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| Rev | Author | Line No. | Line |
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| 5222 | serge | 1 | /* flonum_copy.c - copy a flonum |
| 2 | Copyright 1987, 1990, 1991, 1992, 1993, 2000, 2003, 2005, 2007 |
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| 3 | Free Software Foundation, Inc. |
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| 4 | |||
| 5 | This file is part of GAS, the GNU Assembler. |
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| 6 | |||
| 7 | GAS is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 3, or (at your option) |
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| 10 | any later version. |
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| 11 | |||
| 12 | GAS is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |||
| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with GAS; see the file COPYING. If not, write to the Free |
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| 19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
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| 20 | 02110-1301, USA. */ |
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| 21 | |||
| 22 | #include "as.h" |
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| 23 | |||
| 24 | void |
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| 25 | flonum_copy (FLONUM_TYPE *in, FLONUM_TYPE *out) |
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| 26 | { |
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| 27 | unsigned int in_length; /* 0 origin */ |
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| 28 | unsigned int out_length; /* 0 origin */ |
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| 29 | |||
| 30 | out->sign = in->sign; |
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| 31 | in_length = in->leader - in->low; |
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| 32 | |||
| 33 | if (in->leader < in->low) |
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| 34 | { |
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| 35 | out->leader = out->low - 1; /* 0.0 case */ |
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| 36 | } |
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| 37 | else |
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| 38 | { |
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| 39 | out_length = out->high - out->low; |
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| 40 | /* Assume no GAPS in packing of littlenums. |
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| 41 | I.e. sizeof(array) == sizeof(element) * number_of_elements. */ |
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| 42 | if (in_length <= out_length) |
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| 43 | { |
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| 44 | { |
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| 45 | /* For defensive programming, zero any high-order |
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| 46 | littlenums we don't need. This is destroying evidence |
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| 47 | and wasting time, so why bother??? */ |
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| 48 | if (in_length < out_length) |
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| 49 | { |
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| 50 | memset ((char *) (out->low + in_length + 1), '\0', |
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| 51 | out_length - in_length); |
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| 52 | } |
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| 53 | } |
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| 54 | memcpy ((void *) (out->low), (void *) (in->low), |
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| 55 | ((in_length + 1) * sizeof (LITTLENUM_TYPE))); |
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| 56 | out->exponent = in->exponent; |
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| 57 | out->leader = in->leader - in->low + out->low; |
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| 58 | } |
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| 59 | else |
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| 60 | { |
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| 61 | int shorten; /* 1-origin. Number of littlenums we drop. */ |
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| 62 | |||
| 63 | shorten = in_length - out_length; |
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| 64 | /* Assume out_length >= 0 ! */ |
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| 65 | memcpy ((void *) (out->low), (void *) (in->low + shorten), |
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| 66 | ((out_length + 1) * sizeof (LITTLENUM_TYPE))); |
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| 67 | out->leader = out->high; |
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| 68 | out->exponent = in->exponent + shorten; |
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| 69 | } |
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| 70 | } /* if any significant bits */ |
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| 71 | } |