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- #include <stdio.h>
- /* ======================================================================== */
- /* ========================= LICENSING & COPYRIGHT ======================== */
- /* ======================================================================== */
- /*
- * MUSASHI
- * Version 3.31
- *
- * A portable Motorola M680x0 processor emulation engine.
- * Copyright 1998-2007 Karl Stenerud. All rights reserved.
- *
- * This code may be freely used for non-commercial purposes as long as this
- * copyright notice remains unaltered in the source code and any binary files
- * containing this code in compiled form.
- *
- * All other lisencing terms must be negotiated with the author
- * (Karl Stenerud).
- *
- * The latest version of this code can be obtained at:
- * http://kstenerud.cjb.net
- */
- #ifndef M68KCPU__HEADER
- #define M68KCPU__HEADER
- // notaz: something's missing this
- #include <stdint.h>
- typedef uint64_t UINT64;
- typedef uint32_t UINT32;
- typedef uint16_t UINT16;
- typedef uint8_t UINT8;
- #include "m68k.h"
- #include <limits.h>
- #if M68K_EMULATE_ADDRESS_ERROR
- #include <setjmp.h>
- #endif /* M68K_EMULATE_ADDRESS_ERROR */
- /* ======================================================================== */
- /* ==================== ARCHITECTURE-DEPENDANT DEFINES ==================== */
- /* ======================================================================== */
- /* Check for > 32bit sizes */
- #if UINT_MAX > 0xffffffff
- #define M68K_INT_GT_32_BIT 1
- #else
- #define M68K_INT_GT_32_BIT 0
- #endif
- /* Data types used in this emulation core */
- #undef sint8
- #undef sint16
- #undef sint32
- #undef sint64
- #undef uint8
- #undef uint16
- #undef uint32
- #undef uint64
- #undef sint
- #undef uint
- #define sint8 signed char /* ASG: changed from char to signed char */
- #define sint16 signed short
- #define sint32 signed int /* AWJ: changed from long to int */
- #define uint8 unsigned char
- #define uint16 unsigned short
- #define uint32 unsigned int /* AWJ: changed from long to int */
- /* signed and unsigned int must be at least 32 bits wide */
- #define sint signed int
- #define uint unsigned int
- #if M68K_USE_64_BIT
- #define sint64 signed long long
- #define uint64 unsigned long long
- #else
- #define sint64 sint32
- #define uint64 uint32
- #endif /* M68K_USE_64_BIT */
- /* Allow for architectures that don't have 8-bit sizes */
- #if UCHAR_MAX == 0xff
- #define MAKE_INT_8(A) (sint8)(A)
- #else
- #undef sint8
- #define sint8 signed int
- #undef uint8
- #define uint8 unsigned int
- INLINE sint MAKE_INT_8(uint value)
- {
- return (value & 0x80) ? value | ~0xff : value & 0xff;
- }
- #endif /* UCHAR_MAX == 0xff */
- /* Allow for architectures that don't have 16-bit sizes */
- #if USHRT_MAX == 0xffff
- #define MAKE_INT_16(A) (sint16)(A)
- #else
- #undef sint16
- #define sint16 signed int
- #undef uint16
- #define uint16 unsigned int
- INLINE sint MAKE_INT_16(uint value)
- {
- return (value & 0x8000) ? value | ~0xffff : value & 0xffff;
- }
- #endif /* USHRT_MAX == 0xffff */
- /* Allow for architectures that don't have 32-bit sizes */
- #if UINT_MAX == 0xffffffff
- #define MAKE_INT_32(A) (sint32)(A)
- #else
- #undef sint32
- #define sint32 signed int
- #undef uint32
- #define uint32 unsigned int
- INLINE sint MAKE_INT_32(uint value)
- {
- return (value & 0x80000000) ? value | ~0xffffffff : value & 0xffffffff;
- }
- #endif /* UINT_MAX == 0xffffffff */
- /* ======================================================================== */
- /* ============================ GENERAL DEFINES =========================== */
- /* ======================================================================== */
- /* Exception Vectors handled by emulation */
- #define EXCEPTION_BUS_ERROR 2 /* This one is not emulated! */
- #define EXCEPTION_ADDRESS_ERROR 3 /* This one is partially emulated (doesn't stack a proper frame yet) */
- #undef EXCEPTION_ILLEGAL_INSTRUCTION
- #define EXCEPTION_ILLEGAL_INSTRUCTION 4
- #define EXCEPTION_ZERO_DIVIDE 5
- #define EXCEPTION_CHK 6
- #define EXCEPTION_TRAPV 7
- #define EXCEPTION_PRIVILEGE_VIOLATION 8
- #define EXCEPTION_TRACE 9
- #define EXCEPTION_1010 10
- #define EXCEPTION_1111 11
- #define EXCEPTION_FORMAT_ERROR 14
- #define EXCEPTION_UNINITIALIZED_INTERRUPT 15
- #define EXCEPTION_SPURIOUS_INTERRUPT 24
- #define EXCEPTION_INTERRUPT_AUTOVECTOR 24
- #define EXCEPTION_TRAP_BASE 32
- /* Function codes set by CPU during data/address bus activity */
- #define FUNCTION_CODE_USER_DATA 1
- #define FUNCTION_CODE_USER_PROGRAM 2
- #define FUNCTION_CODE_SUPERVISOR_DATA 5
- #define FUNCTION_CODE_SUPERVISOR_PROGRAM 6
- #define FUNCTION_CODE_CPU_SPACE 7
- /* CPU types for deciding what to emulate */
- #define CPU_TYPE_000 1
- #define CPU_TYPE_008 2
- #define CPU_TYPE_010 4
- #define CPU_TYPE_EC020 8
- #define CPU_TYPE_020 16
- #define CPU_TYPE_040 32
- /* Different ways to stop the CPU */
- #define STOP_LEVEL_STOP 1
- #define STOP_LEVEL_HALT 2
- /* Used for 68000 address error processing */
- #define INSTRUCTION_YES 0
- #define INSTRUCTION_NO 0x08
- #define MODE_READ 0x10
- #define MODE_WRITE 0
- #define RUN_MODE_NORMAL 0
- #define RUN_MODE_BERR_AERR_RESET 1
- #ifndef NULL
- #define NULL ((void*)0)
- #endif
- /* ======================================================================== */
- /* ================================ MACROS ================================ */
- /* ======================================================================== */
- /* ---------------------------- General Macros ---------------------------- */
- /* Bit Isolation Macros */
- #define BIT_0(A) ((A) & 0x00000001)
- #define BIT_1(A) ((A) & 0x00000002)
- #define BIT_2(A) ((A) & 0x00000004)
- #define BIT_3(A) ((A) & 0x00000008)
- #define BIT_4(A) ((A) & 0x00000010)
- #define BIT_5(A) ((A) & 0x00000020)
- #define BIT_6(A) ((A) & 0x00000040)
- #define BIT_7(A) ((A) & 0x00000080)
- #define BIT_8(A) ((A) & 0x00000100)
- #define BIT_9(A) ((A) & 0x00000200)
- #define BIT_A(A) ((A) & 0x00000400)
- #define BIT_B(A) ((A) & 0x00000800)
- #define BIT_C(A) ((A) & 0x00001000)
- #define BIT_D(A) ((A) & 0x00002000)
- #define BIT_E(A) ((A) & 0x00004000)
- #define BIT_F(A) ((A) & 0x00008000)
- #define BIT_10(A) ((A) & 0x00010000)
- #define BIT_11(A) ((A) & 0x00020000)
- #define BIT_12(A) ((A) & 0x00040000)
- #define BIT_13(A) ((A) & 0x00080000)
- #define BIT_14(A) ((A) & 0x00100000)
- #define BIT_15(A) ((A) & 0x00200000)
- #define BIT_16(A) ((A) & 0x00400000)
- #define BIT_17(A) ((A) & 0x00800000)
- #define BIT_18(A) ((A) & 0x01000000)
- #define BIT_19(A) ((A) & 0x02000000)
- #define BIT_1A(A) ((A) & 0x04000000)
- #define BIT_1B(A) ((A) & 0x08000000)
- #define BIT_1C(A) ((A) & 0x10000000)
- #define BIT_1D(A) ((A) & 0x20000000)
- #define BIT_1E(A) ((A) & 0x40000000)
- #define BIT_1F(A) ((A) & 0x80000000)
- /* Get the most significant bit for specific sizes */
- #define GET_MSB_8(A) ((A) & 0x80)
- #define GET_MSB_9(A) ((A) & 0x100)
- #define GET_MSB_16(A) ((A) & 0x8000)
- #define GET_MSB_17(A) ((A) & 0x10000)
- #define GET_MSB_32(A) ((A) & 0x80000000)
- #if M68K_USE_64_BIT
- #define GET_MSB_33(A) ((A) & 0x100000000)
- #endif /* M68K_USE_64_BIT */
- /* Isolate nibbles */
- #define LOW_NIBBLE(A) ((A) & 0x0f)
- #define HIGH_NIBBLE(A) ((A) & 0xf0)
- /* These are used to isolate 8, 16, and 32 bit sizes */
- #define MASK_OUT_ABOVE_2(A) ((A) & 3)
- #define MASK_OUT_ABOVE_8(A) ((A) & 0xff)
- #define MASK_OUT_ABOVE_16(A) ((A) & 0xffff)
- #define MASK_OUT_BELOW_2(A) ((A) & ~3)
- #define MASK_OUT_BELOW_8(A) ((A) & ~0xff)
- #define MASK_OUT_BELOW_16(A) ((A) & ~0xffff)
- /* No need to mask if we are 32 bit */
- #if M68K_INT_GT_32_BIT || M68K_USE_64_BIT
- #define MASK_OUT_ABOVE_32(A) ((A) & 0xffffffff)
- #define MASK_OUT_BELOW_32(A) ((A) & ~0xffffffff)
- #else
- #define MASK_OUT_ABOVE_32(A) (A)
- #define MASK_OUT_BELOW_32(A) 0
- #endif /* M68K_INT_GT_32_BIT || M68K_USE_64_BIT */
- /* Simulate address lines of 68k family */
- #define ADDRESS_68K(A) ((A)&CPU_ADDRESS_MASK)
- /* Shift & Rotate Macros. */
- #define LSL(A, C) ((A) << (C))
- #define LSR(A, C) ((A) >> (C))
- /* Some > 32-bit optimizations */
- #if M68K_INT_GT_32_BIT
- /* Shift left and right */
- #define LSR_32(A, C) ((A) >> (C))
- #define LSL_32(A, C) ((A) << (C))
- #else
- /* We have to do this because the morons at ANSI decided that shifts
- * by >= data size are undefined.
