
226 Reg 9 does not correspond to any hardware register, but instead | |
227 appears in the RTL as an argument pointer prior to reload, and is | |
228 eliminated during reloading in favor of either the stack or frame | |
229 pointer. */ | |
230 | |
231 #define FIRST_PSEUDO_REGISTER 12 | |
232 | |
233 /* 1 for registers that have pervasive standard uses | |
234 and are not available for the register allocator. */ | |
235 | |
236 #define FIXED_REGISTERS \ | |
237 /* r0 r1 r2 r3 r4 r5 r6 r7 mac ap rap fp */ \ | |
238 { 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1 } | |
239 | |
240 /* 1 for registers not available across function calls. | |
241 These must include the FIXED_REGISTERS and also any | |
242 registers that can be used without being saved. | |
243 The latter must include the registers where values are returned | |
244 and the register where structure-value addresses are passed. | |
245 Aside from that, you can include as many other registers as you | |
246 like. | |
247 | |
248 H8 destroys r0,r1,r2,r3. */ | |
249 | |
250 #define CALL_USED_REGISTERS \ | |
251 /* r0 r1 r2 r3 r4 r5 r6 r7 mac ap rap fp */ \ | |
252 { 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1 } | |
253 | |
254 #define REG_ALLOC_ORDER \ | |
255 /* r0 r1 r2 r3 r4 r5 r6 r7 mac ap rap fp */ \ | |
256 { 2, 3, 0, 1, 4, 5, 6, 8, 7, 9, 10, 11 } | |
257 | |
258 #define CONDITIONAL_REGISTER_USAGE \ | |
259 { \ | |
260 if (!TARGET_MAC) \ | |
261 fixed_regs[MAC_REG] = call_used_regs[MAC_REG] = 1; \ | |
262 } | |
263 | |
264 #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
265 h8300_hard_regno_nregs ((REGNO), (MODE)) | |
266 | |
267 #define HARD_REGNO_MODE_OK(REGNO, MODE) \ | |
268 h8300_hard_regno_mode_ok ((REGNO), (MODE)) | |
269 | |
270 /* Value is 1 if it is a good idea to tie two pseudo registers | |
271 when one has mode MODE1 and one has mode MODE2. | |
272 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, | |
273 for any hard reg, then this must be 0 for correct output. */ | |
274 #define MODES_TIEABLE_P(MODE1, MODE2) \ | |
275 ((MODE1) == (MODE2) \ | |
276 || (((MODE1) == QImode || (MODE1) == HImode \ | |
277 || ((TARGET_H8300H || TARGET_H8300S) && (MODE1) == SImode)) \ | |
278 && ((MODE2) == QImode || (MODE2) == HImode \ | |
279 || ((TARGET_H8300H || TARGET_H8300S) && (MODE2) == SImode)))) | |
280 | |
281 /* A C expression that is nonzero if hard register NEW_REG can be | |
282 considered for use as a rename register for OLD_REG register */ | |
283 | |
284 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \ | |
285 h8300_hard_regno_rename_ok (OLD_REG, NEW_REG) | |
286 | |
287 /* Specify the registers used for certain standard purposes. | |
288 The values of these macros are register numbers. */ | |
289 | |
290 /* H8/300 pc is not overloaded on a register. */ | |
291 | |
292 /*#define PC_REGNUM 15*/ | |
293 | |
294 /* Register to use for pushing function arguments. */ | |
295 #define STACK_POINTER_REGNUM SP_REG | |
296 | |
297 /* Base register for access to local variables of the function. */ | |
298 #define HARD_FRAME_POINTER_REGNUM HFP_REG | |
299 | |
300 /* Base register for access to local variables of the function. */ | |
301 #define FRAME_POINTER_REGNUM FP_REG | |
302 | |
303 /* Value should be nonzero if functions must have frame pointers. | |
304 Zero means the frame pointer need not be set up (and parms | |
305 may be accessed via the stack pointer) in functions that seem suitable. | |
306 This is computed in `reload', in reload1.c. */ | |
307 #define FRAME_POINTER_REQUIRED 0 | |
308 | |
309 /* Base register for access to arguments of the function. */ | |
310 #define ARG_POINTER_REGNUM AP_REG | |
311 | |
312 /* Register in which static-chain is passed to a function. */ | |
313 #define STATIC_CHAIN_REGNUM SC_REG | |
314 | |
315 /* Fake register that holds the address on the stack of the | |
316 current function's return address. */ | |
317 #define RETURN_ADDRESS_POINTER_REGNUM RAP_REG | |
318 | |
319 /* A C expression whose value is RTL representing the value of the return | |
320 address for the frame COUNT steps up from the current frame. | |
321 FRAMEADDR is already the frame pointer of the COUNT frame, assuming | |
322 a stack layout with the frame pointer as the first saved register. */ | |
323 #define RETURN_ADDR_RTX(COUNT, FRAME) h8300_return_addr_rtx ((COUNT), (FRAME)) | |
324 | |
325 /* Define the classes of registers for register constraints in the | |
326 machine description. Also define ranges of constants. | |
327 | |
328 One of the classes must always be named ALL_REGS and include all hard regs. | |
329 If there is more than one class, another class must be named NO_REGS | |
330 and contain no registers. | |
331 | |
332 The name GENERAL_REGS must be the name of a class (or an alias for | |
333 another name such as ALL_REGS). This is the class of registers | |
334 that is allowed by "g" or "r" in a register constraint. | |
335 Also, registers outside this class are allocated only when | |
336 instructions express preferences for them. | |
337 | |
338 The classes must be numbered in nondecreasing order; that is, | |
339 a larger-numbered class must never be contained completely | |
