TROWEXPAND

Tile Operation Diagram

Introduction

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

Math Interpretation

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

$${\mathrm{d}\mathrm{s}\mathrm{t}}_{i,j}={\mathrm{s}\mathrm{r}\mathrm{c}}_{i,0}$$

Assembly Syntax

Synchronous form:

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

AS Level 1 (SSA)

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

AS Level 2 (DPS)

pto.trowexpand 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 TROWEXPAND(TileDataDst &dst, TileDataSrc &src, WaitEvents &... events);

Constraints

Implementation checks (NPU):

• Tile Type: dst and src must be TileType::Vec.
• Tile layout: ND fractal (isRowMajor and SLayout::NoneBox) for both src and dst.
• Data type: A2A3/A5 element types must be one of: int8_t or uint8_t or int16_t or uint16_t or int32_t or uint32_t or half or bfloat16_t or float.
• Runtime valid checks:
  • A2A3: returns early if any of dstValidRow, dstValidCol, srcValidRow, srcValidCol is zero.
  • A5: asserts srcValidRow == dstValidRow and asserts srcValidRow != 0 && srcValidCol != 0.

Examples

Auto

#include <pto/pto-inst.hpp>

using namespace pto;

void example_auto() {
  using SrcT = Tile<TileType::Vec, float, 16, 16>;
  using DstT = Tile<TileType::Vec, float, 16, 16>;
  SrcT src;
  DstT dst;
  TROWEXPAND(dst, src);
}

Manual

#include <pto/pto-inst.hpp>

using namespace pto;

void example_manual() {
  using SrcT = Tile<TileType::Vec, float, 16, 16>;
  using DstT = Tile<TileType::Vec, float, 16, 16>;
  SrcT src;
  DstT dst;
  TASSIGN(src, 0x1000);
  TASSIGN(dst, 0x2000);
  TROWEXPAND(dst, src);
}

ASM Form Examples

Auto Mode

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

Manual Mode

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

PTO Assembly Form

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