src/arm/isa-arm.c (view raw)
1/* Copyright (c) 2013-2014 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include <mgba/internal/arm/isa-arm.h>
7
8#include <mgba/internal/arm/arm.h>
9#include <mgba/internal/arm/emitter-arm.h>
10#include <mgba/internal/arm/isa-inlines.h>
11#include <mgba-util/math.h>
12
13#define PSR_USER_MASK 0xF0000000
14#define PSR_PRIV_MASK 0x000000CF
15#define PSR_STATE_MASK 0x00000020
16
17// Addressing mode 1
18static inline void _shiftLSL(struct ARMCore* cpu, uint32_t opcode) {
19 int rm = opcode & 0x0000000F;
20 if (opcode & 0x00000010) {
21 int rs = (opcode >> 8) & 0x0000000F;
22 ++cpu->cycles;
23 int shift = cpu->gprs[rs];
24 if (rs == ARM_PC) {
25 shift += 4;
26 }
27 shift &= 0xFF;
28 int32_t shiftVal = cpu->gprs[rm];
29 if (rm == ARM_PC) {
30 shiftVal += 4;
31 }
32 if (!shift) {
33 cpu->shifterOperand = shiftVal;
34 cpu->shifterCarryOut = cpu->cpsr.c;
35 } else if (shift < 32) {
36 cpu->shifterOperand = shiftVal << shift;
37 cpu->shifterCarryOut = (shiftVal >> (32 - shift)) & 1;
38 } else if (shift == 32) {
39 cpu->shifterOperand = 0;
40 cpu->shifterCarryOut = shiftVal & 1;
41 } else {
42 cpu->shifterOperand = 0;
43 cpu->shifterCarryOut = 0;
44 }
45 } else {
46 int immediate = (opcode & 0x00000F80) >> 7;
47 if (!immediate) {
48 cpu->shifterOperand = cpu->gprs[rm];
49 cpu->shifterCarryOut = cpu->cpsr.c;
50 } else {
51 cpu->shifterOperand = cpu->gprs[rm] << immediate;
52 cpu->shifterCarryOut = (cpu->gprs[rm] >> (32 - immediate)) & 1;
53 }
54 }
55}
56
57static inline void _shiftLSR(struct ARMCore* cpu, uint32_t opcode) {
58 int rm = opcode & 0x0000000F;
59 if (opcode & 0x00000010) {
60 int rs = (opcode >> 8) & 0x0000000F;
61 ++cpu->cycles;
62 int shift = cpu->gprs[rs];
63 if (rs == ARM_PC) {
64 shift += 4;
65 }
66 shift &= 0xFF;
67 uint32_t shiftVal = cpu->gprs[rm];
68 if (rm == ARM_PC) {
69 shiftVal += 4;
70 }
71 if (!shift) {
72 cpu->shifterOperand = shiftVal;
73 cpu->shifterCarryOut = cpu->cpsr.c;
74 } else if (shift < 32) {
75 cpu->shifterOperand = shiftVal >> shift;
76 cpu->shifterCarryOut = (shiftVal >> (shift - 1)) & 1;
77 } else if (shift == 32) {
78 cpu->shifterOperand = 0;
79 cpu->shifterCarryOut = shiftVal >> 31;
80 } else {
81 cpu->shifterOperand = 0;
82 cpu->shifterCarryOut = 0;
83 }
84 } else {
85 int immediate = (opcode & 0x00000F80) >> 7;
86 if (immediate) {
87 cpu->shifterOperand = ((uint32_t) cpu->gprs[rm]) >> immediate;
88 cpu->shifterCarryOut = (cpu->gprs[rm] >> (immediate - 1)) & 1;
89 } else {
90 cpu->shifterOperand = 0;
91 cpu->shifterCarryOut = ARM_SIGN(cpu->gprs[rm]);
92 }
93 }
94}
95
96static inline void _shiftASR(struct ARMCore* cpu, uint32_t opcode) {
97 int rm = opcode & 0x0000000F;
98 if (opcode & 0x00000010) {
99 int rs = (opcode >> 8) & 0x0000000F;
100 ++cpu->cycles;
101 int shift = cpu->gprs[rs];
102 if (rs == ARM_PC) {
103 shift += 4;
104 }
105 shift &= 0xFF;
106 int shiftVal = cpu->gprs[rm];
107 if (rm == ARM_PC) {
108 shiftVal += 4;
109 }
110 if (!shift) {
111 cpu->shifterOperand = shiftVal;
112 cpu->shifterCarryOut = cpu->cpsr.c;
113 } else if (shift < 32) {
114 cpu->shifterOperand = shiftVal >> shift;
115 cpu->shifterCarryOut = (shiftVal >> (shift - 1)) & 1;
116 } else if (cpu->gprs[rm] >> 31) {
117 cpu->shifterOperand = 0xFFFFFFFF;
118 cpu->shifterCarryOut = 1;
119 } else {
120 cpu->shifterOperand = 0;
121 cpu->shifterCarryOut = 0;
122 }
123 } else {
124 int immediate = (opcode & 0x00000F80) >> 7;
125 if (immediate) {
126 cpu->shifterOperand = cpu->gprs[rm] >> immediate;
127 cpu->shifterCarryOut = (cpu->gprs[rm] >> (immediate - 1)) & 1;
128 } else {
129 cpu->shifterCarryOut = ARM_SIGN(cpu->gprs[rm]);
130 cpu->shifterOperand = cpu->shifterCarryOut;
131 }
132 }
133}
134
135static inline void _shiftROR(struct ARMCore* cpu, uint32_t opcode) {
136 int rm = opcode & 0x0000000F;
137 if (opcode & 0x00000010) {
138 int rs = (opcode >> 8) & 0x0000000F;
139 ++cpu->cycles;
140 int shift = cpu->gprs[rs];
141 if (rs == ARM_PC) {
142 shift += 4;
143 }
144 shift &= 0xFF;
145 int shiftVal = cpu->gprs[rm];
146 if (rm == ARM_PC) {
147 shiftVal += 4;
148 }
149 int rotate = shift & 0x1F;
150 if (!shift) {
151 cpu->shifterOperand = shiftVal;
152 cpu->shifterCarryOut = cpu->cpsr.c;
153 } else if (rotate) {
154 cpu->shifterOperand = ROR(shiftVal, rotate);
155 cpu->shifterCarryOut = (shiftVal >> (rotate - 1)) & 1;