- */
- #define LSR_32(A, C) ((C) < 32 ? (A) >> (C) : 0)
- #define LSL_32(A, C) ((C) < 32 ? (A) << (C) : 0)
- #endif /* M68K_INT_GT_32_BIT */
- #if M68K_USE_64_BIT
- #define LSL_32_64(A, C) ((A) << (C))
- #define LSR_32_64(A, C) ((A) >> (C))
- #define ROL_33_64(A, C) (LSL_32_64(A, C) | LSR_32_64(A, 33-(C)))
- #define ROR_33_64(A, C) (LSR_32_64(A, C) | LSL_32_64(A, 33-(C)))
- #endif /* M68K_USE_64_BIT */
- #define ROL_8(A, C) MASK_OUT_ABOVE_8(LSL(A, C) | LSR(A, 8-(C)))
- #define ROL_9(A, C) (LSL(A, C) | LSR(A, 9-(C)))
- #define ROL_16(A, C) MASK_OUT_ABOVE_16(LSL(A, C) | LSR(A, 16-(C)))
- #define ROL_17(A, C) (LSL(A, C) | LSR(A, 17-(C)))
- #define ROL_32(A, C) MASK_OUT_ABOVE_32(LSL_32(A, C) | LSR_32(A, 32-(C)))
- #define ROL_33(A, C) (LSL_32(A, C) | LSR_32(A, 33-(C)))
- #define ROR_8(A, C) MASK_OUT_ABOVE_8(LSR(A, C) | LSL(A, 8-(C)))
- #define ROR_9(A, C) (LSR(A, C) | LSL(A, 9-(C)))
- #define ROR_16(A, C) MASK_OUT_ABOVE_16(LSR(A, C) | LSL(A, 16-(C)))
- #define ROR_17(A, C) (LSR(A, C) | LSL(A, 17-(C)))
- #define ROR_32(A, C) MASK_OUT_ABOVE_32(LSR_32(A, C) | LSL_32(A, 32-(C)))
- #define ROR_33(A, C) (LSR_32(A, C) | LSL_32(A, 33-(C)))
- /* ------------------------------ CPU Access ------------------------------ */
- /* Access the CPU registers */
- #define CPU_TYPE m68ki_cpu.cpu_type
- #define REG_DA m68ki_cpu.dar /* easy access to data and address regs */
- #define REG_D m68ki_cpu.dar
- #define REG_A (m68ki_cpu.dar+8)
- #define REG_PPC m68ki_cpu.ppc
- #define REG_PC m68ki_cpu.pc
- #define REG_SP_BASE m68ki_cpu.sp
- #define REG_USP m68ki_cpu.sp[0]
- #define REG_ISP m68ki_cpu.sp[4]
- #define REG_MSP m68ki_cpu.sp[6]
- #define REG_SP m68ki_cpu.dar[15]
- #define REG_VBR m68ki_cpu.vbr
- #define REG_SFC m68ki_cpu.sfc
- #define REG_DFC m68ki_cpu.dfc
- #define REG_CACR m68ki_cpu.cacr
- #define REG_CAAR m68ki_cpu.caar
- #define REG_IR m68ki_cpu.ir
- #define REG_FP m68ki_cpu.fpr
- #define REG_FPCR m68ki_cpu.fpcr
- #define REG_FPSR m68ki_cpu.fpsr
- #define REG_FPIAR m68ki_cpu.fpiar
- #define FLAG_T1 m68ki_cpu.t1_flag
- #define FLAG_T0 m68ki_cpu.t0_flag
- #define FLAG_S m68ki_cpu.s_flag
- #define FLAG_M m68ki_cpu.m_flag
- #define FLAG_X m68ki_cpu.x_flag
- #define FLAG_N m68ki_cpu.n_flag
- #define FLAG_Z m68ki_cpu.not_z_flag
- #define FLAG_V m68ki_cpu.v_flag
- #define FLAG_C m68ki_cpu.c_flag
- #define FLAG_INT_MASK m68ki_cpu.int_mask
- #define CPU_INT_LEVEL m68ki_cpu.int_level /* ASG: changed from CPU_INTS_PENDING */
- #define CPU_INT_CYCLES m68ki_cpu.int_cycles /* ASG */
- #define CPU_STOPPED m68ki_cpu.stopped
- #define CPU_PREF_ADDR m68ki_cpu.pref_addr
- #define CPU_PREF_DATA m68ki_cpu.pref_data
- #define CPU_ADDRESS_MASK m68ki_cpu.address_mask
- #define CPU_SR_MASK m68ki_cpu.sr_mask
- #define CPU_INSTR_MODE m68ki_cpu.instr_mode
- #define CPU_RUN_MODE m68ki_cpu.run_mode
- #define CYC_INSTRUCTION m68ki_cpu.cyc_instruction
- #define CYC_EXCEPTION m68ki_cpu.cyc_exception
- #define CYC_BCC_NOTAKE_B m68ki_cpu.cyc_bcc_notake_b
- #define CYC_BCC_NOTAKE_W m68ki_cpu.cyc_bcc_notake_w
- #define CYC_DBCC_F_NOEXP m68ki_cpu.cyc_dbcc_f_noexp
- #define CYC_DBCC_F_EXP m68ki_cpu.cyc_dbcc_f_exp
- #define CYC_SCC_R_TRUE m68ki_cpu.cyc_scc_r_true
- #define CYC_MOVEM_W m68ki_cpu.cyc_movem_w
- #define CYC_MOVEM_L m68ki_cpu.cyc_movem_l
- #define CYC_SHIFT m68ki_cpu.cyc_shift
- #define CYC_RESET m68ki_cpu.cyc_reset
- #define CALLBACK_INT_ACK m68ki_cpu.int_ack_callback
- #define CALLBACK_BKPT_ACK m68ki_cpu.bkpt_ack_callback
- #define CALLBACK_RESET_INSTR m68ki_cpu.reset_instr_callback
- #define CALLBACK_CMPILD_INSTR m68ki_cpu.cmpild_instr_callback
- #define CALLBACK_RTE_INSTR m68ki_cpu.rte_instr_callback
- #define CALLBACK_TAS_INSTR m68ki_cpu.tas_instr_callback
- #define CALLBACK_PC_CHANGED m68ki_cpu.pc_changed_callback
- #define CALLBACK_SET_FC m68ki_cpu.set_fc_callback
- #define CALLBACK_INSTR_HOOK m68ki_cpu.instr_hook_callback
- /* ----------------------------- Configuration ---------------------------- */
- /* These defines are dependant on the configuration defines in m68kconf.h */
- /* Disable certain comparisons if we're not using all CPU types */
- #if M68K_EMULATE_040
- #define CPU_TYPE_IS_040_PLUS(A) ((A) & CPU_TYPE_040)
- #define CPU_TYPE_IS_040_LESS(A) 1
- #else
- #define CPU_TYPE_IS_040_PLUS(A) 0
- #define CPU_TYPE_IS_040_LESS(A) 1
- #endif
- #if M68K_EMULATE_020
- #define CPU_TYPE_IS_020_PLUS(A) ((A) & (CPU_TYPE_020 | CPU_TYPE_040))
- #define CPU_TYPE_IS_020_LESS(A) 1
- #else
- #define CPU_TYPE_IS_020_PLUS(A) 0
- #define CPU_TYPE_IS_020_LESS(A) 1
- #endif
- #if M68K_EMULATE_EC020
- #define CPU_TYPE_IS_EC020_PLUS(A) ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020 | CPU_TYPE_040))
- #define CPU_TYPE_IS_EC020_LESS(A) ((A) & (CPU_TYPE_000 | CPU_TYPE_008 | CPU_TYPE_010 | CPU_TYPE_EC020))
- #else
- #define CPU_TYPE_IS_EC020_PLUS(A) CPU_TYPE_IS_020_PLUS(A)
- #define CPU_TYPE_IS_EC020_LESS(A) CPU_TYPE_IS_020_LESS(A)
- #endif
- #if M68K_EMULATE_010
- #define CPU_TYPE_IS_010(A) ((A) == CPU_TYPE_010)
- #define CPU_TYPE_IS_010_PLUS(A) ((A) & (CPU_TYPE_010 | CPU_TYPE_EC020 | CPU_TYPE_020 | CPU_TYPE_040))
- #define CPU_TYPE_IS_010_LESS(A) ((A) & (CPU_TYPE_000 | CPU_TYPE_008 | CPU_TYPE_010))
- #else
- #define CPU_TYPE_IS_010(A) 0
- #define CPU_TYPE_IS_010_PLUS(A) CPU_TYPE_IS_EC020_PLUS(A)
- #define CPU_TYPE_IS_010_LESS(A) CPU_TYPE_IS_EC020_LESS(A)
- #endif
- #if M68K_EMULATE_020 || M68K_EMULATE_EC020
- #define CPU_TYPE_IS_020_VARIANT(A) ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020))
- #else
- #define CPU_TYPE_IS_020_VARIANT(A) 0
- #endif
- #if M68K_EMULATE_040 || M68K_EMULATE_020 || M68K_EMULATE_EC020 || M68K_EMULATE_010
- #define CPU_TYPE_IS_000(A) ((A) == CPU_TYPE_000 || (A) == CPU_TYPE_008)
- #else
- #define CPU_TYPE_IS_000(A) 1
- #endif
- #if !M68K_SEPARATE_READS
- #define m68k_read_immediate_16(A) m68ki_read_program_16(A)
- #define m68k_read_immediate_32(A) m68ki_read_program_32(A)
- #define m68k_read_pcrelative_8(A) m68ki_read_program_8(A)
- #define m68k_read_pcrelative_16(A) m68ki_read_program_16(A)
- #define m68k_read_pcrelative_32(A) m68ki_read_program_32(A)
- #endif /* M68K_SEPARATE_READS */
- /* Enable or disable callback functions */
- #if M68K_EMULATE_INT_ACK
- #if M68K_EMULATE_INT_ACK == OPT_SPECIFY_HANDLER
- #define m68ki_int_ack(A) M68K_INT_ACK_CALLBACK(A)
- #else
- #define m68ki_int_ack(A) CALLBACK_INT_ACK(A)
- #endif
- #else
- /* Default action is to used autovector mode, which is most common */
- #define m68ki_int_ack(A) M68K_INT_ACK_AUTOVECTOR
- #endif /* M68K_EMULATE_INT_ACK */
- #if M68K_EMULATE_BKPT_ACK
- #if M68K_EMULATE_BKPT_ACK == OPT_SPECIFY_HANDLER
- #define m68ki_bkpt_ack(A) M68K_BKPT_ACK_CALLBACK(A)
- #else
- #define m68ki_bkpt_ack(A) CALLBACK_BKPT_ACK(A)
- #endif
- #else
- #define m68ki_bkpt_ack(A)
- #endif /* M68K_EMULATE_BKPT_ACK */
- #if M68K_EMULATE_RESET
- #if M68K_EMULATE_RESET == OPT_SPECIFY_HANDLER
- #define m68ki_output_reset() M68K_RESET_CALLBACK()
- #else
- #define m68ki_output_reset() CALLBACK_RESET_INSTR()
- #endif
- #else
- #define m68ki_output_reset()
- #endif /* M68K_EMULATE_RESET */
- #if M68K_CMPILD_HAS_CALLBACK
- #if M68K_CMPILD_HAS_CALLBACK == OPT_SPECIFY_HANDLER
- #define m68ki_cmpild_callback(v,r) M68K_CMPILD_CALLBACK(v,r)
- #else
- #define m68ki_cmpild_callback(v,r) CALLBACK_CMPILD_INSTR(v,r)
- #endif
- #else
- #define m68ki_cmpild_callback(v,r)
- #endif /* M68K_CMPILD_HAS_CALLBACK */
- #if M68K_RTE_HAS_CALLBACK
- #if M68K_RTE_HAS_CALLBACK == OPT_SPECIFY_HANDLER
- #define m68ki_rte_callback() M68K_RTE_CALLBACK()
