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[AArch64] Remember to cost operand 0 in FP compare-with-0.0 case
[official-gcc.git] / gcc / config / ia64 / ia64.h
blob943faf9e0a966e9ab0b3494e3af85e685ad1f15e
1 /* Definitions of target machine GNU compiler. IA-64 version.
2 Copyright (C) 1999-2015 Free Software Foundation, Inc.
3 Contributed by James E. Wilson <wilson@cygnus.com> and
4 David Mosberger <davidm@hpl.hp.com>.
5
6 This file is part of GCC.
7
8 GCC 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 3, or (at your option)
11 any later version.
12
13 GCC 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 GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 /* ??? Look at ABI group documents for list of preprocessor macros and
23 other features required for ABI compliance. */
24
25 /* ??? Functions containing a non-local goto target save many registers. Why?
26 See for instance execute/920428-2.c. */
27
28 \f
29 /* Run-time target specifications */
30
31 /* Target CPU builtins. */
32 #define TARGET_CPU_CPP_BUILTINS() \
33 do { \
34 builtin_assert("cpu=ia64"); \
35 builtin_assert("machine=ia64"); \
36 builtin_define("__ia64"); \
37 builtin_define("__ia64__"); \
38 builtin_define("__itanium__"); \
39 if (TARGET_BIG_ENDIAN) \
40 builtin_define("__BIG_ENDIAN__"); \
41 } while (0)
42
43 #ifndef SUBTARGET_EXTRA_SPECS
44 #define SUBTARGET_EXTRA_SPECS
45 #endif
46
47 #define EXTRA_SPECS \
48 { "asm_extra", ASM_EXTRA_SPEC }, \
49 SUBTARGET_EXTRA_SPECS
50
51 #define CC1_SPEC "%(cc1_cpu) "
52
53 #define ASM_EXTRA_SPEC ""
54
55 /* Variables which are this size or smaller are put in the sdata/sbss
56 sections. */
57 extern unsigned int ia64_section_threshold;
58
59 /* If the assembler supports thread-local storage, assume that the
60 system does as well. If a particular target system has an
61 assembler that supports TLS -- but the rest of the system does not
62 support TLS -- that system should explicit define TARGET_HAVE_TLS
63 to false in its own configuration file. */
64 #if !defined(TARGET_HAVE_TLS) && defined(HAVE_AS_TLS)
65 #define TARGET_HAVE_TLS true
66 #endif
67
68 #define TARGET_TLS14 (ia64_tls_size == 14)
69 #define TARGET_TLS22 (ia64_tls_size == 22)
70 #define TARGET_TLS64 (ia64_tls_size == 64)
71
72 #define TARGET_HPUX 0
73 #define TARGET_HPUX_LD 0
74
75 #define TARGET_ABI_OPEN_VMS 0
76
77 #ifndef TARGET_ILP32
78 #define TARGET_ILP32 0
79 #endif
80
81 #ifndef HAVE_AS_LTOFFX_LDXMOV_RELOCS
82 #define HAVE_AS_LTOFFX_LDXMOV_RELOCS 0
83 #endif
84
85 /* Values for TARGET_INLINE_FLOAT_DIV, TARGET_INLINE_INT_DIV, and
86 TARGET_INLINE_SQRT. */
87
88 enum ia64_inline_type
89 {
90 INL_NO = 0,
91 INL_MIN_LAT = 1,
92 INL_MAX_THR = 2
93 };
94
95 /* Default target_flags if no switches are specified */
96
97 #ifndef TARGET_DEFAULT
98 #define TARGET_DEFAULT (MASK_DWARF2_ASM)
99 #endif
100
101 #ifndef TARGET_CPU_DEFAULT
102 #define TARGET_CPU_DEFAULT 0
103 #endif
104 \f
105 /* Driver configuration */
106
107 /* A C string constant that tells the GCC driver program options to pass to
108 `cc1'. It can also specify how to translate options you give to GCC into
109 options for GCC to pass to the `cc1'. */
110
111 #undef CC1_SPEC
112 #define CC1_SPEC "%{G*}"
113
114 /* A C string constant that tells the GCC driver program options to pass to
115 `cc1plus'. It can also specify how to translate options you give to GCC
116 into options for GCC to pass to the `cc1plus'. */
117
118 /* #define CC1PLUS_SPEC "" */
119 \f
120 /* Storage Layout */
121
122 /* Define this macro to have the value 1 if the most significant bit in a byte
123 has the lowest number; otherwise define it to have the value zero. */
124
125 #define BITS_BIG_ENDIAN 0
126
127 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
128
129 /* Define this macro to have the value 1 if, in a multiword object, the most
130 significant word has the lowest number. */
131
132 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
133
134 #define UNITS_PER_WORD 8
135
136 #define POINTER_SIZE (TARGET_ILP32 ? 32 : 64)
137
138 /* A C expression whose value is zero if pointers that need to be extended
139 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and one if
140 they are zero-extended and negative one if there is a ptr_extend operation.
141
142 You need not define this macro if the `POINTER_SIZE' is equal to the width
143 of `Pmode'. */
144 /* Need this for 32-bit pointers, see hpux.h for setting it. */
145 /* #define POINTERS_EXTEND_UNSIGNED */
146
147 /* A macro to update MODE and UNSIGNEDP when an object whose type is TYPE and
148 which has the specified mode and signedness is to be stored in a register.
149 This macro is only called when TYPE is a scalar type. */
150 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
151 do \
152 { \
153 if (GET_MODE_CLASS (MODE) == MODE_INT \
154 && GET_MODE_SIZE (MODE) < 4) \
155 (MODE) = SImode; \
156 } \
157 while (0)
158
159 #define PARM_BOUNDARY 64
160
161 /* Define this macro if you wish to preserve a certain alignment for the stack
162 pointer. The definition is a C expression for the desired alignment
163 (measured in bits). */
164
165 #define STACK_BOUNDARY 128
166
167 /* Align frames on double word boundaries */
168 #ifndef IA64_STACK_ALIGN
169 #define IA64_STACK_ALIGN(LOC) (((LOC) + 15) & ~15)
170 #endif
171
172 #define FUNCTION_BOUNDARY 128
173
174 /* Optional x86 80-bit float, quad-precision 128-bit float, and quad-word
175 128-bit integers all require 128-bit alignment. */
176 #define BIGGEST_ALIGNMENT 128
177
178 /* If defined, a C expression to compute the alignment for a static variable.
179 TYPE is the data type, and ALIGN is the alignment that the object
180 would ordinarily have. The value of this macro is used instead of that
181 alignment to align the object. */
182
183 #define DATA_ALIGNMENT(TYPE, ALIGN) \
184 (TREE_CODE (TYPE) == ARRAY_TYPE \
185 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
186 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
187
188 /* If defined, a C expression to compute the alignment given to a constant that
189 is being placed in memory. CONSTANT is the constant and ALIGN is the
190 alignment that the object would ordinarily have. The value of this macro is
191 used instead of that alignment to align the object. */
192
193 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
194 (TREE_CODE (EXP) == STRING_CST \
195 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
196
197 #define STRICT_ALIGNMENT 1
198
199 /* Define this if you wish to imitate the way many other C compilers handle
200 alignment of bitfields and the structures that contain them.
201 The behavior is that the type written for a bit-field (`int', `short', or
202 other integer type) imposes an alignment for the entire structure, as if the
203 structure really did contain an ordinary field of that type. In addition,
204 the bit-field is placed within the structure so that it would fit within such
205 a field, not crossing a boundary for it. */
206 #define PCC_BITFIELD_TYPE_MATTERS 1
207
208 /* An integer expression for the size in bits of the largest integer machine
209 mode that should actually be used. */
210
211 /* Allow pairs of registers to be used, which is the intent of the default. */
212 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TImode)
213
214 /* By default, the C++ compiler will use function addresses in the
215 vtable entries. Setting this nonzero tells the compiler to use
216 function descriptors instead. The value of this macro says how
217 many words wide the descriptor is (normally 2). It is assumed
218 that the address of a function descriptor may be treated as a
219 pointer to a function.
