1 /* Definitions of target machine for GNU compiler, for DEC Alpha on
3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010
5 Free Software Foundation, Inc.
6 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
8 This file is part of GCC.
10 GCC 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 3, or (at your option)
15 GCC 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.
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
24 /* As of DEC OSF/1 V4.0, as can subtract adjacent labels. */
26 #undef TARGET_AS_CAN_SUBTRACT_LABELS
27 #define TARGET_AS_CAN_SUBTRACT_LABELS 1
29 /* The GEM libraries for X_float are present, though not used by C. */
31 #undef TARGET_HAS_XFLOATING_LIBS
32 #define TARGET_HAS_XFLOATING_LIBS 1
34 /* Tru64 UNIX V5.1 uses IEEE QUAD format. */
36 #define TARGET_DEFAULT (MASK_FPREGS | MASK_LONG_DOUBLE_128)
38 /* The linker appears to perform invalid code optimizations that result
39 in the ldgp emitted for the exception_receiver pattern being incorrectly
41 #undef TARGET_LD_BUGGY_LDGP
42 #define TARGET_LD_BUGGY_LDGP 1
44 /* Tru64 UNIX V5.1 has the float and long double forms of math functions. */
45 #undef TARGET_C99_FUNCTIONS
46 #define TARGET_C99_FUNCTIONS 1
48 /* Names to predefine in the preprocessor for this target machine. */
50 #define TARGET_OS_CPP_BUILTINS() \
52 builtin_define_std ("unix"); \
53 builtin_define_std ("SYSTYPE_BSD"); \
54 builtin_define ("_SYSTYPE_BSD"); \
55 builtin_define ("__osf__"); \
56 builtin_define ("__digital__"); \
57 builtin_define ("__arch64__"); \
58 builtin_define ("_LONGLONG"); \
59 builtin_assert ("system=unix"); \
60 builtin_assert ("system=xpg4"); \
61 /* Tru64 UNIX V5 has a 16 byte long \
62 double type and requires __X_FLOAT \
63 to be defined for <math.h>. */ \
64 if (LONG_DOUBLE_TYPE_SIZE == 128) \
65 builtin_define ("__X_FLOAT"); \
67 /* Tru64 UNIX V4/V5 provide several ISO C94 \
68 features protected by the corresponding \
69 __STDC_VERSION__ macro. libstdc++ v3 \
70 needs them as well. */ \
71 if (c_dialect_cxx ()) \
72 builtin_define ("__STDC_VERSION__=199409L"); \
75 /* Accept DEC C flags for multithreaded programs. We use _PTHREAD_USE_D4
76 instead of PTHREAD_USE_D4 since both have the same effect and the former
77 doesn't invade the users' namespace. */
81 "%{pthread|threads:-D_REENTRANT} %{threads:-D_PTHREAD_USE_D4}"
83 /* Under DEC OSF/1 V4, -p and -pg require -lprof1, and -lprof1 requires
87 "%{p|pg:-lprof1%{pthread|threads:_r} -lpdf} %{a:-lprof2} \
88 %{threads: -lpthreads} %{pthread|threads: -lpthread -lmach -lexc} -lc"
90 /* Pass "-G 8" to ld because Alpha's CC does. Pass -O3 if we are
91 optimizing, -O1 if we are not. Pass -S to silence `weak symbol
92 multiply defined' warnings. Pass -shared, -non_shared or
93 -call_shared as appropriate. Pass -hidden_symbol so that our
94 constructor and call-frame data structures are not accidentally
97 "-G 8 %{O*:-O3} %{!O*:-O1} -S %{static:-non_shared} \
98 %{!static:%{shared:-shared -hidden_symbol _GLOBAL_*} \
99 %{!shared:-call_shared}} %{pg} %{taso} %{rpath*}"
101 #define STARTFILE_SPEC \
102 "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}"
104 #define ENDFILE_SPEC \
105 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
107 #define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/"
109 /* In Tru64 UNIX V5.1, Compaq introduced a new assembler
110 (/usr/lib/cmplrs/cc/adu) which currently (versions between 3.04.29 and
111 3.04.32) breaks mips-tfile. Passing the undocumented -oldas flag reverts
112 to using the old assembler (/usr/lib/cmplrs/cc/as[01]).
114 It is clearly not desirable to depend on this undocumented flag, and
115 Compaq wants -oldas to go away soon, but until they have released a
116 new adu that works with mips-tfile, this is the only option.
118 In some versions of the DTK, the assembler driver invokes ld after
119 assembly. This has been fixed in current versions, but adding -c
120 works as expected for all versions. */
122 #define ASM_OLDAS_SPEC "-oldas -c"
124 /* In OSF/1 v3.2c, the assembler by default does not output file names which
125 causes mips-tfile to fail. Passing -g to the assembler fixes this problem.
