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erc-c/tests/mos6502.arith.c
2018-01-05 14:18:39 -06:00

123 lines
2.7 KiB
C

#include <criterion/criterion.h>
#include "mos6502.h"
#include "mos6502.enums.h"
#include "mos6502.tests.h"
TestSuite(mos6502_arith, .init = setup, .fini = teardown);
Test(mos6502_arith, adc)
{
cpu->A = 5;
mos6502_handle_adc(cpu, 3);
cr_assert_eq(cpu->A, 8);
cpu->P |= MOS_CARRY;
mos6502_handle_adc(cpu, 64);
cr_assert_eq(cpu->A, 73);
}
Test(mos6502_arith, cmp)
{
cpu->A = 5;
mos6502_handle_cmp(cpu, 3);
cr_assert_eq(cpu->P & MOS_CARRY, MOS_CARRY);
cr_assert_eq(cpu->P & MOS_NEGATIVE, 0);
cr_assert_eq(cpu->P & MOS_ZERO, 0);
cpu->A = 3;
mos6502_handle_cmp(cpu, 3);
cr_assert_eq(cpu->P & MOS_CARRY, 0);
cr_assert_eq(cpu->P & MOS_NEGATIVE, 0);
cr_assert_eq(cpu->P & MOS_ZERO, MOS_ZERO);
cpu->A = 192;
mos6502_handle_cmp(cpu, 3);
cr_assert_eq(cpu->P & MOS_CARRY, MOS_CARRY);
cr_assert_eq(cpu->P & MOS_NEGATIVE, MOS_NEGATIVE);
cr_assert_eq(cpu->P & MOS_ZERO, 0);
}
Test(mos6502_arith, cpx)
{
cpu->X = 5;
mos6502_handle_cpx(cpu, 3);
cr_assert_eq(cpu->P & MOS_CARRY, MOS_CARRY);
cr_assert_eq(cpu->P & MOS_NEGATIVE, 0);
cr_assert_eq(cpu->P & MOS_ZERO, 0);
}
Test(mos6502_arith, cpy)
{
cpu->Y = 5;
mos6502_handle_cpy(cpu, 3);
cr_assert_eq(cpu->P & MOS_CARRY, MOS_CARRY);
cr_assert_eq(cpu->P & MOS_NEGATIVE, 0);
cr_assert_eq(cpu->P & MOS_ZERO, 0);
}
Test(mos6502_arith, dec)
{
// Note that DEC does NOT decrement the accumulator if the last
// address is not set. It does _nothing_.
cpu->A = 5;
mos6502_handle_dec(cpu, 0);
cr_assert_neq(cpu->A, 4);
cpu->last_addr = 123;
vm_segment_set(cpu->memory, 123, 44);
// Note _also_ that DEC expects the number to be decremented will be
// passed in as the effective operand, although it doesn't
// necessarily need for that to be so.
mos6502_handle_dec(cpu, 44);
cr_assert_eq(vm_segment_get(cpu->memory, 123), 43);
}
Test(mos6502_arith, dex)
{
cpu->X = 5;
mos6502_handle_dex(cpu, 0);
cr_assert_eq(cpu->X, 4);
}
Test(mos6502_arith, dey)
{
cpu->Y = 5;
mos6502_handle_dey(cpu, 0);
cr_assert_eq(cpu->Y, 4);
}
Test(mos6502_arith, inc)
{
cpu->last_addr = 123;
mos6502_handle_inc(cpu, 55);
cr_assert_eq(vm_segment_get(cpu->memory, 123), 56);
}
Test(mos6502_arith, inx)
{
cpu->X = 5;
mos6502_handle_inx(cpu, 0);
cr_assert_eq(cpu->X, 6);
}
Test(mos6502_arith, iny)
{
cpu->Y = 5;
mos6502_handle_iny(cpu, 0);
cr_assert_eq(cpu->Y, 6);
}
Test(mos6502_arith, sbc)
{
cpu->A = 5;
mos6502_handle_sbc(cpu, 3);
cr_assert_eq(cpu->A, 2);
cpu->P |= MOS_CARRY;
cpu->A = 16;
mos6502_handle_sbc(cpu, 8);
cr_assert_eq(cpu->A, 7);
}