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6c2ff1ef
2015 Sep 22
2
zero_reg
Hi all,
what is exactly "zero_reg"?
from ARMInstFromats.td:
*def pred : PredicateOperand<OtherVT, (ops i32imm, i32imm), (ops (i32 14),
(i32 zero_reg))> {...}*
I thought zero_reg can be replace by a random name like (alu_stat_reg for
alu state register) but when I compiled it, I figure out that zero_reg is a
predefined variable.
Can someone please give me more information about