- #else
- #define m68ki_rte_callback() CALLBACK_RTE_INSTR()
- #endif
- #else
- #define m68ki_rte_callback()
- #endif /* M68K_RTE_HAS_CALLBACK */
- #if M68K_TAS_HAS_CALLBACK
- #if M68K_TAS_HAS_CALLBACK == OPT_SPECIFY_HANDLER
- #define m68ki_tas_callback() M68K_TAS_CALLBACK()
- #else
- #define m68ki_tas_callback() CALLBACK_TAS_INSTR()
- #endif
- #else
- #define m68ki_tas_callback()
- #endif /* M68K_TAS_HAS_CALLBACK */
- #if M68K_INSTRUCTION_HOOK
- #if M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER
- #define m68ki_instr_hook() M68K_INSTRUCTION_CALLBACK()
- #else
- #define m68ki_instr_hook() CALLBACK_INSTR_HOOK()
- #endif
- #else
- #define m68ki_instr_hook()
- #endif /* M68K_INSTRUCTION_HOOK */
- #if M68K_MONITOR_PC
- #if M68K_MONITOR_PC == OPT_SPECIFY_HANDLER
- #define m68ki_pc_changed(A) M68K_SET_PC_CALLBACK(ADDRESS_68K(A))
- #else
- #define m68ki_pc_changed(A) CALLBACK_PC_CHANGED(ADDRESS_68K(A))
- #endif
- #else
- #define m68ki_pc_changed(A)
- #endif /* M68K_MONITOR_PC */
- /* Enable or disable function code emulation */
- #if M68K_EMULATE_FC
- #if M68K_EMULATE_FC == OPT_SPECIFY_HANDLER
- #define m68ki_set_fc(A) M68K_SET_FC_CALLBACK(A)
- #else
- #define m68ki_set_fc(A) CALLBACK_SET_FC(A)
- #endif
- #define m68ki_use_data_space() m68ki_address_space = FUNCTION_CODE_USER_DATA
- #define m68ki_use_program_space() m68ki_address_space = FUNCTION_CODE_USER_PROGRAM
- #define m68ki_get_address_space() m68ki_address_space
- #else
- #define m68ki_set_fc(A)
- #define m68ki_use_data_space()
- #define m68ki_use_program_space()
- #define m68ki_get_address_space() FUNCTION_CODE_USER_DATA
- #endif /* M68K_EMULATE_FC */
- /* Enable or disable trace emulation */
- #if M68K_EMULATE_TRACE
- /* Initiates trace checking before each instruction (t1) */
- #define m68ki_trace_t1() m68ki_tracing = FLAG_T1
- /* adds t0 to trace checking if we encounter change of flow */
- #define m68ki_trace_t0() m68ki_tracing |= FLAG_T0
- /* Clear all tracing */
- #define m68ki_clear_trace() m68ki_tracing = 0
- /* Cause a trace exception if we are tracing */
- #define m68ki_exception_if_trace() if(m68ki_tracing) m68ki_exception_trace()
- #else
- #define m68ki_trace_t1()
- #define m68ki_trace_t0()
- #define m68ki_clear_trace()
- #define m68ki_exception_if_trace()
- #endif /* M68K_EMULATE_TRACE */
- /* Address error */
- #if M68K_EMULATE_ADDRESS_ERROR
- #include <setjmp.h>
- extern jmp_buf m68ki_aerr_trap;
- #define m68ki_set_address_error_trap() \
- if(setjmp(m68ki_aerr_trap) != 0) \
- { \
- m68ki_exception_address_error(); \
- if(CPU_STOPPED) \
- { \
- SET_CYCLES(0); \
- CPU_INT_CYCLES = 0; \
- return m68ki_initial_cycles; \
- } \
- }
- #define m68ki_check_address_error(ADDR, WRITE_MODE, FC) \
- if((ADDR)&1) \
- { \
- m68ki_aerr_address = ADDR; \
- m68ki_aerr_write_mode = WRITE_MODE; \
- m68ki_aerr_fc = FC; \
- longjmp(m68ki_aerr_trap, 1); \
- }
- #define m68ki_check_address_error_010_less(ADDR, WRITE_MODE, FC) \
- if (CPU_TYPE_IS_010_LESS(CPU_TYPE)) \
- { \
- m68ki_check_address_error(ADDR, WRITE_MODE, FC) \
- }
- #else
- #define m68ki_set_address_error_trap()
- #define m68ki_check_address_error(ADDR, WRITE_MODE, FC)
- #define m68ki_check_address_error_010_less(ADDR, WRITE_MODE, FC)
- #endif /* M68K_ADDRESS_ERROR */
- /* Logging */
- #if M68K_LOG_ENABLE
- #include <stdio.h>
- extern FILE* M68K_LOG_FILEHANDLE
- extern char* m68ki_cpu_names[];
- #define M68K_DO_LOG(A) if(M68K_LOG_FILEHANDLE) fprintf A
- #if M68K_LOG_1010_1111
- #define M68K_DO_LOG_EMU(A) if(M68K_LOG_FILEHANDLE) fprintf A
- #else
- #define M68K_DO_LOG_EMU(A)
- #endif
- #else
- #define M68K_DO_LOG(A)
- #define M68K_DO_LOG_EMU(A)
- #endif
- /* -------------------------- EA / Operand Access ------------------------- */
- /*
- * The general instruction format follows this pattern:
- * .... XXX. .... .YYY
- * where XXX is register X and YYY is register Y
- */
- /* Data Register Isolation */
- #define DX (REG_D[(REG_IR >> 9) & 7])
- #define DY (REG_D[REG_IR & 7])
- /* Address Register Isolation */
- #define AX (REG_A[(REG_IR >> 9) & 7])
- #define AY (REG_A[REG_IR & 7])
- /* Effective Address Calculations */
- #define EA_AY_AI_8() AY /* address register indirect */
- #define EA_AY_AI_16() EA_AY_AI_8()
- #define EA_AY_AI_32() EA_AY_AI_8()
- #define EA_AY_PI_8() (AY++) /* postincrement (size = byte) */
- #define EA_AY_PI_16() ((AY+=2)-2) /* postincrement (size = word) */
- #define EA_AY_PI_32() ((AY+=4)-4) /* postincrement (size = long) */
- #define EA_AY_PD_8() (--AY) /* predecrement (size = byte) */
- #define EA_AY_PD_16() (AY-=2) /* predecrement (size = word) */
- #define EA_AY_PD_32() (AY-=4) /* predecrement (size = long) */
- #define EA_AY_DI_8() (AY+MAKE_INT_16(m68ki_read_imm_16())) /* displacement */
- #define EA_AY_DI_16() EA_AY_DI_8()
- #define EA_AY_DI_32() EA_AY_DI_8()
- #define EA_AY_IX_8() m68ki_get_ea_ix(AY) /* indirect + index */
- #define EA_AY_IX_16() EA_AY_IX_8()
- #define EA_AY_IX_32() EA_AY_IX_8()
- #define EA_AX_AI_8() AX
- #define EA_AX_AI_16() EA_AX_AI_8()
- #define EA_AX_AI_32() EA_AX_AI_8()
- #define EA_AX_PI_8() (AX++)
- #define EA_AX_PI_16() ((AX+=2)-2)
- #define EA_AX_PI_32() ((AX+=4)-4)
- #define EA_AX_PD_8() (--AX)
- #define EA_AX_PD_16() (AX-=2)
- #define EA_AX_PD_32() (AX-=4)
- #define EA_AX_DI_8() (AX+MAKE_INT_16(m68ki_read_imm_16()))
- #define EA_AX_DI_16() EA_AX_DI_8()
- #define EA_AX_DI_32() EA_AX_DI_8()
- #define EA_AX_IX_8() m68ki_get_ea_ix(AX)
- #define EA_AX_IX_16() EA_AX_IX_8()
- #define EA_AX_IX_32() EA_AX_IX_8()
- #define EA_A7_PI_8() ((REG_A[7]+=2)-2)
- #define EA_A7_PD_8() (REG_A[7]-=2)
- #define EA_AW_8() MAKE_INT_16(m68ki_read_imm_16()) /* absolute word */
- #define EA_AW_16() EA_AW_8()
- #define EA_AW_32() EA_AW_8()
- #define EA_AL_8() m68ki_read_imm_32() /* absolute long */
- #define EA_AL_16() EA_AL_8()
- #define EA_AL_32() EA_AL_8()
- #define EA_PCDI_8() m68ki_get_ea_pcdi() /* pc indirect + displacement */
- #define EA_PCDI_16() EA_PCDI_8()
- #define EA_PCDI_32() EA_PCDI_8()
- #define EA_PCIX_8() m68ki_get_ea_pcix() /* pc indirect + index */
- #define EA_PCIX_16() EA_PCIX_8()
- #define EA_PCIX_32() EA_PCIX_8()
- #define OPER_I_8() m68ki_read_imm_8()
- #define OPER_I_16() m68ki_read_imm_16()
- #define OPER_I_32() m68ki_read_imm_32()
- /* --------------------------- Status Register ---------------------------- */
- /* Flag Calculation Macros */
- #define CFLAG_8(A) (A)
- #define CFLAG_16(A) ((A)>>8)
- #if M68K_INT_GT_32_BIT
- #define CFLAG_ADD_32(S, D, R) ((R)>>24)
- #define CFLAG_SUB_32(S, D, R) ((R)>>24)
- #else
- #define CFLAG_ADD_32(S, D, R) (((S & D) | (~R & (S | D)))>>23)
- #define CFLAG_SUB_32(S, D, R) (((S & R) | (~D & (S | R)))>>23)
- #endif /* M68K_INT_GT_32_BIT */
- #define VFLAG_ADD_8(S, D, R) ((S^R) & (D^R))
- #define VFLAG_ADD_16(S, D, R) (((S^R) & (D^R))>>8)
- #define VFLAG_ADD_32(S, D, R) (((S^R) & (D^R))>>24)
- #define VFLAG_SUB_8(S, D, R) ((S^D) & (R^D))
- #define VFLAG_SUB_16(S, D, R) (((S^D) & (R^D))>>8)
- #define VFLAG_SUB_32(S, D, R) (((S^D) & (R^D))>>24)
- #define NFLAG_8(A) (A)
- #define NFLAG_16(A) ((A)>>8)
- #define NFLAG_32(A) ((A)>>24)
- #define NFLAG_64(A) ((A)>>56)
- #define ZFLAG_8(A) MASK_OUT_ABOVE_8(A)
- #define ZFLAG_16(A) MASK_OUT_ABOVE_16(A)
- #define ZFLAG_32(A) MASK_OUT_ABOVE_32(A)
- /* Flag values */
- #define NFLAG_SET 0x80
- #define NFLAG_CLEAR 0
- #define CFLAG_SET 0x100
- #define CFLAG_CLEAR 0
- #define XFLAG_SET 0x100
- #define XFLAG_CLEAR 0
- #define VFLAG_SET 0x80
- #define VFLAG_CLEAR 0
- #define ZFLAG_SET 0
