/* IEEE floating point support declarations, for GDB, the GNU Debugger.   Copyright (C) 1991-2026 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 2 of the License, or(at your option) any later version. This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See theGNU General Public License for more details. You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */ #if !defined (FLOATFORMAT_H)#define FLOATFORMAT_H 1 #include "ansidecl.h" #ifdef __cplusplusextern "C" {#endif /* A floatformat consists of a sign bit, an exponent and a mantissa.  Once the   bytes are concatenated according to the byteorder flag, then each of those   fields is contiguous.  We number the bits with 0 being the most significant   (i.e. BITS_BIG_ENDIAN type numbering), and specify which bits each field   contains with the *_start and *_len fields.  */ /* What is the order of the bytes?  */ enum floatformat_byteorders {  /* Standard little endian byte order.     EX: 1.2345678e10 => 00 00 80 c5 e0 fe 06 42 */  floatformat_little,   /* Standard big endian byte order.     EX: 1.2345678e10 => 42 06 fe e0 c5 80 00 00 */  floatformat_big,   /* Little endian byte order but big endian word order.     EX: 1.2345678e10 => e0 fe 06 42 00 00 80 c5 */  floatformat_littlebyte_bigword,   /* VAX byte order.  Little endian byte order with 16-bit words.  The     following example is an illustration of the byte order only; VAX     doesn't have a fully IEEE compliant floating-point format.     EX: 1.2345678e10 => 80 c5 00 00 06 42 e0 fe */  floatformat_vax}; enum floatformat_intbit { floatformat_intbit_yes, floatformat_intbit_no }; struct floatformat{  enum floatformat_byteorders byteorder;  unsigned int totalsize;	/* Total size of number in bits */   /* Sign bit is always one bit long.  1 means negative, 0 means positive.  */  unsigned int sign_start;   unsigned int exp_start;  unsigned int exp_len;  /* Bias added to a "true" exponent to form the biased exponent.  It     is intentionally signed as, otherwize, -exp_bias can turn into a     very large number (e.g., given the exp_bias of 0x3fff and a 64     bit long, the equation (long)(1 - exp_bias) evaluates to     4294950914) instead of -16382).  */  int exp_bias;  /* Exponent value which indicates NaN.  This is the actual value stored in     the float, not adjusted by the exp_bias.  This usually consists of all     one bits.  */  unsigned int exp_nan;   unsigned int man_start;  unsigned int man_len;   /* Is the integer bit explicit or implicit?  */  enum floatformat_intbit intbit;   /* Internal name for debugging. */  const char *name;   /* Validator method.  */  int (*is_valid) (const struct floatformat *fmt, const void *from);   /* Is the format actually the sum of two smaller floating point     formats (IBM long double, as described in     libgcc/config/rs6000/ibm-ldouble-format)?  If so, this is the     smaller format in question, and the fields sign_start through     intbit describe the first half.  If not, this is NULL.  */  const struct floatformat *split_half;}; /* floatformats for IEEE half, single, double and quad, big and little endian.  */ extern const struct floatformat floatformat_ieee_half_big;extern const struct floatformat floatformat_ieee_half_little;extern const struct floatformat floatformat_ieee_single_big;extern const struct floatformat floatformat_ieee_single_little;extern const struct floatformat floatformat_ieee_double_big;extern const struct floatformat floatformat_ieee_double_little;extern const struct floatformat floatformat_ieee_quad_big;extern const struct floatformat floatformat_ieee_quad_little; /* floatformat for ARM IEEE double, little endian bytes and big endian words */ extern const struct floatformat floatformat_ieee_double_littlebyte_bigword; /* floatformats for VAX.  */ extern const struct floatformat floatformat_vax_f;extern const struct floatformat floatformat_vax_d;extern const struct floatformat floatformat_vax_g; /* floatformats for various extendeds.  */ extern const struct floatformat floatformat_i387_ext;extern const struct floatformat floatformat_m68881_ext;extern const struct floatformat floatformat_i960_ext;extern const struct floatformat floatformat_m88110_ext;extern const struct floatformat floatformat_m88110_harris_ext;extern const struct floatformat floatformat_arm_ext_big;extern const struct floatformat floatformat_arm_ext_littlebyte_bigword;/* IA-64 Floating Point register spilt into memory.  */extern const struct floatformat floatformat_ia64_spill_big;extern const struct floatformat floatformat_ia64_spill_little;/* IBM long double (double+double).  */extern const struct floatformat floatformat_ibm_long_double_big;extern const struct floatformat floatformat_ibm_long_double_little;/* bfloat16.  */extern const struct floatformat floatformat_bfloat16_big;extern const struct floatformat floatformat_bfloat16_little; /* Convert from FMT to a double.   FROM is the address of the extended float.   Store the double in *TO.  */ extern voidfloatformat_to_double (const struct floatformat *, const void *, double *); /* The converse: convert the double *FROM to FMT   and store where TO points.  */ extern voidfloatformat_from_double (const struct floatformat *, const double *, void *); /* Return non-zero iff the data at FROM is a valid number in format FMT.  */ extern intfloatformat_is_valid (const struct floatformat *fmt, const void *from); #ifdef __cplusplus}#endif #endif	/* defined (FLOATFORMAT_H) */