94a883abae
This makes it more clear what the relationship is between the Builder and the resulting Flags.
119 lines
2.9 KiB
Rust
119 lines
2.9 KiB
Rust
//! ARM 32-bit Instruction Set Architecture.
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mod abi;
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mod binemit;
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mod enc_tables;
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mod registers;
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pub mod settings;
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use super::super::settings as shared_settings;
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use binemit::{emit_function, CodeSink, MemoryCodeSink};
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use ir;
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use isa::Builder as IsaBuilder;
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use isa::enc_tables::{self as shared_enc_tables, lookup_enclist, Encodings};
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use isa::{EncInfo, RegClass, RegInfo, TargetIsa};
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use regalloc;
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use std::boxed::Box;
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use std::fmt;
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#[allow(dead_code)]
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struct Isa {
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shared_flags: shared_settings::Flags,
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isa_flags: settings::Flags,
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cpumode: &'static [shared_enc_tables::Level1Entry<u16>],
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}
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/// Get an ISA builder for creating ARM32 targets.
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pub fn isa_builder() -> IsaBuilder {
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IsaBuilder {
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setup: settings::builder(),
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constructor: isa_constructor,
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}
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}
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fn isa_constructor(
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shared_flags: shared_settings::Flags,
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builder: shared_settings::Builder,
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) -> Box<TargetIsa> {
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let level1 = if shared_flags.is_compressed() {
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&enc_tables::LEVEL1_T32[..]
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} else {
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&enc_tables::LEVEL1_A32[..]
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};
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Box::new(Isa {
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isa_flags: settings::Flags::new(&shared_flags, builder),
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shared_flags,
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cpumode: level1,
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})
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}
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impl TargetIsa for Isa {
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fn name(&self) -> &'static str {
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"arm32"
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}
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fn flags(&self) -> &shared_settings::Flags {
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&self.shared_flags
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}
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fn register_info(&self) -> RegInfo {
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registers::INFO.clone()
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}
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fn encoding_info(&self) -> EncInfo {
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enc_tables::INFO.clone()
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}
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fn legal_encodings<'a>(
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&'a self,
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func: &'a ir::Function,
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inst: &'a ir::InstructionData,
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ctrl_typevar: ir::Type,
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) -> Encodings<'a> {
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lookup_enclist(
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ctrl_typevar,
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inst,
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func,
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self.cpumode,
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&enc_tables::LEVEL2[..],
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&enc_tables::ENCLISTS[..],
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&enc_tables::LEGALIZE_ACTIONS[..],
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&enc_tables::RECIPE_PREDICATES[..],
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&enc_tables::INST_PREDICATES[..],
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self.isa_flags.predicate_view(),
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)
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}
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fn legalize_signature(&self, sig: &mut ir::Signature, current: bool) {
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abi::legalize_signature(sig, &self.shared_flags, current)
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}
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fn regclass_for_abi_type(&self, ty: ir::Type) -> RegClass {
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abi::regclass_for_abi_type(ty)
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}
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fn allocatable_registers(&self, func: &ir::Function) -> regalloc::RegisterSet {
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abi::allocatable_registers(func)
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}
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fn emit_inst(
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&self,
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func: &ir::Function,
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inst: ir::Inst,
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divert: &mut regalloc::RegDiversions,
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sink: &mut CodeSink,
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) {
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binemit::emit_inst(func, inst, divert, sink)
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}
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fn emit_function(&self, func: &ir::Function, sink: &mut MemoryCodeSink) {
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emit_function(func, binemit::emit_inst, sink)
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}
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}
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impl fmt::Display for Isa {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}\n{}", self.shared_flags, self.isa_flags)
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}
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}
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