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[avr-libc-dev] [patch #6649] sqrt.s in libm changes

From: Ruud
Subject: [avr-libc-dev] [patch #6649] sqrt.s in libm changes
Date: Mon, 13 Oct 2008 06:42:10 +0000
User-agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; .NET CLR 2.0.50727; Media Center PC 4.0; InfoPath.2)


                 Summary: sqrt.s in libm changes
                 Project: AVR C Runtime Library
            Submitted by: ruud62
            Submitted on: Mon Oct 13 06:42:08 2008
                Category: None
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any



I have attached a new sqrt.s file which I propose for libm. Tested for all 23
bits mantissa, for both odd and even exponent.

Statistics relative to version 1.8 if __Optimizesize__ defined:
17 code words shorter, 120-244 cycles faster (average 169)

Statistics relative to version 1.8 if __Optimizesize__ not defined:
12 code words shorter, 184-294 cycles faster (average 231)



File Attachments:

Date: Mon Oct 13 06:42:08 2008  Name: sqrt.S  Size: 5kB   By: ruud62



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