340 in a smaller-numbered class. | |
341 | |
342 For any two classes, it is very desirable that there be another | |
343 class that represents their union. */ | |
344 | |
345 enum reg_class { | |
346 NO_REGS, COUNTER_REGS, SOURCE_REGS, DESTINATION_REGS, | |
347 GENERAL_REGS, MAC_REGS, ALL_REGS, LIM_REG_CLASSES | |
348 }; | |
349 | |
350 #define N_REG_CLASSES ((int) LIM_REG_CLASSES) | |
351 | |
352 /* Give names of register classes as strings for dump file. */ | |
353 | |
354 #define REG_CLASS_NAMES \ | |
355 { "NO_REGS", "COUNTER_REGS", "SOURCE_REGS", "DESTINATION_REGS", \ | |
356 "GENERAL_REGS", "MAC_REGS", "ALL_REGS", "LIM_REGS" } | |
357 | |
358 /* The following macro defines cover classes for Integrated Register | |
359 Allocator. Cover classes is a set of non-intersected register | |
360 classes covering all hard registers used for register allocation | |
361 purpose. Any move between two registers of a cover class should be | |
362 cheaper than load or store of the registers. The macro value is | |
363 array of register classes with LIM_REG_CLASSES used as the end | |
364 marker. */ | |
365 | |
366 #define IRA_COVER_CLASSES \ | |
367 { \ | |
368 GENERAL_REGS, MAC_REGS, LIM_REG_CLASSES \ | |
369 } | |
370 | |
371 /* Define which registers fit in which classes. | |
372 This is an initializer for a vector of HARD_REG_SET | |
373 of length N_REG_CLASSES. */ | |
374 | |
375 #define REG_CLASS_CONTENTS \ | |
376 { {0}, /* No regs */ \ | |
377 {0x010}, /* COUNTER_REGS */ \ | |
378 {0x020}, /* SOURCE_REGS */ \ | |
379 {0x040}, /* DESTINATION_REGS */ \ | |
380 {0xeff}, /* GENERAL_REGS */ \ | |
381 {0x100}, /* MAC_REGS */ \ | |
382 {0xfff}, /* ALL_REGS */ \ | |
383 } | |
384 | |
385 /* The same information, inverted: | |
386 Return the class number of the smallest class containing | |
387 reg number REGNO. This could be a conditional expression | |
388 or could index an array. */ | |
389 | |
390 #define REGNO_REG_CLASS(REGNO) \ | |
391 ((REGNO) == MAC_REG ? MAC_REGS \ | |
392 : (REGNO) == COUNTER_REG ? COUNTER_REGS \ | |
393 : (REGNO) == SOURCE_REG ? SOURCE_REGS \ | |
394 : (REGNO) == DESTINATION_REG ? DESTINATION_REGS \ | |
395 : GENERAL_REGS) | |
396 | |
397 /* The class value for index registers, and the one for base regs. */ | |
398 | |
399 #define INDEX_REG_CLASS (TARGET_H8300SX ? GENERAL_REGS : NO_REGS) | |
400 #define BASE_REG_CLASS GENERAL_REGS | |
401 | |
402 /* Get reg_class from a letter such as appears in the machine description. | |
403 | |
404 'a' is the MAC register. */ | |
405 | |
406 #define REG_CLASS_FROM_LETTER(C) (h8300_reg_class_from_letter (C)) | |
407 | |
408 /* The letters I, J, K, L, M, N, O, P in a register constraint string | |
409 can be used to stand for particular ranges of immediate operands. | |
410 This macro defines what the ranges are. | |
411 C is the letter, and VALUE is a constant value. | |
412 Return 1 if VALUE is in the range specified by C. */ | |
413 | |
414 #define CONST_OK_FOR_I(VALUE) ((VALUE) == 0) | |
415 #define CONST_OK_FOR_J(VALUE) (((VALUE) & 0xff) == 0) | |
416 #define CONST_OK_FOR_L(VALUE) \ | |
417 (TARGET_H8300H || TARGET_H8300S \ | |
418 ? (VALUE) == 1 || (VALUE) == 2 || (VALUE) == 4 \ | |
419 : (VALUE) == 1 || (VALUE) == 2) | |
420 #define CONST_OK_FOR_M(VALUE) \ | |
421 ((VALUE) == 1 || (VALUE) == 2) | |
422 #define CONST_OK_FOR_N(VALUE) \ | |
423 (TARGET_H8300H || TARGET_H8300S \ | |
424 ? (VALUE) == -1 || (VALUE) == -2 || (VALUE) == -4 \ | |
425 : (VALUE) == -1 || (VALUE) == -2) | |
426 #define CONST_OK_FOR_O(VALUE) \ | |
427 ((VALUE) == -1 || (VALUE) == -2) | |
428 | |
429 /* Multi-letter constraints for constant are always started with P | |
430 (just because it was the only letter in the range left. New | |
431 constraints for constants should be added here. */ | |
432 #define CONST_OK_FOR_Ppositive(VALUE, NBITS) \ | |
433 ((VALUE) > 0 && (VALUE) < (1 << (NBITS))) | |
434 #define CONST_OK_FOR_Pnegative(VALUE, NBITS) \ | |
435 ((VALUE) < 0 && (VALUE) > -(1 << (NBITS))) | |
436 #define CONST_OK_FOR_P(VALUE, STR) \ | |
437 ((STR)[1] >= '1' && (STR)[1] <= '9' && (STR)[2] == '<' \ | |
438 ? (((STR)[3] == '0' || ((STR)[3] == 'X' && TARGET_H8300SX)) \ | |
439 && CONST_OK_FOR_Pnegative ((VALUE), (STR)[1] - '0')) \ | |
440 : ((STR)[1] >= '1' && (STR)[1] <= '9' && (STR)[2] == '>') \ | |
441 ? (((STR)[3] == '0' || ((STR)[3] == 'X' && TARGET_H8300SX)) \ | |
442 && CONST_OK_FOR_Ppositive ((VALUE), (STR)[1] - '0')) \ | |
443 : 0) | |
444 #define CONSTRAINT_LEN_FOR_P(STR) \ | |
445 ((((STR)[1] >= '1' && (STR)[1] <= '9') \ | |
446 && ((STR)[2] == '<' || (STR)[2] == '>') \ | |
447 && ((STR)[3] == 'X' || (STR)[3] == '0')) ? 4 \ | |
448 : 0) | |
449 | |
450 #define CONST_OK_FOR_CONSTRAINT_P(VALUE, C, STR) \ | |
451 ((C) == 'P' ? CONST_OK_FOR_P ((VALUE), (STR)) \ | |
452 : CONST_OK_FOR_LETTER_P ((VALUE), (C))) | |
453 | |
454 #define CONST_OK_FOR_LETTER_P(VALUE, C) \ | |
455 ((C) == 'I' ? CONST_OK_FOR_I (VALUE) : \ | |
456 (C) == 'J' ? CONST_OK_FOR_J (VALUE) : \ | |
457 (C) == 'L' ? CONST_OK_FOR_L (VALUE) : \ | |
458 (C) == 'M' ? CONST_OK_FOR_M (VALUE) : \ | |
459 (C) == 'N' ? CONST_OK_FOR_N (VALUE) : \ | |
460 (C) == 'O' ? CONST_OK_FOR_O (VALUE) : \ | |
461 0) | |
462 | |
