TMAX¶

指令示意图¶

简介¶

两个 Tile 的逐元素最大值。

数学语义¶

对每个元素 (i, j) 在有效区域内：

汇编语法¶

PTO-AS 形式：参见 PTO-AS Specification.

同步形式：

%dst = tmax %src0, %src1 : !pto.tile<...>

AS Level 1 (SSA)¶

%dst = pto.tmax %src0, %src1 : (!pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>

AS Level 2 (DPS)¶

pto.tmax ins(%src0, %src1 : !pto.tile_buf<...>, !pto.tile_buf<...>) outs(%dst : !pto.tile_buf<...>)

AS Level 1（SSA）¶

%dst = pto.tmax %src0, %src1 : (!pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>

AS Level 2（DPS）¶

pto.tmax ins(%src0, %src1 : !pto.tile_buf<...>, !pto.tile_buf<...>) outs(%dst : !pto.tile_buf<...>)

C++ 内建接口¶

声明于 include/pto/common/pto_instr.hpp:

template <typename TileDataDst, typename TileDataSrc0, typename TileDataSrc1, typename... WaitEvents>
PTO_INST RecordEvent TMAX(TileDataDst &dst, TileDataSrc0 &src0, TileDataSrc1 &src1, WaitEvents &... events);

约束¶

• 实现检查 (A2A3):
  • TileData::DType must be one of: int32_t, int16_t, half, float.
  • Tile 布局 must be row-major (TileData::isRowMajor).
  • Tile location must be vector (TileData::Loc == TileType::Vec).
  • Static valid bounds: TileData::ValidRow <= TileData::Rows and TileData::ValidCol <= TileData::Cols.
  • Runtime: src0, src1 and dst tiles should have the same validRow/validCol.
• 实现检查 (A5):
  • TileData::DType must be one of: uint32_t, int32_t, uint16_t, int16_t, uint8_t, int8_t, float, half.
  • Tile 布局 must be row-major (TileData::isRowMajor).
  • Tile location must be vector (TileData::Loc == TileType::Vec).
  • Static valid bounds: TileData::ValidRow <= TileData::Rows and TileData::ValidCol <= TileData::Cols.
  • Runtime: src0, src1 and dst tiles should have the same validRow/validCol.
• 有效区域:
  • The op uses dst.GetValidRow() / dst.GetValidCol() as the iteration domain; src0/src1 are assumed to be compatible (not validated by explicit runtime checks in this op).

示例¶

自动（Auto）¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_auto() {
  using TileT = Tile<TileType::Vec, float, 16, 16>;
  TileT src0, src1, dst;
  TMAX(dst, src0, src1);
}

手动（Manual）¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_manual() {
  using TileT = Tile<TileType::Vec, float, 16, 16>;
  TileT src0, src1, dst;
  TASSIGN(src0, 0x1000);
  TASSIGN(src1, 0x2000);
  TASSIGN(dst,  0x3000);
  TMAX(dst, src0, src1);
}