black_box: Add difftest

Author: LegNeato

tests/difftests/tests/Cargo.lock

@@ -38,6 +38,8 @@ members = [
     "lang/core/ops/trig_ops/trig_ops-wgsl",
     "lang/core/ops/vector_swizzle/vector_swizzle-rust",
     "lang/core/ops/vector_swizzle/vector_swizzle-wgsl",
+    "lang/core/intrinsics/black_box_noop/with-black-box",
+    "lang/core/intrinsics/black_box_noop/without-black-box",
 ]
 
 [workspace.package]

tests/difftests/tests/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "black_box-noop-with"
+edition.workspace = true
+
+[lints]
+workspace = true
+
+[lib]
+crate-type = ["dylib"]
+
+# GPU deps
+[dependencies]
+spirv-std.workspace = true
+
+# CPU deps (for the test harness)
+[target.'cfg(not(target_arch = "spirv"))'.dependencies]
+difftest.workspace = true

tests/difftests/tests/lang/core/intrinsics/black_box_noop/with-black-box/Cargo.toml

@@ -0,0 +1,43 @@
+#![no_std]
+
+use core::hint::black_box;
+use spirv_std::spirv;
+
+#[spirv(compute(threads(1)))]
+pub fn main_cs(#[spirv(storage_buffer, descriptor_set = 0, binding = 0)] out: &mut [u32]) {
+    let x = 42i32;
+    let y = black_box(x) as u32;
+
+    let a = 3.14f32;
+    let b = black_box(a).to_bits();
+
+    let v = [1u32, 2, 3, 4];
+    let w = black_box(v);
+
+    let result = black_box(10) + black_box(20);
+
+    let data = 100u32;
+    let ref_data = black_box(&data);
+
+    let pair = (5u32, 6u32);
+    let pair_bb = black_box(pair);
+    let pair_sum = pair_bb.0 + pair_bb.1;
+
+    let _ = black_box(());
+
+    let values = [
+        y, b, w[0], w[1], w[2], w[3], result, *ref_data, pair_sum, 0, 0, 0,
+    ];
+    out[0] = values[0];
+    out[1] = values[1];
+    out[2] = values[2];
+    out[3] = values[3];
+    out[4] = values[4];
+    out[5] = values[5];
+    out[6] = values[6];
+    out[7] = values[7];
+    out[8] = values[8];
+    out[9] = values[9];
+    out[10] = values[10];
+    out[11] = values[11];
+}

tests/difftests/tests/lang/core/intrinsics/black_box_noop/with-black-box/src/lib.rs

@@ -0,0 +1,11 @@
+use difftest::config::{Config, TestMetadata};
+use difftest::scaffold::compute::{RustComputeShader, WgpuComputeTest};
+
+fn main() {
+    let config = Config::from_path(std::env::args().nth(1).unwrap()).unwrap();
+    let test = WgpuComputeTest::new(RustComputeShader::default(), [1, 1, 1], 12 * 4);
+    test.run_test(&config).unwrap();
+    config
+        .write_metadata(&TestMetadata::u32())
+        .expect("Failed to write metadata");
+}

tests/difftests/tests/lang/core/intrinsics/black_box_noop/with-black-box/src/main.rs

@@ -0,0 +1,18 @@
+[package]
+name = "black_box-noop-without"
+edition.workspace = true
+
+[lints]
+workspace = true
+
+[lib]
+crate-type = ["dylib"]
+
+# GPU deps
+[dependencies]
+spirv-std.workspace = true
+
+# CPU deps (for the test harness)
+[target.'cfg(not(target_arch = "spirv"))'.dependencies]
+difftest.workspace = true
+

tests/difftests/tests/lang/core/intrinsics/black_box_noop/without-black-box/Cargo.toml

@@ -0,0 +1,39 @@
+#![no_std]
+
+use spirv_std::spirv;
+
+#[spirv(compute(threads(1)))]
+pub fn main_cs(#[spirv(storage_buffer, descriptor_set = 0, binding = 0)] out: &mut [u32]) {
+    let x = 42i32;
+    let y = x as u32;
+
+    let a = 3.14f32;
+    let b = a.to_bits();
+
+    let v = [1u32, 2, 3, 4];
+    let w = v;
+
+    let result = 10 + 20;
+
+    let data = 100u32;
+    let ref_data = &data;
+
+    let pair = (5u32, 6u32);
+    let pair_sum = pair.0 + pair.1;
+
+    let values = [
+        y, b, w[0], w[1], w[2], w[3], result, *ref_data, pair_sum, 0, 0, 0,
+    ];
+    out[0] = values[0];
+    out[1] = values[1];
+    out[2] = values[2];
+    out[3] = values[3];
+    out[4] = values[4];
+    out[5] = values[5];
+    out[6] = values[6];
+    out[7] = values[7];
+    out[8] = values[8];
+    out[9] = values[9];
+    out[10] = values[10];
+    out[11] = values[11];
+}

tests/difftests/tests/lang/core/intrinsics/black_box_noop/without-black-box/src/lib.rs

@@ -0,0 +1,11 @@
+use difftest::config::{Config, TestMetadata};
+use difftest::scaffold::compute::{RustComputeShader, WgpuComputeTest};
+
+fn main() {
+    let config = Config::from_path(std::env::args().nth(1).unwrap()).unwrap();
+    let test = WgpuComputeTest::new(RustComputeShader::default(), [1, 1, 1], 12 * 4);
+    test.run_test(&config).unwrap();
+    config
+        .write_metadata(&TestMetadata::u32())
+        .expect("Failed to write metadata");
+}