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1.1 root 1: /* Definitions of target machine for GNU compiler.
2: Motorola m88100 in an 88open OCS/BCS environment.
3: Copyright (C) 1988, 1989, 1990, 1991 Free Software Foundation, Inc.
4: Contributed by Michael Tiemann ([email protected])
5: Enhanced by Michael Meissner ([email protected])
6: Currently supported by Tom Wood ([email protected])
7:
8: This file is part of GNU CC.
9:
10: GNU CC is free software; you can redistribute it and/or modify
11: it under the terms of the GNU General Public License as published by
12: the Free Software Foundation; either version 2, or (at your option)
13: any later version.
14:
15: GNU CC is distributed in the hope that it will be useful,
16: but WITHOUT ANY WARRANTY; without even the implied warranty of
17: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: GNU General Public License for more details.
19:
20: You should have received a copy of the GNU General Public License
21: along with GNU CC; see the file COPYING. If not, write to
22: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23:
24: /* The m88100 port of GNU CC adheres to the various standards from 88open.
25: These documents are available by writing:
26:
27: 88open Consortium Ltd.
28: 100 Homeland Court, Suite 800
29: San Jose, CA 95112
30: (408) 436-6600
31:
32: In brief, the current standards are:
33:
34: Binary Compatibility Standard, Release 1.1A, May 1991
35: This provides for portability of application-level software at the
36: executable level for AT&T System V Release 3.2.
37:
38: Object Compatibility Standard, Release 1.1A, May 1991
39: This provides for portability of application-level software at the
40: object file and library level for C, Fortran, and Cobol, and again,
41: largely for SVR3.
42:
43: Under development are standards for AT&T System V Release 4, based on the
44: [generic] System V Application Binary Interface from AT&T. These include:
45:
46: System V Application Binary Interface, Motorola 88000 Processor Supplement
47: Another document from AT&T for SVR4 specific to the m88100.
48: Available from Prentice Hall.
49:
50: System V Application Binary Interface, Motorola 88000 Processor Supplement,
51: Release 1.1, Draft H, May 6, 1991
52: A proposed update to the AT&T document from 88open.
53:
54: System V ABI Implementation Guide for the M88000 Processor,
55: Release 1.0, January 1991
56: A companion ABI document from 88open. */
57:
58: /* Other m88k*.h files include this one and override certain items.
59: At present, these are m88kv3.h, m88kv4.h, m88kdgux.h, and m88kluna.h.
60: Additionally, m88kv4.h and m88kdgux.h include svr4.h first. All other
61: m88k targets except m88kluna.h are based on svr3.h. */
62:
63: /* Choose SVR3 as the default. */
64: #if !defined(DBX_DEBUGGING_INFO) && !defined(DWARF_DEBUGGING_INFO)
65: #include "svr3.h"
66: #endif
67:
68: /* External types used. */
69:
70: /* What instructions are needed to manufacture an integer constant. */
71: enum m88k_instruction {
72: m88k_zero,
73: m88k_or,
74: m88k_subu,
75: m88k_or_lo16,
76: m88k_or_lo8,
77: m88k_set,
78: m88k_oru_hi16,
79: m88k_oru_or
80: };
81:
82: /* External variables/functions defined in m88k.c. */
83:
84: extern char *m88k_pound_sign;
85: extern char *m88k_short_data;
86:
87: extern int m88k_gp_threshold;
88: extern int m88k_prologue_done;
89: extern int m88k_function_number;
90: extern int m88k_fp_offset;
91: extern int m88k_stack_size;
92: extern int m88k_case_index;
93:
94: extern struct rtx_def *m88k_compare_reg;
95: extern struct rtx_def *m88k_compare_op0;
96: extern struct rtx_def *m88k_compare_op1;
97:
1.1.1.2 root 98: extern enum attr_cpu m88k_cpu;
99:
1.1 root 100: extern int null_epilogue ();
101: extern int integer_ok_for_set ();
102: extern int m88k_debugger_offset ();
103: extern void m88k_handle_pragma_token ();
104:
105: extern void emit_bcnd ();
106: extern void expand_block_move ();
107: extern void m88k_layout_frame ();
108: extern void m88k_output_prologue ();
109: extern void m88k_output_epilogue ();
110: extern void output_function_profiler ();
111: extern void output_function_block_profiler ();
112: extern void output_block_profiler ();
113: extern void output_file_start ();
114: extern void output_ascii ();
115: extern void output_label ();
116: extern void print_operand ();
117: extern void print_operand_address ();
118:
119: extern char *output_load_const_int ();
120: extern char *output_load_const_float ();
121: extern char *output_load_const_double ();
122: extern char *output_load_const_dimode ();
123: extern char *output_and ();
124: extern char *output_ior ();
125: extern char *output_xor ();
126: extern char *output_call ();
127:
128: extern struct rtx_def *emit_test ();
129: extern struct rtx_def *legitimize_address ();
130: extern struct rtx_def *legitimize_operand ();
131: extern struct rtx_def *m88k_function_arg ();
132: extern struct rtx_def *m88k_builtin_saveregs ();
133:
134: extern enum m88k_instruction classify_integer ();
135:
136: /* external variables defined elsewhere in the compiler */
137:
138: extern int target_flags; /* -m compiler switches */
139: extern int frame_pointer_needed; /* current function has a FP */
140: extern int current_function_pretend_args_size; /* args size without ... */
141: extern int flag_delayed_branch; /* -fdelayed-branch */
142: extern int flag_pic; /* -fpic */
143: extern char * reg_names[];
144:
145: /* Specify the default monitors. The meaning of these values can
146: be obtained by doing "grep MONITOR_GCC *m88k*". Generally, the
147: values downward from 0x8000 are tests that will soon go away.
148: values upward from 0x1 are generally useful tests that will remain. */
149:
150: #ifndef MONITOR_GCC
151: #define MONITOR_GCC 0
152: #endif
153:
154: /*** Controlling the Compilation Driver, `gcc' ***/
155:
156: /* Some machines may desire to change what optimizations are performed for
157: various optimization levels. This macro, if defined, is executed once
158: just after the optimization level is determined and before the remainder
159: of the command options have been parsed. Values set in this macro are
160: used as the default values for the other command line options.
161:
162: LEVEL is the optimization level specified; 2 if -O2 is specified,
163: 1 if -O is specified, and 0 if neither is specified. */
164:
165: /* This macro used to store 0 in flag_signed_bitfields.
166: Not only is that misuse of this macro; the whole idea is wrong.
167:
168: The GNU C dialect makes bitfields signed by default,
169: regardless of machine type. Making any machine inconsistent in this
170: regard is bad for portability.
171:
172: I chose to make bitfields signed by default because this is consistent
173: with the way ordinary variables are handled: `int' equals `signed int'.
174: If there is a good reason to prefer making bitfields unsigned by default,
175: it cannot have anything to do with the choice of machine.
176: If the reason is good enough, we should change the convention for all machines.
177:
178: -- rms, 20 July 1991. */
179:
180: #define OPTIMIZATION_OPTIONS(LEVEL) \
181: do { \
182: if (LEVEL) \
183: { \
184: flag_omit_frame_pointer = 1; \
185: } \
186: } while (0)
187:
188: /* LIB_SPEC, LINK_SPEC, and STARTFILE_SPEC defined in svr3.h.
189: ASM_SPEC, ASM_FINAL_SPEC, LIB_SPEC, LINK_SPEC, and STARTFILE_SPEC redefined
190: in svr4.h.
191: CPP_SPEC, ASM_SPEC, ASM_FINAL_SPEC, LIB_SPEC, LINK_SPEC, and
192: STARTFILE_SPEC redefined in m88kdgux.h. */
193:
194: /*** Run-time Target Specification ***/
195:
196: /* Names to predefine in the preprocessor for this target machine.
197: Redefined in m88kv3.h, m88kv4.h, m88kdgux.h, and m88kluna.h. */
198: #define CPP_PREDEFINES "-Dm88000 -Dm88k -Dunix -D__CLASSIFY_TYPE__=2"
199:
200: #define TARGET_VERSION fprintf (stderr, " (%s%s)", \
201: VERSION_INFO1, VERSION_INFO2)
202:
203: /* Print subsidiary information on the compiler version in use.
204: Redefined in m88kv4.h, and m88kluna.h. */
205: #define VERSION_INFO1 "88open OCS/BCS, "
1.1.1.3 ! root 206: #define VERSION_INFO2 "29 May 1992"
1.1 root 207: #define VERSION_STRING version_string
1.1.1.3 ! root 208: #define TM_SCCS_ID "@(#)m88k.h 2.1.11.11 29 May 1992 13:20:31"
1.1 root 209:
210: /* Run-time compilation parameters selecting different hardware subsets. */
211:
212: /* Macro to define tables used to set the flags.
213: This is a list in braces of pairs in braces,
214: each pair being { "NAME", VALUE }
215: where VALUE is the bits to set or minus the bits to clear.
216: An empty string NAME is used to identify the default VALUE. */
217:
218: #define MASK_88100 0x00000001 /* Target m88100 */
219: #define MASK_88110 0x00000002 /* Target m88110 */
220: #define MASK_OCS_DEBUG_INFO 0x00000004 /* Emit .tdesc info */
221: #define MASK_OCS_FRAME_POSITION 0x00000008 /* Debug frame = CFA, not r30 */
222: #define MASK_SVR4 0x00000010 /* Target is AT&T System V.4 */
223: #define MASK_VERSION_0300 0x00000020 /* Use version 03.00 syntax */
224: #define MASK_NO_UNDERSCORES 0x00000040 /* Don't emit a leading `_' */
225: #define MASK_BIG_PIC 0x00000080 /* PIC with large got-rel's -fPIC */
226: #define MASK_TRAP_LARGE_SHIFT 0x00000100 /* Trap if shift not <= 31 */
227: #define MASK_HANDLE_LARGE_SHIFT 0x00000200 /* Handle shift count >= 32 */
228: #define MASK_CHECK_ZERO_DIV 0x00000400 /* Check for int div. by 0 */
229: #define MASK_USE_DIV 0x00000800 /* No signed div. checks */
230: #define MASK_IDENTIFY_REVISION 0x00001000 /* Emit ident, with GCC rev */
231: #define MASK_WARN_PASS_STRUCT 0x00002000 /* Warn about passed structs */
232: #define MASK_OPTIMIZE_ARG_AREA 0x00004000 /* Save stack space */
233:
234: #define MASK_88000 (MASK_88100 | MASK_88110)
235: #define MASK_EITHER_LARGE_SHIFT (MASK_TRAP_LARGE_SHIFT | \
236: MASK_HANDLE_LARGE_SHIFT)
237:
238: #define TARGET_88100 ((target_flags & MASK_88000) == MASK_88100)
239: #define TARGET_88110 ((target_flags & MASK_88000) == MASK_88110)
240: #define TARGET_88000 ((target_flags & MASK_88000) == MASK_88000)
241:
242: #define TARGET_OCS_DEBUG_INFO (target_flags & MASK_OCS_DEBUG_INFO)
243: #define TARGET_OCS_FRAME_POSITION (target_flags & MASK_OCS_FRAME_POSITION)
244: #define TARGET_SVR4 (target_flags & MASK_SVR4)
245: #define TARGET_VERSION_0300 (target_flags & MASK_VERSION_0300)
246: #define TARGET_NO_UNDERSCORES (target_flags & MASK_NO_UNDERSCORES)
247: #define TARGET_BIG_PIC (target_flags & MASK_BIG_PIC)
248: #define TARGET_TRAP_LARGE_SHIFT (target_flags & MASK_TRAP_LARGE_SHIFT)
249: #define TARGET_HANDLE_LARGE_SHIFT (target_flags & MASK_HANDLE_LARGE_SHIFT)
250: #define TARGET_CHECK_ZERO_DIV (target_flags & MASK_CHECK_ZERO_DIV)
251: #define TARGET_USE_DIV (target_flags & MASK_USE_DIV)
252: #define TARGET_IDENTIFY_REVISION (target_flags & MASK_IDENTIFY_REVISION)
253: #define TARGET_WARN_PASS_STRUCT (target_flags & MASK_WARN_PASS_STRUCT)
254: #define TARGET_OPTIMIZE_ARG_AREA (target_flags & MASK_OPTIMIZE_ARG_AREA)
255:
256: #define TARGET_EITHER_LARGE_SHIFT (target_flags & MASK_EITHER_LARGE_SHIFT)
257:
258: /* Redefined in m88kv3.h,m88kv4.h, and m88kdgux.h. */
259: #define TARGET_DEFAULT (MASK_CHECK_ZERO_DIV)
260: #define CPU_DEFAULT MASK_88100
261:
262: #define TARGET_SWITCHES \
263: { \
264: { "88110", MASK_88110 }, \
265: { "88100", MASK_88100 }, \
266: { "88000", MASK_88000 }, \
267: { "ocs-debug-info", MASK_OCS_DEBUG_INFO }, \
268: { "no-ocs-debug-info", -MASK_OCS_DEBUG_INFO }, \
269: { "ocs-frame-position", MASK_OCS_FRAME_POSITION }, \
270: { "no-ocs-frame-position", -MASK_OCS_FRAME_POSITION }, \
271: { "svr4", MASK_SVR4 }, \
272: { "svr3", -MASK_SVR4 }, \
273: { "version-03.00", MASK_VERSION_0300 }, \
274: { "no-underscores", MASK_NO_UNDERSCORES }, \
275: { "big-pic", MASK_BIG_PIC }, \
276: { "trap-large-shift", MASK_TRAP_LARGE_SHIFT }, \
277: { "handle-large-shift", MASK_HANDLE_LARGE_SHIFT }, \
278: { "check-zero-division", MASK_CHECK_ZERO_DIV }, \
279: { "no-check-zero-division", -MASK_CHECK_ZERO_DIV }, \
280: { "use-div-instruction", MASK_USE_DIV }, \
281: { "identify-revision", MASK_IDENTIFY_REVISION }, \
282: { "warn-passed-structs", MASK_WARN_PASS_STRUCT }, \
283: { "optimize-arg-area", MASK_OPTIMIZE_ARG_AREA }, \
284: { "no-optimize-arg-area", -MASK_OPTIMIZE_ARG_AREA }, \
285: SUBTARGET_SWITCHES \
286: /* Default switches */ \
287: { "", TARGET_DEFAULT }, \
288: }
289:
290: /* Redefined in m88kdgux.h. */
291: #define SUBTARGET_SWITCHES
292:
293: /* Macro to define table for command options with values. */
294:
295: #define TARGET_OPTIONS { { "short-data-", &m88k_short_data } }
296:
297: /* Do any checking or such that is needed after processing the -m switches. */
298:
299: #define OVERRIDE_OPTIONS \
300: do { \
301: register int i; \
302: \
303: if ((target_flags & MASK_88000) == 0) \
304: target_flags |= CPU_DEFAULT; \
305: \
1.1.1.2 root 306: m88k_cpu = (TARGET_88000 ? CPU_M88000 \
307: : (TARGET_88100 ? CPU_M88100 : CPU_M88110)); \
308: \
1.1 root 309: if (TARGET_BIG_PIC) \
310: flag_pic = 2; \
311: \
312: if ((target_flags & MASK_EITHER_LARGE_SHIFT) == MASK_EITHER_LARGE_SHIFT) \
313: error ("-mtrap-large-shift and -mhandle-large-shift are incompatible");\
314: \
315: if (VERSION_0300_SYNTAX) \
316: { \
317: for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \
318: reg_names[i]--; \
319: m88k_pound_sign = "#"; \
320: } \
321: \
322: if (m88k_short_data) \
323: { \
324: char *p = m88k_short_data; \
325: while (*p) \
326: if (*p >= '0' && *p <= '9') \
327: p++; \
328: else \
329: { \
330: error ("Invalid option `-mshort-data-%s'", m88k_short_data); \
331: break; \
332: } \
333: m88k_gp_threshold = atoi (m88k_short_data); \
334: if (flag_pic) \
335: error ("-mshort-data-%s and PIC are incompatible", m88k_short_data); \
336: } \
337: } while (0)
338:
339: /*** Storage Layout ***/
340:
341: /* Sizes in bits of the various types. */
342: #define CHAR_TYPE_SIZE 8
343: #define SHORT_TYPE_SIZE 16
344: #define INT_TYPE_SIZE 32
345: #define LONG_TYPE_SIZE 32
346: #define LONG_LONG_TYPE_SIZE 64
347: #define FLOAT_TYPE_SIZE 32
348: #define DOUBLE_TYPE_SIZE 64
349: #define LONG_DOUBLE_TYPE_SIZE 64
350:
351: /* Define this if most significant bit is lowest numbered
352: in instructions that operate on numbered bit-fields.
