TMAXS

Tile Operation Diagram

TMAXS tile operation

Introduction

Elementwise max of a tile and a scalar: max(src, scalar).

Math Interpretation

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

\[ \mathrm{dst}_{i,j} = \max(\mathrm{src}_{i,j}, \mathrm{scalar}) \]

Assembly Syntax

PTO-AS form: see PTO-AS Specification.

Synchronous form:

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

AS Level 1 (SSA)

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

AS Level 2 (DPS)

pto.tmaxs 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 TMAXS(TileDataDst& dst, TileDataSrc& src, typename TileDataSrc::DType scalar, WaitEvents&... events);

Constraints

  • Implementation checks (A2A3):
    • TileData::DType must be one of: int32_t, int16_t, half, float.
    • Tile layout must be row-major (TileData::isRowMajor).
  • Implementation checks (A5):
    • TileData::DType must be one of: int32_t, uint32_t, float, int16_t, uint16_t, half, bfloat16_t, uint8_t, int8_t.
    • Tile layout must be row-major (TileData::isRowMajor).
  • Common constraints:
    • Tile location must be vector (TileData::Loc == TileType::Vec).
    • Static valid bounds: TileData::ValidRow <= TileData::Rows and TileData::ValidCol <= TileData::Cols.
    • Runtime: dst and src must have the same valid row/col.
    • Scalar type must match the Tile data type.
  • 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;
  TMAXS(out, x, 0.0f);
}

ASM Form Examples

Auto Mode

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

PTO Assembly Form

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