156 } else {
157 cpu->shifterOperand = shiftVal;
158 cpu->shifterCarryOut = ARM_SIGN(shiftVal);
159 }
160 } else {
161 int immediate = (opcode & 0x00000F80) >> 7;
162 if (immediate) {
163 cpu->shifterOperand = ROR(cpu->gprs[rm], immediate);
164 cpu->shifterCarryOut = (cpu->gprs[rm] >> (immediate - 1)) & 1;
165 } else {
166 // RRX
167 cpu->shifterOperand = (cpu->cpsr.c << 31) | (((uint32_t) cpu->gprs[rm]) >> 1);
168 cpu->shifterCarryOut = cpu->gprs[rm] & 0x00000001;
169 }
170 }
171}
172
173static inline void _immediate(struct ARMCore* cpu, uint32_t opcode) {
174 int rotate = (opcode & 0x00000F00) >> 7;
175 int immediate = opcode & 0x000000FF;
176 if (!rotate) {
177 cpu->shifterOperand = immediate;
178 cpu->shifterCarryOut = cpu->cpsr.c;
179 } else {
180 cpu->shifterOperand = ROR(immediate, rotate);
181 cpu->shifterCarryOut = ARM_SIGN(cpu->shifterOperand);
182 }
183}
184
185// Instruction definitions
186// Beware pre-processor antics
187
188#define ARM_ADDITION_S(M, N, D) \
189 if (rd == ARM_PC && _ARMModeHasSPSR(cpu->cpsr.priv)) { \
190 cpu->cpsr = cpu->spsr; \
191 _ARMReadCPSR(cpu); \
192 } else { \
193 cpu->cpsr.n = ARM_SIGN(D); \
194 cpu->cpsr.z = !(D); \
195 cpu->cpsr.c = ARM_CARRY_FROM(M, N, D); \
196 cpu->cpsr.v = ARM_V_ADDITION(M, N, D); \
197 }
198
199#define ARM_SUBTRACTION_S(M, N, D) \
200 if (rd == ARM_PC && _ARMModeHasSPSR(cpu->cpsr.priv)) { \
201 cpu->cpsr = cpu->spsr; \
202 _ARMReadCPSR(cpu); \
203 } else { \
204 cpu->cpsr.n = ARM_SIGN(D); \
205 cpu->cpsr.z = !(D); \
206 cpu->cpsr.c = ARM_BORROW_FROM(M, N, D); \
207 cpu->cpsr.v = ARM_V_SUBTRACTION(M, N, D); \
208 }
209
210#define ARM_SUBTRACTION_CARRY_S(M, N, D, C) \
211 if (rd == ARM_PC && _ARMModeHasSPSR(cpu->cpsr.priv)) { \
212 cpu->cpsr = cpu->spsr; \
213 _ARMReadCPSR(cpu); \
214 } else { \
215 cpu->cpsr.n = ARM_SIGN(D); \
216 cpu->cpsr.z = !(D); \
217 cpu->cpsr.c = ARM_BORROW_FROM_CARRY(M, N, D, C); \
218 cpu->cpsr.v = ARM_V_SUBTRACTION(M, N, D); \
219 }
220
221#define ARM_NEUTRAL_S(M, N, D) \
222 if (rd == ARM_PC && _ARMModeHasSPSR(cpu->cpsr.priv)) { \
223 cpu->cpsr = cpu->spsr; \
224 _ARMReadCPSR(cpu); \
225 } else { \
226 cpu->cpsr.n = ARM_SIGN(D); \
227 cpu->cpsr.z = !(D); \
228 cpu->cpsr.c = cpu->shifterCarryOut; \
229 }
230
231#define ARM_NEUTRAL_HI_S(DLO, DHI) \
232 cpu->cpsr.n = ARM_SIGN(DHI); \
233 cpu->cpsr.z = !((DHI) | (DLO));
234
235#define ADDR_MODE_2_I_TEST (opcode & 0x00000F80)
236#define ADDR_MODE_2_I ((opcode & 0x00000F80) >> 7)
237#define ADDR_MODE_2_ADDRESS (address)
238#define ADDR_MODE_2_RN (cpu->gprs[rn])
239#define ADDR_MODE_2_RM (cpu->gprs[rm])
240#define ADDR_MODE_2_IMMEDIATE (opcode & 0x00000FFF)
241#define ADDR_MODE_2_INDEX(U_OP, M) (cpu->gprs[rn] U_OP M)
242#define ADDR_MODE_2_WRITEBACK(ADDR) \
243 cpu->gprs[rn] = ADDR; \
244 if (UNLIKELY(rn == ARM_PC)) { \
245 ARM_WRITE_PC; \
246 }
247
248#define ADDR_MODE_2_LSL (cpu->gprs[rm] << ADDR_MODE_2_I)
249#define ADDR_MODE_2_LSR (ADDR_MODE_2_I_TEST ? ((uint32_t) cpu->gprs[rm]) >> ADDR_MODE_2_I : 0)
250#define ADDR_MODE_2_ASR (ADDR_MODE_2_I_TEST ? ((int32_t) cpu->gprs[rm]) >> ADDR_MODE_2_I : ((int32_t) cpu->gprs[rm]) >> 31)
251#define ADDR_MODE_2_ROR (ADDR_MODE_2_I_TEST ? ROR(cpu->gprs[rm], ADDR_MODE_2_I) : (cpu->cpsr.c << 31) | (((uint32_t) cpu->gprs[rm]) >> 1))
252
253#define ADDR_MODE_3_ADDRESS ADDR_MODE_2_ADDRESS
254#define ADDR_MODE_3_RN ADDR_MODE_2_RN
255#define ADDR_MODE_3_RM ADDR_MODE_2_RM
256#define ADDR_MODE_3_IMMEDIATE (((opcode & 0x00000F00) >> 4) | (opcode & 0x0000000F))
257#define ADDR_MODE_3_INDEX(U_OP, M) ADDR_MODE_2_INDEX(U_OP, M)
258#define ADDR_MODE_3_WRITEBACK(ADDR) ADDR_MODE_2_WRITEBACK(ADDR)
259
260#define ADDR_MODE_4_WRITEBACK_LDM \
261 if (!((1 << rn) & rs)) { \
262 cpu->gprs[rn] = address; \
263 }
264
265#define ADDR_MODE_4_WRITEBACK_LDMv5 ADDR_MODE_4_WRITEBACK_LDM
266
267#define ADDR_MODE_4_WRITEBACK_STM cpu->gprs[rn] = address;
268
269#define ARM_LOAD_POST_BODY \
270 currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activeSeqCycles32; \
271 if (rd == ARM_PC) { \
272 ARM_WRITE_PC; \
273 }
274
275#define ARM_STORE_POST_BODY \
276 currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activeSeqCycles32;
277
278#define DEFINE_INSTRUCTION_ARM(NAME, BODY) \
279 static void _ARMInstruction ## NAME (struct ARMCore* cpu, uint32_t opcode) { \
