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Diffstat (limited to 'gcc-4.2.1-5666.3/libdecnumber/decContext.h')
| -rw-r--r-- | gcc-4.2.1-5666.3/libdecnumber/decContext.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/libdecnumber/decContext.h b/gcc-4.2.1-5666.3/libdecnumber/decContext.h new file mode 100644 index 000000000..5252b33d5 --- /dev/null +++ b/gcc-4.2.1-5666.3/libdecnumber/decContext.h @@ -0,0 +1,187 @@ +/* Decimal Context module header for the decNumber C Library + Copyright (C) 2005, 2006 Free Software Foundation, Inc. + Contributed by IBM Corporation. Author Mike Cowlishaw. + + This file is part of GCC. + + GCC 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. + + In addition to the permissions in the GNU General Public License, + the Free Software Foundation gives you unlimited permission to link + the compiled version of this file into combinations with other + programs, and to distribute those combinations without any + restriction coming from the use of this file. (The General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into a combine executable.) + + GCC 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 GCC; see the file COPYING. If not, write to the Free + Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301, USA. */ + +/* ------------------------------------------------------------------ */ +/* */ +/* Context must always be set correctly: */ +/* */ +/* digits -- must be in the range 1 through 999999999 */ +/* emax -- must be in the range 0 through 999999999 */ +/* emin -- must be in the range 0 through -999999999 */ +/* round -- must be one of the enumerated rounding modes */ +/* traps -- only defined bits may be set */ +/* status -- [any bits may be cleared, but not set, by user] */ +/* clamp -- must be either 0 or 1 */ +/* extended -- must be either 0 or 1 [present only if DECSUBSET] */ +/* */ +/* ------------------------------------------------------------------ */ + +#if !defined(DECCONTEXT) +#define DECCONTEXT +#define DECCNAME "decContext" /* Short name */ +#define DECCFULLNAME "Decimal Context Descriptor" /* Verbose name */ +#define DECCAUTHOR "Mike Cowlishaw" /* Who to blame */ + +#include "gstdint.h" /* C99 standard integers */ +#include <signal.h> /* for traps */ + + + /* Conditional code flag -- set this to 0 for best performance */ +#define DECSUBSET 0 /* 1 to enable subset arithmetic */ + + /* Context for operations, with associated constants */ +enum rounding +{ + DEC_ROUND_CEILING, /* round towards +infinity */ + DEC_ROUND_UP, /* round away from 0 */ + DEC_ROUND_HALF_UP, /* 0.5 rounds up */ + DEC_ROUND_HALF_EVEN, /* 0.5 rounds to nearest even */ + DEC_ROUND_HALF_DOWN, /* 0.5 rounds down */ + DEC_ROUND_DOWN, /* round towards 0 (truncate) */ + DEC_ROUND_FLOOR, /* round towards -infinity */ + DEC_ROUND_MAX /* enum must be less than this */ +}; + +typedef struct +{ + int32_t digits; /* working precision */ + int32_t emax; /* maximum positive exponent */ + int32_t emin; /* minimum negative exponent */ + enum rounding round; /* rounding mode */ + uint32_t traps; /* trap-enabler flags */ + uint32_t status; /* status flags */ + uint8_t clamp; /* flag: apply IEEE exponent clamp */ +#if DECSUBSET + uint8_t extended; /* flag: special-values allowed */ +#endif +} decContext; + + /* Maxima and Minima */ +#define DEC_MAX_DIGITS 999999999 +#define DEC_MIN_DIGITS 1 +#define DEC_MAX_EMAX 999999999 +#define DEC_MIN_EMAX 0 +#define DEC_MAX_EMIN 0 +#define DEC_MIN_EMIN -999999999 + + /* Trap-enabler and Status flags (exceptional conditions), and their names */ + /* Top byte is reserved for internal use */ +#define DEC_Conversion_syntax 0x00000001 +#define DEC_Division_by_zero 0x00000002 +#define DEC_Division_impossible 0x00000004 +#define DEC_Division_undefined 0x00000008 +#define DEC_Insufficient_storage 0x00000010 /* [used if malloc fails] */ +#define DEC_Inexact 0x00000020 +#define DEC_Invalid_context 0x00000040 +#define DEC_Invalid_operation 0x00000080 +#if DECSUBSET +#define DEC_Lost_digits 0x00000100 +#endif +#define DEC_Overflow 0x00000200 +#define DEC_Clamped 0x00000400 +#define DEC_Rounded 0x00000800 +#define DEC_Subnormal 0x00001000 +#define DEC_Underflow 0x00002000 + + /* IEEE 854 groupings for the flags */ + /* [DEC_Clamped, DEC_Lost_digits, DEC_Rounded, and DEC_Subnormal are */ + /* not in IEEE 854] */ +#define DEC_IEEE_854_Division_by_zero (DEC_Division_by_zero) +#if DECSUBSET +#define DEC_IEEE_854_Inexact (DEC_Inexact | DEC_Lost_digits) +#else +#define DEC_IEEE_854_Inexact (DEC_Inexact) +#endif +#define DEC_IEEE_854_Invalid_operation (DEC_Conversion_syntax | \ + DEC_Division_impossible | \ + DEC_Division_undefined | \ + DEC_Insufficient_storage | \ + DEC_Invalid_context | \ + DEC_Invalid_operation) +#define DEC_IEEE_854_Overflow (DEC_Overflow) +#define DEC_IEEE_854_Underflow (DEC_Underflow) + + /* flags which are normally errors (results are qNaN, infinite, or 0) */ +#define DEC_Errors (DEC_IEEE_854_Division_by_zero | \ + DEC_IEEE_854_Invalid_operation | \ + DEC_IEEE_854_Overflow | DEC_IEEE_854_Underflow) + /* flags which cause a result to become qNaN */ +#define DEC_NaNs DEC_IEEE_854_Invalid_operation + + /* flags which are normally for information only (have finite results) */ +#if DECSUBSET +#define DEC_Information (DEC_Clamped | DEC_Rounded | DEC_Inexact \ + | DEC_Lost_digits) +#else +#define DEC_Information (DEC_Clamped | DEC_Rounded | DEC_Inexact) +#endif + + /* name strings for the exceptional conditions */ + +#define DEC_Condition_CS "Conversion syntax" +#define DEC_Condition_DZ "Division by zero" +#define DEC_Condition_DI "Division impossible" +#define DEC_Condition_DU "Division undefined" +#define DEC_Condition_IE "Inexact" +#define DEC_Condition_IS "Insufficient storage" +#define DEC_Condition_IC "Invalid context" +#define DEC_Condition_IO "Invalid operation" +#if DECSUBSET +#define DEC_Condition_LD "Lost digits" +#endif +#define DEC_Condition_OV "Overflow" +#define DEC_Condition_PA "Clamped" +#define DEC_Condition_RO "Rounded" +#define DEC_Condition_SU "Subnormal" +#define DEC_Condition_UN "Underflow" +#define DEC_Condition_ZE "No status" +#define DEC_Condition_MU "Multiple status" +#define DEC_Condition_Length 21 /* length of the longest string, */ + /* including terminator */ + + /* Initialization descriptors, used by decContextDefault */ +#define DEC_INIT_BASE 0 +#define DEC_INIT_DECIMAL32 32 +#define DEC_INIT_DECIMAL64 64 +#define DEC_INIT_DECIMAL128 128 + + /* decContext routines */ +#ifdef IN_LIBGCC2 +#define decContextDefault __decContextDefault +#define decContextSetStatus __decContextSetStatus +#define decContextStatusToString __decContextStatusToString +#define decContextSetStatusFromString __decContextSetStatusFromString +#endif +decContext *decContextDefault (decContext *, int32_t); +decContext *decContextSetStatus (decContext *, uint32_t); +const char *decContextStatusToString (const decContext *); +decContext *decContextSetStatusFromString (decContext *, const char *); + +#endif |