220
221 For reasons known only to HP, the vtable entries (as opposed to
222 normal function descriptors) are 16 bytes wide in 32-bit mode as
223 well, even though the 3rd and 4th words are unused. */
224 #define TARGET_VTABLE_USES_DESCRIPTORS (TARGET_ILP32 ? 4 : 2)
225
226 /* Due to silliness in the HPUX linker, vtable entries must be
227 8-byte aligned even in 32-bit mode. Rather than create multiple
228 ABIs, force this restriction on everyone else too. */
229 #define TARGET_VTABLE_ENTRY_ALIGN 64
230
231 /* Due to the above, we need extra padding for the data entries below 0
232 to retain the alignment of the descriptors. */
233 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE (TARGET_ILP32 ? 2 : 1)
234 \f
235 /* Layout of Source Language Data Types */
236
237 #define INT_TYPE_SIZE 32
238
239 #define SHORT_TYPE_SIZE 16
240
241 #define LONG_TYPE_SIZE (TARGET_ILP32 ? 32 : 64)
242
243 #define LONG_LONG_TYPE_SIZE 64
244
245 #define FLOAT_TYPE_SIZE 32
246
247 #define DOUBLE_TYPE_SIZE 64
248
249 /* long double is XFmode normally, and TFmode for HPUX. It should be
250 TFmode for VMS as well but we only support up to DFmode now. */
251 #define LONG_DOUBLE_TYPE_SIZE \
252 (TARGET_HPUX ? 128 \
253 : TARGET_ABI_OPEN_VMS ? 64 \
254 : 80)
255
256
257 #define DEFAULT_SIGNED_CHAR 1
258
259 /* A C expression for a string describing the name of the data type to use for
260 size values. The typedef name `size_t' is defined using the contents of the
261 string. */
262 /* ??? Needs to be defined for P64 code. */
263 /* #define SIZE_TYPE */
264
265 /* A C expression for a string describing the name of the data type to use for
266 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
267 defined using the contents of the string. See `SIZE_TYPE' above for more
268 information. */
269 /* ??? Needs to be defined for P64 code. */
270 /* #define PTRDIFF_TYPE */
271
272 /* A C expression for a string describing the name of the data type to use for
273 wide characters. The typedef name `wchar_t' is defined using the contents
274 of the string. See `SIZE_TYPE' above for more information. */
275 /* #define WCHAR_TYPE */
276
277 /* A C expression for the size in bits of the data type for wide characters.
278 This is used in `cpp', which cannot make use of `WCHAR_TYPE'. */
279 /* #define WCHAR_TYPE_SIZE */
280
281 \f
282 /* Register Basics */
283
284 /* Number of hardware registers known to the compiler.
285 We have 128 general registers, 128 floating point registers,
286 64 predicate registers, 8 branch registers, one frame pointer,
287 and several "application" registers. */
288
289 #define FIRST_PSEUDO_REGISTER 334
290
291 /* Ranges for the various kinds of registers. */
292 #define ADDL_REGNO_P(REGNO) ((unsigned HOST_WIDE_INT) (REGNO) <= 3)
293 #define GR_REGNO_P(REGNO) ((unsigned HOST_WIDE_INT) (REGNO) <= 127)
294 #define FR_REGNO_P(REGNO) ((REGNO) >= 128 && (REGNO) <= 255)
295 #define FP_REGNO_P(REGNO) ((REGNO) >= 128 && (REGNO) <= 254 && (REGNO) != 159)
296 #define PR_REGNO_P(REGNO) ((REGNO) >= 256 && (REGNO) <= 319)
297 #define BR_REGNO_P(REGNO) ((REGNO) >= 320 && (REGNO) <= 327)
298 #define GENERAL_REGNO_P(REGNO) \
299 (GR_REGNO_P (REGNO) || (REGNO) == FRAME_POINTER_REGNUM)
300
301 #define GR_REG(REGNO) ((REGNO) + 0)
302 #define FR_REG(REGNO) ((REGNO) + 128)
303 #define PR_REG(REGNO) ((REGNO) + 256)
304 #define BR_REG(REGNO) ((REGNO) + 320)
305 #define OUT_REG(REGNO) ((REGNO) + 120)
306 #define IN_REG(REGNO) ((REGNO) + 112)
307 #define LOC_REG(REGNO) ((REGNO) + 32)
308
309 #define AR_CCV_REGNUM 329
310 #define AR_UNAT_REGNUM 330
311 #define AR_PFS_REGNUM 331
312 #define AR_LC_REGNUM 332
313 #define AR_EC_REGNUM 333
314
315 #define IN_REGNO_P(REGNO) ((REGNO) >= IN_REG (0) && (REGNO) <= IN_REG (7))
316 #define LOC_REGNO_P(REGNO) ((REGNO) >= LOC_REG (0) && (REGNO) <= LOC_REG (79))
317 #define OUT_REGNO_P(REGNO) ((REGNO) >= OUT_REG (0) && (REGNO) <= OUT_REG (7))
318
319 #define AR_M_REGNO_P(REGNO) ((REGNO) == AR_CCV_REGNUM \
320 || (REGNO) == AR_UNAT_REGNUM)
321 #define AR_I_REGNO_P(REGNO) ((REGNO) >= AR_PFS_REGNUM \
322 && (REGNO) < FIRST_PSEUDO_REGISTER)
323 #define AR_REGNO_P(REGNO) ((REGNO) >= AR_CCV_REGNUM \
324 && (REGNO) < FIRST_PSEUDO_REGISTER)
325
326
327 /* ??? Don't really need two sets of macros. I like this one better because
328 it is less typing. */
329 #define R_GR(REGNO) GR_REG (REGNO)
330 #define R_FR(REGNO) FR_REG (REGNO)
331 #define R_PR(REGNO) PR_REG (REGNO)
332 #define R_BR(REGNO) BR_REG (REGNO)
333
334 /* An initializer that says which registers are used for fixed purposes all
335 throughout the compiled code and are therefore not available for general
336 allocation.
337
338 r0: constant 0
339 r1: global pointer (gp)
340 r12: stack pointer (sp)
341 r13: thread pointer (tp)
342 f0: constant 0.0
343 f1: constant 1.0
344 p0: constant true
345 fp: eliminable frame pointer */
346
347 /* The last 16 stacked regs are reserved for the 8 input and 8 output
348 registers. */
349
350 #define FIXED_REGISTERS \
351 { /* General registers. */ \
352 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, \
353 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
354 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
355 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
356 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
357 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
358 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
359 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
360 /* Floating-point registers. */ \
361 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
362 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
363 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
364 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
365 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
366 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
367 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
368 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
369 /* Predicate registers. */ \
370 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
371 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
372 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
373 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
374 /* Branch registers. */ \
375 0, 0, 0, 0, 0, 0, 0, 0, \
376 /*FP CCV UNAT PFS LC EC */ \
377 1, 1, 1, 1, 1, 1 \
378 }
379
380 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered
381 (in general) by function calls as well as for fixed registers. This
382 macro therefore identifies the registers that are not available for
383 general allocation of values that must live across function calls. */
384
385 #define CALL_USED_REGISTERS \
386 { /* General registers. */ \
387 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, \
388 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
389 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
390 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
391 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
392 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
393 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
394 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, \
395 /* Floating-point registers. */ \
396 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
397 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
398 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
399 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
400 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
401 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
402 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
403 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
404 /* Predicate registers. */ \
405 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
406 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
407 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
408 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
409 /* Branch registers. */ \
410 1, 0, 0, 0, 0, 0, 1, 1, \
411 /*FP CCV UNAT PFS LC EC */ \
412 1, 1, 1, 1, 1, 1 \
413 }
414
415 /* Like `CALL_USED_REGISTERS' but used to overcome a historical
416 problem which makes CALL_USED_REGISTERS *always* include
417 all the FIXED_REGISTERS. Until this problem has been
418 resolved this macro can be used to overcome this situation.
419 In particular, block_propagate() requires this list
420 be accurate, or we can remove registers which should be live.
421 This macro is used in regs_invalidated_by_call. */
422
423 #define CALL_REALLY_USED_REGISTERS \
424 { /* General registers. */ \
425 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, \
426 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
427 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
428 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
429 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
430 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
431 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
432 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, \
433 /* Floating-point registers. */ \
434 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
435 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
436 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
437 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
438 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
439 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
440 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
441 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
442 /* Predicate registers. */ \
443 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
444 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
445 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
446 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
447 /* Branch registers. */ \
448 1, 0, 0, 0, 0, 0, 1, 1, \
449 /*FP CCV UNAT PFS LC EC */ \
450 0, 1, 0, 1, 0, 0 \
451 }
452
453
454 /* Define this macro if the target machine has register windows. This C
455 expression returns the register number as seen by the called function
456 corresponding to the register number OUT as seen by the calling function.
457 Return OUT if register number OUT is not an outbound register. */
458
459 #define INCOMING_REGNO(OUT) \
460 ((unsigned) ((OUT) - OUT_REG (0)) < 8 ? IN_REG ((OUT) - OUT_REG (0)) : (OUT))
461
462 /* Define this macro if the target machine has register windows. This C
463 expression returns the register number as seen by the calling function
464 corresponding to the register number IN as seen by the called function.
465 Return IN if register number IN is not an inbound register. */
466
467 #define OUTGOING_REGNO(IN) \
468 ((unsigned) ((IN) - IN_REG (0)) < 8 ? OUT_REG ((IN) - IN_REG (0)) : (IN))
469
470 /* Define this macro if the target machine has register windows. This
471 C expression returns true if the register is call-saved but is in the
472 register window. */
473
474 #define LOCAL_REGNO(REGNO) \
475 (IN_REGNO_P (REGNO) || LOC_REGNO_P (REGNO))
476
477 /* We define CCImode in ia64-modes.def so we need a selector. */
478
479 #define SELECT_CC_MODE(OP,X,Y) CCmode
480 \f
481 /* Order of allocation of registers */
482
483 /* If defined, an initializer for a vector of integers, containing the numbers
484 of hard registers in the order in which GCC should prefer to use them
485 (from most preferred to least).
486
487 If this macro is not defined, registers are used lowest numbered first (all
488 else being equal).
