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inline-asm/9981: attempt to read 64 bit pentium timestamp failure
- From: jon at mast dot queensu dot ca
- To: gcc-gnats at gcc dot gnu dot org
- Date: 6 Mar 2003 15:32:34 -0000
- Subject: inline-asm/9981: attempt to read 64 bit pentium timestamp failure
- Reply-to: jon at mast dot queensu dot ca
>Number: 9981
>Category: inline-asm
>Synopsis: attempt to read 64 bit pentium timestamp failure
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Mar 06 15:36:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator: jon at mast dot queensu dot ca
>Release: gcc 3.2
>Organization:
>Environment:
>Description:
Inline assembly to read 64 bit pentium timer fails with
testrdtsc.c:7: can't find a register in class `AD_REGS' while reloading `asm'
under gcc 3.2 . The info seems to indicate =A constraint allows a 64 bit result.
>How-To-Repeat:
gcc -g -O6 -o testrdtsc testrdtsc.c
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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