463 /* Similar, but for floating constants, and defining letters G and H. | |
464 Here VALUE is the CONST_DOUBLE rtx itself. | |
465 | |
466 `G' is a floating-point zero. */ | |
467 | |
468 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ | |
469 ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode) \ | |
470 : 0) | |
471 | |
472 /* Given an rtx X being reloaded into a reg required to be | |
473 in class CLASS, return the class of reg to actually use. | |
474 In general this is just CLASS; but on some machines | |
475 in some cases it is preferable to use a more restrictive class. */ | |
476 | |
477 #define PREFERRED_RELOAD_CLASS(X, CLASS) (CLASS) | |
478 | |
479 /* Return the maximum number of consecutive registers | |
480 needed to represent mode MODE in a register of class CLASS. */ | |
481 | |
482 /* On the H8, this is the size of MODE in words. */ | |
483 | |
484 #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
485 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
486 | |
487 /* Any SI register-to-register move may need to be reloaded, | |
488 so define REGISTER_MOVE_COST to be > 2 so that reload never | |
489 shortcuts. */ | |
490 | |
491 #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \ | |
492 (CLASS1 == MAC_REGS || CLASS2 == MAC_REGS ? 6 : 3) | |
493 | |
494 /* Stack layout; function entry, exit and calling. */ | |
495 | |
496 /* Define this if pushing a word on the stack | |
497 makes the stack pointer a smaller address. */ | |
498 | |
499 #define STACK_GROWS_DOWNWARD | |
500 | |
501 /* Define this to nonzero if the nominal address of the stack frame | |
502 is at the high-address end of the local variables; | |
503 that is, each additional local variable allocated | |
504 goes at a more negative offset in the frame. */ | |
505 | |
506 #define FRAME_GROWS_DOWNWARD 1 | |
507 | |
508 /* Offset within stack frame to start allocating local variables at. | |
509 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
510 first local allocated. Otherwise, it is the offset to the BEGINNING | |
511 of the first local allocated. */ | |
512 | |
513 #define STARTING_FRAME_OFFSET 0 | |
514 | |
515 /* If we generate an insn to push BYTES bytes, | |
516 this says how many the stack pointer really advances by. | |
517 | |
518 On the H8/300, @-sp really pushes a byte if you ask it to - but that's | |
519 dangerous, so we claim that it always pushes a word, then we catch | |
520 the mov.b rx,@-sp and turn it into a mov.w rx,@-sp on output. | |
521 | |
522 On the H8/300H, we simplify TARGET_QUICKCALL by setting this to 4 | |
523 and doing a similar thing. */ | |
524 | |
525 #define PUSH_ROUNDING(BYTES) \ | |
526 (((BYTES) + PARM_BOUNDARY / 8 - 1) & -PARM_BOUNDARY / 8) | |
527 | |
528 /* Offset of first parameter from the argument pointer register value. */ | |
529 /* Is equal to the size of the saved fp + pc, even if an fp isn't | |
530 saved since the value is used before we know. */ | |
531 | |
532 #define FIRST_PARM_OFFSET(FNDECL) 0 | |
533 | |
534 /* Value is the number of bytes of arguments automatically | |
535 popped when returning from a subroutine call. | |
536 FUNDECL is the declaration node of the function (as a tree), | |
537 FUNTYPE is the data type of the function (as a tree), | |
538 or for a library call it is an identifier node for the subroutine name. | |
539 SIZE is the number of bytes of arguments passed on the stack. | |
540 | |
541 On the H8 the return does not pop anything. */ | |
542 | |
543 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) 0 | |
544 | |
545 /* Definitions for register eliminations. | |
546 | |
547 This is an array of structures. Each structure initializes one pair | |
548 of eliminable registers. The "from" register number is given first, | |
549 followed by "to". Eliminations of the same "from" register are listed | |
550 in order of preference. | |
551 | |
552 We have three registers that can be eliminated on the h8300. | |
553 First, the frame pointer register can often be eliminated in favor | |
554 of the stack pointer register. Secondly, the argument pointer | |
555 register and the return address pointer register are always | |
556 eliminated; they are replaced with either the stack or frame | |
557 pointer. */ | |
558 | |
559 #define ELIMINABLE_REGS \ | |
560 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
561 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
562 { RETURN_ADDRESS_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
563 { RETURN_ADDRESS_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
564 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
565 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} | |
566 | |
567 /* Given FROM and TO register numbers, say whether this elimination is allowed. | |
568 Frame pointer elimination is automatically handled. | |
569 | |
570 For the h8300, if frame pointer elimination is being done, we would like to | |
571 convert ap and rp into sp, not fp. | |
572 | |
573 All other eliminations are valid. */ | |
574 | |
575 #define CAN_ELIMINATE(FROM, TO) \ | |
576 ((TO) == STACK_POINTER_REGNUM ? ! frame_pointer_needed : 1) | |
577 | |
578 /* Define the offset between two registers, one to be eliminated, and the other | |