- #define ZFLAG_CLEAR 0xffffffff
- #define SFLAG_SET 4
- #define SFLAG_CLEAR 0
- #define MFLAG_SET 2
- #define MFLAG_CLEAR 0
- /* Turn flag values into 1 or 0 */
- #define XFLAG_AS_1() ((FLAG_X>>8)&1)
- #define NFLAG_AS_1() ((FLAG_N>>7)&1)
- #define VFLAG_AS_1() ((FLAG_V>>7)&1)
- #define ZFLAG_AS_1() (!FLAG_Z)
- #define CFLAG_AS_1() ((FLAG_C>>8)&1)
- /* Conditions */
- #define COND_CS() (FLAG_C&0x100)
- #define COND_CC() (!COND_CS())
- #define COND_VS() (FLAG_V&0x80)
- #define COND_VC() (!COND_VS())
- #define COND_NE() FLAG_Z
- #define COND_EQ() (!COND_NE())
- #define COND_MI() (FLAG_N&0x80)
- #define COND_PL() (!COND_MI())
- #define COND_LT() ((FLAG_N^FLAG_V)&0x80)
- #define COND_GE() (!COND_LT())
- #define COND_HI() (COND_CC() && COND_NE())
- #define COND_LS() (COND_CS() || COND_EQ())
- #define COND_GT() (COND_GE() && COND_NE())
- #define COND_LE() (COND_LT() || COND_EQ())
- /* Reversed conditions */
- #define COND_NOT_CS() COND_CC()
- #define COND_NOT_CC() COND_CS()
- #define COND_NOT_VS() COND_VC()
- #define COND_NOT_VC() COND_VS()
- #define COND_NOT_NE() COND_EQ()
- #define COND_NOT_EQ() COND_NE()
- #define COND_NOT_MI() COND_PL()
- #define COND_NOT_PL() COND_MI()
- #define COND_NOT_LT() COND_GE()
- #define COND_NOT_GE() COND_LT()
- #define COND_NOT_HI() COND_LS()
- #define COND_NOT_LS() COND_HI()
- #define COND_NOT_GT() COND_LE()
- #define COND_NOT_LE() COND_GT()
- /* Not real conditions, but here for convenience */
- #define COND_XS() (FLAG_X&0x100)
- #define COND_XC() (!COND_XS)
- /* Get the condition code register */
- #define m68ki_get_ccr() ((COND_XS() >> 4) | \
- (COND_MI() >> 4) | \
- (COND_EQ() << 2) | \
- (COND_VS() >> 6) | \
- (COND_CS() >> 8))
- /* Get the status register */
- #define m68ki_get_sr() ( FLAG_T1 | \
- FLAG_T0 | \
- (FLAG_S << 11) | \
- (FLAG_M << 11) | \
- FLAG_INT_MASK | \
- m68ki_get_ccr())
- /* ---------------------------- Cycle Counting ---------------------------- */
- #define ADD_CYCLES(A) m68ki_remaining_cycles += (A)
- #define USE_CYCLES(A) m68ki_remaining_cycles -= (A)
- #define SET_CYCLES(A) m68ki_remaining_cycles = A
- #define GET_CYCLES() m68ki_remaining_cycles
- #define USE_ALL_CYCLES() m68ki_remaining_cycles = 0
- /* ----------------------------- Read / Write ----------------------------- */
- /* Read from the current address space */
- #define m68ki_read_8(A) m68ki_read_8_fc (A, FLAG_S | m68ki_get_address_space())
- #define m68ki_read_16(A) m68ki_read_16_fc(A, FLAG_S | m68ki_get_address_space())
- #define m68ki_read_32(A) m68ki_read_32_fc(A, FLAG_S | m68ki_get_address_space())
- /* Write to the current data space */
- #define m68ki_write_8(A, V) m68ki_write_8_fc (A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
- #define m68ki_write_16(A, V) m68ki_write_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
- #define m68ki_write_32(A, V) m68ki_write_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
- #if M68K_SIMULATE_PD_WRITES
- #define m68ki_write_32_pd(A, V) m68ki_write_32_pd_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
- #else
- #define m68ki_write_32_pd(A, V) m68ki_write_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)
- #endif
- /* map read immediate 8 to read immediate 16 */
- #define m68ki_read_imm_8() MASK_OUT_ABOVE_8(m68ki_read_imm_16())
- /* Map PC-relative reads */
- #define m68ki_read_pcrel_8(A) m68k_read_pcrelative_8(A)
- #define m68ki_read_pcrel_16(A) m68k_read_pcrelative_16(A)
- #define m68ki_read_pcrel_32(A) m68k_read_pcrelative_32(A)
- /* Read from the program space */
- #define m68ki_read_program_8(A) m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)
- #define m68ki_read_program_16(A) m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)
- #define m68ki_read_program_32(A) m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)
- /* Read from the data space */
- #define m68ki_read_data_8(A) m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)
- #define m68ki_read_data_16(A) m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)
- #define m68ki_read_data_32(A) m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)
- /* ======================================================================== */
- /* =============================== PROTOTYPES ============================= */
- /* ======================================================================== */
- typedef union
- {
- UINT64 i;
- double f;
- } fp_reg;
- typedef struct
- {
- uint cpu_type; /* CPU Type: 68000, 68008, 68010, 68EC020, or 68020 */
- uint dar[16]; /* Data and Address Registers */
- uint ppc; /* Previous program counter */
- uint pc; /* Program Counter */
- uint sp[7]; /* User, Interrupt, and Master Stack Pointers */
- uint vbr; /* Vector Base Register (m68010+) */
- uint sfc; /* Source Function Code Register (m68010+) */
- uint dfc; /* Destination Function Code Register (m68010+) */
- uint cacr; /* Cache Control Register (m68020, unemulated) */
- uint caar; /* Cache Address Register (m68020, unemulated) */
- uint ir; /* Instruction Register */
- fp_reg fpr[8]; /* FPU Data Register (m68040) */
- uint fpiar; /* FPU Instruction Address Register (m68040) */
- uint fpsr; /* FPU Status Register (m68040) */
- uint fpcr; /* FPU Control Register (m68040) */
- uint t1_flag; /* Trace 1 */
- uint t0_flag; /* Trace 0 */
- uint s_flag; /* Supervisor */
- uint m_flag; /* Master/Interrupt state */
- uint x_flag; /* Extend */
- uint n_flag; /* Negative */
- uint not_z_flag; /* Zero, inverted for speedups */
- uint v_flag; /* Overflow */
- uint c_flag; /* Carry */
- uint int_mask; /* I0-I2 */
- uint int_level; /* State of interrupt pins IPL0-IPL2 -- ASG: changed from ints_pending */
- uint int_cycles; /* ASG: extra cycles from generated interrupts */
- uint stopped; /* Stopped state */
- uint pref_addr; /* Last prefetch address */
- uint pref_data; /* Data in the prefetch queue */
- uint address_mask; /* Available address pins */
- uint sr_mask; /* Implemented status register bits */
- uint instr_mode; /* Stores whether we are in instruction mode or group 0/1 exception mode */
- uint run_mode; /* Stores whether we are processing a reset, bus error, address error, or something else */
- /* Clocks required for instructions / exceptions */
- uint cyc_bcc_notake_b;
- uint cyc_bcc_notake_w;
- uint cyc_dbcc_f_noexp;
- uint cyc_dbcc_f_exp;
- uint cyc_scc_r_true;
- uint cyc_movem_w;
- uint cyc_movem_l;
- uint cyc_shift;
- uint cyc_reset;
- uint8* cyc_instruction;
- uint8* cyc_exception;
- /* Callbacks to host */
- int (*int_ack_callback)(int int_line); /* Interrupt Acknowledge */
- void (*bkpt_ack_callback)(unsigned int data); /* Breakpoint Acknowledge */
- void (*reset_instr_callback)(void); /* Called when a RESET instruction is encountered */
- void (*cmpild_instr_callback)(unsigned int, int); /* Called when a CMPI.L #v, Dn instruction is encountered */
- void (*rte_instr_callback)(void); /* Called when a RTE instruction is encountered */
- int (*tas_instr_callback)(void); /* Called when a TAS instruction is encountered, allows / disallows writeback */
- void (*pc_changed_callback)(unsigned int new_pc); /* Called when the PC changes by a large amount */
- void (*set_fc_callback)(unsigned int new_fc); /* Called when the CPU function code changes */
- void (*instr_hook_callback)(void); /* Called every instruction cycle prior to execution */
- // notaz
- sint cyc_initial_cycles;
- sint cyc_remaining_cycles;
- sint not_polling;
- } m68ki_cpu_core;
- // notaz
- extern m68ki_cpu_core *m68ki_cpu_p;
