X-Git-Url: http://drtracing.org/?a=blobdiff_plain;ds=sidebyside;f=gas%2Fflonum.h;h=690ae122d0067d59c41c62ef890f94d248b701c7;hb=b19e0aeb53c77e0dbb2083c18dcb0a154db99d17;hp=570bd3acfd24defe8a2f06abd3ec6b0d45284c89;hpb=3a69b3aca678a3caf3ade7f9d42d18233b097ec6;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/flonum.h b/gas/flonum.h index 570bd3acfd..690ae122d0 100644 --- a/gas/flonum.h +++ b/gas/flonum.h @@ -1,122 +1,101 @@ /* flonum.h - Floating point package - Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc. + Copyright (C) 1987-2016 Free Software Foundation, Inc. -This file is part of GAS, the GNU Assembler. + 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 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. + 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. */ - -/* $Id$ */ + 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. */ /***********************************************************************\ -* * -* 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 + * * + * 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! * + * * + \***********************************************************************/ #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 '-' */ + */ +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 '-' */ }; 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__ +int atof_generic (char **address_of_string_pointer, + const char *string_of_decimal_marks, + const char *string_of_decimal_exponent_marks, + FLONUM_TYPE * address_of_generic_floating_point_number); -int atof_generic(char **address_of_string_pointer, - const char *string_of_decimal_marks, - const char *string_of_decimal_exponent_marks, - FLONUM_TYPE *address_of_generic_floating_point_number); - -void flonum_copy(FLONUM_TYPE *in, FLONUM_TYPE *out); -void flonum_multip(const FLONUM_TYPE *a, const FLONUM_TYPE *b, FLONUM_TYPE *product); - -#else /* __STDC__ */ - -int atof_generic(); -void flonum_copy(); -void flonum_multip(); - -#endif /* __STDC__ */ +void flonum_copy (FLONUM_TYPE * in, FLONUM_TYPE * out); +void flonum_multip (const FLONUM_TYPE * a, const FLONUM_TYPE * b, + FLONUM_TYPE * product); /***********************************************************************\ -* * -* Declare error codes. * -* * -\***********************************************************************/ + * * + * Declare error codes. * + * * + \***********************************************************************/ #define ERROR_EXPONENT_OVERFLOW (2) - -/* end: flonum.h */