Bug 107936 - Mesa assembler code uses ENTER/LEAVE instructions for a performance hit.
Mesa assembler code uses ENTER/LEAVE instructions for a performance hit.
Status: CLOSED RAWHIDE
Product: Red Hat Raw Hide
Classification: Retired
Component: XFree86 (Show other bugs)
1.0
All Linux
medium Severity medium
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Assigned To: Mike A. Harris
David Lawrence
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Reported: 2003-10-24 14:16 EDT by Mike A. Harris
Modified: 2007-04-18 12:58 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2006-01-20 12:06:36 EST
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Description Mike A. Harris 2003-10-24 14:16:30 EDT
Mesa assembler code uses ENTER/LEAVE instructions which I noticed while
reviewing debugger output.  This incurs severe performance loss due to these
instructions being implemented in microcode according to Intel docs.

This should be optimized to remove ENTER/LEAVE and save/restore registers
manually, etc.

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