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252b5132 | 1 | /* BFD library support routines for architectures. |
3e602632 | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1997, 1998, 2000, 2001, 2002, |
266abb8f | 3 | 2003, 2004, 2006 Free Software Foundation, Inc. |
252b5132 RH |
4 | Hacked by Steve Chamberlain of Cygnus Support. |
5 | ||
3e602632 | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
3e602632 NC |
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 2 of the License, or | |
11 | (at your option) any later version. | |
252b5132 | 12 | |
3e602632 NC |
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. | |
252b5132 | 17 | |
3e602632 NC |
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 | |
3e110533 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
252b5132 RH |
21 | |
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
266abb8f | 25 | #include "opcode/m68k.h" |
252b5132 RH |
26 | |
27 | #define N(name, print,d,next) \ | |
28 | { 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_default_compatible,bfd_default_scan, next, } | |
29 | ||
30 | static const bfd_arch_info_type arch_info_struct[] = | |
3cac17ae | 31 | { |
3e602632 NC |
32 | N(bfd_mach_m68000, "m68k:68000", FALSE, &arch_info_struct[1]), |
33 | N(bfd_mach_m68008, "m68k:68008", FALSE, &arch_info_struct[2]), | |
34 | N(bfd_mach_m68010, "m68k:68010", FALSE, &arch_info_struct[3]), | |
35 | N(bfd_mach_m68020, "m68k:68020", FALSE, &arch_info_struct[4]), | |
36 | N(bfd_mach_m68030, "m68k:68030", FALSE, &arch_info_struct[5]), | |
37 | N(bfd_mach_m68040, "m68k:68040", FALSE, &arch_info_struct[6]), | |
266abb8f NS |
38 | N(bfd_mach_m68060, "m68k:68060", FALSE, &arch_info_struct[7]), |
39 | N(bfd_mach_cpu32, "m68k:cpu32", FALSE, &arch_info_struct[8]), | |
40 | ||
41 | /* Various combinations of CF architecture features */ | |
42 | N(bfd_mach_mcf_isa_a, "m68k:isa-a", | |
43 | FALSE, &arch_info_struct[9]), | |
44 | N(bfd_mach_mcf_isa_a_div, "m68k:isa-a:div", | |
45 | FALSE, &arch_info_struct[10]), | |
46 | N(bfd_mach_mcf_isa_a_div_mac, "m68k:isa-a:div:mac", | |
47 | FALSE, &arch_info_struct[11]), | |
48 | N(bfd_mach_mcf_isa_a_div_emac, "m68k:isa-a:div:emac", | |
49 | FALSE, &arch_info_struct[12]), | |
50 | N(bfd_mach_mcf_isa_aplus, "m68k:isa-a+", | |
51 | FALSE, &arch_info_struct[13]), | |
52 | N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-a+:mac", | |
53 | FALSE, &arch_info_struct[14]), | |
54 | N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-a+:emac", | |
55 | FALSE, &arch_info_struct[15]), | |
56 | N(bfd_mach_mcf_isa_aplus_usp, "m68k:isa-a+:usp", | |
57 | FALSE, &arch_info_struct[16]), | |
58 | N(bfd_mach_mcf_isa_aplus_usp_mac, "m68k:isa-a+:usp:mac", | |
59 | FALSE, &arch_info_struct[17]), | |
60 | N(bfd_mach_mcf_isa_aplus_usp_emac, "m68k:isa-a+:usp:emac", | |
61 | FALSE, &arch_info_struct[18]), | |
62 | N(bfd_mach_mcf_isa_b, "m68k:isa-b", | |
63 | FALSE, &arch_info_struct[19]), | |
64 | N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac", | |
65 | FALSE, &arch_info_struct[20]), | |
66 | N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac", | |
67 | FALSE, &arch_info_struct[21]), | |
68 | N(bfd_mach_mcf_isa_b_usp_float, "m68k:isa-b:usp:float", | |
69 | FALSE, &arch_info_struct[22]), | |
70 | N(bfd_mach_mcf_isa_b_usp_float_mac, "m68k:isa-b:usp:float:mac", | |
71 | FALSE, &arch_info_struct[23]), | |
72 | N(bfd_mach_mcf_isa_b_usp_float_emac, "m68k:isa-b:usp:float:emac", | |
73 | FALSE, &arch_info_struct[24]), | |
74 | ||
75 | /* Legacy names for CF architectures */ | |
76 | N(bfd_mach_mcf_isa_a, "m68k:5200", FALSE, &arch_info_struct[25]), | |
77 | N(bfd_mach_mcf_isa_a_div_mac,"m68k:5206e", FALSE, &arch_info_struct[26]), | |
78 | N(bfd_mach_mcf_isa_a_div_mac, "m68k:5307", FALSE, &arch_info_struct[27]), | |
79 | N(bfd_mach_mcf_isa_b_mac, "m68k:5407", FALSE, &arch_info_struct[28]), | |
