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compiler/ir_values: implement sign extension and truncation

This commit is contained in:
Sebastien Bourdeauducq 2014-08-18 22:51:54 +08:00
parent 4ff61a8f56
commit 219aa23d25
1 changed files with 11 additions and 12 deletions
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23
artiq/compiler/ir_values.py
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@ -57,24 +57,23 @@ class VInt:
zero = lc.Constant.int(lc.Type.int(self.nbits), 0)
return VBool(llvm_value=builder.icmp(lc.ICMP_NE, self.llvm_value, zero))
def o_int(self, builder):
def _o_intx(self, target_bits, builder):
if builder is None:
return VInt()
return VInt(target_bits)
else:
if self.nbits == 32:
if self.nbits == target_bits:
return self
else:
raise NotImplementedError
if self.nbits > target_bits:
return VInt(target_bits, llvm_value=builder.trunc(self.llvm_value, lc.Type.int(target_bits)))
if self.nbits < target_bits:
return VInt(target_bits, llvm_value=builder.sext(self.llvm_value, lc.Type.int(target_bits)))
def o_int(self, builder):
return self._o_intx(32, builder)
o_round = o_int
def o_int64(self, builder):
if builder is None:
return VInt(64)
else:
if self.nbits == 64:
return self
else:
raise NotImplementedError
return self._o_intx(64, builder)
o_round64 = o_int64
def _make_vint_binop_method(builder_name):