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Re: gcc using clobbered register as input with inline assembly

To: gcc-bugs at gcc dot gnu dot org
Subject: Re: gcc using clobbered register as input with inline assembly
From: Timur Tabi <ttabi at interactivesi dot com>
Date: Mon, 26 Mar 2001 12:38:39 -0600
References: <RLtZHC.A.j9C.683v6@dinero.interactivesi.com> <RLtZHC.A.j9C.683v6@dinero.interactivesi.com> ; from ttabi@interactivesi.com on Mon, Mar 26, 2001 at 11:41:13AM -0600

** Reply to message from "Zack Weinberg" <zackw@stanford.edu> on Mon, 26 Mar
2001 10:20:21 -0800


> inline void
> BeginCpuTick(u64 *const pTime)
> {
>    register u64 xtime;
>    asm volatile ("rdtsc" : "=A" (xtime));
>    *pTime = xtime;
> }

Could I replace the above with:

inline void
BeginCpuTick(u64 *const pTime)
{
   register u64 xtime;
   asm volatile ("rdtsc" : "=A" (*ptime));
}


-- 
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com

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References:
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  - From: Timur Tabi
- Re: gcc using clobbered register as input with inline assembly
  - From: Zack Weinberg

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