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Re: [PATCH] Rework sparc PIC macros so crt{i,n}.S can use them too.

From: David Miller <davem at davemloft dot net>
To: rth at twiddle dot net
Cc: libc-alpha at sourceware dot org
Date: Mon, 20 Feb 2012 13:28:20 -0500 (EST)
Subject: Re: [PATCH] Rework sparc PIC macros so crt{i,n}.S can use them too.
References: <20120218.014919.1544476353694557763.davem@davemloft.net><4F427F24.4020605@twiddle.net>

From: Richard Henderson <rth@twiddle.net>
Date: Mon, 20 Feb 2012 09:13:08 -0800

> On 02/17/12 22:49, David Miller wrote:
>> --- a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
>> +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
> ...
>> -0:	SETUP_PIC_REG(o2,g1)			\
>> +0:	SETUP_PIC_REG_LEAF(o2,g1)		\
> 
> No attempt to use RDPC for sparc64?

RDPC is insanely expensive, it flushes the entire pipeline and
then inserts a 9 cycle bubble.

References:
- [PATCH] Rework sparc PIC macros so crt{i,n}.S can use them too.
  - From: David Miller
- Re: [PATCH] Rework sparc PIC macros so crt{i,n}.S can use them too.
  - From: Richard Henderson

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