TSHRS

Tile Operation Diagram

Introduction

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

Math Interpretation

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

$${\mathrm{d}\mathrm{s}\mathrm{t}}_{i,j}={\mathrm{s}\mathrm{r}\mathrm{c}}_{i,j}\gg \mathrm{s}\mathrm{c}\mathrm{a}\mathrm{l}\mathrm{a}\mathrm{r}$$

Assembly Syntax

Synchronous form:

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

AS Level 1 (SSA)

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

AS Level 2 (DPS)

pto.tshrs 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 TSHRS(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;
  TSHRS(dst, src, 0x2);
}

ASM Form Examples

Auto Mode

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

PTO Assembly Form

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