root / target-arm / nwfpe / fpa11_cpdt.c @ e784ba70
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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 | 00406dff | bellard | void loadSingle(const unsigned int Fn,const unsigned int *pMem) |
33 | 00406dff | bellard | { |
34 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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35 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
36 | 00406dff | bellard | fpa11->fType[Fn] = typeSingle; |
37 | 53a5960a | pbrook | fpa11->fpreg[Fn].fSingle = tget32(addr); |
38 | 00406dff | bellard | } |
39 | 00406dff | bellard | |
40 | 00406dff | bellard | static inline |
41 | 00406dff | bellard | void loadDouble(const unsigned int Fn,const unsigned int *pMem) |
42 | 00406dff | bellard | { |
43 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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44 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
45 | 00406dff | bellard | unsigned int *p; |
46 | 00406dff | bellard | p = (unsigned int*)&fpa11->fpreg[Fn].fDouble; |
47 | 00406dff | bellard | fpa11->fType[Fn] = typeDouble; |
48 | a8d3431a | bellard | #ifdef WORDS_BIGENDIAN
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49 | 53a5960a | pbrook | p[0] = tget32(addr); /* sign & exponent */ |
50 | 53a5960a | pbrook | p[1] = tget32(addr + 4); |
51 | a8d3431a | bellard | #else
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52 | 53a5960a | pbrook | p[0] = tget32(addr + 4); |
53 | 53a5960a | pbrook | p[1] = tget32(addr); /* sign & exponent */ |
54 | a8d3431a | bellard | #endif
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55 | 00406dff | bellard | } |
56 | 00406dff | bellard | |
57 | 00406dff | bellard | static inline |
58 | 00406dff | bellard | void loadExtended(const unsigned int Fn,const unsigned int *pMem) |
59 | 00406dff | bellard | { |
60 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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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 | 53a5960a | pbrook | p[0] = tget32(addr); /* sign & exponent */ |
66 | 53a5960a | pbrook | p[1] = tget32(addr + 8); /* ls bits */ |
67 | 53a5960a | pbrook | p[2] = tget32(addr + 4); /* ms bits */ |
68 | 00406dff | bellard | } |
69 | 00406dff | bellard | |
70 | 00406dff | bellard | static inline |
71 | 00406dff | bellard | void loadMultiple(const unsigned int Fn,const unsigned int *pMem) |
72 | 00406dff | bellard | { |
73 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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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 | 53a5960a | pbrook | x = tget32(addr); |
80 | 00406dff | bellard | fpa11->fType[Fn] = (x >> 14) & 0x00000003; |
81 | 00406dff | bellard | |
82 | 00406dff | bellard | switch (fpa11->fType[Fn])
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83 | 00406dff | bellard | { |
84 | 00406dff | bellard | case typeSingle:
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85 | 00406dff | bellard | case typeDouble:
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86 | 00406dff | bellard | { |
87 | 53a5960a | pbrook | p[0] = tget32(addr + 8); /* Single */ |
88 | 53a5960a | pbrook | p[1] = tget32(addr + 4); /* double msw */ |
89 | 00406dff | bellard | p[2] = 0; /* empty */ |
90 | 00406dff | bellard | } |
91 | 00406dff | bellard | break;
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92 | 00406dff | bellard | |
93 | 00406dff | bellard | case typeExtended:
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94 | 00406dff | bellard | { |
95 | 53a5960a | pbrook | p[1] = tget32(addr + 8); |
96 | 53a5960a | pbrook | p[2] = tget32(addr + 4); /* msw */ |
97 | 00406dff | bellard | p[0] = (x & 0x80003fff); |
98 | 00406dff | bellard | } |
99 | 00406dff | bellard | break;
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100 | 00406dff | bellard | } |
101 | 00406dff | bellard | } |
102 | 00406dff | bellard | |
103 | 00406dff | bellard | static inline |
104 | 00406dff | bellard | void storeSingle(const unsigned int Fn,unsigned int *pMem) |
105 | 00406dff | bellard | { |
