| Summary: | ARM64 assembler should use optionally-shifted immediate values | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | JF Bastien <jfbastien> |
| Component: | JavaScriptCore | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW --- | ||
| Severity: | Normal | CC: | fpizlo, jfbastien, keith_miller, mark.lam, msaboff, rmorisset, saam |
| Priority: | P2 | ||
| Version: | WebKit Nightly Build | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
Right now it knows about uint12 immediate values (and their negative equivalents) but doesn't know about the optional shift: case shift of when '00' imm = ZeroExtend(imm12, datasize); when '01' imm = ZeroExtend(imm12:Zeros(12), datasize); // <--- THIS when '1x' ReservedValue(); This exists in add and sub at a minimum. Look at all opcodes which have this optional shift, and teach the ARM64 assembler to use them!