Re: inline-asm/9981: attempt to read 64 bit pentium timestamp failure

Re: inline-asm/9981: attempt to read 64 bit pentium timestamp failure

[Dara Hazeghi]

The following reply was made to PR inline-asm/9981; it has been noted by GNATS.

From: Dara Hazeghi <dhazeghi@yahoo.com>
To: gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: inline-asm/9981: attempt to read 64 bit pentium timestamp failure
Date: Sat, 10 May 2003 13:56:10 -0700

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit- 
 trail&database=gcc&pr=9981
 
 Still present on 3.3 branch and mainline (20030509).
 
 Dara
 

inline-asm/9981: attempt to read 64 bit pentium timestamp failure

[jon]

>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@mast.queensu.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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