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Unnecessary multiple Register File write #894

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pascalgouedo opened this issue Oct 16, 2023 · 1 comment
Closed

Unnecessary multiple Register File write #894

pascalgouedo opened this issue Oct 16, 2023 · 1 comment
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Component:RTL For issues in the RTL (e.g. for files in the rtl directory) Status:Resolved Issue has been resolved, but closure is pending on git merge and/or issuer confirmation Type:Enhancement For feature requests and enhancements

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@pascalgouedo
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Issue description

For some instructions (MULH, DIV) and depending of stalling cases for loads (aligned, misaligned, post-incr) , multiple Register File writes are done while not necessary.

Component

Component:RTL

Steps to Reproduce

makeuvmt SIMULATOR=vsim VSIM_USER_FLAGS=+fixed_data_gnt_stall=3 USER_RUN_FLAGS=+fixed_data_rvalid_stall=3 WAVES=YES TEST=power_issues_test test

MULH_multiple_RF_write

DIV_multiple_RF_write

LOAD_multiple_RF_write

LOAD_MISALIGNED_multiple_RF_write

LOAD_POST_INC_multiple_RF_write

LOAD_POST_INC_MISALIGNED_multiple_RF_write
@pascalgouedo pascalgouedo added Type:Enhancement For feature requests and enhancements Component:RTL For issues in the RTL (e.g. for files in the rtl directory) labels Oct 16, 2023
@MikeOpenHWGroup MikeOpenHWGroup mentioned this issue Oct 16, 2023
Merged
pascalgouedo pushed a commit to pascalgouedo/cv32e40p that referenced this issue Oct 25, 2023
Issue openhwgroup#894 correction
e03edda 
Signed-off-by: Pascal Gouedo <[email protected]>
pascalgouedo pushed a commit to pascalgouedo/cv32e40p that referenced this issue Nov 9, 2023
Issue openhwgroup#894 correction
e6c6355 
Signed-off-by: Pascal Gouedo <[email protected]>
@pascalgouedo pascalgouedo mentioned this issue Nov 9, 2023
Merged
@pascalgouedo
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Resolved with PR #904

pascalgouedo pushed a commit to pascalgouedo/cv32e40p that referenced this issue Nov 10, 2023
Remove openhwgroup#894 corrections for formal verification debug.
53336b7 
Signed-off-by: Pascal Gouedo <[email protected]>
pascalgouedo pushed a commit to pascalgouedo/cv32e40p that referenced this issue Nov 27, 2023
Remove openhwgroup#894 corrections for formal verification debug.
060962b 
Signed-off-by: Pascal Gouedo <[email protected]>
@pascalgouedo pascalgouedo added the Status:Resolved Issue has been resolved, but closure is pending on git merge and/or issuer confirmation label May 16, 2024
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Component:RTL For issues in the RTL (e.g. for files in the rtl directory) Status:Resolved Issue has been resolved, but closure is pending on git merge and/or issuer confirmation Type:Enhancement For feature requests and enhancements
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