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Mojo struct
DecodeSM100QKTSS_FP8
struct DecodeSM100QKTSS_FP8[operand_type: DType, accum_type: DType, *, config: MLA_SM100_Decode_Config]
Tensor accumulator for the native FP8 QK^T MMA with both Q and K in FP8 SMEM.
Parameters
- operand_type (
DType): FP8 element type of the Q and K operands in SMEM. - accum_type (
DType): Accumulator dtype used for the QK^T MMA result in TMEM. - config (
MLA_SM100_Decode_Config): Decode config supplying MMA tile dimensions and swizzle modes.
Implemented traits
AnyType,
Copyable,
Deinitable,
ImplicitlyCopyable,
Movable,
RegisterPassable,
TrivialRegisterPassable
comptime members
BK
comptime BK = config.BK_QK
MMA_K
comptime MMA_K = 32
MMA_M
comptime MMA_M = config.MMA_M
MMA_N
comptime MMA_N = config.MMA_QK_N
num_k_mmas
comptime num_k_mmas = (config // Int(32))
operand_size
comptime operand_size = size_of[operand_type]()
UMMAInstDesc
comptime UMMAInstDesc = UMMAInsDescriptor.create[accum_type, operand_type, operand_type, Index[Int, Int, dtype=DType.uint32](config, config)]()
Methods
descriptor_q_block
static def descriptor_q_block(q_smem: Pointer[Scalar[operand_type], MutAnyOrigin, address_space=AddressSpace.SHARED]) -> MMASmemDescriptorPair
Returns:
descriptor_k_block
static def descriptor_k_block(kv_smem: Pointer[Scalar[operand_type], MutAnyOrigin, address_space=AddressSpace.SHARED]) -> MMASmemDescriptorPair
Returns:
mma
static def mma[*, stage_idx: Int = Int(0)](a: MMASmemDescriptorPair, b: MMASmemDescriptorPair, c: UInt32, *, c_scale: UInt32, elect: Int32)