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cpu

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This commit is contained in:
Rose Apollo 2024-04-19 12:39:59 +00:00
parent e6e01700f7
commit 062b44b4f1
4 changed files with 31 additions and 4 deletions
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25
emu/cpu.c
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@ -1,14 +1,39 @@
#include "cpu.h" #include "cpu.h"
#include <stdbool.h> #include <stdbool.h>
void GetInstructionAndArgs(r16_int *instruct, r16_int *a1, r16_int *a2,
ArgumentInfo *a1i, ArgumentInfo *a2i)
{
r16_int tmpInstruct, tmpPC;
tmpPC = GetRegister(PC);
tmpInstruct = GetValue(tmpPC);
tmpPC.u++;
*a1 = GetValue(tmpPC);
tmpPC.u++;
*a2 = GetValue(tmpPC);
tmpPC.u++;
SetRegister(PC, tmpPC);
*instruct = (r16_int){ tmpInstruct.u & INSTRUCTION_BIT_MASK };
*a1i = (ArgumentInfo)((tmpInstruct.u & INSTRUCTION_ARG_1_INFO_MASK) >> 12);
*a2i = (ArgumentInfo)((tmpInstruct.u & INSTRUCTION_ARG_2_INFO_MASK) >> 14);
}
void Run(r16_int entry) void Run(r16_int entry)
{ {
r16_int instruction, arg1, arg2; r16_int instruction, arg1, arg2;
ArgumentInfo arg1Info, arg2Info;
SetRegister(PC, entry); SetRegister(PC, entry);
while (true) while (true)
{ {
GetInstructionAndArgs(&instruction, &arg1, &arg2, &arg1Info, &arg2Info);
ExecuteInstruction((CpuInstructions)instruction.u, arg1Info, arg2Info, arg1, arg2);
} }
} }

2
emu/cpu.h
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@ -6,4 +6,6 @@
#include "cpu/register.h" #include "cpu/register.h"
#include "cpu/instruction.h" #include "cpu/instruction.h"
void Run(r16_int entry);
#endif #endif

6
emu/cpu_const.h
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@ -51,8 +51,8 @@ typedef enum
pointerInRegister = 0x3 pointerInRegister = 0x3
} ArgumentInfo; } ArgumentInfo;
#define INSTRUCTION_BIT_MASK 0b1111111100000000 #define INSTRUCTION_BIT_MASK 0b0000000011111111
#define INSTRUCTION_ARG_1_INFO_MASK 0b0000000000001100 #define INSTRUCTION_ARG_1_INFO_MASK 0b0011000000000000
#define INSTRUCTION_ARG_2_INFO_MASK 0b0000000000000011 #define INSTRUCTION_ARG_2_INFO_MASK 0b1100000000000000
#endif #endif

2
emu/main.c
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@ -2,9 +2,9 @@
#include <stdlib.h> #include <stdlib.h>
#include <stdint.h> #include <stdint.h>
#include <stdbool.h> #include <stdbool.h>
#include "../lib/carg-parse/carg-parse.h" #include "../lib/carg-parse/carg-parse.h"
#include "./cpu_const.h" #include "./cpu_const.h"
#include "./cpu.h"
int main(int argc, char **argv) int main(int argc, char **argv)
{ {