579 its replacement, at the start of a routine. */ | |
580 | |
581 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
582 ((OFFSET) = h8300_initial_elimination_offset ((FROM), (TO))) | |
583 | |
584 /* Define how to find the value returned by a function. | |
585 VALTYPE is the data type of the value (as a tree). | |
586 If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
587 otherwise, FUNC is 0. | |
588 | |
589 On the H8 the return value is in R0/R1. */ | |
590 | |
591 #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
592 gen_rtx_REG (TYPE_MODE (VALTYPE), R0_REG) | |
593 | |
594 /* Define how to find the value returned by a library function | |
595 assuming the value has mode MODE. */ | |
596 | |
597 /* On the H8 the return value is in R0/R1. */ | |
598 | |
599 #define LIBCALL_VALUE(MODE) \ | |
600 gen_rtx_REG (MODE, R0_REG) | |
601 | |
602 /* 1 if N is a possible register number for a function value. | |
603 On the H8, R0 is the only register thus used. */ | |
604 | |
605 #define FUNCTION_VALUE_REGNO_P(N) ((N) == R0_REG) | |
606 | |
607 /* Define this if PCC uses the nonreentrant convention for returning | |
608 structure and union values. */ | |
609 | |
610 /*#define PCC_STATIC_STRUCT_RETURN*/ | |
611 | |
612 /* 1 if N is a possible register number for function argument passing. | |
613 On the H8, no registers are used in this way. */ | |
614 | |
615 #define FUNCTION_ARG_REGNO_P(N) (TARGET_QUICKCALL ? N < 3 : 0) | |
616 | |
617 /* When defined, the compiler allows registers explicitly used in the | |
618 rtl to be used as spill registers but prevents the compiler from | |
619 extending the lifetime of these registers. */ | |
620 | |
621 #define SMALL_REGISTER_CLASSES 1 | |
622 | |
623 /* Define a data type for recording info about an argument list | |
624 during the scan of that argument list. This data type should | |
625 hold all necessary information about the function itself | |
626 and about the args processed so far, enough to enable macros | |
627 such as FUNCTION_ARG to determine where the next arg should go. | |
628 | |
629 On the H8/300, this is a two item struct, the first is the number | |
630 of bytes scanned so far and the second is the rtx of the called | |
631 library function if any. */ | |
632 | |
633 #define CUMULATIVE_ARGS struct cum_arg | |
634 struct cum_arg | |
635 { | |
636 int nbytes; | |
637 struct rtx_def *libcall; | |
638 }; | |
639 | |
640 /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
641 for a call to a function whose data type is FNTYPE. | |
642 For a library call, FNTYPE is 0. | |
643 | |
644 On the H8/300, the offset starts at 0. */ | |
645 | |
646 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ | |
647 ((CUM).nbytes = 0, (CUM).libcall = LIBNAME) | |
648 | |
649 /* Update the data in CUM to advance over an argument | |
650 of mode MODE and data type TYPE. | |
651 (TYPE is null for libcalls where that information may not be available.) */ | |
652 | |
653 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
654 ((CUM).nbytes += ((MODE) != BLKmode \ | |
655 ? (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD \ | |
656 : (int_size_in_bytes (TYPE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD)) | |
657 | |
658 /* Define where to put the arguments to a function. | |
659 Value is zero to push the argument on the stack, | |
660 or a hard register in which to store the argument. | |
661 | |
662 MODE is the argument's machine mode. | |
663 TYPE is the data type of the argument (as a tree). | |
664 This is null for libcalls where that information may | |
665 not be available. | |
666 CUM is a variable of type CUMULATIVE_ARGS which gives info about | |
667 the preceding args and about the function being called. | |
668 NAMED is nonzero if this argument is a named parameter | |
669 (otherwise it is an extra parameter matching an ellipsis). */ | |
670 | |
671 /* On the H8/300 all normal args are pushed, unless -mquickcall in which | |
672 case the first 3 arguments are passed in registers. | |
673 See function `function_arg'. */ | |
674 | |
675 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ | |
676 function_arg (&CUM, MODE, TYPE, NAMED) | |
677 | |
678 /* Output assembler code to FILE to increment profiler label # LABELNO | |
679 for profiling a function entry. */ | |
680 | |
681 #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
682 fprintf (FILE, "\t%s\t#LP%d,%s\n\tjsr @mcount\n", \ | |
683 h8_mov_op, (LABELNO), h8_reg_names[0]); | |
684 | |
685 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, | |
686 the stack pointer does not matter. The value is tested only in | |
687 functions that have frame pointers. | |
688 No definition is equivalent to always zero. */ | |
689 | |
690 #define EXIT_IGNORE_STACK 0 | |
691 | |
692 /* We emit the entire trampoline with INITIALIZE_TRAMPOLINE. | |
693 Depending on the pointer size, we use a different trampoline. | |
694 | |
695 Pmode == HImode | |
696 vvvv context | |
697 1 0000 7903xxxx mov.w #0x1234,r3 | |
698 2 0004 5A00xxxx jmp @0x1234 | |
699 ^^^^ function | |
700 | |
701 Pmode == SImode | |
702 vvvvvvvv context | |
703 2 0000 7A03xxxxxxxx mov.l #0x12345678,er3 | |
704 3 0006 5Axxxxxx jmp @0x123456 | |
