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Workaround for subgroup arithmetic failing on MoltenVK with AMD GPUs (issue 15846) (llama/15886)

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lksj92hs
2025-09-09 15:01:15 +03:00
committed by Georgi Gerganov
parent 621764b1a5
commit 7fbbb67b47
1 changed files with 6 additions and 0 deletions
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ggml/src/ggml-vulkan/ggml-vulkan.cpp
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@@ -3736,6 +3736,12 @@ static vk_device ggml_vk_get_device(size_t idx) {
device->subgroup_arithmetic = (vk11_props.subgroupSupportedStages & vk::ShaderStageFlagBits::eCompute) &&
(vk11_props.subgroupSupportedOperations & vk::SubgroupFeatureFlagBits::eArithmetic);
#ifdef __APPLE__
// Workaround for subgroup arithmetic failing on MoltenVK with AMD GPUs (issue 15846)
if (device->vendor_id == VK_VENDOR_ID_AMD) {
device->subgroup_arithmetic = false;
}
#endif
device->subgroup_shuffle = (vk11_props.subgroupSupportedStages & vk::ShaderStageFlagBits::eCompute) &&
(vk11_props.subgroupSupportedOperations & vk::SubgroupFeatureFlagBits::eShuffle);
device->subgroup_clustered = (vk11_props.subgroupSupportedStages & vk::ShaderStageFlagBits::eCompute) &&