bjoernager/rust
bjoernager/rust
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Add initial support for different int sizes.

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This commit is contained in:
Scott Olson 2016-03-12 23:15:53 -06:00
parent 3f96b3a122
commit 397dbd909a
3 changed files with 25 additions and 11 deletions
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19
src/interpreter.rs
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@ -5,7 +5,7 @@ use rustc::mir::repr as mir;
use std::error::Error;
use std::fmt;
use memory::{FieldRepr, Memory, Pointer, Repr};
use memory::{FieldRepr, IntRepr, Memory, Pointer, Repr};
const TRACE_EXECUTION: bool = true;
@ -321,13 +321,14 @@ impl<'a, 'tcx: 'a> Interpreter<'a, 'tcx> {
ty::AdtKind::Struct => self.assign_to_product(dest, &dest_repr, operands),
ty::AdtKind::Enum => match dest_repr {
Repr::Sum { discr_size, ref variants, .. } =>
Repr::Sum { discr_size, ref variants, .. } => {
// TODO(tsion): Write the discriminant value.
self.assign_to_product(
dest.offset(discr_size),
&variants[variant_idx],
operands
),
)
}
_ => panic!("expected Repr::Sum target"),
}
},
@ -416,7 +417,8 @@ impl<'a, 'tcx: 'a> Interpreter<'a, 'tcx> {
match *const_val {
Float(_f) => unimplemented!(),
Int(n) => {
let ptr = self.memory.allocate(Repr::Int.size());
// TODO(tsion): Check int constant type.
let ptr = self.memory.allocate(8);
try!(self.memory.write_int(ptr, n));
Ok(ptr)
}
@ -449,9 +451,16 @@ impl<'a, 'tcx: 'a> Interpreter<'a, 'tcx> {
// TODO(tsion): Cache these outputs.
fn ty_to_repr(&self, ty: ty::Ty<'tcx>) -> Repr {
use syntax::ast::IntTy;
match ty.sty {
ty::TyBool => Repr::Bool,
ty::TyInt(_) => Repr::Int,
ty::TyInt(IntTy::Is) => unimplemented!(),
ty::TyInt(IntTy::I8) => Repr::Int(IntRepr::I8),
ty::TyInt(IntTy::I16) => Repr::Int(IntRepr::I16),
ty::TyInt(IntTy::I32) => Repr::Int(IntRepr::I32),
ty::TyInt(IntTy::I64) => Repr::Int(IntRepr::I64),
ty::TyTuple(ref fields) => self.make_product_repr(fields.iter().cloned()),
ty::TyEnum(adt_def, ref subst) => {