705 ^^^^^^ function | |
706 */ | |
707 | |
708 /* Length in units of the trampoline for entering a nested function. */ | |
709 | |
710 #define TRAMPOLINE_SIZE ((Pmode == HImode) ? 8 : 12) | |
711 | |
712 /* Emit RTL insns to build a trampoline. | |
713 FNADDR is an RTX for the address of the function's pure code. | |
714 CXT is an RTX for the static chain value for the function. */ | |
715 | |
716 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ | |
717 do \ | |
718 { \ | |
719 if (Pmode == HImode) \ | |
720 { \ | |
721 emit_move_insn (gen_rtx_MEM (HImode, (TRAMP)), GEN_INT (0x7903)); \ | |
722 emit_move_insn (gen_rtx_MEM (Pmode, plus_constant ((TRAMP), 2)), \ | |
723 (CXT)); \ | |
724 emit_move_insn (gen_rtx_MEM (Pmode, plus_constant ((TRAMP), 4)), \ | |
725 GEN_INT (0x5a00)); \ | |
726 emit_move_insn (gen_rtx_MEM (Pmode, plus_constant ((TRAMP), 6)), \ | |
727 (FNADDR)); \ | |
728 } \ | |
729 else \ | |
730 { \ | |
731 rtx tem = gen_reg_rtx (Pmode); \ | |
732 \ | |
733 emit_move_insn (gen_rtx_MEM (HImode, (TRAMP)), GEN_INT (0x7a03)); \ | |
734 emit_move_insn (gen_rtx_MEM (Pmode, plus_constant ((TRAMP), 2)), \ | |
735 (CXT)); \ | |
736 emit_move_insn (tem, (FNADDR)); \ | |
737 emit_insn (gen_andsi3 (tem, tem, GEN_INT (0x00ffffff))); \ | |
738 emit_insn (gen_iorsi3 (tem, tem, GEN_INT (0x5a000000))); \ | |
739 emit_move_insn (gen_rtx_MEM (Pmode, plus_constant ((TRAMP), 6)), \ | |
740 tem); \ | |
741 } \ | |
742 } \ | |
743 while (0) | |
744 | |
745 /* Addressing modes, and classification of registers for them. */ | |
746 | |
747 #define HAVE_POST_INCREMENT 1 | |
748 #define HAVE_PRE_DECREMENT 1 | |
749 #define HAVE_POST_DECREMENT TARGET_H8300SX | |
750 #define HAVE_PRE_INCREMENT TARGET_H8300SX | |
751 | |
752 /* Macros to check register numbers against specific register classes. */ | |
753 | |
754 /* These assume that REGNO is a hard or pseudo reg number. | |
755 They give nonzero only if REGNO is a hard reg of the suitable class | |
756 or a pseudo reg currently allocated to a suitable hard reg. | |
757 Since they use reg_renumber, they are safe only once reg_renumber | |
758 has been allocated, which happens in local-alloc.c. */ | |
759 | |
760 #define REGNO_OK_FOR_INDEX_P(regno) 0 | |
761 | |
762 #define REGNO_OK_FOR_BASE_P(regno) \ | |
763 (((regno) < FIRST_PSEUDO_REGISTER && regno != MAC_REG) \ | |
764 || reg_renumber[regno] >= 0) | |
765 | |
766 /* Maximum number of registers that can appear in a valid memory address. */ | |
767 | |
768 #define MAX_REGS_PER_ADDRESS 1 | |
769 | |
770 /* 1 if X is an rtx for a constant that is a valid address. */ | |
771 | |
772 #define CONSTANT_ADDRESS_P(X) \ | |
773 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ | |
774 || (GET_CODE (X) == CONST_INT \ | |
775 /* We handle signed and unsigned offsets here. */ \ | |
776 && INTVAL (X) > (TARGET_H8300 ? -0x10000 : -0x1000000) \ | |
777 && INTVAL (X) < (TARGET_H8300 ? 0x10000 : 0x1000000)) \ | |
778 || (GET_CODE (X) == HIGH || GET_CODE (X) == CONST)) | |
779 | |
780 /* Nonzero if the constant value X is a legitimate general operand. | |
781 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ | |
782 | |
783 #define LEGITIMATE_CONSTANT_P(X) (h8300_legitimate_constant_p (X)) | |
784 | |
785 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
786 and check its validity for a certain class. | |
787 We have two alternate definitions for each of them. | |
788 The usual definition accepts all pseudo regs; the other rejects | |
789 them unless they have been allocated suitable hard regs. | |
790 The symbol REG_OK_STRICT causes the latter definition to be used. | |
791 | |
792 Most source files want to accept pseudo regs in the hope that | |
793 they will get allocated to the class that the insn wants them to be in. | |
794 Source files for reload pass need to be strict. | |
795 After reload, it makes no difference, since pseudo regs have | |
796 been eliminated by then. */ | |
797 | |
798 /* Non-strict versions. */ | |
799 #define REG_OK_FOR_INDEX_NONSTRICT_P(X) 0 | |
800 /* Don't use REGNO_OK_FOR_BASE_P here because it uses reg_renumber. */ | |
801 #define REG_OK_FOR_BASE_NONSTRICT_P(X) \ | |
802 (REGNO (X) >= FIRST_PSEUDO_REGISTER || REGNO (X) != MAC_REG) | |
803 | |
804 /* Strict versions. */ | |
805 #define REG_OK_FOR_INDEX_STRICT_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) | |
806 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
807 | |
808 #ifndef REG_OK_STRICT | |
809 | |
810 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_NONSTRICT_P (X) | |
811 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NONSTRICT_P (X) | |
812 | |
813 #else | |
814 | |
815 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_STRICT_P (X) | |
816 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X) | |
817 | |
818 #endif | |
819 | |
820 /* Extra constraints. */ | |
821 | |
822 #define OK_FOR_Q(OP) \ | |
823 (TARGET_H8300SX && memory_operand ((OP), VOIDmode)) | |
824 | |
825 #define OK_FOR_R(OP) \ | |
826 (GET_CODE (OP) == CONST_INT \ | |
827 ? !h8300_shift_needs_scratch_p (INTVAL (OP), QImode) \ | |
828 : 0) | |
829 | |
830 #define OK_FOR_S(OP) \ | |
831 (GET_CODE (OP) == CONST_INT \ | |
