TCI¶

指令示意图¶

简介¶

生成连续整数序列到目标 Tile 中。

数学语义¶

For a linearized index k over the valid elements:

• Ascending:

$$ \mathrm{dst}_{k} = S + k $$

• Descending:

$$ \mathrm{dst}_{k} = S - k $$

The linearization order depends on the tile layout (implementation-defined).

汇编语法¶

PTO-AS 形式：参见 PTO-AS Specification.

同步形式：

%dst = tci %S {descending = false} : !pto.tile<...>

AS Level 1 (SSA)¶

%dst = pto.tci %scalar {descending = false} : dtype -> !pto.tile<...>

AS Level 2 (DPS)¶

pto.tci ins(%scalar {descending = false} : dtype) outs(%dst : !pto.tile_buf<...>)

AS Level 1（SSA）¶

%dst = pto.tci %scalar {descending = false} : dtype -> !pto.tile<...>

AS Level 2（DPS）¶

pto.tci ins(%scalar {descending = false} : dtype) outs(%dst : !pto.tile_buf<...>)

C++ 内建接口¶

声明于 include/pto/common/pto_instr.hpp:

template <typename TileData, typename T, int descending, typename... WaitEvents>
PTO_INST RecordEvent TCI(TileData &dst, T start, WaitEvents &... events);

约束¶

• 实现检查 (A2A3/A5):
  • TileData::DType must be exactly the same type as the scalar template parameter T.
  • dst/scalar element types must be identical, and must be one of: int32_t, uint32_t, int16_t, uint16_t.
  • TileData::Cols != 1 (this is the condition enforced by the implementation).
• 有效区域:
  • The implementation uses dst.GetValidCol() as the sequence length and does not consult dst.GetValidRow().

示例¶

自动（Auto）¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_auto() {
  using TileT = Tile<TileType::Vec, int32_t, 1, 16>;
  TileT dst;
  TCI<TileT, int32_t, /*descending=*/0>(dst, /*S=*/0);
}

手动（Manual）¶

#include <pto/pto-inst.hpp>

using namespace pto;

void example_manual() {
  using TileT = Tile<TileType::Vec, int32_t, 1, 16>;
  TileT dst;
  TASSIGN(dst, 0x1000);
  TCI<TileT, int32_t, /*descending=*/1>(dst, /*S=*/100);
}