Date: Tue, 3 Apr 2007 21:31:15 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: src-committers@FreeBSD.org Cc: cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/lib/libc/amd64/stdlib Makefile.inc div.S ldiv.S lldiv.S Message-ID: <200704032131.17421.jkim@FreeBSD.org> In-Reply-To: <200704040119.l341JsQ1083798@repoman.freebsd.org> References: <200704040119.l341JsQ1083798@repoman.freebsd.org>
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On Tuesday 03 April 2007 09:19 pm, Jung-uk Kim wrote:
> jkim 2007-04-04 01:19:54 UTC
>
> FreeBSD src repository
>
> Added files:
> lib/libc/amd64/stdlib Makefile.inc div.S ldiv.S lldiv.S
> Log:
> Import amd64 assembly implementations of div(3) family from
> NetBSD.
>
> Obtained from: NetBSD
>
> Revision Changes Path
> 1.1 +4 -0 src/lib/libc/amd64/stdlib/Makefile.inc (new)
> 1.1 +17 -0 src/lib/libc/amd64/stdlib/div.S (new)
> 1.1 +15 -0 src/lib/libc/amd64/stdlib/ldiv.S (new)
> 1.1 +15 -0 src/lib/libc/amd64/stdlib/lldiv.S (new)
Here is some stats:
x div.c
+ div.S
+--------------------------------------------------------------------------+
| + x |
| + x |
| + x |
| + x |
| + x |
| + x |
| ++ + xx |
| ++ ++ x xx |
| ++ +++ x xx |
|+ +++ +++ x x xxxxx |
| |__AM_| |______A__M____||
+--------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 25 0.80913 0.842137 0.841493 0.83946676 0.0065767776
+ 25 0.782989 0.793462 0.792594 0.79126932 0.0025271281
Difference at 95.0% confidence
-0.0481974 +/- 0.00283374
-5.74144% +/- 0.337564%
(Student's t, pooled s = 0.00498199)
x ldiv.c
+ ldiv.S
+--------------------------------------------------------------------------+
| + |
| + |
| + + x |
| + + x xx |
| + + x xx |
| + ++ xx xx |
| + +++ xx xx |
|+ ++++++++ + x x xxxx x xxx |
| |__AM__| |_______MA________||
+--------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 25 1.262527 1.293172 1.288804 1.2891065 0.0060759831
+ 25 1.24652 1.259101 1.25342 1.2527828 0.0025334642
Difference at 95.0% confidence
-0.0363236 +/- 0.00264769
-2.81774% +/- 0.205389%
(Student's t, pooled s = 0.00465489)
Each run is total user time of 25M executions in a tight
loop on Athlon64 @2GHz.
FYI,
Jung-uk Kim
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