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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/real.h')
-rw-r--r-- | gcc-4.2.1-5666.3/gcc/real.h | 428 |
1 files changed, 0 insertions, 428 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/real.h b/gcc-4.2.1-5666.3/gcc/real.h deleted file mode 100644 index 3eecb92fb..000000000 --- a/gcc-4.2.1-5666.3/gcc/real.h +++ /dev/null @@ -1,428 +0,0 @@ -/* Definitions of floating-point access for GNU compiler. - Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999, - 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. - - 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. - - 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. */ - -#ifndef GCC_REAL_H -#define GCC_REAL_H - -#include "machmode.h" - -/* An expanded form of the represented number. */ - -/* Enumerate the special cases of numbers that we encounter. */ -enum real_value_class { - rvc_zero, - rvc_normal, - rvc_inf, - rvc_nan -}; - -#define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG) -#define EXP_BITS (32 - 6) -#define MAX_EXP ((1 << (EXP_BITS - 1)) - 1) -#define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG) -#define SIG_MSB ((unsigned long)1 << (HOST_BITS_PER_LONG - 1)) - -struct real_value GTY(()) -{ - /* Use the same underlying type for all bit-fields, so as to make - sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will - be miscomputed. */ - unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2; - unsigned int decimal : 1; - unsigned int sign : 1; - unsigned int signalling : 1; - unsigned int canonical : 1; - unsigned int uexp : EXP_BITS; - unsigned long sig[SIGSZ]; -}; - -#define REAL_EXP(REAL) \ - ((int)((REAL)->uexp ^ (unsigned int)(1 << (EXP_BITS - 1))) \ - - (1 << (EXP_BITS - 1))) -#define SET_REAL_EXP(REAL, EXP) \ - ((REAL)->uexp = ((unsigned int)(EXP) & (unsigned int)((1 << EXP_BITS) - 1))) - -/* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it - needs to be a macro. We do need to continue to have a structure tag - so that other headers can forward declare it. */ -#define REAL_VALUE_TYPE struct real_value - -/* We store a REAL_VALUE_TYPE into an rtx, and we do this by putting it in - consecutive "w" slots. Moreover, we've got to compute the number of "w" - slots at preprocessor time, which means we can't use sizeof. Guess. */ - -#define REAL_VALUE_TYPE_SIZE (SIGNIFICAND_BITS + 32) -#define REAL_WIDTH \ - (REAL_VALUE_TYPE_SIZE/HOST_BITS_PER_WIDE_INT \ - + (REAL_VALUE_TYPE_SIZE%HOST_BITS_PER_WIDE_INT ? 1 : 0)) /* round up */ - -/* Verify the guess. */ -extern char test_real_width - [sizeof(REAL_VALUE_TYPE) <= REAL_WIDTH*sizeof(HOST_WIDE_INT) ? 1 : -1]; - -/* Calculate the format for CONST_DOUBLE. We need as many slots as - are necessary to overlay a REAL_VALUE_TYPE on them. This could be - as many as four (32-bit HOST_WIDE_INT, 128-bit REAL_VALUE_TYPE). - - A number of places assume that there are always at least two 'w' - slots in a CONST_DOUBLE, so we provide them even if one would suffice. */ - -#if REAL_WIDTH == 1 -# define CONST_DOUBLE_FORMAT "ww" -#else -# if REAL_WIDTH == 2 -# define CONST_DOUBLE_FORMAT "ww" -# else -# if REAL_WIDTH == 3 -# define CONST_DOUBLE_FORMAT "www" -# else -# if REAL_WIDTH == 4 -# define CONST_DOUBLE_FORMAT "wwww" -# else -# if REAL_WIDTH == 5 -# define CONST_DOUBLE_FORMAT "wwwww" -# else -# if REAL_WIDTH == 6 -# define CONST_DOUBLE_FORMAT "wwwwww" -# else - #error "REAL_WIDTH > 6 not supported" -# endif -# endif -# endif -# endif -# endif -#endif - - -/* Describes the properties of the specific target format in use. */ -struct real_format -{ - /* Move to and from the target bytes. */ - void (*encode) (const struct real_format *, long *, - const REAL_VALUE_TYPE *); - void (*decode) (const struct real_format *, REAL_VALUE_TYPE *, - const long *); - - /* The radix of the exponent and digits of the significand. */ - int b; - - /* log2(b). */ - int log2_b; - - /* Size of the significand in digits of radix B. */ - int p; - - /* Size of the significant of a NaN, in digits of radix B. */ - int pnan; - - /* The minimum negative integer, x, such that b**(x-1) is normalized. */ - int emin; - - /* The maximum integer, x, such that b**(x-1) is representable. */ - int emax; - - /* The bit position of the sign bit, for determining whether a value - is positive/negative, or -1 for a complex encoding. */ - int signbit_ro; - - /* The bit position of the sign bit, for changing the sign of a number, - or -1 for a complex encoding. */ - int signbit_rw; - - /* Properties of the format. */ - bool has_nans; - bool has_inf; - bool has_denorm; - bool has_signed_zero; - bool qnan_msb_set; -}; - - -/* The target format used for each floating point mode. - Float modes are followed by decimal float modes, with entries for - float modes indexed by (MODE - first float mode), and entries for - decimal float modes indexed by (MODE - first decimal float mode) + - the number of float modes. */ -extern const struct real_format * - real_format_for_mode[MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1 - + MAX_MODE_DECIMAL_FLOAT - MIN_MODE_DECIMAL_FLOAT + 1]; - -#define REAL_MODE_FORMAT(MODE) \ - (real_format_for_mode[DECIMAL_FLOAT_MODE_P (MODE) \ - ? ((MODE - MIN_MODE_DECIMAL_FLOAT) \ - + (MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1)) \ - : (MODE - MIN_MODE_FLOAT)]) - -/* The following macro determines whether the floating point format is - composite, i.e. may contain non-consecutive mantissa bits, in which - case compile-time FP overflow may not model run-time overflow. */ -#define REAL_MODE_FORMAT_COMPOSITE_P(MODE) \ - ((REAL_MODE_FORMAT(MODE))->pnan < (REAL_MODE_FORMAT (MODE))->p) - -/* Declare functions in real.c. */ - -/* Binary or unary arithmetic on tree_code. */ -extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *, - const REAL_VALUE_TYPE *); - -/* Compare reals by tree_code. */ -extern bool real_compare (int, const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); - -/* Determine whether a floating-point value X is infinite. */ -extern bool real_isinf (const REAL_VALUE_TYPE *); - -/* Determine whether a floating-point value X is a NaN. */ -extern bool real_isnan (const REAL_VALUE_TYPE *); - -/* Determine whether a floating-point value X is negative. */ -extern bool real_isneg (const REAL_VALUE_TYPE *); - -/* Determine whether a floating-point value X is minus zero. */ -extern bool real_isnegzero (const REAL_VALUE_TYPE *); - -/* Compare two floating-point objects for bitwise identity. */ -extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); - -/* Extend or truncate to a new mode. */ -extern void real_convert (REAL_VALUE_TYPE *, enum machine_mode, - const REAL_VALUE_TYPE *); - -/* Return true if truncating to NEW is exact. */ -extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *); - -/* Render R as a decimal floating point constant. */ -extern void real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t, - size_t, int); - -/* Render R as a hexadecimal floating point constant. */ -extern void real_to_hexadecimal (char *, const REAL_VALUE_TYPE *, - size_t, size_t, int); - -/* Render R as an integer. */ -extern HOST_WIDE_INT real_to_integer (const REAL_VALUE_TYPE *); -extern void real_to_integer2 (HOST_WIDE_INT *, HOST_WIDE_INT *, - const REAL_VALUE_TYPE *); - -/* Initialize R from a decimal or hexadecimal string. */ -extern void real_from_string (REAL_VALUE_TYPE *, const char *); -/* Wrapper to allow different internal representation for decimal floats. */ -extern void real_from_string3 (REAL_VALUE_TYPE *, const char *, enum