projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| 252b5132 RH |
1 | /* flonum_copy.c - copy a flonum |
| 2 | Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of GAS, the GNU Assembler. | |
| 5 | ||
| 6 | GAS is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 2, or (at your option) | |
| 9 | any later version. | |
| 10 | ||
| 11 | GAS is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with GAS; see the file COPYING. If not, write to | |
| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
| 19 | ||
| 20 | #include "as.h" | |
| 21 | ||
| 22 | void | |
| 23 | flonum_copy (in, out) | |
| 24 | FLONUM_TYPE *in; | |
| 25 | FLONUM_TYPE *out; | |
| 26 | { | |
| 27 | unsigned int in_length; /* 0 origin */ | |
| 28 | unsigned int out_length; /* 0 origin */ | |
| 29 | ||
| 30 | out->sign = in->sign; | |
| 31 | in_length = in->leader - in->low; | |
| 32 | ||
| 33 | if (in->leader < in->low) | |
| 34 | { | |
| 35 | out->leader = out->low - 1; /* 0.0 case */ | |
| 36 | } | |
| 37 | else | |
| 38 | { | |
| 39 | out_length = out->high - out->low; | |
| 40 | /* | |
| 41 | * Assume no GAPS in packing of littlenums. | |
| 42 | * I.e. sizeof(array) == sizeof(element) * number_of_elements. | |
| 43 | */ | |
| 44 | if (in_length <= out_length) | |
| 45 | { | |
| 46 | { | |
| 47 | /* | |
| 48 | * For defensive programming, zero any high-order littlenums we don't need. | |
| 49 | * This is destroying evidence and wasting time, so why bother??? | |
| 50 | */ | |
| 51 | if (in_length < out_length) | |
| 52 | { | |
| 53 | memset ((char *) (out->low + in_length + 1), '\0', out_length - in_length); | |
| 54 | } | |
| 55 | } | |
| 56 | memcpy ((void *) (out->low), (void *) (in->low), ((in_length + 1) * sizeof (LITTLENUM_TYPE))); | |
| 57 | out->exponent = in->exponent; | |
| 58 | out->leader = in->leader - in->low + out->low; | |
| 59 | } | |
| 60 | else | |
| 61 | { | |
| 62 | int shorten; /* 1-origin. Number of littlenums we drop. */ | |
| 63 | ||
| 64 | shorten = in_length - out_length; | |
| 65 | /* Assume out_length >= 0 ! */ | |
| 66 | memcpy ((void *) (out->low), (void *) (in->low + shorten), ((out_length + 1) * sizeof (LITTLENUM_TYPE))); | |
| 67 | out->leader = out->high; | |
| 68 | out->exponent = in->exponent + shorten; | |
| 69 | } | |
| 70 | } /* if any significant bits */ | |
| 71 | } /* flonum_copy() */ | |
| 72 | ||
| 73 | /* end of flonum_copy.c */ |