use runmat_accelerate_api::GpuTensorHandle;
use runmat_builtins::{ComplexTensor, Tensor, Value};
use runmat_macros::runtime_builtin;
use crate::builtins::common::random_args::complex_tensor_into_value;
use crate::builtins::common::spec::{
BuiltinFusionSpec, ConstantStrategy, FusionError, FusionExprContext, FusionKernelTemplate,
ScalarType, ShapeRequirements,
};
use crate::builtins::common::{gpu_helpers, tensor};
use crate::builtins::math::type_resolvers::numeric_unary_type;
use crate::{build_runtime_error, BuiltinResult, RuntimeError};
const BUILTIN_NAME: &str = "deg2rad";
const DEG_TO_RAD: f64 = std::f64::consts::PI / 180.0;
#[runmat_macros::register_fusion_spec(
builtin_path = "crate::builtins::math::trigonometry::deg2rad"
)]
pub const FUSION_SPEC: BuiltinFusionSpec = BuiltinFusionSpec {
name: "deg2rad",
shape: ShapeRequirements::BroadcastCompatible,
constant_strategy: ConstantStrategy::InlineLiteral,
elementwise: Some(FusionKernelTemplate {
scalar_precisions: &[ScalarType::F32, ScalarType::F64],
wgsl_body: |ctx: &FusionExprContext| {
let input = ctx.inputs.first().ok_or(FusionError::MissingInput(0))?;
match ctx.scalar_ty {
ScalarType::F64 => Ok(format!("({input} * f64({DEG_TO_RAD}))")),
ScalarType::F32 => Ok(format!("({input} * {:.10})", std::f32::consts::PI / 180.0)),
other => Err(FusionError::UnsupportedPrecision(other)),
}
},
}),
reduction: None,
emits_nan: false,
notes: "Fusion emits a multiplication by pi/180 for degree-to-radian conversion.",
};
fn builtin_error(message: impl Into<String>) -> RuntimeError {
build_runtime_error(message)
.with_builtin(BUILTIN_NAME)
.build()
}
#[runtime_builtin(
name = "deg2rad",
category = "math/trigonometry",
summary = "Convert angles from degrees to radians.",
keywords = "deg2rad,degrees,radians,angle,trigonometry,gpu",
accel = "unary",
type_resolver(numeric_unary_type),
builtin_path = "crate::builtins::math::trigonometry::deg2rad"
)]
async fn deg2rad_builtin(value: Value) -> BuiltinResult<Value> {
match value {
Value::GpuTensor(handle) => deg2rad_gpu(handle).await,
Value::Complex(re, im) => Ok(Value::Complex(re * DEG_TO_RAD, im * DEG_TO_RAD)),
Value::ComplexTensor(tensor) => deg2rad_complex_tensor(tensor),
Value::String(_) | Value::StringArray(_) => {
Err(builtin_error("deg2rad: expected numeric input"))
}
other => deg2rad_real(other),
}
}
async fn deg2rad_gpu(handle: GpuTensorHandle) -> BuiltinResult<Value> {
let tensor = gpu_helpers::gather_tensor_async(&handle).await?;
deg2rad_tensor(tensor).map(tensor::tensor_into_value)
}
fn deg2rad_real(value: Value) -> BuiltinResult<Value> {
let tensor = tensor::value_into_tensor_for(BUILTIN_NAME, value).map_err(builtin_error)?;
deg2rad_tensor(tensor).map(tensor::tensor_into_value)
}
fn deg2rad_tensor(tensor: Tensor) -> BuiltinResult<Tensor> {
let data = tensor
.data
.iter()
.map(|&value| value * DEG_TO_RAD)
.collect::<Vec<_>>();
Tensor::new(data, tensor.shape.clone()).map_err(|err| builtin_error(format!("deg2rad: {err}")))
}
fn deg2rad_complex_tensor(tensor: ComplexTensor) -> BuiltinResult<Value> {
let data = tensor
.data
.iter()
.map(|&(re, im)| (re * DEG_TO_RAD, im * DEG_TO_RAD))
.collect::<Vec<_>>();
let converted = ComplexTensor::new(data, tensor.shape.clone())
