Replace the isa::Legalize enumeration with a function pointer. This allows an ISA to define its own specific legalization actions instead of relying on the default two. Generate a LEGALIZE_ACTIONS table for each ISA which contains legalization function pointers indexed by the legalization codes that are already in the encoding tables. Include this table in isa/*/enc_tables.rs. Give the `Encodings` iterator a reference to the action table and change its `legalize()` method to return a function pointer instead of an ISA-specific code. The Result<> returned from TargetIsa::encode() no longer implements Debug, so eliminate uses of unwrap and expect on that type.
13 lines
317 B
Rust
13 lines
317 B
Rust
//! Encoding tables for Intel ISAs.
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use ir::{self, types, Opcode};
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use isa;
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use isa::constraints::*;
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use isa::enc_tables::*;
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use isa::encoding::RecipeSizing;
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use predicates;
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use super::registers::*;
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include!(concat!(env!("OUT_DIR"), "/encoding-intel.rs"));
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include!(concat!(env!("OUT_DIR"), "/legalize-intel.rs"));
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