106 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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107 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
108 | 00406dff | bellard | float32 val; |
109 | 00406dff | bellard | register unsigned int *p = (unsigned int*)&val; |
110 | 00406dff | bellard | |
111 | 00406dff | bellard | switch (fpa11->fType[Fn])
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112 | 00406dff | bellard | { |
113 | 00406dff | bellard | case typeDouble:
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114 | 20495218 | bellard | val = float64_to_float32(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status); |
115 | 00406dff | bellard | break;
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116 | 00406dff | bellard | |
117 | 00406dff | bellard | case typeExtended:
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118 | 20495218 | bellard | val = floatx80_to_float32(fpa11->fpreg[Fn].fExtended, &fpa11->fp_status); |
119 | 00406dff | bellard | break;
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120 | 00406dff | bellard | |
121 | 00406dff | bellard | default: val = fpa11->fpreg[Fn].fSingle;
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122 | 00406dff | bellard | } |
123 | 00406dff | bellard | |
124 | 53a5960a | pbrook | tput32(addr, p[0]);
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125 | 00406dff | bellard | } |
126 | 00406dff | bellard | |
127 | 00406dff | bellard | static inline |
128 | 00406dff | bellard | void storeDouble(const unsigned int Fn,unsigned int *pMem) |
129 | 00406dff | bellard | { |
130 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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131 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
132 | 00406dff | bellard | float64 val; |
133 | 00406dff | bellard | register unsigned int *p = (unsigned int*)&val; |
134 | 00406dff | bellard | |
135 | 00406dff | bellard | switch (fpa11->fType[Fn])
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136 | 00406dff | bellard | { |
137 | 00406dff | bellard | case typeSingle:
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138 | 20495218 | bellard | val = float32_to_float64(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status); |
139 | 00406dff | bellard | break;
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140 | 00406dff | bellard | |
141 | 00406dff | bellard | case typeExtended:
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142 | 20495218 | bellard | val = floatx80_to_float64(fpa11->fpreg[Fn].fExtended, &fpa11->fp_status); |
143 | 00406dff | bellard | break;
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144 | 00406dff | bellard | |
145 | 00406dff | bellard | default: val = fpa11->fpreg[Fn].fDouble;
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146 | 00406dff | bellard | } |
147 | a8d3431a | bellard | #ifdef WORDS_BIGENDIAN
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148 | 53a5960a | pbrook | tput32(addr, p[0]); /* msw */ |
149 | 53a5960a | pbrook | tput32(addr + 4, p[1]); /* lsw */ |
150 | a8d3431a | bellard | #else
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151 | 53a5960a | pbrook | tput32(addr, p[1]); /* msw */ |
152 | 53a5960a | pbrook | tput32(addr + 4, p[0]); /* lsw */ |
153 | a8d3431a | bellard | #endif
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154 | 00406dff | bellard | } |
155 | 00406dff | bellard | |
156 | 00406dff | bellard | static inline |
157 | 00406dff | bellard | void storeExtended(const unsigned int Fn,unsigned int *pMem) |
158 | 00406dff | bellard | { |
159 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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160 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
161 | 00406dff | bellard | floatx80 val; |
162 | 00406dff | bellard | register unsigned int *p = (unsigned int*)&val; |
163 | 00406dff | bellard | |
164 | 00406dff | bellard | switch (fpa11->fType[Fn])
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165 | 00406dff | bellard | { |
166 | 00406dff | bellard | case typeSingle:
