b6bb6a196a
* Add support for binary/octal literals to ISLE In a number of x64-changes recently some u8 immediates are interpreted as four bit-packed 2-bit numbers and I have a tough time going between hex and these bit-packed numbers. I've been writing `0xAA == 0b...` in comments to indicate the intent but I figured it'd be a bit clearer if the binary literal was accepted directly! This is a minor update to the ISLE lexer to allow for binary `0b00...` and octal `0o00...` literals in the same manner as hex literals. Some comments in the x64 backend are then removed to use the binary literal syntax directly. * Update ISLE reference for octal/binary * Update ISLE tests for octal/binary
ISLE: Instruction Selection / Lowering Expressions
ISLE is a domain specific language (DSL) for instruction selection and lowering
clif instructions to vcode's MachInsts in Cranelift.
ISLE is a statically-typed term-rewriting language. You define rewriting rules
that map input terms (clif instructions) into output terms (MachInsts). These
rules get compiled down into Rust source test that uses a tree of match
expressions that is as good or better than what you would have written by hand.