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1 | 00406dff | bellard | /*
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2 | 00406dff | bellard | NetWinder Floating Point Emulator
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3 | 00406dff | bellard | (c) Rebel.com, 1998-1999
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4 | 00406dff | bellard | (c) Philip Blundell, 1998
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5 | 00406dff | bellard | |
6 | 00406dff | bellard | Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
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7 | 00406dff | bellard | |
8 | 00406dff | bellard | This program is free software; you can redistribute it and/or modify
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9 | 00406dff | bellard | it under the terms of the GNU General Public License as published by
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10 | 00406dff | bellard | the Free Software Foundation; either version 2 of the License, or
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11 | 00406dff | bellard | (at your option) any later version.
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12 | 00406dff | bellard | |
13 | 00406dff | bellard | This program is distributed in the hope that it will be useful,
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14 | 00406dff | bellard | but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | 00406dff | bellard | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 | 00406dff | bellard | GNU General Public License for more details.
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17 | 00406dff | bellard | |
18 | 00406dff | bellard | You should have received a copy of the GNU General Public License
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19 | 00406dff | bellard | along with this program; if not, write to the Free Software
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20 | 00406dff | bellard | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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21 | 00406dff | bellard | */
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22 | 00406dff | bellard | |
23 | 00406dff | bellard | #include "fpa11.h" |
24 | 00406dff | bellard | #include "softfloat.h" |
25 | 00406dff | bellard | #include "fpopcode.h" |
26 | 00406dff | bellard | //#include "fpmodule.h"
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27 | 00406dff | bellard | //#include "fpmodule.inl"
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28 | 00406dff | bellard | |
29 | 00406dff | bellard | //#include <asm/uaccess.h>
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30 | 00406dff | bellard | |
31 | 00406dff | bellard | static inline |
32 | 65a650c2 | Paul Brook | void loadSingle(const unsigned int Fn, target_ulong addr) |
33 | 00406dff | bellard | { |
34 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
35 | 00406dff | bellard | fpa11->fType[Fn] = typeSingle; |
36 | 2f619698 | bellard | /* FIXME - handle failure of get_user() */
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37 | 2f619698 | bellard | get_user_u32(fpa11->fpreg[Fn].fSingle, addr); |
38 | 00406dff | bellard | } |
39 | 00406dff | bellard | |
40 | 00406dff | bellard | static inline |
41 | 65a650c2 | Paul Brook | void loadDouble(const unsigned int Fn, target_ulong addr) |
42 | 00406dff | bellard | { |
43 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
44 | 00406dff | bellard | unsigned int *p; |
45 | 00406dff | bellard | p = (unsigned int*)&fpa11->fpreg[Fn].fDouble; |
46 | 00406dff | bellard | fpa11->fType[Fn] = typeDouble; |
47 | e2542fe2 | Juan Quintela | #ifdef HOST_WORDS_BIGENDIAN
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48 | 2f619698 | bellard | /* FIXME - handle failure of get_user() */
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49 | 2f619698 | bellard | get_user_u32(p[0], addr); /* sign & exponent */ |
50 | 2f619698 | bellard | get_user_u32(p[1], addr + 4); |
51 | a8d3431a | bellard | #else
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52 | 2f619698 | bellard | /* FIXME - handle failure of get_user() */
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53 | 2f619698 | bellard | get_user_u32(p[0], addr + 4); |
54 | 2f619698 | bellard | get_user_u32(p[1], addr); /* sign & exponent */ |
55 | a8d3431a | bellard | #endif
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56 | 3b46e624 | ths | } |
57 | 00406dff | bellard | |
58 | 00406dff | bellard | static inline |
59 | 65a650c2 | Paul Brook | void loadExtended(const unsigned int Fn, target_ulong addr) |
60 | 00406dff | bellard | { |
61 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
62 | 00406dff | bellard | unsigned int *p; |
63 | 00406dff | bellard | p = (unsigned int*)&fpa11->fpreg[Fn].fExtended; |
64 | 00406dff | bellard | fpa11->fType[Fn] = typeExtended; |
