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mcregister
2013 Jun 05
1
[LLVMdev] TableGen lookup table recipe?
Is it possible to define lookup tables as a list in tablegen, to map one
value to another? Here's the template I was working on:
=========================================
class LookupTable {
list<int> mapping = [0, 8, 16, 24, 32];
}
def LUT : LookupTable;
class MyRegister<name, index> : Register<name> {
let HWEncoding = LUT.mapping[index];
int otherVal = index; // required as well, ie. 'unmapped'
}
foreach reg 0-32 in {
def R#reg : MyRegister<!subst("X", reg, "rX"), reg>;
}
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