wasmer_compiler_singlepass/
location.rs

1use crate::common_decl::RegisterIndex;
2use crate::machine::*;
3use std::fmt::Debug;
4use std::hash::Hash;
5use std::slice::Iter;
6
7#[allow(dead_code)]
8#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
9pub enum Multiplier {
10    Zero = 0,
11    One = 1,
12    Two = 2,
13    Four = 4,
14    Height = 8,
15}
16
17#[allow(dead_code, clippy::upper_case_acronyms)]
18#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
19pub enum Location<R, S> {
20    GPR(R),
21    SIMD(S),
22    Memory(R, i32),
23    Memory2(R, R, Multiplier, i32), // R + R*Multiplier + i32
24    Imm8(u8),
25    Imm32(u32),
26    Imm64(u64),
27    None,
28}
29
30impl<R, S> MaybeImmediate for Location<R, S> {
31    fn imm_value(&self) -> Option<Value> {
32        match *self {
33            Location::Imm8(imm) => Some(Value::I8(imm as i8)),
34            Location::Imm32(imm) => Some(Value::I32(imm as i32)),
35            Location::Imm64(imm) => Some(Value::I64(imm as i64)),
36            _ => None,
37        }
38    }
39}
40
41#[allow(unused)]
42pub trait Reg: Copy + Clone + Eq + PartialEq + Debug + Hash + Ord {
43    fn is_callee_save(self) -> bool;
44    fn is_reserved(self) -> bool;
45    fn into_index(self) -> usize;
46    fn from_index(i: usize) -> Result<Self, ()>;
47    fn iterator() -> Iter<'static, Self>;
48
49    #[cfg(feature = "unwind")]
50    fn to_dwarf(self) -> gimli::Register;
51}
52
53#[allow(unused)]
54pub trait Descriptor<R: Reg, S: Reg> {
55    const FP: R;
56    const VMCTX: R;
57    const GPR_COUNT: usize;
58    const SIMD_COUNT: usize;
59    const WORD_SIZE: usize;
60    const STACK_GROWS_DOWN: bool;
61    const FP_STACK_ARG_OFFSET: i32;
62    const ARG_REG_COUNT: usize;
63    fn callee_save_gprs() -> Vec<R>;
64    fn caller_save_gprs() -> Vec<R>;
65    fn callee_save_simd() -> Vec<S>;
66    fn caller_save_simd() -> Vec<S>;
67    fn callee_param_location(n: usize) -> Location<R, S>;
68    fn caller_arg_location(n: usize) -> Location<R, S>;
69    fn return_location() -> Location<R, S>;
70}
71
72#[allow(unused)]
73pub trait CombinedRegister: Copy + Clone + Eq + PartialEq + Debug {
74    /// Returns the index of the register.
75    fn to_index(&self) -> RegisterIndex;
76    /// Convert from a GPR register
77    fn from_gpr(x: u16) -> Self;
78    /// Convert from an SIMD register
79    fn from_simd(x: u16) -> Self;
80}
wasmer_compiler_singlepass/location.rs

wasmer_compiler_singlepass/
location.rs