- #define m68ki_cpu (*m68ki_cpu_p)
- #define m68ki_initial_cycles m68ki_cpu_p->cyc_initial_cycles
- #define m68ki_remaining_cycles m68ki_cpu_p->cyc_remaining_cycles
- //extern m68ki_cpu_core m68ki_cpu;
- //extern sint m68ki_remaining_cycles;
- extern uint m68ki_tracing;
- extern uint8 m68ki_shift_8_table[];
- extern uint16 m68ki_shift_16_table[];
- extern uint m68ki_shift_32_table[];
- extern uint8 m68ki_exception_cycle_table[][256];
- extern uint m68ki_address_space;
- extern uint8 m68ki_ea_idx_cycle_table[];
- extern uint m68ki_aerr_address;
- extern uint m68ki_aerr_write_mode;
- extern uint m68ki_aerr_fc;
- /* Read data immediately after the program counter */
- INLINE uint m68ki_read_imm_16(void);
- INLINE uint m68ki_read_imm_32(void);
- /* Read data with specific function code */
- INLINE uint m68ki_read_8_fc (uint address, uint fc);
- INLINE uint m68ki_read_16_fc (uint address, uint fc);
- INLINE uint m68ki_read_32_fc (uint address, uint fc);
- /* Write data with specific function code */
- INLINE void m68ki_write_8_fc (uint address, uint fc, uint value);
- INLINE void m68ki_write_16_fc(uint address, uint fc, uint value);
- INLINE void m68ki_write_32_fc(uint address, uint fc, uint value);
- #if M68K_SIMULATE_PD_WRITES
- INLINE void m68ki_write_32_pd_fc(uint address, uint fc, uint value);
- #endif /* M68K_SIMULATE_PD_WRITES */
- /* Indexed and PC-relative ea fetching */
- INLINE uint m68ki_get_ea_pcdi(void);
- INLINE uint m68ki_get_ea_pcix(void);
- INLINE uint m68ki_get_ea_ix(uint An);
- /* Operand fetching */
- INLINE uint OPER_AY_AI_8(void);
- INLINE uint OPER_AY_AI_16(void);
- INLINE uint OPER_AY_AI_32(void);
- INLINE uint OPER_AY_PI_8(void);
- INLINE uint OPER_AY_PI_16(void);
- INLINE uint OPER_AY_PI_32(void);
- INLINE uint OPER_AY_PD_8(void);
- INLINE uint OPER_AY_PD_16(void);
- INLINE uint OPER_AY_PD_32(void);
- INLINE uint OPER_AY_DI_8(void);
- INLINE uint OPER_AY_DI_16(void);
- INLINE uint OPER_AY_DI_32(void);
- INLINE uint OPER_AY_IX_8(void);
- INLINE uint OPER_AY_IX_16(void);
- INLINE uint OPER_AY_IX_32(void);
- INLINE uint OPER_AX_AI_8(void);
- INLINE uint OPER_AX_AI_16(void);
- INLINE uint OPER_AX_AI_32(void);
- INLINE uint OPER_AX_PI_8(void);
- INLINE uint OPER_AX_PI_16(void);
- INLINE uint OPER_AX_PI_32(void);
- INLINE uint OPER_AX_PD_8(void);
- INLINE uint OPER_AX_PD_16(void);
- INLINE uint OPER_AX_PD_32(void);
- INLINE uint OPER_AX_DI_8(void);
- INLINE uint OPER_AX_DI_16(void);
- INLINE uint OPER_AX_DI_32(void);
- INLINE uint OPER_AX_IX_8(void);
- INLINE uint OPER_AX_IX_16(void);
- INLINE uint OPER_AX_IX_32(void);
- INLINE uint OPER_A7_PI_8(void);
- INLINE uint OPER_A7_PD_8(void);
- INLINE uint OPER_AW_8(void);
- INLINE uint OPER_AW_16(void);
- INLINE uint OPER_AW_32(void);
- INLINE uint OPER_AL_8(void);
- INLINE uint OPER_AL_16(void);
- INLINE uint OPER_AL_32(void);
- INLINE uint OPER_PCDI_8(void);
- INLINE uint OPER_PCDI_16(void);
- INLINE uint OPER_PCDI_32(void);
- INLINE uint OPER_PCIX_8(void);
- INLINE uint OPER_PCIX_16(void);
- INLINE uint OPER_PCIX_32(void);
- /* Stack operations */
- INLINE void m68ki_push_16(uint value);
- INLINE void m68ki_push_32(uint value);
- INLINE uint m68ki_pull_16(void);
- INLINE uint m68ki_pull_32(void);
- /* Program flow operations */
- INLINE void m68ki_jump(uint new_pc);
- INLINE void m68ki_jump_vector(uint vector);
- INLINE void m68ki_branch_8(uint offset);
- INLINE void m68ki_branch_16(uint offset);
- INLINE void m68ki_branch_32(uint offset);
- /* Status register operations. */
- INLINE void m68ki_set_s_flag(uint value); /* Only bit 2 of value should be set (i.e. 4 or 0) */
- INLINE void m68ki_set_sm_flag(uint value); /* only bits 1 and 2 of value should be set */
- INLINE void m68ki_set_ccr(uint value); /* set the condition code register */
- INLINE void m68ki_set_sr(uint value); /* set the status register */
- INLINE void m68ki_set_sr_noint(uint value); /* set the status register */
- /* Exception processing */
- INLINE uint m68ki_init_exception(void); /* Initial exception processing */
- INLINE void m68ki_stack_frame_3word(uint pc, uint sr); /* Stack various frame types */
- INLINE void m68ki_stack_frame_buserr(uint sr);
- INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector);
- INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector);
- INLINE void m68ki_stack_frame_0010(uint sr, uint vector);
- INLINE void m68ki_stack_frame_1000(uint pc, uint sr, uint vector);
- INLINE void m68ki_stack_frame_1010(uint sr, uint vector, uint pc);
- INLINE void m68ki_stack_frame_1011(uint sr, uint vector, uint pc);
- INLINE void m68ki_exception_trap(uint vector);
- INLINE void m68ki_exception_trapN(uint vector);
- INLINE void m68ki_exception_trace(void);
- INLINE void m68ki_exception_privilege_violation(void);
- INLINE void m68ki_exception_1010(void);
- INLINE void m68ki_exception_1111(void);
- INLINE void m68ki_exception_illegal(void);
- INLINE void m68ki_exception_format_error(void);
- INLINE void m68ki_exception_address_error(void);
- INLINE void m68ki_exception_interrupt(uint int_level);
- INLINE void m68ki_check_interrupts(void); /* ASG: check for interrupts */
- /* quick disassembly (used for logging) */
- char* m68ki_disassemble_quick(unsigned int pc, unsigned int cpu_type);
- /* ======================================================================== */
- /* =========================== UTILITY FUNCTIONS ========================== */
- /* ======================================================================== */
- /* ---------------------------- Read Immediate ---------------------------- */
- /* Handles all immediate reads, does address error check, function code setting,
- * and prefetching if they are enabled in m68kconf.h
- */
- INLINE uint m68ki_read_imm_16(void)
- {
- m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
- #if M68K_EMULATE_PREFETCH
- if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)
- {
- CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);
- CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));
- }
- REG_PC += 2;
- return MASK_OUT_ABOVE_16(CPU_PREF_DATA >> ((2-((REG_PC-2)&2))<<3));
- #else
- REG_PC += 2;
- return m68k_read_immediate_16(ADDRESS_68K(REG_PC-2));
- #endif /* M68K_EMULATE_PREFETCH */
- }
- INLINE uint m68ki_read_imm_32(void)
- {
- #if M68K_EMULATE_PREFETCH
- uint temp_val;
- m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
- if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)
- {
- CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);
- CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));
- }
- temp_val = CPU_PREF_DATA;
- REG_PC += 2;
- if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)
- {
- CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);
- CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));
- temp_val = MASK_OUT_ABOVE_32((temp_val << 16) | (CPU_PREF_DATA >> 16));
- }
- REG_PC += 2;
- return temp_val;
- #else
- m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
- REG_PC += 4;
- return m68k_read_immediate_32(ADDRESS_68K(REG_PC-4));
- #endif /* M68K_EMULATE_PREFETCH */
- }
- /* ------------------------- Top level read/write ------------------------- */
- /* Handles all memory accesses (except for immediate reads if they are
- * configured to use separate functions in m68kconf.h).
- * All memory accesses must go through these top level functions.
- * These functions will also check for address error and set the function
- * code if they are enabled in m68kconf.h.
