1 /* Common hooks for IBM RS/6000.
2 Copyright (C) 1991-2014 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 #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 #include "params.h"
30
31 /* Implement TARGET_OPTION_OPTIMIZATION_TABLE. */
32 static const struct default_options rs6000_option_optimization_table[] =
33 {
34 { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
35 { OPT_LEVELS_NONE, 0, NULL, 0 }
36 };
37
38 /* Implement TARGET_OPTION_INIT_STRUCT. */
39
40 static void
rs6000_option_init_struct(struct gcc_options * opts)41 rs6000_option_init_struct (struct gcc_options *opts)
42 {
43 if (DEFAULT_ABI == ABI_DARWIN)
44 /* The Darwin libraries never set errno, so we might as well
45 avoid calling them when that's the only reason we would. */
46 opts->x_flag_errno_math = 0;
47
48 /* Enable section anchors by default. */
49 if (!TARGET_MACHO)
50 opts->x_flag_section_anchors = 1;
51 }
52
53 /* Implement TARGET_OPTION_DEFAULT_PARAMS. */
54
55 static void
rs6000_option_default_params(void)56 rs6000_option_default_params (void)
57 {
58 /* Double growth factor to counter reduced min jump length. */
59 set_default_param_value (PARAM_MAX_GROW_COPY_BB_INSNS, 16);
60 }
61
62 /* If not otherwise specified by a target, make 'long double' equivalent to
63 'double'. */
64
65 #ifndef RS6000_DEFAULT_LONG_DOUBLE_SIZE
66 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 64
67 #endif
68
69 /* Implement TARGET_HANDLE_OPTION. */
70
71 static bool
rs6000_handle_option(struct gcc_options * opts,struct gcc_options * opts_set,const struct cl_decoded_option * decoded,location_t loc)72 rs6000_handle_option (struct gcc_options *opts, struct gcc_options *opts_set,
73 const struct cl_decoded_option *decoded,
74 location_t loc)
75 {
76 enum fpu_type_t fpu_type = FPU_NONE;
77 char *p, *q;
78 size_t code = decoded->opt_index;
79 const char *arg = decoded->arg;
80 int value = decoded->value;
81
82 switch (code)
83 {
84 case OPT_mfull_toc:
85 opts->x_rs6000_isa_flags &= ~OPTION_MASK_MINIMAL_TOC;
86 opts->x_TARGET_NO_FP_IN_TOC = 0;
87 opts->x_TARGET_NO_SUM_IN_TOC = 0;
88 opts_set->x_rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;
89 #ifdef TARGET_USES_SYSV4_OPT
90 /* Note, V.4 no longer uses a normal TOC, so make -mfull-toc, be
91 just the same as -mminimal-toc. */
92 opts->x_rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;
93 opts_set->x_rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;
94 #endif
95 break;
96
97 #ifdef TARGET_USES_SYSV4_OPT
98 case OPT_mtoc:
99 /* Make -mtoc behave like -mminimal-toc. */
100 opts->x_rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;
101 opts_set->x_rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;
102 break;
103 #endif
104
105 #ifdef TARGET_USES_AIX64_OPT
106 case OPT_maix64:
107 #else
108 case OPT_m64:
109 #endif
110 opts->x_rs6000_isa_flags |= OPTION_MASK_POWERPC64;
111 opts->x_rs6000_isa_flags |= (~opts_set->x_rs6000_isa_flags
112 & OPTION_MASK_PPC_GFXOPT);
113 opts_set->x_rs6000_isa_flags |= OPTION_MASK_POWERPC64;
114 break;
115
116 #ifdef TARGET_USES_AIX64_OPT
117 case OPT_maix32:
118 #else
119 case OPT_m32:
120 #endif
121 opts->x_rs6000_isa_flags &= ~OPTION_MASK_POWERPC64;
122 opts_set->x_rs6000_isa_flags |= OPTION_MASK_POWERPC64;
123 break;
124
125 case OPT_mminimal_toc:
126 if (value == 1)
127 {
128 opts->x_TARGET_NO_FP_IN_TOC = 0;
129 opts->x_TARGET_NO_SUM_IN_TOC = 0;
130 }
131 break;
132
133 case OPT_mpowerpc_gpopt:
134 case OPT_mpowerpc_gfxopt:
135 break;
136
137 case OPT_mdebug_:
138 p = ASTRDUP (arg);
139 opts->x_rs6000_debug = 0;
140
141 while ((q = strtok (p, ",")) != NULL)
142 {
143 unsigned mask = 0;
144 bool invert;
145
146 p = NULL;
147 if (*q == '!')
