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Enable opt-in wider gfx1250 FP8 WMMA #14391

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Merged
illsilin merged 1 commit into from
Oct 27, 2026
Merged

Enable opt-in wider gfx1250 FP8 WMMA #14391

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9 changes: 7 additions & 2 deletions projects/composablekernel/include/ck_tile/ops/gemm/pipeline/tile_gemm_shape.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -101,7 +101,10 @@ struct is_cluster_tile_gemm_shape<
{
};

template <typename PrecType, index_t M_Warp_Tile, bool IsFlatMM = false>
template <typename PrecType,
index_t M_Warp_Tile,
bool IsFlatMM = false,
bool WiderInstruction = false>
constexpr index_t get_k_warp_tile()
{
#if CK_TILE_USE_WMMA
Expand All @@ -117,7 +120,9 @@ constexpr index_t get_k_warp_tile()
else
{
constexpr bool is_8bit = sizeof(PrecType) == 1;
return is_8bit ? 64 : 32;
constexpr bool is_8bit_float =
std::is_same_v<PrecType, fp8_t> || std::is_same_v<PrecType, bf8_t>;
return WiderInstruction && is_8bit_float ? 128 : (is_8bit ? 64 : 32);
}
#else
return 16;
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