From: Clemens Eisserer <linuxhippy@gmail.com>
To: gcc-help@gcc.gnu.org
Subject: Re: short pointers (32 bit) in 64 bit apps
Date: Wed, 19 May 2010 21:24:00 -0000 [thread overview]
Message-ID: <AANLkTilefXCFviI9UqJo5q8NLMa7fc5R30shshPzg1k9@mail.gmail.com> (raw)
In-Reply-To: <4BF421E0.9080009@parvan.net>
Hi,
> Is there support for "short" pointers in 64 bit applications? As struct members, these short pointers would save space, but when accessed, they would
> automatically be treated as 64 bit pointers into the "current" 4GB space (namely where the containing struct resides.)
Sun's JVM is able to do this, they even have two different cases for
<= 4GB heaps and <= 32GB heaps, and at least for "typical" java
applications the speedup is in the range of 10-25%,
- Clemens
next prev parent reply other threads:[~2010-05-19 18:34 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-17 9:51 Reza Roboubi
2010-05-18 14:45 ` Ian Lance Taylor
2010-05-19 5:58 ` Reza Roboubi
2010-05-19 8:27 ` Ian Lance Taylor
2010-05-19 8:55 ` Nicholas Sherlock
2010-05-19 9:24 ` Reza Roboubi
2010-05-19 9:46 ` Nicholas Sherlock
2010-05-19 18:34 ` Reza Roboubi
2010-05-19 21:24 ` Clemens Eisserer [this message]
2010-05-19 21:29 ` phi benard
2010-05-24 21:52 ` Clemens Eisserer
2010-05-20 3:16 ` Ian Lance Taylor
2010-05-20 11:36 ` Nicholas Sherlock
2010-05-19 9:50 ` Andrew Haley
2010-05-19 19:08 ` Reza Roboubi
2010-05-20 2:29 ` John S. Fine
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