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#include "../../include/mips.h"
#include "test_mips_ymh15.hpp"
#include <iostream>
using namespace std;
int main() {
mips_mem_h ram = mips_mem_create_ram(4096);
mips_cpu_h cpu = mips_cpu_create(ram);
srand(time(NULL));
mips_test_begin_suite();
int testId = mips_test_begin_test("ADD");
mips_test_end_test(testId, test_add(ram, cpu, ADD, 0x3fffffff, 0, 10), "Testing the adder without overflow");
testId = mips_test_begin_test("ADD");
mips_test_end_test(testId, !test_add(ram, cpu, ADD, 0x7fffffff, 1, 1), "Testing the adder with overflow");
testId = mips_test_begin_test("ADDU");
mips_test_end_test(testId, test_add(ram, cpu, ADDU, 0x3fffffff, 0, 10), "testing without overflow");
testId = mips_test_begin_test("ADDU");
mips_test_end_test(testId, test_add(ram, cpu, ADDU, 0x7fffffff, 1, 1), "Testing the adder with overflow");
testId = mips_test_begin_test("SUB");
mips_test_end_test(testId, test_add(ram, cpu, SUB, 0x3fffffff, 0, 10), "Testing the adder without overflow");
testId = mips_test_begin_test("SUB");
mips_test_end_test(testId, !test_add(ram, cpu, SUB, 0x7fffffff, 1, 1), "Testing the adder with overflow");
testId = mips_test_begin_test("SUBU");
mips_test_end_test(testId, test_add(ram, cpu, SUBU, 0x3fffffff, 0, 10), "Testing the adder without overflow");
testId = mips_test_begin_test("SUBU");
mips_test_end_test(testId, test_add(ram, cpu, SUBU, 0x7fffffff, 1, 1), "Testing the adder with overflow");
testId = mips_test_begin_test("AND");
mips_test_end_test(testId, test_bitwise(ram, cpu, AND), "Testing bitwise and");
testId = mips_test_begin_test("OR");
mips_test_end_test(testId, test_bitwise(ram, cpu, OR), "Testing bitwise or");
testId = mips_test_begin_test("XOR");
mips_test_end_test(testId, test_bitwise(ram, cpu, XOR), "Testing bitwise xor");
mips_test_end_suite();
return 0;
}
// R Type
uint32_t gen_instruction(uint32_t src1, uint32_t src2, uint32_t dest,
uint32_t shift, uint32_t function) {
uint32_t inst = 0;
inst = inst | src1 << 21 | src2 << 16 | dest << 11 | shift << 6 |
function;
return inst;
}
// I Type
uint32_t gen_instruction(uint32_t opcode, uint32_t src, uint32_t dest,
uint32_t Astart) {
uint32_t inst = 0;
inst = inst | opcode << 26 | src << 21 | dest << 16 | Astart;
return inst;
}
// J Type
uint32_t gen_instruction(uint32_t opcode, uint32_t memory) {
uint32_t inst = 0;
inst = inst | opcode << 26 | memory;
return inst;
}
uint32_t change_endianness(uint32_t inst) {
inst = (inst << 24 | ((inst << 8)&0xff0000) |
((inst >> 8)&0xff00) |inst >> 24);
return inst;
}
int test_add(mips_mem_h ram, mips_cpu_h cpu, uint32_t type, uint32_t max, uint8_t value, unsigned i_t) {
uint32_t inst, ans, a, b;
for(unsigned i = 0; i < i_t; ++i) {
mips_error mips_err;
mips_cpu_reset(cpu);
inst = gen_instruction(9, 10, 8, 0, type);
if(value) {
a = max;
if(type > 0x21) {
b = -max;
} else {
b = max;
}
} else {
a = rand() % max;
b = rand() % max;
}
mips_mem_write(ram, 0, 4, (uint8_t*)&inst);
mips_cpu_set_register(cpu, 9, a);
mips_cpu_set_register(cpu, 10, b);
mips_err = mips_cpu_step(cpu);
mips_cpu_get_register(cpu, 8, &ans);
if(type < 0x22) {
printf("%#10x + %#10x = %#10x\n", a, b, ans);
if(mips_err == mips_ExceptionArithmeticOverflow || a+b!=ans) {
return 0;
}
} else {
printf("%#10x - %#10x = %#10x\n", a, b, ans);
if(mips_err == mips_ExceptionArithmeticOverflow || a-b!=ans) {
return 0;
}
}
}
return 1;
}
int test_bitwise(mips_mem_h ram, mips_cpu_h cpu, uint8_t op) {
uint32_t a, b, ans, inst;
int passed;
for(unsigned i = 0; i < 10; ++i) {
passed = 0;
mips_cpu_reset(cpu);
inst = gen_instruction(8, 9, 7, 0, op);
a = rand() % 0xffffffff;
b = rand() % 0xffffffff;
mips_mem_write(ram, 0, 4, (uint8_t*)&inst);
mips_cpu_set_register(cpu, 8, a);
mips_cpu_set_register(cpu, 9, b);
mips_error mips_err = mips_cpu_step(cpu);
mips_cpu_get_register(cpu, 7, &ans);
if(op == AND) {
printf("%#10x & %#10x = %#10x\n", a, b, ans);
if((a & b) == ans) {
passed = 1;
}
} else if(op == OR) {
printf("%#10x | %#10x = %#10x\n", a, b, ans);
if((a | b) == ans) {
passed = 1;
}
} else {
printf("%#10x ^ %#10x = %#10x\n", a, b, ans);
if((a ^ b) == ans) {
passed = 1;
}
}
if(mips_err != mips_Success || !passed) {
return 0;
}
}
return 1;
}
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