489
490 One use of this macro is on machines where the highest numbered registers
491 must always be saved and the save-multiple-registers instruction supports
492 only sequences of consecutive registers. On such machines, define
493 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
494 allocatable register first. */
495
496 /* ??? Should the GR return value registers come before or after the rest
497 of the caller-save GRs? */
498
499 #define REG_ALLOC_ORDER \
500 { \
501 /* Caller-saved general registers. */ \
502 R_GR (14), R_GR (15), R_GR (16), R_GR (17), \
503 R_GR (18), R_GR (19), R_GR (20), R_GR (21), R_GR (22), R_GR (23), \
504 R_GR (24), R_GR (25), R_GR (26), R_GR (27), R_GR (28), R_GR (29), \
505 R_GR (30), R_GR (31), \
506 /* Output registers. */ \
507 R_GR (120), R_GR (121), R_GR (122), R_GR (123), R_GR (124), R_GR (125), \
508 R_GR (126), R_GR (127), \
509 /* Caller-saved general registers, also used for return values. */ \
510 R_GR (8), R_GR (9), R_GR (10), R_GR (11), \
511 /* addl caller-saved general registers. */ \
512 R_GR (2), R_GR (3), \
513 /* Caller-saved FP registers. */ \
514 R_FR (6), R_FR (7), \
515 /* Caller-saved FP registers, used for parameters and return values. */ \
516 R_FR (8), R_FR (9), R_FR (10), R_FR (11), \
517 R_FR (12), R_FR (13), R_FR (14), R_FR (15), \
518 /* Rotating caller-saved FP registers. */ \
519 R_FR (32), R_FR (33), R_FR (34), R_FR (35), \
520 R_FR (36), R_FR (37), R_FR (38), R_FR (39), R_FR (40), R_FR (41), \
521 R_FR (42), R_FR (43), R_FR (44), R_FR (45), R_FR (46), R_FR (47), \
522 R_FR (48), R_FR (49), R_FR (50), R_FR (51), R_FR (52), R_FR (53), \
523 R_FR (54), R_FR (55), R_FR (56), R_FR (57), R_FR (58), R_FR (59), \
524 R_FR (60), R_FR (61), R_FR (62), R_FR (63), R_FR (64), R_FR (65), \
525 R_FR (66), R_FR (67), R_FR (68), R_FR (69), R_FR (70), R_FR (71), \
526 R_FR (72), R_FR (73), R_FR (74), R_FR (75), R_FR (76), R_FR (77), \
527 R_FR (78), R_FR (79), R_FR (80), R_FR (81), R_FR (82), R_FR (83), \
528 R_FR (84), R_FR (85), R_FR (86), R_FR (87), R_FR (88), R_FR (89), \
529 R_FR (90), R_FR (91), R_FR (92), R_FR (93), R_FR (94), R_FR (95), \
530 R_FR (96), R_FR (97), R_FR (98), R_FR (99), R_FR (100), R_FR (101), \
531 R_FR (102), R_FR (103), R_FR (104), R_FR (105), R_FR (106), R_FR (107), \
532 R_FR (108), R_FR (109), R_FR (110), R_FR (111), R_FR (112), R_FR (113), \
533 R_FR (114), R_FR (115), R_FR (116), R_FR (117), R_FR (118), R_FR (119), \
534 R_FR (120), R_FR (121), R_FR (122), R_FR (123), R_FR (124), R_FR (125), \
535 R_FR (126), R_FR (127), \
536 /* Caller-saved predicate registers. */ \
537 R_PR (6), R_PR (7), R_PR (8), R_PR (9), R_PR (10), R_PR (11), \
538 R_PR (12), R_PR (13), R_PR (14), R_PR (15), \
539 /* Rotating caller-saved predicate registers. */ \
540 R_PR (16), R_PR (17), \
541 R_PR (18), R_PR (19), R_PR (20), R_PR (21), R_PR (22), R_PR (23), \
542 R_PR (24), R_PR (25), R_PR (26), R_PR (27), R_PR (28), R_PR (29), \
543 R_PR (30), R_PR (31), R_PR (32), R_PR (33), R_PR (34), R_PR (35), \
544 R_PR (36), R_PR (37), R_PR (38), R_PR (39), R_PR (40), R_PR (41), \
545 R_PR (42), R_PR (43), R_PR (44), R_PR (45), R_PR (46), R_PR (47), \
546 R_PR (48), R_PR (49), R_PR (50), R_PR (51), R_PR (52), R_PR (53), \
547 R_PR (54), R_PR (55), R_PR (56), R_PR (57), R_PR (58), R_PR (59), \
548 R_PR (60), R_PR (61), R_PR (62), R_PR (63), \
549 /* Caller-saved branch registers. */ \
550 R_BR (6), R_BR (7), \
551 \
552 /* Stacked callee-saved general registers. */ \
553 R_GR (32), R_GR (33), R_GR (34), R_GR (35), \
554 R_GR (36), R_GR (37), R_GR (38), R_GR (39), R_GR (40), R_GR (41), \
555 R_GR (42), R_GR (43), R_GR (44), R_GR (45), R_GR (46), R_GR (47), \
556 R_GR (48), R_GR (49), R_GR (50), R_GR (51), R_GR (52), R_GR (53), \
557 R_GR (54), R_GR (55), R_GR (56), R_GR (57), R_GR (58), R_GR (59), \
558 R_GR (60), R_GR (61), R_GR (62), R_GR (63), R_GR (64), R_GR (65), \
559 R_GR (66), R_GR (67), R_GR (68), R_GR (69), R_GR (70), R_GR (71), \
560 R_GR (72), R_GR (73), R_GR (74), R_GR (75), R_GR (76), R_GR (77), \
561 R_GR (78), R_GR (79), R_GR (80), R_GR (81), R_GR (82), R_GR (83), \
562 R_GR (84), R_GR (85), R_GR (86), R_GR (87), R_GR (88), R_GR (89), \
563 R_GR (90), R_GR (91), R_GR (92), R_GR (93), R_GR (94), R_GR (95), \
564 R_GR (96), R_GR (97), R_GR (98), R_GR (99), R_GR (100), R_GR (101), \
565 R_GR (102), R_GR (103), R_GR (104), R_GR (105), R_GR (106), R_GR (107), \
566 R_GR (108), \
567 /* Input registers. */ \
568 R_GR (112), R_GR (113), R_GR (114), R_GR (115), R_GR (116), R_GR (117), \
569 R_GR (118), R_GR (119), \
570 /* Callee-saved general registers. */ \
571 R_GR (4), R_GR (5), R_GR (6), R_GR (7), \
572 /* Callee-saved FP registers. */ \
573 R_FR (2), R_FR (3), R_FR (4), R_FR (5), R_FR (16), R_FR (17), \
574 R_FR (18), R_FR (19), R_FR (20), R_FR (21), R_FR (22), R_FR (23), \
575 R_FR (24), R_FR (25), R_FR (26), R_FR (27), R_FR (28), R_FR (29), \
576 R_FR (30), R_FR (31), \
577 /* Callee-saved predicate registers. */ \
578 R_PR (1), R_PR (2), R_PR (3), R_PR (4), R_PR (5), \
579 /* Callee-saved branch registers. */ \
580 R_BR (1), R_BR (2), R_BR (3), R_BR (4), R_BR (5), \
581 \
582 /* ??? Stacked registers reserved for fp, rp, and ar.pfs. */ \
583 R_GR (109), R_GR (110), R_GR (111), \
584 \
585 /* Special general registers. */ \
586 R_GR (0), R_GR (1), R_GR (12), R_GR (13), \
587 /* Special FP registers. */ \
588 R_FR (0), R_FR (1), \
589 /* Special predicate registers. */ \
590 R_PR (0), \
591 /* Special branch registers. */ \
592 R_BR (0), \
593 /* Other fixed registers. */ \
594 FRAME_POINTER_REGNUM, \
595 AR_CCV_REGNUM, AR_UNAT_REGNUM, AR_PFS_REGNUM, AR_LC_REGNUM, \
596 AR_EC_REGNUM \
597 }
598 \f
599 /* How Values Fit in Registers */
600
601 /* A C expression for the number of consecutive hard registers, starting at
602 register number REGNO, required to hold a value of mode MODE. */
603
604 /* ??? We say that BImode PR values require two registers. This allows us to
605 easily store the normal and inverted values. We use CCImode to indicate
606 a single predicate register. */
607
608 #define HARD_REGNO_NREGS(REGNO, MODE) \
609 ((REGNO) == PR_REG (0) && (MODE) == DImode ? 64 \
610 : PR_REGNO_P (REGNO) && (MODE) == BImode ? 2 \
611 : (PR_REGNO_P (REGNO) || GR_REGNO_P (REGNO)) && (MODE) == CCImode ? 1\
612 : FR_REGNO_P (REGNO) && (MODE) == XFmode ? 1 \
613 : FR_REGNO_P (REGNO) && (MODE) == RFmode ? 1 \
614 : FR_REGNO_P (REGNO) && (MODE) == XCmode ? 2 \
615 : (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
616
617 /* A C expression that is nonzero if it is permissible to store a value of mode
618 MODE in hard register number REGNO (or in several registers starting with
619 that one). */
620
621 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
622 (FR_REGNO_P (REGNO) ? \
623 GET_MODE_CLASS (MODE) != MODE_CC && \
624 (MODE) != BImode && \
625 (MODE) != TFmode \
626 : PR_REGNO_P (REGNO) ? \
627 (MODE) == BImode || GET_MODE_CLASS (MODE) == MODE_CC \
628 : GR_REGNO_P (REGNO) ? \
629 (MODE) != XFmode && (MODE) != XCmode && (MODE) != RFmode \
630 : AR_REGNO_P (REGNO) ? (MODE) == DImode \
631 : BR_REGNO_P (REGNO) ? (MODE) == DImode \
632 : 0)
633
634 /* A C expression that is nonzero if it is desirable to choose register
635 allocation so as to avoid move instructions between a value of mode MODE1
636 and a value of mode MODE2.
