| /* flonum_copy.c - copy a flonum |
| Copyright (C) 1987-2016 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 */ |
| } |