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Neither Open Software * Foundation, Inc., Hewlett-Packard Company nor Digital * Equipment Corporation makes any representations about the suitability * of this software for any purpose. * * Copyright (c) 2007, Novell, Inc. All rights reserved. * 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. Neither the name of Novell Inc. nor the names of its contributors * may be used to endorse or promote products derived from this * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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. * * @APPLE_LICENSE_HEADER_END@ */ /* ** ** NAME: ** ** upkcray.c.h ** ** FACILITY: ** ** IDL Stub Runtime Support ** ** ABSTRACT: ** ** This module contains code to extract information from a cray ** floating number and to initialize an UNPACKED_REAL structure ** with those bits. ** ** This module is meant to be used as an include file. ** ** VERSION: DCE 1.0 ** */ #if HAVE_CONFIG_H #include <config.h> #endif /* **++ ** Functional Description: ** ** This module contains code to extract information from a cray ** floating number and to initialize an UNPACKED_REAL structure ** with those bits. ** ** See the header files for a description of the UNPACKED_REAL ** structure. ** ** A normalized CRAY floating number looks like: ** ** [0]: Sign bit, 15 exp bits (bias 16384), 16 fraction bits ** [1]: 32 low order fraction bits ** ** 0.5 <= fraction < 1.0, MSB explicit ** Since CRAY has no hidden bits the MSB must always be set. ** ** Some of the CRAY exponent range is not used. ** Exponents < 0x2000 and >= 0x6000 are invalid. ** ** ** Implicit parameters: ** ** input_value: a pointer to the input parameter. ** ** r: an UNPACKED_REAL structure. ** ** i: a temporary integer variable. ** **-- */ memcpy(r, input_value, 8); /* Shuffle bytes to little endian format */ #if (NDR_LOCAL_INT_REP == ndr_c_int_big_endian) if (options & CVT_C_BIG_ENDIAN) { r[2] = r[1]; r[1] = r[0]; } else { r[2] = r[0]; r[1] = r[1]; } #else r[2] = ((r[1] << 24) | (r[1] >> 24)); r[2] |= ((r[1] << 8) & 0x00FF0000L); r[2] |= ((r[1] >> 8) & 0x0000FF00L); r[1] = ((r[0] << 24) | (r[0] >> 24)); r[1] |= ((r[0] << 8) & 0x00FF0000L); r[1] |= ((r[0] >> 8) & 0x0000FF00L); #endif /* Initialize FLAGS and perhaps set NEGATIVE bit */ r[U_R_FLAGS] = (r[1] >> 31); /* Clear sign bit */ r[1] &= 0x7FFFFFFFL; /* Extract CRAY biased exponent */ r[U_R_EXP] = r[1] >> 16; if ((r[1] == 0) && (r[2] == 0)) { r[U_R_FLAGS] |= U_R_ZERO; } else if ( (r[U_R_EXP] < 0x2000) || (r[U_R_EXP] >= 0x6000) || (!(r[1] & 0x00008000L)) ) { r[U_R_FLAGS] |= U_R_INVALID; } else { /* Adjust bias */ r[U_R_EXP] += (U_R_BIAS - 16384); /* Left justify fraction bits */ r[1] <<= 16; r[1] |= (r[2] >> 16); r[2] <<= 16; /* Clear uninitialized part of unpacked real */ r[3] = 0; r[4] = 0; }