diff options
Diffstat (limited to 'gas/flonum.h')
| -rw-r--r-- | gas/flonum.h | 128 |
1 files changed, 64 insertions, 64 deletions
diff --git a/gas/flonum.h b/gas/flonum.h index 570bd3a..45dcbae 100644 --- a/gas/flonum.h +++ b/gas/flonum.h @@ -1,36 +1,36 @@ /* flonum.h - Floating point package Copyright (C) 1987, 1990, 1991 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + 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 2, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* $Id$ */ /***********************************************************************\ -* * -* Arbitrary-precision floating point arithmetic. * -* * -* * -* Notation: a floating point number is expressed as * -* MANTISSA * (2 ** EXPONENT). * -* * -* If this offends more traditional mathematicians, then * -* please tell me your nomenclature for flonums! * -* * -\***********************************************************************/ + * * + * Arbitrary-precision floating point arithmetic. * + * * + * * + * Notation: a floating point number is expressed as * + * MANTISSA * (2 ** EXPONENT). * + * * + * If this offends more traditional mathematicians, then * + * please tell me your nomenclature for flonums! * + * * + \***********************************************************************/ #if !defined(__STDC__) && !defined(const) #define const /* empty */ #endif @@ -38,60 +38,60 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "bignum.h" /***********************************************************************\ -* * -* Variable precision floating point numbers. * -* * -* Exponent is the place value of the low littlenum. E.g.: * -* If 0: low points to the units littlenum. * -* If 1: low points to the LITTLENUM_RADIX littlenum. * -* If -1: low points to the 1/LITTLENUM_RADIX littlenum. * -* * -\***********************************************************************/ + * * + * Variable precision floating point numbers. * + * * + * Exponent is the place value of the low littlenum. E.g.: * + * If 0: low points to the units littlenum. * + * If 1: low points to the LITTLENUM_RADIX littlenum. * + * If -1: low points to the 1/LITTLENUM_RADIX littlenum. * + * * + \***********************************************************************/ /* JF: A sign value of 0 means we have been asked to assemble NaN A sign value of 'P' means we've been asked to assemble +Inf A sign value of 'N' means we've been asked to assemble -Inf - */ + */ struct FLONUM_STRUCT { - LITTLENUM_TYPE * low; /* low order littlenum of a bignum */ - LITTLENUM_TYPE * high; /* high order littlenum of a bignum */ - LITTLENUM_TYPE * leader; /* -> 1st non-zero littlenum */ - /* If flonum is 0.0, leader==low-1 */ - long exponent; /* base LITTLENUM_RADIX */ - char sign; /* '+' or '-' */ + LITTLENUM_TYPE * low; /* low order littlenum of a bignum */ + LITTLENUM_TYPE * high; /* high order littlenum of a bignum */ + LITTLENUM_TYPE * leader; /* -> 1st non-zero littlenum */ + /* If flonum is 0.0, leader==low-1 */ + long exponent; /* base LITTLENUM_RADIX */ + char sign; /* '+' or '-' */ }; typedef struct FLONUM_STRUCT FLONUM_TYPE; /***********************************************************************\ -* * -* Since we can (& do) meet with exponents like 10^5000, it * -* is silly to make a table of ~ 10,000 entries, one for each * -* power of 10. We keep a table where item [n] is a struct * -* FLONUM_FLOATING_POINT representing 10^(2^n). We then * -* multiply appropriate entries from this table to get any * -* particular power of 10. For the example of 10^5000, a table * -* of just 25 entries suffices: 10^(2^-12)...10^(2^+12). * -* * -\***********************************************************************/ + * * + * Since we can (& do) meet with exponents like 10^5000, it * + * is silly to make a table of ~ 10,000 entries, one for each * + * power of 10. We keep a table where item [n] is a struct * + * FLONUM_FLOATING_POINT representing 10^(2^n). We then * + * multiply appropriate entries from this table to get any * + * particular power of 10. For the example of 10^5000, a table * + * of just 25 entries suffices: 10^(2^-12)...10^(2^+12). * + * * + \***********************************************************************/ extern const FLONUM_TYPE flonum_positive_powers_of_ten[]; extern const FLONUM_TYPE flonum_negative_powers_of_ten[]; extern const int table_size_of_flonum_powers_of_ten; - /* Flonum_XXX_powers_of_ten[] table has */ - /* legal indices from 0 to */ - /* + this number inclusive. */ +/* Flonum_XXX_powers_of_ten[] table has */ +/* legal indices from 0 to */ +/* + this number inclusive. */ /***********************************************************************\ -* * -* Declare worker functions. * -* * -\***********************************************************************/ + * * + * Declare worker functions. * + * * + \***********************************************************************/ #ifdef __STDC__ @@ -112,10 +112,10 @@ void flonum_multip(); #endif /* __STDC__ */ /***********************************************************************\ -* * -* Declare error codes. * -* * -\***********************************************************************/ + * * + * Declare error codes. * + * * + \***********************************************************************/ #define ERROR_EXPONENT_OVERFLOW (2) |