2f7057b96f
This function will emit the binary machine code into contiguous raw memory while sending relocations to a RelocSink. Add a MemoryCodeSink for generating machine code directly into memory efficiently. Allow the TargetIsa to provide emit_function implementations that are specialized to the MemoryCodeSink type to avoid needless small virtual callbacks to put1() et etc.
99 lines
2.9 KiB
Rust
99 lines
2.9 KiB
Rust
//! ARM 64-bit Instruction Set Architecture.
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pub mod settings;
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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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use binemit::{CodeSink, MemoryCodeSink, emit_function};
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use super::super::settings as shared_settings;
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use isa::enc_tables::{lookup_enclist, Encodings};
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use isa::Builder as IsaBuilder;
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use isa::{TargetIsa, RegInfo, RegClass, EncInfo, Legalize};
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use ir;
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use regalloc;
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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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}
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/// Get an ISA builder for creating ARM64 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(shared_flags: shared_settings::Flags,
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builder: &shared_settings::Builder)
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-> Box<TargetIsa> {
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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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})
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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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"arm64"
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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, 'b>(&'a self,
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_dfg: &'b ir::DataFlowGraph,
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inst: &'b ir::InstructionData,
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ctrl_typevar: ir::Type)
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-> Result<Encodings<'a, 'b>, Legalize> {
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lookup_enclist(ctrl_typevar,
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inst.opcode(),
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&enc_tables::LEVEL1_A64[..],
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&enc_tables::LEVEL2[..])
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.and_then(|enclist_offset| {
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Ok(Encodings::new(enclist_offset,
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&enc_tables::ENCLISTS[..],
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inst,
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enc_tables::check_instp,
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self.isa_flags.predicate_bytes()))
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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::AllocatableSet {
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abi::allocatable_registers(func)
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}
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fn emit_inst(&self, func: &ir::Function, inst: ir::Inst, sink: &mut CodeSink) {
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binemit::emit_inst(func, inst, 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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fn reloc_names(&self) -> &'static [&'static str] {
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&binemit::RELOC_NAMES
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}
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}
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