832 ? !h8300_shift_needs_scratch_p (INTVAL (OP), HImode) \ | |
833 : 0) | |
834 | |
835 #define OK_FOR_T(OP) \ | |
836 (GET_CODE (OP) == CONST_INT \ | |
837 ? !h8300_shift_needs_scratch_p (INTVAL (OP), SImode) \ | |
838 : 0) | |
839 | |
840 /* 'U' if valid for a bset destination; | |
841 i.e. a register, register indirect, or the eightbit memory region | |
842 (a SYMBOL_REF with an SYMBOL_REF_FLAG set). | |
843 | |
844 On the H8S 'U' can also be a 16bit or 32bit absolute. */ | |
845 #define OK_FOR_U(OP) \ | |
846 ((GET_CODE (OP) == REG && REG_OK_FOR_BASE_P (OP)) \ | |
847 || (GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG \ | |
848 && REG_OK_FOR_BASE_P (XEXP (OP, 0))) \ | |
849 || (GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == SYMBOL_REF \ | |
850 && TARGET_H8300S) \ | |
851 || (GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == CONST \ | |
852 && GET_CODE (XEXP (XEXP (OP, 0), 0)) == PLUS \ | |
853 && GET_CODE (XEXP (XEXP (XEXP (OP, 0), 0), 0)) == SYMBOL_REF \ | |
854 && GET_CODE (XEXP (XEXP (XEXP (OP, 0), 0), 1)) == CONST_INT \ | |
855 && (TARGET_H8300S \ | |
856 || SYMBOL_REF_FLAG (XEXP (XEXP (XEXP (OP, 0), 0), 0)))) \ | |
857 || (GET_CODE (OP) == MEM \ | |
858 && h8300_eightbit_constant_address_p (XEXP (OP, 0))) \ | |
859 || (GET_CODE (OP) == MEM && TARGET_H8300S \ | |
860 && GET_CODE (XEXP (OP, 0)) == CONST_INT)) | |
861 | |
862 /* Multi-letter constraints starting with W are to be used for | |
863 operands that require a memory operand, i.e,. that are never used | |
864 along with register constraints (see EXTRA_MEMORY_CONSTRAINTS). | |
865 For operands that require a memory operand (or not) but that always | |
866 accept a register, a multi-letter constraint starting with Y should | |
867 be used instead. */ | |
868 | |
869 #define OK_FOR_WU(OP) \ | |
870 (GET_CODE (OP) == MEM && OK_FOR_U (OP)) | |
871 | |
872 #define OK_FOR_W(OP, STR) \ | |
873 ((STR)[1] == 'U' ? OK_FOR_WU (OP) \ | |
874 : 0) | |
875 | |
876 #define CONSTRAINT_LEN_FOR_W(STR) \ | |
877 ((STR)[1] == 'U' ? 2 \ | |
878 : 0) | |
879 | |
880 /* We don't have any constraint starting with Y yet, but before | |
881 someone uses it for a one-letter constraint and we're left without | |
882 any upper-case constraints left, we reserve it for extensions | |
883 here. */ | |
884 #define OK_FOR_Y(OP, STR) \ | |
885 (0) | |
886 | |
887 #define CONSTRAINT_LEN_FOR_Y(STR) \ | |
888 (0) | |
889 | |
890 #define OK_FOR_Z(OP) \ | |
891 (TARGET_H8300SX \ | |
892 && GET_CODE (OP) == MEM \ | |
893 && CONSTANT_P (XEXP ((OP), 0))) | |
894 | |
895 #define EXTRA_CONSTRAINT_STR(OP, C, STR) \ | |
896 ((C) == 'Q' ? OK_FOR_Q (OP) : \ | |
897 (C) == 'R' ? OK_FOR_R (OP) : \ | |
898 (C) == 'S' ? OK_FOR_S (OP) : \ | |
899 (C) == 'T' ? OK_FOR_T (OP) : \ | |
900 (C) == 'U' ? OK_FOR_U (OP) : \ | |
901 (C) == 'W' ? OK_FOR_W ((OP), (STR)) : \ | |
902 (C) == 'Y' ? OK_FOR_Y ((OP), (STR)) : \ | |
903 (C) == 'Z' ? OK_FOR_Z (OP) : \ | |
904 0) | |
905 | |
906 #define CONSTRAINT_LEN(C, STR) \ | |
907 ((C) == 'P' ? CONSTRAINT_LEN_FOR_P (STR) \ | |
908 : (C) == 'W' ? CONSTRAINT_LEN_FOR_W (STR) \ | |
909 : (C) == 'Y' ? CONSTRAINT_LEN_FOR_Y (STR) \ | |
910 : DEFAULT_CONSTRAINT_LEN ((C), (STR))) | |
911 | |
912 /* Experiments suggest that it's better not add 'Q' or 'U' here. No | |
913 patterns need it for correctness (no patterns use 'Q' and 'U' | |
914 without also providing a register alternative). And defining it | |
915 will mean that a spilled pseudo could be replaced by its frame | |
916 location in several consecutive insns. | |
917 | |
918 Instead, it seems to be better to force pseudos to be reloaded | |
919 into registers and then use peepholes to recombine insns when | |
920 beneficial. | |
921 | |
922 Unfortunately, for WU (unlike plain U, that matches regs as well), | |
923 we must require a memory address. In fact, all multi-letter | |
924 constraints started with W are supposed to have this property, so | |
925 we just test for W here. */ | |
926 #define EXTRA_MEMORY_CONSTRAINT(C, STR) \ | |
927 ((C) == 'W') | |
928 | |
929 | |
930 #ifndef REG_OK_STRICT | |
931 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ | |
932 do \ | |
933 { \ | |
934 if (h8300_legitimate_address_p ((MODE), (X), 0)) \ | |
935 goto ADDR; \ | |
936 } \ | |
937 while (0) | |
938 #else | |
939 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ | |
940 do \ | |
941 { \ | |
942 if (h8300_legitimate_address_p ((MODE), (X), 1)) \ | |
943 goto ADDR; \ | |
944 } \ | |
945 while (0) | |
946 #endif | |
947 | |
948 /* Go to LABEL if ADDR (a legitimate address expression) | |
949 has an effect that depends on the machine mode it is used for. | |
950 | |
951 On the H8/300, the predecrement and postincrement address depend thus | |
952 (the amount of decrement or increment being the length of the operand). */ | |
953 | |
954 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \ | |
955 if (GET_CODE (ADDR) == PLUS \ | |
956 && h8300_get_index (XEXP (ADDR, 0), VOIDmode, 0) != XEXP (ADDR, 0)) \ | |
957 goto LABEL; | |
958 | |
959 /* Specify the machine mode that this machine uses | |
960 for the index in the tablejump instruction. */ | |
961 #define CASE_VECTOR_MODE Pmode | |
962 | |
