ca2b1c79d7
Use the meta language encoding recipes to generate an emit_inst() function for each ISA. The generated calls into recipe_*() functions that must be implemented by hand. Implement recipe_*() functions for the RISC-V recipes. Add the TargetIsa::emit_inst() entry point which emits an instruction to a CodeSink trait object.
80 lines
2.3 KiB
Rust
80 lines
2.3 KiB
Rust
//! ARM 64-bit Instruction Set Architecture.
|
|
|
|
pub mod settings;
|
|
mod binemit;
|
|
mod enc_tables;
|
|
mod registers;
|
|
|
|
use binemit::CodeSink;
|
|
use super::super::settings as shared_settings;
|
|
use isa::enc_tables::{lookup_enclist, general_encoding};
|
|
use isa::Builder as IsaBuilder;
|
|
use isa::{TargetIsa, RegInfo, Encoding, Legalize, RecipeConstraints};
|
|
use ir;
|
|
|
|
#[allow(dead_code)]
|
|
struct Isa {
|
|
shared_flags: shared_settings::Flags,
|
|
isa_flags: settings::Flags,
|
|
}
|
|
|
|
/// Get an ISA builder for creating ARM64 targets.
|
|
pub fn isa_builder() -> IsaBuilder {
|
|
IsaBuilder {
|
|
setup: settings::builder(),
|
|
constructor: isa_constructor,
|
|
}
|
|
}
|
|
|
|
fn isa_constructor(shared_flags: shared_settings::Flags,
|
|
builder: &shared_settings::Builder)
|
|
-> Box<TargetIsa> {
|
|
Box::new(Isa {
|
|
isa_flags: settings::Flags::new(&shared_flags, builder),
|
|
shared_flags: shared_flags,
|
|
})
|
|
}
|
|
|
|
impl TargetIsa for Isa {
|
|
fn name(&self) -> &'static str {
|
|
"arm64"
|
|
}
|
|
|
|
fn flags(&self) -> &shared_settings::Flags {
|
|
&self.shared_flags
|
|
}
|
|
|
|
fn register_info(&self) -> RegInfo {
|
|
registers::INFO.clone()
|
|
}
|
|
|
|
fn encode(&self,
|
|
dfg: &ir::DataFlowGraph,
|
|
inst: &ir::InstructionData)
|
|
-> Result<Encoding, Legalize> {
|
|
lookup_enclist(inst.ctrl_typevar(dfg),
|
|
inst.opcode(),
|
|
&enc_tables::LEVEL1_A64[..],
|
|
&enc_tables::LEVEL2[..])
|
|
.and_then(|enclist_offset| {
|
|
general_encoding(enclist_offset,
|
|
&enc_tables::ENCLISTS[..],
|
|
|instp| enc_tables::check_instp(inst, instp),
|
|
|isap| self.isa_flags.numbered_predicate(isap as usize))
|
|
.ok_or(Legalize::Expand)
|
|
})
|
|
}
|
|
|
|
fn recipe_names(&self) -> &'static [&'static str] {
|
|
&enc_tables::RECIPE_NAMES[..]
|
|
}
|
|
|
|
fn recipe_constraints(&self) -> &'static [RecipeConstraints] {
|
|
&enc_tables::RECIPE_CONSTRAINTS
|
|
}
|
|
|
|
fn emit_inst(&self, func: &ir::Function, inst: ir::Inst, sink: &mut CodeSink) {
|
|
binemit::emit_inst(func, inst, sink)
|
|
}
|
|
}
|