353: Somewhat arbitrary. It matches the bit field patterns. */
354: #define BITS_BIG_ENDIAN 1
355:
356: /* Define this if most significant byte of a word is the lowest numbered.
357: That is true on the m88000. */
358: #define BYTES_BIG_ENDIAN 1
359:
360: /* Define this if most significant word of a multiword number is the lowest
361: numbered.
362: For the m88000 we can decide arbitrarily since there are no machine
363: instructions for them. */
364: #define WORDS_BIG_ENDIAN 1
365:
1.1.1.2 root 366: /* Number of bits in an addressable storage unit */
1.1 root 367: #define BITS_PER_UNIT 8
368:
369: /* Width in bits of a "word", which is the contents of a machine register.
370: Note that this is not necessarily the width of data type `int';
371: if using 16-bit ints on a 68000, this would still be 32.
372: But on a machine with 16-bit registers, this would be 16. */
373: #define BITS_PER_WORD 32
374:
375: /* Width of a word, in units (bytes). */
376: #define UNITS_PER_WORD 4
377:
378: /* Width in bits of a pointer.
379: See also the macro `Pmode' defined below. */
380: #define POINTER_SIZE 32
381:
382: /* Allocation boundary (in *bits*) for storing arguments in argument list. */
383: #define PARM_BOUNDARY 32
384:
385: /* Largest alignment for stack parameters (if greater than PARM_BOUNDARY). */
386: #define MAX_PARM_BOUNDARY 64
387:
388: /* Boundary (in *bits*) on which stack pointer should be aligned. */
389: #define STACK_BOUNDARY 128
390:
391: /* Allocation boundary (in *bits*) for the code of a function.
392: Pack code tightly when compiling crtstuff.c. */
393: #define FUNCTION_BOUNDARY (flag_inhibit_size_directive ? 32 : 128)
394:
395: /* No data type wants to be aligned rounder than this. */
396: #define BIGGEST_ALIGNMENT 64
397:
398: /* Make strings word-aligned so strcpy from constants will be faster. */
399: #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
400: (TREE_CODE (EXP) == STRING_CST \
401: && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
402:
403: /* Make arrays of chars word-aligned for the same reasons. */
404: #define DATA_ALIGNMENT(TYPE, ALIGN) \
405: (TREE_CODE (TYPE) == ARRAY_TYPE \
406: && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
407: && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
408:
409: /* Alignment of field after `int : 0' in a structure.
410: Ignored with PCC_BITFIELD_TYPE_MATTERS. */
411: /* #define EMPTY_FIELD_BOUNDARY 8 */
412:
413: /* Every structure's size must be a multiple of this. */
414: #define STRUCTURE_SIZE_BOUNDARY 8
415:
1.1.1.2 root 416: /* Set this nonzero if move instructions will actually fail to work
1.1 root 417: when given unaligned data. */
1.1.1.2 root 418: #define STRICT_ALIGNMENT 1
1.1 root 419:
420: /* A bitfield declared as `int' forces `int' alignment for the struct. */
421: #define PCC_BITFIELD_TYPE_MATTERS 1
422:
423: /* Maximum size (in bits) to use for the largest integral type that
424: replaces a BLKmode type. */
425: /* #define MAX_FIXED_MODE_SIZE 0 */
426:
1.1.1.3 ! root 427: /* Check a `double' value for validity for a particular machine mode.
! 428: This is defined to avoid crashes outputting certain constants.
! 429: Since we output the number in hex, the assembler won't choke on it. */
! 430: /* #define CHECK_FLOAT_VALUE(MODE,VALUE) */
1.1 root 431:
432: /* A code distinguishing the floating point format of the target machine. */
433: /* #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT */
434:
435: /*** Register Usage ***/
436:
437: /* Number of actual hardware registers.
438: The hardware registers are assigned numbers for the compiler
439: from 0 to just below FIRST_PSEUDO_REGISTER.
440: All registers that the compiler knows about must be given numbers,
441: even those that are not normally considered general registers.
442:
1.1.1.3 ! root 443: The m88100 has a General Register File (GRF) of 32 32-bit registers.
! 444: The m88110 adds an Extended Register File (XRF) of 32 80-bit registers. */
! 445: #define FIRST_PSEUDO_REGISTER 64
! 446: #define FIRST_EXTENDED_REGISTER 32
! 447:
! 448: /* General notes on extended registers, their use and misuse.
! 449:
! 450: Possible good uses:
! 451:
! 452: spill area instead of memory.
! 453: -waste if only used once
! 454:
! 455: floating point caluclations
! 456: -probably a waste unless we have run out of general purpose registers
! 457:
! 458: freeing up general purpose registers
! 459: -e.g. may be able to have more loop invariants if floating
! 460: point is moved into extended registers.
! 461:
! 462:
! 463: I've noticed wasteful moves into and out of extended registers; e.g. a load
! 464: into x21, then inside a loop a move into r24, then r24 used as input to
! 465: an fadd. Why not just load into r24 to begin with? Maybe the new cse.c
! 466: will address this. This wastes a move, but the load,store and move could
! 467: have been saved had extended registers been used throughout.
! 468: E.g. in the code following code, if z and xz are placed in extended
! 469: registers, there is no need to save preserve registers.
! 470:
! 471: long c=1,d=1,e=1,f=1,g=1,h=1,i=1,j=1,k;
! 472:
! 473: double z=0,xz=4.5;
! 474:
! 475: foo(a,b)
! 476: long a,b;
! 477: {
! 478: while (a < b)
! 479: {
! 480: k = b + c + d + e + f + g + h + a + i + j++;
! 481: z += xz;
! 482: a++;
! 483: }
! 484: printf("k= %d; z=%f;\n", k, z);
! 485: }
! 486:
! 487: I've found that it is possible to change the constraints (putting * before
! 488: the 'r' constraints int the fadd.ddd instruction) and get the entire
! 489: addition and store to go into extended registers. However, this also
! 490: forces simple addition and return of floating point arguments to a
! 491: function into extended registers. Not the correct solution.
! 492:
! 493: Found the following note in local-alloc.c which may explain why I can't
! 494: get both registers to be in extended registers since two are allocated in
! 495: local-alloc and one in global-alloc. Doesn't explain (I don't believe)
! 496: why an extended register is used instead of just using the preserve
! 497: register.
! 498:
! 499: from local-alloc.c:
! 500: We have provision to exempt registers, even when they are contained
! 501: within the block, that can be tied to others that are not contained in it.
! 502: This is so that global_alloc could process them both and tie them then.
! 503: But this is currently disabled since tying in global_alloc is not
! 504: yet implemented.
! 505:
! 506: The explaination of why the preserved register is not used is as follows,
! 507: I believe. The registers are being allocated in order. Tieing is not
! 508: done so efficiently, so when it comes time to do the first allocation,
! 509: there are no registers left to use without spilling except extended
! 510: registers. Then when the next pseudo register needs a hard reg, there
! 511: are still no registers to be had for free, but this one must be a GRF
! 512: reg instead of an extended reg, so a preserve register is spilled. Thus
! 513: the move from extended to GRF is necessitated. I do not believe this can
! 514: be 'fixed' through the config/*m88k* files.
! 515:
! 516: gcc seems to sometimes make worse use of register allocation -- not counting
! 517: moves -- whenever extended registers are present. For example in the
! 518: whetstone, the simple for loop (slightly modified)
! 519: for(i = 1; i <= n1; i++)
! 520: {
! 521: x1 = (x1 + x2 + x3 - x4) * t;
! 522: x2 = (x1 + x2 - x3 + x4) * t;
! 523: x3 = (x1 - x2 + x3 + x4) * t;
! 524: x4 = (x1 + x2 + x3 + x4) * t;
! 525: }
! 526: in general loads the high bits of the addresses of x2-x4 and i into registers
! 527: outside the loop. Whenever extended registers are used, it loads all of
! 528: these inside the loop. My conjecture is that since the 88110 has so many
! 529: registers, and gcc makes no distinction at this point -- just that they are
! 530: not fixed, that in loop.c it believes it can expect a number of registers
! 531: to be available. Then it allocates 'too many' in local-alloc which causes
! 532: problems later. 'Too many' are allocated because a large portion of the
! 533: registers are extended registers and cannot be used for certain purposes
! 534: ( e.g. hold the address of a variable). When this loop is compiled on its
! 535: own, the problem does not occur. I don't know the solution yet, though it
! 536: is probably in the base sources. Possibly a different way to calculate
! 537: "threshold". */
! 538:
! 539: /* 1 for registers that have pervasive standard uses and are not available
! 540: for the register allocator. Registers r14-r25 and x22-x29 are expected
! 541: to be preserved across function calls.
1.1 root 542:
1.1.1.3 ! root 543: On the 88000, the standard uses of the General Register File (GRF) are:
1.1 root 544: Reg 0 = Pseudo argument pointer (hardware fixed to 0).
545: Reg 1 = Subroutine return pointer (hardware).
546: Reg 2-9 = Parameter registers (OCS).
547: Reg 10 = OCS reserved temporary.
548: Reg 11 = Static link if needed [OCS reserved temporary].
549: Reg 12 = Address of structure return (OCS).
550: Reg 13 = OCS reserved temporary.
551: Reg 14-25 = Preserved register set.
552: Reg 26-29 = Reserved by OCS and ABI.
553: Reg 30 = Frame pointer (Common use).
1.1.1.3 ! root 554: Reg 31 = Stack pointer.
! 555:
! 556: The following follows the current 88open UCS specification for the
! 557: Extended Register File (XRF):
! 558: Reg 32 = x0 Always equal to zero
! 559: Reg 33-53 = x1-x21 Tempory registers (Caller Save)
! 560: Reg 54-61 = x22-x29 Preserver registers (Callee Save)
! 561: Reg 62-63 = x30-x31 Reserved for future ABI use.
! 562:
! 563: Note: The current 88110 extended register mapping is subject to change.
! 564: The bias towards caller-save registers is based on the
! 565: presumption that memory traffic can potentially be reduced by
! 566: allowing the "caller" to save only that part of the register
! 567: which is actually being used. (i.e. don't do a st.x if a st.d
! 568: is sufficient). Also, in scientific code (a.k.a. Fortran), the
! 569: large number of variables defined in common blocks may require
! 570: that almost all registers be saved across calls anyway. */
1.1 root 571:
572: #define FIXED_REGISTERS \
1.1.1.3 ! root 573: {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
! 574: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
! 575: 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
! 576: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1}
1.1 root 577:
578: /* 1 for registers not available across function calls.
579: These must include the FIXED_REGISTERS and also any
580: registers that can be used without being saved.
581: The latter must include the registers where values are returned
582: and the register where structure-value addresses are passed.
583: Aside from that, you can include as many other registers as you like. */
584:
585: #define CALL_USED_REGISTERS \
586: {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
1.1.1.3 ! root 587: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
! 588: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
! 589: 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1}
1.1 root 590:
591: /* Macro to conditionally modify fixed_regs/call_used_regs. */
592: #define CONDITIONAL_REGISTER_USAGE \
593: { \
1.1.1.3 ! root 594: if (! TARGET_88110) \
! 595: { \
! 596: register int i; \
! 597: for (i = FIRST_EXTENDED_REGISTER; i < FIRST_PSEUDO_REGISTER; i++) \
! 598: { \
! 599: fixed_regs[i] = 1; \
! 600: call_used_regs[i] = 1; \
! 601: } \
! 602: } \
1.1 root 603: if (flag_pic) \
1.1.1.3 ! root 604: { \
! 605: /* Current hack to deal with -fpic -O2 problems. */ \
! 606: fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
! 607: call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
! 608: global_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
! 609: } \
1.1 root 610: }
611:
612: /* These interfaces that don't apply to the m88000. */
613: /* OVERLAPPING_REGNO_P(REGNO) 0 */
614: /* INSN_CLOBBERS_REGNO_P(INSN, REGNO) 0 */
615: /* PRESERVE_DEATH_INFO_REGNO_P(REGNO) 0 */
616:
617: /* Return number of consecutive hard regs needed starting at reg REGNO
618: to hold something of mode MODE.
619: This is ordinarily the length in words of a value of mode MODE
620: but can be less for certain modes in special long registers.