280 int currentCycles = ARM_PREFETCH_CYCLES; \
281 BODY; \
282 cpu->cycles += currentCycles; \
283 }
284
285#define DEFINE_ALU_INSTRUCTION_EX_ARM(NAME, S_BODY, SHIFTER, BODY) \
286 DEFINE_INSTRUCTION_ARM(NAME, \
287 int rd = (opcode >> 12) & 0xF; \
288 int rn = (opcode >> 16) & 0xF; \
289 UNUSED(rn); \
290 SHIFTER(cpu, opcode); \
291 BODY; \
292 S_BODY; \
293 if (rd == ARM_PC) { \
294 if (cpu->executionMode == MODE_ARM) { \
295 ARM_WRITE_PC; \
296 } else { \
297 THUMB_WRITE_PC; \
298 } \
299 })
300
301#define DEFINE_ALU_INSTRUCTION_ARM(NAME, S_BODY, BODY) \
302 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _LSL, , _shiftLSL, BODY) \
303 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## S_LSL, S_BODY, _shiftLSL, BODY) \
304 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _LSR, , _shiftLSR, BODY) \
305 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## S_LSR, S_BODY, _shiftLSR, BODY) \
306 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _ASR, , _shiftASR, BODY) \
307 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## S_ASR, S_BODY, _shiftASR, BODY) \
308 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _ROR, , _shiftROR, BODY) \
309 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## S_ROR, S_BODY, _shiftROR, BODY) \
310 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## I, , _immediate, BODY) \
311 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## SI, S_BODY, _immediate, BODY)
312
313#define DEFINE_ALU_INSTRUCTION_S_ONLY_ARM(NAME, S_BODY, BODY) \
314 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _LSL, S_BODY, _shiftLSL, BODY) \
315 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _LSR, S_BODY, _shiftLSR, BODY) \
316 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _ASR, S_BODY, _shiftASR, BODY) \
317 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## _ROR, S_BODY, _shiftROR, BODY) \
318 DEFINE_ALU_INSTRUCTION_EX_ARM(NAME ## I, S_BODY, _immediate, BODY)
319
320#define DEFINE_MULTIPLY_INSTRUCTION_EX_ARM(NAME, BODY, S_BODY) \
321 DEFINE_INSTRUCTION_ARM(NAME, \
322 int rd = (opcode >> 16) & 0xF; \
323 int rs = (opcode >> 8) & 0xF; \
324 int rm = opcode & 0xF; \
325 if (rd == ARM_PC) { \
326 return; \
327 } \
328 ARM_WAIT_MUL(cpu->gprs[rs]); \
329 BODY; \
330 S_BODY; \
331 currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activeSeqCycles32)
332
333#define DEFINE_MULTIPLY_INSTRUCTION_2_EX_ARM(NAME, BODY, S_BODY, WAIT) \
334 DEFINE_INSTRUCTION_ARM(NAME, \
335 int rd = (opcode >> 12) & 0xF; \
336 int rdHi = (opcode >> 16) & 0xF; \
337 int rs = (opcode >> 8) & 0xF; \
338 int rm = opcode & 0xF; \
339 if (rdHi == ARM_PC || rd == ARM_PC) { \
340 return; \
341 } \
342 currentCycles += cpu->memory.stall(cpu, WAIT); \
343 BODY; \
344 S_BODY; \
345 currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activeSeqCycles32)
346
347#define DEFINE_MULTIPLY_INSTRUCTION_ARM(NAME, BODY, S_BODY) \
348 DEFINE_MULTIPLY_INSTRUCTION_EX_ARM(NAME, BODY, ) \
349 DEFINE_MULTIPLY_INSTRUCTION_EX_ARM(NAME ## S, BODY, S_BODY)
350
351#define DEFINE_MULTIPLY_INSTRUCTION_2_ARM(NAME, BODY, S_BODY, WAIT) \
352 DEFINE_MULTIPLY_INSTRUCTION_2_EX_ARM(NAME, BODY, , WAIT) \
353 DEFINE_MULTIPLY_INSTRUCTION_2_EX_ARM(NAME ## S, BODY, S_BODY, WAIT)
354
355#define DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME, ADDRESS, WRITEBACK, BODY) \
356 DEFINE_INSTRUCTION_ARM(NAME, \
357 uint32_t address; \
358 int rn = (opcode >> 16) & 0xF; \
359 int rd = (opcode >> 12) & 0xF; \
360 int rm = opcode & 0xF; \
361 UNUSED(rm); \
362 address = ADDRESS; \
363 WRITEBACK; \
364 BODY;)
365
366#define DEFINE_LOAD_STORE_INSTRUCTION_SHIFTER_ARM(NAME, SHIFTER, BODY) \
367 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME, ADDR_MODE_2_RN, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(-, SHIFTER)), BODY) \
368 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## U, ADDR_MODE_2_RN, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(+, SHIFTER)), BODY) \
369 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## P, ADDR_MODE_2_INDEX(-, SHIFTER), , BODY) \
370 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## PW, ADDR_MODE_2_INDEX(-, SHIFTER), ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_ADDRESS), BODY) \
371 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## PU, ADDR_MODE_2_INDEX(+, SHIFTER), , BODY) \