- */
- INLINE uint m68ki_read_8_fc(uint address, uint fc)
- {
- m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
- return m68k_read_memory_8(ADDRESS_68K(address));
- }
- INLINE uint m68ki_read_16_fc(uint address, uint fc)
- {
- m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error_010_less(address, MODE_READ, fc); /* auto-disable (see m68kcpu.h) */
- return m68k_read_memory_16(ADDRESS_68K(address));
- }
- INLINE uint m68ki_read_32_fc(uint address, uint fc)
- {
- m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error_010_less(address, MODE_READ, fc); /* auto-disable (see m68kcpu.h) */
- return m68k_read_memory_32(ADDRESS_68K(address));
- }
- INLINE void m68ki_write_8_fc(uint address, uint fc, uint value)
- {
- m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
- m68k_write_memory_8(ADDRESS_68K(address), value);
- }
- INLINE void m68ki_write_16_fc(uint address, uint fc, uint value)
- {
- m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */
- m68k_write_memory_16(ADDRESS_68K(address), value);
- }
- INLINE void m68ki_write_32_fc(uint address, uint fc, uint value)
- {
- m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */
- m68k_write_memory_32(ADDRESS_68K(address), value);
- }
- #if M68K_SIMULATE_PD_WRITES
- INLINE void m68ki_write_32_pd_fc(uint address, uint fc, uint value)
- {
- m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */
- m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */
- m68k_write_memory_32_pd(ADDRESS_68K(address), value);
- }
- #endif
- /* --------------------- Effective Address Calculation -------------------- */
- /* The program counter relative addressing modes cause operands to be
- * retrieved from program space, not data space.
- */
- INLINE uint m68ki_get_ea_pcdi(void)
- {
- uint old_pc = REG_PC;
- m68ki_use_program_space(); /* auto-disable */
- return old_pc + MAKE_INT_16(m68ki_read_imm_16());
- }
- INLINE uint m68ki_get_ea_pcix(void)
- {
- m68ki_use_program_space(); /* auto-disable */
- return m68ki_get_ea_ix(REG_PC);
- }
- /* Indexed addressing modes are encoded as follows:
- *
- * Base instruction format:
- * F E D C B A 9 8 7 6 | 5 4 3 | 2 1 0
- * x x x x x x x x x x | 1 1 0 | BASE REGISTER (An)
- *
- * Base instruction format for destination EA in move instructions:
- * F E D C | B A 9 | 8 7 6 | 5 4 3 2 1 0
- * x x x x | BASE REG | 1 1 0 | X X X X X X (An)
- *
- * Brief extension format:
- * F | E D C | B | A 9 | 8 | 7 6 5 4 3 2 1 0
- * D/A | REGISTER | W/L | SCALE | 0 | DISPLACEMENT
- *
- * Full extension format:
- * F E D C B A 9 8 7 6 5 4 3 2 1 0
- * D/A | REGISTER | W/L | SCALE | 1 | BS | IS | BD SIZE | 0 | I/IS
- * BASE DISPLACEMENT (0, 16, 32 bit) (bd)
- * OUTER DISPLACEMENT (0, 16, 32 bit) (od)
- *
- * D/A: 0 = Dn, 1 = An (Xn)
- * W/L: 0 = W (sign extend), 1 = L (.SIZE)
- * SCALE: 00=1, 01=2, 10=4, 11=8 (*SCALE)
- * BS: 0=add base reg, 1=suppress base reg (An suppressed)
- * IS: 0=add index, 1=suppress index (Xn suppressed)
- * BD SIZE: 00=reserved, 01=NULL, 10=Word, 11=Long (size of bd)
- *
- * IS I/IS Operation
- * 0 000 No Memory Indirect
- * 0 001 indir prex with null outer
- * 0 010 indir prex with word outer
- * 0 011 indir prex with long outer
- * 0 100 reserved
- * 0 101 indir postx with null outer
- * 0 110 indir postx with word outer
- * 0 111 indir postx with long outer
- * 1 000 no memory indirect
- * 1 001 mem indir with null outer
- * 1 010 mem indir with word outer
- * 1 011 mem indir with long outer
- * 1 100-111 reserved
- */
- INLINE uint m68ki_get_ea_ix(uint An)
- {
- /* An = base register */
- uint extension = m68ki_read_imm_16();
- uint Xn = 0; /* Index register */
- uint bd = 0; /* Base Displacement */
- uint od = 0; /* Outer Displacement */
- if(CPU_TYPE_IS_010_LESS(CPU_TYPE))
- {
- /* Calculate index */
- Xn = REG_DA[extension>>12]; /* Xn */
- if(!BIT_B(extension)) /* W/L */
- Xn = MAKE_INT_16(Xn);
- /* Add base register and displacement and return */
- return An + Xn + MAKE_INT_8(extension);
- }
- /* Brief extension format */
- if(!BIT_8(extension))
- {
- /* Calculate index */
- Xn = REG_DA[extension>>12]; /* Xn */
- if(!BIT_B(extension)) /* W/L */
- Xn = MAKE_INT_16(Xn);
- /* Add scale if proper CPU type */
- if(CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))
- Xn <<= (extension>>9) & 3; /* SCALE */
- /* Add base register and displacement and return */
- return An + Xn + MAKE_INT_8(extension);
- }
- /* Full extension format */
- USE_CYCLES(m68ki_ea_idx_cycle_table[extension&0x3f]);
- /* Check if base register is present */
- if(BIT_7(extension)) /* BS */
- An = 0; /* An */
- /* Check if index is present */
- if(!BIT_6(extension)) /* IS */
- {
- Xn = REG_DA[extension>>12]; /* Xn */
- if(!BIT_B(extension)) /* W/L */
- Xn = MAKE_INT_16(Xn);
- Xn <<= (extension>>9) & 3; /* SCALE */
- }
- /* Check if base displacement is present */
- if(BIT_5(extension)) /* BD SIZE */
- bd = BIT_4(extension) ? m68ki_read_imm_32() : MAKE_INT_16(m68ki_read_imm_16());
- /* If no indirect action, we are done */
- if(!(extension&7)) /* No Memory Indirect */
- return An + bd + Xn;
- /* Check if outer displacement is present */
- if(BIT_1(extension)) /* I/IS: od */
- od = BIT_0(extension) ? m68ki_read_imm_32() : MAKE_INT_16(m68ki_read_imm_16());
- /* Postindex */
- if(BIT_2(extension)) /* I/IS: 0 = preindex, 1 = postindex */
- return m68ki_read_32(An + bd) + Xn + od;
- /* Preindex */
- return m68ki_read_32(An + bd + Xn) + od;
- }
- /* Fetch operands */
- INLINE uint OPER_AY_AI_8(void) {uint ea = EA_AY_AI_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AY_AI_16(void) {uint ea = EA_AY_AI_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AY_AI_32(void) {uint ea = EA_AY_AI_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AY_PI_8(void) {uint ea = EA_AY_PI_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AY_PI_16(void) {uint ea = EA_AY_PI_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AY_PI_32(void) {uint ea = EA_AY_PI_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AY_PD_8(void) {uint ea = EA_AY_PD_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AY_PD_16(void) {uint ea = EA_AY_PD_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AY_PD_32(void) {uint ea = EA_AY_PD_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AY_DI_8(void) {uint ea = EA_AY_DI_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AY_DI_16(void) {uint ea = EA_AY_DI_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AY_DI_32(void) {uint ea = EA_AY_DI_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AY_IX_8(void) {uint ea = EA_AY_IX_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AY_IX_16(void) {uint ea = EA_AY_IX_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AY_IX_32(void) {uint ea = EA_AY_IX_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AX_AI_8(void) {uint ea = EA_AX_AI_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AX_AI_16(void) {uint ea = EA_AX_AI_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AX_AI_32(void) {uint ea = EA_AX_AI_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AX_PI_8(void) {uint ea = EA_AX_PI_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AX_PI_16(void) {uint ea = EA_AX_PI_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AX_PI_32(void) {uint ea = EA_AX_PI_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AX_PD_8(void) {uint ea = EA_AX_PD_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AX_PD_16(void) {uint ea = EA_AX_PD_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AX_PD_32(void) {uint ea = EA_AX_PD_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AX_DI_8(void) {uint ea = EA_AX_DI_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AX_DI_16(void) {uint ea = EA_AX_DI_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AX_DI_32(void) {uint ea = EA_AX_DI_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AX_IX_8(void) {uint ea = EA_AX_IX_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AX_IX_16(void) {uint ea = EA_AX_IX_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AX_IX_32(void) {uint ea = EA_AX_IX_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_A7_PI_8(void) {uint ea = EA_A7_PI_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_A7_PD_8(void) {uint ea = EA_A7_PD_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AW_8(void) {uint ea = EA_AW_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AW_16(void) {uint ea = EA_AW_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AW_32(void) {uint ea = EA_AW_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_AL_8(void) {uint ea = EA_AL_8(); return m68ki_read_8(ea); }
- INLINE uint OPER_AL_16(void) {uint ea = EA_AL_16(); return m68ki_read_16(ea);}
- INLINE uint OPER_AL_32(void) {uint ea = EA_AL_32(); return m68ki_read_32(ea);}
- INLINE uint OPER_PCDI_8(void) {uint ea = EA_PCDI_8(); return m68ki_read_pcrel_8(ea); }
- INLINE uint OPER_PCDI_16(void) {uint ea = EA_PCDI_16(); return m68ki_read_pcrel_16(ea);}
- INLINE uint OPER_PCDI_32(void) {uint ea = EA_PCDI_32(); return m68ki_read_pcrel_32(ea);}
- INLINE uint OPER_PCIX_8(void) {uint ea = EA_PCIX_8(); return m68ki_read_pcrel_8(ea); }
- INLINE uint OPER_PCIX_16(void) {uint ea = EA_PCIX_16(); return m68ki_read_pcrel_16(ea);}
- INLINE uint OPER_PCIX_32(void) {uint ea = EA_PCIX_32(); return m68ki_read_pcrel_32(ea);}
- /* ---------------------------- Stack Functions --------------------------- */
- /* Push/pull data from the stack */
- INLINE void m68ki_push_16(uint value)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);
- m68ki_write_16(REG_SP, value);
- }
- INLINE void m68ki_push_32(uint value)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);
- m68ki_write_32(REG_SP, value);
- }
- INLINE uint m68ki_pull_16(void)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);
- return m68ki_read_16(REG_SP-2);
- }
- INLINE uint m68ki_pull_32(void)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);
- return m68ki_read_32(REG_SP-4);
- }
- /* Increment/decrement the stack as if doing a push/pull but
- * don't do any memory access.
