1 /* Output variables, constants and external declarations, for GNU compiler.
2 Copyright (C) 1996, 1997 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
23 /* This enables certain macros in alpha.h, which will make an indirect
24 reference to an external symbol an invalid address. This needs to be
25 defined before we include alpha.h, since it determines which macros
26 are used for GO_IF_*. */
28 #define NO_EXTERNAL_INDIRECT_ADDRESS
30 #include "alpha/alpha.h"
33 #define CPP_PREDEFINES \
34 "-Dalpha -D__ALPHA -Dvms -DVMS -D__alpha__ -D__alpha -D__vms__ -D__VMS__\
35 -Asystem(vms) -Acpu(alpha) -Amachine(alpha)"
39 %{mfloat-ieee:-D__IEEE_FLOAT} \
40 %{mfloat-vax:-D__G_FLOAT} \
41 %{!mfloat-vax:-D__IEEE_FLOAT} \
42 %{!.S: -D__LANGUAGE_C__ -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}} \
43 %{.S: -D__LANGUAGE_ASSEMBLY__ -D__LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
44 %{.cc: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
45 %{.cxx: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
46 %{.C: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
47 %{.m: -D__LANGUAGE_OBJECTIVE_C__ -D__LANGUAGE_OBJECTIVE_C}"
49 /* Under OSF4, -p and -pg require -lprof1, and -lprof1 requires -lpdf. */
51 #define LIB_SPEC "%{p:-lprof1 -lpdf} %{pg:-lprof1 -lpdf} %{a:-lprof2} -lc"
53 /* Pass "-G 8" to ld because Alpha's CC does. Pass -O3 if we are
54 optimizing, -O1 if we are not. Pass -shared, -non_shared or
55 -call_shared as appropriate. Also pass -pg. */
57 "-G 8 %{O*:-O3} %{!O*:-O1} %{static:-non_shared} \
58 %{!static:%{shared:-shared} %{!shared:-call_shared}} %{pg} %{taso} \
61 /* We allow $'s in identifiers unless -ansi is used .. */
63 #define DOLLARS_IN_IDENTIFIERS 2
65 /* These match the definitions used in DECCRTL, the VMS C run-time library
67 #define SIZE_TYPE "unsigned int"
68 #define PTRDIFF_TYPE "int"
71 /* Use memcpy for structure copying, and so forth. */
72 #define TARGET_MEM_FUNCTIONS
74 /* By default, allow $ to be part of an identifier. */
75 #define DOLLARS_IN_IDENTIFIERS 2
78 #define TARGET_DEFAULT (MASK_FP|MASK_FPREGS|MASK_GAS|MASK_OPEN_VMS)
80 #define TARGET_NAME "OpenVMS/Alpha"
82 #define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME);
84 /* The structure return address arrives as an "argument" on VMS. */
85 #undef STRUCT_VALUE_REGNUM
86 #define STRUCT_VALUE 0
87 #undef PCC_STATIC_STRUCT_RETURN
89 /* no floating emulation. */
90 #undef REAL_ARITHMETIC
92 /* "long" is 32 bits. */
94 #define LONG_TYPE_SIZE 32
96 /* Pointer is 32 bits but the hardware has 64-bit addresses, sign extended. */
98 #define POINTER_SIZE 32
99 #define POINTERS_EXTEND_UNSIGNED 0
101 #define MAX_OFILE_ALIGNMENT 524288 /* 8 x 2^16 by DEC Ada Test CD40VRA */
103 #undef FIXED_REGISTERS
104 #define FIXED_REGISTERS \
105 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
106 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
107 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
108 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }
110 #undef CALL_USED_REGISTERS
111 #define CALL_USED_REGISTERS \
112 {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
113 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
114 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
115 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
117 #undef HARD_FRAME_POINTER_REGNUM
118 #define HARD_FRAME_POINTER_REGNUM 29
121 #define CAN_ELIMINATE(FROM, TO) \
122 ((TO) != STACK_POINTER_REGNUM || ! alpha_using_fp ())
124 #undef INITIAL_ELIMINATION_OFFSET
125 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
126 { if ((FROM) == FRAME_POINTER_REGNUM) \
127 (OFFSET) = alpha_sa_size () + alpha_pv_save_size (); \
128 else if ((FROM) == ARG_POINTER_REGNUM) \
129 (OFFSET) = (ALPHA_ROUND (alpha_sa_size () + alpha_pv_save_size () \
130 + get_frame_size () \
131 + current_function_pretend_args_size) \
132 - current_function_pretend_args_size); \
133 if ((TO) == STACK_POINTER_REGNUM) \
134 (OFFSET) += ALPHA_ROUND (current_function_outgoing_args_size); \
137 /* Define a data type for recording info about an argument list
138 during the scan of that argument list. This data type should
139 hold all necessary information about the function itself
140 and about the args processed so far, enough to enable macros
141 such as FUNCTION_ARG to determine where the next arg should go.
