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erc-c/tests/mos6502.branch.c
Peter Evans 7f6b8d3587 We can no longer assume PC increments during address handling
This change required a number of consequent changes to assumptions we'd
made, and I'm not 100% confident we have things right at this point in
time.
2018-01-09 20:59:14 -06:00

104 lines
2.0 KiB
C

#include <criterion/criterion.h>
#include "mos6502.h"
#include "mos6502.enums.h"
#include "mos6502.tests.h"
TestSuite(mos6502_branch, .init = setup, .fini = teardown);
Test(mos6502_branch, bcc)
{
cpu->last_addr = 123;
mos6502_handle_bcc(cpu, 0);
cr_assert_eq(cpu->PC, 123);
cpu->P |= MOS_CARRY;
cpu->last_addr = 125;
mos6502_handle_bcc(cpu, 0);
cr_assert_neq(cpu->PC, 127);
}
Test(mos6502_branch, bcs)
{
cpu->last_addr = 123;
mos6502_handle_bcs(cpu, 0);
cr_assert_neq(cpu->PC, 123);
cpu->P |= MOS_CARRY;
cpu->last_addr = 125;
mos6502_handle_bcs(cpu, 0);
cr_assert_eq(cpu->PC, 125);
}
Test(mos6502_branch, beq)
{
cpu->last_addr = 123;
mos6502_handle_beq(cpu, 0);
cr_assert_neq(cpu->PC, 123);
cpu->P |= MOS_ZERO;
cpu->last_addr = 125;
mos6502_handle_beq(cpu, 0);
cr_assert_eq(cpu->PC, 125);
}
Test(mos6502_branch, bmi)
{
cpu->last_addr = 123;
mos6502_handle_bmi(cpu, 0);
cr_assert_neq(cpu->PC, 123);
cpu->P |= MOS_NEGATIVE;
cpu->last_addr = 125;
mos6502_handle_bmi(cpu, 0);
cr_assert_eq(cpu->PC, 125);
}
Test(mos6502_branch, bne)
{
cpu->last_addr = 123;
mos6502_handle_bne(cpu, 0);
cr_assert_eq(cpu->PC, 123);
cpu->P |= MOS_ZERO;
cpu->last_addr = 125;
mos6502_handle_bne(cpu, 0);
cr_assert_neq(cpu->PC, 127);
}
Test(mos6502_branch, bpl)
{
cpu->last_addr = 123;
mos6502_handle_bpl(cpu, 0);
cr_assert_eq(cpu->PC, 123);
cpu->P |= MOS_NEGATIVE;
cpu->last_addr = 125;
mos6502_handle_bpl(cpu, 0);
cr_assert_neq(cpu->PC, 127);
}
Test(mos6502_branch, bvc)
{
cpu->last_addr = 123;
mos6502_handle_bvc(cpu, 0);
cr_assert_eq(cpu->PC, 123);
cpu->P |= MOS_OVERFLOW;
cpu->last_addr = 125;
mos6502_handle_bvc(cpu, 0);
cr_assert_neq(cpu->PC, 127);
}
Test(mos6502_branch, bvs)
{
cpu->last_addr = 123;
mos6502_handle_bvs(cpu, 0);
cr_assert_neq(cpu->PC, 123);
cpu->P |= MOS_OVERFLOW;
cpu->last_addr = 125;
mos6502_handle_bvs(cpu, 0);
cr_assert_eq(cpu->PC, 125);
}