372 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## PUW, ADDR_MODE_2_INDEX(+, SHIFTER), ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_ADDRESS), BODY)
373
374#define DEFINE_LOAD_STORE_INSTRUCTION_ARM(NAME, BODY) \
375 DEFINE_LOAD_STORE_INSTRUCTION_SHIFTER_ARM(NAME ## _LSL_, ADDR_MODE_2_LSL, BODY) \
376 DEFINE_LOAD_STORE_INSTRUCTION_SHIFTER_ARM(NAME ## _LSR_, ADDR_MODE_2_LSR, BODY) \
377 DEFINE_LOAD_STORE_INSTRUCTION_SHIFTER_ARM(NAME ## _ASR_, ADDR_MODE_2_ASR, BODY) \
378 DEFINE_LOAD_STORE_INSTRUCTION_SHIFTER_ARM(NAME ## _ROR_, ADDR_MODE_2_ROR, BODY) \
379 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## I, ADDR_MODE_2_RN, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(-, ADDR_MODE_2_IMMEDIATE)), BODY) \
380 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IU, ADDR_MODE_2_RN, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(+, ADDR_MODE_2_IMMEDIATE)), BODY) \
381 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IP, ADDR_MODE_2_INDEX(-, ADDR_MODE_2_IMMEDIATE), , BODY) \
382 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IPW, ADDR_MODE_2_INDEX(-, ADDR_MODE_2_IMMEDIATE), ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_ADDRESS), BODY) \
383 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IPU, ADDR_MODE_2_INDEX(+, ADDR_MODE_2_IMMEDIATE), , BODY) \
384 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IPUW, ADDR_MODE_2_INDEX(+, ADDR_MODE_2_IMMEDIATE), ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_ADDRESS), BODY) \
385
386#define DEFINE_LOAD_STORE_MODE_3_INSTRUCTION_ARM(NAME, BODY) \
387 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME, ADDR_MODE_3_RN, ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_INDEX(-, ADDR_MODE_3_RM)), BODY) \
388 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## U, ADDR_MODE_3_RN, ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_INDEX(+, ADDR_MODE_3_RM)), BODY) \
389 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## P, ADDR_MODE_3_INDEX(-, ADDR_MODE_3_RM), , BODY) \
390 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## PW, ADDR_MODE_3_INDEX(-, ADDR_MODE_3_RM), ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_ADDRESS), BODY) \
391 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## PU, ADDR_MODE_3_INDEX(+, ADDR_MODE_3_RM), , BODY) \
392 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## PUW, ADDR_MODE_3_INDEX(+, ADDR_MODE_3_RM), ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_ADDRESS), BODY) \
393 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## I, ADDR_MODE_3_RN, ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_INDEX(-, ADDR_MODE_3_IMMEDIATE)), BODY) \
394 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IU, ADDR_MODE_3_RN, ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_INDEX(+, ADDR_MODE_3_IMMEDIATE)), BODY) \
395 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IP, ADDR_MODE_3_INDEX(-, ADDR_MODE_3_IMMEDIATE), , BODY) \
396 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IPW, ADDR_MODE_3_INDEX(-, ADDR_MODE_3_IMMEDIATE), ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_ADDRESS), BODY) \
397 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IPU, ADDR_MODE_3_INDEX(+, ADDR_MODE_3_IMMEDIATE), , BODY) \
398 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IPUW, ADDR_MODE_3_INDEX(+, ADDR_MODE_3_IMMEDIATE), ADDR_MODE_3_WRITEBACK(ADDR_MODE_3_ADDRESS), BODY) \
399
400#define DEFINE_LOAD_STORE_T_INSTRUCTION_SHIFTER_ARM(NAME, SHIFTER, BODY) \
401 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME, SHIFTER, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(-, ADDR_MODE_2_RM)), BODY) \
402 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## U, SHIFTER, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(+, ADDR_MODE_2_RM)), BODY) \
403
404#define DEFINE_LOAD_STORE_T_INSTRUCTION_ARM(NAME, BODY) \
405 DEFINE_LOAD_STORE_T_INSTRUCTION_SHIFTER_ARM(NAME ## _LSL_, ADDR_MODE_2_LSL, BODY) \
406 DEFINE_LOAD_STORE_T_INSTRUCTION_SHIFTER_ARM(NAME ## _LSR_, ADDR_MODE_2_LSR, BODY) \
407 DEFINE_LOAD_STORE_T_INSTRUCTION_SHIFTER_ARM(NAME ## _ASR_, ADDR_MODE_2_ASR, BODY) \
408 DEFINE_LOAD_STORE_T_INSTRUCTION_SHIFTER_ARM(NAME ## _ROR_, ADDR_MODE_2_ROR, BODY) \
409 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## I, ADDR_MODE_2_RN, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(-, ADDR_MODE_2_IMMEDIATE)), BODY) \
