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  1. #include <stdio.h>
  2. /* ======================================================================== */
  3. /* ========================= LICENSING & COPYRIGHT ======================== */
  4. /* ======================================================================== */
  5. /*
  6.  *                                  MUSASHI
  7.  *                                Version 3.31
  8.  *
  9.  * A portable Motorola M680x0 processor emulation engine.
  10.  * Copyright 1998-2007 Karl Stenerud.  All rights reserved.
  11.  *
  12.  * This code may be freely used for non-commercial purposes as long as this
  13.  * copyright notice remains unaltered in the source code and any binary files
  14.  * containing this code in compiled form.
  15.  *
  16.  * All other lisencing terms must be negotiated with the author
  17.  * (Karl Stenerud).
  18.  *
  19.  * The latest version of this code can be obtained at:
  20.  * http://kstenerud.cjb.net
  21.  */
  22.  
  23.  
  24.  
  25.  
  26. #ifndef M68KCPU__HEADER
  27. #define M68KCPU__HEADER
  28.  
  29. #include <stdint.h>
  30. #include "m68k.h"
  31. #include <limits.h>
  32.  
  33. #if M68K_EMULATE_ADDRESS_ERROR
  34. #include <setjmp.h>
  35. #endif /* M68K_EMULATE_ADDRESS_ERROR */
  36.  
  37. /* ======================================================================== */
  38. /* ==================== ARCHITECTURE-DEPENDANT DEFINES ==================== */
  39. /* ======================================================================== */
  40.  
  41. /* Check for > 32bit sizes */
  42. #if UINT_MAX > 0xffffffff
  43.         #define M68K_INT_GT_32_BIT  1
  44. #else
  45.         #define M68K_INT_GT_32_BIT  0
  46. #endif
  47.  
  48. /* Data types used in this emulation core */
  49. typedef int8_t sint8;
  50. typedef int16_t sint16;
  51. typedef int32_t sint32;
  52. typedef uint8_t uint8;
  53. typedef uint16_t uint16;
  54. typedef uint32_t uint32;
  55.  
  56. /* signed and unsigned int must be at least 32 bits wide */
  57. typedef int_least32_t sint;
  58. typedef uint_least32_t uint;
  59.  
  60. #if M68K_USE_64_BIT
  61. typedef int64_t sint64;
  62. typedef uint64_t uint64;
  63. #else
  64. typedef sint32 sint64;
  65. typedef uint32 uint64;
  66. #endif /* M68K_USE_64_BIT */
  67.  
  68. #define UINT16 uint16_t
  69. #define UINT64 uint64_t
  70.  
  71. #define MAKE_INT_8(A) (sint8)(A)
  72. #define MAKE_INT_16(A) (sint16)(A)
  73. #define MAKE_INT_32(A) (sint32)(A)
  74. #define MAKE_UINT_8(A) (uint8)(A)
  75. #define MAKE_UINT_16(A) (uint16)(A)
  76. #define MAKE_UINT_32(A) (uint32)(A)
  77.  
  78.  
  79. /* ======================================================================== */
  80. /* ============================ GENERAL DEFINES =========================== */
  81. /* ======================================================================== */
  82.  
  83. /* Exception Vectors handled by emulation */
  84. #define EXCEPTION_BUS_ERROR                2 /* This one is not emulated! */
  85. #define EXCEPTION_ADDRESS_ERROR            3 /* This one is partially emulated (doesn't stack a proper frame yet) */
  86. #define EXCEPTION_ILLEGAL_INSTRUCTION      4
  87. #define EXCEPTION_ZERO_DIVIDE              5
  88. #define EXCEPTION_CHK                      6
  89. #define EXCEPTION_TRAPV                    7
  90. #define EXCEPTION_PRIVILEGE_VIOLATION      8
  91. #define EXCEPTION_TRACE                    9
  92. #define EXCEPTION_1010                    10
  93. #define EXCEPTION_1111                    11
  94. #define EXCEPTION_FORMAT_ERROR            14
  95. #define EXCEPTION_UNINITIALIZED_INTERRUPT 15
  96. #define EXCEPTION_SPURIOUS_INTERRUPT      24
  97. #define EXCEPTION_INTERRUPT_AUTOVECTOR    24
  98. #define EXCEPTION_TRAP_BASE               32
  99.  
  100. /* Function codes set by CPU during data/address bus activity */
  101. #define FUNCTION_CODE_USER_DATA          1
  102. #define FUNCTION_CODE_USER_PROGRAM       2
  103. #define FUNCTION_CODE_SUPERVISOR_DATA    5
  104. #define FUNCTION_CODE_SUPERVISOR_PROGRAM 6
  105. #define FUNCTION_CODE_CPU_SPACE          7
  106.  
  107. /* CPU types for deciding what to emulate */
  108. #define CPU_TYPE_000   1
  109. #define CPU_TYPE_008   2
  110. #define CPU_TYPE_010   4
  111. #define CPU_TYPE_EC020 8
  112. #define CPU_TYPE_020   16
  113. #define CPU_TYPE_040   32
  114.  
  115. /* Different ways to stop the CPU */
  116. #define STOP_LEVEL_STOP 1
  117. #define STOP_LEVEL_HALT 2
  118.  
  119. /* Used for 68000 address error processing */
  120. #define INSTRUCTION_YES 0
  121. #define INSTRUCTION_NO  0x08
  122. #define MODE_READ       0x10
  123. #define MODE_WRITE      0
  124.  
  125. #define RUN_MODE_NORMAL          0
  126. #define RUN_MODE_BERR_AERR_RESET 1
  127.  
  128. #ifndef NULL
  129. #define NULL ((void*)0)
  130. #endif
  131.  
  132. /* ======================================================================== */
  133. /* ================================ MACROS ================================ */
  134. /* ======================================================================== */
  135.  
  136.  
  137. /* ---------------------------- General Macros ---------------------------- */
  138.  
  139. /* Bit Isolation Macros */
  140. #define BIT_0(A)  ((A) & 0x00000001)
  141. #define BIT_1(A)  ((A) & 0x00000002)
  142. #define BIT_2(A)  ((A) & 0x00000004)
  143. #define BIT_3(A)  ((A) & 0x00000008)
  144. #define BIT_4(A)  ((A) & 0x00000010)
  145. #define BIT_5(A)  ((A) & 0x00000020)
  146. #define BIT_6(A)  ((A) & 0x00000040)
  147. #define BIT_7(A)  ((A) & 0x00000080)
  148. #define BIT_8(A)  ((A) & 0x00000100)
  149. #define BIT_9(A)  ((A) & 0x00000200)
  150. #define BIT_A(A)  ((A) & 0x00000400)
  151. #define BIT_B(A)  ((A) & 0x00000800)
  152. #define BIT_C(A)  ((A) & 0x00001000)
  153. #define BIT_D(A)  ((A) & 0x00002000)
  154. #define BIT_E(A)  ((A) & 0x00004000)
  155. #define BIT_F(A)  ((A) & 0x00008000)
  156. #define BIT_10(A) ((A) & 0x00010000)
  157. #define BIT_11(A) ((A) & 0x00020000)
  158. #define BIT_12(A) ((A) & 0x00040000)
  159. #define BIT_13(A) ((A) & 0x00080000)
  160. #define BIT_14(A) ((A) & 0x00100000)
  161. #define BIT_15(A) ((A) & 0x00200000)
  162. #define BIT_16(A) ((A) & 0x00400000)
  163. #define BIT_17(A) ((A) & 0x00800000)
  164. #define BIT_18(A) ((A) & 0x01000000)
  165. #define BIT_19(A) ((A) & 0x02000000)
  166. #define BIT_1A(A) ((A) & 0x04000000)
  167. #define BIT_1B(A) ((A) & 0x08000000)
  168. #define BIT_1C(A) ((A) & 0x10000000)
  169. #define BIT_1D(A) ((A) & 0x20000000)
  170. #define BIT_1E(A) ((A) & 0x40000000)
  171. #define BIT_1F(A) ((A) & 0x80000000)
  172.  
  173. /* Get the most significant bit for specific sizes */
  174. #define GET_MSB_8(A)  ((A) & 0x80)
  175. #define GET_MSB_9(A)  ((A) & 0x100)
  176. #define GET_MSB_16(A) ((A) & 0x8000)
  177. #define GET_MSB_17(A) ((A) & 0x10000)
  178. #define GET_MSB_32(A) ((A) & 0x80000000)
  179. #if M68K_USE_64_BIT
  180. #define GET_MSB_33(A) ((A) & 0x100000000)
  181. #endif /* M68K_USE_64_BIT */
  182.  
  183. /* Isolate nibbles */
  184. #define LOW_NIBBLE(A)  ((A) & 0x0f)
  185. #define HIGH_NIBBLE(A) ((A) & 0xf0)
  186.  
  187. /* These are used to isolate 8, 16, and 32 bit sizes */
  188. #define MASK_OUT_ABOVE_2(A)  ((A) & 3)
  189. #define MASK_OUT_ABOVE_8(A)  ((A) & 0xff)
  190. #define MASK_OUT_ABOVE_16(A) ((A) & 0xffff)
  191. #define MASK_OUT_BELOW_2(A)  ((A) & ~3)
  192. #define MASK_OUT_BELOW_8(A)  ((A) & ~0xff)
  193. #define MASK_OUT_BELOW_16(A) ((A) & ~0xffff)
  194.  
  195. /* No need to mask if we are 32 bit */
  196. #if M68K_INT_GT_32_BIT || M68K_USE_64_BIT
  197.         #define MASK_OUT_ABOVE_32(A) ((A) & 0xffffffff)
  198.         #define MASK_OUT_BELOW_32(A) ((A) & ~0xffffffff)
  199. #else
  200.         #define MASK_OUT_ABOVE_32(A) (A)
  201.         #define MASK_OUT_BELOW_32(A) 0
  202. #endif /* M68K_INT_GT_32_BIT || M68K_USE_64_BIT */
  203.  
  204. /* Simulate address lines of 68k family */
  205. #define ADDRESS_68K(A) ((A)&CPU_ADDRESS_MASK)
  206.  
  207.  
  208. /* Shift & Rotate Macros. */
  209. #define LSL(A, C) ((A) << (C))
  210. #define LSR(A, C) ((A) >> (C))
  211.  
  212. /* Some > 32-bit optimizations */
  213. #if M68K_INT_GT_32_BIT
  214.         /* Shift left and right */
  215.         #define LSR_32(A, C) ((A) >> (C))
  216.         #define LSL_32(A, C) ((A) << (C))
  217. #else
  218.         /* We have to do this because the morons at ANSI decided that shifts
  219.      * by >= data size are undefined.
  220.      */
  221.         #define LSR_32(A, C) ((C) < 32 ? (A) >> (C) : 0)
  222.         #define LSL_32(A, C) ((C) < 32 ? (A) << (C) : 0)
  223. #endif /* M68K_INT_GT_32_BIT */
  224.  
  225. #if M68K_USE_64_BIT
  226.         #define LSL_32_64(A, C) ((A) << (C))
  227.         #define LSR_32_64(A, C) ((A) >> (C))
  228.         #define ROL_33_64(A, C) (LSL_32_64(A, C) | LSR_32_64(A, 33-(C)))
  229.         #define ROR_33_64(A, C) (LSR_32_64(A, C) | LSL_32_64(A, 33-(C)))
  230. #endif /* M68K_USE_64_BIT */
  231.  
  232. #define ROL_8(A, C)      MASK_OUT_ABOVE_8(LSL(A, C) | LSR(A, 8-(C)))
  233. #define ROL_9(A, C)                      (LSL(A, C) | LSR(A, 9-(C)))
  234. #define ROL_16(A, C)    MASK_OUT_ABOVE_16(LSL(A, C) | LSR(A, 16-(C)))
  235. #define ROL_17(A, C)                     (LSL(A, C) | LSR(A, 17-(C)))
  236. #define ROL_32(A, C)    MASK_OUT_ABOVE_32(LSL_32(A, C) | LSR_32(A, 32-(C)))
  237. #define ROL_33(A, C)                     (LSL_32(A, C) | LSR_32(A, 33-(C)))
  238.  
  239. #define ROR_8(A, C)      MASK_OUT_ABOVE_8(LSR(A, C) | LSL(A, 8-(C)))
  240. #define ROR_9(A, C)                      (LSR(A, C) | LSL(A, 9-(C)))
  241. #define ROR_16(A, C)    MASK_OUT_ABOVE_16(LSR(A, C) | LSL(A, 16-(C)))
  242. #define ROR_17(A, C)                     (LSR(A, C) | LSL(A, 17-(C)))
  243. #define ROR_32(A, C)    MASK_OUT_ABOVE_32(LSR_32(A, C) | LSL_32(A, 32-(C)))
  244. #define ROR_33(A, C)                     (LSR_32(A, C) | LSL_32(A, 33-(C)))
  245.  
  246.  
  247.  
  248. /* ------------------------------ CPU Access ------------------------------ */
  249.  
  250. /* Access the CPU registers */
  251. #define CPU_TYPE         m68ki_cpu.cpu_type
  252.  
