diff options
Diffstat (limited to 'source/slang')
| -rw-r--r-- | source/slang/hlsl.meta.slang | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/source/slang/hlsl.meta.slang b/source/slang/hlsl.meta.slang index fe348c60d..739b8579d 100644 --- a/source/slang/hlsl.meta.slang +++ b/source/slang/hlsl.meta.slang @@ -2722,14 +2722,17 @@ matrix<T,N,M> WaveReadLaneFirst(matrix<T,N,M> expr); // NOTE! On GLSL based targets the lane index *must* be a compile time expression! // See https://github.com/KhronosGroup/GLSL/blob/master/extensions/khr/GL_KHR_shader_subgroup.txt +// It is allowed to be 'dynamically uniform within the subgroup' if it's SPIR-V 1.4. +// TODO(JS): For now we'll use 1.4, but aim for the future for the compiler to determine +// if the line the is compile constant, and reduce requirement to 1.3 __generic<T : __BuiltinType> __glsl_extension(GL_KHR_shader_subgroup_ballot) -__spirv_version(1.3) +__spirv_version(1.4) __target_intrinsic(glsl, "subgroupBroadcast($0, $1)") __target_intrinsic(cuda, "__shfl_sync(__activemask(), $0, $1)") T WaveReadLaneAt(T value, int lane); __generic<T : __BuiltinType, let N : int> -__spirv_version(1.3) +__spirv_version(1.4) __target_intrinsic(glsl, "subgroupBroadcast($0, $1)") __target_intrinsic(cuda, "_waveReadLaneAtMultiple($0, $1)") vector<T,N> WaveReadLaneAt(vector<T,N> value, int lane); |