621:
1.1.1.3 ! root 622: On the m88000, GRF registers hold 32-bits and XRF registers hold 80-bits.
! 623: An XRF register can hold any mode, but two GRF registers are required
! 624: for larger modes. */
! 625: #define HARD_REGNO_NREGS(REGNO, MODE) \
! 626: ((REGNO < FIRST_PSEUDO_REGISTER && REGNO >= FIRST_EXTENDED_REGISTER) \
! 627: ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
1.1 root 628:
629: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
630:
631: For double integers, we never put the value into an odd register so that
632: the operators don't run into the situation where the high part of one of
1.1.1.3 ! root 633: the inputs is the low part of the result register. (It's ok if the output
! 634: registers are the same as the input registers.) The XRF registers can
! 635: hold all modes, but only DF and SF modes can be manipulated in these
! 636: registers. The compiler should be allowed to use these as a fast spill
! 637: area. */
! 638: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
! 639: ((REGNO < FIRST_PSEUDO_REGISTER && REGNO >= FIRST_EXTENDED_REGISTER) \
! 640: ? TARGET_88110 \
! 641: : (((MODE) != DImode && (MODE) != DFmode && (MODE) != DCmode) \
! 642: || ((REGNO) & 1) == 0))
1.1 root 643:
644: /* Value is 1 if it is a good idea to tie two pseudo registers
645: when one has mode MODE1 and one has mode MODE2.
646: If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
647: for any hard reg, then this must be 0 for correct output. */
648: #define MODES_TIEABLE_P(MODE1, MODE2) \
649: (((MODE1) == DFmode || (MODE1) == DCmode || (MODE1) == DImode) \
650: == ((MODE2) == DFmode || (MODE2) == DCmode || (MODE2) == DImode))
651:
652: /* Specify the registers used for certain standard purposes.
653: The values of these macros are register numbers. */
654:
655: /* the m88000 pc isn't overloaded on a register that the compiler knows about. */
656: /* #define PC_REGNUM */
657:
658: /* Register to use for pushing function arguments. */
659: #define STACK_POINTER_REGNUM 31
660:
661: /* Base register for access to local variables of the function. */
662: #define FRAME_POINTER_REGNUM 30
663:
664: /* Base register for access to arguments of the function. */
665: #define ARG_POINTER_REGNUM 0
666:
667: /* Register used in cases where a temporary is known to be safe to use. */
668: #define TEMP_REGNUM 10
669:
670: /* Register in which static-chain is passed to a function. */
671: #define STATIC_CHAIN_REGNUM 11
672:
673: /* Register in which address to store a structure value
674: is passed to a function. */
675: #define STRUCT_VALUE_REGNUM 12
676:
677: /* Register to hold the addressing base for position independent
678: code access to data items. */
679: #define PIC_OFFSET_TABLE_REGNUM 25
680:
681: /* Order in which registers are preferred (most to least). Use temp
682: registers, then param registers top down. Preserve registers are
683: top down to maximize use of double memory ops for register save.
1.1.1.3 ! root 684: The 88open reserved registers (r26-r29 and x30-x31) may commonly be used
! 685: in most environments with the -fcall-used- or -fcall-saved- options. */
! 686: #define REG_ALLOC_ORDER \
! 687: { \
! 688: 13, 12, 11, 10, 29, 28, 27, 26, \
! 689: 62, 63, 9, 8, 7, 6, 5, 4, \
! 690: 3, 2, 1, 53, 52, 51, 50, 49, \
! 691: 48, 47, 46, 45, 44, 43, 42, 41, \
! 692: 40, 39, 38, 37, 36, 35, 34, 33, \
! 693: 25, 24, 23, 22, 21, 20, 19, 18, \
! 694: 17, 16, 15, 14, 61, 60, 59, 58, \
! 695: 57, 56, 55, 54, 30, 31, 0, 32}
! 696:
! 697: /* Order for leaf functions. */
! 698: #define REG_LEAF_ALLOC_ORDER \
! 699: { \
! 700: 9, 8, 7, 6, 13, 12, 11, 10, \
! 701: 29, 28, 27, 26, 62, 63, 5, 4, \
! 702: 3, 2, 0, 53, 52, 51, 50, 49, \
! 703: 48, 47, 46, 45, 44, 43, 42, 41, \
! 704: 40, 39, 38, 37, 36, 35, 34, 33, \
! 705: 25, 24, 23, 22, 21, 20, 19, 18, \
! 706: 17, 16, 15, 14, 61, 60, 59, 58, \
! 707: 57, 56, 55, 54, 30, 31, 1, 32}
! 708:
! 709: /* Switch between the leaf and non-leaf orderings. The purpose is to avoid
! 710: write-over scoreboard delays between caller and callee. */
! 711: #define ORDER_REGS_FOR_LOCAL_ALLOC \
! 712: { \
! 713: static int leaf[] = REG_LEAF_ALLOC_ORDER; \
! 714: static int nonleaf[] = REG_ALLOC_ORDER; \
! 715: \
! 716: bcopy (regs_ever_live[1] ? nonleaf : leaf, reg_alloc_order, \
! 717: FIRST_PSEUDO_REGISTER * sizeof (int)); \
! 718: }
1.1 root 719:
720: /*** Register Classes ***/
721:
722: /* Define the classes of registers for register constraints in the
723: machine description. Also define ranges of constants.
724:
725: One of the classes must always be named ALL_REGS and include all hard regs.
726: If there is more than one class, another class must be named NO_REGS
727: and contain no registers.
728:
729: The name GENERAL_REGS must be the name of a class (or an alias for
730: another name such as ALL_REGS). This is the class of registers
731: that is allowed by "g" or "r" in a register constraint.
732: Also, registers outside this class are allocated only when
733: instructions express preferences for them.
734:
735: The classes must be numbered in nondecreasing order; that is,
736: a larger-numbered class must never be contained completely
737: in a smaller-numbered class.
738:
739: For any two classes, it is very desirable that there be another
740: class that represents their union. */
741:
1.1.1.3 ! root 742: /* The m88000 hardware has two kinds of registers. In addition, we denote
1.1 root 743: the arg pointer as a separate class. */
744:
1.1.1.3 ! root 745: enum reg_class { NO_REGS, AP_REG, XRF_REGS, GENERAL_REGS, AGRF_REGS,
! 746: XGRF_REGS, ALL_REGS, LIM_REG_CLASSES };
1.1 root 747:
748: #define N_REG_CLASSES (int) LIM_REG_CLASSES
749:
750: /* Give names of register classes as strings for dump file. */
1.1.1.3 ! root 751: #define REG_CLASS_NAMES {"NO_REGS", "AP_REG", "XRF_REGS", "GENERAL_REGS", \
! 752: "AGRF_REGS", "XGRF_REGS", "ALL_REGS" }
1.1 root 753:
754: /* Define which registers fit in which classes.
755: This is an initializer for a vector of HARD_REG_SET
756: of length N_REG_CLASSES. */
1.1.1.3 ! root 757: #define REG_CLASS_CONTENTS {{0x00000000, 0x00000000}, \
! 758: {0x00000001, 0x00000000}, \
! 759: {0x00000000, 0xffffffff}, \
! 760: {0xfffffffe, 0x00000000}, \
! 761: {0xffffffff, 0x00000000}, \
! 762: {0xfffffffe, 0xffffffff}, \
! 763: {0xffffffff, 0xffffffff}}
1.1 root 764:
765: /* The same information, inverted:
766: Return the class number of the smallest class containing
767: reg number REGNO. This could be a conditional expression
768: or could index an array. */
1.1.1.3 ! root 769: #define REGNO_REG_CLASS(REGNO) \
! 770: ((REGNO) ? ((REGNO < 32) ? GENERAL_REGS : XRF_REGS) : AP_REG)
1.1 root 771:
772: /* The class value for index registers, and the one for base regs. */
1.1.1.3 ! root 773: #define BASE_REG_CLASS AGRF_REGS
1.1 root 774: #define INDEX_REG_CLASS GENERAL_REGS
775:
1.1.1.3 ! root 776: /* Get reg_class from a letter such as appears in the machine description.
! 777: For the 88000, the following class/letter is defined for the XRF:
! 778: x - Extended register file */
! 779: #define REG_CLASS_FROM_LETTER(C) \
! 780: (((C) == 'x') ? XRF_REGS : NO_REGS)
1.1 root 781:
782: /* Macros to check register numbers against specific register classes.
783: These assume that REGNO is a hard or pseudo reg number.
784: They give nonzero only if REGNO is a hard reg of the suitable class
785: or a pseudo reg currently allocated to a suitable hard reg.
786: Since they use reg_renumber, they are safe only once reg_renumber
787: has been allocated, which happens in local-alloc.c. */
1.1.1.3 ! root 788: #define REGNO_OK_FOR_BASE_P(REGNO) \
! 789: ((REGNO) < FIRST_EXTENDED_REGISTER \
! 790: || (unsigned) reg_renumber[REGNO] < FIRST_EXTENDED_REGISTER)
! 791: #define REGNO_OK_FOR_INDEX_P(REGNO) \
! 792: (((REGNO) && (REGNO) < FIRST_EXTENDED_REGISTER) \
! 793: || (unsigned) reg_renumber[REGNO] < FIRST_EXTENDED_REGISTER)
1.1 root 794:
795: /* Given an rtx X being reloaded into a reg required to be
796: in class CLASS, return the class of reg to actually use.
797: In general this is just CLASS; but on some machines
798: in some cases it is preferable to use a more restrictive class.
799: Double constants should be in a register iff they can be made cheaply. */
1.1.1.3 ! root 800: #define PREFERRED_RELOAD_CLASS(X,CLASS) \
! 801: (CONSTANT_P(X) && (CLASS == XRF_REGS) ? NO_REGS : (CLASS))
1.1 root 802:
803: /* Return the maximum number of consecutive registers
804: needed to represent mode MODE in a register of class CLASS. */
1.1.1.3 ! root 805: #define CLASS_MAX_NREGS(CLASS, MODE) \
! 806: ((((CLASS) == XRF_REGS) ? 1 \
! 807: : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)))
1.1 root 808:
809: /* Letters in the range `I' through `P' in a register constraint string can
810: be used to stand for particular ranges of immediate operands. The C
811: expression is true iff C is a known letter and VALUE is appropriate for
812: that letter.
813:
1.1.1.2 root 814: For the m88000, the following constants are used:
1.1 root 815: `I' requires a non-negative 16-bit value.
816: `J' requires a non-positive 16-bit value.
817: `K' is unused.
818: `L' requires a constant with only the upper 16-bits set.
819: `M' requires constant values that can be formed with `set'.
820: `N' requires a negative value.
821: `O' requires zero.
822: `P' requires a non-negative value. */
823:
824: /* Quick tests for certain values. */
825: #define SMALL_INT(X) (SMALL_INTVAL (INTVAL (X)))
826: #define SMALL_INTVAL(I) ((unsigned) (I) < 0x10000)
827: #define ADD_INT(X) (ADD_INTVAL (INTVAL (X)))
828: #define ADD_INTVAL(I) ((unsigned) (I) + 0xffff < 0x1ffff)
829: #define POWER_OF_2(I) ((I) && POWER_OF_2_or_0(I))
830: #define POWER_OF_2_or_0(I) (((I) & ((unsigned)(I) - 1)) == 0)
831:
832: #define CONST_OK_FOR_LETTER_P(VALUE, C) \
833: ((C) == 'I' ? SMALL_INTVAL (VALUE) \
834: : (C) == 'J' ? SMALL_INTVAL (-(VALUE)) \
835: : (C) == 'L' ? ((VALUE) & 0xffff) == 0 \
836: : (C) == 'M' ? integer_ok_for_set (VALUE) \
837: : (C) == 'N' ? (VALUE) < 0 \
838: : (C) == 'O' ? (VALUE) == 0 \
839: : (C) == 'P' ? (VALUE) >= 0 \
840: : 0)
841:
842: /* Similar, but for floating constants, and defining letters G and H.
843: Here VALUE is the CONST_DOUBLE rtx itself. For the m88000, the
844: constraints are: `G' requires zero, and `H' requires one or two. */
845: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
846: ((C) == 'G' ? (CONST_DOUBLE_HIGH (VALUE) == 0 \
847: && CONST_DOUBLE_LOW (VALUE) == 0) \
848: : 0)
849:
850: /* Letters in the range `Q' through `U' in a register constraint string
851: may be defined in a machine-dependent fashion to stand for arbitrary
852: operand types.
853:
854: For the m88k, `Q' handles addresses in a call context. */
855:
856: #define EXTRA_CONSTRAINT(OP, C) \
857: ((C) == 'Q' ? symbolic_address_p (OP) : 0)
858:
859: /*** Describing Stack Layout ***/
860:
861: /* Define this if pushing a word on the stack moves the stack pointer
862: to a smaller address. */
863: #define STACK_GROWS_DOWNWARD
864:
865: /* Define this if the addresses of local variable slots are at negative
866: offsets from the frame pointer. */
867: /* #define FRAME_GROWS_DOWNWARD */
868:
869: /* Offset from the frame pointer to the first local variable slot to be
870: allocated. For the m88k, the debugger wants the return address (r1)
871: stored at location r30+4, and the previous frame pointer stored at
872: location r30. */
873: #define STARTING_FRAME_OFFSET 8
874:
875: /* If we generate an insn to push BYTES bytes, this says how many the
876: stack pointer really advances by. The m88k has no push instruction. */
877: /* #define PUSH_ROUNDING(BYTES) */
878:
879: /* If defined, the maximum amount of space required for outgoing arguments
880: will be computed and placed into the variable
881: `current_function_outgoing_args_size'. No space will be pushed
882: onto the stack for each call; instead, the function prologue should
883: increase the stack frame size by this amount. */
884: #define ACCUMULATE_OUTGOING_ARGS
885:
886: /* Offset from the stack pointer register to the first location at which
887: outgoing arguments are placed. Use the default value zero. */
888: /* #define STACK_POINTER_OFFSET 0 */
889:
890: /* Offset of first parameter from the argument pointer register value.
891: Using an argument pointer, this is 0 for the m88k. GCC knows
892: how to eliminate the argument pointer references if necessary. */
893: #define FIRST_PARM_OFFSET(FNDECL) 0
894:
895: /* Define this if functions should assume that stack space has been
896: allocated for arguments even when their values are passed in
897: registers.
898:
899: The value of this macro is the size, in bytes, of the area reserved for
900: arguments passed in registers.