65 | 2f619698 | bellard | /* FIXME - handle failure of get_user() */
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66 | 2f619698 | bellard | get_user_u32(p[0], addr); /* sign & exponent */ |
67 | 2f619698 | bellard | get_user_u32(p[1], addr + 8); /* ls bits */ |
68 | 2f619698 | bellard | get_user_u32(p[2], addr + 4); /* ms bits */ |
69 | 3b46e624 | ths | } |
70 | 00406dff | bellard | |
71 | 00406dff | bellard | static inline |
72 | 65a650c2 | Paul Brook | void loadMultiple(const unsigned int Fn, target_ulong addr) |
73 | 00406dff | bellard | { |
74 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
75 | 00406dff | bellard | register unsigned int *p; |
76 | 00406dff | bellard | unsigned long x; |
77 | 00406dff | bellard | |
78 | 00406dff | bellard | p = (unsigned int*)&(fpa11->fpreg[Fn]); |
79 | 2f619698 | bellard | /* FIXME - handle failure of get_user() */
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80 | 2f619698 | bellard | get_user_u32(x, addr); |
81 | 00406dff | bellard | fpa11->fType[Fn] = (x >> 14) & 0x00000003; |
82 | 3b46e624 | ths | |
83 | 00406dff | bellard | switch (fpa11->fType[Fn])
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84 | 00406dff | bellard | { |
85 | 00406dff | bellard | case typeSingle:
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86 | 00406dff | bellard | case typeDouble:
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87 | 00406dff | bellard | { |
88 | 2f619698 | bellard | /* FIXME - handle failure of get_user() */
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89 | 2f619698 | bellard | get_user_u32(p[0], addr + 8); /* Single */ |
90 | 2f619698 | bellard | get_user_u32(p[1], addr + 4); /* double msw */ |
91 | 00406dff | bellard | p[2] = 0; /* empty */ |
92 | 00406dff | bellard | } |
93 | 5fafdf24 | ths | break;
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94 | 3b46e624 | ths | |
95 | 00406dff | bellard | case typeExtended:
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96 | 00406dff | bellard | { |
97 | 2f619698 | bellard | /* FIXME - handle failure of get_user() */
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98 | 2f619698 | bellard | get_user_u32(p[1], addr + 8); |
99 | 2f619698 | bellard | get_user_u32(p[2], addr + 4); /* msw */ |
100 | 3b46e624 | ths | p[0] = (x & 0x80003fff); |
101 | 00406dff | bellard | } |
102 | 00406dff | bellard | break;
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103 | 00406dff | bellard | } |
104 | 00406dff | bellard | } |
105 | 00406dff | bellard | |
106 | 00406dff | bellard | static inline |
107 | 65a650c2 | Paul Brook | void storeSingle(const unsigned int Fn, target_ulong addr) |
108 | 00406dff | bellard | { |
109 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
110 | 00406dff | bellard | float32 val; |
111 | 00406dff | bellard | register unsigned int *p = (unsigned int*)&val; |
112 | 3b46e624 | ths | |
113 | 00406dff | bellard | switch (fpa11->fType[Fn])
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114 | 00406dff | bellard | { |
115 | 5fafdf24 | ths | case typeDouble:
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116 | 20495218 | bellard | val = float64_to_float32(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status); |
117 | 00406dff | bellard | break;
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118 | 00406dff | bellard | |
119 | 5fafdf24 | ths | case typeExtended:
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120 | 20495218 | bellard | val = floatx80_to_float32(fpa11->fpreg[Fn].fExtended, &fpa11->fp_status); |
121 | 00406dff | bellard | break;
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122 | 00406dff | bellard | |
123 | 00406dff | bellard | default: val = fpa11->fpreg[Fn].fSingle;
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124 | 00406dff | bellard | } |
125 | 3b46e624 | ths | |
126 | 2f619698 | bellard | /* FIXME - handle put_user() failures */
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127 | 2f619698 | bellard | put_user_u32(p[0], addr);
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128 | 3b46e624 | ths | } |
129 | 00406dff | bellard | |
130 | 00406dff | bellard | static inline |
131 | 65a650c2 | Paul Brook | void storeDouble(const unsigned int Fn, target_ulong addr) |
132 | 00406dff | bellard | { |
133 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
134 | 00406dff | bellard | float64 val; |
135 | 00406dff | bellard | register unsigned int *p = (unsigned int*)&val; |
136 | 00406dff | bellard | |
137 | 00406dff | bellard | switch (fpa11->fType[Fn])
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138 | 00406dff | bellard | { |
139 | 5fafdf24 | ths | case typeSingle:
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140 | 20495218 | bellard | val = float32_to_float64(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status); |
141 | 00406dff | bellard | break;
