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cc: add shr

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Paul Mathieu 2021-07-25 23:55:36 -07:00
parent edb4161724
commit 8dfa5addfd
1 changed files with 12 additions and 0 deletions
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12
tools/cc.py
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@ -469,6 +469,7 @@ MulOp = make_cpu_bin_op('mul')
AndOp = make_cpu_bin_op('and')
OrOp = make_cpu_bin_op('or')
XorOp = make_cpu_bin_op('xor')
ShrOp = make_cpu_bin_op('shr') # 2nd operand needs to be a literal
class ShlOp(BinOp):
scratch_need = 2
@ -1270,6 +1271,17 @@ class CcInterp(lark.visitors.Interpreter):
neq = _binary_op(NeqOp)
eq = _combo(bool_not, 'neq')
def shr(self, tree):
self.visit(tree.children[0])
left = tree.children[0].op.out
assert tree.children[1].data == 'literal'
right = tree.children[1].children[0]
dest = self.cur_fun.regs.take()
tree.op = ShrOp(self.cur_fun, [dest, left, right])
self._synth(tree.op)
self.cur_fun.regs.give(left)
tree.type = tree.children[0].type # because uhm reasons
def _assign(self, left, right):
self._log(f'assigning {left} = {right}')
self.cur_fun.regs.assign(left, right)