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perf: load -> arithmetic chaining not working #217

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SharzyL opened this issue Apr 24, 2023 · 0 comments
Open

perf: load -> arithmetic chaining not working #217

SharzyL opened this issue Apr 24, 2023 · 0 comments
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SharzyL commented Apr 24, 2023

The following waveform shows the execution of the instructions

vle32.v v8, (a5)
vadd.vi v8, v8, 2
vse32.v v8, (a5)

image

Notice that timestick 770 is the moment that vle instruction commits. Adders only begin working after this moment. This phenomenon implies that instrcution chaining between these two instructions is not working.

Also note that vadd to vse chaining partially works. Roughly 15 clocks after adders begin working, store requests are sent via tilelink.
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