From bdda8a90cdd44ca822b21233ac988f92d1f20826 Mon Sep 17 00:00:00 2001 From: "Harsh Aggarwal (NVIDIA)" Date: Fri, 1 Aug 2025 14:48:53 +0530 Subject: Fix 7441: CUDA boolean vector layout to use 1-byte elements (#7862) * Fix 7441: CUDA boolean vector layout to use 1-byte elements Boolean vectors (bool1, bool2, bool3, bool4) were incorrectly implemented as integer-based types using 4 bytes per element instead of actual 1-byte boolean elements on CUDA targets. Changes: - Update CUDA prelude to define boolean vectors as structs with bool fields instead of typedef aliases to integer vectors - Implement CUDALayoutRulesImpl::GetVectorLayout to use 1-byte alignment for boolean vectors, matching actual CUDA memory layout behavior - Update make_bool functions to populate struct fields correctly This ensures boolean vectors have the same memory layout as bool[4] arrays: - bool1: 1 byte (was 4 bytes) - bool2: 2 bytes (was 8 bytes) - bool3: 3 bytes (was 12 bytes) - bool4: 4 bytes (was 16 bytes) Fixes memory layout mismatch between Slang reflection API and actual CUDA compilation, achieving 75% memory savings for boolean vector usage. * Fix CI issues - Add and update associated functions and operators * Make boolX same as uchar * Use align construct on struct for boolX * Improve Test case for robust alignment checks * Formatting * Disable selected slangpy tests * add metal check which is slightly different than cuda * Test-1 * Test-2 * Test-3 * Test-4 * ReflectionChange * cleanup and update * _slang_select with plain bool is needed for reverse-loop-checkpoint-test --- tests/reflection/acceleration-structure.slang | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tests/reflection/acceleration-structure.slang') diff --git a/tests/reflection/acceleration-structure.slang b/tests/reflection/acceleration-structure.slang index cfb7d232b..cbff7784d 100644 --- a/tests/reflection/acceleration-structure.slang +++ b/tests/reflection/acceleration-structure.slang @@ -1,6 +1,6 @@ //TEST(64-bit):REFLECTION(filecheck=CHECK): -target cuda -// CHECK: "binding": {"kind": "uniform", "offset": 0, "size": 8}, +// CHECK: "binding": {"kind": "uniform", "offset": 0, "size": 8, "elementStride": 0}, uniform RaytracingAccelerationStructure accel; [numthreads(1,1,1)] -- cgit v1.2.3