410 DEFINE_LOAD_STORE_INSTRUCTION_EX_ARM(NAME ## IU, ADDR_MODE_2_RN, ADDR_MODE_2_WRITEBACK(ADDR_MODE_2_INDEX(+, ADDR_MODE_2_IMMEDIATE)), BODY) \
411
412#define ARM_MS_PRE \
413 enum PrivilegeMode privilegeMode = cpu->privilegeMode; \
414 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
415
416#define ARM_MS_POST ARMSetPrivilegeMode(cpu, privilegeMode);
417
418#define DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME, LS, WRITEBACK, S_PRE, S_POST, DIRECTION, POST_BODY) \
419 DEFINE_INSTRUCTION_ARM(NAME, \
420 int rn = (opcode >> 16) & 0xF; \
421 int rs = opcode & 0x0000FFFF; \
422 uint32_t address = cpu->gprs[rn]; \
423 S_PRE; \
424 address = cpu->memory. LS ## Multiple(cpu, address, rs, LSM_ ## DIRECTION, ¤tCycles); \
425 S_POST; \
426 POST_BODY; \
427 WRITEBACK;)
428
429
430#define DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM_NO_S(NAME, LS, POST_BODY) \
431 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## DA, LS, , , , DA, POST_BODY) \
432 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## DAW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, , , DA, POST_BODY) \
433 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## DB, LS, , , , DB, POST_BODY) \
434 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## DBW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, , , DB, POST_BODY) \
435 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## IA, LS, , , , IA, POST_BODY) \
436 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## IAW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, , , IA, POST_BODY) \
437 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## IB, LS, , , , IB, POST_BODY) \
438 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## IBW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, , , IB, POST_BODY) \
439
440#define DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(NAME, LS, POST_BODY) \
441 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM_NO_S(NAME, LS, POST_BODY) \
442 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SDA, LS, , ARM_MS_PRE, ARM_MS_POST, DA, POST_BODY) \
443 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SDAW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, ARM_MS_PRE, ARM_MS_POST, DA, POST_BODY) \
444 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SDB, LS, , ARM_MS_PRE, ARM_MS_POST, DB, POST_BODY) \
445 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SDBW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, ARM_MS_PRE, ARM_MS_POST, DB, POST_BODY) \
446 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SIA, LS, , ARM_MS_PRE, ARM_MS_POST, IA, POST_BODY) \
447 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SIAW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, ARM_MS_PRE, ARM_MS_POST, IA, POST_BODY) \
448 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SIB, LS, , ARM_MS_PRE, ARM_MS_POST, IB, POST_BODY) \
449 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_EX_ARM(NAME ## SIBW, LS, ADDR_MODE_4_WRITEBACK_ ## NAME, ARM_MS_PRE, ARM_MS_POST, IB, POST_BODY)
450
451// Begin ALU definitions
452
453DEFINE_ALU_INSTRUCTION_ARM(ADD, ARM_ADDITION_S(n, cpu->shifterOperand, cpu->gprs[rd]),
454 int32_t n = cpu->gprs[rn];
455 cpu->gprs[rd] = n + cpu->shifterOperand;)
456
457DEFINE_ALU_INSTRUCTION_ARM(ADC, ARM_ADDITION_S(n, cpu->shifterOperand, cpu->gprs[rd]),
458 int32_t n = cpu->gprs[rn];
459 cpu->gprs[rd] = n + cpu->shifterOperand + cpu->cpsr.c;)
460
461DEFINE_ALU_INSTRUCTION_ARM(AND, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, cpu->gprs[rd]),
462 cpu->gprs[rd] = cpu->gprs[rn] & cpu->shifterOperand;)
463
464DEFINE_ALU_INSTRUCTION_ARM(BIC, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, cpu->gprs[rd]),
465 cpu->gprs[rd] = cpu->gprs[rn] & ~cpu->shifterOperand;)
466
467DEFINE_ALU_INSTRUCTION_S_ONLY_ARM(CMN, ARM_ADDITION_S(cpu->gprs[rn], cpu->shifterOperand, aluOut),
468 int32_t aluOut = cpu->gprs[rn] + cpu->shifterOperand;)
469
470DEFINE_ALU_INSTRUCTION_S_ONLY_ARM(CMP, ARM_SUBTRACTION_S(cpu->gprs[rn], cpu->shifterOperand, aluOut),
471 int32_t aluOut = cpu->gprs[rn] - cpu->shifterOperand;)
472
473DEFINE_ALU_INSTRUCTION_ARM(EOR, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, cpu->gprs[rd]),
474 cpu->gprs[rd] = cpu->gprs[rn] ^ cpu->shifterOperand;)
