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Commit 07082b9d authored by lang0909's avatar lang0909
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Add run.c

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Stage: test
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/***************************************************************/
/* */
/* MIPS-32 Instruction Level Simulator */
/* */
/* SCE212 Ajou University */
/* run.c */
/* Adapted from CS311@KAIST */
/* */
/***************************************************************/
#include <stdio.h>
#include "util.h"
#include "run.h"
/***************************************************************/
/* */
/* Procedure: get_inst_info */
/* */
/* Purpose: Read insturction information */
/* */
/***************************************************************/
instruction* get_inst_info(uint32_t pc)
{
return &INST_INFO[(pc - MEM_TEXT_START) >> 2];
}
/***************************************************************/
/* */
/* Procedure: process_instruction */
/* */
/* Purpose: Process one instrction */
/* */
/***************************************************************/
void process_instruction()
{
/** Implement this function */
if(INST_INFO[INSTRUCTION_COUNT].value!=1)
{
RUN_BIT = 0;
return;
}
switch(INST_INFO[INSTRUCTION_COUNT].opcode)
{
case 0:
if(INST_INFO[INSTRUCTION_COUNT].func_code==33)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] + CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt];
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==36)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] & CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt];
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==39)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]
= ~(CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] | CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]);
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==37)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]
= (CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] | CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]);
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==43)
{
if(CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs]<CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt])
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]=1;
}
else
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]=0;
}
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==0)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt] << INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.shamt;
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==2)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt] >> INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.shamt;
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==35)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.r.rd]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] - CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt];
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
if(INST_INFO[INSTRUCTION_COUNT].func_code==8) //need change
{
INSTRUCTION_COUNT
= (CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs]-MEM_TEXT_START-4)/4;
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
}
case 9:
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] + INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm;
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
case 12:
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] & INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm;
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
case 15:
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]
= INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm<<16;
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
case 13:
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]
= CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs] | INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm;
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
case 11:
if(CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs]<INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm)
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]=1;
}
else
{
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]=0;
}
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
case 35:
CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]
= mem_read_32(CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs]+INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm);
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
case 43:
mem_write_32(CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs]
+INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm,CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt]);
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
break;
case 4:
if(CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs]==CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt])
{
INSTRUCTION_COUNT = INSTRUCTION_COUNT + INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm;
CURRENT_STATE.PC = CURRENT_STATE.PC + INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm*4;
}
else
{
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
}
break;
case 5:
if(CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rs]!=CURRENT_STATE.REGS[INST_INFO[INSTRUCTION_COUNT].r_t.r_i.rt])
{
INSTRUCTION_COUNT = INSTRUCTION_COUNT + INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm;
CURRENT_STATE.PC = CURRENT_STATE.PC + INST_INFO[INSTRUCTION_COUNT].r_t.r_i.r_i.imm*4;
}
else
{
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4+4;
}
break;
case 2:
CURRENT_STATE.PC = INST_INFO[INSTRUCTION_COUNT].r_t.target + 4;
INSTRUCTION_COUNT = (INST_INFO[INSTRUCTION_COUNT].r_t.target*4 - MEM_TEXT_START)/4;
break;
case 3:
CURRENT_STATE.REGS[31] = (MEM_TEXT_START + INSTRUCTION_COUNT*4+8);
CURRENT_STATE.PC = MEM_TEXT_START + INSTRUCTION_COUNT*4;
INSTRUCTION_COUNT = (INST_INFO[INSTRUCTION_COUNT].r_t.target*4 - MEM_TEXT_START)/4-1;
break;
}
}
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