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comparison gcc/config/m32r/m32r-opts.h @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* Definitions for option handling for Renesas M32R cpu.
2 Copyright (C) 1996-2017 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 it
7 under the terms of the GNU General Public License as published
8 by the Free Software Foundation; either version 3, or (at your
9 option) any later version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 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 #ifndef M32R_OPTS_H
21 #define M32R_OPTS_H
22
23 /* Code Models
24
25 Code models are used to select between two choices of two separate
26 possibilities (address space size, call insn to use):
27
28 small: addresses use 24 bits, use bl to make calls
29 medium: addresses use 32 bits, use bl to make calls (*1)
30 large: addresses use 32 bits, use seth/add3/jl to make calls (*2)
31
32 The fourth is "addresses use 24 bits, use seth/add3/jl to make calls" but
33 using this one doesn't make much sense.
34
35 (*1) The linker may eventually be able to relax seth/add3 -> ld24.
36 (*2) The linker may eventually be able to relax seth/add3/jl -> bl.
37
38 Internally these are recorded as TARGET_ADDR{24,32} and
39 TARGET_CALL{26,32}.
40
41 The __model__ attribute can be used to select the code model to use when
42 accessing particular objects. */
43
44 enum m32r_model { M32R_MODEL_SMALL, M32R_MODEL_MEDIUM, M32R_MODEL_LARGE };
45
46 #define TARGET_MODEL_SMALL (m32r_model_selected == M32R_MODEL_SMALL)
47 #define TARGET_MODEL_MEDIUM (m32r_model_selected == M32R_MODEL_MEDIUM)
48 #define TARGET_MODEL_LARGE (m32r_model_selected == M32R_MODEL_LARGE)
49 #define TARGET_ADDR24 (m32r_model_selected == M32R_MODEL_SMALL)
50 #define TARGET_ADDR32 (! TARGET_ADDR24)
51 #define TARGET_CALL26 (! TARGET_CALL32)
52 #define TARGET_CALL32 (m32r_model_selected == M32R_MODEL_LARGE)
53
54 /* The default is the small model. */
55 #ifndef M32R_MODEL_DEFAULT
56 #define M32R_MODEL_DEFAULT M32R_MODEL_SMALL
57 #endif
58
59 /* Small Data Area
60
61 The SDA consists of sections .sdata, .sbss, and .scommon.
62 .scommon isn't a real section, symbols in it have their section index
63 set to SHN_M32R_SCOMMON, though support for it exists in the linker script.
64
65 Two switches control the SDA:
66
67 -G NNN - specifies the maximum size of variable to go in the SDA
68
69 -msdata=foo - specifies how such variables are handled
70
71 -msdata=none - small data area is disabled
72
73 -msdata=sdata - small data goes in the SDA, special code isn't
74 generated to use it, and special relocs aren't
75 generated
76
77 -msdata=use - small data goes in the SDA, special code is generated
78 to use the SDA and special relocs are generated
79
80 The SDA is not multilib'd, it isn't necessary.
81 MULTILIB_EXTRA_OPTS is set in tmake_file to -msdata=sdata so multilib'd
82 libraries have small data in .sdata/SHN_M32R_SCOMMON so programs that use
83 -msdata=use will successfully link with them (references in header files
84 will cause the compiler to emit code that refers to library objects in
85 .data). ??? There can be a problem if the user passes a -G value greater
86 than the default and a library object in a header file is that size.
87 The default is 8 so this should be rare - if it occurs the user
88 is required to rebuild the libraries or use a smaller value for -G. */
89
90 /* Maximum size of variables that go in .sdata/.sbss.
91 The -msdata=foo switch also controls how small variables are handled. */
92 #ifndef SDATA_DEFAULT_SIZE
93 #define SDATA_DEFAULT_SIZE 8
94 #endif
95
96 enum m32r_sdata { M32R_SDATA_NONE, M32R_SDATA_SDATA, M32R_SDATA_USE };
97
98 #define TARGET_SDATA_NONE (m32r_sdata_selected == M32R_SDATA_NONE)
99 #define TARGET_SDATA_SDATA (m32r_sdata_selected == M32R_SDATA_SDATA)
100 #define TARGET_SDATA_USE (m32r_sdata_selected == M32R_SDATA_USE)
101
102 /* Default is to disable the SDA
103 [for upward compatibility with previous toolchains]. */
104 #ifndef M32R_SDATA_DEFAULT
105 #define M32R_SDATA_DEFAULT M32R_SDATA_NONE
106 #endif
107
108 #endif