Documentation

SPARC instruction set. Not complete. This is only the ones we need.

Register or immediate

Check if a RI represents a zero value. - a literal zero - register %g0, which is always zero.

Calculate the effective address which would be used by the corresponding fpRel sequence.

Code to shift the stack pointer by n words.

An instruction that will cause the one after it never to be exectuted

The maximum number of spill slots available on the C stack. If we use up all of the slots, then we're screwed.

Why do we reserve 64 bytes, instead of using the whole thing?? -- BL 20090215

Apply a given mapping to tall the register references in this instruction.

Make a reg-reg move instruction. On SPARC v8 there are no instructions to move directly between floating point and integer regs. If we need to do that then we have to go via memory.

Make a spill reload instruction.

Make a spill instruction. On SPARC we spill below frame pointer leaving 2 words/spill

Make an unconditional branch instruction.

See if this instruction is telling us the current C stack delta

Check whether an instruction represents a reg-reg move. The register allocator attempts to eliminate reg->reg moves whenever it can, by assigning the src and dest temporaries to the same real register.

regUsage returns the sets of src and destination registers used by a particular instruction. Machine registers that are pre-allocated to stgRegs are filtered out, because they are uninteresting from a register allocation standpoint. (We wouldn't want them to end up on the free list!) As far as we are concerned, the fixed registers simply don't exist (for allocation purposes, anyway).