115c115,126
< numPhysCCRegs = Param.Unsigned(0, "Number of physical cc registers")
---
> # most ISAs don't use condition-code regs, so default is 0
> _defaultNumPhysCCRegs = 0
> if buildEnv['TARGET_ISA'] == 'x86':
> # For x86, each CC reg is used to hold only a subset of the
> # flags, so we need 4-5 times the number of CC regs as
> # physical integer regs to be sure we don't run out. In
> # typical real machines, CC regs are not explicitly renamed
> # (it's a side effect of int reg renaming), so they should
> # never be the bottleneck here.
> _defaultNumPhysCCRegs = Self.numPhysIntRegs * 5
> numPhysCCRegs = Param.Unsigned(_defaultNumPhysCCRegs,
> "Number of physical cc registers")