machine_mode); - -/* Initialize R from an integer pair HIGH/LOW. */ -extern void real_from_integer (REAL_VALUE_TYPE *, enum machine_mode, - unsigned HOST_WIDE_INT, HOST_WIDE_INT, int); - -extern long real_to_target_fmt (long *, const REAL_VALUE_TYPE *, - const struct real_format *); -extern long real_to_target (long *, const REAL_VALUE_TYPE *, enum machine_mode); - -extern void real_from_target_fmt (REAL_VALUE_TYPE *, const long *, - const struct real_format *); -extern void real_from_target (REAL_VALUE_TYPE *, const long *, - enum machine_mode); - -extern void real_inf (REAL_VALUE_TYPE *); - -extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, enum machine_mode); - -extern void real_maxval (REAL_VALUE_TYPE *, int, enum machine_mode); - -extern void real_2expN (REAL_VALUE_TYPE *, int); - -extern unsigned int real_hash (const REAL_VALUE_TYPE *); - - -/* Target formats defined in real.c. */ -extern const struct real_format ieee_single_format; -extern const struct real_format mips_single_format; -extern const struct real_format ieee_double_format; -extern const struct real_format mips_double_format; -extern const struct real_format ieee_extended_motorola_format; -extern const struct real_format ieee_extended_intel_96_format; -extern const struct real_format ieee_extended_intel_96_round_53_format; -extern const struct real_format ieee_extended_intel_128_format; -extern const struct real_format ibm_extended_format; -extern const struct real_format mips_extended_format; -extern const struct real_format ieee_quad_format; -extern const struct real_format mips_quad_format; -extern const struct real_format vax_f_format; -extern const struct real_format vax_d_format; -extern const struct real_format vax_g_format; -extern const struct real_format i370_single_format; -extern const struct real_format i370_double_format; -extern const struct real_format c4x_single_format; -extern const struct real_format c4x_extended_format; -extern const struct real_format real_internal_format; -extern const struct real_format decimal_single_format; -extern const struct real_format decimal_double_format; -extern const struct real_format decimal_quad_format; - - -/* ====================================================================== */ -/* Crap. */ - -#define REAL_ARITHMETIC(value, code, d1, d2) \ - real_arithmetic (&(value), code, &(d1), &(d2)) - -#define REAL_VALUES_IDENTICAL(x, y) real_identical (&(x), &(y)) -#define REAL_VALUES_EQUAL(x, y) real_compare (EQ_EXPR, &(x), &(y)) -#define REAL_VALUES_LESS(x, y) real_compare (LT_EXPR, &(x), &(y)) - -/* Determine whether a floating-point value X is infinite. */ -#define REAL_VALUE_ISINF(x) real_isinf (&(x)) - -/* Determine whether a floating-point value X is a NaN. */ -#define REAL_VALUE_ISNAN(x) real_isnan (&(x)) - -/* Determine whether a floating-point value X is negative. */ -#define REAL_VALUE_NEGATIVE(x) real_isneg (&(x)) - -/* Determine whether a floating-point value X is minus zero. */ -#define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x)) - -/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ -#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \ - real_to_target (OUT, &(IN), \ - mode_for_size (LONG_DOUBLE_TYPE_SIZE, MODE_FLOAT, 0)) - -#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \ - real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0)) - -/* IN is a REAL_VALUE_TYPE. OUT is a long. */ -#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \ - ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_FLOAT, 0))) - -#define REAL_VALUE_FROM_INT(r, lo, hi, mode) \ - real_from_integer (&(r), mode, lo, hi, 0) - -#define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \ - real_from_integer (&(r), mode, lo, hi, 1) - -/* Real values to IEEE 754R decimal floats. */ - -/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ -#define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \ - real_to_target (OUT, &(IN), mode_for_size (128, MODE_DECIMAL_FLOAT, 0)) - -#define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \ - real_to_target (OUT, &(IN), mode_for_size (64, MODE_DECIMAL_FLOAT, 0)) - -/* IN is a REAL_VALUE_TYPE. OUT is a long. */ -#define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \ - ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_DECIMAL_FLOAT, 0))) - -extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode, - REAL_VALUE_TYPE); - -#define REAL_VALUE_TO_INT(plow, phigh, r) \ - real_to_integer2 (plow, phigh, &(r)) - -extern REAL_VALUE_TYPE real_arithmetic2 (int, const REAL_VALUE_TYPE *, - const REAL_VALUE_TYPE *); - -#define REAL_VALUE_NEGATE(X) \ - real_arithmetic2 (NEGATE_EXPR, &(X), NULL) - -#define REAL_VALUE_ABS(X) \ - real_arithmetic2 (ABS_EXPR, &(X), NULL) - -extern int significand_size (enum machine_mode); - -extern REAL_VALUE_TYPE real_from_string2 (const char *, enum machine_mode); - -#define REAL_VALUE_ATOF(s, m) \ - real_from_string2 (s, m) - -#define CONST_DOUBLE_ATOF(s, m) \ - CONST_DOUBLE_FROM_REAL_VALUE (real_from_string2 (s, m), m) - -#define REAL_VALUE_FIX(r) \ - real_to_integer (&(r)) - -/* ??? Not quite right. */ -#define REAL_VALUE_UNSIGNED_FIX(r) \ - real_to_integer (&(r)) - -/* ??? These were added for Paranoia support. */ - -/* Return floor log2(R). */ -extern int real_exponent (const REAL_VALUE_TYPE *); - -/* R = A * 2**EXP. */ -extern void real_ldexp (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int); - -/* **** End of software floating point emulator interface macros **** */ - -/* Constant real values 0, 1, 2, 3, 10, -1, -2, 0.5 and 1/3. */ - -extern REAL_VALUE_TYPE dconst0; -extern REAL_VALUE_TYPE dconst1; -extern REAL_VALUE_TYPE dconst2; -extern REAL_VALUE_TYPE dconst3; -extern REAL_VALUE_TYPE dconst10; -extern REAL_VALUE_TYPE dconstm1; -extern REAL_VALUE_TYPE dconstm2; -extern REAL_VALUE_TYPE dconsthalf; -extern REAL_VALUE_TYPE dconstthird; -extern REAL_VALUE_TYPE dconstpi; -extern REAL_VALUE_TYPE dconste; - -/* Function to return a real value (not a tree node) - from a given integer constant. */ -REAL_VALUE_TYPE real_value_from_int_cst (tree, tree); - -/* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */ -#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \ - ((to) = *CONST_DOUBLE_REAL_VALUE (from)) - -/* Return a CONST_DOUBLE with value R and mode M. */ -#define CONST_DOUBLE_FROM_REAL_VALUE(r, m) \ - const_double_from_real_value (r, m) -extern rtx const_double_from_real_value (REAL_VALUE_TYPE, enum machine_mode); - -/* Replace R by 1/R in the given machine mode, if the result is exact. */ -extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *); - -/* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */ -extern tree build_real (tree, REAL_VALUE_TYPE); - -/* Calculate R as the square root of X in the given machine mode. */ -extern bool real_sqrt (REAL_VALUE_TYPE *, enum machine_mode, - const REAL_VALUE_TYPE *); - -/* Calculate R as X raised to the integer exponent N in mode MODE. */ -extern bool real_powi (REAL_VALUE_TYPE *, enum machine_mode, - const REAL_VALUE_TYPE *, HOST_WIDE_INT); - -/* Standard round to integer value functions. */ -extern void real_trunc (REAL_VALUE_TYPE *, enum machine_mode, - const REAL_VALUE_TYPE *); -extern void real_floor (REAL_VALUE_TYPE *, enum machine_mode, - const REAL_VALUE_TYPE *); -extern void real_ceil (REAL_VALUE_TYPE *, enum machine_mode, - const REAL_VALUE_TYPE *); -extern void real_round (REAL_VALUE_TYPE *, enum machine_mode, - const REAL_VALUE_TYPE *); - -/* Set the sign of R to the sign of X. */ -extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); - -#endif /* ! GCC_REAL_H */ |