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core: add RustRange

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lyken 2024-08-25 20:26:57 +08:00
parent a6e1d354b6
commit b38d9000f8
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3 changed files with 77 additions and 11 deletions

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@ -46,4 +46,9 @@ extern "C"
{ {
return range::len(start, stop, step); return range::len(start, stop, step);
} }
int64_t __nac3_range_len_i64(int64_t start, int64_t stop, int64_t step)
{
return range::len(start, stop, step);
}
} }

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@ -609,18 +609,30 @@ pub fn setup_irrt_exceptions<'ctx>(
} }
} }
pub fn call_nac3_range_len_i32<'ctx, G: CodeGenerator + ?Sized>( pub fn call_nac3_range_len<'ctx, G: CodeGenerator + ?Sized, N: IntKind<'ctx>>(
generator: &mut G, generator: &mut G,
ctx: &mut CodeGenContext<'ctx, '_>, ctx: &mut CodeGenContext<'ctx, '_>,
start: Instance<'ctx, Int<Int32>>, int_kind: N,
stop: Instance<'ctx, Int<Int32>>, start: IntValue<'ctx>,
step: Instance<'ctx, Int<Int32>>, stop: IntValue<'ctx>,
) -> Instance<'ctx, Int<Int32>> { step: IntValue<'ctx>,
CallFunction::begin(generator, ctx, "__nac3_range_len_i32") ) -> Instance<'ctx, Int<N>> {
let start = Int(int_kind).check_value(generator, ctx.ctx, start).unwrap();
let stop = Int(int_kind).check_value(generator, ctx.ctx, stop).unwrap();
let step = Int(int_kind).check_value(generator, ctx.ctx, step).unwrap();
let bit_width = int_kind.get_int_type(generator, ctx.ctx).get_bit_width();
let func_name = match bit_width {
32 => "__nac3_range_len_i32",
64 => "__nac3_range_len_i64",
_ => panic!("{bit_width}-bits ints not supported"), // We could add more variants when necessary.
};
CallFunction::begin(generator, ctx, func_name)
.arg(start) .arg(start)
.arg(stop) .arg(stop)
.arg(step) .arg(step)
.returning_auto("range_len") .returning("range_len", Int(int_kind))
} }
pub fn call_nac3_ndarray_util_assert_shape_no_negative<'ctx, G: CodeGenerator + ?Sized>( pub fn call_nac3_ndarray_util_assert_shape_no_negative<'ctx, G: CodeGenerator + ?Sized>(

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@ -1,6 +1,6 @@
use inkwell::{values::IntValue, IntPredicate}; use inkwell::{values::IntValue, IntPredicate};
use crate::codegen::{irrt::call_nac3_range_len_i32, model::*, CodeGenContext, CodeGenerator}; use crate::codegen::{irrt::call_nac3_range_len, model::*, CodeGenContext, CodeGenerator};
use super::any::AnyObject; use super::any::AnyObject;
@ -63,6 +63,45 @@ pub fn assert_range_step_non_zero<'ctx, G: CodeGenerator + ?Sized>(
); );
} }
/// A Rust structure that has [`Range`] utilities and looks like a [`Range`] but
/// `start`, `stop` and `step` are held by LLVM registers only.
///
/// This structure exists because many implementations use [`Range`] utilities but
/// it might not be good to alloca an actual [`Range`] value on the stack in order
/// to perform calculations.
pub struct RustRange<'ctx, N: IntKind<'ctx>> {
pub start: Instance<'ctx, Int<N>>,
pub stop: Instance<'ctx, Int<N>>,
pub step: Instance<'ctx, Int<N>>,
}
impl<'ctx, N: IntKind<'ctx>> RustRange<'ctx, N> {
pub fn assert_step_non_zero<G: CodeGenerator + ?Sized>(
&self,
generator: &mut G,
ctx: &mut CodeGenContext<'ctx, '_>,
) {
assert_range_step_non_zero(generator, ctx, self.step.value);
}
/// Calculate the `len()` of this range.
pub fn len<G: CodeGenerator + ?Sized>(
&self,
generator: &mut G,
ctx: &mut CodeGenContext<'ctx, '_>,
) -> Instance<'ctx, Int<N>> {
let int_kind = self.start.model.0;
call_nac3_range_len(
generator,
ctx,
int_kind,
self.start.value,
self.stop.value,
self.step.value,
)
}
}
// TODO: `RangeObject` in the future will have range32, range64 // TODO: `RangeObject` in the future will have range32, range64
/// A NAC3 Python range object. /// A NAC3 Python range object.
@ -84,14 +123,24 @@ impl<'ctx> RangeObject<'ctx> {
RangeObject { instance } RangeObject { instance }
} }
/// Convert into a [`RustRange`].
pub fn as_rust_range<G: CodeGenerator + ?Sized>(
&self,
generator: &mut G,
ctx: &mut CodeGenContext<'ctx, '_>,
) -> RustRange<'ctx, Int32> {
let (start, stop, step) = self.instance.destructure(generator, ctx);
RustRange { start, stop, step }
}
/// Get the `len()` of this range. /// Get the `len()` of this range.
pub fn len<G: CodeGenerator + ?Sized>( pub fn len<G: CodeGenerator + ?Sized>(
&self, &self,
generator: &mut G, generator: &mut G,
ctx: &mut CodeGenContext<'ctx, '_>, ctx: &mut CodeGenContext<'ctx, '_>,
) -> Instance<'ctx, Int<Int32>> { ) -> Instance<'ctx, Int<Int32>> {
let (start, stop, step) = self.instance.destructure(generator, ctx); let range = self.as_rust_range(generator, ctx);
assert_range_step_non_zero(generator, ctx, step.value); range.assert_step_non_zero(generator, ctx);
call_nac3_range_len_i32(generator, ctx, start, stop, step) range.len(generator, ctx)
} }
} }