901:
902: This space can either be allocated by the caller or be a part of the
903: machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE'
904: says which. */
905: #define REG_PARM_STACK_SPACE(FNDECL) 32
906:
907: /* Define this macro if REG_PARM_STACK_SPACE is defined but stack
908: parameters don't skip the area specified by REG_PARM_STACK_SPACE.
909: Normally, when a parameter is not passed in registers, it is placed on
910: the stack beyond the REG_PARM_STACK_SPACE area. Defining this macro
911: suppresses this behavior and causes the parameter to be passed on the
912: stack in its natural location. */
913: #define STACK_PARMS_IN_REG_PARM_AREA
914:
915: /* Define this if it is the responsibility of the caller to allocate the
916: area reserved for arguments passed in registers. If
917: `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect of this
918: macro is to determine whether the space is included in
919: `current_function_outgoing_args_size'. */
920: /* #define OUTGOING_REG_PARM_STACK_SPACE */
921:
922: /* Offset from the stack pointer register to an item dynamically allocated
923: on the stack, e.g., by `alloca'.
924:
925: The default value for this macro is `STACK_POINTER_OFFSET' plus the
926: length of the outgoing arguments. The default is correct for most
927: machines. See `function.c' for details. */
928: /* #define STACK_DYNAMIC_OFFSET(FUNDECL) ... */
929:
930: /* Value is the number of bytes of arguments automatically
931: popped when returning from a subroutine call.
932: FUNTYPE is the data type of the function (as a tree),
933: or for a library call it is an identifier node for the subroutine name.
934: SIZE is the number of bytes of arguments passed on the stack. */
935: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
936:
937: /* Define how to find the value returned by a function.
938: VALTYPE is the data type of the value (as a tree).
939: If the precise function being called is known, FUNC is its FUNCTION_DECL;
940: otherwise, FUNC is 0. */
941: #define FUNCTION_VALUE(VALTYPE, FUNC) \
942: gen_rtx (REG, \
943: TYPE_MODE (VALTYPE) == BLKmode ? SImode : TYPE_MODE (VALTYPE), \
944: 2)
945:
946: /* Define this if it differs from FUNCTION_VALUE. */
947: /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) ... */
948:
949: /* Disable the promotion of some structures and unions to registers. */
950: #define RETURN_IN_MEMORY(TYPE) \
951: ((TREE_CODE (TYPE) == RECORD_TYPE || TREE_CODE(TYPE) == UNION_TYPE) \
952: && !(TYPE_MODE (TYPE) == SImode \
953: || (TYPE_MODE (TYPE) == BLKmode \
954: && TYPE_ALIGN (TYPE) == BITS_PER_WORD \
955: && int_size_in_bytes (TYPE) == UNITS_PER_WORD)))
956:
957: /* Define how to find the value returned by a library function
958: assuming the value has mode MODE. */
959: #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, 2)
960:
961: /* True if N is a possible register number for a function value
962: as seen by the caller. */
963: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 2)
964:
965: /* Determine whether a function argument is passed in a register, and
966: which register. See m88k.c. */
967: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
968: m88k_function_arg (CUM, MODE, TYPE, NAMED)
969:
970: /* Define this if it differs from FUNCTION_ARG. */
971: /* #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) ... */
972:
973: /* A C expression for the number of words, at the beginning of an
974: argument, must be put in registers. The value must be zero for
975: arguments that are passed entirely in registers or that are entirely
976: pushed on the stack. */
977: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) (0)
978:
979: /* A C expression that indicates when an argument must be passed by
980: reference. If nonzero for an argument, a copy of that argument is
981: made in memory and a pointer to the argument is passed instead of the
982: argument itself. The pointer is passed in whatever way is appropriate
983: for passing a pointer to that type. */
984: #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) (0)
985:
986: /* A C type for declaring a variable that is used as the first argument
987: of `FUNCTION_ARG' and other related values. It suffices to count
988: the number of words of argument so far. */
989: #define CUMULATIVE_ARGS int
990:
991: /* Initialize a variable CUM of type CUMULATIVE_ARGS for a call to a
992: function whose data type is FNTYPE. For a library call, FNTYPE is 0. */
993: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) ((CUM) = 0)
994:
995: /* A C statement (sans semicolon) to update the summarizer variable
996: CUM to advance past an argument in the argument list. The values
997: MODE, TYPE and NAMED describe that argument. Once this is done,
998: the variable CUM is suitable for analyzing the *following* argument
999: with `FUNCTION_ARG', etc. (TYPE is null for libcalls where that
1000: information may not be available.) */
1001: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1002: do { \
1003: enum machine_mode __mode = (TYPE) ? TYPE_MODE (TYPE) : (MODE); \
1004: if ((CUM & 1) \
1005: && (__mode == DImode || __mode == DFmode \
1006: || ((TYPE) && TYPE_ALIGN (TYPE) > BITS_PER_WORD))) \
1007: CUM++; \
1008: CUM += (((__mode != BLKmode) \
1009: ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE)) \
1010: + 3) / 4; \
1011: } while (0)
1012:
1013: /* True if N is a possible register number for function argument passing.
1014: On the m88000, these are registers 2 through 9. */
1015: #define FUNCTION_ARG_REGNO_P(N) ((N) <= 9 && (N) >= 2)
1016:
1017: /* A C expression which determines whether, and in which direction,
1018: to pad out an argument with extra space. The value should be of
1019: type `enum direction': either `upward' to pad above the argument,
1020: `downward' to pad below, or `none' to inhibit padding.
1021:
1022: This macro does not control the *amount* of padding; that is always
1023: just enough to reach the next multiple of `FUNCTION_ARG_BOUNDARY'. */
1024: #define FUNCTION_ARG_PADDING(MODE, TYPE) \
1025: ((MODE) == BLKmode \
1026: || ((TYPE) && (TREE_CODE (TYPE) == RECORD_TYPE \
1027: || TREE_CODE (TYPE) == UNION_TYPE)) \
1028: ? upward : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY ? downward : none)
1029:
1030: /* If defined, a C expression that gives the alignment boundary, in bits,
1031: of an argument with the specified mode and type. If it is not defined,
1032: `PARM_BOUNDARY' is used for all arguments. */
1033: #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
1034: (((TYPE) ? TYPE_ALIGN (TYPE) : GET_MODE_SIZE (MODE)) <= PARM_BOUNDARY \
1035: ? PARM_BOUNDARY : 2 * PARM_BOUNDARY)
1036:
1037: /* Generate necessary RTL for __builtin_saveregs().
1038: ARGLIST is the argument list; see expr.c. */
1039: #define EXPAND_BUILTIN_SAVEREGS(ARGLIST) m88k_builtin_saveregs (ARGLIST)
1040:
1041: /* Generate the assembly code for function entry. */
1042: #define FUNCTION_PROLOGUE(FILE, SIZE) m88k_output_prologue(FILE, SIZE)
1043:
1044: /* Output assembler code to FILE to increment profiler label # LABELNO
1045: for profiling a function entry. Redefined in m88kv3.h, m88kv4.h and
1046: m88kdgux.h. */
1047: #define FUNCTION_PROFILER(FILE, LABELNO) \
1048: output_function_profiler (FILE, LABELNO, "mcount", 1)
1049:
1050: /* Output assembler code to FILE to initialize basic-block profiling for
1051: the current module. LABELNO is unique to each instance. */
1052: #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO) \
1053: output_function_block_profiler (FILE, LABELNO)
1054:
1055: /* Output assembler code to FILE to increment the count associated with
1056: the basic block number BLOCKNO. */
1057: #define BLOCK_PROFILER(FILE, BLOCKNO) output_block_profiler (FILE, BLOCKNO)
1058:
1059: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1060: the stack pointer does not matter. The value is tested only in
1061: functions that have frame pointers.
1062: No definition is equivalent to always zero. */
1063: #define EXIT_IGNORE_STACK (1)
1064:
1065: /* Generate the assembly code for function exit. */
1066: #define FUNCTION_EPILOGUE(FILE, SIZE) m88k_output_epilogue(FILE, SIZE)
1067:
1068: /* Define the number of delay slots needed for the function epilogue.
1069: These are used for scheduling the function epilogue and depend on
1070: what the epilogue looks like. */
1071: #define DELAY_SLOTS_FOR_EPILOGUE delay_slots_for_epilogue ()
1072:
1073: /* Define whether INSN can be placed in delay slot N for the epilogue. */
1074: #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN,N) \
1075: eligible_for_epilogue_delay (INSN)
1076:
1077: /* Value should be nonzero if functions must have frame pointers.
1078: Zero means the frame pointer need not be set up (and parms
1079: may be accessed via the stack pointer) in functions that seem suitable.
1080: This is computed in `reload', in reload1.c. */
1081: #define FRAME_POINTER_REQUIRED \
1082: (frame_pointer_needed \
1083: || (write_symbols != NO_DEBUG && !TARGET_OCS_FRAME_POSITION))
1084:
1085: /* Definitions for register eliminations.
1086:
1087: We have two registers that can be eliminated on the m88k. First, the
1088: frame pointer register can often be eliminated in favor of the stack
1089: pointer register. Secondly, the argument pointer register can always be
1090: eliminated; it is replaced with either the stack or frame pointer. */
1091:
1092: /* This is an array of structures. Each structure initializes one pair
1093: of eliminable registers. The "from" register number is given first,
1094: followed by "to". Eliminations of the same "from" register are listed
1095: in order of preference. */
1096: #define ELIMINABLE_REGS \
1097: {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1098: { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
1099: { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
1100:
1101: /* Given FROM and TO register numbers, say whether this elimination
1102: is allowed. */
1103: #define CAN_ELIMINATE(FROM, TO) \
1104: (!((FROM) == FRAME_POINTER_REGNUM && FRAME_POINTER_REQUIRED))
1105:
1106: /* Define the offset between two registers, one to be eliminated, and the other
1107: its replacement, at the start of a routine. */
1108: #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1109: { m88k_layout_frame (); \
1110: if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1111: (OFFSET) = m88k_fp_offset; \
1112: else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
1113: (OFFSET) = m88k_stack_size - m88k_fp_offset; \
1114: else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1115: (OFFSET) = m88k_stack_size; \
1116: else \
1117: abort (); \
1118: }
1119:
1120: /*** Trampolines for Nested Functions ***/
1121:
1122: /* Output assembler code for a block containing the constant parts
1123: of a trampoline, leaving space for the variable parts.
1124:
1125: This block is placed on the stack and filled in. It is aligned
1126: 0 mod 128 and those portions that are executed are constant.
1127: This should work for instruction caches that have cache lines up
1128: to the aligned amount (128 is arbitrary), provided no other code
1129: producer is attempting to play the same game. This of course is
1130: in violation of any number of 88open standards. */
1131:
1132: #define TRAMPOLINE_TEMPLATE(FILE) \
1133: { \
1134: /* Save the return address (r1) in the static chain reg (r11). */ \
1135: fprintf (FILE, "\tor\t %s,%s,0\n", reg_names[11], reg_names[1]); \
1136: /* Locate this block; transfer to the next instruction. */ \
1137: fprintf (FILE, "\tbsr\t 1\n"); \
1138: /* Save r10; use it as the relative pointer; restore r1. */ \
1139: fprintf (FILE, "\tst\t %s,%s,24\n", reg_names[10], reg_names[1]); \
1140: fprintf (FILE, "\tor\t %s,%s,0\n", reg_names[10], reg_names[1]); \
1141: fprintf (FILE, "\tor\t %s,%s,0\n", reg_names[1], reg_names[11]); \
1142: /* Load the function's address and go there. */ \
1143: fprintf (FILE, "\tld\t %s,%s,32\n", reg_names[11], reg_names[10]); \
1144: fprintf (FILE, "\tjmp.n\t %s\n", reg_names[11]); \
1145: /* Restore r10 and load the static chain register. */ \
1146: fprintf (FILE, "\tld.d\t %s,%s,24\n", reg_names[10], reg_names[10]); \
1147: /* Storage: r10 save area, static chain, function address. */ \
1148: ASM_OUTPUT_INT (FILE, const0_rtx); \
1149: ASM_OUTPUT_INT (FILE, const0_rtx); \
1150: ASM_OUTPUT_INT (FILE, const0_rtx); \
1151: }
1152:
1153: /* Length in units of the trampoline for entering a nested function.
1154: This is really two components. The first 32 bytes are fixed and
1155: must be copied; the last 12 bytes are just storage that's filled
1156: in later. So for allocation purposes, it's 32+12 bytes, but for
1.1.1.2 root 1157: initialization purposes, it's 32 bytes. */
1.1 root 1158:
1159: #define TRAMPOLINE_SIZE (32+12)
1160:
1161: /* Alignment required for a trampoline. 128 is used to find the
1162: beginning of a line in the instruction cache and to allow for
1163: instruction cache lines of up to 128 bytes. */
1164:
1165: #define TRAMPOLINE_ALIGNMENT 128
1166:
1167: /* Emit RTL insns to initialize the variable parts of a trampoline.
1168: FNADDR is an RTX for the address of the function's pure code.
1169: CXT is an RTX for the static chain value for the function. */
1170:
1171: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
1172: { \
1173: emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 40)), FNADDR); \
1174: emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 36)), CXT); \
1175: }
1176:
1177: /*** Library Subroutine Names ***/
1178:
1179: /* Define this macro if GNU CC should generate calls to the System V
1180: (and ANSI C) library functions `memcpy' and `memset' rather than
1181: the BSD functions `bcopy' and `bzero'. */
1182: #define TARGET_MEM_FUNCTIONS
1183:
1184: /*** Addressing Modes ***/
1185:
1186: /* #define HAVE_POST_INCREMENT */
1187: /* #define HAVE_POST_DECREMENT */
1188:
1189: /* #define HAVE_PRE_DECREMENT */
1190: /* #define HAVE_PRE_INCREMENT */
1191:
1192: /* Recognize any constant value that is a valid address. */
1193: #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X))
1194:
1195: /* Maximum number of registers that can appear in a valid memory address. */
1196: #define MAX_REGS_PER_ADDRESS 2
1197:
1198: /* The condition for memory shift insns. */
1199: #define SCALED_ADDRESS_P(ADDR) \
1200: (GET_CODE (ADDR) == PLUS \
1201: && (GET_CODE (XEXP (ADDR, 0)) == MULT \
1202: || GET_CODE (XEXP (ADDR, 1)) == MULT))
1203:
1204: /* Can the reference to X be made short? */
1205: #define SHORT_ADDRESS_P(X,TEMP) \
1206: ((TEMP) = (GET_CODE (X) == CONST ? get_related_value (X) : X), \
1207: ((TEMP) && GET_CODE (TEMP) == SYMBOL_REF && SYMBOL_REF_FLAG (TEMP)))
1208:
1209: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
1210: that is a valid memory address for an instruction.