475
476DEFINE_ALU_INSTRUCTION_ARM(MOV, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, cpu->gprs[rd]),
477 cpu->gprs[rd] = cpu->shifterOperand;)
478
479DEFINE_ALU_INSTRUCTION_ARM(MVN, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, cpu->gprs[rd]),
480 cpu->gprs[rd] = ~cpu->shifterOperand;)
481
482DEFINE_ALU_INSTRUCTION_ARM(ORR, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, cpu->gprs[rd]),
483 cpu->gprs[rd] = cpu->gprs[rn] | cpu->shifterOperand;)
484
485DEFINE_ALU_INSTRUCTION_ARM(RSB, ARM_SUBTRACTION_S(cpu->shifterOperand, n, cpu->gprs[rd]),
486 int32_t n = cpu->gprs[rn];
487 cpu->gprs[rd] = cpu->shifterOperand - n;)
488
489DEFINE_ALU_INSTRUCTION_ARM(RSC, ARM_SUBTRACTION_CARRY_S(cpu->shifterOperand, n, cpu->gprs[rd], !cpu->cpsr.c),
490 int32_t n = cpu->gprs[rn];
491 cpu->gprs[rd] = cpu->shifterOperand - n - !cpu->cpsr.c;)
492
493DEFINE_ALU_INSTRUCTION_ARM(SBC, ARM_SUBTRACTION_CARRY_S(n, cpu->shifterOperand, cpu->gprs[rd], !cpu->cpsr.c),
494 int32_t n = cpu->gprs[rn];
495 cpu->gprs[rd] = n - cpu->shifterOperand - !cpu->cpsr.c;)
496
497DEFINE_ALU_INSTRUCTION_ARM(SUB, ARM_SUBTRACTION_S(n, cpu->shifterOperand, cpu->gprs[rd]),
498 int32_t n = cpu->gprs[rn];
499 cpu->gprs[rd] = n - cpu->shifterOperand;)
500
501DEFINE_ALU_INSTRUCTION_S_ONLY_ARM(TEQ, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, aluOut),
502 int32_t aluOut = cpu->gprs[rn] ^ cpu->shifterOperand;)
503
504DEFINE_ALU_INSTRUCTION_S_ONLY_ARM(TST, ARM_NEUTRAL_S(cpu->gprs[rn], cpu->shifterOperand, aluOut),
505 int32_t aluOut = cpu->gprs[rn] & cpu->shifterOperand;)
506
507// End ALU definitions
508
509// Begin multiply definitions
510
511DEFINE_MULTIPLY_INSTRUCTION_2_ARM(MLA, cpu->gprs[rdHi] = cpu->gprs[rm] * cpu->gprs[rs] + cpu->gprs[rd], ARM_NEUTRAL_S(, , cpu->gprs[rdHi]), 2)
512DEFINE_MULTIPLY_INSTRUCTION_ARM(MUL, cpu->gprs[rd] = cpu->gprs[rm] * cpu->gprs[rs], ARM_NEUTRAL_S(cpu->gprs[rm], cpu->gprs[rs], cpu->gprs[rd]))
513
514DEFINE_MULTIPLY_INSTRUCTION_2_ARM(SMLAL,
515 int64_t d = ((int64_t) cpu->gprs[rm]) * ((int64_t) cpu->gprs[rs]);
516 int32_t dm = cpu->gprs[rd];
517 int32_t dn = d;
518 cpu->gprs[rd] = dm + dn;
519 cpu->gprs[rdHi] = cpu->gprs[rdHi] + (d >> 32) + ARM_CARRY_FROM(dm, dn, cpu->gprs[rd]);,
520 ARM_NEUTRAL_HI_S(cpu->gprs[rd], cpu->gprs[rdHi]), 3)
521
522DEFINE_MULTIPLY_INSTRUCTION_2_ARM(SMULL,
523 int64_t d = ((int64_t) cpu->gprs[rm]) * ((int64_t) cpu->gprs[rs]);
524 cpu->gprs[rd] = d;
525 cpu->gprs[rdHi] = d >> 32;,
526 ARM_NEUTRAL_HI_S(cpu->gprs[rd], cpu->gprs[rdHi]), 2)
527
528DEFINE_MULTIPLY_INSTRUCTION_2_ARM(UMLAL,
529 uint64_t d = ARM_UXT_64(cpu->gprs[rm]) * ARM_UXT_64(cpu->gprs[rs]);
530 int32_t dm = cpu->gprs[rd];
531 int32_t dn = d;
532 cpu->gprs[rd] = dm + dn;
533 cpu->gprs[rdHi] = cpu->gprs[rdHi] + (d >> 32) + ARM_CARRY_FROM(dm, dn, cpu->gprs[rd]);,
534 ARM_NEUTRAL_HI_S(cpu->gprs[rd], cpu->gprs[rdHi]), 3)
535
536DEFINE_MULTIPLY_INSTRUCTION_2_ARM(UMULL,
537 uint64_t d = ARM_UXT_64(cpu->gprs[rm]) * ARM_UXT_64(cpu->gprs[rs]);
538 cpu->gprs[rd] = d;
539 cpu->gprs[rdHi] = d >> 32;,
540 ARM_NEUTRAL_HI_S(cpu->gprs[rd], cpu->gprs[rdHi]), 2)
541
542// End multiply definitions
543
544// Begin load/store definitions
545
546DEFINE_LOAD_STORE_INSTRUCTION_ARM(LDR, cpu->gprs[rd] = cpu->memory.load32(cpu, address, ¤tCycles); ARM_LOAD_POST_BODY;)
547DEFINE_LOAD_STORE_INSTRUCTION_ARM(LDRB, cpu->gprs[rd] = cpu->memory.load8(cpu, address, ¤tCycles); ARM_LOAD_POST_BODY;)
548DEFINE_LOAD_STORE_MODE_3_INSTRUCTION_ARM(LDRH, cpu->gprs[rd] = cpu->memory.load16(cpu, address, ¤tCycles); ARM_LOAD_POST_BODY;)
549DEFINE_LOAD_STORE_MODE_3_INSTRUCTION_ARM(LDRSB, cpu->gprs[rd] = ARM_SXT_8(cpu->memory.load8(cpu, address, ¤tCycles)); ARM_LOAD_POST_BODY;)
550DEFINE_LOAD_STORE_MODE_3_INSTRUCTION_ARM(LDRSH, cpu->gprs[rd] = address & 1 ? ARM_SXT_8(cpu->memory.load16(cpu, address, ¤tCycles)) : ARM_SXT_16(cpu->memory.load16(cpu, address, ¤tCycles)); ARM_LOAD_POST_BODY;)
551DEFINE_LOAD_STORE_INSTRUCTION_ARM(STR, cpu->memory.store32(cpu, address, cpu->gprs[rd], ¤tCycles); ARM_STORE_POST_BODY;)
552DEFINE_LOAD_STORE_INSTRUCTION_ARM(STRB, cpu->memory.store8(cpu, address, cpu->gprs[rd], ¤tCycles); ARM_STORE_POST_BODY;)
553DEFINE_LOAD_STORE_MODE_3_INSTRUCTION_ARM(STRH, cpu->memory.store16(cpu, address, cpu->gprs[rd], ¤tCycles); ARM_STORE_POST_BODY;)
554
555DEFINE_LOAD_STORE_T_INSTRUCTION_ARM(LDRBT,