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167 | 20495218 | bellard | val = float32_to_floatx80(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status); |
168 | 00406dff | bellard | break;
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169 | 00406dff | bellard | |
170 | 00406dff | bellard | case typeDouble:
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171 | 20495218 | bellard | val = float64_to_floatx80(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status); |
172 | 00406dff | bellard | break;
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173 | 00406dff | bellard | |
174 | 00406dff | bellard | default: val = fpa11->fpreg[Fn].fExtended;
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175 | 00406dff | bellard | } |
176 | 00406dff | bellard | |
177 | 53a5960a | pbrook | tput32(addr, p[0]); /* sign & exp */ |
178 | 53a5960a | pbrook | tput32(addr + 8, p[1]); |
179 | 53a5960a | pbrook | tput32(addr + 4, p[2]); /* msw */ |
180 | 00406dff | bellard | } |
181 | 00406dff | bellard | |
182 | 00406dff | bellard | static inline |
183 | 00406dff | bellard | void storeMultiple(const unsigned int Fn,unsigned int *pMem) |
184 | 00406dff | bellard | { |
185 | 53a5960a | pbrook | target_ulong addr = (target_ulong)(long)pMem;
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186 | 00406dff | bellard | FPA11 *fpa11 = GET_FPA11(); |
187 | 00406dff | bellard | register unsigned int nType, *p; |
188 | 00406dff | bellard | |
189 | 00406dff | bellard | p = (unsigned int*)&(fpa11->fpreg[Fn]); |
190 | 00406dff | bellard | nType = fpa11->fType[Fn]; |
191 | 00406dff | bellard | |
192 | 00406dff | bellard | switch (nType)
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193 | 00406dff | bellard | { |
194 | 00406dff | bellard | case typeSingle:
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195 | 00406dff | bellard | case typeDouble:
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196 | 00406dff | bellard | { |
197 | 53a5960a | pbrook | tput32(addr + 8, p[0]); /* single */ |
198 | 53a5960a | pbrook | tput32(addr + 4, p[1]); /* double msw */ |
199 | 53a5960a | pbrook | tput32(addr, nType << 14);
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200 | 00406dff | bellard | } |
201 | 00406dff | bellard | break;
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202 | 00406dff | bellard | |
203 | 00406dff | bellard | case typeExtended:
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204 | 00406dff | bellard | { |
205 | 53a5960a | pbrook | tput32(addr + 4, p[2]); /* msw */ |
206 | 53a5960a | pbrook | tput32(addr + 8, p[1]); |
207 | 53a5960a | pbrook | tput32(addr, (p[0] & 0x80003fff) | (nType << 14)); |
208 | 00406dff | bellard | } |
209 | 00406dff | bellard | break;
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210 | 00406dff | bellard | } |
211 | 00406dff | bellard | } |
212 | 00406dff | bellard | |
213 | 00406dff | bellard | unsigned int PerformLDF(const unsigned int opcode) |
214 | 00406dff | bellard | { |
215 | 00406dff | bellard | unsigned int *pBase, *pAddress, *pFinal, nRc = 1, |
216 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
217 | 00406dff | bellard | |
218 | 00406dff | bellard | //printk("PerformLDF(0x%08x), Fd = 0x%08x\n",opcode,getFd(opcode));
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219 | 00406dff | bellard | |
220 | 00406dff | bellard | pBase = (unsigned int*)readRegister(getRn(opcode)); |
221 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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222 | 00406dff | bellard | { |
223 | 00406dff | bellard | pBase += 2;
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224 | 00406dff | bellard | write_back = 0;
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225 | 00406dff | bellard | } |
226 | 00406dff | bellard | |
227 | 00406dff | bellard | pFinal = pBase; |
228 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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229 | 00406dff | bellard | pFinal += getOffset(opcode); |
230 | 00406dff | bellard | else
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231 | 00406dff | bellard | pFinal -= getOffset(opcode); |
