1 /* BFD library support routines for architectures.
2 Copyright (C) 1990-2018 Free Software Foundation, Inc.
3 Hacked by Steve Chamberlain of Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "opcode/m68k.h"
27 static const bfd_arch_info_type *
28 bfd_m68k_compatible (const bfd_arch_info_type *a,
29 const bfd_arch_info_type *b);
31 #define N(name, print,d,next) \
32 { 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible, \
33 bfd_default_scan, bfd_arch_default_fill, next, }
35 static const bfd_arch_info_type arch_info_struct[] =
37 N(bfd_mach_m68000, "m68k:68000", FALSE, &arch_info_struct[1]),
38 N(bfd_mach_m68008, "m68k:68008", FALSE, &arch_info_struct[2]),
39 N(bfd_mach_m68010, "m68k:68010", FALSE, &arch_info_struct[3]),
40 N(bfd_mach_m68020, "m68k:68020", FALSE, &arch_info_struct[4]),
41 N(bfd_mach_m68030, "m68k:68030", FALSE, &arch_info_struct[5]),
42 N(bfd_mach_m68040, "m68k:68040", FALSE, &arch_info_struct[6]),
43 N(bfd_mach_m68060, "m68k:68060", FALSE, &arch_info_struct[7]),
44 N(bfd_mach_cpu32, "m68k:cpu32", FALSE, &arch_info_struct[8]),
45 N(bfd_mach_fido, "m68k:fido", FALSE, &arch_info_struct[9]),
47 /* Various combinations of CF architecture features */
48 N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv",
49 FALSE, &arch_info_struct[10]),
50 N(bfd_mach_mcf_isa_a, "m68k:isa-a",
51 FALSE, &arch_info_struct[11]),
52 N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac",
53 FALSE, &arch_info_struct[12]),
54 N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac",
55 FALSE, &arch_info_struct[13]),
56 N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus",
57 FALSE, &arch_info_struct[14]),
58 N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac",
59 FALSE, &arch_info_struct[15]),
60 N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac",
61 FALSE, &arch_info_struct[16]),
62 N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp",
63 FALSE, &arch_info_struct[17]),
64 N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac",
65 FALSE, &arch_info_struct[18]),
66 N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac",
67 FALSE, &arch_info_struct[19]),
68 N(bfd_mach_mcf_isa_b, "m68k:isa-b",
69 FALSE, &arch_info_struct[20]),
70 N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac",
71 FALSE, &arch_info_struct[21]),
72 N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac",
73 FALSE, &arch_info_struct[22]),
74 N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float",
75 FALSE, &arch_info_struct[23]),
76 N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac",
77 FALSE, &arch_info_struct[24]),
78 N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac",
79 FALSE, &arch_info_struct[25]),
80 N(bfd_mach_mcf_isa_c, "m68k:isa-c",
81 FALSE, &arch_info_struct[26]),
82 N(bfd_mach_mcf_isa_c_mac, "m68k:isa-c:mac",
83 FALSE, &arch_info_struct[27]),
84 N(bfd_mach_mcf_isa_c_emac, "m68k:isa-c:emac",
85 FALSE, &arch_info_struct[28]),
86 N(bfd_mach_mcf_isa_c_nodiv, "m68k:isa-c:nodiv",
87 FALSE, &arch_info_struct[29]),
88 N(bfd_mach_mcf_isa_c_nodiv_mac, "m68k:isa-c:nodiv:mac",
89 FALSE, &arch_info_struct[30]),
90 N(bfd_mach_mcf_isa_c_nodiv_emac, "m68k:isa-c:nodiv:emac",
91 FALSE, &arch_info_struct[31]),
93 /* Legacy names for CF architectures */
94 N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", FALSE, &arch_info_struct[32]),
95 N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", FALSE, &arch_info_struct[33]),
96 N(bfd_mach_mcf_isa_a_mac, "m68k:5307", FALSE, &arch_info_struct[34]),
97 N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", FALSE, &arch_info_struct[35]),
98 N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", FALSE, &arch_info_struct[36]),
99 N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", FALSE, &arch_info_struct[37]),
100 N(bfd_mach_mcf_isa_a_emac, "m68k:5249", FALSE, &arch_info_struct[38]),
101 N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x",
102 FALSE, &arch_info_struct[39]),
103 N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x",
104 FALSE, &arch_info_struct[40]),
105 N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", FALSE, 0),
108 const bfd_arch_info_type bfd_m68k_arch =
109 N(0, "m68k", TRUE, &arch_info_struct[0]);
