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zladbzladb
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컴퓨터구조 - P2
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15 files changed

+349
-0
lines changed

‎add_test.asm

+4
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addi x16, x0, 10
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addi x17, x0, 20
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add x18, x16, x17
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addi x9, x0, 10

‎add_test.hex

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00a00813
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01400893
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01180933
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00a00493

‎addi_test.asm

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addi x0, x0, 10
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addi x1, x0, 10
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addi x2, x0, 10
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addi x3, x0, 10
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addi x4, x0, 10
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addi x5, x0, 10
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addi x6, x0, 10
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addi x7, x0, 10
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addi x8, x0, 10
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addi x10, x0, 10
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addi x11, x0, 10
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addi x12, x0, 10
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addi x13, x0, 10
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addi x14, x0, 10
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addi x15, x0, 10
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addi x16, x0, 10
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addi x17, x0, 10
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addi x18, x0, 10
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addi x19, x0, 10
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addi x20, x0, 10
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addi x21, x0, 10
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addi x22, x0, 10
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addi x23, x0, 10
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addi x24, x0, 10
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addi x25, x0, 10
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addi x26, x0, 10
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addi x27, x0, 10
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addi x28, x0, 10
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addi x29, x0, 10
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addi x30, x0, 10
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addi x31, x0, 10
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addi x9, x0, 10

‎addi_test.hex

+32
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00a00013
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00a00093
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00a00113
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00a00193
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00a00213
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00a00293
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00a00313
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00a00393
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00a00413
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00a00513
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00a00593
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00a00613
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00a00693
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00a00713
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00a00793
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00a00813
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00a00893
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00a00913
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00a00993
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00a00a13
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00a00a93
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00a00b13
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00a00b93
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00a00c13
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00a00c93
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00a00d13
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00a00d93
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00a00e13
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00a00e93
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00a00f13
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00a00f93
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00a00493

‎beq_test.asm

+5
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addi x16, x0, 30
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addi x17, x0, 30
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beq x16, x17, L1
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addi x18, x0, 10
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L1: addi x9, x0, 10

‎beq_test.hex

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01e00813
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01e00893
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01180463
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00a00913
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00a00493

‎jal_test.asm

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jal x1, L
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addi x16, x0, 10
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L: addi x17, x0, 20
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addi x9, x0, 10
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‎jal_test.hex

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008000ef
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00a00813
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01400893
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00a00493

‎jalr_test.asm

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jal x31, L
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jal x0, END
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addi x16, x0, 10
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L: addi x16, x0, 10
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addi x17, x0, 20
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jalr x0, 0(x31)
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addi x18, x0, 20
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END: addi x19, x0, 20
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addi x9, x0, 10

‎jalr_test.hex

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00c00fef
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0180006f
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00a00813
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00a00813
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01400893
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000f8067
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01400913
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01400993
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00a48493

