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//! This crate generates Rust sources for use by
//! [`cranelift_codegen`](../cranelift_codegen/index.html).
#[macro_use]
mod cdsl;
mod srcgen;
pub mod error;
pub mod isa;
mod gen_binemit;
mod gen_encodings;
mod gen_inst;
mod gen_legalizer;
mod gen_registers;
mod gen_settings;
mod gen_types;
mod default_map;
mod shared;
mod unique_table;
/// Generate an ISA from an architecture string (e.g. "x86_64").
pub fn isa_from_arch(arch: &str) -> Result<isa::Isa, String> {
isa::Isa::from_arch(arch).ok_or_else(|| format!("no supported isa found for arch `{}`", arch))
}
/// Generates all the Rust source files used in Cranelift from the meta-language.
pub fn generate(
old_backend_isas: &[isa::Isa],
new_backend_isas: &[isa::Isa],
out_dir: &str,
) -> Result<(), error::Error> {
// Create all the definitions:
// - common definitions.
let mut shared_defs = shared::define();
gen_settings::generate(
&shared_defs.settings,
gen_settings::ParentGroup::None,
"settings.rs",
&out_dir,
)?;
gen_types::generate("types.rs", &out_dir)?;
// - per ISA definitions.
let target_isas = isa::define(old_backend_isas, &mut shared_defs);
// At this point, all definitions are done.
let all_formats = shared_defs.verify_instruction_formats();
// Generate all the code.
gen_inst::generate(
all_formats,
&shared_defs.all_instructions,
"opcodes.rs",
"inst_builder.rs",
&out_dir,
)?;
let extra_legalization_groups: &[&'static str] = if !new_backend_isas.is_empty() {
// The new backend only requires the "expand" legalization group.
&["expand"]
} else {
&[]
};
gen_legalizer::generate(
&target_isas,
&shared_defs.transform_groups,
extra_legalization_groups,
"legalize",
&out_dir,
)?;
for isa in target_isas {
gen_registers::generate(&isa, &format!("registers-{}.rs", isa.name), &out_dir)?;
gen_settings::generate(
&isa.settings,
gen_settings::ParentGroup::Shared,
&format!("settings-{}.rs", isa.name),
&out_dir,
)?;
gen_encodings::generate(
&shared_defs,
&isa,
&format!("encoding-{}.rs", isa.name),
&out_dir,
)?;
gen_binemit::generate(
&isa.name,
&isa.recipes,
&format!("binemit-{}.rs", isa.name),
&out_dir,
)?;
}
for isa in new_backend_isas {
match isa {
isa::Isa::X86 => {
// If the old backend ISAs contained x86, this file has already been generated.
if old_backend_isas.iter().any(|isa| *isa == isa::Isa::X86) {
continue;
}
let settings = crate::isa::x86::settings::define(&shared_defs.settings);
gen_settings::generate(
&settings,
gen_settings::ParentGroup::Shared,
"settings-x86.rs",
&out_dir,
)?;
}
isa::Isa::Arm64 => {
// aarch64 doesn't have platform-specific settings.
}
isa::Isa::Arm32 | isa::Isa::Riscv => todo!(),
}
}
Ok(())
}
|