143 On Alpha/VMS, this is a structure that contains the number of
144 arguments and, for each argument, the datatype of that argument.
146 The number of arguments is a number of words of arguments scanned so far.
147 Thus 6 or more means all following args should go on the stack. */
149 enum avms_arg_type {I64, FF, FD, FG, FS, FT};
150 typedef struct {char num_args; enum avms_arg_type atypes[6];} avms_arg_info;
152 #undef CUMULATIVE_ARGS
153 #define CUMULATIVE_ARGS avms_arg_info
155 /* Initialize a variable CUM of type CUMULATIVE_ARGS
156 for a call to a function whose data type is FNTYPE.
157 For a library call, FNTYPE is 0. */
159 #undef INIT_CUMULATIVE_ARGS
160 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
161 (CUM).num_args = 0; \
162 (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \
163 (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;
165 /* Update the data in CUM to advance over an argument
166 of mode MODE and data type TYPE.
167 (TYPE is null for libcalls where that information may not be available.) */
169 extern enum avms_arg_type alpha_arg_type ();
171 /* Determine where to put an argument to a function.
172 Value is zero to push the argument on the stack,
173 or a hard register in which to store the argument.
175 MODE is the argument's machine mode (or VOIDmode for no more args).
176 TYPE is the data type of the argument (as a tree).
177 This is null for libcalls where that information may
179 CUM is a variable of type CUMULATIVE_ARGS which gives info about
180 the preceding args and about the function being called.
181 NAMED is nonzero if this argument is a named parameter
182 (otherwise it is an extra parameter matching an ellipsis).
184 On Alpha the first 6 words of args are normally in registers
185 and the rest are pushed. */
187 extern struct rtx_def *alpha_arg_info_reg_val ();
189 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
190 ((MODE) == VOIDmode ? alpha_arg_info_reg_val (CUM) \
191 : ((CUM.num_args) < 6 && ! MUST_PASS_IN_STACK (MODE, TYPE) \
192 ? gen_rtx(REG, (MODE), \
193 ((CUM).num_args + 16 \
195 && (GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT \
196 || GET_MODE_CLASS (MODE) == MODE_FLOAT)) \
200 #undef FUNCTION_ARG_ADVANCE
201 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
202 if (MUST_PASS_IN_STACK (MODE, TYPE)) \
203 (CUM).num_args += 6; \
206 if ((CUM).num_args < 6) \
207 (CUM).atypes[(CUM).num_args] = alpha_arg_type (MODE); \
209 (CUM).num_args += ALPHA_ARG_SIZE (MODE, TYPE, NAMED); \
212 /* For an arg passed partly in registers and partly in memory,
213 this is the number of registers used.
214 For args passed entirely in registers or entirely in memory, zero. */
216 #undef FUNCTION_ARG_PARTIAL_NREGS
217 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
218 ((CUM).num_args < 6 && 6 < (CUM).num_args \
219 + ALPHA_ARG_SIZE (MODE, TYPE, NAMED) \
220 ? 6 - (CUM).num_args : 0)
222 /* Perform any needed actions needed for a function that is receiving a
223 variable number of arguments.
225 CUM is as for INIT_CUMULATIVE_ARGS.
227 MODE and TYPE are the mode and type of the current parameter.
229 PRETEND_SIZE is a variable that should be set to the amount of stack
230 that must be pushed by the prolog to pretend that our caller pushed
233 Normally, this macro will push all remaining incoming registers on the
234 stack and set PRETEND_SIZE to the length of the registers pushed.
