1 /* BFD library support routines for architectures.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1997, 1998, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 Hacked by Steve Chamberlain of Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
26 #include "opcode/m68k.h"
28 static const bfd_arch_info_type *
29 bfd_m68k_compatible (const bfd_arch_info_type *a,
30 const bfd_arch_info_type *b);
32 #define N(name, print,d,next) \
33 { 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible, \
34 bfd_default_scan, bfd_arch_default_fill, next, }
36 static const bfd_arch_info_type arch_info_struct[] =
38 N(bfd_mach_m68000, "m68k:68000", FALSE, &arch_info_struct[1]),
39 N(bfd_mach_m68008, "m68k:68008", FALSE, &arch_info_struct[2]),
40 N(bfd_mach_m68010, "m68k:68010", FALSE, &arch_info_struct[3]),
41 N(bfd_mach_m68020, "m68k:68020", FALSE, &arch_info_struct[4]),
42 N(bfd_mach_m68030, "m68k:68030", FALSE, &arch_info_struct[5]),
43 N(bfd_mach_m68040, "m68k:68040", FALSE, &arch_info_struct[6]),
44 N(bfd_mach_m68060, "m68k:68060", FALSE, &arch_info_struct[7]),
45 N(bfd_mach_cpu32, "m68k:cpu32", FALSE, &arch_info_struct[8]),
46 N(bfd_mach_fido, "m68k:fido", FALSE, &arch_info_struct[9]),
48 /* Various combinations of CF architecture features */
49 N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv",
50 FALSE, &arch_info_struct[10]),
51 N(bfd_mach_mcf_isa_a, "m68k:isa-a",
52 FALSE, &arch_info_struct[11]),
53 N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac",
54 FALSE, &arch_info_struct[12]),
55 N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac",
56 FALSE, &arch_info_struct[13]),
57 N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus",
58 FALSE, &arch_info_struct[14]),
59 N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac",
60 FALSE, &arch_info_struct[15]),
61 N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac",
62 FALSE, &arch_info_struct[16]),
63 N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp",
64 FALSE, &arch_info_struct[17]),
65 N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac",
66 FALSE, &arch_info_struct[18]),
67 N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac",
68 FALSE, &arch_info_struct[19]),
69 N(bfd_mach_mcf_isa_b, "m68k:isa-b",
70 FALSE, &arch_info_struct[20]),
71 N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac",
72 FALSE, &arch_info_struct[21]),
73 N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac",
74 FALSE, &arch_info_struct[22]),
75 N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float",
76 FALSE, &arch_info_struct[23]),
77 N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac",
78 FALSE, &arch_info_struct[24]),
79 N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac",
80 FALSE, &arch_info_struct[25]),
81 N(bfd_mach_mcf_isa_c, "m68k:isa-c",
82 FALSE, &arch_info_struct[26]),
83 N(bfd_mach_mcf_isa_c_mac, "m68k:isa-c:mac",
84 FALSE, &arch_info_struct[27]),
85 N(bfd_mach_mcf_isa_c_emac, "m68k:isa-c:emac",
86 FALSE, &arch_info_struct[28]),
87 N(bfd_mach_mcf_isa_c_nodiv, "m68k:isa-c:nodiv",
88 FALSE, &arch_info_struct[29]),
89 N(bfd_mach_mcf_isa_c_nodiv_mac, "m68k:isa-c:nodiv:mac",
90 FALSE, &arch_info_struct[30]),
91 N(bfd_mach_mcf_isa_c_nodiv_emac, "m68k:isa-c:nodiv:emac",
92 FALSE, &arch_info_struct[31]),
94 /* Legacy names for CF architectures */
95 N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", FALSE, &arch_info_struct[32]),
96 N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", FALSE, &arch_info_struct[33]),
97 N(bfd_mach_mcf_isa_a_mac, "m68k:5307", FALSE, &arch_info_struct[34]),
98 N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", FALSE, &arch_info_struct[35]),
99 N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", FALSE, &arch_info_struct[36]),
100 N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", FALSE, &arch_info_struct[37]),
101 N(bfd_mach_mcf_isa_a_emac, "m68k:5249", FALSE, &arch_info_struct[38]),
102 N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x",
103 FALSE, &arch_info_struct[39]),
104 N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x",
105 FALSE, &arch_info_struct[40]),
106 N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", FALSE, 0),
109 const bfd_arch_info_type bfd_m68k_arch =
