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Re: [RFC][PATCH 02/31] locking,alpha: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}()

From Richard Henderson <rth@twiddle.net>
Newsgroups linux.kernel
Subject Re: [RFC][PATCH 02/31] locking,alpha: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}()
Date 2016-04-22 19:00 +0200
Message-ID <rqMAW-542-19@gated-at.bofh.it> (permalink)
References <rqFSN-8hs-3@gated-at.bofh.it> <rqG2u-8lR-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 04/22/2016 02:04 AM, Peter Zijlstra wrote:
> +	"1:	ldl_l %0,%1\n"						\
> +	"       mov %0,%2\n"						\
> +	"	" #asm_op " %0,%3,%0\n"					\
> +	"	stl_c %0,%1\n"						\

No need for the extra mov.

	ldl_l %2,%1
	asm_op %2,%3,%0
	stl_c %0,%1


r~

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[RFC][PATCH 02/31] locking,alpha: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}() Peter Zijlstra <peterz@infradead.org> - 2016-04-22 12:00 +0200
  Re: [RFC][PATCH 02/31] locking,alpha: Implement  atomic{,64}_fetch_{add,sub,and,andnot,or,xor}() Richard Henderson <rth@twiddle.net> - 2016-04-22 19:00 +0200
    Re: [RFC][PATCH 02/31] locking,alpha: Implement  atomic{,64}_fetch_{add,sub,and,andnot,or,xor}() Peter Zijlstra <peterz@infradead.org> - 2016-04-23 04:00 +0200

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