/* -*-c-*- -------------------- mix_ins.h: * This file declares types and functions for manipulating MIX * instructions * ------------------------------------------------------------------ * Copyright (C) 2000 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ #ifndef MIX_INS_H #define MIX_INS_H #include "mix_types.h" /* Initialise and free mix_ins data */ extern void mix_init_ins(void); extern void mix_release_ins(void); /* A MIX instruction is made up of address, index, fspec and op_code */ /*-- Address field: contains two bytes */ typedef mix_short_t mix_address_t; /*-- Index field: a value between 0 and 6 */ typedef enum { mix_I0, mix_I1, mix_I2, mix_I3, mix_I4, mix_I5, mix_I6 } mix_index_t; /*-- Instruction id: enumeration of MIX instruction set */ typedef enum { mix_NOP, mix_ADD, mix_SUB, mix_MUL, mix_DIV, mix_NUM, mix_CHAR, mix_HLT, mix_SLA, mix_SRA, mix_SLAX, mix_SRAX, mix_SLC, mix_SRC, mix_MOVE, mix_LDA, mix_LD1, mix_LD2, mix_LD3, mix_LD4, mix_LD5, mix_LD6, mix_LDX, mix_LDAN, mix_LD1N, mix_LD2N, mix_LD3N, mix_LD4N, mix_LD5N, mix_LD6N, mix_LDXN, mix_STA, mix_ST1, mix_ST2, mix_ST3, mix_ST4, mix_ST5, mix_ST6, mix_STX, mix_STJ, mix_STZ, mix_JBUS, mix_IOC, mix_IN, mix_OUT, mix_JRED, mix_JMP, mix_JSJ, mix_JOV, mix_JNOV, mix_JL, mix_JE, mix_JG, mix_JGE, mix_JNE, mix_JLE, mix_JAN, mix_JAZ, mix_JAP, mix_JANN, mix_JANZ, mix_JANP, mix_J1N, mix_J1Z, mix_J1P, mix_J1NN, mix_J1NZ, mix_J1NP, mix_J2N, mix_J2Z, mix_J2P, mix_J2NN, mix_J2NZ, mix_J2NP, mix_J3N, mix_J3Z, mix_J3P, mix_J3NN, mix_J3NZ, mix_J3NP, mix_J4N, mix_J4Z, mix_J4P, mix_J4NN, mix_J4NZ, mix_J4NP, mix_J5N, mix_J5Z, mix_J5P, mix_J5NN, mix_J5NZ, mix_J5NP, mix_J6N, mix_J6Z, mix_J6P, mix_J6NN, mix_J6NZ, mix_J6NP, mix_JXN, mix_JXZ, mix_JXP, mix_JXNN, mix_JXNZ, mix_JXNP, mix_INCA, mix_DECA, mix_ENTA, mix_ENNA, mix_INC1, mix_DEC1, mix_ENT1, mix_ENN1, mix_INC2, mix_DEC2, mix_ENT2, mix_ENN2, mix_INC3, mix_DEC3, mix_ENT3, mix_ENN3, mix_INC4, mix_DEC4, mix_ENT4, mix_ENN4, mix_INC5, mix_DEC5, mix_ENT5, mix_ENN5, mix_INC6, mix_DEC6, mix_ENT6, mix_ENN6, mix_INCX, mix_DECX, mix_ENTX, mix_ENNX, mix_CMPA, mix_CMP1, mix_CMP2, mix_CMP3, mix_CMP4, mix_CMP5, mix_CMP6, mix_CMPX, mix_INVALID_INS } mix_ins_id_t; /* each one of the above id's has associated an opcode, a default fspec and a string representation */ /* the opcode fits in a byte */ typedef mix_byte_t mix_opcode_t; /* labels for each opcode */ enum { mix_opNOP = 0, mix_opADD, mix_opSUB, mix_opMUL, mix_opDIV, mix_opSPC, mix_opSLx, mix_opMOVE, mix_opLDA, mix_opLD1, mix_opLD2, mix_opLD3, mix_opLD4, mix_opLD5, mix_opLD6, mix_opLDX, mix_opLDAN, mix_opLD1N, mix_opLD2N, mix_opLD3N, mix_opLD4N, mix_opLD5N, mix_opLD6N, mix_opLDXN, mix_opSTA, mix_opST1, mix_opST2, mix_opST3, mix_opST4, mix_opST5, mix_opST6, mix_opSTX, mix_opSTJ, mix_opSTZ, mix_opJBUS, mix_opIOC, mix_opIN, mix_opOUT, mix_opJRED, mix_opJMP, mix_opJAx, mix_opJ1x, mix_opJ2x, mix_opJ3x, mix_opJ4x, mix_opJ5x, mix_opJ6x, mix_opJXx, mix_opINCA, mix_opINC1, mix_opINC2, mix_opINC3, mix_opINC4, mix_opINC5, mix_opINC6, mix_opINCX, mix_opCMPA, mix_opCMP1, mix_opCMP2, mix_opCMP3, mix_opCMP4, mix_opCMP5, mix_opCMP6, mix_opCMPX }; extern mix_opcode_t mix_get_opcode_from_id(mix_ins_id_t id); extern mix_fspec_t mix_get_fspec_from_id(mix_ins_id_t id); /* For extended instructions, both the opcode and fspec determine the id (i.e., an explicit fspec cannot be used) */ extern gboolean mix_ins_id_is_extended(mix_ins_id_t id); extern const gchar * mix_get_string_from_id(mix_ins_id_t id); extern mix_ins_id_t mix_get_id_from_string(const gchar *name); extern mix_ins_id_t mix_get_ins_id(mix_opcode_t code, mix_fspec_t fspec); /*-- MIX instruction type */ typedef struct mix_ins_t mix_ins_t; struct mix_ins_t { mix_address_t address; mix_index_t index; mix_fspec_t fspec; mix_opcode_t opcode; }; #define mix_ins_fill_from_id(ins,id) \ do { \ (ins).opcode = mix_get_opcode_from_id(id); \ (ins).fspec = mix_get_fspec_from_id(id); \ } while(FALSE) /* A mix ins can be codified into a word */ extern mix_word_t mix_ins_to_word(const mix_ins_t *ins); extern mix_ins_id_t mix_word_to_ins(mix_word_t w, mix_ins_t *ins); #define mix_word_add_address(word,addr) (word) |= ((addr)<<18) /* decompose an instruction codified in a word into its parts */ #define mix_get_ins_address(word) ((mix_address_t)((word)>>18)) #define mix_get_ins_index(word) ((mix_index_t)(((word)>>12)&7)) #define mix_get_ins_fspec(word) ((mix_fspec_t)(mix_byte_new((word)>>6))) #define mix_get_ins_opcode(word) ((mix_opcode_t)(mix_byte_new(word))) /* unchecked versions for speed */ #define mix_ins_to_word_uncheck(ins) \ (mix_word_t)(((ins).address<<18)| \ (((ins).index&7)<<12)|((ins).fspec<<6)|((ins).opcode)) #define mix_word_to_ins_uncheck(word,ins) \ do { \ (ins).address = mix_get_ins_address(word); \ (ins).index = mix_get_ins_index(word); \ (ins).fspec = mix_get_ins_fspec(word); \ (ins).opcode = mix_get_ins_opcode(word); \ } while(FALSE) #define mix_ins_id_from_ins(ins) mix_get_ins_id((ins).opcode,(ins).fspec) /* Printable representation */ extern gchar * /* this pointer must be freed by caller */ mix_ins_to_string(const mix_ins_t *ins); extern void mix_ins_to_string_in_buffer (const mix_ins_t *ins, gchar *buf, guint len); extern void mix_ins_print(const mix_ins_t *ins); /* A MIX ins has an associated execution time */ /* Initialise mix_ins data providing an interlock time for I/O devices */ /* --------------------------------------> MOVE to VM typedef guint mix_time_t; extern void mix_init_ins_with_interlock_time(mix_time_t t); extern mix_time_t mix_ins_exec_time(const mix_ins_t *ins); */ #endif /* MIX_INS_H */