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Add support for casting.

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This commit is contained in:
Adam Wick
2023-06-17 15:10:16 -07:00
parent b4ad24030f
commit 041c0a497e
15 changed files with 355 additions and 10 deletions
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67
src/backend/into_crane.rs
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@@ -1,6 +1,7 @@
use std::collections::HashMap;
use crate::ir::{Expression, Primitive, Program, Statement, Value, ValueOrRef};
use crate::eval::PrimitiveType;
use crate::ir::{Expression, Primitive, Program, Statement, Type, Value, ValueOrRef};
use crate::syntax::ConstantType;
use cranelift_codegen::entity::EntityRef;
use cranelift_codegen::ir::{
@@ -307,6 +308,70 @@ impl Expression {
Err(BackendError::VariableLookupFailure(name))
}
Expression::Cast(_, target_type, expr) => {
let (val, val_type) =
expr.into_crane(builder, local_variables, global_variables)?;
match (val_type, &target_type) {
(ConstantType::I8, Type::Primitive(PrimitiveType::I8)) => Ok((val, val_type)),
(ConstantType::I8, Type::Primitive(PrimitiveType::I16)) => {
Ok((builder.ins().sextend(types::I16, val), ConstantType::I16))
}
(ConstantType::I8, Type::Primitive(PrimitiveType::I32)) => {
Ok((builder.ins().sextend(types::I32, val), ConstantType::I32))
}
(ConstantType::I8, Type::Primitive(PrimitiveType::I64)) => {
Ok((builder.ins().sextend(types::I64, val), ConstantType::I64))
}
(ConstantType::I16, Type::Primitive(PrimitiveType::I16)) => Ok((val, val_type)),
(ConstantType::I16, Type::Primitive(PrimitiveType::I32)) => {
Ok((builder.ins().sextend(types::I32, val), ConstantType::I32))
}
(ConstantType::I16, Type::Primitive(PrimitiveType::I64)) => {
Ok((builder.ins().sextend(types::I64, val), ConstantType::I64))
}
(ConstantType::I32, Type::Primitive(PrimitiveType::I32)) => Ok((val, val_type)),
(ConstantType::I32, Type::Primitive(PrimitiveType::I64)) => {
Ok((builder.ins().sextend(types::I64, val), ConstantType::I64))
}
(ConstantType::I64, Type::Primitive(PrimitiveType::I64)) => Ok((val, val_type)),
(ConstantType::U8, Type::Primitive(PrimitiveType::U8)) => Ok((val, val_type)),
(ConstantType::U8, Type::Primitive(PrimitiveType::U16)) => {
Ok((builder.ins().uextend(types::I16, val), ConstantType::U16))
}
(ConstantType::U8, Type::Primitive(PrimitiveType::U32)) => {
Ok((builder.ins().uextend(types::I32, val), ConstantType::U32))
}
(ConstantType::U8, Type::Primitive(PrimitiveType::U64)) => {
Ok((builder.ins().uextend(types::I64, val), ConstantType::U64))
}
(ConstantType::U16, Type::Primitive(PrimitiveType::U16)) => Ok((val, val_type)),
(ConstantType::U16, Type::Primitive(PrimitiveType::U32)) => {
Ok((builder.ins().uextend(types::I32, val), ConstantType::U32))
}
(ConstantType::U16, Type::Primitive(PrimitiveType::U64)) => {
Ok((builder.ins().uextend(types::I64, val), ConstantType::U64))
}
(ConstantType::U32, Type::Primitive(PrimitiveType::U32)) => Ok((val, val_type)),
(ConstantType::U32, Type::Primitive(PrimitiveType::U64)) => {
Ok((builder.ins().uextend(types::I64, val), ConstantType::U64))
}
(ConstantType::U64, Type::Primitive(PrimitiveType::U64)) => Ok((val, val_type)),
_ => Err(BackendError::InvalidTypeCast {
from: val_type.into(),
to: target_type,
}),
}
}
Expression::Primitive(_, prim, mut vals) => {
let mut values = vec![];
let mut first_type = None;