def evalToRegInstr(self, p, reg):
try:
isInitialized = self.identifier.declaration.initialized
if isInitialized == False:
raise Exception("Variable '%s' is not initialized" % self.identifier.pidentifier)
if isinstance(self.identifier, ArrayAccess):
return Instructions.LOAD_ARRAY_VALUE_TO_REGISTER(p, self.identifier, reg)
return Instructions.LOAD_IDENTIFIER_VALUE_TO_REGISTER(p, self.identifier, reg)
except Exception as err:
raise Exception(str(err) + " at line %i" % self.lineNumber)
def memAddressToReg(self, p, reg1, reg2):
declaration = self.declaration
if not declaration.isArray():
raise Exception("'%s' is not an Array" % declaration.pidentifier)
memoryId = declaration.memoryId
arrRangeFrom = declaration.rangeFrom
arrRangeTo = declaration.rangeTo
indexIdentifier = Identifier(self.index)
# tab(5:15) [memoryId:memoryId+10]
# a := 7
# tab(a)
Instructions.LOAD_IDENTIFIER_VALUE_TO_REGISTER(p, indexIdentifier, reg2) # reg2 = a.value
Instructions.setRegisterConst(p, reg1, arrRangeFrom) # reg1 = arrRangeFrom
Instructions.SUB(p, reg2, reg1) # reg2 = reg2 - reg1 // offset
Instructions.setRegisterConst(p, reg1, memoryId) # reg1 = memoryId
Instructions.ADD(p, reg1, reg2) # reg1 = reg1 + reg2 // memid + offset
