abf157bd69
Before this patch, running the x64 new backend would require both
compiling with --features experimental_x64 and running with
`use_new_backend`.
This patches changes this behavior so that the runtime flag is not
needed anymore: using the feature flag will enforce usage of the new
backend everywhere, making using and testing it much simpler:
cargo run --features experimental_x64 ;; other CLI options/flags
This also gives a hint at what the meta language generation would look
like after switching to the new backend.
Compiling only with the x64 codegen flag gives a nice compile time speedup.
125 lines
3.3 KiB
Rust
125 lines
3.3 KiB
Rust
//! This crate generates Rust sources for use by
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//! [`cranelift_codegen`](../cranelift_codegen/index.html).
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#[macro_use]
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mod cdsl;
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mod srcgen;
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pub mod error;
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pub mod isa;
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mod gen_binemit;
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mod gen_encodings;
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mod gen_inst;
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mod gen_legalizer;
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mod gen_registers;
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mod gen_settings;
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mod gen_types;
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mod default_map;
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mod shared;
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mod unique_table;
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/// Generate an ISA from an architecture string (e.g. "x86_64").
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pub fn isa_from_arch(arch: &str) -> Result<isa::Isa, String> {
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isa::Isa::from_arch(arch).ok_or_else(|| format!("no supported isa found for arch `{}`", arch))
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}
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/// Generates all the Rust source files used in Cranelift from the meta-language.
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pub fn generate(
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old_backend_isas: &[isa::Isa],
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new_backend_isas: &[isa::Isa],
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out_dir: &str,
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) -> Result<(), error::Error> {
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// Create all the definitions:
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// - common definitions.
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let mut shared_defs = shared::define();
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gen_settings::generate(
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&shared_defs.settings,
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gen_settings::ParentGroup::None,
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"settings.rs",
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&out_dir,
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)?;
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gen_types::generate("types.rs", &out_dir)?;
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// - per ISA definitions.
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let target_isas = isa::define(old_backend_isas, &mut shared_defs);
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// At this point, all definitions are done.
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let all_formats = shared_defs.verify_instruction_formats();
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// Generate all the code.
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gen_inst::generate(
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all_formats,
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&shared_defs.all_instructions,
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"opcodes.rs",
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"inst_builder.rs",
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&out_dir,
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)?;
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let extra_legalization_groups: &[&'static str] = if !new_backend_isas.is_empty() {
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// The new backend only requires the "expand" legalization group.
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&["expand"]
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} else {
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&[]
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};
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gen_legalizer::generate(
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&target_isas,
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&shared_defs.transform_groups,
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extra_legalization_groups,
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"legalize",
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&out_dir,
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)?;
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for isa in target_isas {
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gen_registers::generate(&isa, &format!("registers-{}.rs", isa.name), &out_dir)?;
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gen_settings::generate(
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&isa.settings,
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gen_settings::ParentGroup::Shared,
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&format!("settings-{}.rs", isa.name),
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&out_dir,
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)?;
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gen_encodings::generate(
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&shared_defs,
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&isa,
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&format!("encoding-{}.rs", isa.name),
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&out_dir,
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)?;
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gen_binemit::generate(
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&isa.name,
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&isa.recipes,
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&format!("binemit-{}.rs", isa.name),
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&out_dir,
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)?;
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}
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for isa in new_backend_isas {
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match isa {
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isa::Isa::X86 => {
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// If the old backend ISAs contained x86, this file has already been generated.
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if old_backend_isas.iter().any(|isa| *isa == isa::Isa::X86) {
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continue;
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}
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let settings = crate::isa::x86::settings::define(&shared_defs.settings);
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gen_settings::generate(
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&settings,
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gen_settings::ParentGroup::Shared,
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"settings-x86.rs",
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&out_dir,
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)?;
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}
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isa::Isa::Arm64 => {
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// aarch64 doesn't have platform-specific settings.
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}
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isa::Isa::Arm32 | isa::Isa::Riscv => todo!(),
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}
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}
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Ok(())
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}
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