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.
42 lines
1.2 KiB
Rust
42 lines
1.2 KiB
Rust
//! Binary machine code emission.
|
|
//!
|
|
//! The `binemit` module contains code for translating Cretonne's intermediate representation into
|
|
//! binary machine code.
|
|
|
|
use ir::{FuncRef, JumpTable, Function, Inst};
|
|
|
|
/// Relocation kinds depend on the current ISA.
|
|
pub struct Reloc(u16);
|
|
|
|
/// Abstract interface for adding bytes to the code segment.
|
|
///
|
|
/// A `CodeSink` will receive all of the machine code for a function. It also accepts relocations
|
|
/// which are locations in the code section that need to be fixed up when linking.
|
|
pub trait CodeSink {
|
|
/// Add 1 byte to the code section.
|
|
fn put1(&mut self, u8);
|
|
|
|
/// Add 2 bytes to the code section.
|
|
fn put2(&mut self, u16);
|
|
|
|
/// Add 4 bytes to the code section.
|
|
fn put4(&mut self, u32);
|
|
|
|
/// Add 8 bytes to the code section.
|
|
fn put8(&mut self, u64);
|
|
|
|
/// Add a relocation referencing an external function at the current offset.
|
|
fn reloc_func(&mut self, Reloc, FuncRef);
|
|
|
|
/// Add a relocation referencing a jump table.
|
|
fn reloc_jt(&mut self, Reloc, JumpTable);
|
|
}
|
|
|
|
/// Report a bad encoding error.
|
|
#[inline(never)]
|
|
pub fn bad_encoding(func: &Function, inst: Inst) -> ! {
|
|
panic!("Bad encoding {} for {}",
|
|
func.encodings[inst],
|
|
func.dfg.display_inst(inst));
|
|
}
|