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Revert "Optimize fmha fwd decode & prefill for gfx950 (#2641)" (#2670)

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This reverts commit b7322a521a.
This commit is contained in:
asleepzzz
2025-08-12 20:27:10 +08:00
committed by GitHub
parent b7322a521a
commit 5b39de4bb6
31 changed files with 639 additions and 3545 deletions
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30
include/ck_tile/ops/reduce/block/block_reduce.hpp
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@@ -14,14 +14,10 @@ namespace ck_tile {
* Y dim must have at least one dim not been reduced
*/
// synchronize reduce result (cross lane reduction and broadcast on replicated dimension)
template <typename AccDistributedTensor_,
typename ReduceFunc,
bool WithBroadcast = true,
bool CrossWarp = true>
template <typename AccDistributedTensor_, typename ReduceFunc, bool WithBroadcast = true>
CK_TILE_DEVICE void block_tile_reduce_sync(AccDistributedTensor_& acc_tensor,
const ReduceFunc& reduce_func,
bool_constant<WithBroadcast> = {},
bool_constant<CrossWarp> = {})
bool_constant<WithBroadcast> = {})
{
using Dstr = typename AccDistributedTensor_::StaticTileDistribution;
using DstrEncode = typename Dstr::DstrEncode;
@@ -60,24 +56,14 @@ CK_TILE_DEVICE void block_tile_reduce_sync(AccDistributedTensor_& acc_tensor,
// reduction sweep forward
static_for<0, nstage, 1>{}([&](auto istage) {
if constexpr(CrossWarp)
{
constexpr index_t lid_delta =
lid_over_rid_derivative * (1 << (nstage - istage - 1));
constexpr index_t lid_delta =
lid_over_rid_derivative * (1 << (nstage - istage - 1));
// pull data from remote lane
const auto v_remote = warp_shuffle_down(v_local, lid_delta);
// pull data from remote lane
const auto v_remote = warp_shuffle_down(v_local, lid_delta);
// reduce
v_local = reduce_func(v_local, v_remote);
}
else
{
// pull data from remote lane
const auto v_swapped_regs = warp_shuffle_down_pair(v_local);
// reduce
v_local = reduce_func(v_swapped_regs.at(0), v_swapped_regs.at(1));
}
// reduce
v_local = reduce_func(v_local, v_remote);
});
}
});