Encodes an entry for a virtual register.
(vreg: VirtReg, stage: Stage, virt_regs: &VirtRegs)
| 51 | impl Entry { |
| 52 | /// Encodes an entry for a virtual register. |
| 53 | fn encode(vreg: VirtReg, stage: Stage, virt_regs: &VirtRegs) -> Self { |
| 54 | let stage = match stage { |
| 55 | Stage::Evict => 1, |
| 56 | Stage::Split => 0, |
| 57 | }; |
| 58 | let has_fixed_hint = virt_regs[vreg].has_fixed_hint as u64; |
| 59 | let group_size = 0; |
| 60 | let size = ValueSegment::live_insts(virt_regs.segments(vreg)) as u64; |
| 61 | let size = size.min((1 << 27) - 1); |
| 62 | let index = vreg.index() as u64; |
| 63 | Entry { |
| 64 | bits: (stage << 63) |
| 65 | | (has_fixed_hint << 62) |
| 66 | | (group_size << 59) |
| 67 | | (size << 32) |
| 68 | | index, |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /// Encodes an entry for a virtual register group. |
| 73 | fn encode_group(group: VirtRegGroup, stage: Stage, virt_regs: &VirtRegs) -> Self { |