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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: ** ** pkcray.c.h ** ** FACILITY: ** ** IDL Stub Runtime Support ** ** ABSTRACT: ** ** This module contains code to extract information from an ** UNPACKED_REAL structure and to create a CRAY floating number ** 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 an ** UNPACKED_REAL structure and to create a CRAY floating number ** 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: ** ** options: a word of flags, see include files. ** ** output_value: a pointer to the input parameter. ** ** r: an UNPACKED_REAL structure. ** **-- */ if (r[U_R_FLAGS] & U_R_UNUSUAL) { if (r[U_R_FLAGS] & U_R_ZERO) if (r[U_R_FLAGS] & U_R_NEGATIVE) memcpy(output_value, CRAY_NEG_ZERO, 8); else memcpy(output_value, CRAY_POS_ZERO, 8); else if (r[U_R_FLAGS] & U_R_INFINITY) { if (r[U_R_FLAGS] & U_R_NEGATIVE) { memcpy(output_value, CRAY_NEG_INFINITY, 8); DCETHREAD_RAISE(dcethread_aritherr_e); /* Negative infinity */ } else { memcpy(output_value, CRAY_POS_INFINITY, 8); DCETHREAD_RAISE(dcethread_aritherr_e); /* Positive infinity */ } } else if (r[U_R_FLAGS] & U_R_INVALID) { memcpy(output_value, CRAY_INVALID, 8); DCETHREAD_RAISE(dcethread_aritherr_e); /* Invalid value */ } } else { round_bit_position = 48; #include "round.c.h" if (r[U_R_EXP] < (U_R_BIAS - 8192)) { /* Underflow */ if (r[U_R_FLAGS] & U_R_NEGATIVE) memcpy(output_value, CRAY_NEG_ZERO, 8); else memcpy(output_value, CRAY_POS_ZERO, 8); if (options & CVT_C_ERR_UNDERFLOW) { DCETHREAD_RAISE(dcethread_fltund_e); /* Underflow */ } } else if (r[U_R_EXP] > (U_R_BIAS + 8191)) { /* Overflow */ if (options & CVT_C_TRUNCATE) { if (r[U_R_FLAGS] & U_R_NEGATIVE) memcpy(output_value, CRAY_NEG_HUGE, 8); else memcpy(output_value, CRAY_POS_HUGE, 8); } else if ((options & CVT_C_ROUND_TO_POS) && (r[U_R_FLAGS] & U_R_NEGATIVE)) { memcpy(output_value, CRAY_NEG_HUGE, 8); } else if ((options & CVT_C_ROUND_TO_NEG) && !(r[U_R_FLAGS] & U_R_NEGATIVE)) { memcpy(output_value, CRAY_POS_HUGE, 8); } else { memcpy(output_value, CRAY_INVALID, 8); } DCETHREAD_RAISE(dcethread_fltovf_e); /* Overflow */ } else { /* Adjust bias of exponent */ r[U_R_EXP] -= (U_R_BIAS - 16384); /* Make room for exponent and sign bit */ r[2] >>= 16; r[2] |= (r[1] << 16); r[1] >>= 16; /* OR in exponent and sign bit */ r[1] |= (r[U_R_EXP] << 16); r[1] |= (r[U_R_FLAGS] << 31); /* Shuffle bytes to big endian format */ #if (NDR_LOCAL_INT_REP == ndr_c_int_big_endian) if (options & CVT_C_BIG_ENDIAN) { r[0] = r[1]; r[1] = r[2]; } else { r[0] = ((r[1] << 24) | (r[1] >> 24)); r[0] |= ((r[1] << 8) & 0x00FF0000L); r[0] |= ((r[1] >> 8) & 0x0000FF00L); r[1] = ((r[2] << 24) | (r[2] >> 24)); r[1] |= ((r[2] << 8) & 0x00FF0000L); r[1] |= ((r[2] >> 8) & 0x0000FF00L); } #else r[0] = ((r[1] << 24) | (r[1] >> 24)); r[0] |= ((r[1] << 8) & 0x00FF0000L); r[0] |= ((r[1] >> 8) & 0x0000FF00L); r[1] = ((r[2] << 24) | (r[2] >> 24)); r[1] |= ((r[2] << 8) & 0x00FF0000L); r[1] |= ((r[2] >> 8) & 0x0000FF00L); #endif memcpy(output_value, r, 8); } }