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authorJana Rekittke <jana@rekittke.name>2009-07-04 11:25:04 +0200
committerBenedikt Böhm <bb@xnull.de>2009-07-04 11:25:04 +0200
commit320d92e542f62473f3bc84fdf32defb5b2741fdc (patch)
tree74c31d3d00ddd826a595d5da40cc9d7e20bade49 /src/back/generator.py
parentd4299c4b6f2f04f5eb8f36416f06c42e2586e7c0 (diff)
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simplify generator
Diffstat (limited to 'src/back/generator.py')
-rw-r--r--src/back/generator.py57
1 files changed, 12 insertions, 45 deletions
diff --git a/src/back/generator.py b/src/back/generator.py
index b743684..56a143c 100644
--- a/src/back/generator.py
+++ b/src/back/generator.py
@@ -63,57 +63,26 @@ class Generator(object):
# pass 1 - generate non-label ops
for tac in self.tac_list:
if isinstance(tac, TAC):
- if tac.op == Op.ADD:
- self.emit("ADD r%d, r%d, r%d" % (tac.arg1, tac.arg1, tac.arg2))
- elif tac.op == Op.SUB:
- self.emit("SUB r%d, r%d, r%d" % (tac.arg1, tac.arg1, tac.arg2))
- elif tac.op == Op.MUL:
- self.emit("MUL r%d, r%d, r%d" % (tac.arg1, tac.arg1, tac.arg2))
- elif tac.op == Op.DIV:
- self.emit("DIV r%d, r%d, r%d" % (tac.arg1, tac.arg1, tac.arg2))
- elif tac.op == Op.MOD:
- self.emit("MOD r%d, r%d, r%d" % (tac.arg1, tac.arg1, tac.arg2))
- elif tac.op == Op.AND:
- self.emit("AND r%d, r%d, r%d" % (tac.arg1, tac.arg1, tac.arg2))
- elif tac.op == Op.OR:
- self.emit("OR r%d, r%d, r%d" % (tac.arg1, tac.arg1, tac.arg2))
+ if tac.op in [Op.ADD, Op.SUB, Op.MUL, Op.DIV, Op.MOD, Op.AND, Op.OR]:
+ self.emit("%s r%d, r%d, r%d" % (tac.op, tac.arg1, tac.arg1, tac.arg2))
elif tac.op == Op.NOT:
- r = Register().new()
- self.emit("MOV r%d, 0" % r)
- self.emit("CMP r%d, r%d" % (tac.arg1, r))
- self.emit("EQ r%d" % (tac.arg1))
+ self.emit("CMP r%d, r0" % tac.arg1)
+ self.emit("EQ r%d" % tac.arg1)
elif tac.op == Op.MINUS:
self.emit("SUB r%d, r0, r%d" % (tac.arg1, tac.arg1))
- elif tac.op == Op.STORE:
- offset = Scope().get_variable_offset(tac.arg1)
- self.emit("SW bp, r%d, %d" % (tac.arg2, offset * 4))
- elif tac.op == Op.LOAD:
+ elif tac.op in [Op.STORE, Op.LOAD]:
offset = Scope().get_variable_offset(tac.arg1)
- self.emit("LW bp, r%d, %d" % (tac.arg2, offset * 4))
+ self.emit("%s bp, r%d, %d" % (tac.op, tac.arg2, offset * 4))
elif tac.op == Op.MOV:
self.emit("MOV r%d, %d" % (tac.arg1, tac.arg2))
elif tac.op == Op.CMP:
self.emit("CMP r%d, r%d" % (tac.arg1, tac.arg2))
- elif tac.op == Op.EQ:
- self.emit("EQ r%d" % tac.arg1)
- elif tac.op == Op.NE:
- self.emit("NE r%d" % tac.arg1)
- elif tac.op == Op.LT:
- self.emit("LT r%d" % tac.arg1)
- elif tac.op == Op.LE:
- self.emit("LE r%d" % tac.arg1)
- elif tac.op == Op.GE:
- self.emit("GE r%d" % tac.arg1)
- elif tac.op == Op.GT:
- self.emit("GT r%d" % tac.arg1)
- elif tac.op == Op.BEZ:
- self.emit(tac)
- elif tac.op == Op.JMP:
+ elif tac.op in [Op.EQ, Op.NE, Op.LT, Op.LE, Op.GE, Op.GT]:
+ self.emit("%s r%d" % (tac.op, tac.arg1))
+ elif tac.op in [Op.BEZ, Op.JMP]:
self.emit(tac)
- elif tac.op == Op.PUSH:
- self.emit("PUSH r%d" % tac.arg1)
- elif tac.op == Op.POP:
- self.emit("POP r%d" % tac.arg1)
+ elif tac.op in [Op.PUSH, Op.POP]:
+ self.emit("%s r%d" % (tac.op, tac.arg1))
elif tac.op == Op.CALL:
self.emit(tac)
self.emit("ADD r%d, r0, rv" % tac.arg2)
@@ -159,9 +128,7 @@ class Generator(object):
self.__op_list = map(replace_pseudo_regs, self.__op_list)
self.__op_list = [".REGS %d" % Register().count] + self.__op_list
- # print code
- #for i in range(len(self.__op_list)):
- # print "%04d: %s" % (i, str(self.__op_list[i]))
+ # finally, print the generated code
print "\n".join(self.__op_list)
def get_label_offset(self, name, tac):