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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [gas/] [flonum-copy.c] - Rev 308
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/* flonum_copy.c - copy a flonum Copyright 1987, 1990, 1991, 1992, 1993, 2000, 2003, 2007 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. GAS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GAS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GAS; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include "as.h" void flonum_copy (FLONUM_TYPE *in, FLONUM_TYPE *out) { unsigned int in_length; /* 0 origin */ unsigned int out_length; /* 0 origin */ out->sign = in->sign; in_length = in->leader - in->low; if (in->leader < in->low) { out->leader = out->low - 1; /* 0.0 case */ } else { out_length = out->high - out->low; /* Assume no GAPS in packing of littlenums. I.e. sizeof(array) == sizeof(element) * number_of_elements. */ if (in_length <= out_length) { { /* For defensive programming, zero any high-order littlenums we don't need. This is destroying evidence and wasting time, so why bother??? */ if (in_length < out_length) { memset ((char *) (out->low + in_length + 1), '\0', out_length - in_length); } } memcpy ((void *) (out->low), (void *) (in->low), ((in_length + 1) * sizeof (LITTLENUM_TYPE))); out->exponent = in->exponent; out->leader = in->leader - in->low + out->low; } else { int shorten; /* 1-origin. Number of littlenums we drop. */ shorten = in_length - out_length; /* Assume out_length >= 0 ! */ memcpy ((void *) (out->low), (void *) (in->low + shorten), ((out_length + 1) * sizeof (LITTLENUM_TYPE))); out->leader = out->high; out->exponent = in->exponent + shorten; } } /* if any significant bits */ }
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