1 /* 2 3 Copyright 2021, dettus@dettus.net 4 5 Redistribution and use in source and binary forms, with or without modification, 6 are permitted provided that the following conditions are met: 7 8 1. Redistributions of source code must retain the above copyright notice, this 9 list of conditions and the following disclaimer. 10 11 2. Redistributions in binary form must reproduce the above copyright notice, 12 this list of conditions and the following disclaimer in the documentation 13 and/or other materials provided with the distribution. 14 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 16 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 19 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 26 27 */ 28 29 #ifndef VM68K_LOADSTORE_H 30 #define VM68K_LOADSTORE_H 31 32 #include "vm68k_datatypes.h" 33 // some helper defines 34 #define DATAREGADDR(addr) (-((addr)+ 1)) 35 #define ADDRREGADDR(addr) (-((addr)+10)) 36 37 #define VM68K_LEGAL_AM_DATAREG (1<< 1) 38 #define VM68K_LEGAL_AM_ADDRREG (1<< 2) 39 #define VM68K_LEGAL_AM_INDIR (1<< 3) 40 #define VM68K_LEGAL_AM_POSTINC (1<< 4) 41 #define VM68K_LEGAL_AM_PREDEC (1<< 5) 42 #define VM68K_LEGAL_AM_DISP16 (1<< 6) 43 #define VM68K_LEGAL_AM_INDEX (1<< 7) 44 45 #define VM68K_LEGAL_AMX_W (1<< 8) 46 #define VM68K_LEGAL_AMX_L (1<< 9) 47 #define VM68K_LEGAL_AMX_DATA (1<<10) 48 #define VM68K_LEGAL_AMX_PC (1<<11) 49 #define VM68K_LEGAL_AMX_INDEX_PC (1<<12) 50 51 #define VM68K_LEGAL_CONTROLALTERATEADDRESSING (VM68K_LEGAL_AM_INDIR|VM68K_LEGAL_AM_DISP16|VM68K_LEGAL_AM_INDEX|VM68K_LEGAL_AMX_W|VM68K_LEGAL_AMX_L|VM68K_LEGAL_AMX_PC|VM68K_LEGAL_AMX_INDEX_PC) 52 #define VM68K_LEGAL_CONTROLADDRESSING (VM68K_LEGAL_AM_INDIR|VM68K_LEGAL_AM_DISP16|VM68K_LEGAL_AM_INDEX|VM68K_LEGAL_AMX_W|VM68K_LEGAL_AMX_L|VM68K_LEGAL_AMX_PC|VM68K_LEGAL_AMX_INDEX_PC) 53 #define VM68K_LEGAL_DATAADDRESSING ( VM68K_LEGAL_AM_DATAREG| VM68K_LEGAL_AM_INDIR| VM68K_LEGAL_AM_POSTINC| VM68K_LEGAL_AM_PREDEC| VM68K_LEGAL_AM_DISP16| VM68K_LEGAL_AM_INDEX| VM68K_LEGAL_AMX_W| VM68K_LEGAL_AMX_L| VM68K_LEGAL_AMX_DATA| VM68K_LEGAL_AMX_PC| VM68K_LEGAL_AMX_INDEX_PC ) 54 #define VM68K_LEGAL_ALL ( VM68K_LEGAL_AM_DATAREG| VM68K_LEGAL_AM_ADDRREG| VM68K_LEGAL_AM_INDIR| VM68K_LEGAL_AM_POSTINC| VM68K_LEGAL_AM_PREDEC| VM68K_LEGAL_AM_DISP16| VM68K_LEGAL_AM_INDEX| VM68K_LEGAL_AMX_W| VM68K_LEGAL_AMX_L| VM68K_LEGAL_AMX_DATA| VM68K_LEGAL_AMX_PC| VM68K_LEGAL_AMX_INDEX_PC ) 55 #define VM68K_LEGAL_DATAALTERATE ( VM68K_LEGAL_AM_DATAREG|VM68K_LEGAL_AM_INDIR|VM68K_LEGAL_AM_POSTINC| VM68K_LEGAL_AM_PREDEC| VM68K_LEGAL_AM_DISP16| VM68K_LEGAL_AM_INDEX| VM68K_LEGAL_AMX_W| VM68K_LEGAL_AMX_L) 56 #define VM68K_LEGAL_MEMORYALTERATE ( VM68K_LEGAL_AM_INDIR|VM68K_LEGAL_AM_POSTINC| VM68K_LEGAL_AM_PREDEC| VM68K_LEGAL_AM_DISP16| VM68K_LEGAL_AM_INDEX| VM68K_LEGAL_AMX_W| VM68K_LEGAL_AMX_L) 57 #define VM68K_LEGAL_ALTERABLEADRESSING (VM68K_LEGAL_AM_DATAREG|VM68K_LEGAL_AM_ADDRREG|VM68K_LEGAL_AM_INDIR|VM68K_LEGAL_AM_POSTINC|VM68K_LEGAL_AM_PREDEC|VM68K_LEGAL_AM_DISP16|VM68K_LEGAL_AM_INDEX| VM68K_LEGAL_AMX_W|VM68K_LEGAL_AMX_L) 58 59 60 61 #define FLAGC (1<<0) 62 #define FLAGV (1<<1) 63 #define FLAGZ (1<<2) 64 #define FLAGN (1<<3) 65 #define FLAGX (1<<4) 66 #define FLAGCZCLR (1<<5) // when set, the c and z flag are always cleared. 67 68 #define FLAGS_ALL (FLAGC|FLAGV|FLAGZ|FLAGN|FLAGX) 69 #define FLAGS_LOGIC (FLAGZ|FLAGN|FLAGCZCLR) 70 71 // this function is calculating the number of bytes for a datatype 72 int vm68k_getbytesize(tVM68k_types size); 73 74 // this function is translating the addressmode/registerpair into a memory address 75 int vm68k_resolve_ea(tVM68k* pVM68k,tVM68k_next *pNext,tVM68k_types size, 76 tVM68k_addrmodes addrmode,tVM68k_ubyte reg, 77 tVM68k_uword legal,tVM68k_slong* ea); 78 79 // this function is loading the operand 80 int vm68k_fetchoperand(tVM68k* pVM68k,tVM68k_bool extendsign,tVM68k_types size,tVM68k_slong ea,tVM68k_ulong* operand); 81 82 // this function is calculting the status flags 83 int vm68k_calculateflags(tVM68k_next* pNext,tVM68k_ubyte flagmask,tVM68k_types size,tVM68k_ulong operand1,tVM68k_ulong operand2,tVM68k_uint64 result); 84 85 int vm68k_calculateflags2(tVM68k_next* pNext,tVM68k_ubyte flagmask,tVM68k_instruction instruction,tVM68k_types datatype,tVM68k_ulong operand1,tVM68k_ulong operand2,tVM68k_uint64 result); 86 87 // this function is storing the result of the operation. 88 int vm68k_storeresult(tVM68k* pVM68k,tVM68k_next* pNext,tVM68k_types size,tVM68k_slong ea,tVM68k_ulong result); 89 90 91 92 #endif 93