[Pnet-developers] [patch #3547] Libjit register overwrite for store element

[Evin Robertson]

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[patch #3547] Full Item Snapshot:

URL: <http://savannah.gnu.org/patch/?func=detailitem&item_id=3547>
Project: DotGNU Portable.NET
Submitted by: Evin Robertson
On: Fri 12/03/04 at 20:06

Category:  None
Priority:  5 - Normal
Resolution:  None
Privacy:  Public
Assigned to:  None
Originator Email:  
Status:  Open


Summary:  Libjit register overwrite for store element

Original Submission:  Same problem as before with store relative overwriting 
the destination address with the value.  This time with store element.

The register allocater seems to get confused if either the destination or the 
value being written are constants.  Segmentation faults result.

To work around this, I check for immediates like you did before.  I added [imm, 
reg, imm] and [imm, reg, reg] and [reg, reg, imm] modes for the store element 
opcodes.

However, the gen-sel tool doesn't like multiple immediates (it will overwrite 
one with the other).  So I reworked it to take up to 8 registers, and 8 
immediates.  The names are reg1 to reg8 and imm_value1 to imm_value8.  A few 
places in the x86 sel file thus needed a 'reg' changed to a 'reg1'.

If you apply patch #3546 it will need its 'reg' changed to 'reg1' as well.




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File Attachments
-------------------

-------------------------------------------------------
Date: Fri 12/03/04 at 20:06  Name: jitreg.patch  Size: 8.3KB   By: evin
Multiple immediates for gen-sel and correction for store element
http://savannah.gnu.org/patch/download.php?item_id=3547&amp;item_file_id=3915






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<http://savannah.gnu.org/patch/?func=detailitem&item_id=3547>

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