- */
- INLINE void m68ki_fake_push_16(void)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);
- }
- INLINE void m68ki_fake_push_32(void)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);
- }
- INLINE void m68ki_fake_pull_16(void)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);
- }
- INLINE void m68ki_fake_pull_32(void)
- {
- REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);
- }
- /* ----------------------------- Program Flow ----------------------------- */
- /* Jump to a new program location or vector.
- * These functions will also call the pc_changed callback if it was enabled
- * in m68kconf.h.
- */
- INLINE void m68ki_jump(uint new_pc)
- {
- REG_PC = new_pc;
- m68ki_pc_changed(REG_PC);
- }
- INLINE void m68ki_jump_vector(uint vector)
- {
- REG_PC = (vector<<2) + REG_VBR;
- REG_PC = m68ki_read_data_32(REG_PC);
- m68ki_pc_changed(REG_PC);
- }
- /* Branch to a new memory location.
- * The 32-bit branch will call pc_changed if it was enabled in m68kconf.h.
- * So far I've found no problems with not calling pc_changed for 8 or 16
- * bit branches.
- */
- INLINE void m68ki_branch_8(uint offset)
- {
- REG_PC += MAKE_INT_8(offset);
- }
- INLINE void m68ki_branch_16(uint offset)
- {
- REG_PC += MAKE_INT_16(offset);
- }
- INLINE void m68ki_branch_32(uint offset)
- {
- REG_PC += offset;
- m68ki_pc_changed(REG_PC);
- }
- /* ---------------------------- Status Register --------------------------- */
- /* Set the S flag and change the active stack pointer.
- * Note that value MUST be 4 or 0.
- */
- INLINE void m68ki_set_s_flag(uint value)
- {
- /* Backup the old stack pointer */
- REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;
- /* Set the S flag */
- FLAG_S = value;
- /* Set the new stack pointer */
- REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];
- }
- /* Set the S and M flags and change the active stack pointer.
- * Note that value MUST be 0, 2, 4, or 6 (bit2 = S, bit1 = M).
- */
- INLINE void m68ki_set_sm_flag(uint value)
- {
- /* Backup the old stack pointer */
- REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;
- /* Set the S and M flags */
- FLAG_S = value & SFLAG_SET;
- FLAG_M = value & MFLAG_SET;
- /* Set the new stack pointer */
- REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];
- }
- /* Set the S and M flags. Don't touch the stack pointer. */
- INLINE void m68ki_set_sm_flag_nosp(uint value)
- {
- /* Set the S and M flags */
- FLAG_S = value & SFLAG_SET;
- FLAG_M = value & MFLAG_SET;
- }
- /* Set the condition code register */
- INLINE void m68ki_set_ccr(uint value)
- {
- FLAG_X = BIT_4(value) << 4;
- FLAG_N = BIT_3(value) << 4;
- FLAG_Z = !BIT_2(value);
- FLAG_V = BIT_1(value) << 6;
- FLAG_C = BIT_0(value) << 8;
- }
- /* Set the status register but don't check for interrupts */
- INLINE void m68ki_set_sr_noint(uint value)
- {
- /* Mask out the "unimplemented" bits */
- value &= CPU_SR_MASK;
- /* Now set the status register */
- FLAG_T1 = BIT_F(value);
- FLAG_T0 = BIT_E(value);
- FLAG_INT_MASK = value & 0x0700;
- m68ki_set_ccr(value);
- m68ki_set_sm_flag((value >> 11) & 6);
- }
- /* Set the status register but don't check for interrupts nor
- * change the stack pointer
- */
- INLINE void m68ki_set_sr_noint_nosp(uint value)
- {
- /* Mask out the "unimplemented" bits */
- value &= CPU_SR_MASK;
- /* Now set the status register */
- FLAG_T1 = BIT_F(value);
- FLAG_T0 = BIT_E(value);
- FLAG_INT_MASK = value & 0x0700;
- m68ki_set_ccr(value);
- m68ki_set_sm_flag_nosp((value >> 11) & 6);
- }
- /* Set the status register and check for interrupts */
- INLINE void m68ki_set_sr(uint value)
- {
- m68ki_set_sr_noint(value);
- if (GET_CYCLES() >= 0) // notaz
- m68ki_check_interrupts();
- }
- /* ------------------------- Exception Processing ------------------------- */
- /* Initiate exception processing */
- INLINE uint m68ki_init_exception(void)
- {
- /* Save the old status register */
- uint sr = m68ki_get_sr();
- /* Turn off trace flag, clear pending traces */
- FLAG_T1 = FLAG_T0 = 0;
- m68ki_clear_trace();
- /* Enter supervisor mode */
- m68ki_set_s_flag(SFLAG_SET);
- return sr;
- }
- /* 3 word stack frame (68000 only) */
- INLINE void m68ki_stack_frame_3word(uint pc, uint sr)
- {
- m68ki_push_32(pc);
- m68ki_push_16(sr);
- }
- /* Format 0 stack frame.
- * This is the standard stack frame for 68010+.
- */
- INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector)
- {
- /* Stack a 3-word frame if we are 68000 */
- if(CPU_TYPE == CPU_TYPE_000 || CPU_TYPE == CPU_TYPE_008)
- {
- m68ki_stack_frame_3word(pc, sr);
- return;
- }
- m68ki_push_16(vector<<2);
- m68ki_push_32(pc);
- m68ki_push_16(sr);
- }
- /* Format 1 stack frame (68020).
- * For 68020, this is the 4 word throwaway frame.
- */
- INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector)
- {
- m68ki_push_16(0x1000 | (vector<<2));
- m68ki_push_32(pc);
- m68ki_push_16(sr);
- }
- /* Format 2 stack frame.
- * This is used only by 68020 for trap exceptions.
- */
- INLINE void m68ki_stack_frame_0010(uint sr, uint vector)
- {
- m68ki_push_32(REG_PPC);
- m68ki_push_16(0x2000 | (vector<<2));
- m68ki_push_32(REG_PC);
- m68ki_push_16(sr);
- }
- /* Bus error stack frame (68000 only).
- */
- INLINE void m68ki_stack_frame_buserr(uint sr)
- {
- m68ki_push_32(REG_PC);
- m68ki_push_16(sr);
- m68ki_push_16(REG_IR);
- m68ki_push_32(m68ki_aerr_address); /* access address */
- /* 0 0 0 0 0 0 0 0 0 0 0 R/W I/N FC
- * R/W 0 = write, 1 = read
- * I/N 0 = instruction, 1 = not
- * FC 3-bit function code
- */
- m68ki_push_16(m68ki_aerr_write_mode | CPU_INSTR_MODE | m68ki_aerr_fc);
- }
- /* Format 8 stack frame (68010).
- * 68010 only. This is the 29 word bus/address error frame.
- */
- INLINE void m68ki_stack_frame_1000(uint pc, uint sr, uint vector)
- {
- /* VERSION
- * NUMBER
- * INTERNAL INFORMATION, 16 WORDS
- */
- m68ki_fake_push_32();
- m68ki_fake_push_32();
- m68ki_fake_push_32();
- m68ki_fake_push_32();
- m68ki_fake_push_32();
- m68ki_fake_push_32();
- m68ki_fake_push_32();
- m68ki_fake_push_32();
- /* INSTRUCTION INPUT BUFFER */
- m68ki_push_16(0);
- /* UNUSED, RESERVED (not written) */
- m68ki_fake_push_16();
- /* DATA INPUT BUFFER */
- m68ki_push_16(0);
- /* UNUSED, RESERVED (not written) */
- m68ki_fake_push_16();
- /* DATA OUTPUT BUFFER */
- m68ki_push_16(0);
- /* UNUSED, RESERVED (not written) */
- m68ki_fake_push_16();
- /* FAULT ADDRESS */
- m68ki_push_32(0);
- /* SPECIAL STATUS WORD */
- m68ki_push_16(0);
- /* 1000, VECTOR OFFSET */
- m68ki_push_16(0x8000 | (vector<<2));
- /* PROGRAM COUNTER */
- m68ki_push_32(pc);
- /* STATUS REGISTER */
- m68ki_push_16(sr);
- }
- /* Format A stack frame (short bus fault).
- * This is used only by 68020 for bus fault and address error
- * if the error happens at an instruction boundary.
- * PC stacked is address of next instruction.
- */
- INLINE void m68ki_stack_frame_1010(uint sr, uint vector, uint pc)
- {
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* DATA OUTPUT BUFFER (2 words) */
- m68ki_push_32(0);
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* DATA CYCLE FAULT ADDRESS (2 words) */
- m68ki_push_32(0);
- /* INSTRUCTION PIPE STAGE B */
- m68ki_push_16(0);
- /* INSTRUCTION PIPE STAGE C */
- m68ki_push_16(0);
- /* SPECIAL STATUS REGISTER */
- m68ki_push_16(0);
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* 1010, VECTOR OFFSET */
- m68ki_push_16(0xa000 | (vector<<2));
- /* PROGRAM COUNTER */
- m68ki_push_32(pc);
- /* STATUS REGISTER */
- m68ki_push_16(sr);
- }
- /* Format B stack frame (long bus fault).
- * This is used only by 68020 for bus fault and address error
- * if the error happens during instruction execution.
- * PC stacked is address of instruction in progress.