963 /* Define this as 1 if `char' should by default be signed; else as 0. | |
964 | |
965 On the H8/300, sign extension is expensive, so we'll say that chars | |
966 are unsigned. */ | |
967 #define DEFAULT_SIGNED_CHAR 0 | |
968 | |
969 /* This flag, if defined, says the same insns that convert to a signed fixnum | |
970 also convert validly to an unsigned one. */ | |
971 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC | |
972 | |
973 /* Max number of bytes we can move from memory to memory | |
974 in one reasonably fast instruction. */ | |
975 #define MOVE_MAX (TARGET_H8300H || TARGET_H8300S ? 4 : 2) | |
976 #define MAX_MOVE_MAX 4 | |
977 | |
978 /* Nonzero if access to memory by bytes is slow and undesirable. */ | |
979 #define SLOW_BYTE_ACCESS TARGET_SLOWBYTE | |
980 | |
981 /* Define if shifts truncate the shift count | |
982 which implies one can omit a sign-extension or zero-extension | |
983 of a shift count. */ | |
984 /* #define SHIFT_COUNT_TRUNCATED */ | |
985 | |
986 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
987 is done just by pretending it is already truncated. */ | |
988 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
989 | |
990 /* Specify the machine mode that pointers have. | |
991 After generation of rtl, the compiler makes no further distinction | |
992 between pointers and any other objects of this machine mode. */ | |
993 #define Pmode \ | |
994 ((TARGET_H8300H || TARGET_H8300S) && !TARGET_NORMAL_MODE ? SImode : HImode) | |
995 | |
996 /* ANSI C types. | |
997 We use longs for the H8/300H and the H8S because ints can be 16 or 32. | |
998 GCC requires SIZE_TYPE to be the same size as pointers. */ | |
999 #define SIZE_TYPE \ | |
1000 (TARGET_H8300 || TARGET_NORMAL_MODE ? TARGET_INT32 ? "short unsigned int" : "unsigned int" : "long unsigned int") | |
1001 #define PTRDIFF_TYPE \ | |
1002 (TARGET_H8300 || TARGET_NORMAL_MODE ? TARGET_INT32 ? "short int" : "int" : "long int") | |
1003 | |
1004 #define POINTER_SIZE \ | |
1005 ((TARGET_H8300H || TARGET_H8300S) && !TARGET_NORMAL_MODE ? 32 : 16) | |
1006 | |
1007 #define WCHAR_TYPE "short unsigned int" | |
1008 #define WCHAR_TYPE_SIZE 16 | |
1009 | |
1010 /* A function address in a call instruction | |
1011 is a byte address (for indexing purposes) | |
1012 so give the MEM rtx a byte's mode. */ | |
1013 #define FUNCTION_MODE QImode | |
1014 | |
1015 /* Return the length of JUMP's delay slot insn (0 if it has none). | |
1016 If JUMP is a delayed branch, NEXT_INSN (PREV_INSN (JUMP)) will | |
1017 be the containing SEQUENCE, not JUMP itself. */ | |
1018 #define DELAY_SLOT_LENGTH(JUMP) \ | |
1019 (NEXT_INSN (PREV_INSN (JUMP)) == JUMP ? 0 : 2) | |
1020 | |
1021 #define BRANCH_COST(speed_p, predictable_p) 0 | |
1022 | |
1023 /* Tell final.c how to eliminate redundant test instructions. */ | |
1024 | |
1025 /* Here we define machine-dependent flags and fields in cc_status | |
1026 (see `conditions.h'). No extra ones are needed for the h8300. */ | |
1027 | |
1028 /* Store in cc_status the expressions | |
1029 that the condition codes will describe | |
1030 after execution of an instruction whose pattern is EXP. | |
1031 Do not alter them if the instruction would not alter the cc's. */ | |
1032 | |
1033 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc (EXP, INSN) | |
1034 | |
1035 /* The add insns don't set overflow in a usable way. */ | |
1036 #define CC_OVERFLOW_UNUSABLE 01000 | |
1037 /* The mov,and,or,xor insns don't set carry. That's OK though as the | |
1038 Z bit is all we need when doing unsigned comparisons on the result of | |
1039 these insns (since they're always with 0). However, conditions.h has | |
1040 CC_NO_OVERFLOW defined for this purpose. Rename it to something more | |
1041 understandable. */ | |
1042 #define CC_NO_CARRY CC_NO_OVERFLOW | |
1043 | |
1044 /* Control the assembler format that we output. */ | |
1045 | |
1046 /* Output to assembler file text saying following lines | |
1047 may contain character constants, extra white space, comments, etc. */ | |
1048 | |
1049 #define ASM_APP_ON "; #APP\n" | |
1050 | |
1051 /* Output to assembler file text saying following lines | |
1052 no longer contain unusual constructs. */ | |
1053 | |
1054 #define ASM_APP_OFF "; #NO_APP\n" | |
1055 | |
1056 #define FILE_ASM_OP "\t.file\n" | |
1057 | |
1058 /* The assembler op to get a word, 2 bytes for the H8/300, 4 for H8/300H. */ | |
1059 #define ASM_WORD_OP \ | |
1060 (TARGET_H8300 || TARGET_NORMAL_MODE ? "\t.word\t" : "\t.long\t") | |
1061 | |
1062 #define TEXT_SECTION_ASM_OP "\t.section .text" | |
1063 #define DATA_SECTION_ASM_OP "\t.section .data" | |
1064 #define BSS_SECTION_ASM_OP "\t.section .bss" | |
1065 | |
1066 #undef DO_GLOBAL_CTORS_BODY | |
1067 #define DO_GLOBAL_CTORS_BODY \ | |
1068 { \ | |
1069 extern func_ptr __ctors[]; \ | |
1070 extern func_ptr __ctors_end[]; \ | |
1071 func_ptr *p; \ | |
1072 for (p = __ctors_end; p > __ctors; ) \ | |
1073 { \ | |
1074 (*--p)(); \ | |
1075 } \ | |
1076 } | |
1077 | |
1078 #undef DO_GLOBAL_DTORS_BODY | |
1079 #define DO_GLOBAL_DTORS_BODY \ | |
1080 { \ | |
1081 extern func_ptr __dtors[]; \ | |
1082 extern func_ptr __dtors_end[]; \ | |
1083 func_ptr *p; \ | |
1084 for (p = __dtors; p < __dtors_end; p++) \ | |
