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Added unit tests for LSR.

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Mike Naberezny 2008-07-19 18:07:22 +00:00
parent c307b4858d
commit ec6186576f
2 changed files with 195 additions and 1 deletions
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1
TODO.txt
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@ -6,5 +6,4 @@ Instructions needing unit tests:
dec
eor
inc
lsr
sbc

195
mpu_test.py
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@ -1835,6 +1835,201 @@ class MPUTests(unittest.TestCase):
self.assertEquals(cpu.ZERO, cpu.flags & cpu.ZERO)
self.assertEquals(0, cpu.flags & cpu.NEGATIVE)
# LSR Accumulator
def test_lsr_accumulator_rotates_in_zero_not_carry(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000] = (0x4A) #=> LSR A
mpu.a = 0x00
mpu.step()
self.assertEquals(0x0001, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_accumulator_sets_carry_and_zero_flags_after_rotation(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000] = (0x4A) #=> LSR A
mpu.a = 0x01
mpu.step()
self.assertEquals(0x0001, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.CARRY, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_accumulator_rotates_bits_right(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000] = (0x4A) #=> LSR A
mpu.a = 0x04
mpu.step()
self.assertEquals(0x0001, mpu.pc)
self.assertEquals(0x02, mpu.a)
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
# LSR Absolute
def test_lsr_absolute_rotates_in_zero_not_carry(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000:0x0002] = (0x4E, 0xCD, 0xAB) #=> LSR $ABCD
mpu.memory[0xABCD] = 0x00
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.memory[0xABCD])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_absolute_sets_carry_and_zero_flags_after_rotation(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000:0x0002] = (0x4E, 0xCD, 0xAB) #=> LSR $ABCD
mpu.memory[0xABCD] = 0x01
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.memory[0xABCD])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.CARRY, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_absolute_rotates_bits_right(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000:0x0002] = (0x4E, 0xCD, 0xAB) #=> LSR $ABCD
mpu.memory[0xABCD] = 0x04
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x02, mpu.memory[0xABCD])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
# LSR Zero Page
def test_lsr_zp_rotates_in_zero_not_carry(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000:0x0001] = (0x46, 0x10) #=> LSR $0010
mpu.memory[0x0010] = 0x00
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.memory[0x0010])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_zp_sets_carry_and_zero_flags_after_rotation(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000:0x0001] = (0x46, 0x10) #=> LSR $0010
mpu.memory[0x0010] = 0x01
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.memory[0x0010])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.CARRY, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_zp_rotates_bits_right(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000:0x0001] = (0x46, 0x10) #=> LSR $0010
mpu.memory[0x0010] = 0x04
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x02, mpu.memory[0x0010])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
# LSR Absolute, X-Indexed
def test_lsr_absolute_x_indexed_rotates_in_zero_not_carry(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.x = 0x03
mpu.memory[0x0000:0x0002] = (0x5E, 0xCD, 0xAB) #=> LSR $ABCD,X
mpu.memory[0xABCD + mpu.x] = 0x00
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.memory[0xABCD + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_absolute_x_indexed_sets_carry_and_zero_flags_after_rotation(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.x = 0x03
mpu.memory[0x0000:0x0002] = (0x5E, 0xCD, 0xAB) #=> LSR $ABCD,X
mpu.memory[0xABCD + mpu.x] = 0x01
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.memory[0xABCD + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.CARRY, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_absolute_x_indexed_rotates_bits_right(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.memory[0x0000:0x0002] = (0x5E, 0xCD, 0xAB) #=> LSR $ABCD,X
mpu.memory[0xABCD + mpu.x] = 0x04
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x02, mpu.memory[0xABCD + mpu.x])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
# LSR Zero Page, X-Indexed
def test_lsr_zp_x_indexed_rotates_in_zero_not_carry(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.x = 0x03
mpu.memory[0x0000:0x0001] = (0x56, 0x10) #=> LSR $0010,X
mpu.memory[0x0010 + mpu.x] = 0x00
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.memory[0x0010 + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_zp_x_indexed_sets_carry_and_zero_flags_after_rotation(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.x = 0x03
mpu.memory[0x0000:0x0001] = (0x56, 0x10) #=> LSR $0010,X
mpu.memory[0x0010 + mpu.x] = 0x01
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.memory[0x0010 + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.CARRY, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_lsr_zp_x_indexed_rotates_bits_right(self):
mpu = MPU()
mpu.flags &= mpu.CARRY
mpu.x = 0x03
mpu.memory[0x0000:0x0001] = (0x56, 0x10) #=> LSR $0010,X
mpu.memory[0x0010 + mpu.x] = 0x04
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x02, mpu.memory[0x0010 + mpu.x])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.CARRY)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
# NOP
def test_nop_does_nothing(self):