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1 /* Definitions of target machine for GNU compiler, for Alpha Linux-based GNU
3 Copyright (C) 1996, 1997 Free Software Foundation, Inc.
4 Contributed by Bob Manson.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #define TARGET_DEFAULT (3 | MASK_GAS)
26 #define TARGET_VERSION fprintf (stderr, " (GNU/Linux/Alpha)");
29 #define CPP_PREDEFINES "\
30 -D__alpha -D__alpha__ -D__linux__ -D__linux -D_LONGLONG -Dlinux -Dunix \
31 -Asystem(linux) -Acpu(alpha) -Amachine(alpha)"
33 /* We don't actually need any of these; the MD_ vars are ignored
34 anyway for cross-compilers, and the other specs won't get picked up
35 because the user is supposed to do ld -r (hmm, perhaps that should be
36 the default). In any case, setting them thus will catch some
37 common user errors. */
40 #undef MD_STARTFILE_PREFIX
43 #define LIB_SPEC "%{pg:-lgmon} %{pg:-lc_p} %{!pg:-lc}"
46 #define LINK_SPEC "-G 8 %{O*:-O3} %{!O*:-O1}"
49 #define ASM_SPEC "-nocpp"
52 #undef SDB_DEBUGGING_INFO
55 #undef PREFERRED_DEBUGGING_TYPE
56 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
58 #undef FUNCTION_PROFILER
59 #define FUNCTION_PROFILER(FILE, LABELNO) \
60 fputs ("\tjsr $28,_mcount\n", (FILE))
62 /* Generate calls to memcpy, etc., not bcopy, etc. */
63 #define TARGET_MEM_FUNCTIONS
65 /* Show that we need a GP when profiling. */
66 #define TARGET_PROFILING_NEEDS_GP
68 /* We support #pragma. */
69 #define HANDLE_SYSV_PRAGMA
73 /* Emit RTL insns to initialize the variable parts of a trampoline.
74 FNADDR is an RTX for the address of the function's pure code.
75 CXT is an RTX for the static chain value for the function.
77 This differs from the standard version in that:
79 We do not initialize the "hint" field because it only has an 8k
80 range and so the target is in range of something on the stack.
81 Omitting the hint saves a bogus branch-prediction cache line load.
83 GNU/Linux always has an executable stack -- no need for a system call. */
85 #undef INITIALIZE_TRAMPOLINE
86 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
90 _addr = memory_address (Pmode, plus_constant ((TRAMP), 16)); \
91 emit_move_insn (gen_rtx (MEM, Pmode, _addr), (FNADDR)); \
92 _addr = memory_address (Pmode, plus_constant ((TRAMP), 24)); \
93 emit_move_insn (gen_rtx (MEM, Pmode, _addr), (CXT)); \
95 emit_insn (gen_rtx (UNSPEC_VOLATILE, VOIDmode, \
96 gen_rtvec (1, const0_rtx), 0)); \