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-rw-r--r--lib/libc/amd64/gen/ldexp.c74
1 files changed, 0 insertions, 74 deletions
diff --git a/lib/libc/amd64/gen/ldexp.c b/lib/libc/amd64/gen/ldexp.c
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index 8b63f52..0000000
--- a/lib/libc/amd64/gen/ldexp.c
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-/*-
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Sean Eric Fagan.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $Id$
- */
-
-#if defined(LIBC_RCS) && !defined(lint)
-static const char rcsid[] = "$Id$";
-#endif /* LIBC_RCS and not lint */
-
-/*
- * ldexp(value, exp): return value * (2 ** exp).
- *
- * Written by Sean Eric Fagan (sef@kithrup.COM)
- * Sun Mar 11 20:27:09 PST 1990
- */
-
-/*
- * We do the conversion in C to let gcc optimize it away, if possible.
- * The "fxch ; fstp" stuff is because value is still on the stack
- * (stupid 8087!).
- */
-double
-ldexp (double value, int exp)
-{
- double temp, texp, temp2;
- texp = exp;
-#ifdef __GNUC__
-#if __GNUC__ >= 2
- asm ("fscale "
- : "=u" (temp2), "=t" (temp)
- : "0" (texp), "1" (value));
-#else
- asm ("fscale ; fxch %%st(1) ; fstp%L1 %1 "
- : "=f" (temp), "=0" (temp2)
- : "0" (texp), "f" (value));
-#endif
-#else
-error unknown asm
-#endif
- return (temp);
-}
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