ma_acc.htm
来自「ST20 Embedded Toolset R2.0.5用于开发基于ST20芯片」· HTM 代码 · 共 88 行
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<a name="1205247"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">12 Accelerating performance</font>
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<a name="1205248"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The ST20-C2 provides several features for accelerating performance:</font>
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<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204401"> </a>memory pipelining,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204402"> </a>instruction grouping,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204403"> </a>the workspace cache.</font></p>
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<a name="1204404"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">These are purely micro-architectural mechanisms. Whether they are present or absent in any given version of the hardware, or variations in the implementation, only affects the performance of instructions and never the functionality. From the point of view of logical correctness of the code, a programmer can ignore them.</font>
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<a name="1204405"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Details of how these mechanisms are implemented vary between hardware versions, therefore the descriptions in this appendix should be taken as an example of one implementation. It is not guaranteed that all implementations have these properties.</font>
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