232 | 00406dff | bellard | |
233 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
234 | 00406dff | bellard | |
235 | 00406dff | bellard | switch (opcode & MASK_TRANSFER_LENGTH)
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236 | 00406dff | bellard | { |
237 | 00406dff | bellard | case TRANSFER_SINGLE : loadSingle(getFd(opcode),pAddress); break; |
238 | 00406dff | bellard | case TRANSFER_DOUBLE : loadDouble(getFd(opcode),pAddress); break; |
239 | 00406dff | bellard | case TRANSFER_EXTENDED: loadExtended(getFd(opcode),pAddress); break; |
240 | 00406dff | bellard | default: nRc = 0; |
241 | 00406dff | bellard | } |
242 | 00406dff | bellard | |
243 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
244 | 00406dff | bellard | return nRc;
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245 | 00406dff | bellard | } |
246 | 00406dff | bellard | |
247 | 00406dff | bellard | unsigned int PerformSTF(const unsigned int opcode) |
248 | 00406dff | bellard | { |
249 | 00406dff | bellard | unsigned int *pBase, *pAddress, *pFinal, nRc = 1, |
250 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
251 | 00406dff | bellard | |
252 | 00406dff | bellard | //printk("PerformSTF(0x%08x), Fd = 0x%08x\n",opcode,getFd(opcode));
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253 | 00406dff | bellard | SetRoundingMode(ROUND_TO_NEAREST); |
254 | 00406dff | bellard | |
255 | 00406dff | bellard | pBase = (unsigned int*)readRegister(getRn(opcode)); |
256 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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257 | 00406dff | bellard | { |
258 | 00406dff | bellard | pBase += 2;
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259 | 00406dff | bellard | write_back = 0;
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260 | 00406dff | bellard | } |
261 | 00406dff | bellard | |
262 | 00406dff | bellard | pFinal = pBase; |
263 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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264 | 00406dff | bellard | pFinal += getOffset(opcode); |
265 | 00406dff | bellard | else
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266 | 00406dff | bellard | pFinal -= getOffset(opcode); |
267 | 00406dff | bellard | |
268 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
269 | 00406dff | bellard | |
270 | 00406dff | bellard | switch (opcode & MASK_TRANSFER_LENGTH)
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271 | 00406dff | bellard | { |
272 | 00406dff | bellard | case TRANSFER_SINGLE : storeSingle(getFd(opcode),pAddress); break; |
273 | 00406dff | bellard | case TRANSFER_DOUBLE : storeDouble(getFd(opcode),pAddress); break; |
274 | 00406dff | bellard | case TRANSFER_EXTENDED: storeExtended(getFd(opcode),pAddress); break; |
275 | 00406dff | bellard | default: nRc = 0; |
276 | 00406dff | bellard | } |
277 | 00406dff | bellard | |
278 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
279 | 00406dff | bellard | return nRc;
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280 | 00406dff | bellard | } |
281 | 00406dff | bellard | |
282 | 00406dff | bellard | unsigned int PerformLFM(const unsigned int opcode) |
283 | 00406dff | bellard | { |
284 | 00406dff | bellard | unsigned int i, Fd, *pBase, *pAddress, *pFinal, |
285 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
286 | 00406dff | bellard | |
287 | 00406dff | bellard | pBase = (unsigned int*)readRegister(getRn(opcode)); |
288 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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289 | 00406dff | bellard | { |
290 | 00406dff | bellard | pBase += 2;
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291 | 00406dff | bellard | write_back = 0;
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292 | 00406dff | bellard | } |
293 | 00406dff | bellard | |
294 | 00406dff | bellard | pFinal = pBase; |
295 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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296 | 00406dff | bellard | pFinal += getOffset(opcode); |
297 | 00406dff | bellard | else
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298 | 00406dff | bellard | pFinal -= getOffset(opcode); |
