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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,138 @@ | ||
| use metal::{Buffer, Device, Function, Library, CompileOptions}; | ||
| use std::collections::HashMap; | ||
| use std::sync::RwLock; | ||
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| static UNARY: &'static str = include_str!("unary.metal"); | ||
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| pub enum Error {} | ||
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| pub struct Kernels { | ||
| libraries: RwLock<HashMap<&'static str, Library>>, | ||
| funcs: RwLock<HashMap<String, Function>>, | ||
| } | ||
|
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||
| impl Kernels { | ||
| pub fn new() -> Self { | ||
| let libraries = RwLock::new(HashMap::new()); | ||
| let funcs = RwLock::new(HashMap::new()); | ||
| Self { libraries, funcs } | ||
| } | ||
| pub fn call_unary( | ||
| &self, | ||
| device: &Device, | ||
| name: &str, | ||
| input: &Buffer, | ||
| output: &mut Buffer, | ||
| length: usize, | ||
| ) -> Result<(), Error> { | ||
| if let Some(func) = self | ||
| .funcs | ||
| .read() | ||
| .expect("Failed to acquire kernel lock") | ||
| .get(name) | ||
| { | ||
| call_unary(func, input, output, length); | ||
| } else { | ||
| let func = self | ||
| .libraries | ||
| .write() | ||
| .expect("Failed to acquire lock") | ||
| .entry("unary") | ||
| .or_insert_with(|| { | ||
| device | ||
| .new_library_with_source(UNARY, &CompileOptions::new()) | ||
| .expect("Failed to load unary library") | ||
| }) | ||
| .get_function(name, None) | ||
| .expect("Could not find unary function"); | ||
| self.funcs | ||
| .write() | ||
| .expect("Failed to acquire lock") | ||
| .insert(name.to_string(), func.clone()); | ||
| call_unary(&func, input, output, length); | ||
| } | ||
| Ok(()) | ||
| } | ||
| } | ||
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| fn call_unary(func: &Function, input: &Buffer, output: &Buffer, length: usize) { | ||
| todo!("Call unary"); | ||
| } | ||
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| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
| use metal::{ | ||
| ComputePipelineDescriptor, MTLResourceOptions, MTLResourceUsage, MTLSize, | ||
| }; | ||
|
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| fn approx(v: Vec<f32>, digits: i32) -> Vec<f32>{ | ||
| let b = 10f32.powi(digits); | ||
| v.iter().map(|t| f32::round(t * b) / b).collect() | ||
| } | ||
|
|
||
| #[test] | ||
| fn cos() { | ||
| let v = vec![1.0f32, 2.0, 3.0]; | ||
| let option = metal::MTLResourceOptions::CPUCacheModeDefaultCache; | ||
| let device = Device::system_default().unwrap(); | ||
| let command_queue = device.new_command_queue(); | ||
| let command_buffer = command_queue.new_command_buffer(); | ||
| let encoder = command_buffer.new_compute_command_encoder(); | ||
| let input = device.new_buffer_with_data( | ||
| v.as_ptr() as *const core::ffi::c_void, | ||
| (v.len() * core::mem::size_of::<f32>()) as u64, | ||
| option, | ||
| ); | ||
| let output = device.new_buffer((v.len() * core::mem::size_of::<f32>()) as u64, option); | ||
| let library = device | ||
| .new_library_with_source(UNARY, &CompileOptions::new()) | ||
| .expect("Failed to load unary library"); | ||
| let func = library.get_function("cos", None).unwrap(); | ||
| let argument_encoder = func.new_argument_encoder(0); | ||
| let arg_buffer = device.new_buffer( | ||
| argument_encoder.encoded_length(), | ||
| MTLResourceOptions::empty(), | ||
| ); | ||
| argument_encoder.set_argument_buffer(&arg_buffer, 0); | ||
| argument_encoder.set_buffer(0, &input, 0); | ||
| argument_encoder.set_buffer(1, &output, 0); | ||
| let pipeline_state_descriptor = ComputePipelineDescriptor::new(); | ||
| pipeline_state_descriptor.set_compute_function(Some(&func)); | ||
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||
| let pipeline_state = device | ||
| .new_compute_pipeline_state_with_function( | ||
| pipeline_state_descriptor.compute_function().unwrap(), | ||
| ) | ||
| .unwrap(); | ||
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| encoder.set_compute_pipeline_state(&pipeline_state); | ||
| encoder.set_buffer(0, Some(&arg_buffer), 0); | ||
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| encoder.use_resource(&input, MTLResourceUsage::Read); | ||
| encoder.use_resource(&output, MTLResourceUsage::Write); | ||
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| let width = 16; | ||
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| let thread_group_count = MTLSize { | ||
| width, | ||
| height: 1, | ||
| depth: 1, | ||
| }; | ||
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| let thread_group_size = MTLSize { | ||
| width: (v.len() as u64 + width) / width, | ||
| height: 1, | ||
| depth: 1, | ||
| }; | ||
|
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||
| encoder.dispatch_thread_groups(thread_group_count, thread_group_size); | ||
| encoder.end_encoding(); | ||
| command_buffer.commit(); | ||
| command_buffer.wait_until_completed(); | ||
| let expected: Vec<_> = v.iter().map(|v| v.cos()).collect(); | ||
| let results = output.read_to_vec::<f32>(v.len()); | ||
| assert_eq!(approx(results, 4), vec![0.5403, -0.4161, -0.99]); | ||
| assert_eq!(approx(expected, 4), vec![0.5403, -0.4161, -0.99]); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| #include <metal_stdlib> | ||
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| using namespace metal; | ||
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| struct Input { | ||
| device float *input; | ||
| device float *output; | ||
| }; | ||
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| kernel void cos(device Input& args [[ buffer(0) ]], uint index [[thread_position_in_grid]]) | ||
| { | ||
| args.output[index] = cos(args.input[index]); | ||
| } | ||
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