TCOLMAX¶

指令示意图¶

简介¶

通过取行间最大值来归约每一列。

数学语义¶

Let R = src.GetValidRow() and C = src.GetValidCol(). For 0 <= j < C:

汇编语法¶

PTO-AS 形式：参见 PTO-AS Specification.

同步形式：

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

AS Level 1 (SSA)¶

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

AS Level 2 (DPS)¶

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

AS Level 1（SSA）¶

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

AS Level 2（DPS）¶

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

C++ 内建接口¶

声明于 include/pto/common/pto_instr.hpp:

template <typename TileDataOut, typename TileDataIn, typename... WaitEvents>
PTO_INST RecordEvent TCOLMAX(TileDataOut &dst, TileDataIn &src, WaitEvents &... events);

约束¶

实现检查 (NPU):

• Tile location: dst and src must be TileType::Vec.
• Tile 布局: both tiles must be ND fractal (isRowMajor and SLayout::NoneBox).
• 数据类型:
  • A2A3: half, float, int16_t, int32_t.
  • A5: half, float, int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t, bfloat16_t.
• 数据类型一致性: dst.DType == src.DType.
• 运行期有效区域检查:
  • src.GetValidCol() == dst.GetValidCol().
  • If src.GetValidRow() == 0 or src.GetValidCol() == 0, the implementation returns early.

示例¶

自动（Auto）¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_auto() {
  using SrcT = Tile<TileType::Vec, float, 16, 16>;
  using DstT = Tile<TileType::Vec, float, 1, 16>;
  SrcT src;
  DstT dst;
  TCOLMAX(dst, src);
}

手动（Manual）¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_manual() {
  using SrcT = Tile<TileType::Vec, float, 16, 16>;
  using DstT = Tile<TileType::Vec, float, 1, 16>;
  SrcT src;
  DstT dst;
  TASSIGN(src, 0x1000);
  TASSIGN(dst, 0x2000);
  TCOLMAX(dst, src);
}