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142 | 00406dff | bellard | |
143 | 00406dff | bellard | case typeExtended:
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144 | 20495218 | bellard | val = floatx80_to_float64(fpa11->fpreg[Fn].fExtended, &fpa11->fp_status); |
145 | 00406dff | bellard | break;
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146 | 00406dff | bellard | |
147 | 00406dff | bellard | default: val = fpa11->fpreg[Fn].fDouble;
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148 | 00406dff | bellard | } |
149 | 2f619698 | bellard | /* FIXME - handle put_user() failures */
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150 | e2542fe2 | Juan Quintela | #ifdef HOST_WORDS_BIGENDIAN
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151 | 2f619698 | bellard | put_user_u32(p[0], addr); /* msw */ |
152 | 2f619698 | bellard | put_user_u32(p[1], addr + 4); /* lsw */ |
153 | a8d3431a | bellard | #else
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154 | 2f619698 | bellard | put_user_u32(p[1], addr); /* msw */ |
155 | 2f619698 | bellard | put_user_u32(p[0], addr + 4); /* lsw */ |
156 | a8d3431a | bellard | #endif
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157 | 3b46e624 | ths | } |
158 | 00406dff | bellard | |
159 | 00406dff | bellard | static inline |
160 | 65a650c2 | Paul Brook | void storeExtended(const unsigned int Fn, target_ulong addr) |
161 | 00406dff | bellard | { |
162 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
163 | 00406dff | bellard | floatx80 val; |
164 | 00406dff | bellard | register unsigned int *p = (unsigned int*)&val; |
165 | 3b46e624 | ths | |
166 | 00406dff | bellard | switch (fpa11->fType[Fn])
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167 | 00406dff | bellard | { |
168 | 5fafdf24 | ths | case typeSingle:
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169 | 20495218 | bellard | val = float32_to_floatx80(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status); |
170 | 00406dff | bellard | break;
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171 | 00406dff | bellard | |
172 | 5fafdf24 | ths | case typeDouble:
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173 | 20495218 | bellard | val = float64_to_floatx80(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status); |
174 | 00406dff | bellard | break;
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175 | 00406dff | bellard | |
176 | 00406dff | bellard | default: val = fpa11->fpreg[Fn].fExtended;
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177 | 00406dff | bellard | } |
178 | 3b46e624 | ths | |
179 | 2f619698 | bellard | /* FIXME - handle put_user() failures */
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180 | 2f619698 | bellard | put_user_u32(p[0], addr); /* sign & exp */ |
181 | 2f619698 | bellard | put_user_u32(p[1], addr + 8); |
182 | 2f619698 | bellard | put_user_u32(p[2], addr + 4); /* msw */ |
183 | 3b46e624 | ths | } |
184 | 00406dff | bellard | |
185 | 00406dff | bellard | static inline |
186 | 65a650c2 | Paul Brook | void storeMultiple(const unsigned int Fn, target_ulong addr) |
187 | 00406dff | bellard | { |
188 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
189 | 00406dff | bellard | register unsigned int nType, *p; |
190 | 3b46e624 | ths | |
191 | 00406dff | bellard | p = (unsigned int*)&(fpa11->fpreg[Fn]); |
192 | 00406dff | bellard | nType = fpa11->fType[Fn]; |
193 | 3b46e624 | ths | |
194 | 00406dff | bellard | switch (nType)
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195 | 00406dff | bellard | { |
196 | 00406dff | bellard | case typeSingle:
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197 | 00406dff | bellard | case typeDouble:
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198 | 00406dff | bellard | { |
199 | 2f619698 | bellard | put_user_u32(p[0], addr + 8); /* single */ |
200 | 2f619698 | bellard | put_user_u32(p[1], addr + 4); /* double msw */ |
201 | 2f619698 | bellard | put_user_u32(nType << 14, addr);
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202 | 00406dff | bellard | } |
203 | 5fafdf24 | ths | break;
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204 | 3b46e624 | ths | |
205 | 00406dff | bellard | case typeExtended:
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206 | 00406dff | bellard | { |
207 | 2f619698 | bellard | put_user_u32(p[2], addr + 4); /* msw */ |
208 | 2f619698 | bellard | put_user_u32(p[1], addr + 8); |
209 | 2f619698 | bellard | put_user_u32((p[0] & 0x80003fff) | (nType << 14), addr); |
210 | 00406dff | bellard | } |
211 | 00406dff | bellard | break;
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212 | 00406dff | bellard | } |
213 | 00406dff | bellard | } |
214 | 00406dff | bellard | |
215 | 65a650c2 | Paul Brook | static unsigned int PerformLDF(const unsigned int opcode) |
216 | 00406dff | bellard | { |