1085 { \ | |
1086 (*p)(); \ | |
1087 } \ | |
1088 } | |
1089 | |
1090 /* How to refer to registers in assembler output. | |
1091 This sequence is indexed by compiler's hard-register-number (see above). */ | |
1092 | |
1093 #define REGISTER_NAMES \ | |
1094 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp", "mac", "ap", "rap", "fp" } | |
1095 | |
1096 #define ADDITIONAL_REGISTER_NAMES \ | |
1097 { {"er0", 0}, {"er1", 1}, {"er2", 2}, {"er3", 3}, {"er4", 4}, \ | |
1098 {"er5", 5}, {"er6", 6}, {"er7", 7}, {"r7", 7} } | |
1099 | |
1100 /* Globalizing directive for a label. */ | |
1101 #define GLOBAL_ASM_OP "\t.global " | |
1102 | |
1103 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ | |
1104 ASM_OUTPUT_LABEL (FILE, NAME) | |
1105 | |
1106 /* The prefix to add to user-visible assembler symbols. */ | |
1107 | |
1108 #define USER_LABEL_PREFIX "_" | |
1109 | |
1110 /* This is how to store into the string LABEL | |
1111 the symbol_ref name of an internal numbered label where | |
1112 PREFIX is the class of label and NUM is the number within the class. | |
1113 This is suitable for output with `assemble_name'. | |
1114 | |
1115 N.B.: The h8300.md branch_true and branch_false patterns also know | |
1116 how to generate internal labels. */ | |
1117 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ | |
1118 sprintf (LABEL, "*.%s%lu", PREFIX, (unsigned long)(NUM)) | |
1119 | |
1120 /* This is how to output an insn to push a register on the stack. | |
1121 It need not be very fast code. */ | |
1122 | |
1123 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \ | |
1124 fprintf (FILE, "\t%s\t%s\n", h8_push_op, h8_reg_names[REGNO]) | |
1125 | |
1126 /* This is how to output an insn to pop a register from the stack. | |
1127 It need not be very fast code. */ | |
1128 | |
1129 #define ASM_OUTPUT_REG_POP(FILE, REGNO) \ | |
1130 fprintf (FILE, "\t%s\t%s\n", h8_pop_op, h8_reg_names[REGNO]) | |
1131 | |
1132 /* This is how to output an element of a case-vector that is absolute. */ | |
1133 | |
1134 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ | |
1135 fprintf (FILE, "%s.L%d\n", ASM_WORD_OP, VALUE) | |
1136 | |
1137 /* This is how to output an element of a case-vector that is relative. */ | |
1138 | |
1139 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ | |
1140 fprintf (FILE, "%s.L%d-.L%d\n", ASM_WORD_OP, VALUE, REL) | |
1141 | |
1142 /* This is how to output an assembler line | |
1143 that says to advance the location counter | |
1144 to a multiple of 2**LOG bytes. */ | |
1145 | |
1146 #define ASM_OUTPUT_ALIGN(FILE, LOG) \ | |
1147 if ((LOG) != 0) \ | |
1148 fprintf (FILE, "\t.align %d\n", (LOG)) | |
1149 | |
1150 #define ASM_OUTPUT_SKIP(FILE, SIZE) \ | |
1151 fprintf (FILE, "\t.space %d\n", (int)(SIZE)) | |
1152 | |
1153 /* This says how to output an assembler line | |
1154 to define a global common symbol. */ | |
1155 | |
1156 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ | |
1157 ( fputs ("\t.comm ", (FILE)), \ | |
1158 assemble_name ((FILE), (NAME)), \ | |
1159 fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE))) | |
1160 | |
1161 /* This says how to output the assembler to define a global | |
1162 uninitialized but not common symbol. | |
1163 Try to use asm_output_bss to implement this macro. */ | |
1164 | |
1165 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED) \ | |
1166 asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED)) | |
1167 | |
1168 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ | |
1169 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) | |
1170 | |
1171 /* This says how to output an assembler line | |
1172 to define a local common symbol. */ | |
1173 | |
1174 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ | |
1175 ( fputs ("\t.lcomm ", (FILE)), \ | |
1176 assemble_name ((FILE), (NAME)), \ | |
1177 fprintf ((FILE), ",%d\n", (int)(SIZE))) | |
1178 | |
1179 #define ASM_PN_FORMAT "%s___%lu" | |
1180 | |
1181 /* Print an instruction operand X on file FILE. | |
1182 Look in h8300.c for details. */ | |
1183 | |
1184 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ | |
1185 ((CODE) == '#') | |
1186 | |
1187 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE) | |
1188 | |
1189 /* Print a memory operand whose address is X, on file FILE. | |
1190 This uses a function in h8300.c. */ | |
1191 | |
1192 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR) | |
1193 | |
1194 /* H8300 specific pragmas. */ | |
1195 #define REGISTER_TARGET_PRAGMAS() \ | |
1196 do \ | |
1197 { \ | |
1198 c_register_pragma (0, "saveall", h8300_pr_saveall); \ | |
1199 c_register_pragma (0, "interrupt", h8300_pr_interrupt); \ | |
1200 } \ | |
1201 while (0) | |
1202 | |
1203 #define FINAL_PRESCAN_INSN(insn, operand, nop) \ | |
1204 final_prescan_insn (insn, operand, nop) | |
1205 | |
1206 extern int h8300_move_ratio; | |
1207 #define MOVE_RATIO(speed) h8300_move_ratio | |
1208 | |
1209 /* Machine-specific symbol_ref flags. */ | |
1210 #define SYMBOL_FLAG_FUNCVEC_FUNCTION (SYMBOL_FLAG_MACH_DEP << 0) | |
1211 #define SYMBOL_FLAG_EIGHTBIT_DATA (SYMBOL_FLAG_MACH_DEP << 1) | |
1212 #define SYMBOL_FLAG_TINY_DATA (SYMBOL_FLAG_MACH_DEP << 2) | |
1213 | |
1214 #endif /* ! GCC_H8300_H */ |