TCOLEXPAND¶

Tile Operation Diagram¶

TCOLEXPAND tile operation

Introduction¶

Broadcast the first element of each source column across the destination column.

Math Interpretation¶

Let R = dst.GetValidRow() and C = dst.GetValidCol(). For 0 <= i < R and 0 <= j < C:

\[ \mathrm{dst}_{i,j} = \mathrm{src}_{0,j} \]

Assembly Syntax¶

PTO-AS form: see PTO-AS Specification.

Synchronous form:

%dst = tcolexpand %src : !pto.tile<...> -> !pto.tile<...>

IR Level 1 (SSA)¶

%dst = pto.tcolexpand %src : !pto.tile<...> -> !pto.tile<...>

IR Level 2 (DPS)¶

pto.tcolexpand ins(%src : !pto.tile_buf<...>) outs(%dst : !pto.tile_buf<...>)

C++ Intrinsic¶

Declared in include/pto/common/pto_instr.hpp:

template <typename TileDataDst, typename TileDataSrc, typename... WaitEvents>
PTO_INST RecordEvent TCOLEXPAND(TileDataDst& dst, TileDataSrc& src, WaitEvents&... events);

Constraints¶

The op iterates over dst.GetValidRow() / dst.GetValidCol().

Examples¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example() {
  using TileT = Tile<TileType::Vec, float, 16, 16>;
  TileT src, dst;
  TCOLEXPAND(dst, src);
}

ASM Form Examples¶

Auto Mode¶

# Auto mode: compiler/runtime-managed placement and scheduling.
%dst = pto.tcolexpand %src : !pto.tile<...> -> !pto.tile<...>

Manual Mode¶

# Manual mode: bind resources explicitly before issuing the instruction.
# Optional for tile operands:
# pto.tassign %arg0, @tile(0x1000)
# pto.tassign %arg1, @tile(0x2000)
%dst = pto.tcolexpand %src : !pto.tile<...> -> !pto.tile<...>

PTO Assembly Form¶

%dst = tcolexpand %src : !pto.tile<...> -> !pto.tile<...>
# IR Level 2 (DPS)
pto.tcolexpand ins(%src : !pto.tile_buf<...>) outs(%dst : !pto.tile_buf<...>)