637
638 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
639 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
640 zero. */
641 /* Don't tie integer and FP modes, as that causes us to get integer registers
642 allocated for FP instructions. XFmode only supported in FP registers so
643 we can't tie it with any other modes. */
644 #define MODES_TIEABLE_P(MODE1, MODE2) \
645 (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2) \
646 && ((((MODE1) == XFmode) || ((MODE1) == XCmode) || ((MODE1) == RFmode)) \
647 == (((MODE2) == XFmode) || ((MODE2) == XCmode) || ((MODE2) == RFmode))) \
648 && (((MODE1) == BImode) == ((MODE2) == BImode)))
649
650 /* Specify the modes required to caller save a given hard regno.
651 We need to ensure floating pt regs are not saved as DImode. */
652
653 #define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
654 ((FR_REGNO_P (REGNO) && (NREGS) == 1) ? RFmode \
655 : choose_hard_reg_mode ((REGNO), (NREGS), false))
656 \f
657 /* Handling Leaf Functions */
658
659 /* A C initializer for a vector, indexed by hard register number, which
660 contains 1 for a register that is allowable in a candidate for leaf function
661 treatment. */
662 /* ??? This might be useful. */
663 /* #define LEAF_REGISTERS */
664
665 /* A C expression whose value is the register number to which REGNO should be
666 renumbered, when a function is treated as a leaf function. */
667 /* ??? This might be useful. */
668 /* #define LEAF_REG_REMAP(REGNO) */
669
670 \f
671 /* Register Classes */
672
673 /* An enumeral type that must be defined with all the register class names as
674 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
675 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
676 which is not a register class but rather tells how many classes there
677 are. */
678 /* ??? When compiling without optimization, it is possible for the only use of
679 a pseudo to be a parameter load from the stack with a REG_EQUIV note.
680 Regclass handles this case specially and does not assign any costs to the
681 pseudo. The pseudo then ends up using the last class before ALL_REGS.
682 Thus we must not let either PR_REGS or BR_REGS be the last class. The
683 testcase for this is gcc.c-torture/execute/va-arg-7.c. */
684 enum reg_class
685 {
686 NO_REGS,
687 PR_REGS,
688 BR_REGS,
689 AR_M_REGS,
690 AR_I_REGS,
691 ADDL_REGS,
692 GR_REGS,
693 FP_REGS,
694 FR_REGS,
695 GR_AND_BR_REGS,
696 GR_AND_FR_REGS,
697 ALL_REGS,
698 LIM_REG_CLASSES
699 };
700
701 #define GENERAL_REGS GR_REGS
702
703 /* The number of distinct register classes. */
704 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
705
706 /* An initializer containing the names of the register classes as C string
707 constants. These names are used in writing some of the debugging dumps. */
708 #define REG_CLASS_NAMES \
709 { "NO_REGS", "PR_REGS", "BR_REGS", "AR_M_REGS", "AR_I_REGS", \
710 "ADDL_REGS", "GR_REGS", "FP_REGS", "FR_REGS", \
711 "GR_AND_BR_REGS", "GR_AND_FR_REGS", "ALL_REGS" }
712
713 /* An initializer containing the contents of the register classes, as integers
714 which are bit masks. The Nth integer specifies the contents of class N.
715 The way the integer MASK is interpreted is that register R is in the class
716 if `MASK & (1 << R)' is 1. */
717 #define REG_CLASS_CONTENTS \
718 { \
719 /* NO_REGS. */ \
720 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
721 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
722 0x00000000, 0x00000000, 0x0000 }, \
723 /* PR_REGS. */ \
724 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
725 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
726 0xFFFFFFFF, 0xFFFFFFFF, 0x0000 }, \
727 /* BR_REGS. */ \
728 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
729 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
730 0x00000000, 0x00000000, 0x00FF }, \
731 /* AR_M_REGS. */ \
732 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
733 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
734 0x00000000, 0x00000000, 0x0600 }, \
735 /* AR_I_REGS. */ \
736 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
737 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
738 0x00000000, 0x00000000, 0x3800 }, \
739 /* ADDL_REGS. */ \
740 { 0x0000000F, 0x00000000, 0x00000000, 0x00000000, \
741 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
742 0x00000000, 0x00000000, 0x0000 }, \
743 /* GR_REGS. */ \
744 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
745 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
746 0x00000000, 0x00000000, 0x0100 }, \
747 /* FP_REGS. */ \
748 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
749 0x7FFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x7FFFFFFF, \
750 0x00000000, 0x00000000, 0x0000 }, \
751 /* FR_REGS. */ \
752 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
753 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
754 0x00000000, 0x00000000, 0x0000 }, \
755 /* GR_AND_BR_REGS. */ \
756 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
757 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
758 0x00000000, 0x00000000, 0x01FF }, \
759 /* GR_AND_FR_REGS. */ \
760 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
761 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
762 0x00000000, 0x00000000, 0x0100 }, \
763 /* ALL_REGS. */ \
764 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
765 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
766 0xFFFFFFFF, 0xFFFFFFFF, 0x3FFF }, \
767 }
768
769 /* A C expression whose value is a register class containing hard register
770 REGNO. In general there is more than one such class; choose a class which
771 is "minimal", meaning that no smaller class also contains the register. */
772 /* The NO_REGS case is primarily for the benefit of rws_access_reg, which
773 may call here with private (invalid) register numbers, such as
774 REG_VOLATILE. */
775 #define REGNO_REG_CLASS(REGNO) \
776 (ADDL_REGNO_P (REGNO) ? ADDL_REGS \
777 : GENERAL_REGNO_P (REGNO) ? GR_REGS \
778 : FR_REGNO_P (REGNO) ? (REGNO) != R_FR (31) \
779 && (REGNO) != R_FR(127) ? FP_REGS : FR_REGS \
780 : PR_REGNO_P (REGNO) ? PR_REGS \
781 : BR_REGNO_P (REGNO) ? BR_REGS \
782 : AR_M_REGNO_P (REGNO) ? AR_M_REGS \
783 : AR_I_REGNO_P (REGNO) ? AR_I_REGS \
784 : NO_REGS)
785
786 /* A macro whose definition is the name of the class to which a valid base
787 register must belong. A base register is one used in an address which is
788 the register value plus a displacement. */
789 #define BASE_REG_CLASS GENERAL_REGS
790
791 /* A macro whose definition is the name of the class to which a valid index
792 register must belong. An index register is one used in an address where its
793 value is either multiplied by a scale factor or added to another register
794 (as well as added to a displacement). This is needed for POST_MODIFY. */
795 #define INDEX_REG_CLASS GENERAL_REGS
796
797 /* A C expression which is nonzero if register number NUM is suitable for use
798 as a base register in operand addresses. It may be either a suitable hard
799 register or a pseudo register that has been allocated such a hard reg. */
800 #define REGNO_OK_FOR_BASE_P(REGNO) \
801 (GENERAL_REGNO_P (REGNO) || GENERAL_REGNO_P (reg_renumber[REGNO]))
802
803 /* A C expression which is nonzero if register number NUM is suitable for use
804 as an index register in operand addresses. It may be either a suitable hard
805 register or a pseudo register that has been allocated such a hard reg.
806 This is needed for POST_MODIFY. */
807 #define REGNO_OK_FOR_INDEX_P(NUM) REGNO_OK_FOR_BASE_P (NUM)
808
809 /* You should define this macro to indicate to the reload phase that it may
810 need to allocate at least one register for a reload in addition to the
811 register to contain the data. Specifically, if copying X to a register
812 CLASS in MODE requires an intermediate register, you should define this
813 to return the largest register class all of whose registers can be used
814 as intermediate registers or scratch registers. */
815
816 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
817 ia64_secondary_reload_class (CLASS, MODE, X)
818
819 /* Certain machines have the property that some registers cannot be copied to
820 some other registers without using memory. Define this macro on those
821 machines to be a C expression that is nonzero if objects of mode M in
822 registers of CLASS1 can only be copied to registers of class CLASS2 by
823 storing a register of CLASS1 into memory and loading that memory location
824 into a register of CLASS2. */
825
826 #if 0
827 /* ??? May need this, but since we've disallowed XFmode in GR_REGS,
828 I'm not quite sure how it could be invoked. The normal problems
829 with unions should be solved with the addressof fiddling done by
830 movxf and friends. */
831 #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \
832 (((MODE) == XFmode || (MODE) == XCmode) \
833 && (((CLASS1) == GR_REGS && (CLASS2) == FR_REGS) \
834 || ((CLASS1) == FR_REGS && (CLASS2) == GR_REGS)))
835 #endif
836
837 /* A C expression for the maximum number of consecutive registers of
838 class CLASS needed to hold a value of mode MODE.
