def visit(self, node: cil.SubstringNode):
self.add_inst(
mips.CommentNode(
f"<substr:>{node.dest}[{node.index}:{node.length}]"))
self.visit(cil.StaticCallNode('String__init', node.dest))
src_address = self.get_address('self')
dest_address = self.get_address(node.dest)
index_address = self.get_address(node.index)
length_address = self.get_address(node.length)
push_src = (mips.LWNode(a0,
(src_address, fp)), mips.LWNode(a0, (4, a0)))
push_length = (mips.LWNode(a2, (length_address, fp)),
mips.LWNode(a2, (4, a2)))
push_index = (mips.LWNode(a1, (index_address, fp)),
mips.LWNode(a1, (4, a1)))
self.add_inst(
*push_src,
*push_length,
*push_index,
mips.JALNode('substr'),
)
self.add_inst(
mips.LWNode(t1, (dest_address, fp)), mips.SWNode(v0, 4, t1),
mips.CommentNode(
f"</substr:>{node.dest}[{node.index}:{node.length}]"))
def visit(self, node: cil.ConformsNode):
left_offset = self.get_address(node.left)
# right_offset = self.get_address(node.right)
dest_offset = self.get_address(node.dest)
self.add_inst(
mips.CommentNode(
f"<conforms:{node.dest}<-{node.left}-{node.right}>"), )
self.add_inst(
mips.LWNode(
t0, (left_offset, fp)).with_comm("Load left pointer to self"),
mips.LWNode(
a0, (0, t0)).with_comm("Load left pointer to type of self"),
mips.LANode(a1, node.right), mips.JALNode('conforms'),
mips.MoveNode(s0, v0))
self.visit(cil.StaticCallNode('Bool__init', node.dest))
self.add_inst(
mips.LWNode(t0, (dest_offset, fp)),
mips.SWNode(s0, 4, t0),
mips.CommentNode(
f"</conforms:{node.dest}<-{node.left}-{node.right}>"),
)
def visit(self, node: cil.StaticCallNode):
dest = self.get_address(node.dest)
self.add_inst(
mips.CommentNode(f"<staticcall:{node.function}-{node.dest}>"),
mips.JALNode(node.function),
mips.SWNode(v0, dest, fp),
mips.CommentNode(f"</staticcall:{node.function}-{node.dest}>"),
)
def visit(self, node: cil.InitNode):
dest = self.get_address(node.dest)
self.add_inst(
mips.LWNode(a0, node.type_name),
mips.JALNode('malloc'),
mips.LANode(t0, node.type_name).with_comm(
f"Get pointer to type {node.type_name}"),
mips.SWNode(t0, 0, v0).with_comm(f"Set type pointer as attr"),
mips.SWNode(v0, dest, fp),
)
def visit(self, node: cil.ReadStringNode):
self.add_inst(mips.CommentNode(f"<readstring:{node.dest}>"))
address = self.get_address(node.dest)
self.add_inst(mips.LINode(a0, 512), mips.JALNode('malloc'),
mips.MoveNode(t2, v0))
self.add_inst(
mips.MoveNode(a0, t2),
mips.LINode(a1, 512),
mips.LINode(v0, 8),
mips.SysCallNode(),
)
self.visit(cil.StaticCallNode('String__init', node.dest))
self.add_inst(mips.LWNode(t0, (address, fp)), mips.SWNode(t2, 4, t0))
# Remove eol
self.add_inst(mips.MoveNode(a0, t2), mips.JALNode('remove_eol'))
self.add_inst(mips.CommentNode(f"</readstring:{node.dest}>"))
def visit(self, node: cil.ConcatNode):
self.add_inst(
mips.CommentNode(f"<concat:{node.dest}={node.str1}+{node.str2}>"))
self.visit(cil.StaticCallNode("String__init", node.dest))
str1_address = self.get_address(node.str1)
str2_address = self.get_address(node.str2)
dest_address = self.get_address(node.dest)
# Calc length of str1 and save it in t0
length_of_str1 = (mips.LWNode(a0, (str1_address, fp)),
mips.LWNode(a0, (4, a0)), mips.JALNode('length'),
mips.MoveNode(t0, v0))
# Calc length of str2 and save it in t1
length_of_str2 = (mips.LWNode(a0, (str2_address, fp)),
mips.LWNode(a0, (4, a0)), mips.JALNode('length'),
mips.MoveNode(t1, v0))
push_str1 = (mips.LWNode(a0,
(str1_address, fp)), mips.LWNode(a0, (4, a0)))
push_str2 = (mips.LWNode(a1,
(str2_address, fp)), mips.LWNode(a1, (4, a1)))
push_length = (mips.ADDNode(a2, t0, t1), )
self.add_inst(
*length_of_str1,
*length_of_str2,
*push_str1,
*push_str2,
*push_length,
mips.JALNode('concat'),
)
self.add_inst(mips.LWNode(t1, (dest_address, fp)),
mips.SWNode(v0, 4, t1))
self.add_inst(
mips.CommentNode(f"</concat:{node.dest}={node.str1}+{node.str2}>"))
def visit(self, node: cil.IsVoidNode):
src = self.get_address(node.src)
dest = self.get_address(node.dest)
self.add_inst(mips.CommentNode(f"<isvoid:{node.dest}-{node.src}>"), )
self.visit(cil.StaticCallNode('Bool__init', node.dest))
self.add_inst(
mips.LWNode(a0, (src, fp)).with_comm('Push instance pointer'),
mips.JALNode('isvoid'),
mips.LWNode(t0, (dest, fp)).with_comm('Load Bool pointer'),
mips.SWNode(v0, 4,
t0).with_comm('Save isvoid result as value of Bool'),
mips.CommentNode(f"</isvoid:{node.dest}-{node.src}>"),
)
def visit(self, node: cil.LengthNode):
self.add_inst(
mips.CommentNode(f"<length:{node.dest}=len({node.src})>"))
self.visit(cil.StaticCallNode("Int__init", node.dest))
src_address = self.get_address(node.src)
dest_address = self.get_address(node.dest)
self.add_inst(
mips.LWNode(a0, (src_address, fp)),
mips.LWNode(a0, (4, a0)),
mips.JALNode('length'),
mips.LWNode(t1, (dest_address, fp)),
mips.SWNode(v0, 4, t1),
)
self.add_inst(
mips.CommentNode(f"</length:{node.dest}=len({node.src})>"))
def visit(self, node: cil.EqualNode):
left = self.get_address(node.left)
right = self.get_address(node.right)
dest = self.get_address(node.dest)
self.add_inst(
mips.CommentNode(
f"<equal: {node.dest} <- {node.left} = {node.right}>"), )
self.visit(cil.StaticCallNode("Bool__init", node.dest))
self.add_inst(
mips.LWNode(a0, (left, fp)),
mips.LWNode(a1, (right, fp)),
mips.JALNode("equal"),
mips.LWNode(t0, (dest, fp)),
mips.SWNode(v0, 4, t0),
mips.CommentNode(
f"<equal: {node.dest} <- {node.left} = {node.right}>"),
)