cranelift-codegen-meta 0.88.2

Metaprogram for cranelift-codegen code generator library
Documentation 
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use crate::cdsl::isa::TargetIsa;
use crate::cdsl::settings::{SettingGroup, SettingGroupBuilder};

use crate::shared::Definitions as SharedDefinitions;

fn define_settings(_shared: &SettingGroup) -> SettingGroup {
    let mut setting = SettingGroupBuilder::new("arm64");
    let has_lse = setting.add_bool(
        "has_lse",
        "Has Large System Extensions (FEAT_LSE) support.",
        "",
        false,
    );

    setting.add_bool(
        "has_pauth",
        "Has Pointer authentication (FEAT_PAuth) support; enables the use of \
         non-HINT instructions, but does not have an effect on code generation \
         by itself.",
        "",
        false,
    );
    setting.add_bool(
        "sign_return_address_all",
        "If function return address signing is enabled, then apply it to all \
        functions; does not have an effect on code generation by itself.",
        "",
        false,
    );
    setting.add_bool(
        "sign_return_address",
        "Use pointer authentication instructions to sign function return \
         addresses; HINT-space instructions using the A key are generated \
         and simple functions that do not use the stack are not affected \
         unless overridden by other settings.",
        "",
        false,
    );
    setting.add_bool(
        "sign_return_address_with_bkey",
        "Use the B key with pointer authentication instructions instead of \
        the default A key; does not have an effect on code generation by \
        itself. Some platform ABIs may require this, for example.",
        "",
        false,
    );

    setting.add_predicate("use_lse", predicate!(has_lse));
    setting.build()
}

pub(crate) fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
    let settings = define_settings(&shared_defs.settings);

    TargetIsa::new("arm64", settings)
}