236 For VMS, we allocate space for all 6 arg registers plus a count.
238 However, if NO registers need to be saved, don't allocate any space.
239 This is not only because we won't need the space, but because AP includes
240 the current_pretend_args_size and we don't want to mess up any
241 ap-relative addresses already made. */
243 #undef SETUP_INCOMING_VARARGS
244 #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
245 { if ((CUM).num_args < 6) \
249 emit_move_insn (gen_rtx (REG, DImode, 1), \
250 virtual_incoming_args_rtx); \
251 emit_insn (gen_arg_home ()); \
254 PRETEND_SIZE = 7 * UNITS_PER_WORD; \
258 #undef ASM_FILE_START
259 #define ASM_FILE_START(FILE) \
261 alpha_write_verstamp (FILE); \
262 fprintf (FILE, "\t.set noreorder\n"); \
263 fprintf (FILE, "\t.set volatile\n"); \
264 ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename); \
267 #undef ASM_OUTPUT_FLOAT
268 #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
270 if (REAL_VALUE_ISINF (VALUE) \
271 || REAL_VALUE_ISNAN (VALUE) \
272 || REAL_VALUE_MINUS_ZERO (VALUE)) \
275 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
276 fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \
281 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
282 fprintf (FILE, "\t.%c_floating %s\n", (TARGET_FLOAT_VAX)?'f':'s', str); \
286 #define LINK_SECTION_ASM_OP ".link"
287 #define READONLY_SECTION_ASM_OP ".rdata"
288 #define LITERALS_SECTION_ASM_OP ".literals"
290 #undef EXTRA_SECTIONS
291 #define EXTRA_SECTIONS in_link, in_rdata, in_literals
293 #undef EXTRA_SECTION_FUNCTIONS
294 #define EXTRA_SECTION_FUNCTIONS \
296 readonly_section () \
298 if (in_section != in_rdata) \
300 fprintf (asm_out_file, "%s\n", READONLY_SECTION_ASM_OP); \
301 in_section = in_rdata; \
307 if (in_section != in_link) \
309 fprintf (asm_out_file, "%s\n", LINK_SECTION_ASM_OP); \
310 in_section = in_link; \
314 literals_section () \
316 if (in_section != in_literals) \
318 fprintf (asm_out_file, "%s\n", LITERALS_SECTION_ASM_OP); \
319 in_section = in_literals; \
323 #undef ASM_OUTPUT_ADDR_DIFF_ELT
324 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) abort ()
326 #undef ASM_OUTPUT_ADDR_VEC_ELT
327 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
328 fprintf (FILE, "\t.quad $L%d\n", (VALUE))
330 #undef READONLY_DATA_SECTION
331 #define READONLY_DATA_SECTION readonly_section
333 #define ASM_FILE_END(FILE) alpha_write_linkage (FILE);
335 #undef CASE_VECTOR_MODE
336 #define CASE_VECTOR_MODE DImode
337 #undef CASE_VECTOR_PC_RELATIVE
339 #undef ASM_OUTPUT_CASE_LABEL
340 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
341 { ASM_OUTPUT_ALIGN (FILE, 3); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
343 #define NO_MD_PROTOTYPES
345 /* Output assembler code for a block containing the constant parts
346 of a trampoline, leaving space for the variable parts.
348 The trampoline should set the static chain pointer to value placed
349 into the trampoline and should branch to the specified routine.
350 Note that $27 has been set to the address of the trampoline, so we can
351 use it for addressability of the two data items. Trampolines are always
352 aligned to FUNCTION_BOUNDARY, which is 64 bits. */
354 #undef TRAMPOLINE_TEMPLATE
355 #define TRAMPOLINE_TEMPLATE(FILE) \
357 fprintf (FILE, "\t.quad 0\n"); \
358 fprintf (FILE, "\t.linkage __tramp\n"); \
359 fprintf (FILE, "\t.quad 0\n"); \
362 /* Length in units of the trampoline for entering a nested function. */
364 #undef TRAMPOLINE_SIZE
365 #define TRAMPOLINE_SIZE 32
367 /* Emit RTL insns to initialize the variable parts of a trampoline.