839 This is closely related to the macro `HARD_REGNO_NREGS'. */
840
841 #define CLASS_MAX_NREGS(CLASS, MODE) \
842 ((MODE) == BImode && (CLASS) == PR_REGS ? 2 \
843 : (((CLASS) == FR_REGS || (CLASS) == FP_REGS) && (MODE) == XFmode) ? 1 \
844 : (((CLASS) == FR_REGS || (CLASS) == FP_REGS) && (MODE) == RFmode) ? 1 \
845 : (((CLASS) == FR_REGS || (CLASS) == FP_REGS) && (MODE) == XCmode) ? 2 \
846 : (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
847
848 /* In BR regs, we can't change the DImode at all.
849 In FP regs, we can't change FP values to integer values and vice versa,
850 but we can change e.g. DImode to SImode, and V2SFmode into DImode. */
851
852 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
853 (reg_classes_intersect_p (CLASS, BR_REGS) \
854 ? (FROM) != (TO) \
855 : (SCALAR_FLOAT_MODE_P (FROM) != SCALAR_FLOAT_MODE_P (TO) \
856 ? reg_classes_intersect_p (CLASS, FR_REGS) \
857 : 0))
858 \f
859 /* Basic Stack Layout */
860
861 /* Define this macro if pushing a word onto the stack moves the stack pointer
862 to a smaller address. */
863 #define STACK_GROWS_DOWNWARD 1
864
865 /* Define this macro to nonzero if the addresses of local variable slots
866 are at negative offsets from the frame pointer. */
867 #define FRAME_GROWS_DOWNWARD 0
868
869 /* Offset from the frame pointer to the first local variable slot to
870 be allocated. */
871 #define STARTING_FRAME_OFFSET 0
872
873 /* Offset from the stack pointer register to the first location at which
874 outgoing arguments are placed. If not specified, the default value of zero
875 is used. This is the proper value for most machines. */
876 /* IA64 has a 16 byte scratch area that is at the bottom of the stack. */
877 #define STACK_POINTER_OFFSET 16
878
879 /* Offset from the argument pointer register to the first argument's address.
880 On some machines it may depend on the data type of the function. */
881 #define FIRST_PARM_OFFSET(FUNDECL) 0
882
883 /* A C expression whose value is RTL representing the value of the return
884 address for the frame COUNT steps up from the current frame, after the
885 prologue. */
886
887 /* ??? Frames other than zero would likely require interpreting the frame
888 unwind info, so we don't try to support them. We would also need to define
889 DYNAMIC_CHAIN_ADDRESS and SETUP_FRAME_ADDRESS (for the reg stack flush). */
890
891 #define RETURN_ADDR_RTX(COUNT, FRAME) \
892 ia64_return_addr_rtx (COUNT, FRAME)
893
894 /* A C expression whose value is RTL representing the location of the incoming
895 return address at the beginning of any function, before the prologue. This
896 RTL is either a `REG', indicating that the return value is saved in `REG',
897 or a `MEM' representing a location in the stack. This enables DWARF2
898 unwind info for C++ EH. */
899 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, BR_REG (0))
900
901 /* A C expression whose value is an integer giving the offset, in bytes, from
902 the value of the stack pointer register to the top of the stack frame at the
903 beginning of any function, before the prologue. The top of the frame is
904 defined to be the value of the stack pointer in the previous frame, just
905 before the call instruction. */
906 /* The CFA is past the red zone, not at the entry-point stack
907 pointer. */
908 #define INCOMING_FRAME_SP_OFFSET STACK_POINTER_OFFSET
909
910 /* We shorten debug info by using CFA-16 as DW_AT_frame_base. */
911 #define CFA_FRAME_BASE_OFFSET(FUNDECL) (-INCOMING_FRAME_SP_OFFSET)
912
913 \f
914 /* Register That Address the Stack Frame. */
915
916 /* The register number of the stack pointer register, which must also be a
917 fixed register according to `FIXED_REGISTERS'. On most machines, the
918 hardware determines which register this is. */
919
920 #define STACK_POINTER_REGNUM 12
921
922 /* The register number of the frame pointer register, which is used to access
923 automatic variables in the stack frame. On some machines, the hardware
924 determines which register this is. On other machines, you can choose any
925 register you wish for this purpose. */
926
927 #define FRAME_POINTER_REGNUM 328
928
929 /* Base register for access to local variables of the function. */
930 #define HARD_FRAME_POINTER_REGNUM LOC_REG (79)
931
932 /* The register number of the arg pointer register, which is used to access the
933 function's argument list. */
934 /* r0 won't otherwise be used, so put the always eliminated argument pointer
935 in it. */
936 #define ARG_POINTER_REGNUM R_GR(0)
937
938 /* Due to the way varargs and argument spilling happens, the argument
939 pointer is not 16-byte aligned like the stack pointer. */
940 #define INIT_EXPANDERS \
941 do { \
942 ia64_init_expanders (); \
943 if (crtl->emit.regno_pointer_align) \
944 REGNO_POINTER_ALIGN (ARG_POINTER_REGNUM) = 64; \
945 } while (0)
946
947 /* Register numbers used for passing a function's static chain pointer. */
948 /* ??? The ABI sez the static chain should be passed as a normal parameter. */
949 #define STATIC_CHAIN_REGNUM 15
950 \f
951 /* Eliminating the Frame Pointer and the Arg Pointer */
952
953 /* If defined, this macro specifies a table of register pairs used to eliminate
954 unneeded registers that point into the stack frame. */
955
956 #define ELIMINABLE_REGS \
957 { \
958 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
959 {ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
960 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
961 {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
962 }
963
964 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
965 specifies the initial difference between the specified pair of
966 registers. This macro must be defined if `ELIMINABLE_REGS' is
967 defined. */
968 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
969 ((OFFSET) = ia64_initial_elimination_offset ((FROM), (TO)))
970 \f
971 /* Passing Function Arguments on the Stack */
972
973 /* If defined, the maximum amount of space required for outgoing arguments will
974 be computed and placed into the variable
975 `crtl->outgoing_args_size'. */
976
977 #define ACCUMULATE_OUTGOING_ARGS 1
978
979 \f
980 /* Function Arguments in Registers */
981
982 #define MAX_ARGUMENT_SLOTS 8
983 #define MAX_INT_RETURN_SLOTS 4
984 #define GR_ARG_FIRST IN_REG (0)
985 #define GR_RET_FIRST GR_REG (8)
986 #define GR_RET_LAST GR_REG (11)
987 #define FR_ARG_FIRST FR_REG (8)
988 #define FR_RET_FIRST FR_REG (8)
989 #define FR_RET_LAST FR_REG (15)
990 #define AR_ARG_FIRST OUT_REG (0)
991
992 /* A C type for declaring a variable that is used as the first argument of
993 `FUNCTION_ARG' and other related values. For some target machines, the type
994 `int' suffices and can hold the number of bytes of argument so far. */
995
996 enum ivms_arg_type {I64, FF, FD, FG, FS, FT};
997 /* VMS floating point formats VAX F, VAX D, VAX G, IEEE S, IEEE T. */
998
999 typedef struct ia64_args
1000 {
1001 int words; /* # words of arguments so far */
1002 int int_regs; /* # GR registers used so far */
1003 int fp_regs; /* # FR registers used so far */
1004 int prototype; /* whether function prototyped */
1005 enum ivms_arg_type atypes[8]; /* which VMS float type or if not float */
1006 } CUMULATIVE_ARGS;
1007
1008 /* A C statement (sans semicolon) for initializing the variable CUM for the
1009 state at the beginning of the argument list. */
1010
1011 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
1012 do { \
1013 (CUM).words = 0; \
1014 (CUM).int_regs = 0; \
1015 (CUM).fp_regs = 0; \
1016 (CUM).prototype = ((FNTYPE) && prototype_p (FNTYPE)) || (LIBNAME); \
1017 (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \
1018 (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64; \
1019 (CUM).atypes[6] = (CUM).atypes[7] = I64; \
1020 } while (0)
1021
1022 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
1023 arguments for the function being compiled. If this macro is undefined,
1024 `INIT_CUMULATIVE_ARGS' is used instead. */
1025
1026 /* We set prototype to true so that we never try to return a PARALLEL from
1027 function_arg. */
1028 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
1029 do { \
1030 (CUM).words = 0; \
1031 (CUM).int_regs = 0; \
1032 (CUM).fp_regs = 0; \
1033 (CUM).prototype = 1; \
1034 (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \
1035 (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64; \
1036 (CUM).atypes[6] = (CUM).atypes[7] = I64; \
1037 } while (0)
1038
1039 /* A C expression that is nonzero if REGNO is the number of a hard register in
1040 which function arguments are sometimes passed. This does *not* include
1041 implicit arguments such as the static chain and the structure-value address.