217 | 65a650c2 | Paul Brook | target_ulong pBase, pAddress, pFinal; |
218 | 65a650c2 | Paul Brook | unsigned int nRc = 1, |
219 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
220 | 00406dff | bellard | |
221 | 00406dff | bellard | //printk("PerformLDF(0x%08x), Fd = 0x%08x\n",opcode,getFd(opcode));
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222 | 00406dff | bellard | |
223 | 65a650c2 | Paul Brook | pBase = readRegister(getRn(opcode)); |
224 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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225 | 00406dff | bellard | { |
226 | 65a650c2 | Paul Brook | pBase += 8;
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227 | 00406dff | bellard | write_back = 0;
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228 | 00406dff | bellard | } |
229 | 00406dff | bellard | |
230 | 00406dff | bellard | pFinal = pBase; |
231 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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232 | 65a650c2 | Paul Brook | pFinal += getOffset(opcode) * 4;
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233 | 00406dff | bellard | else
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234 | 65a650c2 | Paul Brook | pFinal -= getOffset(opcode) * 4;
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235 | 00406dff | bellard | |
236 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
237 | 00406dff | bellard | |
238 | 00406dff | bellard | switch (opcode & MASK_TRANSFER_LENGTH)
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239 | 00406dff | bellard | { |
240 | 00406dff | bellard | case TRANSFER_SINGLE : loadSingle(getFd(opcode),pAddress); break; |
241 | 00406dff | bellard | case TRANSFER_DOUBLE : loadDouble(getFd(opcode),pAddress); break; |
242 | 00406dff | bellard | case TRANSFER_EXTENDED: loadExtended(getFd(opcode),pAddress); break; |
243 | 00406dff | bellard | default: nRc = 0; |
244 | 00406dff | bellard | } |
245 | 3b46e624 | ths | |
246 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
247 | 00406dff | bellard | return nRc;
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248 | 00406dff | bellard | } |
249 | 00406dff | bellard | |
250 | 65a650c2 | Paul Brook | static unsigned int PerformSTF(const unsigned int opcode) |
251 | 00406dff | bellard | { |
252 | 65a650c2 | Paul Brook | target_ulong pBase, pAddress, pFinal; |
253 | 65a650c2 | Paul Brook | unsigned int nRc = 1, |
254 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
255 | 3b46e624 | ths | |
256 | 00406dff | bellard | //printk("PerformSTF(0x%08x), Fd = 0x%08x\n",opcode,getFd(opcode));
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257 | 00406dff | bellard | SetRoundingMode(ROUND_TO_NEAREST); |
258 | 3b46e624 | ths | |
259 | 65a650c2 | Paul Brook | pBase = readRegister(getRn(opcode)); |
260 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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261 | 00406dff | bellard | { |
262 | 65a650c2 | Paul Brook | pBase += 8;
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263 | 00406dff | bellard | write_back = 0;
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264 | 00406dff | bellard | } |
265 | 00406dff | bellard | |
266 | 00406dff | bellard | pFinal = pBase; |
267 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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268 | 65a650c2 | Paul Brook | pFinal += getOffset(opcode) * 4;
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269 | 00406dff | bellard | else
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270 | 65a650c2 | Paul Brook | pFinal -= getOffset(opcode) * 4;
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271 | 00406dff | bellard | |
272 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
273 | 00406dff | bellard | |
274 | 00406dff | bellard | switch (opcode & MASK_TRANSFER_LENGTH)
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275 | 00406dff | bellard | { |
276 | 00406dff | bellard | case TRANSFER_SINGLE : storeSingle(getFd(opcode),pAddress); break; |
277 | 00406dff | bellard | case TRANSFER_DOUBLE : storeDouble(getFd(opcode),pAddress); break; |
278 | 00406dff | bellard | case TRANSFER_EXTENDED: storeExtended(getFd(opcode),pAddress); break; |
279 | 00406dff | bellard | default: nRc = 0; |
280 | 00406dff | bellard | } |
281 | 3b46e624 | ths | |
282 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
283 | 00406dff | bellard | return nRc;
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284 | 00406dff | bellard | } |
285 | 00406dff | bellard | |
286 | 65a650c2 | Paul Brook | static unsigned int PerformLFM(const unsigned int opcode) |
287 | 00406dff | bellard | { |
288 | 65a650c2 | Paul Brook | unsigned int i, Fd, |
289 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
290 | 65a650c2 | Paul Brook | target_ulong pBase, pAddress, pFinal; |
291 | 00406dff | bellard | |
292 | 65a650c2 | Paul Brook | pBase = readRegister(getRn(opcode)); |