1211: The MODE argument is the machine mode for the MEM expression
1212: that wants to use this address.
1213:
1214: On the m88000, a legitimate address has the form REG, REG+REG,
1215: REG+SMALLINT, REG+(REG*modesize) (REG[REG]), or SMALLINT.
1216:
1217: The register elimination process should deal with the argument
1218: pointer and frame pointer changing to REG+SMALLINT. */
1219:
1220: #define LEGITIMATE_INDEX_P(X, MODE) \
1221: ((GET_CODE (X) == CONST_INT \
1222: && SMALL_INT (X)) \
1223: || (REG_P (X) \
1224: && REG_OK_FOR_INDEX_P (X)) \
1225: || (GET_CODE (X) == MULT \
1226: && REG_P (XEXP (X, 0)) \
1227: && REG_OK_FOR_INDEX_P (XEXP (X, 0)) \
1228: && GET_CODE (XEXP (X, 1)) == CONST_INT \
1229: && INTVAL (XEXP (X, 1)) == GET_MODE_SIZE (MODE)))
1230:
1231: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1232: { \
1233: register rtx _x; \
1234: if (REG_P (X)) \
1235: { \
1236: if (REG_OK_FOR_BASE_P (X)) \
1237: goto ADDR; \
1238: } \
1239: else if (GET_CODE (X) == PLUS) \
1240: { \
1241: register rtx _x0 = XEXP (X, 0); \
1242: register rtx _x1 = XEXP (X, 1); \
1243: if ((flag_pic \
1244: && _x0 == pic_offset_table_rtx \
1245: && (flag_pic == 2 \
1246: ? REG_P (_x1) \
1247: : (GET_CODE (_x1) == SYMBOL_REF \
1248: || GET_CODE (_x1) == LABEL_REF))) \
1249: || (REG_P (_x0) \
1250: && (REG_OK_FOR_BASE_P (_x0) \
1251: && LEGITIMATE_INDEX_P (_x1, MODE))) \
1252: || (REG_P (_x1) \
1253: && (REG_OK_FOR_BASE_P (_x1) \
1254: && LEGITIMATE_INDEX_P (_x0, MODE)))) \
1255: goto ADDR; \
1256: } \
1257: else if (GET_CODE (X) == LO_SUM) \
1258: { \
1259: register rtx _x0 = XEXP (X, 0); \
1260: register rtx _x1 = XEXP (X, 1); \
1261: if (((REG_P (_x0) \
1262: && REG_OK_FOR_BASE_P (_x0)) \
1263: || (GET_CODE (_x0) == SUBREG \
1264: && REG_P (SUBREG_REG (_x0)) \
1265: && REG_OK_FOR_BASE_P (SUBREG_REG (_x0)))) \
1266: && CONSTANT_P (_x1)) \
1267: goto ADDR; \
1268: } \
1269: else if (GET_CODE (X) == CONST_INT \
1270: && SMALL_INT (X)) \
1271: goto ADDR; \
1272: else if (SHORT_ADDRESS_P (X, _x)) \
1273: goto ADDR; \
1274: }
1275:
1276: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
1277: and check its validity for a certain class.
1278: We have two alternate definitions for each of them.
1279: The usual definition accepts all pseudo regs; the other rejects
1280: them unless they have been allocated suitable hard regs.
1281: The symbol REG_OK_STRICT causes the latter definition to be used.
1282:
1283: Most source files want to accept pseudo regs in the hope that
1284: they will get allocated to the class that the insn wants them to be in.
1285: Source files for reload pass need to be strict.
1286: After reload, it makes no difference, since pseudo regs have
1287: been eliminated by then. */
1288:
1289: #ifndef REG_OK_STRICT
1290:
1291: /* Nonzero if X is a hard reg that can be used as an index
1292: or if it is a pseudo reg. Not the argument pointer. */
1293: #define REG_OK_FOR_INDEX_P(X) (X)
1294: /* Nonzero if X is a hard reg that can be used as a base reg
1295: or if it is a pseudo reg. */
1296: #define REG_OK_FOR_BASE_P(X) (1)
1297:
1298: #else
1299:
1300: /* Nonzero if X is a hard reg that can be used as an index. */
1301: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
1302: /* Nonzero if X is a hard reg that can be used as a base reg. */
1303: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1304:
1305: #endif
1306:
1307: /* Try machine-dependent ways of modifying an illegitimate address
1308: to be legitimate. If we find one, return the new, valid address.
1309: This macro is used in only one place: `memory_address' in explow.c.
1310:
1311: OLDX is the address as it was before break_out_memory_refs was called.
1312: In some cases it is useful to look at this to decide what needs to be done.
1313:
1314: MODE and WIN are passed so that this macro can use
1315: GO_IF_LEGITIMATE_ADDRESS.
1316:
1317: It is always safe for this macro to do nothing. It exists to recognize
1318: opportunities to optimize the output. */
1319:
1320: /* On the m88000, change REG+N into REG+REG, and REG+(X*Y) into REG+REG. */
1321:
1322: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
1323: { \
1324: if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 1))) \
1325: (X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
1326: copy_to_mode_reg (SImode, XEXP (X, 1))); \
1327: if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 0))) \
1328: (X) = gen_rtx (PLUS, SImode, XEXP (X, 1), \
1329: copy_to_mode_reg (SImode, XEXP (X, 0))); \
1330: if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == MULT) \
1331: (X) = gen_rtx (PLUS, SImode, XEXP (X, 1), \
1332: force_operand (XEXP (X, 0), 0)); \
1333: if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == MULT) \
1334: (X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
1335: force_operand (XEXP (X, 1), 0)); \
1336: if (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == CONST \
1337: || GET_CODE (X) == LABEL_REF) \
1338: (X) = legitimize_address (flag_pic, X, gen_reg_rtx (Pmode)); \
1339: if (memory_address_p (MODE, X)) \
1340: goto WIN; }
1341:
1342: /* Go to LABEL if ADDR (a legitimate address expression)
1343: has an effect that depends on the machine mode it is used for.
1344: On the the m88000 this is never true. */
1345:
1346: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
1347:
1348: /* Nonzero if the constant value X is a legitimate general operand.
1349: It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
1350: #define LEGITIMATE_CONSTANT_P(X) (1)
1351:
1352: /*** Condition Code Information ***/
1353:
1354: /* C code for a data type which is used for declaring the `mdep'
1355: component of `cc_status'. It defaults to `int'. */
1356: /* #define CC_STATUS_MDEP int */
1357:
1358: /* A C expression to initialize the `mdep' field to "empty". */
1359: /* #define CC_STATUS_MDEP_INIT (cc_status.mdep = 0) */
1360:
1361: /* Macro to zap the normal portions of CC_STATUS, but leave the
1362: machine dependent parts (ie, literal synthesis) alone. */
1363: /* #define CC_STATUS_INIT_NO_MDEP \
1364: (cc_status.flags = 0, cc_status.value1 = 0, cc_status.value2 = 0) */
1365:
1366: /* When using a register to hold the condition codes, the cc_status
1367: mechanism cannot be used. */
1368: #define NOTICE_UPDATE_CC(EXP, INSN) (0)
1369:
1370: /*** Miscellaneous Parameters ***/
1371:
1372: /* Define the codes that are matched by predicates in m88k.c. */
1373: #define PREDICATE_CODES \
1374: {"move_operand", {SUBREG, REG, CONST_INT, LO_SUM, MEM}}, \
1375: {"call_address_operand", {SUBREG, REG, SYMBOL_REF, LABEL_REF, CONST}}, \
1376: {"arith_operand", {SUBREG, REG, CONST_INT}}, \
1377: {"arith5_operand", {SUBREG, REG, CONST_INT}}, \
1378: {"arith32_operand", {SUBREG, REG, CONST_INT}}, \
1379: {"arith64_operand", {SUBREG, REG, CONST_INT}}, \
1380: {"int5_operand", {CONST_INT}}, \
1381: {"int32_operand", {CONST_INT}}, \
1382: {"add_operand", {SUBREG, REG, CONST_INT}}, \
1383: {"reg_or_bbx_mask_operand", {SUBREG, REG, CONST_INT}}, \
1384: {"real_or_0_operand", {SUBREG, REG, CONST_DOUBLE}}, \
1385: {"relop", {EQ, NE, LT, LE, GE, GT, LTU, LEU, GEU, GTU}}, \
1386: {"relop_no_unsigned", {EQ, NE, LT, LE, GE, GT}}, \
1387: {"equality_op", {EQ, NE}}, \
1388: {"pc_or_label_ref", {PC, LABEL_REF}},
1389:
1.1.1.3 ! root 1390: /* The case table contains either words or branch instructions. This says
! 1391: which. We always claim that the vector is PC-relative. It is position
! 1392: independent when -fpic is used. */
! 1393: #define CASE_VECTOR_INSNS (TARGET_88100 || flag_pic)
! 1394:
1.1 root 1395: /* An alias for a machine mode name. This is the machine mode that
1396: elements of a jump-table should have. */
1397: #define CASE_VECTOR_MODE SImode
1398:
1399: /* Define this macro if jump-tables should contain relative addresses. */
1400: #define CASE_VECTOR_PC_RELATIVE
1401:
1402: /* Define this if control falls through a `case' insn when the index
1403: value is out of range. This means the specified default-label is
1404: actually ignored by the `case' insn proper. */
1405: /* #define CASE_DROPS_THROUGH */
1406:
1407: /* Specify the tree operation to be used to convert reals to integers. */
1408: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1409:
1410: /* This is the kind of divide that is easiest to do in the general case. */
1411: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1412:
1413: /* Define this as 1 if `char' should by default be signed; else as 0. */
1414: #define DEFAULT_SIGNED_CHAR 1
1415:
1416: /* The 88open ABI says size_t is unsigned int. */
1417: #define SIZE_TYPE "unsigned int"
1418:
1419: /* Allow and ignore #sccs directives */
1420: #define SCCS_DIRECTIVE
1421:
1422: /* Code to handle #pragma directives. The interface is a bit messy,
1423: but there's no simpler way to do this while still using yylex. */
1424: #define HANDLE_PRAGMA(FILE) \
1425: do { \
1426: while (c == ' ' || c == '\t') \
1427: c = getc (FILE); \
1428: if (c == '\n' || c == EOF) \
1429: { \
1430: m88k_handle_pragma_token (0, 0); \
1431: return c; \
1432: } \
1433: ungetc (c, FILE); \
1434: switch (yylex ()) \
1435: { \
1436: case IDENTIFIER: \
1437: case TYPENAME: \
1438: case STRING: \
1439: case CONSTANT: \
1440: m88k_handle_pragma_token (token_buffer, yylval.ttype); \
1441: break; \
1442: default: \
1443: m88k_handle_pragma_token (token_buffer, 0); \
1444: } \
1445: if (nextchar >= 0) \
1446: c = nextchar, nextchar = -1; \
1447: else \
1448: c = getc (FILE); \
1449: } while (1)
1450:
1451: /* Tell when to handle #pragma weak. This is only done for V.4. */
1452: #define HANDLE_PRAGMA_WEAK TARGET_SVR4
1453:
1454: /* Max number of bytes we can move from memory to memory
1455: in one reasonably fast instruction. */
1456: #define MOVE_MAX 64
1457:
1458: /* Define if normal loads of shorter-than-word items from memory clears
1459: the rest of the bigs in the register. */
1460: #define BYTE_LOADS_ZERO_EXTEND
1461:
1462: /* Zero if access to memory by bytes is faster. */
1463: #define SLOW_BYTE_ACCESS 1
1464:
1465: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1466: is done just by pretending it is already truncated. */
1467: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1468:
1469: /* Define this if addresses of constant functions
1470: shouldn't be put through pseudo regs where they can be cse'd.
1471: Desirable on machines where ordinary constants are expensive
1472: but a CALL with constant address is cheap. */
1473: #define NO_FUNCTION_CSE
1474:
1475: /* Define this macro if an argument declared as `char' or
1476: `short' in a prototype should actually be passed as an
1477: `int'. In addition to avoiding errors in certain cases of
1478: mismatch, it also makes for better code on certain machines. */
1479: #define PROMOTE_PROTOTYPES
1480:
1481: /* Define this macro if a float function always returns float
1482: (even in traditional mode). Redefined in m88kluna.h. */
1483: #define TRADITIONAL_RETURN_FLOAT
1484:
1485: /* We assume that the store-condition-codes instructions store 0 for false
1486: and some other value for true. This is the value stored for true. */
1487: #define STORE_FLAG_VALUE -1
1488:
1489: /* Specify the machine mode that pointers have.
1490: After generation of rtl, the compiler makes no further distinction
1491: between pointers and any other objects of this machine mode. */
1492: #define Pmode SImode
1493:
1494: /* A function address in a call instruction
1495: is a word address (for indexing purposes)
1496: so give the MEM rtx word mode. */
1497: #define FUNCTION_MODE SImode
1498:
1.1.1.3 ! root 1499: /* A barrier will be aligned so account for the possible expansion. */
! 1500: #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
! 1501: if (GET_CODE (INSN) == BARRIER) \
! 1502: LENGTH += 1;
! 1503:
1.1 root 1504: /* Compute the cost of computing a constant rtl expression RTX
1505: whose rtx-code is CODE. The body of this macro is a portion
1506: of a switch statement. If the code is computed here,
1507: return it with a return statement. Otherwise, break from the switch.
1508:
1509: We assume that any 16 bit integer can easily be recreated, so we
1510: indicate 0 cost, in an attempt to get GCC not to optimize things
1511: like comparison against a constant.
