1 /* Definitions of target machine for GNU compiler. Vxworks PowerPC version.
2 Copyright (C) 1996, 2000, 2002, 2003, 2004, 2005, 2007, 2009, 2010, 2011
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. */
27 /* CPP predefined macros. */
29 #undef TARGET_OS_CPP_BUILTINS
30 #define TARGET_OS_CPP_BUILTINS() \
33 builtin_define ("__ppc"); \
34 builtin_define ("__PPC__"); \
35 builtin_define ("__EABI__"); \
36 builtin_define ("__ELF__"); \
37 if (!TARGET_SOFT_FLOAT) \
38 builtin_define ("__hardfp"); \
40 /* C89 namespace violation! */ \
41 builtin_define ("CPU_FAMILY=PPC"); \
43 VXWORKS_OS_CPP_BUILTINS (); \
47 /* Only big endian PPC is supported by VxWorks. */
48 #undef BYTES_BIG_ENDIAN
49 #define BYTES_BIG_ENDIAN 1
50 #undef WORDS_BIG_ENDIAN
51 #define WORDS_BIG_ENDIAN 1
53 /* We have to kill off the entire specs set created by rs6000/sysv4.h
54 and substitute our own set. The top level vxworks.h has done some
57 #undef SUBTARGET_EXTRA_SPECS
62 #define SUBTARGET_EXTRA_SPECS /* none needed */
64 /* FIXME: The only reason we allow no -mcpu switch at all is because
65 config-ml.in insists on a "." multilib. */
68 %{mcpu=403 : -DCPU=PPC403 ; \
69 mcpu=405 : -DCPU=PPC405 ; \
70 mcpu=440 : -DCPU=PPC440 ; \
71 mcpu=464 : -DCPU=PPC464 ; \
72 mcpu=476 : -DCPU=PPC476 ; \
73 mcpu=603 : -DCPU=PPC603 ; \
74 mcpu=604 : -DCPU=PPC604 ; \
75 mcpu=860 : -DCPU=PPC860 ; \
76 mcpu=8540: -DCPU=PPC85XX ; \
78 VXWORKS_ADDITIONAL_CPP_SPEC
81 "%{G*} %{mno-sdata:-msdata=none} %{msdata:-msdata=default} \
82 %{mlittle|mlittle-endian:-mstrict-align}"
86 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
87 %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} -mbig"
90 #define LIB_SPEC VXWORKS_LIB_SPEC
92 #define LINK_SPEC VXWORKS_LINK_SPEC
94 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
96 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
98 /* There is no default multilib. */
99 #undef MULTILIB_DEFAULTS
101 #undef TARGET_DEFAULT
102 #define TARGET_DEFAULT \
103 (MASK_POWERPC | MASK_NEW_MNEMONICS | MASK_EABI | MASK_STRICT_ALIGN)
105 #undef PROCESSOR_DEFAULT
106 #define PROCESSOR_DEFAULT PROCESSOR_PPC604
108 /* Nor sdata, for kernel mode. We use this in
109 SUBSUBTARGET_INITIALIZE_OPTIONS, after rs6000_rtp has been initialized. */
110 #undef SDATA_DEFAULT_SIZE
111 #define SDATA_DEFAULT_SIZE (TARGET_VXWORKS_RTP ? 8 : 0)
113 /* Enforce 16bytes alignment for the stack pointer, to permit general
114 compliance with e.g. Altivec instructions requirements. Make sure
115 this isn't overruled by the EABI constraints. */
117 #undef STACK_BOUNDARY
118 #define STACK_BOUNDARY (16*BITS_PER_UNIT)
120 #undef PREFERRED_STACK_BOUNDARY
121 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
123 #undef ABI_STACK_BOUNDARY
125 /* Make -mcpu=8540 imply SPE. ISEL is automatically enabled, the
126 others must be done by hand. Handle -mrtp. Disable -fPIC
127 for -mrtp - the VxWorks PIC model is not compatible with it. */
128 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
129 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
134 rs6000_spe_abi = 1; \
135 rs6000_float_gprs = 1; \
138 if (!global_options_set.x_g_switch_value) \
139 g_switch_value = SDATA_DEFAULT_SIZE; \
140 VXWORKS_OVERRIDE_OPTIONS; \
143 /* No _mcount profiling on VxWorks. */
144 #undef FUNCTION_PROFILER
145 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)