298 lines
5.2 KiB
C
298 lines
5.2 KiB
C
#include <stdio.h>
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#include <ctype.h>
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#include "ansidecl.h"
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#include "callback.h"
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#include "opcode/mn10200.h"
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#include <limits.h>
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#include "remote-sim.h"
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#ifndef INLINE
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#ifdef __GNUC__
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#define INLINE inline
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#else
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#define INLINE
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#endif
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#endif
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extern host_callback *mn10200_callback;
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#define DEBUG_TRACE 0x00000001
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#define DEBUG_VALUES 0x00000002
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extern int mn10200_debug;
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#ifdef __STDC__
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#define SIGNED signed
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#else
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#define SIGNED
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#endif
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#if UCHAR_MAX == 255
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typedef unsigned char uint8;
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typedef SIGNED char int8;
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#else
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error "Char is not an 8-bit type"
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#endif
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#if SHRT_MAX == 32767
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typedef unsigned short uint16;
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typedef SIGNED short int16;
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#else
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error "Short is not a 16-bit type"
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#endif
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#if INT_MAX == 2147483647
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typedef unsigned int uint32;
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typedef SIGNED int int32;
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#else
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# if LONG_MAX == 2147483647
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typedef unsigned long uint32;
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typedef SIGNED long int32;
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# else
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error "Neither int nor long is a 32-bit type"
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# endif
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#endif
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typedef uint32 reg_t;
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struct simops
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{
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long opcode;
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long mask;
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void (*func)();
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int length;
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int format;
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int numops;
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int operands[16];
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};
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/* The current state of the processor; registers, memory, etc. */
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struct _state
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{
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reg_t regs[11]; /* registers, d0-d3, a0-a3, pc, mdr, psw */
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uint8 *mem; /* main memory */
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int exception; /* Actually a signal number. */
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int exited; /* Did the program exit? */
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} State;
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extern uint32 OP[4];
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extern struct simops Simops[];
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#define PC (State.regs[8])
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#define PSW (State.regs[10])
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#define PSW_ZF 0x1
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#define PSW_NF 0x2
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#define PSW_CF 0x4
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#define PSW_VF 0x8
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#define PSW_ZX 0x10
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#define PSW_NX 0x20
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#define PSW_CX 0x40
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#define PSW_VX 0x80
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#define REG_D0 0
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#define REG_A0 4
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#define REG_SP 7
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#define REG_PC 8
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#define REG_MDR 9
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#define REG_PSW 10
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#define SEXT3(x) ((((x)&0x7)^(~0x3))+0x4)
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/* sign-extend a 4-bit number */
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#define SEXT4(x) ((((x)&0xf)^(~0x7))+0x8)
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/* sign-extend a 5-bit number */
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#define SEXT5(x) ((((x)&0x1f)^(~0xf))+0x10)
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/* sign-extend an 8-bit number */
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#define SEXT8(x) ((((x)&0xff)^(~0x7f))+0x80)
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/* sign-extend a 9-bit number */
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#define SEXT9(x) ((((x)&0x1ff)^(~0xff))+0x100)
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/* sign-extend a 16-bit number */
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#define SEXT16(x) ((((x)&0xffff)^(~0x7fff))+0x8000)
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/* sign-extend a 22-bit number */
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#define SEXT22(x) ((((x)&0x3fffff)^(~0x1fffff))+0x200000)
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/* sign-extend a 24-bit number */
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#define SEXT24(x) ((((x)&0xffffff)^(~0x7fffff))+0x800000)
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#ifdef _WIN32
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#define SIGTRAP 5
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#define SIGQUIT 3
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#endif
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extern int max_mem;
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#define load_mem_big(addr,len) \
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(len == 1 ? *(((addr) & 0xffffff) + State.mem) : \
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len == 2 ? ((*(((addr) & 0xffffff) + State.mem) << 8) \
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| *((((addr) + 1) & 0xffffff) + State.mem)) : \
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((*(((addr) & 0xffffff) + State.mem) << 16) \
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| (*((((addr) + 1) & 0xffffff) + State.mem) << 8) \
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| *((((addr) + 2) & 0xffffff) + State.mem)))
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static INLINE uint32
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load_byte (addr)
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SIM_ADDR addr;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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return p[0];
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}
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static INLINE uint32
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load_half (addr)
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SIM_ADDR addr;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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return p[1] << 8 | p[0];
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}
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static INLINE uint32
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load_3_byte (addr)
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SIM_ADDR addr;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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return p[2] << 16 | p[1] << 8 | p[0];
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}
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static INLINE uint32
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load_word (addr)
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SIM_ADDR addr;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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return p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
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}
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static INLINE uint32
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load_mem (addr, len)
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SIM_ADDR addr;
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int len;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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switch (len)
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{
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case 1:
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return p[0];
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case 2:
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return p[1] << 8 | p[0];
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case 3:
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return p[2] << 16 | p[1] << 8 | p[0];
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case 4:
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return p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
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default:
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abort ();
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}
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}
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static INLINE void
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store_byte (addr, data)
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SIM_ADDR addr;
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uint32 data;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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p[0] = data;
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}
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static INLINE void
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store_half (addr, data)
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SIM_ADDR addr;
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uint32 data;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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p[0] = data;
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p[1] = data >> 8;
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}
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static INLINE void
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store_3_byte (addr, data)
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SIM_ADDR addr;
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uint32 data;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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p[0] = data;
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p[1] = data >> 8;
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p[2] = data >> 16;
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}
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static INLINE void
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store_word (addr, data)
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SIM_ADDR addr;
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uint32 data;
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{
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uint8 *p = (addr & 0xffffff) + State.mem;
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#ifdef CHECK_ADDR
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if ((addr & 0xffffff) > max_mem)
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abort ();
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#endif
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p[0] = data;
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p[1] = data >> 8;
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p[2] = data >> 16;
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p[3] = data >> 24;
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}
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/* Function declarations. */
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uint32 get_word PARAMS ((uint8 *));
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void put_word PARAMS ((uint8 *, uint32));
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extern uint8 *map PARAMS ((SIM_ADDR addr));
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