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erc-c/tests/mos6502.c

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#include <criterion/criterion.h>
#include "mos6502.h"
#include "mos6502.enums.h"
#include "mos6502.tests.h"
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TestSuite(mos6502, .init = setup, .fini = teardown);
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/* Test(mos6502, free) */
Test(mos6502, create)
{
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cr_assert_neq(cpu, NULL);
cr_assert_eq(cpu->rmem->size, MOS6502_MEMSIZE);
cr_assert_eq(cpu->wmem->size, MOS6502_MEMSIZE);
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cr_assert_eq(cpu->PC, 0);
cr_assert_eq(cpu->A, 0);
cr_assert_eq(cpu->X, 0);
cr_assert_eq(cpu->Y, 0);
cr_assert_eq(cpu->P, 0);
cr_assert_eq(cpu->S, 0);
}
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Test(mos6502, push_stack)
{
mos6502_push_stack(cpu, 0x1234);
cr_assert_eq(mos6502_get(cpu, 0x0100), 0x34);
cr_assert_eq(mos6502_get(cpu, 0x0101), 0x12);
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}
Test(mos6502, pop_stack)
{
mos6502_push_stack(cpu, 0x1234);
cr_assert_eq(mos6502_pop_stack(cpu), 0x1234);
}
Test(mos6502, modify_status)
{
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mos6502_modify_status(cpu, MOS_NEGATIVE, 130);
cr_assert_eq(cpu->P & MOS_NEGATIVE, MOS_NEGATIVE);
mos6502_modify_status(cpu, MOS_NEGATIVE, 123);
cr_assert_neq(cpu->P & MOS_NEGATIVE, MOS_NEGATIVE);
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mos6502_modify_status(cpu, MOS_OVERFLOW, 123);
cr_assert_eq(cpu->P & MOS_OVERFLOW, MOS_OVERFLOW);
mos6502_modify_status(cpu, MOS_OVERFLOW, 44);
cr_assert_neq(cpu->P & MOS_OVERFLOW, MOS_OVERFLOW);
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mos6502_modify_status(cpu, MOS_CARRY, 23);
cr_assert_eq(cpu->P & MOS_CARRY, MOS_CARRY);
mos6502_modify_status(cpu, MOS_CARRY, 0);
cr_assert_neq(cpu->P & MOS_CARRY, MOS_CARRY);
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mos6502_modify_status(cpu, MOS_ZERO, 0);
cr_assert_eq(cpu->P & MOS_ZERO, MOS_ZERO);
mos6502_modify_status(cpu, MOS_ZERO, 1);
cr_assert_neq(cpu->P & MOS_ZERO, MOS_ZERO);
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}
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Test(mos6502, set_status)
{
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mos6502_set_status(cpu, MOS_BREAK | MOS_INTERRUPT | MOS_DECIMAL);
cr_assert_eq(cpu->P & (MOS_BREAK | MOS_INTERRUPT | MOS_DECIMAL), MOS_BREAK | MOS_INTERRUPT | MOS_DECIMAL);
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}
Test(mos6502, instruction)
{
cr_assert_eq(mos6502_instruction(0x1D), ORA);
cr_assert_eq(mos6502_instruction(0xD8), CLD);
cr_assert_eq(mos6502_instruction(0x98), TYA);
}
Test(mos6502, cycles)
{
cr_assert_eq(mos6502_cycles(cpu, 0x76), 6);
cr_assert_eq(mos6502_cycles(cpu, 0xBA), 2);
// In this case, we aren't cross a page boundary, and the number of
// cycles should stay at 4
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cpu->eff_addr = 0x5070;
cpu->X = 23;
cr_assert_eq(mos6502_cycles(cpu, 0x1D), 4);
