TMATMUL_ACC¶
指令示意图¶
简介¶
带累加器输入的矩阵乘法(融合累加)。
数学语义¶
设:
M = aMatrix.GetValidRow()K = aMatrix.GetValidCol()N = bMatrix.GetValidCol()
对于 0 <= i < M 和 0 <= j < N:
\[ \mathrm{C1}_{i,j} = \mathrm{C0}_{i,j} + \sum_{k=0}^{K-1} \mathrm{A}_{i,k} \cdot \mathrm{B}_{k,j} \]
汇编语法¶
PTO-AS 形式:参见 PTO-AS 规范。
同步形式:
%acc1 = tmatmul.acc %acc0, %a, %b : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>
AS Level 1(SSA)¶
%c_out = pto.tmatmul.acc %c_in, %a, %b : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>
AS Level 2(DPS)¶
pto.tmatmul.acc ins(%c_in, %a, %b : !pto.tile_buf<...>, !pto.tile_buf<...>, !pto.tile_buf<...>) outs(%c_out : !pto.tile_buf<...>)
C++ 内建接口¶
声明于 include/pto/common/pto_instr.hpp:
template <typename TileRes, typename TileLeft, typename TileRight, typename... WaitEvents>
PTO_INST RecordEvent TMATMUL_ACC(TileRes &cOutMatrix, TileRes &cInMatrix, TileLeft &aMatrix, TileRight &bMatrix, WaitEvents &... events);
template <AccPhase Phase, typename TileRes, typename TileLeft, typename TileRight, typename... WaitEvents>
PTO_INST RecordEvent TMATMUL_ACC(TileRes &cOutMatrix, TileRes &cInMatrix, TileLeft &aMatrix, TileRight &bMatrix, WaitEvents &... events);
template <AccPhase Phase = AccPhase::Unspecified, typename TileRes, typename TileLeft, typename TileRight,
typename... WaitEvents>
PTO_INST RecordEvent TMATMUL_ACC(TileRes &cMatrix, TileLeft &aMatrix, TileRight &bMatrix, WaitEvents &... events);
约束¶
- 所有来自
TMATMUL的约束都适用于(cOutMatrix, aMatrix, bMatrix)三元组。 - 实现说明 (A2A3/A5):
TMATMUL_ACC_IMPL使用aMatrix.GetValidRow()、aMatrix.GetValidCol()和bMatrix.GetValidCol()作为m/k/n。cInMatrix在当前实现中不通过显式断言进行验证(目标定义的行为)。
示例¶
自动(Auto)¶
#include <pto/pto-inst.hpp>
using namespace pto;
void example_auto() {
using A = TileLeft<half, 16, 16>;
using B = TileRight<half, 16, 16>;
using C = TileAcc<float, 16, 16>;
A a;
B b;
C c0, c1;
TMATMUL_ACC(c1, c0, a, b);
}
手动(Manual)¶
#include <pto/pto-inst.hpp>
using namespace pto;
void example_manual() {
using A = TileLeft<half, 16, 16>;
using B = TileRight<half, 16, 16>;
using C = TileAcc<float, 16, 16>;
A a;
B b;
C c0, c1;
TASSIGN(a, 0x1000);
TASSIGN(b, 0x2000);
TASSIGN(c0, 0x3000);
TASSIGN(c1, 0x4000);
TMATMUL_ACC(c1, c0, a, b);
}
汇编示例(ASM)¶
自动模式¶
# 自动模式:由编译器/运行时负责资源放置与调度。
%c_out = pto.tmatmul.acc %c_in, %a, %b : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>
手动模式¶
# 手动模式:先显式绑定资源,再发射指令。
# 可选(当该指令包含 tile 操作数时):
# pto.tassign %arg0, @tile(0x1000)
# pto.tassign %arg1, @tile(0x2000)
%c_out = pto.tmatmul.acc %c_in, %a, %b : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>
PTO 汇编形式¶
%acc1 = tmatmul.acc %acc0, %a, %b : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>
# AS Level 2 (DPS)
pto.tmatmul.acc ins(%c_in, %a, %b : !pto.tile_buf<...>, !pto.tile_buf<...>, !pto.tile_buf<...>) outs(%c_out : !pto.tile_buf<...>)