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* optimization/10654: feature request: non-temporal store, 64-bit general purpose register
@ 2003-05-07 2:46 scott.duplichan
0 siblings, 0 replies; only message in thread
From: scott.duplichan @ 2003-05-07 2:46 UTC (permalink / raw)
To: gcc-gnats
>Number: 10654
>Category: optimization
>Synopsis: feature request: non-temporal store, 64-bit general purpose register
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: support
>Submitter-Id: net
>Arrival-Date: Wed May 07 02:46:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator: scott duplichan
>Release: unknown-1.0
>Organization:
>Environment:
all
>Description:
Please forgive me if this is not the place for a feature request.
Feature request: _mm_stream_si64
An intrinsic for non-temporal store of ordinary 64-bit data is needed. IA64, AMD64, and possible others support this natively.
This type of store can achieve a 2X or so performance gain.
>How-To-Repeat:
On a system that supports native 64-bit registers, try to do a non-temporal store without using assembly language.
>Fix:
Implement an intrinsic function that stores a 64-bit general purpose register using a non-temporal store.
>Release-Note:
>Audit-Trail:
>Unformatted:
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2003-05-07 2:46 optimization/10654: feature request: non-temporal store, 64-bit general purpose register scott.duplichan
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