TSUBSC¶

指令示意图¶

简介¶

融合逐元素运算：src0 - scalar + src1。

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 = tsubsc %src0, %scalar, %src1 : !pto.tile<...>, f32, !pto.tile<...>

AS Level 1 (SSA)¶

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

AS Level 2 (DPS)¶

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

AS Level 1（SSA）¶

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

AS Level 2（DPS）¶

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

C++ 内建接口¶

声明于 include/pto/common/pto_instr.hpp:

template <typename TileData, typename... WaitEvents>
PTO_INST RecordEvent TSUBSC(TileData& dst, TileData& src0, typename TileData::DType scalar, TileData& 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).
• 实现检查 (A5):
  • TileData::DType must be one of: int32_t, int16_t, half, float.
  • Tile 布局 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, src0 and src1 must have the same valid row/col.
  • Scalar type must match the Tile data type.
• 有效区域:
  • The op uses dst.GetValidRow() / dst.GetValidCol() as the iteration domain.

示例¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example() {
  using TileT = Tile<TileType::Vec, float, 16, 16>;
  TileT a, b, out;
  TSUBSC(out, a, 2.0f, b);
}