// Testing that crossing a page boundary adds one to the number of
// cycles
cpu->X = 200;
cr_assert_eq(mos6502_cycles(cpu, 0x1D), 5);
}
Test(mos6502, get_instruction_handler)
{
cr_assert_eq(mos6502_get_instruction_handler(0x00), mos6502_handle_brk);
cr_assert_eq(mos6502_get_instruction_handler(0x1D), mos6502_handle_ora);
cr_assert_eq(mos6502_get_instruction_handler(0x20), mos6502_handle_jsr);
}
Test(mos6502, execute)
{
mos6502_set(cpu, 11, 34);
mos6502_set(cpu, 10, 0x69);
cpu->PC = 10;
mos6502_execute(cpu);
cr_assert_eq(cpu->A, 34);
}
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Test(mos6502, would_jump)
{
bool expect;
for (int inst = 0; inst <= TYA; inst++) {
switch (inst) {
case BCC:
case BCS:
case BEQ:
case BMI:
case BNE:
case BPL:
case BRK:
case BVC:
case BVS:
case JMP:
case JSR:
case RTS:
case RTI:
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expect = true;
break;
default:
expect = false;
break;
}
cr_assert_eq(mos6502_would_jump(inst), expect);
}
}
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Test(mos6502, get_address_resolver)
{
cr_assert_eq(mos6502_get_address_resolver(0x0A), mos6502_resolve_acc);
cr_assert_eq(mos6502_get_address_resolver(0x20), mos6502_resolve_abs);
cr_assert_eq(mos6502_get_address_resolver(0xBC), mos6502_resolve_abx);
cr_assert_eq(mos6502_get_address_resolver(0x19), mos6502_resolve_aby);
cr_assert_eq(mos6502_get_address_resolver(0xA0), mos6502_resolve_imm);
cr_assert_eq(mos6502_get_address_resolver(0x6C), mos6502_resolve_ind);
cr_assert_eq(mos6502_get_address_resolver(0x01), mos6502_resolve_idx);
cr_assert_eq(mos6502_get_address_resolver(0x11), mos6502_resolve_idy);
cr_assert_eq(mos6502_get_address_resolver(0x10), mos6502_resolve_rel);
cr_assert_eq(mos6502_get_address_resolver(0x05), mos6502_resolve_zpg);
cr_assert_eq(mos6502_get_address_resolver(0x15), mos6502_resolve_zpx);
cr_assert_eq(mos6502_get_address_resolver(0x96), mos6502_resolve_zpy);
}
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Test(mos6502, get)
{
vm_segment_set(cpu->wmem, 0, 123);
cr_assert_eq(mos6502_get(cpu, 0), 123);
}
Test(mos6502, get16)
{
vm_segment_set16(cpu->wmem, 0, 0x3344);
cr_assert_eq(mos6502_get16(cpu, 0), 0x3344);
}
Test(mos6502, set)
{
mos6502_set(cpu, 0, 111);
cr_assert_eq(vm_segment_get(cpu->rmem, 0), 111);
}
Test(mos6502, set16)
{
mos6502_set16(cpu, 0, 0x2255);
cr_assert_eq(vm_segment_get16(cpu->rmem, 0), 0x2255);
}
Test(mos6502, set_memory)
{
vm_segment *rmem, *wmem;
rmem = (vm_segment *)111;
wmem = (vm_segment *)222;
mos6502_set_memory(cpu, rmem, wmem);
cr_assert_eq(cpu->rmem, rmem);
cr_assert_eq(cpu->wmem, wmem);
}
Test(mos6502, last_executed)
{
vm_8bit opcode, operand;
vm_16bit addr;
mos6502_set(cpu, 0, 0xA9); // LDA #$EE
mos6502_set(cpu, 1, 0xEE);
mos6502_set(cpu, 2, 0x8D); // STA $1234
mos6502_set16(cpu, 3, 0x1234);
mos6502_execute(cpu);
mos6502_last_executed(cpu, &opcode, &operand, NULL);
cr_assert_eq(opcode, 0xA9);
cr_assert_eq(operand, 0xEE);
mos6502_execute(cpu);
mos6502_last_executed(cpu, &opcode, NULL, &addr);
cr_assert_eq(opcode, 0x8D);
cr_assert_eq(addr, 0x1234);
}