|
0
|
1 /* Definitions for PA_RISC with ELF format on 64-bit Linux
|
|
|
2 Copyright (C) 1999, 2000, 2002, 2007 Free Software Foundation, Inc.
|
|
|
3
|
|
|
4 This file is part of GCC.
|
|
|
5
|
|
|
6 GCC 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 3, or (at your option)
|
|
|
9 any later version.
|
|
|
10
|
|
|
11 GCC 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.
|
|
|
15
|
|
|
16 You should have received a copy of the GNU General Public License
|
|
|
17 along with GCC; see the file COPYING3. If not see
|
|
|
18 <http://www.gnu.org/licenses/>. */
|
|
|
19
|
|
|
20 #if 0 /* needs some work :-( */
|
|
|
21 /* If defined, this macro specifies a table of register pairs used to
|
|
|
22 eliminate unneeded registers that point into the stack frame. */
|
|
|
23
|
|
|
24 #define ELIMINABLE_REGS \
|
|
|
25 { \
|
|
|
26 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
|
|
|
27 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
|
|
|
28 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
|
|
|
29 }
|
|
|
30
|
|
|
31 /* A C expression that returns nonzero if the compiler is allowed to try to
|
|
|
32 replace register number FROM with register number TO. The frame pointer
|
|
|
33 is automatically handled. */
|
|
|
34
|
|
|
35 #define CAN_ELIMINATE(FROM, TO) 1
|
|
|
36
|
|
|
37 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
|
|
|
38 specifies the initial difference between the specified pair of
|
|
|
39 registers. This macro must be defined if `ELIMINABLE_REGS' is
|
|
|
40 defined. */
|
|
|
41 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
|
|
|
42 do \
|
|
|
43 { \
|
|
|
44 int fsize; \
|
|
|
45 \
|
|
|
46 fsize = compute_frame_size (get_frame_size (), 0); \
|
|
|
47 if ((TO) == FRAME_POINTER_REGNUM \
|
|
|
48 && (FROM) == ARG_POINTER_REGNUM) \
|
|
|
49 { \
|
|
|
50 (OFFSET) = -16; \
|
|
|
51 break; \
|
|
|
52 } \
|
|
|
53 \
|
|
|
54 gcc_assert ((TO) == STACK_POINTER_REGNUM); \
|
|
|
55 \
|
|
|
56 switch (FROM) \
|
|
|
57 { \
|
|
|
58 case FRAME_POINTER_REGNUM: \
|
|
|
59 (OFFSET) = - fsize; \
|
|
|
60 break; \
|
|
|
61 \
|
|
|
62 case ARG_POINTER_REGNUM: \
|
|
|
63 (OFFSET) = - fsize - 16; \
|
|
|
64 break; \
|
|
|
65 \
|
|
|
66 default: \
|
|
|
67 gcc_unreachable (); \
|
|
|
68 } \
|
|
|
69 } while (0)
|
|
|
70 #endif
|
