freebsd-src/lib/msun/i387/s_logbf.S

/*
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Public domain.
 */

#include <machine/asm.h>

__FBSDID("$FreeBSD$");
/* RCSID("$NetBSD: s_logbf.S,v 1.3 1995/05/09 00:15:12 jtc Exp $") */

ENTRY(logbf)
	flds	4(%esp)
	fxtract
	fstp	%st
	ret
END(logbf)
Import the subset of J.T. Conklin's single-precision x86-optimized math routines that appear to be (a) correct and (b) faster than their MI counterparts on my Pentium 4. Obtained from: NetBSD 2005-01-13 18:58:25 +00:00			`/*`
			`* Written by J.T. Conklin <jtc@netbsd.org>.`
			`* Public domain.`
			`*/`

			`#include <machine/asm.h>`

			`__FBSDID("$FreeBSD$");`
			`/* RCSID("$NetBSD: s_logbf.S,v 1.3 1995/05/09 00:15:12 jtc Exp $") */`

			`ENTRY(logbf)`
			`flds 4(%esp)`
			`fxtract`
			`fstp %st`
			`ret`
Use, in uncovered part, the END() macro in order to improve debugging. In this specific case, Valgrind won't get confused when analyzing such functions. Sponsored by: Sandvine Incorporated Tested by: emaste MFC: 3 days 2009-05-25 14:37:10 +00:00			`END(logbf)`