- */
- INLINE void m68ki_stack_frame_1011(uint sr, uint vector, uint pc)
- {
- /* INTERNAL REGISTERS (18 words) */
- m68ki_push_32(0);
- m68ki_push_32(0);
- m68ki_push_32(0);
- m68ki_push_32(0);
- m68ki_push_32(0);
- m68ki_push_32(0);
- m68ki_push_32(0);
- m68ki_push_32(0);
- m68ki_push_32(0);
- /* VERSION# (4 bits), INTERNAL INFORMATION */
- m68ki_push_16(0);
- /* INTERNAL REGISTERS (3 words) */
- m68ki_push_32(0);
- m68ki_push_16(0);
- /* DATA INTPUT BUFFER (2 words) */
- m68ki_push_32(0);
- /* INTERNAL REGISTERS (2 words) */
- m68ki_push_32(0);
- /* STAGE B ADDRESS (2 words) */
- m68ki_push_32(0);
- /* INTERNAL REGISTER (4 words) */
- m68ki_push_32(0);
- m68ki_push_32(0);
- /* DATA OUTPUT BUFFER (2 words) */
- m68ki_push_32(0);
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* DATA CYCLE FAULT ADDRESS (2 words) */
- m68ki_push_32(0);
- /* INSTRUCTION PIPE STAGE B */
- m68ki_push_16(0);
- /* INSTRUCTION PIPE STAGE C */
- m68ki_push_16(0);
- /* SPECIAL STATUS REGISTER */
- m68ki_push_16(0);
- /* INTERNAL REGISTER */
- m68ki_push_16(0);
- /* 1011, VECTOR OFFSET */
- m68ki_push_16(0xb000 | (vector<<2));
- /* PROGRAM COUNTER */
- m68ki_push_32(pc);
- /* STATUS REGISTER */
- m68ki_push_16(sr);
- }
- /* Used for Group 2 exceptions.
- * These stack a type 2 frame on the 020.
- */
- INLINE void m68ki_exception_trap(uint vector)
- {
- uint sr = m68ki_init_exception();
- if(CPU_TYPE_IS_010_LESS(CPU_TYPE))
- m68ki_stack_frame_0000(REG_PC, sr, vector);
- else
- m68ki_stack_frame_0010(sr, vector);
- m68ki_jump_vector(vector);
- /* Use up some clock cycles */
- USE_CYCLES(CYC_EXCEPTION[vector]);
- }
- /* Trap#n stacks a 0 frame but behaves like group2 otherwise */
- INLINE void m68ki_exception_trapN(uint vector)
- {
- uint sr = m68ki_init_exception();
- m68ki_stack_frame_0000(REG_PC, sr, vector);
- m68ki_jump_vector(vector);
- /* Use up some clock cycles */
- USE_CYCLES(CYC_EXCEPTION[vector]);
- }
- /* Exception for trace mode */
- INLINE void m68ki_exception_trace(void)
- {
- uint sr = m68ki_init_exception();
- if(CPU_TYPE_IS_010_LESS(CPU_TYPE))
- {
- #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
- if(CPU_TYPE_IS_000(CPU_TYPE))
- {
- CPU_INSTR_MODE = INSTRUCTION_NO;
- }
- #endif /* M68K_EMULATE_ADDRESS_ERROR */
- m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_TRACE);
- }
- else
- m68ki_stack_frame_0010(sr, EXCEPTION_TRACE);
- m68ki_jump_vector(EXCEPTION_TRACE);
- /* Trace nullifies a STOP instruction */
- CPU_STOPPED &= ~STOP_LEVEL_STOP;
- /* Use up some clock cycles */
- USE_CYCLES(CYC_EXCEPTION[EXCEPTION_TRACE]);
- }
- /* Exception for privilege violation */
- INLINE void m68ki_exception_privilege_violation(void)
- {
- uint sr = m68ki_init_exception();
- #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
- if(CPU_TYPE_IS_000(CPU_TYPE))
- {
- CPU_INSTR_MODE = INSTRUCTION_NO;
- }
- #endif /* M68K_EMULATE_ADDRESS_ERROR */
- m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_PRIVILEGE_VIOLATION);
- m68ki_jump_vector(EXCEPTION_PRIVILEGE_VIOLATION);
- /* Use up some clock cycles and undo the instruction's cycles */
- USE_CYCLES(CYC_EXCEPTION[EXCEPTION_PRIVILEGE_VIOLATION] - CYC_INSTRUCTION[REG_IR]);
- }
- /* Exception for A-Line instructions */
- INLINE void m68ki_exception_1010(void)
- {
- uint sr;
- #if M68K_LOG_1010_1111 == OPT_ON
- M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1010 instruction %04x (%s)\n",
- m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,
- m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));
- #endif
- sr = m68ki_init_exception();
- m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_1010);
- m68ki_jump_vector(EXCEPTION_1010);
- /* Use up some clock cycles and undo the instruction's cycles */
- USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1010] - CYC_INSTRUCTION[REG_IR]);
- }
- /* Exception for F-Line instructions */
- INLINE void m68ki_exception_1111(void)
- {
- uint sr;
- #if M68K_LOG_1010_1111 == OPT_ON
- M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1111 instruction %04x (%s)\n",
- m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,
- m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));
- #endif
- sr = m68ki_init_exception();
- m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_1111);
- m68ki_jump_vector(EXCEPTION_1111);
- /* Use up some clock cycles and undo the instruction's cycles */
- USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1111] - CYC_INSTRUCTION[REG_IR]);
- }
- /* Exception for illegal instructions */
- INLINE void m68ki_exception_illegal(void)
- {
- uint sr;
- M68K_DO_LOG((M68K_LOG_FILEHANDLE "%s at %08x: illegal instruction %04x (%s)\n",
- m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,
- m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));
- sr = m68ki_init_exception();
- #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
- if(CPU_TYPE_IS_000(CPU_TYPE))
- {
- CPU_INSTR_MODE = INSTRUCTION_NO;
- }
- #endif /* M68K_EMULATE_ADDRESS_ERROR */
- m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_ILLEGAL_INSTRUCTION);
- m68ki_jump_vector(EXCEPTION_ILLEGAL_INSTRUCTION);
- /* Use up some clock cycles and undo the instruction's cycles */
- USE_CYCLES(CYC_EXCEPTION[EXCEPTION_ILLEGAL_INSTRUCTION] - CYC_INSTRUCTION[REG_IR]);
- }
- /* Exception for format errror in RTE */
- INLINE void m68ki_exception_format_error(void)
- {
- uint sr = m68ki_init_exception();
- m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_FORMAT_ERROR);
- m68ki_jump_vector(EXCEPTION_FORMAT_ERROR);
- /* Use up some clock cycles and undo the instruction's cycles */
- USE_CYCLES(CYC_EXCEPTION[EXCEPTION_FORMAT_ERROR] - CYC_INSTRUCTION[REG_IR]);
- }
- /* Exception for address error */
- INLINE void m68ki_exception_address_error(void)
- {
- uint sr = m68ki_init_exception();
- /* If we were processing a bus error, address error, or reset,
- * this is a catastrophic failure.
- * Halt the CPU
- */
- if(CPU_RUN_MODE == RUN_MODE_BERR_AERR_RESET)
- {
- m68k_read_memory_8(0x00ffff01);
- CPU_STOPPED = STOP_LEVEL_HALT;
- return;
- }
- CPU_RUN_MODE = RUN_MODE_BERR_AERR_RESET;
- /* Note: This is implemented for 68000 only! */
- m68ki_stack_frame_buserr(sr);
- m68ki_jump_vector(EXCEPTION_ADDRESS_ERROR);
- /* Use up some clock cycles and undo the instruction's cycles */
- USE_CYCLES(CYC_EXCEPTION[EXCEPTION_ADDRESS_ERROR] - CYC_INSTRUCTION[REG_IR]);
- }
- /* Service an interrupt request and start exception processing */
- INLINE void m68ki_exception_interrupt(uint int_level)
- {
- uint vector;
- uint sr;
- uint new_pc;
- #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON
- if(CPU_TYPE_IS_000(CPU_TYPE))
- {
- CPU_INSTR_MODE = INSTRUCTION_NO;
- }
- #endif /* M68K_EMULATE_ADDRESS_ERROR */
- /* Turn off the stopped state */
- CPU_STOPPED &= ~STOP_LEVEL_STOP;
- /* If we are halted, don't do anything */
- if(CPU_STOPPED)
- return;
- /* Acknowledge the interrupt */
- vector = m68ki_int_ack(int_level);
- /* Get the interrupt vector */
- if(vector == M68K_INT_ACK_AUTOVECTOR)
- /* Use the autovectors. This is the most commonly used implementation */
- vector = EXCEPTION_INTERRUPT_AUTOVECTOR+int_level;
- else if(vector == M68K_INT_ACK_SPURIOUS)
- /* Called if no devices respond to the interrupt acknowledge */
- vector = EXCEPTION_SPURIOUS_INTERRUPT;
- else if(vector > 255)
- {
- M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: Interrupt acknowledge returned invalid vector $%x\n",
- m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PC), vector));
- return;
- }
- /* Start exception processing */
- sr = m68ki_init_exception();
- /* Set the interrupt mask to the level of the one being serviced */
- FLAG_INT_MASK = int_level<<8;
- /* Get the new PC */
- new_pc = m68ki_read_data_32((vector<<2) + REG_VBR);
- //new_pc = m68k_read_immediate_32((vector<<2) + REG_VBR); // notaz hack
- /* If vector is uninitialized, call the uninitialized interrupt vector */
- if(new_pc == 0)
- new_pc = m68ki_read_data_32((EXCEPTION_UNINITIALIZED_INTERRUPT<<2) + REG_VBR);
- /* Generate a stack frame */
- m68ki_stack_frame_0000(REG_PC, sr, vector);
- if(FLAG_M && CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))
- {
- /* Create throwaway frame */
- m68ki_set_sm_flag(FLAG_S); /* clear M */
- sr |= 0x2000; /* Same as SR in master stack frame except S is forced high */
- m68ki_stack_frame_0001(REG_PC, sr, vector);
- }
- m68ki_jump(new_pc);
- /* Defer cycle counting until later */
- CPU_INT_CYCLES += CYC_EXCEPTION[vector];
- #if !M68K_EMULATE_INT_ACK
- /* Automatically clear IRQ if we are not using an acknowledge scheme */
- CPU_INT_LEVEL = 0;
- #endif /* M68K_EMULATE_INT_ACK */
- }
- /* ASG: Check for interrupts */
- INLINE void m68ki_check_interrupts(void)
- {
- if(CPU_INT_LEVEL > FLAG_INT_MASK)
- m68ki_exception_interrupt(CPU_INT_LEVEL>>8);
- }
- /* ======================================================================== */
- /* ============================== END OF FILE ============================= */
- /* ======================================================================== */
- #endif /* M68KCPU__HEADER */
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