T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

38
cranelift/codegen/meta/src/isa/x86/mod.rs
View File

@@ -1,8 +1,8 @@
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::{PredicateNode, SettingGroup, SettingGroupBuilder};
pub fn define_settings(_shared: &SettingGroup) -> SettingGroup {
fn define_settings(_shared: &SettingGroup) -> SettingGroup {
let mut settings = SettingGroupBuilder::new("x86");
// CPUID.01H:ECX
@@ -68,49 +68,49 @@ pub fn define_settings(_shared: &SettingGroup) -> SettingGroup {
settings.finish()
}
fn define_registers(isa: &mut TargetIsaBuilder) {
fn define_registers() -> IsaRegs {
let mut regs = IsaRegsBuilder::new();
let builder = RegBankBuilder::new("IntRegs", "r")
.units(16)
.names(vec!["rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi"])
.track_pressure(true);
let int_regs = isa.add_reg_bank(builder);
let int_regs = regs.add_bank(builder);
let builder = RegBankBuilder::new("FloatRegs", "xmm")
.units(16)
.track_pressure(true);
let float_regs = isa.add_reg_bank(builder);
let float_regs = regs.add_bank(builder);
let builder = RegBankBuilder::new("FlagRegs", "")
.units(1)
.names(vec!["rflags"])
.track_pressure(false);
let flag_reg = isa.add_reg_bank(builder);
let flag_reg = regs.add_bank(builder);
let builder = RegClassBuilder::new_toplevel("GPR", int_regs);
let gpr = isa.add_reg_class(builder);
let gpr = regs.add_class(builder);
let builder = RegClassBuilder::new_toplevel("FPR", float_regs);
let fpr = isa.add_reg_class(builder);
let fpr = regs.add_class(builder);
let builder = RegClassBuilder::new_toplevel("FLAG", flag_reg);
isa.add_reg_class(builder);
regs.add_class(builder);
let builder = RegClassBuilder::subclass_of("GPR8", gpr, 0, 8);
let gpr8 = isa.add_reg_class(builder);
let gpr8 = regs.add_class(builder);
let builder = RegClassBuilder::subclass_of("ABCD", gpr8, 0, 4);
isa.add_reg_class(builder);
regs.add_class(builder);
let builder = RegClassBuilder::subclass_of("FPR8", fpr, 0, 8);
isa.add_reg_class(builder);
regs.add_class(builder);
regs.finish()
}
pub fn define(shared_settings: &SettingGroup) -> TargetIsa {
let settings = define_settings(shared_settings);
let mut isa = TargetIsaBuilder::new("x86", settings);
define_registers(&mut isa);
isa.finish()
let regs = define_registers();
TargetIsa::new("x86", settings, regs)
}