TEXPANDS¶

Tile Operation Diagram¶

Introduction¶

Broadcast a scalar into a destination tile.

Math Interpretation¶

For each element (i, j) in the valid region:

Assembly Syntax¶

PTO-AS form: see PTO-AS Specification.

Synchronous form:

%dst = texpands %scalar : f32, !pto.tile<...>

IR Level 1 (SSA)¶

%dst = pto.texpands %scalar : dtype -> !pto.tile<...>

IR Level 2 (DPS)¶

pto.texpands ins(%scalar : dtype) outs(%dst : !pto.tile_buf<...>)

C++ Intrinsic¶

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

template <typename TileData, typename... WaitEvents>
PTO_INST RecordEvent TEXPANDS(TileData& dst, typename TileData::DType scalar, WaitEvents&... events);

Constraints¶

• Implementation checks (A2A3):
• For TileType::Vec :
  • TileData::DType must be one of: int32_t, int16_t, half, float.
  • Tile layout must be row-major (TileData::isRowMajor).
  • Static valid bounds: TileData::ValidRow <= TileData::Rows and TileData::ValidCol <= TileData::Cols.
• For TileType::Mat :
  • TileData::DType must be one of: uint8_t, int8_t, uint16_t, int16_t, uint32_t, int32_t, half, float.
  • Static valid bounds: The range of TileData::Rows * TileData::Cols * sizeof(T) / 32 is [1, 32767].
• Implementation checks (A5):
• For TileType::Vec :
  • TileData::DType must be one of: uint8_t, int8_t, uint16_t, int16_t, uint32_t, int32_t, half, float.
  • Tile layout must be row-major (TileData::isRowMajor).
  • Static valid bounds: TileData::ValidRow <= TileData::Rows and TileData::ValidCol <= TileData::Cols.
• For TileType::Mat :
  • TileData::DType must be one of: uint8_t, int8_t, uint16_t, int16_t, uint32_t, int32_t, half, float.
  • ForTileDataDst::layout == pto::Layout::NC1HWC0 || TileDataDst::layout == pto::Layout::FRACTAL_Z:
  • The range of convtile's (shape0 * shape1 * shape2 * shape3) is [1, 32767].
  • ForTileDataDst::layout == pto::Layout::NDC1HWC0 || TileDataDst::layout == pto::Layout::FRACTAL_Z_3D:
  • The range of convtile's (shape0 * shape1 * shape2 * shape3 * shape4) is [1, 32767].
• Valid region:
• For TileType::Vec :
  • The op fills dst over dst.GetValidRow() / dst.GetValidCol().
• For TileType::Mat :
  • For Tile : The op fills dst over TileData::Rows / TileData::Cols.
  • For ConvTile : The op fills dst over ConvTileData's shape.

Examples¶

Auto¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_auto() {
  using TileT = Tile<TileType::Vec, float, 16, 16>;
  TileT dst;
  TEXPANDS(dst, 0.0f);
}

Manual¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_manual() {
  using TileT = Tile<TileType::Vec, float, 16, 16>;
  TileT dst;
  TASSIGN(dst, 0x1000);
  TEXPANDS(dst, 0.0f);
}

ASM Form Examples¶

Auto Mode¶

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

PTO Assembly Form¶

%dst = texpands %scalar : f32, !pto.tile<...>
# IR Level 2 (DPS)
pto.texpands ins(%scalar : dtype) outs(%dst : !pto.tile_buf<...>)