148 {
149 invert = true;
150 q++;
151 }
152 else
153 invert = false;
154
155 if (! strcmp (q, "all"))
156 mask = MASK_DEBUG_ALL;
157 else if (! strcmp (q, "stack"))
158 mask = MASK_DEBUG_STACK;
159 else if (! strcmp (q, "arg"))
160 mask = MASK_DEBUG_ARG;
161 else if (! strcmp (q, "reg"))
162 mask = MASK_DEBUG_REG;
163 else if (! strcmp (q, "addr"))
164 mask = MASK_DEBUG_ADDR;
165 else if (! strcmp (q, "cost"))
166 mask = MASK_DEBUG_COST;
167 else if (! strcmp (q, "target"))
168 mask = MASK_DEBUG_TARGET;
169 else if (! strcmp (q, "builtin"))
170 mask = MASK_DEBUG_BUILTIN;
171 else
172 error_at (loc, "unknown -mdebug-%s switch", q);
173
174 if (invert)
175 opts->x_rs6000_debug &= ~mask;
176 else
177 opts->x_rs6000_debug |= mask;
178 }
179 break;
180
181 #ifdef TARGET_USES_SYSV4_OPT
182 case OPT_mrelocatable:
183 if (value == 1)
184 {
185 opts->x_rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;
186 opts_set->x_rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;
187 opts->x_TARGET_NO_FP_IN_TOC = 1;
188 }
189 break;
190
191 case OPT_mrelocatable_lib:
192 if (value == 1)
193 {
194 opts->x_rs6000_isa_flags |= (OPTION_MASK_RELOCATABLE
195 | OPTION_MASK_MINIMAL_TOC);
196 opts_set->x_rs6000_isa_flags |= (OPTION_MASK_RELOCATABLE
197 | OPTION_MASK_MINIMAL_TOC);
198 opts->x_TARGET_NO_FP_IN_TOC = 1;
199 }
200 else
201 {
202 opts->x_rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE;
203 opts_set->x_rs6000_isa_flags |= OPTION_MASK_RELOCATABLE;
204 }
205 break;
206 #endif
207
208 case OPT_mabi_altivec:
209 /* Enabling the AltiVec ABI turns off the SPE ABI. */
210 opts->x_rs6000_spe_abi = 0;
211 break;
212
213 case OPT_mabi_spe:
214 opts->x_rs6000_altivec_abi = 0;
215 break;
216
217 case OPT_mlong_double_:
218 if (value != 64 && value != 128)
219 {
220 error_at (loc, "unknown switch -mlong-double-%s", arg);
221 opts->x_rs6000_long_double_type_size
222 = RS6000_DEFAULT_LONG_DOUBLE_SIZE;
223 return false;
224 }
225 break;
226
227 case OPT_msingle_float:
228 if (!TARGET_SINGLE_FPU)
229 warning_at (loc, 0,
230 "-msingle-float option equivalent to -mhard-float");
231 /* -msingle-float implies -mno-double-float and TARGET_HARD_FLOAT. */
232 opts->x_rs6000_double_float = 0;
233 opts->x_rs6000_isa_flags &= ~OPTION_MASK_SOFT_FLOAT;
234 opts_set->x_rs6000_isa_flags |= OPTION_MASK_SOFT_FLOAT;
235 break;
236
237 case OPT_mdouble_float:
238 /* -mdouble-float implies -msingle-float and TARGET_HARD_FLOAT. */
239 opts->x_rs6000_single_float = 1;
240 opts->x_rs6000_isa_flags &= ~OPTION_MASK_SOFT_FLOAT;
241 opts_set->x_rs6000_isa_flags |= OPTION_MASK_SOFT_FLOAT;
242 break;
243
244 case OPT_msimple_fpu:
245 if (!TARGET_SINGLE_FPU)
246 warning_at (loc, 0, "-msimple-fpu option ignored");
247 break;
248
249 case OPT_mhard_float:
250 /* -mhard_float implies -msingle-float and -mdouble-float. */
251 opts->x_rs6000_single_float = opts->x_rs6000_double_float = 1;
252 break;
253
254 case OPT_msoft_float:
255 /* -msoft_float implies -mnosingle-float and -mnodouble-float. */
256 opts->x_rs6000_single_float = opts->x_rs6000_double_float = 0;
257 break;
258
259 case OPT_mfpu_:
260 fpu_type = (enum fpu_type_t) value;
261 if (fpu_type != FPU_NONE)
262 {
263 /* If -mfpu is not none, then turn off SOFT_FLOAT, turn on
264 HARD_FLOAT. */
265 opts->x_rs6000_isa_flags &= ~OPTION_MASK_SOFT_FLOAT;
266 opts_set->x_rs6000_isa_flags |= OPTION_MASK_SOFT_FLOAT;
267 opts->x_rs6000_xilinx_fpu = 1;
268 if (fpu_type == FPU_SF_LITE || fpu_type == FPU_SF_FULL)
269 opts->x_rs6000_single_float = 1;
270 if (fpu_type == FPU_DF_LITE || fpu_type == FPU_DF_FULL)
271 opts->x_rs6000_single_float = opts->x_rs6000_double_float = 1;
272 if (fpu_type == FPU_SF_LITE || fpu_type == FPU_DF_LITE)
273 opts->x_rs6000_simple_fpu = 1;
274 }
275 else
276 {
277 /* -mfpu=none is equivalent to -msoft-float. */
278 opts->x_rs6000_isa_flags |= OPTION_MASK_SOFT_FLOAT;
279 opts_set->x_rs6000_isa_flags |= OPTION_MASK_SOFT_FLOAT;
280 opts->x_rs6000_single_float = opts->x_rs6000_double_float = 0;
281 }
282 break;
283
284 case OPT_mrecip:
285 opts->x_rs6000_recip_name = (value) ? "default" : "none";
286 break;
287 }
288 return true;
289 }
290
291 #undef TARGET_HANDLE_OPTION
292 #define TARGET_HANDLE_OPTION rs6000_handle_option
293
294 #undef TARGET_OPTION_INIT_STRUCT
295 #define TARGET_OPTION_INIT_STRUCT rs6000_option_init_struct
296
297 #undef TARGET_OPTION_DEFAULT_PARAMS
298 #define TARGET_OPTION_DEFAULT_PARAMS rs6000_option_default_params
299
300 #undef TARGET_OPTION_OPTIMIZATION_TABLE
301 #define TARGET_OPTION_OPTIMIZATION_TABLE rs6000_option_optimization_table
302
303 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
304