  253. #define REG_DA           m68ki_cpu.dar /* easy access to data and address regs */
  254. #define REG_D            m68ki_cpu.dar
  255. #define REG_A            (m68ki_cpu.dar+8)
  256. #define REG_PPC                  m68ki_cpu.ppc
  257. #define REG_PC           m68ki_cpu.pc
  258. #define REG_SP_BASE      m68ki_cpu.sp
  259. #define REG_USP          m68ki_cpu.sp[0]
  260. #define REG_ISP          m68ki_cpu.sp[4]
  261. #define REG_MSP          m68ki_cpu.sp[6]
  262. #define REG_SP           m68ki_cpu.dar[15]
  263. #define REG_VBR          m68ki_cpu.vbr
  264. #define REG_SFC          m68ki_cpu.sfc
  265. #define REG_DFC          m68ki_cpu.dfc
  266. #define REG_CACR         m68ki_cpu.cacr
  267. #define REG_CAAR         m68ki_cpu.caar
  268. #define REG_IR           m68ki_cpu.ir
  269.  
  270. #define REG_FP           m68ki_cpu.fpr
  271. #define REG_FPCR         m68ki_cpu.fpcr
  272. #define REG_FPSR         m68ki_cpu.fpsr
  273. #define REG_FPIAR        m68ki_cpu.fpiar
  274.  
  275. #define FLAG_T1          m68ki_cpu.t1_flag
  276. #define FLAG_T0          m68ki_cpu.t0_flag
  277. #define FLAG_S           m68ki_cpu.s_flag
  278. #define FLAG_M           m68ki_cpu.m_flag
  279. #define FLAG_X           m68ki_cpu.x_flag
  280. #define FLAG_N           m68ki_cpu.n_flag
  281. #define FLAG_Z           m68ki_cpu.not_z_flag
  282. #define FLAG_V           m68ki_cpu.v_flag
  283. #define FLAG_C           m68ki_cpu.c_flag
  284. #define FLAG_INT_MASK    m68ki_cpu.int_mask
  285.  
  286. #define CPU_INT_LEVEL    m68ki_cpu.int_level /* ASG: changed from CPU_INTS_PENDING */
  287. #define CPU_INT_CYCLES   m68ki_cpu.int_cycles /* ASG */
  288. #define CPU_STOPPED      m68ki_cpu.stopped
  289. #define CPU_PREF_ADDR    m68ki_cpu.pref_addr
  290. #define CPU_PREF_DATA    m68ki_cpu.pref_data
  291. #define CPU_ADDRESS_MASK m68ki_cpu.address_mask
  292. #define CPU_SR_MASK      m68ki_cpu.sr_mask
  293. #define CPU_INSTR_MODE   m68ki_cpu.instr_mode
  294. #define CPU_RUN_MODE     m68ki_cpu.run_mode
  295.  
  296. #define CYC_INSTRUCTION  m68ki_cpu.cyc_instruction
  297. #define CYC_EXCEPTION    m68ki_cpu.cyc_exception
  298. #define CYC_BCC_NOTAKE_B m68ki_cpu.cyc_bcc_notake_b
  299. #define CYC_BCC_NOTAKE_W m68ki_cpu.cyc_bcc_notake_w
  300. #define CYC_DBCC_F_NOEXP m68ki_cpu.cyc_dbcc_f_noexp
  301. #define CYC_DBCC_F_EXP   m68ki_cpu.cyc_dbcc_f_exp
  302. #define CYC_SCC_R_TRUE   m68ki_cpu.cyc_scc_r_true
  303. #define CYC_MOVEM_W      m68ki_cpu.cyc_movem_w
  304. #define CYC_MOVEM_L      m68ki_cpu.cyc_movem_l
  305. #define CYC_SHIFT        m68ki_cpu.cyc_shift
  306. #define CYC_RESET        m68ki_cpu.cyc_reset
  307.  
  308.  
  309. #define CALLBACK_INT_ACK      m68ki_cpu.int_ack_callback
  310. #define CALLBACK_BKPT_ACK     m68ki_cpu.bkpt_ack_callback
  311. #define CALLBACK_RESET_INSTR  m68ki_cpu.reset_instr_callback
  312. #define CALLBACK_CMPILD_INSTR m68ki_cpu.cmpild_instr_callback
  313. #define CALLBACK_RTE_INSTR    m68ki_cpu.rte_instr_callback
  314. #define CALLBACK_TAS_INSTR    m68ki_cpu.tas_instr_callback
  315. #define CALLBACK_PC_CHANGED   m68ki_cpu.pc_changed_callback
  316. #define CALLBACK_SET_FC       m68ki_cpu.set_fc_callback
  317. #define CALLBACK_INSTR_HOOK   m68ki_cpu.instr_hook_callback
  318.  
  319.  
  320.  
  321. /* ----------------------------- Configuration ---------------------------- */
  322.  
  323. /* These defines are dependant on the configuration defines in m68kconf.h */
  324.  
  325. /* Disable certain comparisons if we're not using all CPU types */
  326. #if M68K_EMULATE_040
  327.         #define CPU_TYPE_IS_040_PLUS(A)    ((A) & CPU_TYPE_040)
  328.         #define CPU_TYPE_IS_040_LESS(A)    1
  329. #else
  330.         #define CPU_TYPE_IS_040_PLUS(A)    0
  331.         #define CPU_TYPE_IS_040_LESS(A)    1
  332. #endif
  333.  
  334. #if M68K_EMULATE_020
  335.         #define CPU_TYPE_IS_020_PLUS(A)    ((A) & (CPU_TYPE_020 | CPU_TYPE_040))
  336.         #define CPU_TYPE_IS_020_LESS(A)    1
  337. #else
  338.         #define CPU_TYPE_IS_020_PLUS(A)    0
  339.         #define CPU_TYPE_IS_020_LESS(A)    1
  340. #endif
  341.  
  342. #if M68K_EMULATE_EC020
  343.         #define CPU_TYPE_IS_EC020_PLUS(A)  ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020 | CPU_TYPE_040))
  344.         #define CPU_TYPE_IS_EC020_LESS(A)  ((A) & (CPU_TYPE_000 | CPU_TYPE_008 | CPU_TYPE_010 | CPU_TYPE_EC020))
  345. #else
  346.         #define CPU_TYPE_IS_EC020_PLUS(A)  CPU_TYPE_IS_020_PLUS(A)
  347.         #define CPU_TYPE_IS_EC020_LESS(A)  CPU_TYPE_IS_020_LESS(A)
  348. #endif
  349.  
  350. #if M68K_EMULATE_010
  351.         #define CPU_TYPE_IS_010(A)         ((A) == CPU_TYPE_010)
  352.         #define CPU_TYPE_IS_010_PLUS(A)    ((A) & (CPU_TYPE_010 | CPU_TYPE_EC020 | CPU_TYPE_020 | CPU_TYPE_040))
  353.         #define CPU_TYPE_IS_010_LESS(A)    ((A) & (CPU_TYPE_000 | CPU_TYPE_008 | CPU_TYPE_010))
  354. #else
  355.         #define CPU_TYPE_IS_010(A)         0
  356.         #define CPU_TYPE_IS_010_PLUS(A)    CPU_TYPE_IS_EC020_PLUS(A)
  357.         #define CPU_TYPE_IS_010_LESS(A)    CPU_TYPE_IS_EC020_LESS(A)
  358. #endif
  359.  
  360. #if M68K_EMULATE_020 || M68K_EMULATE_EC020
  361.         #define CPU_TYPE_IS_020_VARIANT(A) ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020))
  362. #else
  363.         #define CPU_TYPE_IS_020_VARIANT(A) 0
  364. #endif
  365.  
  366. #if M68K_EMULATE_040 || M68K_EMULATE_020 || M68K_EMULATE_EC020 || M68K_EMULATE_010
  367.         #define CPU_TYPE_IS_000(A)         ((A) == CPU_TYPE_000 || (A) == CPU_TYPE_008)
  368. #else
  369.         #define CPU_TYPE_IS_000(A)         1
  370. #endif
  371.  
  372.  
  373. #if !M68K_SEPARATE_READS
  374. #define m68k_read_immediate_16(A) m68ki_read_program_16(A)
  375. #define m68k_read_immediate_32(A) m68ki_read_program_32(A)
  376.  
  377. #define m68k_read_pcrelative_8(A) m68ki_read_program_8(A)
  378. #define m68k_read_pcrelative_16(A) m68ki_read_program_16(A)
  379. #define m68k_read_pcrelative_32(A) m68ki_read_program_32(A)
  380. #endif /* M68K_SEPARATE_READS */
  381.  
  382.  
  383. /* Enable or disable callback functions */
  384. #if M68K_EMULATE_INT_ACK
  385.         #if M68K_EMULATE_INT_ACK == OPT_SPECIFY_HANDLER
  386.                 #define m68ki_int_ack(A) M68K_INT_ACK_CALLBACK(A)
  387.         #else
  388.                 #define m68ki_int_ack(A) CALLBACK_INT_ACK(A)
  389.         #endif
  390. #else
  391.         /* Default action is to used autovector mode, which is most common */
  392.         #define m68ki_int_ack(A) M68K_INT_ACK_AUTOVECTOR
  393. #endif /* M68K_EMULATE_INT_ACK */
  394.  
  395. #if M68K_EMULATE_BKPT_ACK
  396.         #if M68K_EMULATE_BKPT_ACK == OPT_SPECIFY_HANDLER
  397.                 #define m68ki_bkpt_ack(A) M68K_BKPT_ACK_CALLBACK(A)
  398.         #else
  399.                 #define m68ki_bkpt_ack(A) CALLBACK_BKPT_ACK(A)
  400.         #endif
  401. #else
  402.         #define m68ki_bkpt_ack(A)
  403. #endif /* M68K_EMULATE_BKPT_ACK */
  404.  
  405. #if M68K_EMULATE_RESET
  406.         #if M68K_EMULATE_RESET == OPT_SPECIFY_HANDLER
  407.                 #define m68ki_output_reset() M68K_RESET_CALLBACK()
  408.         #else
  409.                 #define m68ki_output_reset() CALLBACK_RESET_INSTR()
  410.         #endif
  411. #else
  412.         #define m68ki_output_reset()
  413. #endif /* M68K_EMULATE_RESET */
  414.  
  415. #if M68K_CMPILD_HAS_CALLBACK
  416.         #if M68K_CMPILD_HAS_CALLBACK == OPT_SPECIFY_HANDLER
  417.                 #define m68ki_cmpild_callback(v,r) M68K_CMPILD_CALLBACK(v,r)
  418.         #else
  419.                 #define m68ki_cmpild_callback(v,r) CALLBACK_CMPILD_INSTR(v,r)
  420.         #endif
  421. #else
  422.         #define m68ki_cmpild_callback(v,r)
  423. #endif /* M68K_CMPILD_HAS_CALLBACK */
  424.  
  425. #if M68K_RTE_HAS_CALLBACK
  426.         #if M68K_RTE_HAS_CALLBACK == OPT_SPECIFY_HANDLER
  427.                 #define m68ki_rte_callback() M68K_RTE_CALLBACK()
  428.         #else
  429.                 #define m68ki_rte_callback() CALLBACK_RTE_INSTR()
  430.         #endif
  431. #else
  432.         #define m68ki_rte_callback()
  433. #endif /* M68K_RTE_HAS_CALLBACK */
  434.  
  435. #if M68K_TAS_HAS_CALLBACK
  436.         #if M68K_TAS_HAS_CALLBACK == OPT_SPECIFY_HANDLER
  437.                 #define m68ki_tas_callback() M68K_TAS_CALLBACK()
  438.         #else
  439.                 #define m68ki_tas_callback() CALLBACK_TAS_INSTR()
  440.         #endif
  441. #else
  442.         #define m68ki_tas_callback() 0
  443. #endif /* M68K_TAS_HAS_CALLBACK */
  444.  
  445.  
  446. #if M68K_INSTRUCTION_HOOK
  447.         #if M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER
  448.                 #define m68ki_instr_hook() M68K_INSTRUCTION_CALLBACK()
  449.         #else
  450.                 #define m68ki_instr_hook() CALLBACK_INSTR_HOOK()
  451.         #endif
  452. #else
  453.         #define m68ki_instr_hook()
  454. #endif /* M68K_INSTRUCTION_HOOK */
  455.  
  456. #if M68K_MONITOR_PC
  457.         #if M68K_MONITOR_PC == OPT_SPECIFY_HANDLER
  458.                 #define m68ki_pc_changed(A) M68K_SET_PC_CALLBACK(ADDRESS_68K(A))
  459.         #else
  460.                 #define m68ki_pc_changed(A) CALLBACK_PC_CHANGED(ADDRESS_68K(A))
  461.         #endif
  462. #else
  463.         #define m68ki_pc_changed(A)
  464. #endif /* M68K_MONITOR_PC */
  465.  
  466.  
  467. /* Enable or disable function code emulation */
  468. #if M68K_EMULATE_FC
  469.         #if M68K_EMULATE_FC == OPT_SPECIFY_HANDLER
  470.                 #define m68ki_set_fc(A) M68K_SET_FC_CALLBACK(A)
  471.         #else
  472.                 #define m68ki_set_fc(A) CALLBACK_SET_FC(A)
  473.         #endif
  474.         #define m68ki_use_data_space() m68ki_address_space = FUNCTION_CODE_USER_DATA
  475.         #define m68ki_use_program_space() m68ki_address_space = FUNCTION_CODE_USER_PROGRAM
  476.         #define m68ki_get_address_space() m68ki_address_space
  477. #else
  478.         #define m68ki_set_fc(A) (void)(A)
  479.         #define m68ki_use_data_space()
  480.         #define m68ki_use_program_space()
  481.         #define m68ki_get_address_space() FUNCTION_CODE_USER_DATA
  482. #endif /* M68K_EMULATE_FC */
  483.  