1042 On many machines, no registers can be used for this purpose since all
1043 function arguments are pushed on the stack. */
1044 #define FUNCTION_ARG_REGNO_P(REGNO) \
1045 (((REGNO) >= AR_ARG_FIRST && (REGNO) < (AR_ARG_FIRST + MAX_ARGUMENT_SLOTS)) \
1046 || ((REGNO) >= FR_ARG_FIRST && (REGNO) < (FR_ARG_FIRST + MAX_ARGUMENT_SLOTS)))
1047
1048 \f
1049 /* How Large Values are Returned */
1050
1051 #define DEFAULT_PCC_STRUCT_RETURN 0
1052
1053 \f
1054 /* Caller-Saves Register Allocation */
1055
1056 /* A C expression to determine whether it is worthwhile to consider placing a
1057 pseudo-register in a call-clobbered hard register and saving and restoring
1058 it around each function call. The expression should be 1 when this is worth
1059 doing, and 0 otherwise.
1060
1061 If you don't define this macro, a default is used which is good on most
1062 machines: `4 * CALLS < REFS'. */
1063 /* ??? Investigate. */
1064 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
1065
1066 \f
1067 /* Function Entry and Exit */
1068
1069 /* Define this macro as a C expression that is nonzero if the return
1070 instruction or the function epilogue ignores the value of the stack pointer;
1071 in other words, if it is safe to delete an instruction to adjust the stack
1072 pointer before a return from the function. */
1073
1074 #define EXIT_IGNORE_STACK 1
1075
1076 /* Define this macro as a C expression that is nonzero for registers
1077 used by the epilogue or the `return' pattern. */
1078
1079 #define EPILOGUE_USES(REGNO) ia64_epilogue_uses (REGNO)
1080
1081 /* Nonzero for registers used by the exception handling mechanism. */
1082
1083 #define EH_USES(REGNO) ia64_eh_uses (REGNO)
1084
1085 /* Output part N of a function descriptor for DECL. For ia64, both
1086 words are emitted with a single relocation, so ignore N > 0. */
1087 #define ASM_OUTPUT_FDESC(FILE, DECL, PART) \
1088 do { \
1089 if ((PART) == 0) \
1090 { \
1091 if (TARGET_ILP32) \
1092 fputs ("\tdata8.ua @iplt(", FILE); \
1093 else \
1094 fputs ("\tdata16.ua @iplt(", FILE); \
1095 mark_decl_referenced (DECL); \
1096 assemble_name (FILE, XSTR (XEXP (DECL_RTL (DECL), 0), 0)); \
1097 fputs (")\n", FILE); \
1098 if (TARGET_ILP32) \
1099 fputs ("\tdata8.ua 0\n", FILE); \
1100 } \
1101 } while (0)
1102 \f
1103 /* Generating Code for Profiling. */
1104
1105 /* A C statement or compound statement to output to FILE some assembler code to
1106 call the profiling subroutine `mcount'. */
1107
1108 #undef FUNCTION_PROFILER
1109 #define FUNCTION_PROFILER(FILE, LABELNO) \
1110 ia64_output_function_profiler(FILE, LABELNO)
1111
1112 /* Neither hpux nor linux use profile counters. */
1113 #define NO_PROFILE_COUNTERS 1
1114 \f
1115 /* Trampolines for Nested Functions. */
1116
1117 /* We need 32 bytes, so we can save the sp, ar.rnat, ar.bsp, and ar.pfs of
1118 the function containing a non-local goto target. */
1119
1120 #define STACK_SAVEAREA_MODE(LEVEL) \
1121 ((LEVEL) == SAVE_NONLOCAL ? OImode : Pmode)
1122
1123 /* A C expression for the size in bytes of the trampoline, as an integer. */
1124
1125 #define TRAMPOLINE_SIZE 32
1126
1127 /* Alignment required for trampolines, in bits. */
1128
1129 #define TRAMPOLINE_ALIGNMENT 64
1130 \f
1131 /* Addressing Modes */
1132
1133 /* Define this macro if the machine supports post-increment addressing. */
1134
1135 #define HAVE_POST_INCREMENT 1
1136 #define HAVE_POST_DECREMENT 1
1137 #define HAVE_POST_MODIFY_DISP 1
1138 #define HAVE_POST_MODIFY_REG 1
1139
1140 /* A C expression that is 1 if the RTX X is a constant which is a valid
1141 address. */
1142
1143 #define CONSTANT_ADDRESS_P(X) 0
1144
1145 /* The max number of registers that can appear in a valid memory address. */
1146
1147 #define MAX_REGS_PER_ADDRESS 2
1148
1149 \f
1150 /* Condition Code Status */
1151
1152 /* One some machines not all possible comparisons are defined, but you can
1153 convert an invalid comparison into a valid one. */
1154 /* ??? Investigate. See the alpha definition. */
1155 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
1156
1157 \f
1158 /* Describing Relative Costs of Operations */
1159
1160 /* A C expression for the cost of a branch instruction. A value of 1 is the
1161 default; other values are interpreted relative to that. Used by the
1162 if-conversion code as max instruction count. */
1163 /* ??? This requires investigation. The primary effect might be how
1164 many additional insn groups we run into, vs how good the dynamic
1165 branch predictor is. */
1166
1167 #define BRANCH_COST(speed_p, predictable_p) 6
1168
1169 /* Define this macro as a C expression which is nonzero if accessing less than
1170 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
1171 word of memory. */
1172
1173 #define SLOW_BYTE_ACCESS 1
1174
1175 /* Define this macro if it is as good or better to call a constant function
1176 address than to call an address kept in a register.
1177
1178 Indirect function calls are more expensive that direct function calls, so
1179 don't cse function addresses. */
1180
1181 #define NO_FUNCTION_CSE 1
1182
1183 \f
1184 /* Dividing the output into sections. */
1185
1186 /* A C expression whose value is a string containing the assembler operation
1187 that should precede instructions and read-only data. */
1188
1189 #define TEXT_SECTION_ASM_OP "\t.text"
1190
1191 /* A C expression whose value is a string containing the assembler operation to
1192 identify the following data as writable initialized data. */
1193
1194 #define DATA_SECTION_ASM_OP "\t.data"
1195
1196 /* If defined, a C expression whose value is a string containing the assembler
1197 operation to identify the following data as uninitialized global data. */
1198
1199 #define BSS_SECTION_ASM_OP "\t.bss"
1200
1201 #define IA64_DEFAULT_GVALUE 8
1202 \f
1203 /* Position Independent Code. */
1204
1205 /* The register number of the register used to address a table of static data
1206 addresses in memory. */
1207
1208 /* ??? Should modify ia64.md to use pic_offset_table_rtx instead of
1209 gen_rtx_REG (DImode, 1). */
1210
1211 /* ??? Should we set flag_pic? Probably need to define
1212 LEGITIMIZE_PIC_OPERAND_P to make that work. */
1213
1214 #define PIC_OFFSET_TABLE_REGNUM GR_REG (1)
1215
1216 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
1217 clobbered by calls. */
1218
1219 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 1
1220
1221 \f
1222 /* The Overall Framework of an Assembler File. */
1223
1224 /* A C string constant describing how to begin a comment in the target
1225 assembler language. The compiler assumes that the comment will end at the
1226 end of the line. */
1227
1228 #define ASM_COMMENT_START "//"
1229
1230 /* A C string constant for text to be output before each `asm' statement or
1231 group of consecutive ones. */
1232
1233 #define ASM_APP_ON (TARGET_GNU_AS ? "#APP\n" : "//APP\n")
1234
1235 /* A C string constant for text to be output after each `asm' statement or
1236 group of consecutive ones. */
1237
1238 #define ASM_APP_OFF (TARGET_GNU_AS ? "#NO_APP\n" : "//NO_APP\n")
1239 \f
1240 /* Output and Generation of Labels. */
1241
1242 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
1243 assembler definition of a label named NAME. */
1244
1245 /* See the ASM_OUTPUT_LABELREF definition in sysv4.h for an explanation of
1246 why ia64_asm_output_label exists. */
1247
1248 extern int ia64_asm_output_label;
1249 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
1250 do { \
1251 ia64_asm_output_label = 1; \
1252 assemble_name (STREAM, NAME); \
1253 fputs (":\n", STREAM); \
1254 ia64_asm_output_label = 0; \
1255 } while (0)
1256
1257 /* Globalizing directive for a label. */
1258 #define GLOBAL_ASM_OP "\t.global "
1259
1260 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
1261 necessary for declaring the name of an external symbol named NAME which is
1262 referenced in this compilation but not defined. */
1263
1264 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
1265 ia64_asm_output_external (FILE, DECL, NAME)