299 | 00406dff | bellard | |
300 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
301 | 00406dff | bellard | |
302 | 00406dff | bellard | Fd = getFd(opcode); |
303 | 00406dff | bellard | for (i=getRegisterCount(opcode);i>0;i--) |
304 | 00406dff | bellard | { |
305 | 00406dff | bellard | loadMultiple(Fd,pAddress); |
306 | 00406dff | bellard | pAddress += 3; Fd++;
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307 | 00406dff | bellard | if (Fd == 8) Fd = 0; |
308 | 00406dff | bellard | } |
309 | 00406dff | bellard | |
310 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
311 | 00406dff | bellard | return 1; |
312 | 00406dff | bellard | } |
313 | 00406dff | bellard | |
314 | 00406dff | bellard | unsigned int PerformSFM(const unsigned int opcode) |
315 | 00406dff | bellard | { |
316 | 00406dff | bellard | unsigned int i, Fd, *pBase, *pAddress, *pFinal, |
317 | 00406dff | bellard | write_back = WRITE_BACK(opcode); |
318 | 00406dff | bellard | |
319 | 00406dff | bellard | pBase = (unsigned int*)readRegister(getRn(opcode)); |
320 | 00406dff | bellard | if (REG_PC == getRn(opcode))
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321 | 00406dff | bellard | { |
322 | 00406dff | bellard | pBase += 2;
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323 | 00406dff | bellard | write_back = 0;
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324 | 00406dff | bellard | } |
325 | 00406dff | bellard | |
326 | 00406dff | bellard | pFinal = pBase; |
327 | 00406dff | bellard | if (BIT_UP_SET(opcode))
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328 | 00406dff | bellard | pFinal += getOffset(opcode); |
329 | 00406dff | bellard | else
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330 | 00406dff | bellard | pFinal -= getOffset(opcode); |
331 | 00406dff | bellard | |
332 | 00406dff | bellard | if (PREINDEXED(opcode)) pAddress = pFinal; else pAddress = pBase; |
333 | 00406dff | bellard | |
334 | 00406dff | bellard | Fd = getFd(opcode); |
335 | 00406dff | bellard | for (i=getRegisterCount(opcode);i>0;i--) |
336 | 00406dff | bellard | { |
337 | 00406dff | bellard | storeMultiple(Fd,pAddress); |
338 | 00406dff | bellard | pAddress += 3; Fd++;
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339 | 00406dff | bellard | if (Fd == 8) Fd = 0; |
340 | 00406dff | bellard | } |
341 | 00406dff | bellard | |
342 | 00406dff | bellard | if (write_back) writeRegister(getRn(opcode),(unsigned int)pFinal); |
343 | 00406dff | bellard | return 1; |
344 | 00406dff | bellard | } |
345 | 00406dff | bellard | |
346 | 00406dff | bellard | #if 1 |
347 | 00406dff | bellard | unsigned int EmulateCPDT(const unsigned int opcode) |
348 | 00406dff | bellard | { |
349 | 00406dff | bellard | unsigned int nRc = 0; |
350 | 00406dff | bellard | |
351 | 00406dff | bellard | //printk("EmulateCPDT(0x%08x)\n",opcode);
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352 | 00406dff | bellard | |
353 | 00406dff | bellard | if (LDF_OP(opcode))
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354 | 00406dff | bellard | { |
355 | 00406dff | bellard | nRc = PerformLDF(opcode); |
356 | 00406dff | bellard | } |
357 | 00406dff | bellard | else if (LFM_OP(opcode)) |
358 | 00406dff | bellard | { |
359 | 00406dff | bellard | nRc = PerformLFM(opcode); |
360 | 00406dff | bellard | } |
361 | 00406dff | bellard | else if (STF_OP(opcode)) |
362 | 00406dff | bellard | { |
363 | 00406dff | bellard | nRc = PerformSTF(opcode); |
364 | 00406dff | bellard | } |
365 | 00406dff | bellard | else if (SFM_OP(opcode)) |
366 | 00406dff | bellard | { |
367 | 00406dff | bellard | nRc = PerformSFM(opcode); |
368 | 00406dff | bellard | } |
369 | 00406dff | bellard | else
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370 | 00406dff | bellard | { |
371 | 00406dff | bellard | nRc = 0;
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372 | 00406dff | bellard | } |
373 | 00406dff | bellard | |
374 | 00406dff | bellard | return nRc;
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375 | 00406dff | bellard | } |
376 | 00406dff | bellard | #endif |