  484.  
  485. /* Enable or disable trace emulation */
  486. #if M68K_EMULATE_TRACE
  487.         /* Initiates trace checking before each instruction (t1) */
  488.         #define m68ki_trace_t1() m68ki_tracing = FLAG_T1
  489.         /* adds t0 to trace checking if we encounter change of flow */
  490.         #define m68ki_trace_t0() m68ki_tracing |= FLAG_T0
  491.         /* Clear all tracing */
  492.         #define m68ki_clear_trace() m68ki_tracing = 0
  493.         /* Cause a trace exception if we are tracing */
  494.         #define m68ki_exception_if_trace() if(m68ki_tracing) m68ki_exception_trace()
  495. #else
  496.         #define m68ki_trace_t1()
  497.         #define m68ki_trace_t0()
  498.         #define m68ki_clear_trace()
  499.         #define m68ki_exception_if_trace()
  500. #endif /* M68K_EMULATE_TRACE */
  501.  
  502.  
  503.  
  504. /* Address error */
  505. #if M68K_EMULATE_ADDRESS_ERROR
  506.         #include <setjmp.h>
  507.         extern jmp_buf m68ki_aerr_trap;
  508.  
  509.         #define m68ki_set_address_error_trap() \
  510.                 if(setjmp(m68ki_aerr_trap) != 0) \
  511.                 { \
  512.                         m68ki_exception_address_error(); \
  513.                         if(CPU_STOPPED) \
  514.                         { \
  515.                                 SET_CYCLES(0); \
  516.                                 CPU_INT_CYCLES = 0; \
  517.                                 return m68ki_initial_cycles; \
  518.                         } \
  519.                 }
  520.  
  521.         #define m68ki_check_address_error(ADDR, WRITE_MODE, FC) \
  522.                 if((ADDR)&1) \
  523.                 { \
  524.                         m68ki_aerr_address = ADDR; \
  525.                         m68ki_aerr_write_mode = WRITE_MODE; \
  526.                         m68ki_aerr_fc = FC; \
  527.                         longjmp(m68ki_aerr_trap, 1); \
  528.                 }
  529.  
  530.         #define m68ki_check_address_error_010_less(ADDR, WRITE_MODE, FC) \
  531.                 if (CPU_TYPE_IS_010_LESS(CPU_TYPE)) \
  532.                 { \
  533.                         m68ki_check_address_error(ADDR, WRITE_MODE, FC) \
  534.                 }
  535. #else
  536.         #define m68ki_set_address_error_trap()
  537.         #define m68ki_check_address_error(ADDR, WRITE_MODE, FC)
  538.         #define m68ki_check_address_error_010_less(ADDR, WRITE_MODE, FC)
  539. #endif /* M68K_ADDRESS_ERROR */
  540.  
  541. /* Logging */
  542. #if M68K_LOG_ENABLE
  543.         #include <stdio.h>
  544.         extern FILE* M68K_LOG_FILEHANDLE
  545.         extern char* m68ki_cpu_names[];
  546.  
  547.         #define M68K_DO_LOG(A) if(M68K_LOG_FILEHANDLE) fprintf A
  548.         #if M68K_LOG_1010_1111
  549.                 #define M68K_DO_LOG_EMU(A) if(M68K_LOG_FILEHANDLE) fprintf A
  550.         #else
  551.                 #define M68K_DO_LOG_EMU(A)
  552.         #endif
  553. #else
  554.         #define M68K_DO_LOG(A)
  555.         #define M68K_DO_LOG_EMU(A)
  556. #endif
  557.  
  558.  
  559.  
  560. /* -------------------------- EA / Operand Access ------------------------- */
  561.  
  562. /*
  563.  * The general instruction format follows this pattern:
  564.  * .... XXX. .... .YYY
  565.  * where XXX is register X and YYY is register Y
  566.  */
  567. /* Data Register Isolation */
  568. #define DX (REG_D[(REG_IR >> 9) & 7])
  569. #define DY (REG_D[REG_IR & 7])
  570. /* Address Register Isolation */
  571. #define AX (REG_A[(REG_IR >> 9) & 7])
  572. #define AY (REG_A[REG_IR & 7])
  573.  
  574.  
  575. /* Effective Address Calculations */
  576. #define EA_AY_AI_8()   AY                                    /* address register indirect */
  577. #define EA_AY_AI_16()  EA_AY_AI_8()
  578. #define EA_AY_AI_32()  EA_AY_AI_8()
  579. #define EA_AY_PI_8()   (AY++)                                /* postincrement (size = byte) */
  580. #define EA_AY_PI_16()  ((AY+=2)-2)                           /* postincrement (size = word) */
  581. #define EA_AY_PI_32()  ((AY+=4)-4)                           /* postincrement (size = long) */
  582. #define EA_AY_PD_8()   (--AY)                                /* predecrement (size = byte) */
  583. #define EA_AY_PD_16()  (AY-=2)                               /* predecrement (size = word) */
  584. #define EA_AY_PD_32()  (AY-=4)                               /* predecrement (size = long) */
  585. #define EA_AY_DI_8()   (AY+MAKE_INT_16(m68ki_read_imm_16())) /* displacement */
  586. #define EA_AY_DI_16()  EA_AY_DI_8()
  587. #define EA_AY_DI_32()  EA_AY_DI_8()
  588. #define EA_AY_IX_8()   m68ki_get_ea_ix(AY)                   /* indirect + index */
  589. #define EA_AY_IX_16()  EA_AY_IX_8()
  590. #define EA_AY_IX_32()  EA_AY_IX_8()
  591.  
  592. #define EA_AX_AI_8()   AX
  593. #define EA_AX_AI_16()  EA_AX_AI_8()
  594. #define EA_AX_AI_32()  EA_AX_AI_8()
  595. #define EA_AX_PI_8()   (AX++)
  596. #define EA_AX_PI_16()  ((AX+=2)-2)
  597. #define EA_AX_PI_32()  ((AX+=4)-4)
  598. #define EA_AX_PD_8()   (--AX)
  599. #define EA_AX_PD_16()  (AX-=2)
  600. #define EA_AX_PD_32()  (AX-=4)
  601. #define EA_AX_DI_8()   (AX+MAKE_INT_16(m68ki_read_imm_16()))
  602. #define EA_AX_DI_16()  EA_AX_DI_8()
  603. #define EA_AX_DI_32()  EA_AX_DI_8()
  604. #define EA_AX_IX_8()   m68ki_get_ea_ix(AX)
  605. #define EA_AX_IX_16()  EA_AX_IX_8()
  606. #define EA_AX_IX_32()  EA_AX_IX_8()
  607.  
  608. #define EA_A7_PI_8()   ((REG_A[7]+=2)-2)
  609. #define EA_A7_PD_8()   (REG_A[7]-=2)
  610.  
  611. #define EA_AW_8()      MAKE_INT_16(m68ki_read_imm_16())      /* absolute word */
  612. #define EA_AW_16()     EA_AW_8()
  613. #define EA_AW_32()     EA_AW_8()
  614. #define EA_AL_8()      m68ki_read_imm_32()                   /* absolute long */
  615. #define EA_AL_16()     EA_AL_8()
  616. #define EA_AL_32()     EA_AL_8()
  617. #define EA_PCDI_8()    m68ki_get_ea_pcdi()                   /* pc indirect + displacement */
  618. #define EA_PCDI_16()   EA_PCDI_8()
  619. #define EA_PCDI_32()   EA_PCDI_8()
  620. #define EA_PCIX_8()    m68ki_get_ea_pcix()                   /* pc indirect + index */
  621. #define EA_PCIX_16()   EA_PCIX_8()
  622. #define EA_PCIX_32()   EA_PCIX_8()
  623.  
  624.  
  625. #define OPER_I_8()     m68ki_read_imm_8()
  626. #define OPER_I_16()    m68ki_read_imm_16()
  627. #define OPER_I_32()    m68ki_read_imm_32()
  628.  
  629.  
  630.  
  631. /* --------------------------- Status Register ---------------------------- */
  632.  
  633. /* Flag Calculation Macros */
  634. #define CFLAG_8(A) (A)
  635. #define CFLAG_16(A) ((A)>>8)
  636.  
  637. #if M68K_INT_GT_32_BIT
  638.         #define CFLAG_ADD_32(S, D, R) ((R)>>24)
  639.         #define CFLAG_SUB_32(S, D, R) ((R)>>24)
  640. #else
  641.         #define CFLAG_ADD_32(S, D, R) (((S & D) | (~R & (S | D)))>>23)
  642.         #define CFLAG_SUB_32(S, D, R) (((S & R) | (~D & (S | R)))>>23)
  643. #endif /* M68K_INT_GT_32_BIT */
  644.  
  645. #define VFLAG_ADD_8(S, D, R) ((S^R) & (D^R))
  646. #define VFLAG_ADD_16(S, D, R) (((S^R) & (D^R))>>8)
  647. #define VFLAG_ADD_32(S, D, R) (((S^R) & (D^R))>>24)
  648.  
  649. #define VFLAG_SUB_8(S, D, R) ((S^D) & (R^D))
  650. #define VFLAG_SUB_16(S, D, R) (((S^D) & (R^D))>>8)
  651. #define VFLAG_SUB_32(S, D, R) (((S^D) & (R^D))>>24)
  652.  
  653. #define NFLAG_8(A) (A)
  654. #define NFLAG_16(A) ((A)>>8)
  655. #define NFLAG_32(A) ((A)>>24)
  656. #define NFLAG_64(A) ((A)>>56)
  657.  
  658. #define ZFLAG_8(A) MASK_OUT_ABOVE_8(A)
  659. #define ZFLAG_16(A) MASK_OUT_ABOVE_16(A)
  660. #define ZFLAG_32(A) MASK_OUT_ABOVE_32(A)
  661.  
  662.  
  663. /* Flag values */
  664. #define NFLAG_SET   0x80
  665. #define NFLAG_CLEAR 0
  666. #define CFLAG_SET   0x100
  667. #define CFLAG_CLEAR 0
  668. #define XFLAG_SET   0x100
  669. #define XFLAG_CLEAR 0
  670. #define VFLAG_SET   0x80
  671. #define VFLAG_CLEAR 0
  672. #define ZFLAG_SET   0
  673. #define ZFLAG_CLEAR 0xffffffff
  674.  
  675. #define SFLAG_SET   4
  676. #define SFLAG_CLEAR 0
  677. #define MFLAG_SET   2
  678. #define MFLAG_CLEAR 0
  679.  
  680. /* Turn flag values into 1 or 0 */
  681. #define XFLAG_AS_1() ((FLAG_X>>8)&1)
  682. #define NFLAG_AS_1() ((FLAG_N>>7)&1)
  683. #define VFLAG_AS_1() ((FLAG_V>>7)&1)
  684. #define ZFLAG_AS_1() (!FLAG_Z)
  685. #define CFLAG_AS_1() ((FLAG_C>>8)&1)
  686.  
  687.  
  688. /* Conditions */
  689. #define COND_CS() (FLAG_C&0x100)
  690. #define COND_CC() (!COND_CS())
  691. #define COND_VS() (FLAG_V&0x80)
  692. #define COND_VC() (!COND_VS())
  693. #define COND_NE() FLAG_Z
  694. #define COND_EQ() (!COND_NE())
  695. #define COND_MI() (FLAG_N&0x80)
  696. #define COND_PL() (!COND_MI())
  697. #define COND_LT() ((FLAG_N^FLAG_V)&0x80)
  698. #define COND_GE() (!COND_LT())
  699. #define COND_HI() (COND_CC() && COND_NE())
  700. #define COND_LS() (COND_CS() || COND_EQ())
  701. #define COND_GT() (COND_GE() && COND_NE())
  702. #define COND_LE() (COND_LT() || COND_EQ())
  703.  
  704. /* Reversed conditions */
  705. #define COND_NOT_CS() COND_CC()
  706. #define COND_NOT_CC() COND_CS()
  707. #define COND_NOT_VS() COND_VC()
  708. #define COND_NOT_VC() COND_VS()
  709. #define COND_NOT_NE() COND_EQ()
  710. #define COND_NOT_EQ() COND_NE()
  711. #define COND_NOT_MI() COND_PL()
  712. #define COND_NOT_PL() COND_MI()
  713. #define COND_NOT_LT() COND_GE()
  714. #define COND_NOT_GE() COND_LT()
  715. #define COND_NOT_HI() COND_LS()
  716. #define COND_NOT_LS() COND_HI()
  717. #define COND_NOT_GT() COND_LE()
  718. #define COND_NOT_LE() COND_GT()
  719.  
  720. /* Not real conditions, but here for convenience */
  721. #define COND_XS() (FLAG_X&0x100)
  722. #define COND_XC() (!COND_XS)
  723.  
  724.  
  725. /* Get the condition code register */
  726. #define m68ki_get_ccr() ((COND_XS() >> 4) | \
  727.                                                  (COND_MI() >> 4) | \
  728.                                                  (COND_EQ() << 2) | \
  729.                                                  (COND_VS() >> 6) | \
  730.                                                  (COND_CS() >> 8))
  731.  
