1 /* Common hooks for IBM S/390 and zSeries.
2 Copyright (C) 1999-2019 Free Software Foundation, Inc.
4 This file is part of GCC.
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
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
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/>. */
22 #include "coretypes.h"
23 #include "diagnostic-core.h"
25 #include "common/common-target.h"
26 #include "common/common-target-def.h"
30 EXPORTED_CONST
int processor_flags_table
[] =
32 /* z900 */ PF_IEEE_FLOAT
| PF_ZARCH
,
33 /* z990 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
,
34 /* z9-109 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
36 /* z9-ec */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
38 /* z10 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
39 | PF_EXTIMM
| PF_DFP
| PF_Z10
,
40 /* z196 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
41 | PF_EXTIMM
| PF_DFP
| PF_Z10
| PF_Z196
,
42 /* zEC12 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
43 | PF_EXTIMM
| PF_DFP
| PF_Z10
| PF_Z196
| PF_ZEC12
| PF_TX
,
44 /* z13 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
45 | PF_EXTIMM
| PF_DFP
| PF_Z10
| PF_Z196
| PF_ZEC12
| PF_TX
47 /* z14 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
48 | PF_EXTIMM
| PF_DFP
| PF_Z10
| PF_Z196
| PF_ZEC12
| PF_TX
49 | PF_Z13
| PF_VX
| PF_VXE
| PF_Z14
,
50 /* z15 */ PF_IEEE_FLOAT
| PF_ZARCH
| PF_LONG_DISPLACEMENT
51 | PF_EXTIMM
| PF_DFP
| PF_Z10
| PF_Z196
| PF_ZEC12
| PF_TX
52 | PF_Z13
| PF_VX
| PF_VXE
| PF_Z14
| PF_VXE2
| PF_Z15
55 /* Change optimizations to be performed, depending on the
56 optimization level. */
58 static const struct default_options s390_option_optimization_table
[] =
60 /* Enable -fsched-pressure by default when optimizing. */
61 { OPT_LEVELS_1_PLUS
, OPT_fsched_pressure
, NULL
, 1 },
63 /* ??? There are apparently still problems with -fcaller-saves. */
64 { OPT_LEVELS_ALL
, OPT_fcaller_saves
, NULL
, 0 },
66 /* Use MVCLE instructions to decrease code size if requested. */
67 { OPT_LEVELS_SIZE
, OPT_mmvcle
, NULL
, 1 },
69 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
72 /* Implement TARGET_OPTION_INIT_STRUCT. */
75 s390_option_init_struct (struct gcc_options
*opts
)
77 /* By default, always emit DWARF-2 unwind info. This allows debugging
78 without maintaining a stack frame back-chain. */
79 opts
->x_flag_asynchronous_unwind_tables
= 1;
81 /* Enable section anchors by default. */
82 opts
->x_flag_section_anchors
= 1;
85 /* Implement TARGET_HANDLE_OPTION. */
88 s390_handle_option (struct gcc_options
*opts ATTRIBUTE_UNUSED
,
89 struct gcc_options
*opts_set ATTRIBUTE_UNUSED
,
90 const struct cl_decoded_option
*decoded
,
93 size_t code
= decoded
->opt_index
;
94 int value
= decoded
->value
;
98 case OPT_mstack_guard_
:
99 if (value
!= 0 && exact_log2 (value
) == -1)
100 error_at (loc
, "stack guard value must be an exact power of 2");
103 case OPT_mstack_size_
:
104 if (value
!= 0 && exact_log2 (value
) == -1)
105 error_at (loc
, "stack size must be an exact power of 2");
113 /* -fsplit-stack uses a field in the TCB, available with glibc-2.23.
114 We don't verify it, since earlier versions just have padding at
115 its place, which works just as well. */
118 s390_supports_split_stack (bool report ATTRIBUTE_UNUSED
,
119 struct gcc_options
*opts ATTRIBUTE_UNUSED
)
124 #undef TARGET_DEFAULT_TARGET_FLAGS
125 #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT)
127 #undef TARGET_HANDLE_OPTION
128 #define TARGET_HANDLE_OPTION s390_handle_option
130 #undef TARGET_OPTION_OPTIMIZATION_TABLE
131 #define TARGET_OPTION_OPTIMIZATION_TABLE s390_option_optimization_table
133 #undef TARGET_OPTION_INIT_STRUCT
134 #define TARGET_OPTION_INIT_STRUCT s390_option_init_struct
136 #undef TARGET_SUPPORTS_SPLIT_STACK
137 #define TARGET_SUPPORTS_SPLIT_STACK s390_supports_split_stack
139 struct gcc_targetm_common targetm_common
= TARGETM_COMMON_INITIALIZER
;