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reg32
2013 Feb 25
0
[LLVMdev] localstatckallocation pass
...ways.
Some fancy schemes for addressing can cause too much register pressure
to make it worth it.
if I want to maintain an additional pointer I can for example, using a
pair of unused Mips32 registers, keep the value in a mips32 register and
bring it back to live quickl.
Value is in Reg32X.
Reg32Y = Reg16Z
Reg16Z = Reg32X
... do some things with Reg16Z/Reg32X
Reg16z = Reg32Y ; restore Reg16Z
These move instructions are both 16 bit instructions.
At some point I have think of some more formal ways to use the Mips32
registers.