293 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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294 | 00406dff | bellard | { |
295 | 65a650c2 | Paul Brook | pBase += 8;
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296 | 00406dff | bellard | write_back = 0;
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297 | 00406dff | bellard | } |
298 | 00406dff | bellard | |
299 | 00406dff | bellard | pFinal = pBase; |
300 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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301 | 65a650c2 | Paul Brook | pFinal += getOffset(opcode) * 4;
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302 | 00406dff | bellard | else
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303 | 65a650c2 | Paul Brook | pFinal -= getOffset(opcode) * 4;
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304 | 00406dff | bellard | |
305 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
306 | 00406dff | bellard | |
307 | 00406dff | bellard | Fd = getFd(opcode); |
308 | 00406dff | bellard | for (i=getRegisterCount(opcode);i>0;i--) |
309 | 00406dff | bellard | { |
310 | 00406dff | bellard | loadMultiple(Fd,pAddress); |
311 | 65a650c2 | Paul Brook | pAddress += 12; Fd++;
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312 | 00406dff | bellard | if (Fd == 8) Fd = 0; |
313 | 00406dff | bellard | } |
314 | 00406dff | bellard | |
315 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
316 | 00406dff | bellard | return 1; |
317 | 00406dff | bellard | } |
318 | 00406dff | bellard | |
319 | 65a650c2 | Paul Brook | static unsigned int PerformSFM(const unsigned int opcode) |
320 | 00406dff | bellard | { |
321 | 65a650c2 | Paul Brook | unsigned int i, Fd, |
322 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
323 | 65a650c2 | Paul Brook | target_ulong pBase, pAddress, pFinal; |
324 | 3b46e624 | ths | |
325 | 65a650c2 | Paul Brook | pBase = readRegister(getRn(opcode)); |
326 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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327 | 00406dff | bellard | { |
328 | 65a650c2 | Paul Brook | pBase += 8;
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329 | 00406dff | bellard | write_back = 0;
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330 | 00406dff | bellard | } |
331 | 3b46e624 | ths | |
332 | 00406dff | bellard | pFinal = pBase; |
333 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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334 | 65a650c2 | Paul Brook | pFinal += getOffset(opcode) * 4;
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335 | 00406dff | bellard | else
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336 | 65a650c2 | Paul Brook | pFinal -= getOffset(opcode) * 4;
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337 | 00406dff | bellard | |
338 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
339 | 00406dff | bellard | |
340 | 00406dff | bellard | Fd = getFd(opcode); |
341 | 00406dff | bellard | for (i=getRegisterCount(opcode);i>0;i--) |
342 | 00406dff | bellard | { |
343 | 00406dff | bellard | storeMultiple(Fd,pAddress); |
344 | 65a650c2 | Paul Brook | pAddress += 12; Fd++;
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345 | 00406dff | bellard | if (Fd == 8) Fd = 0; |
346 | 00406dff | bellard | } |
347 | 00406dff | bellard | |
348 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
349 | 00406dff | bellard | return 1; |
350 | 00406dff | bellard | } |
351 | 00406dff | bellard | |
352 | 00406dff | bellard | #if 1 |
353 | 00406dff | bellard | unsigned int EmulateCPDT(const unsigned int opcode) |
354 | 00406dff | bellard | { |
355 | 00406dff | bellard | unsigned int nRc = 0; |
356 | 00406dff | bellard | |
357 | 00406dff | bellard | //printk("EmulateCPDT(0x%08x)\n",opcode);
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358 | 3b46e624 | ths | |
359 | 00406dff | bellard | if (LDF_OP(opcode))
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360 | 00406dff | bellard | { |
361 | 00406dff | bellard | nRc = PerformLDF(opcode); |
362 | 00406dff | bellard | } |
363 | 00406dff | bellard | else if (LFM_OP(opcode)) |
364 | 00406dff | bellard | { |
365 | 00406dff | bellard | nRc = PerformLFM(opcode); |
366 | 00406dff | bellard | } |
367 | 00406dff | bellard | else if (STF_OP(opcode)) |
368 | 00406dff | bellard | { |
369 | 00406dff | bellard | nRc = PerformSTF(opcode); |
370 | 5fafdf24 | ths | } |
371 | 00406dff | bellard | else if (SFM_OP(opcode)) |
372 | 00406dff | bellard | { |
373 | 00406dff | bellard | nRc = PerformSFM(opcode); |
374 | 00406dff | bellard | } |
375 | 00406dff | bellard | else
|
376 | 00406dff | bellard | { |
377 | 00406dff | bellard | nRc = 0;
|
378 | 00406dff | bellard | } |
379 | 3b46e624 | ths | |
380 | 00406dff | bellard | return nRc;
|
381 | 00406dff | bellard | } |
382 | 00406dff | bellard | #endif |