TSHLS

Tile Operation Diagram

TSHLS tile operation

Introduction

Elementwise shift-left of a tile, shift bits given by scalar.

Math Interpretation

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

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

Assembly Syntax

PTO-AS form: see PTO-AS Specification.

Synchronous form:

%dst = tshls %src, %scalar : !pto.tile<...>, i32

AS Level 1 (SSA)

%dst = pto.tshls %src, %scalar : (!pto.tile<...>, dtype) -> !pto.tile<...>

AS Level 2 (DPS)

pto.tshls ins(%src, %scalar : !pto.tile_buf<...>, dtype) 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 TSHLS(TileDataDst &dst, TileDataSrc &src, typename TileDataDst::DType scalar, WaitEvents &... events);

Constraints

  • Implementation checks (A2A3):
    • Supported element types are int32_t, int, int16_t, uint32_t, unsigned int, and uint16_t.
    • dst and src must use the same element type.
    • dst and src must be vector tiles.
    • Runtime: src.GetValidRow() == dst.GetValidRow() and src.GetValidCol() == dst.GetValidCol().
    • Scalar only supports zero and positive values.
  • Implementation checks (A5):
    • Supported element types are int32_t, int16_t, int8_t, uint32_t, uint16_t, and uint8_t.
    • dst and src must use the same element type.
    • dst and src must be vector tiles.
    • Static valid bounds must satisfy ValidRow <= Rows and ValidCol <= Cols for both tiles.
    • Runtime: src.GetValidRow() == dst.GetValidRow() and src.GetValidCol() == dst.GetValidCol().
    • Scalar only supports zero and positive values.
  • Valid region:
    • The op uses dst.GetValidRow() / dst.GetValidCol() as the iteration domain.

Examples

#include <pto/pto-inst.hpp>

using namespace pto;

void example() {
  using TileDst = Tile<TileType::Vec, uint16_t, 16, 16>;
  using TileSrc = Tile<TileType::Vec, uint16_t, 16, 16>;
  TileDst dst;
  TileSrc src;
  TSHLS(dst, src, 0x2);
}

ASM Form Examples

Auto Mode

# Auto mode: compiler/runtime-managed placement and scheduling.
%dst = pto.tshls %src, %scalar : (!pto.tile<...>, 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.tshls %src, %scalar : (!pto.tile<...>, dtype) -> !pto.tile<...>

PTO Assembly Form

%dst = tshls %src, %scalar : !pto.tile<...>, i32
# AS Level 2 (DPS)
pto.tshls ins(%src, %scalar : !pto.tile_buf<...>, dtype) outs(%dst : !pto.tile_buf<...>)