556 enum PrivilegeMode priv = cpu->privilegeMode;
557 ARMSetPrivilegeMode(cpu, MODE_USER);
558 int32_t r = cpu->memory.load8(cpu, address, ¤tCycles);
559 ARMSetPrivilegeMode(cpu, priv);
560 cpu->gprs[rd] = r;
561 ARM_LOAD_POST_BODY;)
562
563DEFINE_LOAD_STORE_T_INSTRUCTION_ARM(LDRT,
564 enum PrivilegeMode priv = cpu->privilegeMode;
565 ARMSetPrivilegeMode(cpu, MODE_USER);
566 int32_t r = cpu->memory.load32(cpu, address, ¤tCycles);
567 ARMSetPrivilegeMode(cpu, priv);
568 cpu->gprs[rd] = r;
569 ARM_LOAD_POST_BODY;)
570
571DEFINE_LOAD_STORE_T_INSTRUCTION_ARM(STRBT,
572 enum PrivilegeMode priv = cpu->privilegeMode;
573 int32_t r = cpu->gprs[rd];
574 ARMSetPrivilegeMode(cpu, MODE_USER);
575 cpu->memory.store8(cpu, address, r, ¤tCycles);
576 ARMSetPrivilegeMode(cpu, priv);
577 ARM_STORE_POST_BODY;)
578
579DEFINE_LOAD_STORE_T_INSTRUCTION_ARM(STRT,
580 enum PrivilegeMode priv = cpu->privilegeMode;
581 int32_t r = cpu->gprs[rd];
582 ARMSetPrivilegeMode(cpu, MODE_USER);
583 cpu->memory.store32(cpu, address, r, ¤tCycles);
584 ARMSetPrivilegeMode(cpu, priv);
585 ARM_STORE_POST_BODY;)
586
587DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(LDM,
588 load,
589 currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activeSeqCycles32;
590 if (rs & 0x8000) {
591 ARM_WRITE_PC;
592 })
593
594DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM_NO_S(LDMv5,
595 load,
596 currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activeSeqCycles32;
597 if (rs & 0x8000) {
598 _ARMSetMode(cpu, cpu->gprs[ARM_PC] & 0x00000001);
599 cpu->gprs[ARM_PC] &= 0xFFFFFFFE;
600 if (cpu->executionMode == MODE_THUMB) {
601 THUMB_WRITE_PC;
602 } else {
603 ARM_WRITE_PC;
604
605 }
606 })
607
608DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(STM,
609 store,
610 ARM_STORE_POST_BODY;)
611
612DEFINE_INSTRUCTION_ARM(SWP,
613 int rm = opcode & 0xF;
614 int rd = (opcode >> 12) & 0xF;
615 int rn = (opcode >> 16) & 0xF;
616 int32_t d = cpu->memory.load32(cpu, cpu->gprs[rn], ¤tCycles);
617 cpu->memory.store32(cpu, cpu->gprs[rn], cpu->gprs[rm], ¤tCycles);
618 cpu->gprs[rd] = d;)
619
620DEFINE_INSTRUCTION_ARM(SWPB,
621 int rm = opcode & 0xF;
622 int rd = (opcode >> 12) & 0xF;
623 int rn = (opcode >> 16) & 0xF;
624 int32_t d = cpu->memory.load8(cpu, cpu->gprs[rn], ¤tCycles);
625 cpu->memory.store8(cpu, cpu->gprs[rn], cpu->gprs[rm], ¤tCycles);
626 cpu->gprs[rd] = d;)
627
628// End load/store definitions
629
630// Begin branch definitions
631
632DEFINE_INSTRUCTION_ARM(B,
633 int32_t offset = opcode << 8;
634 offset >>= 6;
635 cpu->gprs[ARM_PC] += offset;
636 ARM_WRITE_PC;)
637
638DEFINE_INSTRUCTION_ARM(BL,
639 int32_t immediate = (opcode & 0x00FFFFFF) << 8;
640 cpu->gprs[ARM_LR] = cpu->gprs[ARM_PC] - WORD_SIZE_ARM;
641 cpu->gprs[ARM_PC] += immediate >> 6;
642 ARM_WRITE_PC;)
643
644DEFINE_INSTRUCTION_ARM(BX,
645 int rm = opcode & 0x0000000F;
646 _ARMSetMode(cpu, cpu->gprs[rm] & 0x00000001);
647 cpu->gprs[ARM_PC] = cpu->gprs[rm] & 0xFFFFFFFE;
648 if (cpu->executionMode == MODE_THUMB) {
649 THUMB_WRITE_PC;
650 } else {
651 ARM_WRITE_PC;
652
653 })
654DEFINE_INSTRUCTION_ARM(BLX2,
655 int rm = opcode & 0x0000000F;
656 cpu->gprs[ARM_LR] = cpu->gprs[ARM_PC] - WORD_SIZE_ARM;
657 _ARMSetMode(cpu, cpu->gprs[rm] & 0x00000001);
658 cpu->gprs[ARM_PC] = cpu->gprs[rm] & 0xFFFFFFFE;
659 if (cpu->executionMode == MODE_THUMB) {
660 THUMB_WRITE_PC;
661 } else {
662 ARM_WRITE_PC;
663 })
664
665// End branch definitions
666
667// Begin coprocessor definitions
668
669#define DEFINE_COPROCESSOR_INSTRUCTION(NAME, BODY) \
670 DEFINE_INSTRUCTION_ARM(NAME, \
671 int op1 = (opcode >> 21) & 7; \
672 int op2 = (opcode >> 5) & 7; \
673 int rd = (opcode >> 12) & 0xF; \
674 int cp = (opcode >> 8) & 0xF; \
675 int crn = (opcode >> 16) & 0xF; \
676 int crm = opcode & 0xF; \
677 UNUSED(op1); \
678 UNUSED(op2); \
679 UNUSED(rd); \
680 UNUSED(crn); \
681 UNUSED(crm); \
682 BODY;)
683
684DEFINE_COPROCESSOR_INSTRUCTION(MRC,
685 if (cp == 15 && cpu->irqh.readCP15) {
686 cpu->gprs[rd] = cpu->irqh.readCP15(cpu, crn, crm, op1, op2);
687 } else {
688 ARM_STUB;
689 })
690
691DEFINE_COPROCESSOR_INSTRUCTION(MCR,
692 if (cp == 15 && cpu->irqh.writeCP15) {
693 cpu->irqh.writeCP15(cpu, crn, crm, op1, op2, cpu->gprs[rd]);
694 } else {
695 ARM_STUB;
696 })
697
698DEFINE_INSTRUCTION_ARM(CDP, ARM_STUB)