  732. /* Get the status register */
  733. #define m68ki_get_sr() ( FLAG_T1              | \
  734.                                                  FLAG_T0              | \
  735.                                                 (FLAG_S        << 11) | \
  736.                                                 (FLAG_M        << 11) | \
  737.                                                  FLAG_INT_MASK        | \
  738.                                                  m68ki_get_ccr())
  739.  
  740.  
  741.  
  742. /* ---------------------------- Cycle Counting ---------------------------- */
  743.  
  744. #define ADD_CYCLES(A)    m68ki_remaining_cycles += (A)
  745. #define USE_CYCLES(A)    m68ki_remaining_cycles -= (A)
  746. #define SET_CYCLES(A)    m68ki_remaining_cycles = A
  747. #define GET_CYCLES()     m68ki_remaining_cycles
  748. #define USE_ALL_CYCLES() m68ki_remaining_cycles = 0
  749.  
  750.  
  751.  
  752. /* ----------------------------- Read / Write ----------------------------- */
  753.  
  754. /* Read from the current address space */
  755. #define m68ki_read_8(A)  m68ki_read_8_fc (A, FLAG_S | m68ki_get_address_space())
  756. #define m68ki_read_16(A) m68ki_read_16_fc(A, FLAG_S | m68ki_get_address_space())
  757. #define m68ki_read_32(A) m68ki_read_32_fc(A, FLAG_S | m68ki_get_address_space())
  758.  
  759. /* Write to the current data space */
  760. #define m68ki_write_8(A, V)  m68ki_write_8_fc (A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
  761. #define m68ki_write_16(A, V) m68ki_write_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
  762. #define m68ki_write_32(A, V) m68ki_write_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
  763.  
  764. #if M68K_SIMULATE_PD_WRITES
  765. #define m68ki_write_32_pd(A, V) m68ki_write_32_pd_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
  766. #else
  767. #define m68ki_write_32_pd(A, V) m68ki_write_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
  768. #endif
  769.  
  770. /* map read immediate 8 to read immediate 16 */
  771. #define m68ki_read_imm_8() MASK_OUT_ABOVE_8(m68ki_read_imm_16())
  772.  
  773. /* Map PC-relative reads */
  774. #define m68ki_read_pcrel_8(A) m68k_read_pcrelative_8(A)
  775. #define m68ki_read_pcrel_16(A) m68k_read_pcrelative_16(A)
  776. #define m68ki_read_pcrel_32(A) m68k_read_pcrelative_32(A)
  777.  
  778. /* Read from the program space */
  779. #define m68ki_read_program_8(A)         m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)
  780. #define m68ki_read_program_16(A)        m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)
  781. #define m68ki_read_program_32(A)        m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)
  782.  
  783. /* Read from the data space */
  784. #define m68ki_read_data_8(A)    m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)
  785. #define m68ki_read_data_16(A)   m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)
  786. #define m68ki_read_data_32(A)   m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)
  787.  
  788.  
  789.  
  790. /* ======================================================================== */
  791. /* =============================== PROTOTYPES ============================= */
  792. /* ======================================================================== */
  793.  
  794. typedef union
  795. {
  796.         UINT64 i;
  797.         double f;
  798. } fp_reg;
  799.  
  800. typedef struct
  801. {
  802.         uint cpu_type;     /* CPU Type: 68000, 68008, 68010, 68EC020, or 68020 */
  803.         uint dar[16];      /* Data and Address Registers */
  804.         uint ppc;                  /* Previous program counter */
  805.         uint pc;           /* Program Counter */
  806.         uint sp[7];        /* User, Interrupt, and Master Stack Pointers */
  807.         uint vbr;          /* Vector Base Register (m68010+) */
  808.         uint sfc;          /* Source Function Code Register (m68010+) */
  809.         uint dfc;          /* Destination Function Code Register (m68010+) */
  810.         uint cacr;         /* Cache Control Register (m68020, unemulated) */
  811.         uint caar;         /* Cache Address Register (m68020, unemulated) */
  812.         uint ir;           /* Instruction Register */
  813.     fp_reg fpr[8];     /* FPU Data Register (m68040) */
  814.         uint fpiar;        /* FPU Instruction Address Register (m68040) */
  815.         uint fpsr;         /* FPU Status Register (m68040) */
  816.         uint fpcr;         /* FPU Control Register (m68040) */
  817.         uint t1_flag;      /* Trace 1 */
  818.         uint t0_flag;      /* Trace 0 */
  819.         uint s_flag;       /* Supervisor */
  820.         uint m_flag;       /* Master/Interrupt state */
  821.         uint x_flag;       /* Extend */
  822.         uint n_flag;       /* Negative */
  823.         uint not_z_flag;   /* Zero, inverted for speedups */
  824.         uint v_flag;       /* Overflow */
  825.         uint c_flag;       /* Carry */
  826.         uint int_mask;     /* I0-I2 */
  827.         uint int_level;    /* State of interrupt pins IPL0-IPL2 -- ASG: changed from ints_pending */
  828.         uint int_cycles;   /* ASG: extra cycles from generated interrupts */
  829.         uint stopped;      /* Stopped state */
  830.         uint pref_addr;    /* Last prefetch address */
  831.         uint pref_data;    /* Data in the prefetch queue */
  832.         uint address_mask; /* Available address pins */
  833.         uint sr_mask;      /* Implemented status register bits */
  834.         uint instr_mode;   /* Stores whether we are in instruction mode or group 0/1 exception mode */
  835.         uint run_mode;     /* Stores whether we are processing a reset, bus error, address error, or something else */
  836.  
  837.         /* Clocks required for instructions / exceptions */
  838.         uint cyc_bcc_notake_b;
  839.         uint cyc_bcc_notake_w;
  840.         uint cyc_dbcc_f_noexp;
  841.         uint cyc_dbcc_f_exp;
  842.         uint cyc_scc_r_true;
  843.         uint cyc_movem_w;
  844.         uint cyc_movem_l;
  845.         uint cyc_shift;
  846.         uint cyc_reset;
  847.         uint8* cyc_instruction;
  848.         uint8* cyc_exception;
  849.  
  850.         /* Memory regions if defined */
  851.         m68k_mem_t (*mem)[];
  852.         unsigned int mem_len;
  853.  
  854.         /* Callbacks to host */
  855.         int  (*int_ack_callback)(int int_line);           /* Interrupt Acknowledge */
  856.         void (*bkpt_ack_callback)(unsigned int data);     /* Breakpoint Acknowledge */
  857.         void (*reset_instr_callback)(void);               /* Called when a RESET instruction is encountered */
  858.         void (*cmpild_instr_callback)(unsigned int, int); /* Called when a CMPI.L #v, Dn instruction is encountered */
  859.         void (*rte_instr_callback)(void);                 /* Called when a RTE instruction is encountered */
  860.         int  (*tas_instr_callback)(void);                 /* Called when a TAS instruction is encountered, allows / disallows writeback */
  861.         void (*pc_changed_callback)(unsigned int new_pc); /* Called when the PC changes by a large amount */
  862.         void (*set_fc_callback)(unsigned int new_fc);     /* Called when the CPU function code changes */
  863.         int (*instr_hook_callback)(void);                 /* Called every instruction cycle prior to execution */
  864.  
  865. } m68ki_cpu_core;
  866.  
  867.  
  868. extern m68ki_cpu_core m68ki_cpu;
  869. extern sint           m68ki_remaining_cycles;
  870. extern uint           m68ki_tracing;
  871. extern uint8          m68ki_shift_8_table[];
  872. extern uint16         m68ki_shift_16_table[];
  873. extern uint           m68ki_shift_32_table[];
  874. extern uint8          m68ki_exception_cycle_table[][256];
  875. extern uint           m68ki_address_space;
  876. extern uint8          m68ki_ea_idx_cycle_table[];
  877.  
  878. extern uint           m68ki_aerr_address;
  879. extern uint           m68ki_aerr_write_mode;
  880. extern uint           m68ki_aerr_fc;
  881.  
  882. /* Read data immediately after the program counter */
  883. INLINE uint m68ki_read_imm_16(void);
  884. INLINE uint m68ki_read_imm_32(void);
  885.  
  886. /* Read data with specific function code */
  887. INLINE uint m68ki_read_8_fc  (uint address, uint fc);
  888. INLINE uint m68ki_read_16_fc (uint address, uint fc);
  889. INLINE uint m68ki_read_32_fc (uint address, uint fc);
  890.  
  891. /* Write data with specific function code */
  892. INLINE void m68ki_write_8_fc (uint address, uint fc, uint value);
  893. INLINE void m68ki_write_16_fc(uint address, uint fc, uint value);
  894. INLINE void m68ki_write_32_fc(uint address, uint fc, uint value);
  895. #if M68K_SIMULATE_PD_WRITES
  896. INLINE void m68ki_write_32_pd_fc(uint address, uint fc, uint value);
  897. #endif /* M68K_SIMULATE_PD_WRITES */
  898.  
  899. /* Indexed and PC-relative ea fetching */
  900. INLINE uint m68ki_get_ea_pcdi(void);
  901. INLINE uint m68ki_get_ea_pcix(void);
  902. INLINE uint m68ki_get_ea_ix(uint An);
  903.  
  904. /* Operand fetching */
  905. INLINE uint OPER_AY_AI_8(void);
  906. INLINE uint OPER_AY_AI_16(void);
  907. INLINE uint OPER_AY_AI_32(void);
  908. INLINE uint OPER_AY_PI_8(void);
  909. INLINE uint OPER_AY_PI_16(void);
  910. INLINE uint OPER_AY_PI_32(void);
  911. INLINE uint OPER_AY_PD_8(void);
  912. INLINE uint OPER_AY_PD_16(void);
  913. INLINE uint OPER_AY_PD_32(void);
  914. INLINE uint OPER_AY_DI_8(void);
  915. INLINE uint OPER_AY_DI_16(void);
  916. INLINE uint OPER_AY_DI_32(void);
  917. INLINE uint OPER_AY_IX_8(void);
  918. INLINE uint OPER_AY_IX_16(void);
  919. INLINE uint OPER_AY_IX_32(void);
  920.  
  921. INLINE uint OPER_AX_AI_8(void);
  922. INLINE uint OPER_AX_AI_16(void);
  923. INLINE uint OPER_AX_AI_32(void);
  924. INLINE uint OPER_AX_PI_8(void);
  925. INLINE uint OPER_AX_PI_16(void);
  926. INLINE uint OPER_AX_PI_32(void);
  927. INLINE uint OPER_AX_PD_8(void);
  928. INLINE uint OPER_AX_PD_16(void);
  929. INLINE uint OPER_AX_PD_32(void);
  930. INLINE uint OPER_AX_DI_8(void);
  931. INLINE uint OPER_AX_DI_16(void);
  932. INLINE uint OPER_AX_DI_32(void);
  933. INLINE uint OPER_AX_IX_8(void);
  934. INLINE uint OPER_AX_IX_16(void);
  935. INLINE uint OPER_AX_IX_32(void);
  936.  
  937. INLINE uint OPER_A7_PI_8(void);
  938. INLINE uint OPER_A7_PD_8(void);
  939.  
  940. INLINE uint OPER_AW_8(void);
  941. INLINE uint OPER_AW_16(void);
  942. INLINE uint OPER_AW_32(void);
  943. INLINE uint OPER_AL_8(void);
  944. INLINE uint OPER_AL_16(void);
  945. INLINE uint OPER_AL_32(void);
  946. INLINE uint OPER_PCDI_8(void);
  947. INLINE uint OPER_PCDI_16(void);
  948. INLINE uint OPER_PCDI_32(void);
  949. INLINE uint OPER_PCIX_8(void);
  950. INLINE uint OPER_PCIX_16(void);
  951. INLINE uint OPER_PCIX_32(void);
  952.  
  953. /* Stack operations */
  954. INLINE void m68ki_push_16(uint value);
  955. INLINE void m68ki_push_32(uint value);
  956. INLINE uint m68ki_pull_16(void);
  957. INLINE uint m68ki_pull_32(void);
  958.  
  959. /* Program flow operations */
  960. INLINE void m68ki_jump(uint new_pc);
  961. INLINE void m68ki_jump_vector(uint vector);
  962. INLINE void m68ki_branch_8(uint offset);
  963. INLINE void m68ki_branch_16(uint offset);
  964. INLINE void m68ki_branch_32(uint offset);
  965.  
  966. /* Status register operations. */
  967. INLINE void m68ki_set_s_flag(uint value);            /* Only bit 2 of value should be set (i.e. 4 or 0) */
  968. INLINE void m68ki_set_sm_flag(uint value);           /* only bits 1 and 2 of value should be set */
  969. INLINE void m68ki_set_ccr(uint value);               /* set the condition code register */
  970. INLINE void m68ki_set_sr(uint value);                /* set the status register */
  971. INLINE void m68ki_set_sr_noint(uint value);          /* set the status register */
  972.  
  973. /* Exception processing */
  974. INLINE uint m68ki_init_exception(void);              /* Initial exception processing */
  975.  
  976. INLINE void m68ki_stack_frame_3word(uint pc, uint sr); /* Stack various frame types */
  977. INLINE void m68ki_stack_frame_buserr(uint sr);
  978.  
