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comparison gcc/common/config/s390/s390-common.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 /* Common hooks for IBM S/390 and zSeries.
2 Copyright (C) 1999-2017 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 under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 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 #include "config.h"
21 #include "system.h"
22 #include "coretypes.h"
23 #include "diagnostic-core.h"
24 #include "tm.h"
25 #include "common/common-target.h"
26 #include "common/common-target-def.h"
27 #include "opts.h"
28 #include "flags.h"
29
30 EXPORTED_CONST int processor_flags_table[] =
31 {
32 /* g5 */ PF_IEEE_FLOAT,
33 /* g6 */ PF_IEEE_FLOAT,
34 /* z900 */ PF_IEEE_FLOAT | PF_ZARCH,
35 /* z990 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT,
36 /* z9-109 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
37 | PF_EXTIMM,
38 /* z9-ec */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
39 | PF_EXTIMM | PF_DFP,
40 /* z10 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
41 | PF_EXTIMM | PF_DFP | PF_Z10,
42 /* z196 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
43 | PF_EXTIMM | PF_DFP | PF_Z10 | PF_Z196,
44 /* zEC12 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
45 | PF_EXTIMM | PF_DFP | PF_Z10 | PF_Z196 | PF_ZEC12 | PF_TX,
46 /* z13 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
47 | PF_EXTIMM | PF_DFP | PF_Z10 | PF_Z196 | PF_ZEC12 | PF_TX
48 | PF_Z13 | PF_VX,
49 /* arch12 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
50 | PF_EXTIMM | PF_DFP | PF_Z10 | PF_Z196 | PF_ZEC12 | PF_TX
51 | PF_Z13 | PF_VX | PF_VXE | PF_ARCH12
52 };
53
54 /* Change optimizations to be performed, depending on the
55 optimization level. */
56
57 static const struct default_options s390_option_optimization_table[] =
58 {
59 { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
60
61 /* Enable -fsched-pressure by default when optimizing. */
62 { OPT_LEVELS_1_PLUS, OPT_fsched_pressure, NULL, 1 },
63
64 /* ??? There are apparently still problems with -fcaller-saves. */
65 { OPT_LEVELS_ALL, OPT_fcaller_saves, NULL, 0 },
66
67 /* Use MVCLE instructions to decrease code size if requested. */
68 { OPT_LEVELS_SIZE, OPT_mmvcle, NULL, 1 },
69
70 { OPT_LEVELS_NONE, 0, NULL, 0 }
71 };
72
73 /* Implement TARGET_OPTION_INIT_STRUCT. */
74
75 static void
76 s390_option_init_struct (struct gcc_options *opts)
77 {
78 /* By default, always emit DWARF-2 unwind info. This allows debugging
79 without maintaining a stack frame back-chain. */
80 opts->x_flag_asynchronous_unwind_tables = 1;
81 }
82
83 /* Implement TARGET_HANDLE_OPTION. */
84
85 bool
86 s390_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
87 struct gcc_options *opts_set ATTRIBUTE_UNUSED,
88 const struct cl_decoded_option *decoded,
89 location_t loc)
90 {
91 size_t code = decoded->opt_index;
92 int value = decoded->value;
93
94 switch (code)
95 {
96 case OPT_mstack_guard_:
97 if (value != 0 && exact_log2 (value) == -1)
98 error_at (loc, "stack guard value must be an exact power of 2");
99 return true;
100
101 case OPT_mstack_size_:
102 if (value != 0 && exact_log2 (value) == -1)
103 error_at (loc, "stack size must be an exact power of 2");
104 return true;
105
106 default:
107 return true;
108 }
109 }
110
111 /* -fsplit-stack uses a field in the TCB, available with glibc-2.23.
112 We don't verify it, since earlier versions just have padding at
113 its place, which works just as well. */
114
115 static bool
116 s390_supports_split_stack (bool report ATTRIBUTE_UNUSED,
117 struct gcc_options *opts ATTRIBUTE_UNUSED)
118 {
119 return true;
120 }
121
122 #undef TARGET_DEFAULT_TARGET_FLAGS
123 #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT)
124
125 #undef TARGET_HANDLE_OPTION
126 #define TARGET_HANDLE_OPTION s390_handle_option
127
128 #undef TARGET_OPTION_OPTIMIZATION_TABLE
129 #define TARGET_OPTION_OPTIMIZATION_TABLE s390_option_optimization_table
130
131 #undef TARGET_OPTION_INIT_STRUCT
132 #define TARGET_OPTION_INIT_STRUCT s390_option_init_struct
133
134 #undef TARGET_SUPPORTS_SPLIT_STACK
135 #define TARGET_SUPPORTS_SPLIT_STACK s390_supports_split_stack
136
137 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;