diff options
Diffstat (limited to 'lib/libc/amd64/gen/ldexp.c')
-rw-r--r-- | lib/libc/amd64/gen/ldexp.c | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/lib/libc/amd64/gen/ldexp.c b/lib/libc/amd64/gen/ldexp.c deleted file mode 100644 index 8b63f52..0000000 --- a/lib/libc/amd64/gen/ldexp.c +++ /dev/null @@ -1,74 +0,0 @@ -/*- - * 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); -} |