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Added print debug info, .write_byte and .read_byte to cpu, with boundary check and rewrote the test program to use those.

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This commit is contained in:
SamsonLib 2025-06-14 13:23:11 +02:00
parent e6829ef94c
commit cb485588cd
2 changed files with 31 additions and 7 deletions
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23
core/ARM/cpu.h
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@ -11,7 +11,28 @@ struct CPU {
CPU() { std::memset(memory, 0, MEM_SIZE); }
uint64_t& x(int i) { return regs[i]; }
uint64_t &x(int i) { return regs[i]; }
uint8_t read_byte(uint64_t addr) {
if (addr >= MEM_SIZE) {
printf("%s out of bounds\n", addr);
}
return memory[addr];
}
void write_byte(uint64_t addr, uint8_t byte) {
if (addr >= MEM_SIZE) {
printf("%s out of bounds\n", addr);
}
memory[addr] = byte;
}
void print_debug_information() {
printf("PC = %lu\n", pc);
for (int reg = 0; reg < 32; reg++) {
printf("X%i = %lu\n", reg, x(reg)); // X0 = 0...
}
}
};
#endif

15
ui/main.cpp
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@ -3,20 +3,23 @@
#include <cstdio>
int main()
{
int main() {
CPU cpu;
cpu.pc = 0;
// Simple ARMv8 program in memory (MOVZ X0, #5; ADD X0, X0, #3; RET)
// These are placeholders; real encoding will be parsed later
cpu.memory[0] = 0x05; // MOVZ placeholder
cpu.memory[4] = 0x03; // ADD placeholder
cpu.memory[8] = 0xFF; // RET placeholder
cpu.write_byte(0, 0x05); // MOVZ placeholder
cpu.write_byte(4, 0x03); // ADD placeholder
cpu.write_byte(8, 0xFF); // RET placeholder
printf("%u\n", cpu.read_byte(0));
JIT jit;
jit.translate_and_run(cpu);
printf("X0 = %llu\n", cpu.regs[0]);
cpu.print_debug_information();
printf("X0 = %lu\n", cpu.x(0));
return 0;
}