X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;ds=sidebyside;f=gcc%2Freal.h;h=884a663c83f74021d510c357aff9dd9c352d26aa;hb=b2e463928ede96a7006774046a584c7ee703e778;hp=b7cf3bb2f04205f70c39c0eb3958b5577da6fa20;hpb=a47b9d7927305dd956767900ce235bffc4e9310d;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/real.h b/gcc/real.h index b7cf3bb2f04..884a663c83f 100644 --- a/gcc/real.h +++ b/gcc/real.h @@ -1,12 +1,12 @@ /* Definitions of floating-point access for GNU compiler. Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999, - 2000, 2002, 2003, 2004 Free Software Foundation, Inc. + 2000, 2002, 2003, 2004, 2005, 2007, 2008 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 + Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY @@ -15,13 +15,22 @@ 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, 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ + along with GCC; see the file COPYING3. If not see + . */ #ifndef GCC_REAL_H #define GCC_REAL_H +#ifndef GENERATOR_FILE +#include +#include +#ifdef HAVE_mpc +#include +# if MPC_VERSION >= MPC_VERSION_NUM(0,6,1) +# define HAVE_mpc_pow +# endif +#endif +#endif #include "machmode.h" /* An expanded form of the represented number. */ @@ -35,17 +44,17 @@ enum real_value_class { }; #define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG) -#define EXP_BITS (32 - 5) +#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(()) -{ +struct GTY(()) real_value { /* 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; @@ -123,9 +132,6 @@ struct real_format /* 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; @@ -138,8 +144,17 @@ struct real_format /* The maximum integer, x, such that b**(x-1) is representable. */ int emax; - /* The bit position of the sign bit, or -1 for a complex encoding. */ - int signbit; + /* 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; + + /* Default rounding mode for operations on this format. */ + bool round_towards_zero; + bool has_sign_dependent_rounding; /* Properties of the format. */ bool has_nans; @@ -147,15 +162,47 @@ struct real_format bool has_denorm; bool has_signed_zero; bool qnan_msb_set; + bool canonical_nan_lsbs_set; }; -/* The target format used for each floating floating point mode. - Indexed by MODE - QFmode. */ +/* 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]; + 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)]) + +#define FLOAT_MODE_FORMAT(MODE) \ + (REAL_MODE_FORMAT (SCALAR_FLOAT_MODE_P (MODE)? (MODE) \ + : GET_MODE_INNER (MODE))) + +/* 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 MODE_COMPOSITE_P(MODE) \ + (FLOAT_MODE_P (MODE) \ + && FLOAT_MODE_FORMAT (MODE)->pnan < FLOAT_MODE_FORMAT (MODE)->p) + +/* Accessor macros for format properties. */ +#define MODE_HAS_NANS(MODE) \ + (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_nans) +#define MODE_HAS_INFINITIES(MODE) \ + (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_inf) +#define MODE_HAS_SIGNED_ZEROS(MODE) \ + (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_signed_zero) +#define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \ + (FLOAT_MODE_P (MODE) \ + && FLOAT_MODE_FORMAT (MODE)->has_sign_dependent_rounding) -#define REAL_MODE_FORMAT(MODE) (real_format_for_mode[(MODE) - MIN_MODE_FLOAT]) /* Declare functions in real.c. */ @@ -172,6 +219,9 @@ 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 finite. */ +extern bool real_isfinite (const REAL_VALUE_TYPE *); + /* Determine whether a floating-point value X is negative. */ extern bool real_isneg (const REAL_VALUE_TYPE *); @@ -192,6 +242,11 @@ extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *); extern void real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t, size_t, int); +/* Render R as a decimal floating point constant, rounded so as to be + parsed back to the same value when interpreted in mode MODE. */ +extern void real_to_decimal_for_mode (char *, const REAL_VALUE_TYPE *, size_t, + size_t, int, enum machine_mode); + /* Render R as a hexadecimal floating point constant. */ extern void real_to_hexadecimal (char *, const REAL_VALUE_TYPE *, size_t, size_t, int); @@ -201,8 +256,11 @@ 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 *); +/* Initialize R from a decimal or hexadecimal string. Return -1 if + the value underflows, +1 if overflows, and 0 otherwise. */ +extern int 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, @@ -223,7 +281,7 @@ 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 void real_2expN (REAL_VALUE_TYPE *, int, enum machine_mode); extern unsigned int real_hash (const REAL_VALUE_TYPE *); @@ -231,8 +289,11 @@ 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 motorola_single_format; +extern const struct real_format spu_single_format; extern const struct real_format ieee_double_format; extern const struct real_format mips_double_format; +extern const struct real_format motorola_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; @@ -244,11 +305,12 @@ 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; +extern const struct real_format ieee_half_format; +extern const struct real_format arm_half_format; /* ====================================================================== */ @@ -291,6 +353,19 @@ extern const struct real_format real_internal_format; #define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \ real_from_integer (&(r), mode, lo, hi, 1) +/* Real values to IEEE 754 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); @@ -333,27 +408,34 @@ 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. */ +/* Constant real values 0, 1, 2, -1 and 0.5. */ 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; + +#define dconst_e() (*dconst_e_ptr ()) +#define dconst_third() (*dconst_third_ptr ()) +#define dconst_sqrt2() (*dconst_sqrt2_ptr ()) + +/* Function to return the real value special constant 'e'. */ +extern const REAL_VALUE_TYPE * dconst_e_ptr (void); + +/* Returns the special REAL_VALUE_TYPE corresponding to 1/3. */ +extern const REAL_VALUE_TYPE * dconst_third_ptr (void); + +/* Returns the special REAL_VALUE_TYPE corresponding to sqrt(2). */ +extern const REAL_VALUE_TYPE * dconst_sqrt2_ptr (void); /* 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); +REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree); /* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */ #define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \ - memcpy (&(to), &CONST_DOUBLE_LOW ((from)), sizeof (REAL_VALUE_TYPE)) + ((to) = *CONST_DOUBLE_REAL_VALUE (from)) /* Return a CONST_DOUBLE with value R and mode M. */ #define CONST_DOUBLE_FROM_REAL_VALUE(r, m) \ @@ -363,6 +445,11 @@ 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 *); +/* Return true if arithmetic on values in IMODE that were promoted + from values in TMODE is equivalent to direct arithmetic on values + in TMODE. */ +bool real_can_shorten_arithmetic (enum machine_mode, enum machine_mode); + /* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */ extern tree build_real (tree, REAL_VALUE_TYPE); @@ -387,4 +474,19 @@ extern void real_round (REAL_VALUE_TYPE *, enum machine_mode, /* Set the sign of R to the sign of X. */ extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); +#ifndef GENERATOR_FILE +/* Convert between MPFR and REAL_VALUE_TYPE. The caller is + responsible for initializing and clearing the MPFR parameter. */ + +extern void real_from_mpfr (REAL_VALUE_TYPE *, mpfr_srcptr, tree, mp_rnd_t); +extern void mpfr_from_real (mpfr_ptr, const REAL_VALUE_TYPE *, mp_rnd_t); +#endif + +/* Check whether the real constant value given is an integer. */ +extern bool real_isinteger (const REAL_VALUE_TYPE *c, enum machine_mode mode); + +/* Write into BUF the maximum representable finite floating-point + number, (1 - b**-p) * b**emax for a given FP format FMT as a hex + float string. BUF must be large enough to contain the result. */ +extern void get_max_float (const struct real_format *, char *, size_t); #endif /* ! GCC_REAL_H */