‎riscv_sim.c

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#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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//clock cycles
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long long cycles = 0;
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// registers
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long long int regs[32];
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// program counter
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unsigned long pc = 0;
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// memory
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#define INST_MEM_SIZE 32*1024
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#define DATA_MEM_SIZE 32*1024
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unsigned long inst_mem[INST_MEM_SIZE]; //instruction memory
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unsigned long long data_mem[DATA_MEM_SIZE]; //data memory
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//misc. function
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int init(char* filename);
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void print_cycles();
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void print_reg();
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void print_pc();
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//fetch an instruction from a instruction memory
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void fetch() {
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}
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//decode the instruction and read data from register file
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void decode() {
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}
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//perform the appropriate operation
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void exe() {
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}
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//access the data memory
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void mem() {
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}
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//write result of arithmetic operation or data read from the data memory if required
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void wb() {
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}
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int main(int ac, char* av[])
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{
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if (ac < 3)
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{
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printf("./riscv_sim filename mode\n");
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return -1;
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}
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char done = 0;
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if (init(av[1]) != 0)
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return -1;
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while (!done)
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{
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fetch();
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decode();
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exe();
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mem();
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wb();
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cycles++; //increase clock cycle
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//if debug mode, print clock cycle, pc, reg
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if (*av[2] == '0') {
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print_cycles(); //print clock cycles
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print_pc(); //print pc
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print_reg(); //print registers
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}
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// check the exit condition, do not delete!!
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if (regs[9] == 10) //if value in $t1 is 10, finish the simulation
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done = 1;
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}
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if (*av[2] == '1')
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{
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print_cycles(); //print clock cycles
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print_pc(); //print pc
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print_reg(); //print registers
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}
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return 0;
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}
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/* initialize all datapat elements
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//fill the instruction and data memory
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//reset the registers
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*/
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int init(char* filename)
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{
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FILE* fp = fopen(filename, "r");
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int i;
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long inst;
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if (fp == NULL)
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{
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fprintf(stderr, "Error opening file.\n");
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return -1;
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}
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/* fill instruction memory */
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i = 0;
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while (fscanf(fp, "%lx", &inst) == 1)
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{
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inst_mem[i++] = inst;
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}
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/*reset the registers*/
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for (i = 0; i < 32; i++)
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{
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regs[i] = 0;
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}
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/*reset pc*/
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pc = 0;
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/*reset clock cycles*/
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cycles = 0;
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return 0;
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}
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void print_cycles()
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{
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printf("---------------------------------------------------\n");
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printf("Clock cycles = %lld\n", cycles);
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}
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void print_pc()
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{
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printf("PC = %ld\n\n", pc);
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}
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void print_reg()
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{
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printf("x0 = %d\n", regs[0]);
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printf("x1 = %d\n", regs[1]);
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printf("x2 = %d\n", regs[2]);
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printf("x3 = %d\n", regs[3]);
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printf("x4 = %d\n", regs[4]);
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printf("x5 = %d\n", regs[5]);
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printf("x6 = %d\n", regs[6]);
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printf("x7 = %d\n", regs[7]);
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printf("x8 = %d\n", regs[8]);
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printf("x9 = %d\n", regs[9]);
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printf("x10 = %d\n", regs[10]);
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printf("x11 = %d\n", regs[11]);
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printf("x12 = %d\n", regs[12]);
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printf("x13 = %d\n", regs[13]);
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printf("x14 = %d\n", regs[14]);
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printf("x15 = %d\n", regs[15]);
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printf("x16 = %d\n", regs[16]);
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printf("x17 = %d\n", regs[17]);
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printf("x18 = %d\n", regs[18]);
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printf("x19 = %d\n", regs[19]);
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printf("x20 = %d\n", regs[20]);
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printf("x21 = %d\n", regs[21]);
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printf("x22 = %d\n", regs[22]);
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printf("x23 = %d\n", regs[23]);
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printf("x24 = %d\n", regs[24]);
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printf("x25 = %d\n", regs[25]);
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printf("x26 = %d\n", regs[26]);
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printf("x27 = %d\n", regs[27]);
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printf("x28 = %d\n", regs[28]);
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printf("x29 = %d\n", regs[29]);
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printf("x30 = %d\n", regs[30]);
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printf("x31 = %d\n", regs[31]);
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printf("\n");
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}

‎runme.asm

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main:
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addi x2, x0, 800
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addi x10, x0, 10 #n=10
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jal x1, accum #call accum
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jal x0, exit #exit
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accum:
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addi x2, x2, -16 #adjust sp
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sd x1, 8(x2) #push return address
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sd x10, 0(x2) #push n
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addi x5, x10, -1 #t=n-1
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beq x0, x0, L1
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L2: addi x10, x0, 1 #r=1
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addi x2, x2, 16 #adjust sp
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jalr x0 0(x1) #return to caller
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L1: beq x5, x0, L2 #if n==0?
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addi x10, x10, -1 #t=n-1
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jal x1 accum #call fact
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addi x6, x10, 0 #t1=n
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ld x10, 0(x2) #pop n
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ld x1, 8(x2) #pop return address
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addi x2, x2, 16 #adjust sp
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add x10, x10, x6 #n+accum(n-1)
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jalr x0, 0(x1) #return to caller
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exit: addi x9, x0, 10

‎runme.hex

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32000113
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00a00513
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008000ef
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0480006f
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ff010113
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00113423
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00a13023
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fff50293
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00000863
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00100513
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01010113
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00008067
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fe028ae3
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fff50513
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fd9ff0ef
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00050313
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00013503
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00813083
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01010113
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00650533
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00008067
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00a00493

‎sd_ld_test.asm

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addi x29, x29, 0
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addi x4, x0, 30
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sd x4, 8(x29)
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ld x16, 8(x29)
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addi x9, x0, 10

‎sd_ld_test.hex

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00000e93
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01e00213
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004eb423
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008eb803
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00a00493

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