110 N(0, "m68k", TRUE, &arch_info_struct[0]);
112 /* Table indexed by bfd_mach_arch number indicating which
113 architectural features are supported. */
114 static const unsigned m68k_arch_features[] =
117 m68000|m68881|m68851,
118 m68000|m68881|m68851,
119 m68010|m68881|m68851,
120 m68020|m68881|m68851,
121 m68030|m68881|m68851,
122 m68040|m68881|m68851,
123 m68060|m68881|m68851,
128 mcfisa_a|mcfhwdiv|mcfmac,
129 mcfisa_a|mcfhwdiv|mcfemac,
130 mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp,
131 mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac,
132 mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac,
133 mcfisa_a|mcfhwdiv|mcfisa_b,
134 mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac,
135 mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac,
136 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp,
137 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac,
138 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac,
139 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat,
140 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac,
141 mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac,
142 mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp,
143 mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfmac,
144 mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfemac,
145 mcfisa_a|mcfisa_c|mcfusp,
146 mcfisa_a|mcfisa_c|mcfusp|mcfmac,
147 mcfisa_a|mcfisa_c|mcfusp|mcfemac,
150 /* Return the count of bits set in MASK */
152 bit_count (unsigned mask)
156 for (ix = 0; mask; ix++)
157 /* Clear the LSB set */
158 mask ^= mask & -mask;
162 /* Return the architectural features supported by MACH */
165 bfd_m68k_mach_to_features (int mach)
168 >= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]))
170 return m68k_arch_features[mach];
173 /* Return the bfd machine that most closely represents the
174 architectural features. We find the machine with the smallest
175 number of additional features. If there is no such machine, we
176 find the one with the smallest number of missing features. */
178 int bfd_m68k_features_to_mach (unsigned features)
180 int superset = 0, subset = 0;
181 unsigned extra = 99, missing = 99;
185 ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]);
188 unsigned this_extra, this_missing;
190 if (m68k_arch_features[ix] == features)
192 this_extra = bit_count (m68k_arch_features[ix] & ~features);
193 if (this_extra < extra)
199 this_missing = bit_count (features & ~m68k_arch_features[ix]);
200 if (this_missing < missing)
202 missing = this_missing;
206 return superset ? superset : subset;
209 static const bfd_arch_info_type *
210 bfd_m68k_compatible (const bfd_arch_info_type *a,
211 const bfd_arch_info_type *b)
213 if (a->arch != b->arch)
216 if (a->bits_per_word != b->bits_per_word)
224 if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060)
225 /* Merge m68k machine. */
226 return a->mach > b->mach ? a : b;
227 else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32)
229 /* Merge the machine features. */
230 unsigned features = (bfd_m68k_mach_to_features (a->mach)
231 | bfd_m68k_mach_to_features (b->mach));
233 /* CPU32 and Coldfire are incompatible. */
234 if ((~features & (cpu32 | mcfisa_a)) == 0)
237 /* Fido and Coldfire are incompatible. */
238 if ((~features & (fido_a | mcfisa_a)) == 0)
241 /* ISA A+ and ISA B are incompatible. */
242 if ((~features & (mcfisa_aa | mcfisa_b)) == 0)
245 /* ISA B and ISA C are incompatible. */
246 if ((~features & (mcfisa_b | mcfisa_c)) == 0)
249 /* MAC and EMAC code cannot be merged. */
250 if ((~features & (mcfmac | mcfemac)) == 0)
253 /* CPU32 is compatible with Fido except that Fido does not
254 support tbl instructions. Warn when the user wants to mix
256 if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido)
257 || (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32))
259 static int cpu32_fido_mix_warning;
260 if (!cpu32_fido_mix_warning)
262 cpu32_fido_mix_warning = 1;
263 (*_bfd_error_handler) ("warning: linking CPU32 objects with fido objects");
265 return bfd_lookup_arch (a->arch,
266 bfd_m68k_features_to_mach (fido_a | m68881));
269 return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features));
272 /* They are incompatible. */