  979. INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector);
  980. INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector);
  981. INLINE void m68ki_stack_frame_0010(uint sr, uint vector);
  982. #if 0 /* unused */
  983. INLINE void m68ki_stack_frame_1000(uint pc, uint sr, uint vector);
  984. INLINE void m68ki_stack_frame_1010(uint sr, uint vector, uint pc);
  985. INLINE void m68ki_stack_frame_1011(uint sr, uint vector, uint pc);
  986. #endif
  987.  
  988. INLINE void m68ki_exception_trap(uint vector);
  989. INLINE void m68ki_exception_trapN(uint vector);
  990. INLINE void m68ki_exception_trace(void);
  991. INLINE void m68ki_exception_privilege_violation(void);
  992. INLINE void m68ki_exception_1010(void);
  993. INLINE void m68ki_exception_1111(void);
  994. INLINE void m68ki_exception_illegal(void);
  995. INLINE void m68ki_exception_format_error(void);
  996. INLINE void m68ki_exception_address_error(void);
  997. INLINE void m68ki_exception_interrupt(uint int_level);
  998. INLINE void m68ki_check_interrupts(void);            /* ASG: check for interrupts */
  999.  
  1000. /* quick disassembly (used for logging) */
  1001. char* m68ki_disassemble_quick(unsigned int pc, unsigned int cpu_type);
  1002.  
  1003.  
  1004. /* ======================================================================== */
  1005. /* =========================== UTILITY FUNCTIONS ========================== */
  1006. /* ======================================================================== */
  1007.  
  1008.  
  1009. /* ---------------------------- Read Immediate ---------------------------- */
  1010.  
  1011. /* Handles all immediate reads, does address error check, function code setting,
  1012.  * and prefetching if they are enabled in m68kconf.h
  1013.  */
  1014. INLINE uint m68ki_read_imm_16(void)
  1015. {
  1016.         m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
  1017.         m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
  1018. #if M68K_EMULATE_PREFETCH
  1019.         if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)
  1020.         {
  1021.                 CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);
  1022.                 CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));
  1023.         }
  1024.         REG_PC += 2;
  1025.         return MASK_OUT_ABOVE_16(CPU_PREF_DATA >> ((2-((REG_PC-2)&2))<<3));
  1026. #else
  1027.         REG_PC += 2;
  1028.         return m68k_read_immediate_16(ADDRESS_68K(REG_PC-2));
  1029. #endif /* M68K_EMULATE_PREFETCH */
  1030. }
  1031. INLINE uint m68ki_read_imm_32(void)
  1032. {
  1033. #if M68K_EMULATE_PREFETCH
  1034.         uint temp_val;
  1035.  
  1036.         m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
  1037.         m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
  1038.         if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)
  1039.         {
  1040.                 CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);
  1041.                 CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));
  1042.         }
  1043.         temp_val = CPU_PREF_DATA;
  1044.         REG_PC += 2;
  1045.         if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)
  1046.         {
  1047.                 CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);
  1048.                 CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));
  1049.                 temp_val = MASK_OUT_ABOVE_32((temp_val << 16) | (CPU_PREF_DATA >> 16));
  1050.         }
  1051.         REG_PC += 2;
  1052.  
  1053.         return temp_val;
  1054. #else
  1055.         m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
  1056.         m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
  1057.         REG_PC += 4;
  1058.         return m68k_read_immediate_32(ADDRESS_68K(REG_PC-4));
  1059. #endif /* M68K_EMULATE_PREFETCH */
  1060. }
  1061.  
  1062.  
  1063.  
  1064. /* ------------------------- Top level read/write ------------------------- */
  1065.  
  1066. #if M68K_REGISTER_MEMORY
  1067.  
  1068. INLINE m68k_mem_t *m68ki_locate_memory(uint address)
  1069. {
  1070.         unsigned int i;
  1071.  
  1072.         if (m68ki_cpu.mem == NULL)
  1073.                 return NULL;
  1074.         for (i = 0; (i != m68ki_cpu.mem_len); ++i) {
  1075.                 m68k_mem_t *mem = &(*m68ki_cpu.mem)[i];
  1076.  
  1077.                 if (((address ^ mem->swab) >= mem->addr) &&
  1078.                     ((address ^ mem->swab) < (mem->addr + mem->size)))
  1079.                         return mem;
  1080.         }
  1081.         return NULL;
  1082. }
  1083.  
  1084. #define m68ki_read_memory_8_direct(a)                                   \
  1085.         do {                                                            \
  1086.                 m68k_mem_t *mem = m68ki_locate_memory(a);               \
  1087.                                                                         \
  1088.                 if (mem != NULL)                                        \
  1089.                         return ((uint8 *)mem->mem)                      \
  1090.                                 [((((a) - mem->addr) ^ mem->swab) &     \
  1091.                                   mem->mask)];                          \
  1092.         }                                                               \
  1093.         while (0)
  1094.  
  1095. #define m68ki_read_memory_16_direct(a)                                  \
  1096.         do {                                                            \
  1097.                 m68k_mem_t *mem = m68ki_locate_memory(a);               \
  1098.                                                                         \
  1099.                 if (mem != NULL) {                                      \
  1100.                         uint8 *m = &((uint8 *)mem->mem)                 \
  1101.                                 [(((a) - mem->addr) & mem->mask)];      \
  1102.                                                                         \
  1103.                         return ((m[mem->swab] << 8) |                   \
  1104.                                 m[(mem->swab ^ 1)]);                    \
  1105.                 }                                                       \
  1106.         }                                                               \
  1107.         while (0)
  1108.  
  1109. #define m68ki_read_memory_32_direct(a)                                  \
  1110.         do {                                                            \
  1111.                 m68k_mem_t *mem = m68ki_locate_memory(a);               \
  1112.                                                                         \
  1113.                 if (mem != NULL) {                                      \
  1114.                         uint8 *m = &((uint8 *)mem->mem)                 \
  1115.                                 [(((a) - mem->addr) & mem->mask)];      \
  1116.                                                                         \
  1117.                         return ((m[mem->swab] << 24) |                  \
  1118.                                 (m[(mem->swab ^ 1)] << 16) |            \
  1119.                                 (m[(mem->swab + 2)] << 8) |             \
  1120.                                 m[((mem->swab + 2) ^ 1)]);              \
  1121.                 }                                                       \
  1122.         }                                                               \
  1123.         while (0)
  1124.  
  1125. #define m68ki_write_memory_8_direct(a, v)                               \
  1126.         do {                                                            \
  1127.                 m68k_mem_t *mem = m68ki_locate_memory(a);               \
  1128.                                                                         \
  1129.                 if ((mem != NULL) && (mem->w)) {                        \
  1130.                         ((uint8 *)mem->mem)                             \
  1131.                                 [((((a) - mem->addr) ^ mem->swab) &     \
  1132.                                   mem->mask)] = (v);                    \
  1133.                         return;                                         \
  1134.                 }                                                       \
  1135.         }                                                               \
  1136.         while (0);
  1137.  
  1138. #define m68ki_write_memory_16_direct(a, v)                              \
  1139.         do {                                                            \
  1140.                 m68k_mem_t *mem = m68ki_locate_memory(a);               \
  1141.                                                                         \
  1142.                 if ((mem != NULL) && (mem->w)) {                        \
  1143.                         uint8 *m = &((uint8 *)mem->mem)                 \
  1144.                                 [(((a) - mem->addr) & mem->mask)];      \
  1145.                                                                         \
  1146.                         m[mem->swab] = ((v) >> 8);                      \
  1147.                         m[(mem->swab ^ 1)] = (v);                       \
  1148.                         return;                                         \
  1149.                 }                                                       \
  1150.         }                                                               \
  1151.         while (0);
  1152.  
  1153. #define m68ki_write_memory_32_direct(a, v)                              \
  1154.         do {                                                            \
  1155.                 m68k_mem_t *mem = m68ki_locate_memory(a);               \
  1156.                                                                         \
  1157.                 if ((mem != NULL) && (mem->w)) {                        \
  1158.                         uint8 *m = &((uint8 *)mem->mem)                 \
  1159.                                 [(((a) - mem->addr) & mem->mask)];      \
  1160.                                                                         \
  1161.                         m[mem->swab] = ((v) >> 24);                     \
  1162.                         m[(mem->swab ^ 1)] = ((v) >> 16);               \
  1163.                         m[(mem->swab + 2)] = ((v) >> 8);                \
  1164.                         m[((mem->swab + 2) ^ 1)] = (v);                 \
  1165.                         return;                                         \
  1166.                 }                                                       \
  1167.         }                                                               \
  1168.         while (0);
  1169.  
  1170. #else /* M68K_REGISTER_MEMORY */
  1171.  
  1172. #define m68ki_read_memory_8_direct(a) (void)0
  1173. #define m68ki_read_memory_16_direct(a) (void)0
  1174. #define m68ki_read_memory_32_direct(a) (void)0
  1175.  
  1176. #define m68ki_write_memory_8_direct(a, v) (void)0
  1177. #define m68ki_write_memory_16_direct(a, v) (void)0
  1178. #define m68ki_write_memory_32_direct(a, v) (void)0
  1179.  
  1180. #endif /* M68K_REGISTER_MEMORY */
  1181.  
  1182. /* Handles all memory accesses (except for immediate reads if they are
  1183.  * configured to use separate functions in m68kconf.h).
  1184.  * All memory accesses must go through these top level functions.
  1185.  * These functions will also check for address error and set the function
  1186.  * code if they are enabled in m68kconf.h.
  1187.  */
  1188. INLINE uint m68ki_read_8_fc(uint address, uint fc)
  1189. {
  1190.         m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
  1191.         m68ki_read_memory_8_direct(ADDRESS_68K(address));
  1192.         return m68k_read_memory_8(ADDRESS_68K(address));
  1193. }
  1194. INLINE uint m68ki_read_16_fc(uint address, uint fc)
  1195. {
  1196.         m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
  1197.         m68ki_check_address_error_010_less(address, MODE_READ, fc); /* auto-disable (see m68kcpu.h) */
  1198.         m68ki_read_memory_16_direct(ADDRESS_68K(address));
  1199.         return m68k_read_memory_16(ADDRESS_68K(address));
  1200. }
  1201. INLINE uint m68ki_read_32_fc(uint address, uint fc)
  1202. {
  1203.         m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
  1204.         m68ki_check_address_error_010_less(address, MODE_READ, fc); /* auto-disable (see m68kcpu.h) */
  1205.         m68ki_read_memory_32_direct(ADDRESS_68K(address));
  1206.         return m68k_read_memory_32(ADDRESS_68K(address));
  1207. }
  1208.  
  1209. INLINE void m68ki_write_8_fc(uint address, uint fc, uint value)
  1210. {
  1211.         m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
  1212.         m68ki_write_memory_8_direct(ADDRESS_68K(address), value);
  1213.         m68k_write_memory_8(ADDRESS_68K(address), value);
  1214. }
  1215. INLINE void m68ki_write_16_fc(uint address, uint fc, uint value)
  1216. {
  1217.         m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
  1218.         m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */
  1219.         m68ki_write_memory_16_direct(ADDRESS_68K(address), value);
  1220.         m68k_write_memory_16(ADDRESS_68K(address), value);
  1221. }
  1222. INLINE void m68ki_write_32_fc(uint address, uint fc, uint value)
  1223. {
  1224.         m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
  1225.         m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */
  1226.         m68ki_write_memory_32_direct(ADDRESS_68K(address), value);
  1227.         m68k_write_memory_32(ADDRESS_68K(address), value);
  1228. }
  1229.  
  1230. #if M68K_SIMULATE_PD_WRITES
  1231. INLINE void m68ki_write_32_pd_fc(uint address, uint fc, uint value)
  1232. {
  1233.         m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
  1234.         m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */
  1235.         m68k_write_memory_32_pd(ADDRESS_68K(address), value);
  1236. }
  1237. #endif
  1238.  
  1239.  
  1240. /* --------------------- Effective Address Calculation -------------------- */
  1241.  
  1242. /* The program counter relative addressing modes cause operands to be
  1243.  * retrieved from program space, not data space.
  1244.  */
  1245. INLINE uint m68ki_get_ea_pcdi(void)
  1246. {
  1247.         uint old_pc = REG_PC;
  1248.         m68ki_use_program_space(); /* auto-disable */
  1249.         return old_pc + MAKE_INT_16(m68ki_read_imm_16());
  1250. }
  1251.  
  1252.  
  1253. INLINE uint m68ki_get_ea_pcix(void)
  1254. {
  1255.         m68ki_use_program_space(); /* auto-disable */
  1256.         return m68ki_get_ea_ix(REG_PC);
  1257. }
  1258.  