111 /* Table indexed by bfd_mach_arch number indicating which
112 architectural features are supported. */
113 static const unsigned m68k_arch_features[] =
116 m68000|m68881|m68851,
117 m68000|m68881|m68851,
118 m68010|m68881|m68851,
119 m68020|m68881|m68851,
120 m68030|m68881|m68851,
121 m68040|m68881|m68851,
122 m68060|m68881|m68851,
127 mcfisa_a|mcfhwdiv|mcfmac,
128 mcfisa_a|mcfhwdiv|mcfemac,
129 mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp,
130 mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac,
131 mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac,
132 mcfisa_a|mcfhwdiv|mcfisa_b,
133 mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac,
134 mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac,
135 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp,
136 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac,
137 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac,
138 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat,
139 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac,
140 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac,
141 mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp,
142 mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfmac,
143 mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfemac,
144 mcfisa_a|mcfisa_c|mcfusp,
145 mcfisa_a|mcfisa_c|mcfusp|mcfmac,
146 mcfisa_a|mcfisa_c|mcfusp|mcfemac,
149 /* Return the count of bits set in MASK */
151 bit_count (unsigned mask)
155 for (ix = 0; mask; ix++)
156 /* Clear the LSB set */
157 mask ^= mask & -mask;
161 /* Return the architectural features supported by MACH */
164 bfd_m68k_mach_to_features (int mach)
167 >= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]))
169 return m68k_arch_features[mach];
172 /* Return the bfd machine that most closely represents the
173 architectural features. We find the machine with the smallest
174 number of additional features. If there is no such machine, we
175 find the one with the smallest number of missing features. */
177 int bfd_m68k_features_to_mach (unsigned features)
179 int superset = 0, subset = 0;
180 unsigned extra = 99, missing = 99;
184 ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]);
187 unsigned this_extra, this_missing;
189 if (m68k_arch_features[ix] == features)
191 this_extra = bit_count (m68k_arch_features[ix] & ~features);
192 if (this_extra < extra)
198 this_missing = bit_count (features & ~m68k_arch_features[ix]);
199 if (this_missing < missing)
201 missing = this_missing;
205 return superset ? superset : subset;
208 static const bfd_arch_info_type *
209 bfd_m68k_compatible (const bfd_arch_info_type *a,
210 const bfd_arch_info_type *b)
212 if (a->arch != b->arch)
215 if (a->bits_per_word != b->bits_per_word)
223 if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060)
224 /* Merge m68k machine. */
225 return a->mach > b->mach ? a : b;
226 else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32)
228 /* Merge the machine features. */
229 unsigned features = (bfd_m68k_mach_to_features (a->mach)
230 | bfd_m68k_mach_to_features (b->mach));
232 /* CPU32 and Coldfire are incompatible. */
233 if ((~features & (cpu32 | mcfisa_a)) == 0)
236 /* Fido and Coldfire are incompatible. */
237 if ((~features & (fido_a | mcfisa_a)) == 0)
240 /* ISA A+ and ISA B are incompatible. */
241 if ((~features & (mcfisa_aa | mcfisa_b)) == 0)
244 /* ISA B and ISA C are incompatible. */
245 if ((~features & (mcfisa_b | mcfisa_c)) == 0)
248 /* MAC and EMAC code cannot be merged. */
249 if ((~features & (mcfmac | mcfemac)) == 0)
252 /* CPU32 is compatible with Fido except that Fido does not
253 support tbl instructions. Warn when the user wants to mix
255 if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido)
256 || (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32))
258 static int cpu32_fido_mix_warning;
259 if (!cpu32_fido_mix_warning)
261 cpu32_fido_mix_warning = 1;
262 _bfd_error_handler ("warning: linking CPU32 objects with fido objects");
264 return bfd_lookup_arch (a->arch,
265 bfd_m68k_features_to_mach (fido_a | m68881));
268 return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features));
271 /* They are incompatible. */