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Diffstat (limited to 'llvm/docs/AMDGPUUsage.rst')
| -rw-r--r-- | llvm/docs/AMDGPUUsage.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/docs/AMDGPUUsage.rst b/llvm/docs/AMDGPUUsage.rst index e062032..f971bc0 100644 --- a/llvm/docs/AMDGPUUsage.rst +++ b/llvm/docs/AMDGPUUsage.rst @@ -6512,6 +6512,13 @@ operations. ``buffer/global/flat_load/store/atomic`` instructions to global memory are termed vector memory operations. +``global_load_lds`` or ``buffer/global_load`` instructions with the `lds` flag +are LDS DMA loads. They interact with caches as if the loaded data were +being loaded to registers and not to LDS, and so therefore support the same +cache modifiers. They cannot be performed atomically. They implement volatile +(via aux/cpol bit 31) and nontemporal (via metadata) as if they were loads +from the global address space. + Private address space uses ``buffer_load/store`` using the scratch V# (GFX6-GFX8), or ``scratch_load/store`` (GFX9-GFX11). Since only a single thread is accessing the memory, atomic memory orderings are not meaningful, and all |