  1259. /* Indexed addressing modes are encoded as follows:
  1260.  *
  1261.  * Base instruction format:
  1262.  * F E D C B A 9 8 7 6 | 5 4 3 | 2 1 0
  1263.  * x x x x x x x x x x | 1 1 0 | BASE REGISTER      (An)
  1264.  *
  1265.  * Base instruction format for destination EA in move instructions:
  1266.  * F E D C | B A 9    | 8 7 6 | 5 4 3 2 1 0
  1267.  * x x x x | BASE REG | 1 1 0 | X X X X X X       (An)
  1268.  *
  1269.  * Brief extension format:
  1270.  *  F  |  E D C   |  B  |  A 9  | 8 | 7 6 5 4 3 2 1 0
  1271.  * D/A | REGISTER | W/L | SCALE | 0 |  DISPLACEMENT
  1272.  *
  1273.  * Full extension format:
  1274.  *  F     E D C      B     A 9    8   7    6    5 4       3   2 1 0
  1275.  * D/A | REGISTER | W/L | SCALE | 1 | BS | IS | BD SIZE | 0 | I/IS
  1276.  * BASE DISPLACEMENT (0, 16, 32 bit)                (bd)
  1277.  * OUTER DISPLACEMENT (0, 16, 32 bit)               (od)
  1278.  *
  1279.  * D/A:     0 = Dn, 1 = An                          (Xn)
  1280.  * W/L:     0 = W (sign extend), 1 = L              (.SIZE)
  1281.  * SCALE:   00=1, 01=2, 10=4, 11=8                  (*SCALE)
  1282.  * BS:      0=add base reg, 1=suppress base reg     (An suppressed)
  1283.  * IS:      0=add index, 1=suppress index           (Xn suppressed)
  1284.  * BD SIZE: 00=reserved, 01=NULL, 10=Word, 11=Long  (size of bd)
  1285.  *
  1286.  * IS I/IS Operation
  1287.  * 0  000  No Memory Indirect
  1288.  * 0  001  indir prex with null outer
  1289.  * 0  010  indir prex with word outer
  1290.  * 0  011  indir prex with long outer
  1291.  * 0  100  reserved
  1292.  * 0  101  indir postx with null outer
  1293.  * 0  110  indir postx with word outer
  1294.  * 0  111  indir postx with long outer
  1295.  * 1  000  no memory indirect
  1296.  * 1  001  mem indir with null outer
  1297.  * 1  010  mem indir with word outer
  1298.  * 1  011  mem indir with long outer
  1299.  * 1  100-111  reserved
  1300.  */
  1301. INLINE uint m68ki_get_ea_ix(uint An)
  1302. {
  1303.         /* An = base register */
  1304.         uint extension = m68ki_read_imm_16();
  1305.         uint Xn = 0;                        /* Index register */
  1306.         uint bd = 0;                        /* Base Displacement */
  1307.         uint od = 0;                        /* Outer Displacement */
  1308.  
  1309.         if(CPU_TYPE_IS_010_LESS(CPU_TYPE))
  1310.         {
  1311.                 /* Calculate index */
  1312.                 Xn = REG_DA[extension>>12];     /* Xn */
  1313.                 if(!BIT_B(extension))           /* W/L */
  1314.                         Xn = MAKE_INT_16(Xn);
  1315.  
  1316.                 /* Add base register and displacement and return */
  1317.                 return An + Xn + MAKE_INT_8(extension);
  1318.         }
  1319.  
  1320.         /* Brief extension format */
  1321.         if(!BIT_8(extension))
  1322.         {
  1323.                 /* Calculate index */
  1324.                 Xn = REG_DA[extension>>12];     /* Xn */
  1325.                 if(!BIT_B(extension))           /* W/L */
  1326.                         Xn = MAKE_INT_16(Xn);
  1327.                 /* Add scale if proper CPU type */
  1328.                 if(CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))
  1329.                         Xn <<= (extension>>9) & 3;  /* SCALE */
  1330.  
  1331.                 /* Add base register and displacement and return */
  1332.                 return An + Xn + MAKE_INT_8(extension);
  1333.         }
  1334.  
  1335.         /* Full extension format */
  1336.  
  1337.         USE_CYCLES(m68ki_ea_idx_cycle_table[extension&0x3f]);
  1338.  
  1339.         /* Check if base register is present */
  1340.         if(BIT_7(extension))                /* BS */
  1341.                 An = 0;                         /* An */
  1342.  
  1343.         /* Check if index is present */
  1344.         if(!BIT_6(extension))               /* IS */
  1345.         {
  1346.                 Xn = REG_DA[extension>>12];     /* Xn */
  1347.                 if(!BIT_B(extension))           /* W/L */
  1348.                         Xn = MAKE_INT_16(Xn);
  1349.                 Xn <<= (extension>>9) & 3;      /* SCALE */
  1350.         }
  1351.  
  1352.         /* Check if base displacement is present */
  1353.         if(BIT_5(extension))                /* BD SIZE */
  1354.                 bd = BIT_4(extension) ? m68ki_read_imm_32() : MAKE_UINT_16(m68ki_read_imm_16());
  1355.  
  1356.         /* If no indirect action, we are done */
  1357.         if(!(extension&7))                  /* No Memory Indirect */
  1358.                 return An + bd + Xn;
  1359.  
  1360.         /* Check if outer displacement is present */
  1361.         if(BIT_1(extension))                /* I/IS:  od */
  1362.                 od = BIT_0(extension) ? m68ki_read_imm_32() : MAKE_UINT_16(m68ki_read_imm_16());
  1363.  
  1364.         /* Postindex */
  1365.         if(BIT_2(extension))                /* I/IS:  0 = preindex, 1 = postindex */
  1366.                 return m68ki_read_32(An + bd) + Xn + od;
  1367.  
  1368.         /* Preindex */
  1369.         return m68ki_read_32(An + bd + Xn) + od;
  1370. }
  1371.  
  1372.  
  1373. /* Fetch operands */
  1374. INLINE uint OPER_AY_AI_8(void)  {uint ea = EA_AY_AI_8();  return m68ki_read_8(ea); }
  1375. INLINE uint OPER_AY_AI_16(void) {uint ea = EA_AY_AI_16(); return m68ki_read_16(ea);}
  1376. INLINE uint OPER_AY_AI_32(void) {uint ea = EA_AY_AI_32(); return m68ki_read_32(ea);}
  1377. INLINE uint OPER_AY_PI_8(void)  {uint ea = EA_AY_PI_8();  return m68ki_read_8(ea); }
  1378. INLINE uint OPER_AY_PI_16(void) {uint ea = EA_AY_PI_16(); return m68ki_read_16(ea);}
  1379. INLINE uint OPER_AY_PI_32(void) {uint ea = EA_AY_PI_32(); return m68ki_read_32(ea);}
  1380. INLINE uint OPER_AY_PD_8(void)  {uint ea = EA_AY_PD_8();  return m68ki_read_8(ea); }
  1381. INLINE uint OPER_AY_PD_16(void) {uint ea = EA_AY_PD_16(); return m68ki_read_16(ea);}
  1382. INLINE uint OPER_AY_PD_32(void) {uint ea = EA_AY_PD_32(); return m68ki_read_32(ea);}
  1383. INLINE uint OPER_AY_DI_8(void)  {uint ea = EA_AY_DI_8();  return m68ki_read_8(ea); }
  1384. INLINE uint OPER_AY_DI_16(void) {uint ea = EA_AY_DI_16(); return m68ki_read_16(ea);}
  1385. INLINE uint OPER_AY_DI_32(void) {uint ea = EA_AY_DI_32(); return m68ki_read_32(ea);}
  1386. INLINE uint OPER_AY_IX_8(void)  {uint ea = EA_AY_IX_8();  return m68ki_read_8(ea); }
  1387. INLINE uint OPER_AY_IX_16(void) {uint ea = EA_AY_IX_16(); return m68ki_read_16(ea);}
  1388. INLINE uint OPER_AY_IX_32(void) {uint ea = EA_AY_IX_32(); return m68ki_read_32(ea);}
  1389.  
  1390. INLINE uint OPER_AX_AI_8(void)  {uint ea = EA_AX_AI_8();  return m68ki_read_8(ea); }
  1391. INLINE uint OPER_AX_AI_16(void) {uint ea = EA_AX_AI_16(); return m68ki_read_16(ea);}
  1392. INLINE uint OPER_AX_AI_32(void) {uint ea = EA_AX_AI_32(); return m68ki_read_32(ea);}
  1393. INLINE uint OPER_AX_PI_8(void)  {uint ea = EA_AX_PI_8();  return m68ki_read_8(ea); }
  1394. INLINE uint OPER_AX_PI_16(void) {uint ea = EA_AX_PI_16(); return m68ki_read_16(ea);}
  1395. INLINE uint OPER_AX_PI_32(void) {uint ea = EA_AX_PI_32(); return m68ki_read_32(ea);}
  1396. INLINE uint OPER_AX_PD_8(void)  {uint ea = EA_AX_PD_8();  return m68ki_read_8(ea); }
  1397. INLINE uint OPER_AX_PD_16(void) {uint ea = EA_AX_PD_16(); return m68ki_read_16(ea);}
  1398. INLINE uint OPER_AX_PD_32(void) {uint ea = EA_AX_PD_32(); return m68ki_read_32(ea);}
  1399. INLINE uint OPER_AX_DI_8(void)  {uint ea = EA_AX_DI_8();  return m68ki_read_8(ea); }
  1400. INLINE uint OPER_AX_DI_16(void) {uint ea = EA_AX_DI_16(); return m68ki_read_16(ea);}
  1401. INLINE uint OPER_AX_DI_32(void) {uint ea = EA_AX_DI_32(); return m68ki_read_32(ea);}
  1402. INLINE uint OPER_AX_IX_8(void)  {uint ea = EA_AX_IX_8();  return m68ki_read_8(ea); }
  1403. INLINE uint OPER_AX_IX_16(void) {uint ea = EA_AX_IX_16(); return m68ki_read_16(ea);}
  1404. INLINE uint OPER_AX_IX_32(void) {uint ea = EA_AX_IX_32(); return m68ki_read_32(ea);}
  1405.  
  1406. INLINE uint OPER_A7_PI_8(void)  {uint ea = EA_A7_PI_8();  return m68ki_read_8(ea); }
  1407. INLINE uint OPER_A7_PD_8(void)  {uint ea = EA_A7_PD_8();  return m68ki_read_8(ea); }
  1408.  
  1409. INLINE uint OPER_AW_8(void)     {uint ea = EA_AW_8();     return m68ki_read_8(ea); }
  1410. INLINE uint OPER_AW_16(void)    {uint ea = EA_AW_16();    return m68ki_read_16(ea);}
  1411. INLINE uint OPER_AW_32(void)    {uint ea = EA_AW_32();    return m68ki_read_32(ea);}
  1412. INLINE uint OPER_AL_8(void)     {uint ea = EA_AL_8();     return m68ki_read_8(ea); }
  1413. INLINE uint OPER_AL_16(void)    {uint ea = EA_AL_16();    return m68ki_read_16(ea);}
  1414. INLINE uint OPER_AL_32(void)    {uint ea = EA_AL_32();    return m68ki_read_32(ea);}
  1415. INLINE uint OPER_PCDI_8(void)   {uint ea = EA_PCDI_8();   return m68ki_read_pcrel_8(ea); }
  1416. INLINE uint OPER_PCDI_16(void)  {uint ea = EA_PCDI_16();  return m68ki_read_pcrel_16(ea);}
  1417. INLINE uint OPER_PCDI_32(void)  {uint ea = EA_PCDI_32();  return m68ki_read_pcrel_32(ea);}
  1418. INLINE uint OPER_PCIX_8(void)   {uint ea = EA_PCIX_8();   return m68ki_read_pcrel_8(ea); }
  1419. INLINE uint OPER_PCIX_16(void)  {uint ea = EA_PCIX_16();  return m68ki_read_pcrel_16(ea);}
  1420. INLINE uint OPER_PCIX_32(void)  {uint ea = EA_PCIX_32();  return m68ki_read_pcrel_32(ea);}
  1421.  
  1422.  
  1423.  
  1424. /* ---------------------------- Stack Functions --------------------------- */
  1425.  
  1426. /* Push/pull data from the stack */
  1427. INLINE void m68ki_push_16(uint value)
  1428. {
  1429.         REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);
  1430.         m68ki_write_16(REG_SP, value);
  1431. }
  1432.  
  1433. INLINE void m68ki_push_32(uint value)
  1434. {
  1435.         REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);
  1436.         m68ki_write_32(REG_SP, value);
  1437. }
  1438.  
  1439. INLINE uint m68ki_pull_16(void)
  1440. {
  1441.         REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);
  1442.         return m68ki_read_16(REG_SP-2);
  1443. }
  1444.  
  1445. INLINE uint m68ki_pull_32(void)
  1446. {
  1447.         REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);
  1448.         return m68ki_read_32(REG_SP-4);
  1449. }
  1450.  
  1451.  
  1452. /* Increment/decrement the stack as if doing a push/pull but
  1453.  * don't do any memory access.
  1454.  */
  1455. INLINE void m68ki_fake_push_16(void)
  1456. {
  1457.         REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);
  1458. }
  1459.  
  1460. INLINE void m68ki_fake_push_32(void)
  1461. {
  1462.         REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);
  1463. }
  1464.  
  1465. INLINE void m68ki_fake_pull_16(void)
  1466. {
  1467.         REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);
  1468. }
  1469.  
  1470. INLINE void m68ki_fake_pull_32(void)
  1471. {
  1472.         REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);
  1473. }
  1474.  
  1475.  
  1476. /* ----------------------------- Program Flow ----------------------------- */
  1477.  
  1478. /* Jump to a new program location or vector.
  1479.  * These functions will also call the pc_changed callback if it was enabled
  1480.  * in m68kconf.h.