80 | N(bfd_mach_mcf_isa_aplus_usp_emac, "m68k:528x", | |
81 | FALSE, &arch_info_struct[29]), | |
82 | N(bfd_mach_mcf_isa_aplus_usp_emac, "m68k:521x", | |
83 | FALSE, &arch_info_struct[30]), | |
84 | N(bfd_mach_mcf_isa_a_div_emac, "m68k:5249", FALSE, &arch_info_struct[31]), | |
85 | N(bfd_mach_mcf_isa_b_usp_float_emac, "m68k:547x", | |
86 | FALSE, &arch_info_struct[32]), | |
87 | N(bfd_mach_mcf_isa_b_usp_float_emac, "m68k:548x", | |
88 | FALSE, &arch_info_struct[33]), | |
89 | N(bfd_mach_mcf_isa_b_usp_float_emac, "m68k:cfv4e", FALSE, 0), | |
3cac17ae | 90 | }; |
252b5132 RH |
91 | |
92 | const bfd_arch_info_type bfd_m68k_arch = | |
b34976b6 | 93 | N(0, "m68k", TRUE, &arch_info_struct[0]); |
266abb8f NS |
94 | |
95 | /* Table indexed by bfd_mach_arch number indicating which | |
96 | architectural features are supported. */ | |
97 | static const unsigned m68k_arch_features[] = | |
98 | { | |
99 | 0, | |
100 | m68000|m68881|m68851, | |
101 | m68000|m68881|m68851, | |
102 | m68010|m68881|m68851, | |
103 | m68020|m68881|m68851, | |
104 | m68030|m68881|m68851, | |
105 | m68040|m68881|m68851, | |
106 | m68060|m68881|m68851, | |
107 | cpu32|m68881, | |
108 | mcfisa_a, | |
109 | mcfisa_a|mcfhwdiv, | |
110 | mcfisa_a|mcfhwdiv|mcfmac, | |
111 | mcfisa_a|mcfhwdiv|mcfemac, | |
112 | mcfisa_a|mcfisa_aa|mcfhwdiv, | |
113 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfmac, | |
114 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfemac, | |
115 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp, | |
116 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac, | |
117 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac, | |
118 | mcfisa_a|mcfhwdiv|mcfisa_b, | |
119 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac, | |
120 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac, | |
121 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat, | |
122 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac, | |
123 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac, | |
124 | }; | |
125 | ||
126 | /* Return the count of bits set in MASK */ | |
127 | static unsigned | |
128 | bit_count (unsigned mask) | |
129 | { | |
130 | unsigned ix; | |
131 | ||
132 | for (ix = 0; mask; ix++) | |
133 | /* Clear the LSB set */ | |
134 | mask ^= mask & -mask; | |
135 | return ix; | |
136 | } | |
137 | ||
138 | /* Return the architectural features supported by MACH */ | |
139 | ||
140 | unsigned | |
141 | bfd_m68k_mach_to_features (int mach) | |
142 | { | |
143 | if ((unsigned)mach | |
144 | >= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0])) | |
145 | mach = 0; | |
146 | return m68k_arch_features[mach]; | |
147 | } | |
148 | ||
149 | /* Return the bfd machine that most closely represents the | |
150 | architectural features. We find the machine with the smallest | |
151 | number of additional features. If there is no such machine, we | |
152 | find the one with the smallest number of missing features. */ | |
153 | ||
154 | int bfd_m68k_features_to_mach (unsigned features) | |
155 | { | |
156 | int superset = 0, subset = 0; | |
157 | unsigned extra = 99, missing = 99; | |
158 | unsigned ix; | |
159 | ||
160 | for (ix = 0; | |
161 | ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]); | |
162 | ix++) | |
163 | { | |
164 | unsigned this_extra, this_missing; | |
165 | ||
166 | if (m68k_arch_features[ix] == features) | |
167 | return ix; | |
168 | this_extra = bit_count (m68k_arch_features[ix] & ~features); | |
169 | if (this_extra < extra) | |
170 | { | |
171 | extra = this_extra; | |
172 | superset = ix; | |
173 | } | |
174 | ||
175 | this_missing = bit_count (features & ~m68k_arch_features[ix]); | |
176 | if (this_missing < missing) | |
177 | { | |
178 | missing = this_missing; | |
179 | superset = ix; | |
180 | } | |
181 | } | |
182 | return superset ? superset : subset; | |
183 | } |