TTRI

指令示意图

TTRI tile operation

简介

生成三角（下/上）掩码 Tile。

数学语义

Let R = dst.GetValidRow() and C = dst.GetValidCol(). Let d = diagonal.

Lower-triangular (isUpperOrLower=0) conceptually produces:

\[ \mathrm{dst}_{i,j} = \begin{cases}1 & j \le i + d \\\\ 0 & \text{otherwise}\end{cases} \]

Upper-triangular (isUpperOrLower=1) conceptually produces:

\[ \mathrm{dst}_{i,j} = \begin{cases}0 & j < i + d \\\\ 1 & \text{otherwise}\end{cases} \]

汇编语法

PTO-AS 形式：参见 PTO-AS Specification.

AS Level 1 (SSA)

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

AS Level 2 (DPS)

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

AS Level 1（SSA）

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

AS Level 2（DPS）

pto.ttri 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 TileData, int isUpperOrLower, typename... WaitEvents>
PTO_INST RecordEvent TTRI(TileData &dst, int diagonal, WaitEvents &... events);

约束

  • isUpperOrLower must be 0 (lower) or 1 (upper).
  • Destination tile must be row-major on some targets (see include/pto/npu/*/TTri.hpp).

示例

See related examples in docs/isa/ and docs/coding/tutorials/.