.map_err(|err| builtin_error(format!("deg2rad: {err}")))?;
Ok(complex_tensor_into_value(converted))
}
#[cfg(test)]
pub(crate) mod tests {
use super::*;
use futures::executor::block_on;
use runmat_builtins::{IntValue, LogicalArray, ResolveContext, Type};
fn deg2rad_builtin(value: Value) -> BuiltinResult<Value> {
block_on(super::deg2rad_builtin(value))
}
fn error_message(err: RuntimeError) -> String {
err.message().to_string()
}
#[test]
fn deg2rad_type_preserves_tensor_shape() {
let out = numeric_unary_type(
&[Type::Tensor {
shape: Some(vec![Some(2), Some(3)]),
}],
&ResolveContext::new(Vec::new()),
);
assert_eq!(
out,
Type::Tensor {
shape: Some(vec![Some(2), Some(3)])
}
);
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test::wasm_bindgen_test)]
#[test]
fn deg2rad_scalar() {
let result = deg2rad_builtin(Value::Num(90.0)).expect("deg2rad");
match result {
Value::Num(value) => assert!((value - std::f64::consts::FRAC_PI_2).abs() < 1e-12),
other => panic!("expected scalar result, got {other:?}"),
}
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test::wasm_bindgen_test)]
#[test]
fn deg2rad_tensor_preserves_shape() {
let tensor = Tensor::new(vec![0.0, 30.0, 45.0, 60.0, 90.0], vec![1, 5]).unwrap();
let result = deg2rad_builtin(Value::Tensor(tensor)).expect("deg2rad");
match result {
Value::Tensor(tensor) => {
assert_eq!(tensor.shape, vec![1, 5]);
let expected = [
0.0,
std::f64::consts::PI / 6.0,
std::f64::consts::PI / 4.0,
std::f64::consts::PI / 3.0,
std::f64::consts::FRAC_PI_2,
];
for (actual, expected) in tensor.data.iter().zip(expected) {
assert!((actual - expected).abs() < 1e-12);
}
}
other => panic!("expected tensor result, got {other:?}"),
}
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test::wasm_bindgen_test)]
#[test]
fn deg2rad_int_promotes() {
let result = deg2rad_builtin(Value::Int(IntValue::I32(180))).expect("deg2rad");
match result {
Value::Num(value) => assert!((value - std::f64::consts::PI).abs() < 1e-12),
other => panic!("expected scalar result, got {other:?}"),
}
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test::wasm_bindgen_test)]
#[test]
fn deg2rad_logical_array_promotes() {
let logical = LogicalArray::new(vec![0, 1], vec![1, 2]).unwrap();
let result = deg2rad_builtin(Value::LogicalArray(logical)).expect("deg2rad");
match result {
Value::Tensor(tensor) => {
assert_eq!(tensor.shape, vec![1, 2]);
assert_eq!(tensor.data[0], 0.0);
assert!((tensor.data[1] - DEG_TO_RAD).abs() < 1e-12);
}
other => panic!("expected tensor result, got {other:?}"),
}
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test::wasm_bindgen_test)]
#[test]
fn deg2rad_complex_scales_both_parts() {
let result = deg2rad_builtin(Value::Complex(180.0, 90.0)).expect("deg2rad");
match result {
Value::Complex(re, im) => {
assert!((re - std::f64::consts::PI).abs() < 1e-12);
assert!((im - std::f64::consts::FRAC_PI_2).abs() < 1e-12);
}
other => panic!("expected complex result, got {other:?}"),
}
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test::wasm_bindgen_test)]
#[test]
fn deg2rad_string_errors() {
let err = deg2rad_builtin(Value::String("90".into())).expect_err("expected error");
assert!(error_message(err).contains("deg2rad: expected numeric input"));
}
}