1512:
1513: The cost of CONST_DOUBLE is zero (if it can be placed in an insn, it
1514: is as good as a register; since it can't be placed in any insn, it
1515: won't do anything in cse, but it will cause expand_binop to pass the
1516: constant to the define_expands). */
1.1.1.3 ! root 1517: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
1.1 root 1518: case CONST_INT: \
1519: if (SMALL_INT (RTX)) \
1520: return 0; \
1521: else if (SMALL_INTVAL (- INTVAL (RTX))) \
1522: return 2; \
1523: else if (classify_integer (SImode, INTVAL (RTX)) != m88k_oru_or) \
1524: return 4; \
1525: return 7; \
1526: case HIGH: \
1527: return 2; \
1528: case CONST: \
1529: case LABEL_REF: \
1530: case SYMBOL_REF: \
1531: if (flag_pic) \
1532: return (flag_pic == 2) ? 11 : 8; \
1533: return 5; \
1534: case CONST_DOUBLE: \
1535: return 0;
1536:
1537: /* Provide the costs of an addressing mode that contains ADDR.
1.1.1.2 root 1538: If ADDR is not a valid address, its cost is irrelevant.
1.1 root 1539: REG+REG is made slightly more expensive because it might keep
1540: a register live for longer than we might like. */
1541: #define ADDRESS_COST(ADDR) \
1542: (GET_CODE (ADDR) == REG ? 1 : \
1543: GET_CODE (ADDR) == LO_SUM ? 1 : \
1544: GET_CODE (ADDR) == HIGH ? 2 : \
1545: GET_CODE (ADDR) == MULT ? 1 : \
1546: GET_CODE (ADDR) != PLUS ? 4 : \
1547: (REG_P (XEXP (ADDR, 0)) && REG_P (XEXP (ADDR, 1))) ? 2 : 1)
1548:
1549: /* Provide the costs of a rtl expression. This is in the body of a
1550: switch on CODE. */
1.1.1.3 ! root 1551: #define RTX_COSTS(X,CODE,OUTER_CODE) \
1.1 root 1552: case MEM: \
1553: return COSTS_N_INSNS (2); \
1554: case MULT: \
1555: return COSTS_N_INSNS (3); \
1556: case DIV: \
1557: case UDIV: \
1558: case MOD: \
1559: case UMOD: \
1560: return COSTS_N_INSNS (38);
1561:
1562: /* A C expressions returning the cost of moving data of MODE from a register
1563: to or from memory. This is more costly than between registers. */
1564: #define MEMORY_MOVE_COST(MODE) 4
1565:
1566: /* Provide the cost of a branch. Exact meaning under development. */
1567: #define BRANCH_COST (TARGET_88100 ? 1 : 2)
1568:
1569: /* Define this to be nonzero if the character `$' should be allowed
1570: by default in identifier names. */
1571: #define DOLLARS_IN_IDENTIFIERS 1
1572:
1573: /* Do not break .stabs pseudos into continuations. */
1574: #define DBX_CONTIN_LENGTH 0
1575:
1576: /*** Output of Assembler Code ***/
1577:
1578: /* Control the assembler format that we output. */
1579:
1580: /* Which assembler syntax. Redefined in m88kdgux.h. */
1581: #define VERSION_0300_SYNTAX TARGET_SVR4
1582:
1583: /* Allow pseudo-ops to be overridden. Override these in svr[34].h. */
1584: #undef INT_ASM_OP
1585: #undef ASCII_DATA_ASM_OP
1586: #undef CONST_SECTION_ASM_OP
1587: #undef CTORS_SECTION_ASM_OP
1588: #undef DTORS_SECTION_ASM_OP
1589: #undef INIT_SECTION_ASM_OP
1590: #undef FINI_SECTION_ASM_OP
1591: #undef TYPE_ASM_OP
1592: #undef SIZE_ASM_OP
1.1.1.3 ! root 1593: #undef WEAK_ASM_OP
! 1594: #undef SET_ASM_OP
! 1595: #undef SKIP_ASM_OP
! 1596: #undef COMMON_ASM_OP
1.1 root 1597:
1598: /* These are used in varasm.c as well. */
1.1.1.2 root 1599: #define TEXT_SECTION_ASM_OP "text"
1600: #define DATA_SECTION_ASM_OP "data"
1.1 root 1601:
1602: /* Other sections. */
1603: #define CONST_SECTION_ASM_OP (VERSION_0300_SYNTAX \
1.1.1.2 root 1604: ? "section\t .rodata,\"a\"" \
1605: : "section\t .rodata,\"x\"")
1.1 root 1606: #define TDESC_SECTION_ASM_OP (VERSION_0300_SYNTAX \
1.1.1.2 root 1607: ? "section\t .tdesc,\"a\"" \
1608: : "section\t .tdesc,\"x\"")
1.1 root 1609:
1610: /* These must be constant strings for crtstuff.c. */
1.1.1.2 root 1611: #define CTORS_SECTION_ASM_OP "section\t .ctors,\"d\""
1612: #define DTORS_SECTION_ASM_OP "section\t .dtors,\"d\""
1613: #define INIT_SECTION_ASM_OP "section\t .init,\"x\""
1614: #define FINI_SECTION_ASM_OP "section\t .fini,\"x\""
1.1 root 1615:
1616: /* These are pretty much common to all assemblers. */
1.1.1.2 root 1617: #define IDENT_ASM_OP "ident"
1618: #define FILE_ASM_OP "file"
1619: #define SECTION_ASM_OP "section"
1.1.1.3 ! root 1620: #define SET_ASM_OP "def"
1.1.1.2 root 1621: #define GLOBAL_ASM_OP "global"
1622: #define ALIGN_ASM_OP "align"
1623: #define SKIP_ASM_OP "zero"
1624: #define COMMON_ASM_OP "comm"
1.1.1.3 ! root 1625: #define BSS_ASM_OP "bss"
1.1.1.2 root 1626: #define FLOAT_ASM_OP "float"
1627: #define DOUBLE_ASM_OP "double"
1628: #define INT_ASM_OP "word"
1.1 root 1629: #define ASM_LONG INT_ASM_OP
1.1.1.2 root 1630: #define SHORT_ASM_OP "half"
1631: #define CHAR_ASM_OP "byte"
1632: #define ASCII_DATA_ASM_OP "string"
1.1 root 1633:
1634: /* These are particular to the global pool optimization. */
1.1.1.2 root 1635: #define SBSS_ASM_OP "sbss"
1636: #define SCOMM_ASM_OP "scomm"
1637: #define SDATA_SECTION_ASM_OP "sdata"
1.1 root 1638:
1639: /* These are specific to PIC. */
1.1.1.2 root 1640: #define TYPE_ASM_OP "type"
1641: #define SIZE_ASM_OP "size"
1642: #define WEAK_ASM_OP "weak"
1.1 root 1643: #ifndef AS_BUG_POUND_TYPE /* Faulty assemblers require @ rather than #. */
1644: #undef TYPE_OPERAND_FMT
1645: #define TYPE_OPERAND_FMT "#%s"
1646: #endif
1647:
1648: /* These are specific to version 03.00 assembler syntax. */
1.1.1.2 root 1649: #define INTERNAL_ASM_OP "local"
1650: #define VERSION_ASM_OP "version"
1651: #define UNALIGNED_SHORT_ASM_OP "uahalf"
1652: #define UNALIGNED_INT_ASM_OP "uaword"
1.1.1.3 ! root 1653: #define PUSHSECTION_ASM_OP "section"
! 1654: #define POPSECTION_ASM_OP "previous"
1.1 root 1655:
1656: /* Output any initial stuff to the assembly file. Always put out
1657: a file directive, even if not debugging.
1658:
1659: Immediately after putting out the file, put out a "sem.<value>"
1660: declaration. This should be harmless on other systems, and
1.1.1.2 root 1661: is used in DG/UX by the debuggers to supplement COFF. The
1.1 root 1662: fields in the integer value are as follows:
1663:
1664: Bits Value Meaning
1665: ---- ----- -------
1666: 0-1 0 No information about stack locations
1667: 1 Auto/param locations are based on r30
1668: 2 Auto/param locations are based on CFA
1669:
1670: 3-2 0 No information on dimension order
1671: 1 Array dims in sym table matches source language
1672: 2 Array dims in sym table is in reverse order
1673:
1674: 5-4 0 No information about the case of global names
1675: 1 Global names appear in the symbol table as in the source
1676: 2 Global names have been converted to lower case
1677: 3 Global names have been converted to upper case. */
1678:
1679: #ifdef SDB_DEBUGGING_INFO
1680: #define ASM_COFFSEM(FILE) \
1681: if (write_symbols == SDB_DEBUG) \
1682: { \
1683: fprintf (FILE, "\nsem.%x:\t\t; %s\n", \
1684: (((TARGET_OCS_FRAME_POSITION) ? 2 : 1) << 0) + (1 << 2) + (1 << 4),\
1685: (TARGET_OCS_FRAME_POSITION) \
1686: ? "frame is CFA, normal array dims, case unchanged" \
1687: : "frame is r30, normal array dims, case unchanged"); \
1688: }
1689: #else
1690: #define ASM_COFFSEM(FILE)
1691: #endif
1692:
1693: /* Output the first line of the assembly file. Redefined in m88kdgux.h. */
1694:
1695: #define ASM_FIRST_LINE(FILE) \
1696: do { \
1697: if (VERSION_0300_SYNTAX) \
1.1.1.2 root 1698: fprintf (FILE, "\t%s\t \"03.00\"\n", VERSION_ASM_OP); \
1.1 root 1699: } while (0)
1700:
1701: /* Override svr[34].h. */
1702: #undef ASM_FILE_START
1703: #define ASM_FILE_START(FILE) \
1704: output_file_start (FILE, f_options, sizeof f_options / sizeof f_options[0], \
1705: W_options, sizeof W_options / sizeof W_options[0])
1706:
1707: #undef ASM_FILE_END
1708:
1709: #define ASM_OUTPUT_SOURCE_FILENAME(FILE, NAME) \
1.1.1.2 root 1710: fprintf (FILE, "\t%s\t \"%s\"\n", FILE_ASM_OP, NAME)
1.1 root 1711:
1712: #ifdef SDB_DEBUGGING_INFO
1713: #define ASM_OUTPUT_SOURCE_LINE(FILE, LINE) \
1714: if (m88k_prologue_done) \
1715: fprintf (FILE, "\n\tln\t %d\t\t\t\t; Real source line %d\n",\
1716: LINE - sdb_begin_function_line, LINE)
1717: #endif
1718:
1719: /* Code to handle #ident directives. Override svr[34].h definition. */
1720: #undef ASM_OUTPUT_IDENT
1721: #ifdef DBX_DEBUGGING_INFO
1722: #define ASM_OUTPUT_IDENT(FILE, NAME)
1723: #else
1724: #define ASM_OUTPUT_IDENT(FILE, NAME) \
1.1.1.3 ! root 1725: output_ascii (FILE, IDENT_ASM_OP, 4000, NAME, strlen (NAME));
1.1 root 1726: #endif
1727:
1728: /* Output to assembler file text saying following lines
1729: may contain character constants, extra white space, comments, etc. */
1730: #define ASM_APP_ON ""
1731:
1732: /* Output to assembler file text saying following lines
1733: no longer contain unusual constructs. */
1734: #define ASM_APP_OFF ""
1735:
1736: /* Format the assembly opcode so that the arguments are all aligned.
1737: The maximum instruction size is 8 characters (fxxx.xxx), so a tab and a
1738: space will do to align the output. Abandon the output if a `%' is
1739: encountered. */
1740: #define ASM_OUTPUT_OPCODE(STREAM, PTR) \
1741: { \
1742: int ch; \
1743: char *orig_ptr; \
1744: \
1745: for (orig_ptr = (PTR); \
1746: (ch = *(PTR)) && ch != ' ' && ch != '\t' && ch != '\n' && ch != '%'; \
1747: (PTR)++) \
1748: putc (ch, STREAM); \
1749: \
1750: if (ch == ' ' && orig_ptr != (PTR) && (PTR) - orig_ptr < 8) \
1751: putc ('\t', STREAM); \
1752: }
1753:
1754: /* How to refer to registers in assembler output.
1755: This sequence is indexed by compiler's hard-register-number.
1756: Updated by OVERRIDE_OPTIONS to include the # for version 03.00 syntax. */
1757:
1758: #define REGISTER_NAMES \
1759: {"#r0"+1, "#r1"+1, "#r2"+1, "#r3"+1, "#r4"+1, "#r5"+1, "#r6"+1, "#r7"+1, \
1760: "#r8"+1, "#r9"+1, "#r10"+1,"#r11"+1,"#r12"+1,"#r13"+1,"#r14"+1,"#r15"+1,\
1761: "#r16"+1,"#r17"+1,"#r18"+1,"#r19"+1,"#r20"+1,"#r21"+1,"#r22"+1,"#r23"+1,\
1.1.1.3 ! root 1762: "#r24"+1,"#r25"+1,"#r26"+1,"#r27"+1,"#r28"+1,"#r29"+1,"#r30"+1,"#r31"+1,\
! 1763: "#x0"+1, "#x1"+1, "#x2"+1, "#x3"+1, "#x4"+1, "#x5"+1, "#x6"+1, "#x7"+1, \
! 1764: "#x8"+1, "#x9"+1, "#x10"+1,"#x11"+1,"#x12"+1,"#x13"+1,"#x14"+1,"#x15"+1,\
! 1765: "#x16"+1,"#x17"+1,"#x18"+1,"#x19"+1,"#x20"+1,"#x21"+1,"#x22"+1,"#x23"+1,\
! 1766: "#x24"+1,"#x25"+1,"#x26"+1,"#x27"+1,"#x28"+1,"#x29"+1,"#x30"+1,"#x31"+1}
1.1 root 1767:
1768: /* How to renumber registers for dbx and gdb. */
1769: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
1770:
1771: /* Tell when to declare ASM names. Override svr4.h to provide this hook. */
1772: #undef DECLARE_ASM_NAME
1773: #define DECLARE_ASM_NAME TARGET_SVR4
1774:
1775: /* Write the extra assembler code needed to declare a function properly. */
1776: #undef ASM_DECLARE_FUNCTION_NAME
1777: #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
1778: do { \
1779: if (DECLARE_ASM_NAME) \
1780: { \
1.1.1.2 root 1781: fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
1.1 root 1782: assemble_name (FILE, NAME); \
1783: putc (',', FILE); \
1784: fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
1785: putc ('\n', FILE); \
1786: } \
1787: ASM_OUTPUT_LABEL(FILE, NAME); \
1788: } while (0)
1789:
1790: /* Write the extra assembler code needed to declare an object properly. */
1791: #undef ASM_DECLARE_OBJECT_NAME
1792: #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
1793: do { \
1794: if (DECLARE_ASM_NAME) \
1795: { \
1.1.1.2 root 1796: fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
1.1 root 1797: assemble_name (FILE, NAME); \
1798: putc (',', FILE); \
1799: fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
1800: putc ('\n', FILE); \
1801: if (!flag_inhibit_size_directive) \
1802: { \
1.1.1.2 root 1803: fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
1.1 root 1804: assemble_name (FILE, NAME); \
1805: fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (decl))); \
1806: } \
1807: } \
1808: ASM_OUTPUT_LABEL(FILE, NAME); \
1809: } while (0)
1810:
1811: /* This is how to declare the size of a function. */
1812: #undef ASM_DECLARE_FUNCTION_SIZE
1813: #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
1814: do { \
1815: if (DECLARE_ASM_NAME) \
1816: { \
1817: if (!flag_inhibit_size_directive) \
1818: { \
1819: char label[256]; \
1820: static int labelno; \
1821: labelno++; \
1822: ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
1823: ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
1.1.1.2 root 1824: fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
1.1 root 1825: assemble_name (FILE, (FNAME)); \
1826: fprintf (FILE, ",%s-", &label[1]); \
1827: assemble_name (FILE, (FNAME)); \
1828: putc ('\n', FILE); \
1829: } \
1830: } \
1831: } while (0)
1832:
1833: /* This is how to output the definition of a user-level label named NAME,
1834: such as the label on a static function or variable NAME. */
1835: #define ASM_OUTPUT_LABEL(FILE,NAME) \
1836: do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
1837:
1838: /* This is how to output a command to make the user-level label named NAME
1839: defined for reference from other files. */
1840: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
1841: do { \
1.1.1.2 root 1842: fprintf (FILE, "\t%s\t ", GLOBAL_ASM_OP); \
1.1 root 1843: assemble_name (FILE, NAME); \
1844: putc ('\n', FILE); \
1845: } while (0)
1846:
1847: /* This is how to output a reference to a user-level label named NAME.