1266
1267 /* A C statement to store into the string STRING a label whose name is made
1268 from the string PREFIX and the number NUM. */
1269
1270 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
1271 do { \
1272 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
1273 } while (0)
1274
1275 /* ??? Not sure if using a ? in the name for Intel as is safe. */
1276
1277 #define ASM_PN_FORMAT (TARGET_GNU_AS ? "%s.%lu" : "%s?%lu")
1278
1279 /* A C statement to output to the stdio stream STREAM assembler code which
1280 defines (equates) the symbol NAME to have the value VALUE. */
1281
1282 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
1283 do { \
1284 assemble_name (STREAM, NAME); \
1285 fputs (" = ", STREAM); \
1286 if (ISDIGIT (*VALUE)) \
1287 ia64_asm_output_label = 1; \
1288 assemble_name (STREAM, VALUE); \
1289 fputc ('\n', STREAM); \
1290 ia64_asm_output_label = 0; \
1291 } while (0)
1292
1293 \f
1294 /* Macros Controlling Initialization Routines. */
1295
1296 /* This is handled by sysv4.h. */
1297
1298 \f
1299 /* Output of Assembler Instructions. */
1300
1301 /* A C initializer containing the assembler's names for the machine registers,
1302 each one as a C string constant. */
1303
1304 #define REGISTER_NAMES \
1305 { \
1306 /* General registers. */ \
1307 "ap", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", \
1308 "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", \
1309 "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", \
1310 "r30", "r31", \
1311 /* Local registers. */ \
1312 "loc0", "loc1", "loc2", "loc3", "loc4", "loc5", "loc6", "loc7", \
1313 "loc8", "loc9", "loc10","loc11","loc12","loc13","loc14","loc15", \
1314 "loc16","loc17","loc18","loc19","loc20","loc21","loc22","loc23", \
1315 "loc24","loc25","loc26","loc27","loc28","loc29","loc30","loc31", \
1316 "loc32","loc33","loc34","loc35","loc36","loc37","loc38","loc39", \
1317 "loc40","loc41","loc42","loc43","loc44","loc45","loc46","loc47", \
1318 "loc48","loc49","loc50","loc51","loc52","loc53","loc54","loc55", \
1319 "loc56","loc57","loc58","loc59","loc60","loc61","loc62","loc63", \
1320 "loc64","loc65","loc66","loc67","loc68","loc69","loc70","loc71", \
1321 "loc72","loc73","loc74","loc75","loc76","loc77","loc78","loc79", \
1322 /* Input registers. */ \
1323 "in0", "in1", "in2", "in3", "in4", "in5", "in6", "in7", \
1324 /* Output registers. */ \
1325 "out0", "out1", "out2", "out3", "out4", "out5", "out6", "out7", \
1326 /* Floating-point registers. */ \
1327 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", \
1328 "f10", "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19", \
1329 "f20", "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29", \
1330 "f30", "f31", "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39", \
1331 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47", "f48", "f49", \
1332 "f50", "f51", "f52", "f53", "f54", "f55", "f56", "f57", "f58", "f59", \
1333 "f60", "f61", "f62", "f63", "f64", "f65", "f66", "f67", "f68", "f69", \
1334 "f70", "f71", "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79", \
1335 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87", "f88", "f89", \
1336 "f90", "f91", "f92", "f93", "f94", "f95", "f96", "f97", "f98", "f99", \
1337 "f100","f101","f102","f103","f104","f105","f106","f107","f108","f109",\
1338 "f110","f111","f112","f113","f114","f115","f116","f117","f118","f119",\
1339 "f120","f121","f122","f123","f124","f125","f126","f127", \
1340 /* Predicate registers. */ \
1341 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7", "p8", "p9", \
1342 "p10", "p11", "p12", "p13", "p14", "p15", "p16", "p17", "p18", "p19", \
1343 "p20", "p21", "p22", "p23", "p24", "p25", "p26", "p27", "p28", "p29", \
1344 "p30", "p31", "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39", \
1345 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47", "p48", "p49", \
1346 "p50", "p51", "p52", "p53", "p54", "p55", "p56", "p57", "p58", "p59", \
1347 "p60", "p61", "p62", "p63", \
1348 /* Branch registers. */ \
1349 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", \
1350 /* Frame pointer. Application registers. */ \
1351 "sfp", "ar.ccv", "ar.unat", "ar.pfs", "ar.lc", "ar.ec", \
1352 }
1353
1354 /* If defined, a C initializer for an array of structures containing a name and
1355 a register number. This macro defines additional names for hard registers,
1356 thus allowing the `asm' option in declarations to refer to registers using
1357 alternate names. */
1358
1359 #define ADDITIONAL_REGISTER_NAMES \
1360 { \
1361 { "gp", R_GR (1) }, \
1362 { "sp", R_GR (12) }, \
1363 { "in0", IN_REG (0) }, \
1364 { "in1", IN_REG (1) }, \
1365 { "in2", IN_REG (2) }, \
1366 { "in3", IN_REG (3) }, \
1367 { "in4", IN_REG (4) }, \
1368 { "in5", IN_REG (5) }, \
1369 { "in6", IN_REG (6) }, \
1370 { "in7", IN_REG (7) }, \
1371 { "out0", OUT_REG (0) }, \
1372 { "out1", OUT_REG (1) }, \
1373 { "out2", OUT_REG (2) }, \
1374 { "out3", OUT_REG (3) }, \
1375 { "out4", OUT_REG (4) }, \
1376 { "out5", OUT_REG (5) }, \
1377 { "out6", OUT_REG (6) }, \
1378 { "out7", OUT_REG (7) }, \
1379 { "loc0", LOC_REG (0) }, \
1380 { "loc1", LOC_REG (1) }, \
1381 { "loc2", LOC_REG (2) }, \
1382 { "loc3", LOC_REG (3) }, \
1383 { "loc4", LOC_REG (4) }, \
1384 { "loc5", LOC_REG (5) }, \
1385 { "loc6", LOC_REG (6) }, \
1386 { "loc7", LOC_REG (7) }, \
1387 { "loc8", LOC_REG (8) }, \
1388 { "loc9", LOC_REG (9) }, \
1389 { "loc10", LOC_REG (10) }, \
1390 { "loc11", LOC_REG (11) }, \
1391 { "loc12", LOC_REG (12) }, \
1392 { "loc13", LOC_REG (13) }, \
1393 { "loc14", LOC_REG (14) }, \
1394 { "loc15", LOC_REG (15) }, \
1395 { "loc16", LOC_REG (16) }, \
1396 { "loc17", LOC_REG (17) }, \
1397 { "loc18", LOC_REG (18) }, \
1398 { "loc19", LOC_REG (19) }, \
1399 { "loc20", LOC_REG (20) }, \
1400 { "loc21", LOC_REG (21) }, \
1401 { "loc22", LOC_REG (22) }, \
1402 { "loc23", LOC_REG (23) }, \
1403 { "loc24", LOC_REG (24) }, \
1404 { "loc25", LOC_REG (25) }, \
1405 { "loc26", LOC_REG (26) }, \
1406 { "loc27", LOC_REG (27) }, \
1407 { "loc28", LOC_REG (28) }, \
1408 { "loc29", LOC_REG (29) }, \
1409 { "loc30", LOC_REG (30) }, \
1410 { "loc31", LOC_REG (31) }, \
1411 { "loc32", LOC_REG (32) }, \
1412 { "loc33", LOC_REG (33) }, \
1413 { "loc34", LOC_REG (34) }, \
1414 { "loc35", LOC_REG (35) }, \
1415 { "loc36", LOC_REG (36) }, \
1416 { "loc37", LOC_REG (37) }, \
1417 { "loc38", LOC_REG (38) }, \
1418 { "loc39", LOC_REG (39) }, \
1419 { "loc40", LOC_REG (40) }, \
1420 { "loc41", LOC_REG (41) }, \
1421 { "loc42", LOC_REG (42) }, \
1422 { "loc43", LOC_REG (43) }, \
1423 { "loc44", LOC_REG (44) }, \
1424 { "loc45", LOC_REG (45) }, \
1425 { "loc46", LOC_REG (46) }, \
1426 { "loc47", LOC_REG (47) }, \
1427 { "loc48", LOC_REG (48) }, \
1428 { "loc49", LOC_REG (49) }, \
1429 { "loc50", LOC_REG (50) }, \
1430 { "loc51", LOC_REG (51) }, \
1431 { "loc52", LOC_REG (52) }, \
1432 { "loc53", LOC_REG (53) }, \
1433 { "loc54", LOC_REG (54) }, \
1434 { "loc55", LOC_REG (55) }, \
1435 { "loc56", LOC_REG (56) }, \
1436 { "loc57", LOC_REG (57) }, \
1437 { "loc58", LOC_REG (58) }, \
1438 { "loc59", LOC_REG (59) }, \
1439 { "loc60", LOC_REG (60) }, \
1440 { "loc61", LOC_REG (61) }, \
1441 { "loc62", LOC_REG (62) }, \
1442 { "loc63", LOC_REG (63) }, \
1443 { "loc64", LOC_REG (64) }, \
1444 { "loc65", LOC_REG (65) }, \
1445 { "loc66", LOC_REG (66) }, \
1446 { "loc67", LOC_REG (67) }, \
1447 { "loc68", LOC_REG (68) }, \
1448 { "loc69", LOC_REG (69) }, \
1449 { "loc70", LOC_REG (70) }, \
1450 { "loc71", LOC_REG (71) }, \
1451 { "loc72", LOC_REG (72) }, \
1452 { "loc73", LOC_REG (73) }, \
1453 { "loc74", LOC_REG (74) }, \
1454 { "loc75", LOC_REG (75) }, \
1455 { "loc76", LOC_REG (76) }, \
1456 { "loc77", LOC_REG (77) }, \
1457 { "loc78", LOC_REG (78) }, \
1458 { "loc79", LOC_REG (79) }, \
1459 }
1460
1461 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
1462 `%I' options of `asm_fprintf' (see `final.c'). */
1463
1464 #define REGISTER_PREFIX ""
1465 #define LOCAL_LABEL_PREFIX "."
