def execute_strh(s, inst):
if condition_passed(s, inst.cond()):
addr = addressing_mode_3(s, inst)
# TODO: support multiple memory accessing modes?
# MemoryAccess( s.B, s.E )
# TODO: alignment fault checking?
# if (CP15_reg1_Ubit == 0) and address[0] == 0b1:
# UNPREDICTABLE
s.mem.write(addr, 2, s.rf[inst.rd()] & 0xFFFF)
s.rf[PC] = s.fetch_pc() + 4
def execute_strh( s, inst ):
if condition_passed( s, inst.cond ):
addr = addressing_mode_3( s, inst )
# TODO: support multiple memory accessing modes?
# MemoryAccess( s.B, s.E )
# TODO: alignment fault checking?
# if (CP15_reg1_Ubit == 0) and address[0] == 0b1:
# UNPREDICTABLE
s.mem.write( addr, 2, s.rf[ inst.rd ] & 0xFFFF )
s.rf[PC] = s.fetch_pc() + 4
def execute_ldrsh(s, inst):
if condition_passed(s, inst.cond()):
if inst.rd() == 15: raise FatalError('UNPREDICTABLE')
addr = addressing_mode_3(s, inst)
# TODO: support multiple memory accessing modes?
# MemoryAccess( s.B, s.E )
# TODO: alignment fault checking?
# if (CP15_reg1_Ubit == 0) and address[0] == 0b1:
# UNPREDICTABLE
s.rf[inst.rd()] = sign_extend_half(s.mem.read(addr, 2))
s.rf[PC] = s.fetch_pc() + 4
def execute_ldrsh( s, inst ):
if condition_passed( s, inst.cond ):
if inst.rd == 15: raise FatalError('UNPREDICTABLE')
addr = addressing_mode_3( s, inst )
# TODO: support multiple memory accessing modes?
# MemoryAccess( s.B, s.E )
# TODO: alignment fault checking?
# if (CP15_reg1_Ubit == 0) and address[0] == 0b1:
# UNPREDICTABLE
s.rf[ inst.rd ] = sext_16( s.mem.read( addr, 2 ) )
s.rf[PC] = s.fetch_pc() + 4