  1481.  */
  1482. INLINE void m68ki_jump(uint new_pc)
  1483. {
  1484.         REG_PC = new_pc;
  1485.         m68ki_pc_changed(REG_PC);
  1486. }
  1487.  
  1488. INLINE void m68ki_jump_vector(uint vector)
  1489. {
  1490.         REG_PC = (vector<<2) + REG_VBR;
  1491.         REG_PC = m68ki_read_data_32(REG_PC);
  1492.         m68ki_pc_changed(REG_PC);
  1493. }
  1494.  
  1495.  
  1496. /* Branch to a new memory location.
  1497.  * The 32-bit branch will call pc_changed if it was enabled in m68kconf.h.
  1498.  * So far I've found no problems with not calling pc_changed for 8 or 16
  1499.  * bit branches.
  1500.  */
  1501. INLINE void m68ki_branch_8(uint offset)
  1502. {
  1503.         REG_PC += MAKE_INT_8(offset);
  1504. }
  1505.  
  1506. INLINE void m68ki_branch_16(uint offset)
  1507. {
  1508.         REG_PC += MAKE_INT_16(offset);
  1509. }
  1510.  
  1511. INLINE void m68ki_branch_32(uint offset)
  1512. {
  1513.         REG_PC += offset;
  1514.         m68ki_pc_changed(REG_PC);
  1515. }
  1516.  
  1517.  
  1518.  
  1519. /* ---------------------------- Status Register --------------------------- */
  1520.  
  1521. /* Set the S flag and change the active stack pointer.
  1522.  * Note that value MUST be 4 or 0.
  1523.  */
  1524. INLINE void m68ki_set_s_flag(uint value)
  1525. {
  1526.         /* Backup the old stack pointer */
  1527.         REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;
  1528.         /* Set the S flag */
  1529.         FLAG_S = value;
  1530.         /* Set the new stack pointer */
  1531.         REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];
  1532. }
  1533.  
  1534. /* Set the S and M flags and change the active stack pointer.
  1535.  * Note that value MUST be 0, 2, 4, or 6 (bit2 = S, bit1 = M).
  1536.  */
  1537. INLINE void m68ki_set_sm_flag(uint value)
  1538. {
  1539.         /* Backup the old stack pointer */
  1540.         REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;
  1541.         /* Set the S and M flags */
  1542.         FLAG_S = value & SFLAG_SET;
  1543.         FLAG_M = value & MFLAG_SET;
  1544.         /* Set the new stack pointer */
  1545.         REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];
  1546. }
  1547.  
  1548. /* Set the S and M flags.  Don't touch the stack pointer. */
  1549. INLINE void m68ki_set_sm_flag_nosp(uint value)
  1550. {
  1551.         /* Set the S and M flags */
  1552.         FLAG_S = value & SFLAG_SET;
  1553.         FLAG_M = value & MFLAG_SET;
  1554. }
  1555.  
  1556.  
  1557. /* Set the condition code register */
  1558. INLINE void m68ki_set_ccr(uint value)
  1559. {
  1560.         FLAG_X = BIT_4(value)  << 4;
  1561.         FLAG_N = BIT_3(value)  << 4;
  1562.         FLAG_Z = !BIT_2(value);
  1563.         FLAG_V = BIT_1(value)  << 6;
  1564.         FLAG_C = BIT_0(value)  << 8;
  1565. }
  1566.  
  1567. /* Set the status register but don't check for interrupts */
  1568. INLINE void m68ki_set_sr_noint(uint value)
  1569. {
  1570.         /* Mask out the "unimplemented" bits */
  1571.         value &= CPU_SR_MASK;
  1572.  
  1573.         /* Now set the status register */
  1574.         FLAG_T1 = BIT_F(value);
  1575.         FLAG_T0 = BIT_E(value);
  1576.         FLAG_INT_MASK = value & 0x0700;
  1577.         m68ki_set_ccr(value);
  1578.         m68ki_set_sm_flag((value >> 11) & 6);
  1579. }
  1580.  
  1581. /* Set the status register but don't check for interrupts nor
  1582.  * change the stack pointer
  1583.  */
  1584. INLINE void m68ki_set_sr_noint_nosp(uint value)
  1585. {
  1586.         /* Mask out the "unimplemented" bits */
  1587.         value &= CPU_SR_MASK;
  1588.  
  1589.         /* Now set the status register */
  1590.         FLAG_T1 = BIT_F(value);
  1591.         FLAG_T0 = BIT_E(value);
  1592.         FLAG_INT_MASK = value & 0x0700;
  1593.         m68ki_set_ccr(value);
  1594.         m68ki_set_sm_flag_nosp((value >> 11) & 6);
  1595. }
  1596.  
  1597. /* Set the status register and check for interrupts */
  1598. INLINE void m68ki_set_sr(uint value)
  1599. {
  1600.         m68ki_set_sr_noint(value);
  1601.         m68ki_check_interrupts();
  1602. }
  1603.  
  1604.  
  1605. /* ------------------------- Exception Processing ------------------------- */
  1606.  
  1607. /* Initiate exception processing */
  1608. INLINE uint m68ki_init_exception(void)
  1609. {
  1610.         /* Save the old status register */
  1611.         uint sr = m68ki_get_sr();
  1612.  
  1613.         /* Turn off trace flag, clear pending traces */
  1614.         FLAG_T1 = FLAG_T0 = 0;
  1615.         m68ki_clear_trace();
  1616.         /* Enter supervisor mode */
  1617.         m68ki_set_s_flag(SFLAG_SET);
  1618.  
  1619.         return sr;
  1620. }
  1621.  
  1622. /* 3 word stack frame (68000 only) */
  1623. INLINE void m68ki_stack_frame_3word(uint pc, uint sr)
  1624. {
  1625.         m68ki_push_32(pc);
  1626.         m68ki_push_16(sr);
  1627. }
  1628.  
  1629. /* Format 0 stack frame.
  1630.  * This is the standard stack frame for 68010+.
  1631.  */
  1632. INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector)
  1633. {
  1634.         /* Stack a 3-word frame if we are 68000 */
  1635.         if(CPU_TYPE == CPU_TYPE_000 || CPU_TYPE == CPU_TYPE_008)
  1636.         {
  1637.                 m68ki_stack_frame_3word(pc, sr);
  1638.                 return;
  1639.         }
  1640.         m68ki_push_16(vector<<2);
  1641.         m68ki_push_32(pc);
  1642.         m68ki_push_16(sr);
  1643. }
  1644.  
  1645. /* Format 1 stack frame (68020).
  1646.  * For 68020, this is the 4 word throwaway frame.
  1647.  */
  1648. INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector)
  1649. {
  1650.         m68ki_push_16(0x1000 | (vector<<2));
  1651.         m68ki_push_32(pc);
  1652.         m68ki_push_16(sr);
  1653. }
  1654.  
  1655. /* Format 2 stack frame.
  1656.  * This is used only by 68020 for trap exceptions.
  1657.  */
  1658. INLINE void m68ki_stack_frame_0010(uint sr, uint vector)
  1659. {
  1660.         m68ki_push_32(REG_PPC);
  1661.         m68ki_push_16(0x2000 | (vector<<2));
  1662.         m68ki_push_32(REG_PC);
  1663.         m68ki_push_16(sr);
  1664. }
  1665.  
  1666.  
  1667. /* Bus error stack frame (68000 only).
  1668.  */
  1669. INLINE void m68ki_stack_frame_buserr(uint sr)
  1670. {
  1671.         m68ki_push_32(REG_PC);
  1672.         m68ki_push_16(sr);
  1673.         m68ki_push_16(REG_IR);
  1674.         m68ki_push_32(m68ki_aerr_address);      /* access address */
  1675.         /* 0 0 0 0 0 0 0 0 0 0 0 R/W I/N FC
  1676.      * R/W  0 = write, 1 = read
  1677.      * I/N  0 = instruction, 1 = not
  1678.      * FC   3-bit function code
  1679.      */
  1680.         m68ki_push_16(m68ki_aerr_write_mode | CPU_INSTR_MODE | m68ki_aerr_fc);
  1681. }
  1682.  
  1683. #if 0 /* unused */
  1684. /* Format 8 stack frame (68010).
  1685.  * 68010 only.  This is the 29 word bus/address error frame.
  1686.  */
  1687. void m68ki_stack_frame_1000(uint pc, uint sr, uint vector)
  1688. {
  1689.         /* VERSION
  1690.      * NUMBER
  1691.      * INTERNAL INFORMATION, 16 WORDS
  1692.      */
  1693.         m68ki_fake_push_32();
  1694.         m68ki_fake_push_32();
  1695.         m68ki_fake_push_32();
  1696.         m68ki_fake_push_32();
  1697.         m68ki_fake_push_32();
  1698.         m68ki_fake_push_32();
  1699.         m68ki_fake_push_32();
  1700.         m68ki_fake_push_32();
  1701.  
  1702.         /* INSTRUCTION INPUT BUFFER */
  1703.         m68ki_push_16(0);
  1704.  
  1705.         /* UNUSED, RESERVED (not written) */
  1706.         m68ki_fake_push_16();
  1707.  
  1708.         /* DATA INPUT BUFFER */
  1709.         m68ki_push_16(0);
  1710.  
  1711.         /* UNUSED, RESERVED (not written) */
  1712.         m68ki_fake_push_16();
  1713.  
  1714.         /* DATA OUTPUT BUFFER */
  1715.         m68ki_push_16(0);
  1716.  
  1717.         /* UNUSED, RESERVED (not written) */
  1718.         m68ki_fake_push_16();
  1719.  
  1720.         /* FAULT ADDRESS */
  1721.         m68ki_push_32(0);
  1722.  
  1723.         /* SPECIAL STATUS WORD */
  1724.         m68ki_push_16(0);
  1725.  
  1726.         /* 1000, VECTOR OFFSET */
  1727.         m68ki_push_16(0x8000 | (vector<<2));
  1728.  
  1729.         /* PROGRAM COUNTER */
  1730.         m68ki_push_32(pc);
  1731.  
  1732.         /* STATUS REGISTER */
  1733.         m68ki_push_16(sr);
  1734. }
  1735.  
  1736. /* Format A stack frame (short bus fault).
  1737.  * This is used only by 68020 for bus fault and address error
  1738.  * if the error happens at an instruction boundary.
  1739.  * PC stacked is address of next instruction.
  1740.  */
  1741. void m68ki_stack_frame_1010(uint sr, uint vector, uint pc)
  1742. {
  1743.         /* INTERNAL REGISTER */
  1744.         m68ki_push_16(0);
  1745.  
  1746.         /* INTERNAL REGISTER */
  1747.         m68ki_push_16(0);
  1748.  
  1749.         /* DATA OUTPUT BUFFER (2 words) */
  1750.         m68ki_push_32(0);
  1751.  
  1752.         /* INTERNAL REGISTER */
  1753.         m68ki_push_16(0);
  1754.  
  1755.         /* INTERNAL REGISTER */
  1756.         m68ki_push_16(0);
  1757.  
  1758.         /* DATA CYCLE FAULT ADDRESS (2 words) */
  1759.         m68ki_push_32(0);
  1760.  
  1761.         /* INSTRUCTION PIPE STAGE B */
  1762.         m68ki_push_16(0);
  1763.  
  1764.         /* INSTRUCTION PIPE STAGE C */
  1765.         m68ki_push_16(0);
  1766.  
  1767.         /* SPECIAL STATUS REGISTER */
  1768.         m68ki_push_16(0);
  1769.  
  1770.         /* INTERNAL REGISTER */
  1771.         m68ki_push_16(0);
  1772.  
  1773.         /* 1010, VECTOR OFFSET */
  1774.         m68ki_push_16(0xa000 | (vector<<2));
  1775.  
  1776.         /* PROGRAM COUNTER */
  1777.         m68ki_push_32(pc);
  1778.  
  1779.         /* STATUS REGISTER */
  1780.         m68ki_push_16(sr);
  1781. }
  1782.  
  1783. /* Format B stack frame (long bus fault).
  1784.  * This is used only by 68020 for bus fault and address error
  1785.  * if the error happens during instruction execution.
  1786.  * PC stacked is address of instruction in progress.
  1787.  */
  1788. void m68ki_stack_frame_1011(uint sr, uint vector, uint pc)
  1789. {
  1790.         /* INTERNAL REGISTERS (18 words) */
  1791.         m68ki_push_32(0);
  1792.         m68ki_push_32(0);
  1793.         m68ki_push_32(0);
  1794.         m68ki_push_32(0);
  1795.         m68ki_push_32(0);
  1796.         m68ki_push_32(0);
  1797.         m68ki_push_32(0);
  1798.         m68ki_push_32(0);
  1799.         m68ki_push_32(0);
  1800.  
  1801.         /* VERSION# (4 bits), INTERNAL INFORMATION */
  1802.         m68ki_push_16(0);
  1803.  
  1804.         /* INTERNAL REGISTERS (3 words) */
  1805.         m68ki_push_32(0);
  1806.         m68ki_push_16(0);
  1807.  
  1808.         /* DATA INTPUT BUFFER (2 words) */
  1809.         m68ki_push_32(0);
  1810.  
  1811.         /* INTERNAL REGISTERS (2 words) */
  1812.         m68ki_push_32(0);
  1813.  
  1814.         /* STAGE B ADDRESS (2 words) */
  1815.         m68ki_push_32(0);
  1816.  
