TPARTMIN

指令示意图

TPARTMIN tile operation

简介

部分逐元素最小值，对不匹配的有效区域具有实现定义的处理方式。

数学语义

对每个元素 (i, j) in the destination valid region:

\[ \mathrm{dst}_{i,j} = \begin{cases} \min(\mathrm{src0}_{i,j}, \mathrm{src1}_{i,j}) & \text{if both inputs are defined at } (i,j) \\ \mathrm{src0}_{i,j} & \text{if only src0 is defined at } (i,j) \\ \mathrm{src1}_{i,j} & \text{if only src1 is defined at } (i,j) \end{cases} \]

汇编语法

PTO-AS 形式：参见 PTO-AS Specification.

同步形式：

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

AS Level 1 (SSA)

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

AS Level 2 (DPS)

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

AS Level 1（SSA）

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

AS Level 2（DPS）

pto.tpartmin 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 TPARTMIN(TileDataDst &dst, TileDataSrc0 &src0, TileDataSrc1 &src1, WaitEvents &... events);

约束

  • 实现检查 (A2A3):
    • dst/src0/src1 element types must be identical, and must be one of: int32_t, int16_t, half, float.
    • All three tiles must be row-major (isRowMajor).
    • Runtime: if dst.GetValidRow() == 0 or dst.GetValidCol() == 0, the op returns early.
    • Runtime: the implementation requires at least one input's valid region to match dst's valid region, and the onther's valid region not greater than dst's valid region (otherwise it asserts).
  • 实现检查 (A5):
    • dst/src0/src1 element types must be identical and must be one of: int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t, half, bfloat16_t, float.
    • Runtime: if any of src0/src1/dst has a zero valid region, the op returns early.
    • Requires src0 and src1 valid region to be <= dst valid region in both dimensions; other patterns are not supported (target-defined behavior).

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;
  TPARTMIN(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);
  TPARTMIN(dst, src0, src1);
}