699DEFINE_INSTRUCTION_ARM(LDC, ARM_STUB)
700DEFINE_INSTRUCTION_ARM(STC, ARM_STUB)
701
702// Begin miscellaneous definitions
703
704DEFINE_INSTRUCTION_ARM(CLZ,
705 int rm = opcode & 0xF;
706 int rd = (opcode >> 12) & 0xF;
707 cpu->gprs[rd] = clz32(cpu->gprs[rm]);)
708
709DEFINE_INSTRUCTION_ARM(BKPT, cpu->irqh.bkpt32(cpu, ((opcode >> 4) & 0xFFF0) | (opcode & 0xF))); // Not strictly in ARMv4T, but here for convenience
710DEFINE_INSTRUCTION_ARM(ILL, ARM_ILL) // Illegal opcode
711
712DEFINE_INSTRUCTION_ARM(MSR,
713 int c = opcode & 0x00010000;
714 int f = opcode & 0x00080000;
715 int32_t operand = cpu->gprs[opcode & 0x0000000F];
716 int32_t mask = (c ? 0x000000FF : 0) | (f ? 0xFF000000 : 0);
717 if (mask & PSR_USER_MASK) {
718 cpu->cpsr.packed = (cpu->cpsr.packed & ~PSR_USER_MASK) | (operand & PSR_USER_MASK);
719 }
720 if (mask & PSR_STATE_MASK) {
721 cpu->cpsr.packed = (cpu->cpsr.packed & ~PSR_STATE_MASK) | (operand & PSR_STATE_MASK);
722 }
723 if (cpu->privilegeMode != MODE_USER && (mask & PSR_PRIV_MASK)) {
724 ARMSetPrivilegeMode(cpu, (enum PrivilegeMode) ((operand & 0x0000000F) | 0x00000010));
725 cpu->cpsr.packed = (cpu->cpsr.packed & ~PSR_PRIV_MASK) | (operand & PSR_PRIV_MASK);
726 }
727 _ARMReadCPSR(cpu);
728 if (cpu->executionMode == MODE_THUMB) {
729 LOAD_16(cpu->prefetch[0], (cpu->gprs[ARM_PC] - WORD_SIZE_THUMB) & cpu->memory.activeMask, cpu->memory.activeRegion);
730 LOAD_16(cpu->prefetch[1], cpu->gprs[ARM_PC] & cpu->memory.activeMask, cpu->memory.activeRegion);
731 } else {
732 LOAD_32(cpu->prefetch[0], (cpu->gprs[ARM_PC] - WORD_SIZE_ARM) & cpu->memory.activeMask, cpu->memory.activeRegion);
733 LOAD_32(cpu->prefetch[1], cpu->gprs[ARM_PC] & cpu->memory.activeMask, cpu->memory.activeRegion);
734 })
735
736DEFINE_INSTRUCTION_ARM(MSRR,
737 int c = opcode & 0x00010000;
738 int f = opcode & 0x00080000;
739 int32_t operand = cpu->gprs[opcode & 0x0000000F];
740 int32_t mask = (c ? 0x000000FF : 0) | (f ? 0xFF000000 : 0);
741 mask &= PSR_USER_MASK | PSR_PRIV_MASK | PSR_STATE_MASK;
742 cpu->spsr.packed = (cpu->spsr.packed & ~mask) | (operand & mask) | 0x00000010;)
743
744DEFINE_INSTRUCTION_ARM(MRS, \
745 int rd = (opcode >> 12) & 0xF; \
746 cpu->gprs[rd] = cpu->cpsr.packed;)
747
748DEFINE_INSTRUCTION_ARM(MRSR, \
749 int rd = (opcode >> 12) & 0xF; \
750 cpu->gprs[rd] = cpu->spsr.packed;)
751
752DEFINE_INSTRUCTION_ARM(MSRI,
753 int c = opcode & 0x00010000;
754 int f = opcode & 0x00080000;
755 int rotate = (opcode & 0x00000F00) >> 7;
756 int32_t operand = ROR(opcode & 0x000000FF, rotate);
757 int32_t mask = (c ? 0x000000FF : 0) | (f ? 0xFF000000 : 0);
758 if (mask & PSR_USER_MASK) {
759 cpu->cpsr.packed = (cpu->cpsr.packed & ~PSR_USER_MASK) | (operand & PSR_USER_MASK);
760 }
761 if (mask & PSR_STATE_MASK) {
762 cpu->cpsr.packed = (cpu->cpsr.packed & ~PSR_STATE_MASK) | (operand & PSR_STATE_MASK);
763 }
764 if (cpu->privilegeMode != MODE_USER && (mask & PSR_PRIV_MASK)) {
765 ARMSetPrivilegeMode(cpu, (enum PrivilegeMode) ((operand & 0x0000000F) | 0x00000010));
766 cpu->cpsr.packed = (cpu->cpsr.packed & ~PSR_PRIV_MASK) | (operand & PSR_PRIV_MASK);
767 }
768 _ARMReadCPSR(cpu);
769 if (cpu->executionMode == MODE_THUMB) {
770 LOAD_16(cpu->prefetch[0], (cpu->gprs[ARM_PC] - WORD_SIZE_THUMB) & cpu->memory.activeMask, cpu->memory.activeRegion);
771 LOAD_16(cpu->prefetch[1], cpu->gprs[ARM_PC] & cpu->memory.activeMask, cpu->memory.activeRegion);
772 } else {
773 LOAD_32(cpu->prefetch[0], (cpu->gprs[ARM_PC] - WORD_SIZE_ARM) & cpu->memory.activeMask, cpu->memory.activeRegion);
774 LOAD_32(cpu->prefetch[1], cpu->gprs[ARM_PC] & cpu->memory.activeMask, cpu->memory.activeRegion);
775 })
776
777DEFINE_INSTRUCTION_ARM(MSRRI,
778 int c = opcode & 0x00010000;
779 int f = opcode & 0x00080000;
780 int rotate = (opcode & 0x00000F00) >> 7;
781 int32_t operand = ROR(opcode & 0x000000FF, rotate);
782 int32_t mask = (c ? 0x000000FF : 0) | (f ? 0xFF000000 : 0);
783 mask &= PSR_USER_MASK | PSR_PRIV_MASK | PSR_STATE_MASK;
784 cpu->spsr.packed = (cpu->spsr.packed & ~mask) | (operand & mask) | 0x00000010;)
785
786DEFINE_INSTRUCTION_ARM(SWI, cpu->irqh.swi32(cpu, opcode & 0xFFFFFF))
787
788const ARMInstruction _armv4Table[0x1000] = {
789 DECLARE_ARM_EMITTER_BLOCK(_ARMInstruction, 4)
790};
791
792const ARMInstruction _armv5Table[0x1000] = {
793 DECLARE_ARM_EMITTER_BLOCK(_ARMInstruction, 5)
794};