TIMG2COL

Tile Operation Diagram

Introduction

Transform an input feature-map tile (e.g. NC1HWC0 layout) into an im2col-style matrix tile for convolution-like workloads. Parameters are provided via Img2colTileConfig and (posM, posK) offsets.

C++ Intrinsic

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

PTO_INST RecordEvent TIMG2COL(TileData &dst, ConvTileData &src, uint16_t posM = 0, uint16_t posK = 0,
                              WaitEvents&... events);

Constraints

• This instruction is target/implementation-specific. See include/pto/npu/*/TImg2col.hpp for the supported tile types/layouts and config fields.

Math Interpretation

Unless otherwise specified, semantics are defined over the valid region and target-dependent behavior is marked as implementation-defined.

Assembly Syntax

AS Level 1 (SSA)

%dst = pto.timg2col %src : !pto.tile<...> -> !pto.tile<...>

AS Level 2 (DPS)

pto.timg2col ins(%src : !pto.tile_buf<...>) outs(%dst : !pto.tile_buf<...>)

Examples

See related examples in docs/isa/ and docs/coding/tutorials/.

ASM Form Examples

Auto Mode

# Auto mode: compiler/runtime-managed placement and scheduling.
%dst = pto.timg2col %src : !pto.tile<...> -> !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.timg2col %src : !pto.tile<...> -> !pto.tile<...>

PTO Assembly Form

%dst = pto.timg2col %src : !pto.tile<...> -> !pto.tile<...>
# AS Level 2 (DPS)
pto.timg2col ins(%src : !pto.tile_buf<...>) outs(%dst : !pto.tile_buf<...>)