TSUBS

Tile Operation Diagram

TSUBS tile operation

Introduction

Elementwise subtract a scalar from a tile.

Math Interpretation

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

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

Assembly Syntax

PTO-AS form: see PTO-AS Specification.

Synchronous form:

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

AS Level 1 (SSA)

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

AS Level 2 (DPS)

pto.tsubs 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 TSUBS(TileDataDst &dst, TileDataSrc &src0, typename TileDataSrc::DType scalar, WaitEvents &... events);

Constraints

  • Implementation checks (A2A3):
    • TileData::DType must be one of: int32_t, int, int16_t, half, float16_t, float, float32_t.
    • Tile location must be vector (TileData::Loc == TileType::Vec).
    • Runtime: src0.GetValidRow() == dst.GetValidRow() and src0.GetValidCol() == dst.GetValidCol().
  • Implementation checks (A5):
    • TileData::DType must be one of: int32_t, int, int16_t, half, float16_t, float, float32_t.
    • Tile location must be vector (TileDataDst::Loc == TileType::Vec and TileDataSrc::Loc == TileType::Vec).
    • Static valid bounds: TileDataDst::ValidRow <= TileDataDst::Rows, TileDataDst::ValidCol <= TileDataDst::Cols, TileDataSrc::ValidRow <= TileDataSrc::Rows, and TileDataSrc::ValidCol <= TileDataSrc::Cols.
    • Runtime: src0.GetValidRow() == dst.GetValidRow() and src0.GetValidCol() == dst.GetValidCol().
  • Common constraints:
    • dst and src0 must use the same element type.
    • Scalar type must match TileDataSrc::DType.
  • 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 TileT = Tile<TileType::Vec, float, 16, 16>;
  TileT x, out;
  TSUBS(out, x, 1.0f);
}

ASM Form Examples

Auto Mode

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

PTO Assembly Form

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