1 /* Definitions of target machine for GNU compiler. Vxworks PowerPC version.
2 Copyright (C) 1996, 2000, 2002, 2003, 2004, 2005, 2007, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by CodeSourcery, LLC.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* Note to future editors: VxWorks is mostly an EABI target. We do
23 not use rs6000/eabi.h because we would have to override most of
24 it anyway. However, if you change that file, consider making
25 analogous changes here too. */
28 #define TARGET_VERSION fprintf (stderr, " (PowerPC VxWorks)");
30 /* CPP predefined macros. */
32 #undef TARGET_OS_CPP_BUILTINS
33 #define TARGET_OS_CPP_BUILTINS() \
36 builtin_define ("__ppc"); \
37 builtin_define ("__PPC__"); \
38 builtin_define ("__EABI__"); \
39 builtin_define ("__ELF__"); \
40 if (!TARGET_SOFT_FLOAT) \
41 builtin_define ("__hardfp"); \
43 /* C89 namespace violation! */ \
44 builtin_define ("CPU_FAMILY=PPC"); \
46 VXWORKS_OS_CPP_BUILTINS (); \
50 /* Only big endian PPC is supported by VxWorks. */
51 #undef BYTES_BIG_ENDIAN
52 #define BYTES_BIG_ENDIAN 1
54 /* We have to kill off the entire specs set created by rs6000/sysv4.h
55 and substitute our own set. The top level vxworks.h has done some
58 #undef SUBTARGET_EXTRA_SPECS
63 #define SUBTARGET_EXTRA_SPECS /* none needed */
65 /* FIXME: The only reason we allow no -mcpu switch at all is because
66 config-ml.in insists on a "." multilib. */
69 %{mcpu=403 : -DCPU=PPC403 ; \
70 mcpu=405 : -DCPU=PPC405 ; \
71 mcpu=440 : -DCPU=PPC440 ; \
72 mcpu=464 : -DCPU=PPC464 ; \
73 mcpu=476 : -DCPU=PPC476 ; \
74 mcpu=603 : -DCPU=PPC603 ; \
75 mcpu=604 : -DCPU=PPC604 ; \
76 mcpu=860 : -DCPU=PPC860 ; \
77 mcpu=8540: -DCPU=PPC85XX ; \
79 VXWORKS_ADDITIONAL_CPP_SPEC
82 "%{G*} %{mno-sdata:-msdata=none} %{msdata:-msdata=default} \
83 %{mlittle|mlittle-endian:-mstrict-align} \
85 %{fvec:-maltivec} %{fvec-eabi:-maltivec -mabi=altivec}"
89 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
90 %{v:-v} %{Qy:} %{!Qn:-Qy} %{Ym,*} %{Yd,*} \
91 %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} -mbig"
94 #define LIB_SPEC VXWORKS_LIB_SPEC
96 #define LINK_SPEC VXWORKS_LINK_SPEC
98 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
100 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
102 /* There is no default multilib. */
103 #undef MULTILIB_DEFAULTS
105 #undef TARGET_DEFAULT
106 #define TARGET_DEFAULT \
107 (MASK_POWERPC | MASK_NEW_MNEMONICS | MASK_EABI | MASK_STRICT_ALIGN)
109 #undef PROCESSOR_DEFAULT
110 #define PROCESSOR_DEFAULT PROCESSOR_PPC604
112 /* Nor sdata, for kernel mode. We use this in
113 SUBSUBTARGET_INITIALIZE_OPTIONS, after rs6000_rtp has been initialized. */
114 #undef SDATA_DEFAULT_SIZE
115 #define SDATA_DEFAULT_SIZE (TARGET_VXWORKS_RTP ? 8 : 0)
117 /* Enforce 16bytes alignment for the stack pointer, to permit general
118 compliance with e.g. Altivec instructions requirements. Make sure
119 this isn't overruled by the EABI constraints. */
121 #undef STACK_BOUNDARY
122 #define STACK_BOUNDARY (16*BITS_PER_UNIT)
124 #undef PREFERRED_STACK_BOUNDARY
125 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
127 #undef ABI_STACK_BOUNDARY
129 /* Make -mcpu=8540 imply SPE. ISEL is automatically enabled, the
130 others must be done by hand. Handle -mrtp. Disable -fPIC
131 for -mrtp - the VxWorks PIC model is not compatible with it. */
132 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
133 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
138 rs6000_spe_abi = 1; \
139 rs6000_float_gprs = 1; \
142 if (!global_options_set.x_g_switch_value) \
143 g_switch_value = SDATA_DEFAULT_SIZE; \
144 VXWORKS_OVERRIDE_OPTIONS; \
147 /* No _mcount profiling on VxWorks. */
148 #undef FUNCTION_PROFILER
149 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)