126 ??? Strictly speaking, we need -g only if the user specifies -g. Passing
127 it always means that we get slightly larger than necessary object files
128 if the user does not specify -g. If we don't pass -g, then mips-tfile
129 will need to be fixed to work in this case. Pass -O0 since some
130 optimization are broken and don't help us anyway. Pass -nocpp because
131 there's no point in running CPP on our assembler output. */
132 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0
133 #define ASM_SPEC "%{malpha-as:-g " ASM_OLDAS_SPEC " -nocpp %{pg} -O0}"
135 #define ASM_SPEC "%{!mgas:-g " ASM_OLDAS_SPEC " -nocpp %{pg} -O0}"
138 /* Specify to run a post-processor, mips-tfile after the assembler
139 has run to stuff the ecoff debug information into the object file.
140 This is needed because the Alpha assembler provides no way
141 of specifying such information in the assembly file. */
143 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0
145 #define ASM_FINAL_SPEC "\
146 %{malpha-as: %{!mno-mips-tfile: \
147 \n mips-tfile %{v*: -v} \
149 %{!K: %{save-temps: -I %b.o~}} \
150 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
151 %{,assembler:%i;:%g.s}}}"
154 #define ASM_FINAL_SPEC "\
155 %{!mgas: %{!mno-mips-tfile: \
156 \n mips-tfile %{v*: -v} \
158 %{!K: %{save-temps: -I %b.o~}} \
159 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
160 %{,assembler:%i;:%g.s}}}"
164 /* Indicate that we have a stamp.h to use. */
165 #ifndef CROSS_DIRECTORY_STRUCTURE
166 #define HAVE_STAMP_H 1
169 /* Attempt to turn on access permissions for the stack. */
171 #define ENABLE_EXECUTE_STACK \
173 __enable_execute_stack (void *addr) \
175 extern int mprotect (const void *, size_t, int); \
176 long size = getpagesize (); \
177 long mask = ~(size-1); \
178 char *page = (char *) (((long) addr) & mask); \
179 char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
181 /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \
182 if (mprotect (page, end - page, 7) < 0) \
183 perror ("mprotect of trampoline code"); \
186 /* Digital UNIX V4.0E (1091)/usr/include/sys/types.h 4.3.49.9 1997/08/14 */
187 #define SIZE_TYPE "long unsigned int"
188 #define PTRDIFF_TYPE "long int"
190 #define SIG_ATOMIC_TYPE "int"
192 #define INT8_TYPE "signed char"
193 #define INT16_TYPE "short int"
194 #define INT32_TYPE "int"
195 #define INT64_TYPE "long int"
196 #define UINT8_TYPE "unsigned char"
197 #define UINT16_TYPE "short unsigned int"
198 #define UINT32_TYPE "unsigned int"
199 #define UINT64_TYPE "long unsigned int"
201 #define INT_LEAST8_TYPE "signed char"
202 #define INT_LEAST16_TYPE "short int"
203 #define INT_LEAST32_TYPE "int"
204 #define INT_LEAST64_TYPE "long int"
205 #define UINT_LEAST8_TYPE "unsigned char"
206 #define UINT_LEAST16_TYPE "short unsigned int"
207 #define UINT_LEAST32_TYPE "unsigned int"
208 #define UINT_LEAST64_TYPE "long unsigned int"
210 #define INT_FAST8_TYPE "signed char"
211 #define INT_FAST16_TYPE "int"
212 #define INT_FAST32_TYPE "int"
213 #define INT_FAST64_TYPE "long int"
214 #define UINT_FAST8_TYPE "unsigned char"
215 #define UINT_FAST16_TYPE "unsigned int"
216 #define UINT_FAST32_TYPE "unsigned int"
217 #define UINT_FAST64_TYPE "long unsigned int"
219 #define INTPTR_TYPE "long int"
220 #define UINTPTR_TYPE "long unsigned int"
222 /* The linker will stick __main into the .init section. */
223 #define HAS_INIT_SECTION
224 #define LD_INIT_SWITCH "-init"
225 #define LD_FINI_SWITCH "-fini"
227 /* Select a format to encode pointers in exception handling data. CODE
228 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
229 true if the symbol may be affected by dynamic relocations.
231 We really ought to be using the SREL32 relocations that ECOFF has,
232 but no version of the native assembler supports creating such things,
233 and Compaq has no plans to rectify this. Worse, the dynamic loader
234 cannot handle unaligned relocations, so we have to make sure that
235 things get padded appropriately. */
236 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
238 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
241 /* This is how we tell the assembler that a symbol is weak. */
243 #define ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, VALUE) \
246 (*targetm.asm_out.globalize_label) (FILE, NAME); \
247 fputs ("\t.weakext\t", FILE); \
248 assemble_name (FILE, NAME); \
252 assemble_name (FILE, VALUE); \
254 fputc ('\n', FILE); \
258 #define ASM_WEAKEN_LABEL(FILE, NAME) ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, 0)
260 /* The native assembler doesn't understand parenthesis. */
261 #define TARGET_ASM_OPEN_PAREN ""
262 #define TARGET_ASM_CLOSE_PAREN ""
264 /* Handle #pragma weak and #pragma pack. */
265 #define HANDLE_SYSV_PRAGMA 1
267 /* Handle #pragma extern_prefix. */
268 #define TARGET_HANDLE_PRAGMA_EXTERN_PREFIX 1