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TheNextSteveJobs merged 8 commits into from
Sep 19, 2025
Merged

StoreUnit docs update #177

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StoreUnit & template
TheNextSteveJobs Sep 19, 2025
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StoreUnit docs update
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Merge branch 'main' into main
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StoreUnit update
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Merge branch 'main' into main
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Update 01_storeunit.md
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54 changes: 49 additions & 5 deletions documents/content/zh-cn/docs/98_ut/03_memblock/03_lsu/01_storeunit.md
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Expand Up @@ -28,7 +28,16 @@ StoreUnit 是存储指令执行单元 ，由多个协同工作的子模块组成

#### 存储地址流水线

![Scalar](scalar.png)
<div>
<center>
<img src="../scalar.png"
alt="sw指令流水示意图"
style="zoom:100%"/>
<br>
图1：LoadQueueRAR结构示意图<br><br>
</center>
</div>


由4级结构组成：

Expand Down Expand Up @@ -84,7 +93,16 @@ StoreUnit 是存储指令执行单元 ，由多个协同工作的子模块组成
对于除 SEG指令外的向量内存访问指令，VSSplit 负责接收向量内存访问指令发射队列发送的微操作（uop），并将该微操作拆分为多个元素。随后VSSplit 将这些元素发送至StoreUnit 执行，执行流程与标量内存访问指令相同。执行完成后，元素会被写回至 VSMerge，其中 Merge 模块会将这些元素收集并组合成微操作，最终写回向量寄存器文件。
SEG 指令则由独立的 VSegmentUnit 模块处理。

![Vector](vector.png)
<div>
<center>
<img src="../vector.png"
alt="vse指令流水示意图"
style="zoom:100%"/>
<br>
图2：LoadQueueRAR结构示意图<br><br>
</center>
</div>


StoreUnit处理非对齐Store指令流程和标量类似，特别的:

Expand Down Expand Up @@ -118,7 +136,16 @@ StoreUnit处理非对齐Store指令流程和标量类似，特别的:

原子指令、MMIO与NC地址空间均不支持非对齐访问，这些情况将触发AccessFault异常。

![Misalign](misalign.png)
<div>
<center>
<img src="../misalign.png"
alt="非对齐sd指令流水示意图"
style="zoom:100%"/>
<br>
图3：非对齐sd指令流水示意图<br><br>
</center>
</div>


StoreUnit处理非对齐Store指令流程和标量类似，特别的:

Expand Down Expand Up @@ -147,7 +174,16 @@ RAW内存违例：处理器核执行的Load指令的结果应来源于当前处

Store指令地址流水线分为S0/S1/S2/S3四级,如图所示：

![StoreUnit整体框图](StoreUnit.png)
<div>
<center>
<img src="../StoreUnit.png"
alt="StoreUnit整体框图"
style="zoom:100%"/>
<br>
图4：StoreUnit整体框图<br><br>
</center>
</div>


接收store地址发射队列发来的请求，处理完成之后需要给后端和向量部分响应，处理过程中需要给发射队列反馈信息，给StoreQueue反馈信息，最后写回, 如果中间出现异常则从发射队列重新发射。

Expand Down Expand Up @@ -700,7 +736,15 @@ SBuffer支持超时清空机制；超过2^20周期未被换出的数据块将被

### 接口时序实例

![StoreUnit接口时序](LSU-StoreUnit-Timing.svg)
<div>
<center>
<img src="../LSU-StoreUnit-Timing.svg"
alt="StoreUnit接口时序"
style="zoom:100%"/>
<br>
图1：StoreUnit接口时序<br><br>
</center>
</div>



Expand Down