1848: Override svr[34].h. */
1849: #undef ASM_OUTPUT_LABELREF
1850: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
1851: { \
1852: if (! TARGET_NO_UNDERSCORES && ! VERSION_0300_SYNTAX) \
1853: fputc ('_', FILE); \
1854: fputs (NAME, FILE); \
1855: }
1856:
1857: /* This is how to output an internal numbered label where
1858: PREFIX is the class of label and NUM is the number within the class.
1859: For V.4, labels use `.' rather than `@'. */
1860:
1.1.1.3 ! root 1861: #undef ASM_OUTPUT_INTERNAL_LABEL
1.1 root 1862: #ifdef AS_BUG_DOT_LABELS /* The assembler requires a declaration of local. */
1863: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
1.1.1.2 root 1864: fprintf (FILE, VERSION_0300_SYNTAX ? ".%s%d:\n\t%s\t .%s%d\n" : "@%s%d:\n", \
1.1 root 1865: PREFIX, NUM, INTERNAL_ASM_OP, PREFIX, NUM)
1866: #else
1867: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
1868: fprintf (FILE, VERSION_0300_SYNTAX ? ".%s%d:\n" : "@%s%d:\n", PREFIX, NUM)
1869: #endif /* AS_BUG_DOT_LABELS */
1870:
1871: /* This is how to store into the string LABEL
1872: the symbol_ref name of an internal numbered label where
1873: PREFIX is the class of label and NUM is the number within the class.
1874: This is suitable for output with `assemble_name'. This must agree
1875: with ASM_OUTPUT_INTERNAL_LABEL above, except for being prefixed
1876: with an `*'. */
1877:
1.1.1.3 ! root 1878: #undef ASM_GENERATE_INTERNAL_LABEL
1.1 root 1879: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
1880: sprintf (LABEL, VERSION_0300_SYNTAX ? "*.%s%d" : "*@%s%d", PREFIX, NUM)
1881:
1882: /* Internal macro to get a single precision floating point value into
1883: an int, so we can print it's value in hex. */
1884: #define FLOAT_TO_INT_INTERNAL( FVALUE, IVALUE ) \
1885: { union { \
1886: REAL_VALUE_TYPE d; \
1887: struct { \
1888: unsigned sign : 1; \
1889: unsigned exponent1 : 1; \
1890: unsigned exponent2 : 3; \
1891: unsigned exponent3 : 7; \
1892: unsigned mantissa1 : 20; \
1893: unsigned mantissa2 : 3; \
1894: unsigned mantissa3 : 29; \
1895: } s; \
1896: } _u; \
1897: \
1898: union { \
1899: int i; \
1900: struct { \
1901: unsigned sign : 1; \
1902: unsigned exponent1 : 1; \
1903: unsigned exponent3 : 7; \
1904: unsigned mantissa1 : 20; \
1905: unsigned mantissa2 : 3; \
1906: } s; \
1907: } _u2; \
1908: \
1909: _u.d = REAL_VALUE_TRUNCATE (SFmode, FVALUE); \
1910: _u2.s.sign = _u.s.sign; \
1911: _u2.s.exponent1 = _u.s.exponent1; \
1912: _u2.s.exponent3 = _u.s.exponent3; \
1913: _u2.s.mantissa1 = _u.s.mantissa1; \
1914: _u2.s.mantissa2 = _u.s.mantissa2; \
1915: IVALUE = _u2.i; \
1916: }
1917:
1918: /* This is how to output an assembler line defining a `double' constant.
1919: Use "word" pseudos to avoid printing NaNs, infinity, etc. */
1920: #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
1921: do { \
1922: union { REAL_VALUE_TYPE d; long l[2]; } x; \
1923: x.d = (VALUE); \
1.1.1.2 root 1924: fprintf (FILE, "\t%s\t 0x%.8x, 0x%.8x\n", INT_ASM_OP, \
1.1 root 1925: x.l[0], x.l[1]); \
1926: } while (0)
1927:
1928: /* This is how to output an assembler line defining a `float' constant. */
1929: #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
1930: do { \
1931: int i; \
1932: FLOAT_TO_INT_INTERNAL (VALUE, i); \
1.1.1.2 root 1933: fprintf (FILE, "\t%s\t 0x%.8x\n", INT_ASM_OP, i); \
1.1 root 1934: } while (0)
1935:
1936: /* Likewise for `int', `short', and `char' constants. */
1937: #define ASM_OUTPUT_INT(FILE,VALUE) \
1.1.1.2 root 1938: ( fprintf (FILE, "\t%s\t ", INT_ASM_OP), \
1.1 root 1939: output_addr_const (FILE, (VALUE)), \
1940: fprintf (FILE, "\n"))
1941:
1942: #define ASM_OUTPUT_SHORT(FILE,VALUE) \
1.1.1.2 root 1943: ( fprintf (FILE, "\t%s\t ", SHORT_ASM_OP), \
1.1 root 1944: output_addr_const (FILE, (VALUE)), \
1945: fprintf (FILE, "\n"))
1946:
1947: #define ASM_OUTPUT_CHAR(FILE,VALUE) \
1.1.1.2 root 1948: ( fprintf (FILE, "\t%s\t ", CHAR_ASM_OP), \
1.1 root 1949: output_addr_const (FILE, (VALUE)), \
1950: fprintf (FILE, "\n"))
1951:
1952: /* This is how to output an assembler line for a numeric constant byte. */
1953: #define ASM_OUTPUT_BYTE(FILE,VALUE) \
1.1.1.2 root 1954: fprintf (FILE, "\t%s\t 0x%x\n", CHAR_ASM_OP, (VALUE))
1.1 root 1955:
1.1.1.3 ! root 1956: /* The single-byte pseudo-op is the default. Override svr[34].h. */
1.1 root 1957: #undef ASM_BYTE_OP
1.1.1.3 ! root 1958: #define ASM_BYTE_OP "byte"
1.1 root 1959: #undef ASM_OUTPUT_ASCII
1960: #define ASM_OUTPUT_ASCII(FILE, P, SIZE) \
1.1.1.3 ! root 1961: output_ascii (FILE, ASCII_DATA_ASM_OP, 48, P, SIZE)
1.1 root 1962:
1963: /* Epilogue for case labels. This jump instruction is called by casesi
1964: to transfer to the appropriate branch instruction within the table.
1965: The label `@L<n>e' is coined to mark the end of the table. */
1966: #define ASM_OUTPUT_CASE_END(FILE, NUM, TABLE) \
1967: do { \
1.1.1.3 ! root 1968: if (CASE_VECTOR_INSNS) \
! 1969: { \
! 1970: char label[256]; \
! 1971: ASM_GENERATE_INTERNAL_LABEL (label, "L", NUM); \
! 1972: fprintf (FILE, "%se:\n", &label[1]); \
! 1973: if (! flag_delayed_branch) \
! 1974: fprintf (FILE, "\tlda\t %s,%s[%s]\n", reg_names[1], \
! 1975: reg_names[1], reg_names[m88k_case_index]); \
! 1976: fprintf (FILE, "\tjmp\t %s\n", reg_names[1]); \
! 1977: } \
1.1 root 1978: } while (0)
1979:
1980: /* This is how to output an element of a case-vector that is absolute. */
1981: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1982: do { \
1983: char buffer[256]; \
1984: ASM_GENERATE_INTERNAL_LABEL (buffer, "L", VALUE); \
1.1.1.3 ! root 1985: fprintf (FILE, CASE_VECTOR_INSNS ? "\tbr\t %s\n" : "\tword\t %s\n", \
! 1986: &buffer[1]); \
1.1 root 1987: } while (0)
1988:
1989: /* This is how to output an element of a case-vector that is relative. */
1990: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
1991: ASM_OUTPUT_ADDR_VEC_ELT (FILE, VALUE)
1992:
1993: /* This is how to output an assembler line
1994: that says to advance the location counter
1995: to a multiple of 2**LOG bytes. */
1996: #define ASM_OUTPUT_ALIGN(FILE,LOG) \
1997: if ((LOG) != 0) \
1.1.1.2 root 1998: fprintf (FILE, "\t%s\t %d\n", ALIGN_ASM_OP, 1<<(LOG))
1.1 root 1999:
2000: /* Align the text address to half a cache boundary when it can only be
2001: reached by jumping. Pack code tightly when compiling crtstuff.c. */
2002: #define ASM_OUTPUT_ALIGN_CODE(FILE) \
2003: ASM_OUTPUT_ALIGN (FILE, (flag_inhibit_size_directive ? 2 : 3))
2004:
2005: /* Override svr[34].h. */
2006: #undef ASM_OUTPUT_SKIP
2007: #define ASM_OUTPUT_SKIP(FILE,SIZE) \
1.1.1.2 root 2008: fprintf (FILE, "\t%s\t %u\n", SKIP_ASM_OP, (SIZE))
1.1 root 2009:
2010: /* Override svr4.h. */
2011: #undef ASM_OUTPUT_EXTERNAL_LIBCALL
2012:
2013: /* This says how to output an assembler line to define a global common
2014: symbol. Size can be zero for the unusual case of a `struct { int : 0; }'.
2015: Override svr[34].h. */
2016: #undef ASM_OUTPUT_COMMON
2017: #undef ASM_OUTPUT_ALIGNED_COMMON
2018: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
1.1.1.2 root 2019: ( fprintf ((FILE), "\t%s\t ", \
2020: ((SIZE) ? (SIZE) : 1) <= m88k_gp_threshold ? SCOMM_ASM_OP : COMMON_ASM_OP), \
1.1 root 2021: assemble_name ((FILE), (NAME)), \
2022: fprintf ((FILE), ",%u\n", (SIZE) ? (SIZE) : 1))
2023:
1.1.1.2 root 2024: /* This says how to output an assembler line to define a local common
1.1 root 2025: symbol. Override svr[34].h. */
2026: #undef ASM_OUTPUT_LOCAL
2027: #undef ASM_OUTPUT_ALIGNED_LOCAL
2028: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
1.1.1.2 root 2029: ( fprintf ((FILE), "\t%s\t ", \
1.1.1.3 ! root 2030: ((SIZE) ? (SIZE) : 1) <= m88k_gp_threshold ? SBSS_ASM_OP : BSS_ASM_OP), \
1.1 root 2031: assemble_name ((FILE), (NAME)), \
2032: fprintf ((FILE), ",%u,%d\n", (SIZE) ? (SIZE) : 1, (SIZE) <= 4 ? 4 : 8))
2033:
2034: /* Store in OUTPUT a string (made with alloca) containing
2035: an assembler-name for a local static variable named NAME.
2036: LABELNO is an integer which is different for each call. */
2037: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
2038: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
2039: sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
2040:
2041: /* This is how to output an insn to push a register on the stack.
