/* * Copyright (c) 2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Written by J.T. Conklin <jtc@netbsd.org>. * Public domain. * Adapted for exp2 by Stephen C. Peters */ #include <machine/asm.h> #include "abi.h" #warning scp: edge case +-Inf ENTRY(exp2f) XMM_ONE_ARG_FLOAT_PROLOGUE flds ARG_FLOAT_ONE fld %st(0) frndint /* int(x) */ fsubr %st(0),%st(1) /* fract(x) */ fxch %st(1) f2xm1 /* 2^(fract(x)) - 1 */ fld1 faddp /* 2^(fract(x)) */ fscale /* 2^x */ fstp %st(1) XMM_FLOAT_EPILOGUE ret