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SPU

网络Synergistic Processor Unit; 聚氨酯防水涂料

SPU

SPU

SPU

Synergistic Processor Unit

...9 EC/BC 处理器、Cell 宽带引擎架构的 Synergistic Processor Unit（SPU），并且支持 SmartMIPS 等。

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1

spu_insert is used to put a scalar value into a specific element of a vector .

spu_insert 用来将一个标量值放入向量的某个特定元素中。

2

spu_rlmaskqw operates on the whole quadword at a time, but only up to 7 bits (it performs a modulus on count to put it in the proper range ).

spu_rlmaskqw 会对整个 4 字同时进行操作，不过最多只能移动 7 位（它会对 count 取模，从而将其放入正确的范围内）。

3

While it would be relatively easy to create a new GDB target for the SPU itself , most users need to debug interaction between PPE and SPE.

虽然为 SPU 自己创建一个新的 GDB 目标非常简单，但是大部分用户都需要对 PPE 和 SPE 之间的交互进行调试。

5

When the SPU needs to do any standard library calls like printf or exit , it has to call back to the main thread .

当 SPU 需要执行任何标准的库调用时，例如 printf 或 exit ，它都需要回调主线程。

6

The concurrent nature of the processing and data transfer is what gives two-stage pipelining its edge in SPE programming .

处理和数据传输的并发本质使两阶段的管道连接很适合 SPU 编程。

7

The two transmission steps do not involve the SPU at all, but only the MFC (which is part of the larger SPE).

两个传输步骤根本没有涉及 SPU ，只涉及 MFC （这是比较大的 SPE 的一部分）。

8

The main communication method of the SPU with other parts of the Cell processor is defined by a number of "channels . "

SPU 与 Cell 处理器的其他部件之间的主要通信方法由许多 “通道 ”来定义。

10

It has three mailbox registers for each SPU, and each of those accesses one of the three SPU mailbox channels .

每个 SPU 具有三个邮箱寄存器，每个都可以访问这三个 SPU 邮箱通道。

11

Both of these can be easily avoided by careful selection of SPU intrinsics and good data structure design .

通过仔细选择 SPUintrinsic 和良好的数据结构设计，可以轻松地避免分支。

13

In this program , since the problem is trivially parallelizable, you can actually have as many buffers as the SPU's local store can support .

在这个程序中，因为问题在于可并行性很一般，所以实际上可以使用 SPU 的本地存储能够支持的任意数量的缓冲区。

14

The suction tray SPU used for sucking the work pieces with the lubricity appearance .

吸盘 SPU 用于吸取光滑表面的工件。

16

Since the SPU instruction set is not directly related to an existing CPU architecture , a new back end was written for both GCC and binutils.

由于 SPU 指令集并不与现有的 CPU 架构直接相关，因此我们为 GCC 和 binutils 编写了一个新的后端程序。

17

It turns out that several SPU instructions deal with only one of the register 's values .

几个 SPU 指令只能处理这些寄存器值中的一个。

18

The SPU has no real hardware support for branch hinting .

SPU 对于分支提示并没有没有实际硬件支持。

20

The SPU actually loads two instructions at a time from a doubleword-aligned boundary .

SPU 实际上会从一个双字对齐的边界开始一次加载两条指令。

21

In the code written so far , the SPU has simply waited for the MFC to finish before processing anything else .

在目前编写的代码中，SPU 仅仅等待 MFC 完成传输，然后才能处理其他东西。

22

To call a function according to the SPU ABI, all you need to do is put the parameters into registers , and then call brsl $lr, function_name.

要根据 SPUABI 调用函数，所需做的是将参数放入寄存器，然后调用 brsl$lr，function_name 。

24

The SPU is built to deal with data in batches, so moving to a buffer-at-a-time model will make the enhancements easier .

SPU 的设计就是用来批量处理数据，因此转到 “一次处理一个缓冲区 ”的模型可以简化这种改进。

26

mbox and ibox are used to read data written to the SPU mailbox write channels and have slightly different semantics .

mbox 和 ibox 用来读取那些被写入 SPU 邮箱写通道的数据，不过语义稍有不同。

27

28

This is critical , as the SPU can only load exactly 16 bytes at a time , aligned to exactly a 16-byte boundary .

这十分关键，因为 SPU 一次只能加载 16 字节，并对齐到 16 字节的边界。

29

spu_splats works like spu_promote, except that it copies the value to all elements of the vector .

spu_splats 的工作方式类似于 spu_promote ，除了它要将值拷贝到向量的所有元素中。

30

SPU processes can be scheduled by the kernel , and all users can create them without interfering with each other.

SPU 处理器可以由内核进行调度，所有的用户不用彼此进行交互就可以直接创建它们。

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