  1817.         /* INTERNAL REGISTER (4 words) */
  1818.         m68ki_push_32(0);
  1819.         m68ki_push_32(0);
  1820.  
  1821.         /* DATA OUTPUT BUFFER (2 words) */
  1822.         m68ki_push_32(0);
  1823.  
  1824.         /* INTERNAL REGISTER */
  1825.         m68ki_push_16(0);
  1826.  
  1827.         /* INTERNAL REGISTER */
  1828.         m68ki_push_16(0);
  1829.  
  1830.         /* DATA CYCLE FAULT ADDRESS (2 words) */
  1831.         m68ki_push_32(0);
  1832.  
  1833.         /* INSTRUCTION PIPE STAGE B */
  1834.         m68ki_push_16(0);
  1835.  
  1836.         /* INSTRUCTION PIPE STAGE C */
  1837.         m68ki_push_16(0);
  1838.  
  1839.         /* SPECIAL STATUS REGISTER */
  1840.         m68ki_push_16(0);
  1841.  
  1842.         /* INTERNAL REGISTER */
  1843.         m68ki_push_16(0);
  1844.  
  1845.         /* 1011, VECTOR OFFSET */
  1846.         m68ki_push_16(0xb000 | (vector<<2));
  1847.  
  1848.         /* PROGRAM COUNTER */
  1849.         m68ki_push_32(pc);
  1850.  
  1851.         /* STATUS REGISTER */
  1852.         m68ki_push_16(sr);
  1853. }
  1854. #endif /* unused */
  1855.  
  1856.  
  1857. /* Used for Group 2 exceptions.
  1858.  * These stack a type 2 frame on the 020.
  1859.  */
  1860. INLINE void m68ki_exception_trap(uint vector)
  1861. {
  1862.         uint sr = m68ki_init_exception();
  1863.  
  1864.         if(CPU_TYPE_IS_010_LESS(CPU_TYPE))
  1865.                 m68ki_stack_frame_0000(REG_PC, sr, vector);
  1866.         else
  1867.                 m68ki_stack_frame_0010(sr, vector);
  1868.  
  1869.         m68ki_jump_vector(vector);
  1870.  
  1871.         /* Use up some clock cycles */
  1872.         USE_CYCLES(CYC_EXCEPTION[vector]);
  1873. }
  1874.  
  1875. /* Trap#n stacks a 0 frame but behaves like group2 otherwise */
  1876. INLINE void m68ki_exception_trapN(uint vector)
  1877. {
  1878.         uint sr = m68ki_init_exception();
  1879.         m68ki_stack_frame_0000(REG_PC, sr, vector);
  1880.         m68ki_jump_vector(vector);
  1881.  
  1882.         /* Use up some clock cycles */
  1883.         USE_CYCLES(CYC_EXCEPTION[vector]);
  1884. }
  1885.  
  1886. /* Exception for trace mode */
  1887. INLINE void m68ki_exception_trace(void)
  1888. {
  1889.         uint sr = m68ki_init_exception();
  1890.  
  1891.         if(CPU_TYPE_IS_010_LESS(CPU_TYPE))
  1892.         {
  1893.                 #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
  1894.                 if(CPU_TYPE_IS_000(CPU_TYPE))
  1895.                 {
  1896.                         CPU_INSTR_MODE = INSTRUCTION_NO;
  1897.                 }
  1898.                 #endif /* M68K_EMULATE_ADDRESS_ERROR */
  1899.                 m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_TRACE);
  1900.         }
  1901.         else
  1902.                 m68ki_stack_frame_0010(sr, EXCEPTION_TRACE);
  1903.  
  1904.         m68ki_jump_vector(EXCEPTION_TRACE);
  1905.  
  1906.         /* Trace nullifies a STOP instruction */
  1907.         CPU_STOPPED &= ~STOP_LEVEL_STOP;
  1908.  
  1909.         /* Use up some clock cycles */
  1910.         USE_CYCLES(CYC_EXCEPTION[EXCEPTION_TRACE]);
  1911. }
  1912.  
  1913. /* Exception for privilege violation */
  1914. INLINE void m68ki_exception_privilege_violation(void)
  1915. {
  1916.         uint sr = m68ki_init_exception();
  1917.  
  1918.         #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
  1919.         if(CPU_TYPE_IS_000(CPU_TYPE))
  1920.         {
  1921.                 CPU_INSTR_MODE = INSTRUCTION_NO;
  1922.         }
  1923.         #endif /* M68K_EMULATE_ADDRESS_ERROR */
  1924.  
  1925.         m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_PRIVILEGE_VIOLATION);
  1926.         m68ki_jump_vector(EXCEPTION_PRIVILEGE_VIOLATION);
  1927.  
  1928.         /* Use up some clock cycles and undo the instruction's cycles */
  1929.         USE_CYCLES(CYC_EXCEPTION[EXCEPTION_PRIVILEGE_VIOLATION] - CYC_INSTRUCTION[REG_IR]);
  1930. }
  1931.  
  1932. /* Exception for A-Line instructions */
  1933. INLINE void m68ki_exception_1010(void)
  1934. {
  1935.         uint sr;
  1936. #if M68K_LOG_1010_1111 == OPT_ON
  1937.         M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1010 instruction %04x (%s)\n",
  1938.                                          m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,
  1939.                                          m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));
  1940. #endif
  1941.  
  1942.         sr = m68ki_init_exception();
  1943.         m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_1010);
  1944.         m68ki_jump_vector(EXCEPTION_1010);
  1945.  
  1946.         /* Use up some clock cycles and undo the instruction's cycles */
  1947.         USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1010] - CYC_INSTRUCTION[REG_IR]);
  1948. }
  1949.  
  1950. /* Exception for F-Line instructions */
  1951. INLINE void m68ki_exception_1111(void)
  1952. {
  1953.         uint sr;
  1954.  
  1955. #if M68K_LOG_1010_1111 == OPT_ON
  1956.         M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1111 instruction %04x (%s)\n",
  1957.                                          m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,
  1958.                                          m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));
  1959. #endif
  1960.  
  1961.         sr = m68ki_init_exception();
  1962.         m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_1111);
  1963.         m68ki_jump_vector(EXCEPTION_1111);
  1964.  
  1965.         /* Use up some clock cycles and undo the instruction's cycles */
  1966.         USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1111] - CYC_INSTRUCTION[REG_IR]);
  1967. }
  1968.  
  1969. /* Exception for illegal instructions */
  1970. INLINE void m68ki_exception_illegal(void)
  1971. {
  1972.         uint sr;
  1973.  
  1974.         M68K_DO_LOG((M68K_LOG_FILEHANDLE "%s at %08x: illegal instruction %04x (%s)\n",
  1975.                                  m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,
  1976.                                  m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));
  1977.  
  1978.         sr = m68ki_init_exception();
  1979.  
  1980.         #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
  1981.         if(CPU_TYPE_IS_000(CPU_TYPE))
  1982.         {
  1983.                 CPU_INSTR_MODE = INSTRUCTION_NO;
  1984.         }
  1985.         #endif /* M68K_EMULATE_ADDRESS_ERROR */
  1986.  
  1987.         m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_ILLEGAL_INSTRUCTION);
  1988.         m68ki_jump_vector(EXCEPTION_ILLEGAL_INSTRUCTION);
  1989.  
  1990.         /* Use up some clock cycles and undo the instruction's cycles */
  1991.         USE_CYCLES(CYC_EXCEPTION[EXCEPTION_ILLEGAL_INSTRUCTION] - CYC_INSTRUCTION[REG_IR]);
  1992. }
  1993.  
  1994. /* Exception for format errror in RTE */
  1995. INLINE void m68ki_exception_format_error(void)
  1996. {
  1997.         uint sr = m68ki_init_exception();
  1998.         m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_FORMAT_ERROR);
  1999.         m68ki_jump_vector(EXCEPTION_FORMAT_ERROR);
  2000.  
  2001.         /* Use up some clock cycles and undo the instruction's cycles */
  2002.         USE_CYCLES(CYC_EXCEPTION[EXCEPTION_FORMAT_ERROR] - CYC_INSTRUCTION[REG_IR]);
  2003. }
  2004.  
  2005. /* Exception for address error */
  2006. INLINE void m68ki_exception_address_error(void)
  2007. {
  2008.         uint sr = m68ki_init_exception();
  2009.  
  2010.         /* If we were processing a bus error, address error, or reset,
  2011.      * this is a catastrophic failure.
  2012.      * Halt the CPU
  2013.      */
  2014.         if(CPU_RUN_MODE == RUN_MODE_BERR_AERR_RESET)
  2015.         {
  2016.                 m68k_read_memory_8(0x00ffff01);
  2017.                 CPU_STOPPED = STOP_LEVEL_HALT;
  2018.                 return;
  2019.         }
  2020.         CPU_RUN_MODE = RUN_MODE_BERR_AERR_RESET;
  2021.  
  2022.         /* Note: This is implemented for 68000 only! */
  2023.         m68ki_stack_frame_buserr(sr);
  2024.  
  2025.         m68ki_jump_vector(EXCEPTION_ADDRESS_ERROR);
  2026.  
  2027.         /* Use up some clock cycles and undo the instruction's cycles */
  2028.         USE_CYCLES(CYC_EXCEPTION[EXCEPTION_ADDRESS_ERROR] - CYC_INSTRUCTION[REG_IR]);
  2029. }
  2030.  
  2031.  
  2032. /* Service an interrupt request and start exception processing */
  2033. void m68ki_exception_interrupt(uint int_level)
  2034. {
  2035.         uint vector;
  2036.         uint sr;
  2037.         uint new_pc;
  2038.  
  2039.         #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
  2040.         if(CPU_TYPE_IS_000(CPU_TYPE))
  2041.         {
  2042.                 CPU_INSTR_MODE = INSTRUCTION_NO;
  2043.         }
  2044.         #endif /* M68K_EMULATE_ADDRESS_ERROR */
  2045.  
  2046.         /* Turn off the stopped state */
  2047.         CPU_STOPPED &= ~STOP_LEVEL_STOP;
  2048.  
  2049.         /* If we are halted, don't do anything */
  2050.         if(CPU_STOPPED)
  2051.                 return;
  2052.  
  2053.         /* Acknowledge the interrupt */
  2054.         vector = m68ki_int_ack(int_level);
  2055.  
  2056.         /* Get the interrupt vector */
  2057.         if(vector == M68K_INT_ACK_AUTOVECTOR)
  2058.                 /* Use the autovectors.  This is the most commonly used implementation */
  2059.                 vector = EXCEPTION_INTERRUPT_AUTOVECTOR+int_level;
  2060.         else if(vector == M68K_INT_ACK_SPURIOUS)
  2061.                 /* Called if no devices respond to the interrupt acknowledge */
  2062.                 vector = EXCEPTION_SPURIOUS_INTERRUPT;
  2063.         else if(vector > 255)
  2064.         {
  2065.                 M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: Interrupt acknowledge returned invalid vector $%x\n",
  2066.                                  m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PC), vector));
  2067.                 return;
  2068.         }
  2069.  
  2070.         /* Start exception processing */
  2071.         sr = m68ki_init_exception();
  2072.  
  2073.         /* Set the interrupt mask to the level of the one being serviced */
  2074.         FLAG_INT_MASK = int_level<<8;
  2075.  
  2076.         /* Get the new PC */
  2077.         new_pc = m68ki_read_data_32((vector<<2) + REG_VBR);
  2078.  
  2079.         /* If vector is uninitialized, call the uninitialized interrupt vector */
  2080.         if(new_pc == 0)
  2081.                 new_pc = m68ki_read_data_32((EXCEPTION_UNINITIALIZED_INTERRUPT<<2) + REG_VBR);
  2082.  
  2083.         /* Generate a stack frame */
  2084.         m68ki_stack_frame_0000(REG_PC, sr, vector);
  2085.         if(FLAG_M && CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))
  2086.         {
  2087.                 /* Create throwaway frame */
  2088.                 m68ki_set_sm_flag(FLAG_S);      /* clear M */
  2089.                 sr |= 0x2000; /* Same as SR in master stack frame except S is forced high */
  2090.                 m68ki_stack_frame_0001(REG_PC, sr, vector);
  2091.         }
  2092.  
  2093.         m68ki_jump(new_pc);
  2094.  
  2095.         /* Defer cycle counting until later */
  2096.         CPU_INT_CYCLES += CYC_EXCEPTION[vector];
  2097.  
  2098. #if !M68K_EMULATE_INT_ACK
  2099.         /* Automatically clear IRQ if we are not using an acknowledge scheme */
  2100.         CPU_INT_LEVEL = 0;
  2101. #endif /* M68K_EMULATE_INT_ACK */
  2102. }
  2103.  
  2104.  
  2105. /* ASG: Check for interrupts */
  2106. INLINE void m68ki_check_interrupts(void)
  2107. {
  2108.         if(CPU_INT_LEVEL > FLAG_INT_MASK)
  2109.                 m68ki_exception_interrupt(CPU_INT_LEVEL>>8);
  2110. }
  2111.  
  2112.  
  2113.  
  2114. /* ======================================================================== */
  2115. /* ============================== END OF FILE ============================= */
  2116. /* ======================================================================== */
  2117.  
  2118. #endif /* M68KCPU__HEADER */
  2119.