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[meta] Build registers with their own builder and immutably construct the TargetIsa;

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This commit is contained in:
Benjamin Bouvier
2019-02-11 12:34:44 +01:00
committed by Dan Gohman
parent f78a61b998
commit 049f067168
7 changed files with 256 additions and 237 deletions
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32
cranelift/codegen/meta/src/isa/arm32/mod.rs
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@@ -1,5 +1,5 @@
use crate::cdsl::isa::{TargetIsa, TargetIsaBuilder};
use crate::cdsl::regs::{RegBankBuilder, RegClassBuilder};
use crate::cdsl::isa::TargetIsa;
use crate::cdsl::regs::{IsaRegs, IsaRegsBuilder, RegBankBuilder, RegClassBuilder};
use crate::cdsl::settings::{SettingGroup, SettingGroupBuilder};
fn define_settings(_shared: &SettingGroup) -> SettingGroup {
@@ -7,39 +7,45 @@ fn define_settings(_shared: &SettingGroup) -> SettingGroup {
setting.finish()
}
pub fn define(shared_settings: &SettingGroup) -> TargetIsa {
let mut isa = TargetIsaBuilder::new("arm32", define_settings(shared_settings));
fn define_regs() -> IsaRegs {
let mut regs = IsaRegsBuilder::new();
let builder = RegBankBuilder::new("FloatRegs", "s")
.units(64)
.track_pressure(true);
let float_regs = isa.add_reg_bank(builder);
let float_regs = regs.add_bank(builder);
let builder = RegBankBuilder::new("IntRegs", "r")
.units(16)
.track_pressure(true);
let int_regs = isa.add_reg_bank(builder);
let int_regs = regs.add_bank(builder);
let builder = RegBankBuilder::new("FlagRegs", "")
.units(1)
.names(vec!["nzcv"])
.track_pressure(false);
let flag_reg = isa.add_reg_bank(builder);
let flag_reg = regs.add_bank(builder);
let builder = RegClassBuilder::new_toplevel("S", float_regs).count(32);
isa.add_reg_class(builder);
regs.add_class(builder);
let builder = RegClassBuilder::new_toplevel("D", float_regs).width(2);
isa.add_reg_class(builder);
regs.add_class(builder);
let builder = RegClassBuilder::new_toplevel("Q", float_regs).width(4);
isa.add_reg_class(builder);
regs.add_class(builder);
let builder = RegClassBuilder::new_toplevel("GPR", int_regs);
isa.add_reg_class(builder);
regs.add_class(builder);
let builder = RegClassBuilder::new_toplevel("FLAG", flag_reg);
isa.add_reg_class(builder);
regs.add_class(builder);
isa.finish()
regs.finish()
}
pub fn define(shared_settings: &SettingGroup) -> TargetIsa {
let settings = define_settings(shared_settings);
let regs = define_regs();
TargetIsa::new("arm32", settings, regs)
}