2042: It need not be very fast code. */
2043: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
2044: fprintf (FILE, "\tsubu\t %s,%s,%d\n\tst\t %s,%s,0\n", \
2045: reg_names[STACK_POINTER_REGNUM], \
2046: reg_names[STACK_POINTER_REGNUM], \
2047: (STACK_BOUNDARY / BITS_PER_UNIT), \
2048: reg_names[REGNO], \
2049: reg_names[STACK_POINTER_REGNUM])
2050:
2051: /* This is how to output an insn to pop a register from the stack. */
2052: #define ASM_OUTPUT_REG_POP(FILE,REGNO) \
2053: fprintf (FILE, "\tld\t %s,%s,0\n\taddu\t %s,%s,%d\n", \
2054: reg_names[REGNO], \
2055: reg_names[STACK_POINTER_REGNUM], \
2056: reg_names[STACK_POINTER_REGNUM], \
2057: reg_names[STACK_POINTER_REGNUM], \
2058: (STACK_BOUNDARY / BITS_PER_UNIT))
2059:
2060: /* Define the parentheses used to group arithmetic operations
2061: in assembler code. */
2062: #define ASM_OPEN_PAREN "("
2063: #define ASM_CLOSE_PAREN ")"
2064:
2065: /* Define results of standard character escape sequences. */
2066: #define TARGET_BELL 007
2067: #define TARGET_BS 010
2068: #define TARGET_TAB 011
2069: #define TARGET_NEWLINE 012
2070: #define TARGET_VT 013
2071: #define TARGET_FF 014
2072: #define TARGET_CR 015
2073:
2074: /* Macros to deal with OCS debug information */
2075:
2076: #define OCS_START_PREFIX "Ltb"
2077: #define OCS_END_PREFIX "Lte"
2078:
2079: #define PUT_OCS_FUNCTION_START(FILE) \
2080: { ASM_OUTPUT_INTERNAL_LABEL (FILE, OCS_START_PREFIX, m88k_function_number); }
2081:
2082: #define PUT_OCS_FUNCTION_END(FILE) \
2083: { ASM_OUTPUT_INTERNAL_LABEL (FILE, OCS_END_PREFIX, m88k_function_number); }
2084:
2085: /* Macros for debug information */
2086: #define DEBUGGER_AUTO_OFFSET(X) \
2087: (m88k_debugger_offset (X, 0) \
2088: + (TARGET_OCS_FRAME_POSITION ? 0 : m88k_stack_size - m88k_fp_offset))
2089:
2090: #define DEBUGGER_ARG_OFFSET(OFFSET, X) \
2091: (m88k_debugger_offset (X, OFFSET) \
2092: + (TARGET_OCS_FRAME_POSITION ? 0 : m88k_stack_size - m88k_fp_offset))
2093:
2094: /* Macros to deal with SDB debug information */
2095: #ifdef SDB_DEBUGGING_INFO
2096:
2097: /* Output structure tag names even when it causes a forward reference. */
2098: #define SDB_ALLOW_FORWARD_REFERENCES
2099:
2100: /* Print out extra debug information in the assembler file */
2101: #define PUT_SDB_SCL(a) \
2102: do { \
2103: register int s = (a); \
2104: register char *scl; \
2105: switch (s) \
2106: { \
2107: case C_EFCN: scl = "end of function"; break; \
2108: case C_NULL: scl = "NULL storage class"; break; \
2109: case C_AUTO: scl = "automatic"; break; \
2110: case C_EXT: scl = "external"; break; \
2111: case C_STAT: scl = "static"; break; \
2112: case C_REG: scl = "register"; break; \
2113: case C_EXTDEF: scl = "external definition"; break; \
2114: case C_LABEL: scl = "label"; break; \
2115: case C_ULABEL: scl = "undefined label"; break; \
2116: case C_MOS: scl = "structure member"; break; \
2117: case C_ARG: scl = "argument"; break; \
2118: case C_STRTAG: scl = "structure tag"; break; \
2119: case C_MOU: scl = "union member"; break; \
2120: case C_UNTAG: scl = "union tag"; break; \
2121: case C_TPDEF: scl = "typedef"; break; \
2122: case C_USTATIC: scl = "uninitialized static"; break; \
2123: case C_ENTAG: scl = "enumeration tag"; break; \
2124: case C_MOE: scl = "member of enumeration"; break; \
2125: case C_REGPARM: scl = "register parameter"; break; \
2126: case C_FIELD: scl = "bit field"; break; \
2127: case C_BLOCK: scl = "block start/end"; break; \
2128: case C_FCN: scl = "function start/end"; break; \
2129: case C_EOS: scl = "end of structure"; break; \
2130: case C_FILE: scl = "filename"; break; \
2131: case C_LINE: scl = "line"; break; \
2132: case C_ALIAS: scl = "duplicated tag"; break; \
2133: case C_HIDDEN: scl = "hidden"; break; \
2134: default: scl = "unknown"; break; \
2135: } \
2136: \
2137: fprintf(asm_out_file, "\tscl\t %d\t\t\t\t; %s\n", s, scl); \
2138: } while (0)
2139:
2140: #define PUT_SDB_TYPE(a) \
2141: do { \
2142: register int t = (a); \
2143: static char buffer[100]; \
2144: register char *p = buffer, *q; \
2145: register int typ = t; \
2146: register int i,d; \
2147: \
2148: for (i = 0; i <= 5; i++) \
2149: { \
2150: switch ((typ >> ((i*N_TSHIFT) + N_BTSHFT)) & 03) \
2151: { \
2152: case DT_PTR: \
2153: strcpy (p, "ptr to "); \
2154: p += sizeof("ptr to"); \
2155: break; \
2156: \
2157: case DT_ARY: \
2158: strcpy (p, "array of "); \
2159: p += sizeof("array of"); \
2160: break; \
2161: \
2162: case DT_FCN: \
2163: strcpy (p, "func ret "); \
2164: p += sizeof("func ret"); \
2165: break; \
2166: } \
2167: } \
2168: \
2169: switch (typ & N_BTMASK) \
2170: { \
2171: case T_NULL: q = "<no type>"; break; \
2172: case T_CHAR: q = "char"; break; \
2173: case T_SHORT: q = "short"; break; \
2174: case T_INT: q = "int"; break; \
2175: case T_LONG: q = "long"; break; \
2176: case T_FLOAT: q = "float"; break; \
2177: case T_DOUBLE: q = "double"; break; \
2178: case T_STRUCT: q = "struct"; break; \
2179: case T_UNION: q = "union"; break; \
2180: case T_ENUM: q = "enum"; break; \
2181: case T_MOE: q = "enum member"; break; \
2182: case T_UCHAR: q = "unsigned char"; break; \
2183: case T_USHORT: q = "unsigned short"; break; \
2184: case T_UINT: q = "unsigned int"; break; \
2185: case T_ULONG: q = "unsigned long"; break; \
2186: default: q = "void"; break; \
2187: } \
2188: \
2189: strcpy (p, q); \
2190: fprintf(asm_out_file, "\ttype\t %d\t\t\t\t; %s\n", \
2191: t, buffer); \
2192: } while (0)
2193:
2194: #define PUT_SDB_INT_VAL(a) \
2195: fprintf (asm_out_file, "\tval\t %d\n", (a))
2196:
2197: #define PUT_SDB_VAL(a) \
2198: ( fprintf (asm_out_file, "\tval\t "), \
2199: output_addr_const (asm_out_file, (a)), \
2200: fputc ('\n', asm_out_file))
2201:
2202: #define PUT_SDB_DEF(a) \
2203: do { fprintf (asm_out_file, "\tsdef\t "); \
2204: ASM_OUTPUT_LABELREF (asm_out_file, a); \
2205: fputc ('\n', asm_out_file); \
2206: } while (0)
2207:
2208: #define PUT_SDB_PLAIN_DEF(a) \
2209: fprintf(asm_out_file,"\tsdef\t .%s\n", a)
2210:
2211: /* Simply and endef now. */
2212: #define PUT_SDB_ENDEF \
2213: fputs("\tendef\n\n", asm_out_file)
2214:
2215: #define PUT_SDB_SIZE(a) \
2216: fprintf (asm_out_file, "\tsize\t %d\n", (a))
2217:
2218: /* Max dimensions to store for debug information (limited by COFF). */
2219: #define SDB_MAX_DIM 6
2220:
2221: /* New method for dim operations. */
2222: #define PUT_SDB_START_DIM \
2223: fputs("\tdim\t ", asm_out_file)
2224:
2225: /* How to end the DIM sequence. */
2226: #define PUT_SDB_LAST_DIM(a) \
2227: fprintf(asm_out_file, "%d\n", a)
2228:
2229: #define PUT_SDB_TAG(a) \
2230: do { \
2231: fprintf (asm_out_file, "\ttag\t "); \
2232: ASM_OUTPUT_LABELREF (asm_out_file, a); \
2233: fputc ('\n', asm_out_file); \
2234: } while( 0 )
2235:
2236: #define PUT_SDB_BLOCK_OR_FUNCTION(NAME, SCL, LINE) \
2237: do { \
2238: fprintf (asm_out_file, "\n\tsdef\t %s\n\tval\t .\n", \
2239: NAME); \
2240: PUT_SDB_SCL( SCL ); \
2241: fprintf (asm_out_file, "\tline\t %d\n\tendef\n\n", \
2242: (LINE)); \
2243: } while (0)
2244:
2245: #define PUT_SDB_BLOCK_START(LINE) \
2246: PUT_SDB_BLOCK_OR_FUNCTION (".bb", C_BLOCK, (LINE))
2247:
2248: #define PUT_SDB_BLOCK_END(LINE) \
2249: PUT_SDB_BLOCK_OR_FUNCTION (".eb", C_BLOCK, (LINE))
2250:
2251: #define PUT_SDB_FUNCTION_START(LINE) \
2252: do { \
2253: fprintf (asm_out_file, "\tln\t 1\n"); \
2254: PUT_SDB_BLOCK_OR_FUNCTION (".bf", C_FCN, (LINE)); \
2255: } while (0)
2256:
2257: #define PUT_SDB_FUNCTION_END(LINE) \
2258: do { \
2259: PUT_SDB_BLOCK_OR_FUNCTION (".ef", C_FCN, (LINE)); \
2260: } while (0)
2261:
2262: #define PUT_SDB_EPILOGUE_END(NAME) \
2263: do { \
2264: text_section (); \
2265: fprintf (asm_out_file, "\n\tsdef\t "); \
2266: ASM_OUTPUT_LABELREF(asm_out_file, (NAME)); \
2267: fputc('\n', asm_out_file); \
2268: PUT_SDB_SCL( C_EFCN ); \
2269: fprintf (asm_out_file, "\tendef\n\n"); \
2270: } while (0)
2271:
2272: #define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
2273: sprintf ((BUFFER), ".%dfake", (NUMBER));
2274:
2275: #endif /* SDB_DEBUGGING_INFO */
2276:
2277: /* Support const and tdesc sections. Generally, a const section will
2278: be distinct from the text section whenever we do V.4-like things
2279: and so follows DECLARE_ASM_NAME. Note that strings go in text
2280: rather than const. Override svr[34].h. */
2281:
2282: #undef USE_CONST_SECTION
2283: #undef EXTRA_SECTIONS
2284:
2285: #define USE_CONST_SECTION DECLARE_ASM_NAME
2286:
2287: #if defined(CTORS_SECTION_FUNCTION) /* SVR4 */
2288:
2289: #define EXTRA_SECTIONS in_const, in_tdesc, in_sdata, in_ctors, in_dtors
2290: #define INIT_SECTION_FUNCTION
2291: #define FINI_SECTION_FUNCTION
2292:
2293: #elif defined(FINI_SECTION_FUNCTION) /* SVR3 */
2294:
2295: #define EXTRA_SECTIONS in_const, in_tdesc, in_sdata, in_init, in_fini
2296: #define CTORS_SECTION_FUNCTION
2297: #define DTORS_SECTION_FUNCTION
2298:
2299: #else /* m88kluna or other not based on svr[34].h. */
2300:
1.1.1.3 ! root 2301: #undef INIT_SECTION_ASM_OP
1.1 root 2302: #define EXTRA_SECTIONS in_const, in_tdesc, in_sdata
2303: #define CONST_SECTION_FUNCTION \
2304: void \
2305: const_section () \
2306: { \
2307: text_section(); \
2308: }
2309: #define CTORS_SECTION_FUNCTION
2310: #define DTORS_SECTION_FUNCTION
2311: #define INIT_SECTION_FUNCTION
2312: #define FINI_SECTION_FUNCTION
2313:
2314: #endif /* CTORS_SECTION_FUNCTION */
2315:
2316: #undef EXTRA_SECTION_FUNCTIONS
2317: #define EXTRA_SECTION_FUNCTIONS \
2318: CONST_SECTION_FUNCTION \
2319: \
2320: void \
2321: tdesc_section () \
2322: { \
2323: if (in_section != in_tdesc) \
2324: { \
2325: fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \
2326: in_section = in_tdesc; \
2327: } \
2328: } \
2329: \
2330: void \
2331: sdata_section () \
2332: { \
2333: if (in_section != in_sdata) \
2334: { \
2335: fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
2336: in_section = in_sdata; \
2337: } \
2338: } \
2339: \
2340: CTORS_SECTION_FUNCTION \
2341: DTORS_SECTION_FUNCTION \
2342: INIT_SECTION_FUNCTION \
2343: FINI_SECTION_FUNCTION
2344:
2345: #undef READONLY_DATA_SECTION
2346:
2347: /* A C statement or statements to switch to the appropriate
2348: section for output of DECL. DECL is either a `VAR_DECL' node
2349: or a constant of some sort. RELOC indicates whether forming
2350: the initial value of DECL requires link-time relocations.
2351:
2352: For strings, the section is selected before the segment info is encoded. */
2353: #undef SELECT_SECTION
2354: #define SELECT_SECTION(DECL,RELOC) \
2355: { \
2356: if (TREE_CODE (DECL) == STRING_CST) \
2357: { \
2358: if (! flag_writable_strings) \
2359: const_section (); \
2360: else if (m88k_gp_threshold > 0 \
2361: && TREE_STRING_LENGTH (DECL) <= m88k_gp_threshold) \
2362: sdata_section (); \
2363: else \
2364: data_section (); \
2365: } \
2366: else if (TREE_CODE (DECL) == VAR_DECL) \
2367: { \
2368: if (SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0))) \
2369: sdata_section (); \
2370: else if ((flag_pic && RELOC) \
2371: || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)) \
2372: data_section (); \
2373: else \
2374: const_section (); \
2375: } \
2376: else \
2377: const_section (); \
2378: }
2379:
2380: /* Define this macro if references to a symbol must be treated differently
2381: depending on something about the variable or function named by the
2382: symbol (such as what section it is in).
2383:
2384: The macro definition, if any, is executed immediately after the rtl for
2385: DECL has been created and stored in `DECL_RTL (DECL)'. The value of the
2386: rtl will be a `mem' whose address is a `symbol_ref'.
2387:
2388: For the m88k, determine if the item should go in the global pool. */
2389: #define ENCODE_SECTION_INFO(DECL) \
2390: do { \
2391: if (m88k_gp_threshold > 0) \
2392: if (TREE_CODE (DECL) == VAR_DECL) \
2393: { \
2394: if (!TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)) \
2395: { \
2396: int size = int_size_in_bytes (TREE_TYPE (DECL)); \
2397: \
2398: if (size > 0 && size <= m88k_gp_threshold) \
2399: SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1; \
2400: } \
2401: } \
2402: else if (TREE_CODE (DECL) == STRING_CST \
2403: && flag_writable_strings \
2404: && TREE_STRING_LENGTH (DECL) <= m88k_gp_threshold) \
2405: SYMBOL_REF_FLAG (XEXP (TREE_CST_RTL (DECL), 0)) = 1; \
2406: } while (0)
2407:
2408: /* Print operand X (an rtx) in assembler syntax to file FILE.
2409: CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
2410: For `%' followed by punctuation, CODE is the punctuation and X is null. */
2411: #define PRINT_OPERAND_PUNCT_VALID_P(c) \
2412: ((c) == '#' || (c) == '.' || (c) == '!' || (c) == '*' || (c) == ';')
2413:
2414: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
2415:
2416: /* Print a memory address as an operand to reference that memory location. */
2417: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
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