projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| fecd2382 RP |
1 | /* flonum_copy.c - copy a flonum |
| 2 | Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc. | |
| a39116f1 RP |
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, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| fecd2382 RP |
19 | |
| 20 | #include "as.h" | |
| 21 | ||
| 22 | #ifdef USG | |
| 23 | #define bzero(s,n) memset(s,0,n) | |
| 24 | #define bcopy(from,to,n) memcpy(to,from,n) | |
| 25 | #endif | |
| 26 | ||
| 27 | void | |
| a39116f1 RP |
28 | flonum_copy (in, out) |
| 29 | FLONUM_TYPE * in; | |
| 30 | FLONUM_TYPE * out; | |
| fecd2382 | 31 | { |
| a39116f1 RP |
32 | int in_length; /* 0 origin */ |
| 33 | int out_length; /* 0 origin */ | |
| 34 | ||
| 35 | out -> sign = in -> sign; | |
| 36 | in_length = in -> leader - in -> low; | |
| 37 | if (in_length < 0) | |
| 38 | { | |
| 39 | out -> leader = out -> low - 1; /* 0.0 case */ | |
| 40 | } | |
| 41 | else | |
| 42 | { | |
| 43 | out_length = out -> high - out -> low; | |
| 44 | /* | |
| 45 | * Assume no GAPS in packing of littlenums. | |
| 46 | * I.e. sizeof(array) == sizeof(element) * number_of_elements. | |
| 47 | */ | |
| 48 | if (in_length <= out_length) | |
| 49 | { | |
| 50 | { | |
| 51 | /* | |
| 52 | * For defensive programming, zero any high-order littlenums we don't need. | |
| 53 | * This is destroying evidence and wasting time, so why bother??? | |
| 54 | */ | |
| 55 | if (in_length < out_length) | |
| 56 | { | |
| 57 | bzero ((char *)(out->low + in_length + 1), out_length - in_length); | |
| 58 | } | |
| 59 | } | |
| 60 | bcopy ((char *)(in->low), (char *)(out->low), (int)((in_length + 1) * sizeof(LITTLENUM_TYPE))); | |
| 61 | out -> exponent = in -> exponent; | |
| 62 | out -> leader = in -> leader - in -> low + out -> low; | |
| 63 | } | |
| 64 | else | |
| 65 | { | |
| 66 | int shorten; /* 1-origin. Number of littlenums we drop. */ | |
| 67 | ||
| 68 | shorten = in_length - out_length; | |
| 69 | /* Assume out_length >= 0 ! */ | |
| 70 | bcopy ((char *)(in->low + shorten),(char *)( out->low), (int)((out_length + 1) * sizeof(LITTLENUM_TYPE))); | |
| 71 | out -> leader = out -> high; | |
| 72 | out -> exponent = in -> exponent + shorten; | |
| 73 | } | |
| 74 | } /* if any significant bits */ | |
| fecd2382 RP |
75 | } |
| 76 | ||
| 8b228fe9 | 77 | /* end of flonum_copy.c */ |