1466 #define USER_LABEL_PREFIX ""
1467 #define IMMEDIATE_PREFIX ""
1468
1469 \f
1470 /* Output of dispatch tables. */
1471
1472 /* This macro should be provided on machines where the addresses in a dispatch
1473 table are relative to the table's own address. */
1474
1475 /* ??? Depends on the pointer size. */
1476
1477 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1478 do { \
1479 if (CASE_VECTOR_MODE == SImode) \
1480 fprintf (STREAM, "\tdata4 @pcrel(.L%d)\n", VALUE); \
1481 else \
1482 fprintf (STREAM, "\tdata8 @pcrel(.L%d)\n", VALUE); \
1483 } while (0)
1484
1485 /* Jump tables only need 4 or 8 byte alignment. */
1486
1487 #define ADDR_VEC_ALIGN(ADDR_VEC) (CASE_VECTOR_MODE == SImode ? 2 : 3)
1488
1489 \f
1490 /* Assembler Commands for Exception Regions. */
1491
1492 /* Select a format to encode pointers in exception handling data. CODE
1493 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
1494 true if the symbol may be affected by dynamic relocations. */
1495 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
1496 (((CODE) == 1 ? DW_EH_PE_textrel : DW_EH_PE_datarel) \
1497 | ((GLOBAL) ? DW_EH_PE_indirect : 0) \
1498 | (TARGET_ILP32 ? DW_EH_PE_udata4 : DW_EH_PE_udata8))
1499
1500 /* Handle special EH pointer encodings. Absolute, pc-relative, and
1501 indirect are handled automatically. */
1502 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
1503 do { \
1504 const char *reltag = NULL; \
1505 if (((ENCODING) & 0xF0) == DW_EH_PE_textrel) \
1506 reltag = "@segrel("; \
1507 else if (((ENCODING) & 0xF0) == DW_EH_PE_datarel) \
1508 reltag = "@gprel("; \
1509 if (reltag) \
1510 { \
1511 fputs (integer_asm_op (SIZE, FALSE), FILE); \
1512 fputs (reltag, FILE); \
1513 assemble_name (FILE, XSTR (ADDR, 0)); \
1514 fputc (')', FILE); \
1515 goto DONE; \
1516 } \
1517 } while (0)
1518
1519 \f
1520 /* Assembler Commands for Alignment. */
1521
1522 /* ??? Investigate. */
1523
1524 /* The alignment (log base 2) to put in front of LABEL, which follows
1525 a BARRIER. */
1526
1527 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
1528
1529 /* The desired alignment for the location counter at the beginning
1530 of a loop. */
1531
1532 /* #define LOOP_ALIGN(LABEL) */
1533
1534 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
1535 section because it fails put zeros in the bytes that are skipped. */
1536
1537 #define ASM_NO_SKIP_IN_TEXT 1
1538
1539 /* A C statement to output to the stdio stream STREAM an assembler command to
1540 advance the location counter to a multiple of 2 to the POWER bytes. */
1541
1542 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1543 fprintf (STREAM, "\t.align %d\n", 1<<(POWER))
1544
1545 \f
1546 /* Macros Affecting all Debug Formats. */
1547
1548 /* This is handled in sysv4.h. */
1549
1550 \f
1551 /* Specific Options for DBX Output. */
1552
1553 /* This is handled by dbxelf.h. */
1554
1555 \f
1556 /* Open ended Hooks for DBX Output. */
1557
1558 /* Likewise. */
1559
1560 \f
1561 /* File names in DBX format. */
1562
1563 /* Likewise. */
1564
1565 \f
1566 /* Macros for SDB and Dwarf Output. */
1567
1568 /* Define this macro if GCC should produce dwarf version 2 format debugging
1569 output in response to the `-g' option. */
1570
1571 #define DWARF2_DEBUGGING_INFO 1
1572
1573 #define DWARF2_ASM_LINE_DEBUG_INFO (TARGET_DWARF2_ASM)
1574
1575 /* Use tags for debug info labels, so that they don't break instruction
1576 bundles. This also avoids getting spurious DV warnings from the
1577 assembler. This is similar to (*targetm.asm_out.internal_label), except that we
1578 add brackets around the label. */
1579
1580 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
1581 fprintf (FILE, TARGET_GNU_AS ? "[.%s%d:]\n" : ".%s%d:\n", PREFIX, NUM)
1582
1583 /* Use section-relative relocations for debugging offsets. Unlike other
1584 targets that fake this by putting the section VMA at 0, IA-64 has
1585 proper relocations for them. */
1586 #define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL, SECTION) \
1587 do { \
1588 fputs (integer_asm_op (SIZE, FALSE), FILE); \
1589 fputs ("@secrel(", FILE); \
1590 assemble_name (FILE, LABEL); \
1591 fputc (')', FILE); \
1592 } while (0)
1593
1594 /* Emit a PC-relative relocation. */
1595 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL) \
1596 do { \
1597 fputs (integer_asm_op (SIZE, FALSE), FILE); \
1598 fputs ("@pcrel(", FILE); \
1599 assemble_name (FILE, LABEL); \
1600 fputc (')', FILE); \
1601 } while (0)
1602 \f
1603 /* Register Renaming Parameters. */
1604
1605 /* A C expression that is nonzero if hard register number REGNO2 can be
1606 considered for use as a rename register for REGNO1 */
1607
1608 #define HARD_REGNO_RENAME_OK(REGNO1,REGNO2) \
1609 ia64_hard_regno_rename_ok((REGNO1), (REGNO2))
1610
1611 \f
1612 /* Miscellaneous Parameters. */
1613
1614 /* Flag to mark data that is in the small address area (addressable
1615 via "addl", that is, within a 2MByte offset of 0. */
1616 #define SYMBOL_FLAG_SMALL_ADDR (SYMBOL_FLAG_MACH_DEP << 0)
1617 #define SYMBOL_REF_SMALL_ADDR_P(X) \
1618 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_SMALL_ADDR) != 0)
1619
1620 /* An alias for a machine mode name. This is the machine mode that elements of
1621 a jump-table should have. */
1622
1623 #define CASE_VECTOR_MODE ptr_mode
1624
1625 /* Define as C expression which evaluates to nonzero if the tablejump
1626 instruction expects the table to contain offsets from the address of the
1627 table. */
1628
1629 #define CASE_VECTOR_PC_RELATIVE 1
1630
1631 /* Define this macro if operations between registers with integral mode smaller
1632 than a word are always performed on the entire register. */
1633
1634 #define WORD_REGISTER_OPERATIONS
1635
1636 /* Define this macro to be a C expression indicating when insns that read
1637 memory in MODE, an integral mode narrower than a word, set the bits outside
1638 of MODE to be either the sign-extension or the zero-extension of the data
1639 read. */
1640
1641 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
1642
1643 /* The maximum number of bytes that a single instruction can move quickly from
1644 memory to memory. */
1645 #define MOVE_MAX 8
1646
1647 /* A C expression which is nonzero if on this machine it is safe to "convert"
1648 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
1649 than INPREC) by merely operating on it as if it had only OUTPREC bits. */
1650
1651 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1652
1653 /* A C expression describing the value returned by a comparison operator with
1654 an integral mode and stored by a store-flag instruction (`sCOND') when the
1655 condition is true. */
1656
1657 /* ??? Investigate using STORE_FLAG_VALUE of -1 instead of 1. */
1658
1659 /* An alias for the machine mode for pointers. */
1660
1661 /* ??? This would change if we had ILP32 support. */
1662
1663 #define Pmode DImode
1664
1665 /* An alias for the machine mode used for memory references to functions being
1666 called, in `call' RTL expressions. */
1667
1668 #define FUNCTION_MODE Pmode
1669
1670 /* A C expression for the maximum number of instructions to execute via
1671 conditional execution instructions instead of a branch. A value of
1672 BRANCH_COST+1 is the default if the machine does not use
1673 cc0, and 1 if it does use cc0. */
1674 /* ??? Investigate. */
1675 #define MAX_CONDITIONAL_EXECUTE 12
1676
1677 extern int ia64_final_schedule;
1678
1679 #define TARGET_UNWIND_TABLES_DEFAULT true
1680
1681 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 15 : INVALID_REGNUM)
1682
1683 /* This function contains machine specific function data. */
1684 struct GTY(()) machine_function
1685 {
1686 /* The new stack pointer when unwinding from EH. */
1687 rtx ia64_eh_epilogue_sp;
1688
1689 /* The new bsp value when unwinding from EH. */
1690 rtx ia64_eh_epilogue_bsp;
1691
1692 /* The GP value save register. */
1693 rtx ia64_gp_save;
1694
1695 /* The number of varargs registers to save. */
1696 int n_varargs;
1697
1698 /* The number of the next unwind state to copy. */
1699 int state_num;
1700 };
1701
1702 #define DONT_USE_BUILTIN_SETJMP
1703
1704 /* Output any profiling code before the prologue. */
1705
1706 #undef PROFILE_BEFORE_PROLOGUE
1707 #define PROFILE_BEFORE_PROLOGUE 1
1708
1709 /* Initialize library function table. */
1710 #undef TARGET_INIT_LIBFUNCS
1711 #define TARGET_INIT_LIBFUNCS ia64_init_libfuncs
1712 \f
1713
1714 /* Switch on code for querying unit reservations. */
1715 #define CPU_UNITS_QUERY 1
1716
1717 /* End of ia64.h */
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