368 FNADDR is an RTX for the address of the function's pure code.
369 CXT is an RTX for the static chain value for the function. */
371 #undef INITIALIZE_TRAMPOLINE
372 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
374 emit_move_insn (gen_rtx (MEM, Pmode, \
375 memory_address (Pmode, \
376 plus_constant ((TRAMP), 16))), \
378 emit_move_insn (gen_rtx (MEM, Pmode, \
379 memory_address (Pmode, \
380 plus_constant ((TRAMP), 24))), \
384 #undef TRANSFER_FROM_TRAMPOLINE
386 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, NAME, ARGS) \
387 (vms_valid_decl_attribute_p (DECL, ATTRIBUTES, NAME, ARGS))
388 extern int vms_valid_decl_attribute_p ();
390 #undef SDB_DEBUGGING_INFO
391 #undef MIPS_DEBUGGING_INFO
392 #undef DBX_DEBUGGING_INFO
394 #define DWARF2_DEBUGGING_INFO
396 /* This is how to output an assembler line
397 that says to advance the location counter
398 to a multiple of 2**LOG bytes. */
400 #undef ASM_OUTPUT_ALIGN
401 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
402 fprintf (FILE, "\t.align %d\n", LOG);
404 #define UNALIGNED_SHORT_ASM_OP ".word"
405 #define UNALIGNED_INT_ASM_OP ".long"
406 #define UNALIGNED_DOUBLE_INT_ASM_OP ".quad"
408 #undef ASM_OUTPUT_ALIGNED_COMMON
409 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
411 fprintf ((FILE), "\t.comm\t"); \
412 assemble_name ((FILE), (NAME)); \
413 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
416 #define ASM_OUTPUT_SECTION(FILE,SECTION) \
417 (strcmp (SECTION, ".text") == 0) \
419 : named_section (NULL_TREE, SECTION, 0), \
420 ASM_OUTPUT_ALIGN (FILE, 0) \
422 #define ASM_OUTPUT_SECTION_NAME(FILE,DECL,NAME,RELOC) \
427 if (DECL && DECL_MACHINE_ATTRIBUTES (DECL) \
428 && lookup_attribute \
429 ("overlaid", DECL_MACHINE_ATTRIBUTES (DECL))) \
430 flags = ",OVR", ovr = 1; \
431 else if (strncmp (NAME,".debug", 6) == 0) \
435 fputc ('\n', (FILE)); \
436 fprintf (FILE, ".section\t%s%s\n", NAME, flags); \
441 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
442 do { literals_section(); \
443 fprintf ((FILE), "\t"); \
444 assemble_name (FILE, LABEL1); \
445 fprintf (FILE, " = "); \
446 assemble_name (FILE, LABEL2); \
447 fprintf (FILE, "\n"); \
450 #undef PREFERRED_DEBUGGING_TYPE
451 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
453 #undef ASM_FORMAT_PRIVATE_NAME
454 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
455 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 12), \
456 sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
458 /* ??? VMS uses different linkage. */
459 #undef ASM_OUTPUT_MI_THUNK
462 #undef ASM_FINAL_SPEC
464 #undef STARTFILE_SPEC
465 #define ASM_SPEC "-nocpp %{pg}"
466 #define LINK_SPEC "%{g3:-g3} %{g0:-g0} %{shared:-shared} %{v:-v}"
468 /* Define the names of the division and modulus functions. */
469 #define DIVSI3_LIBCALL "OTS$DIV_I"
470 #define DIVDI3_LIBCALL "OTS$DIV_L"
471 #define UDIVSI3_LIBCALL "OTS$DIV_UI"
472 #define UDIVDI3_LIBCALL "OTS$DIV_UL"
473 #define MODSI3_LIBCALL "OTS$REM_I"
474 #define MODDI3_LIBCALL "OTS$REM_L"
475 #define UMODSI3_LIBCALL "OTS$REM_UI"
476 #define UMODDI3_LIBCALL "OTS$REM_UL"
478 #define DIR_SEPARATOR ']'