Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998,
1999, 2000, 2002 Free Software Foundation, Inc.
-This file is part of GCC.
+ 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 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.
+ 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, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+ 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. */
#ifndef GCC_REAL_H
#define GCC_REAL_H
+#include "machmode.h"
+
+/* REAL_VALUE_TYPE is an array of the minimum number of HOST_WIDE_INTs
+ required to hold a 128-bit floating point type. This is true even
+ if the maximum precision floating point type on the target is smaller.
+
+ The extra 32 bits are for storing the mode of the float. Ideally
+ we'd keep this elsewhere, but that's too drastic a change all at once. */
+
+#define REAL_VALUE_TYPE_SIZE (128 + 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 */
+
+struct realvaluetype GTY(()) {
+ HOST_WIDE_INT r[REAL_WIDTH];
+};
+
+/* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it needs
+ to be a macro. realvaluetype cannot be a typedef as this interferes with
+ other headers declaring opaque pointers to it. */
+#define REAL_VALUE_TYPE struct realvaluetype
+
+/* 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
+ #error "REAL_WIDTH > 5 not supported"
+# endif
+# endif
+# endif
+# endif
+#endif
+
+/* Declare functions in real.c. */
+
+/* Initialize the emulator. */
+extern void init_real_once PARAMS ((void));
+
+/* Binary or unary arithmetic on tree_code. */
+extern void real_arithmetic PARAMS ((REAL_VALUE_TYPE *, int,
+ const REAL_VALUE_TYPE *,
+ const REAL_VALUE_TYPE *));
+
+/* Compare reals by tree_code. */
+extern bool real_compare PARAMS ((int, const REAL_VALUE_TYPE *,
+ const REAL_VALUE_TYPE *));
+
+/* Determine whether a floating-point value X is infinite. */
+extern bool real_isinf PARAMS ((const REAL_VALUE_TYPE *));
+
+/* Determine whether a floating-point value X is a NaN. */
+extern bool real_isnan PARAMS ((const REAL_VALUE_TYPE *));
+
+/* Determine whether a floating-point value X is negative. */
+extern bool real_isneg PARAMS ((const REAL_VALUE_TYPE *));
+
+/* Determine whether a floating-point value X is minus zero. */
+extern bool real_isnegzero PARAMS ((const REAL_VALUE_TYPE *));
+
+/* Compare two floating-point objects for bitwise identity. */
+extern bool real_identical PARAMS ((const REAL_VALUE_TYPE *,
+ const REAL_VALUE_TYPE *));
+
+/* Extend or truncate to a new mode. */
+extern void real_convert PARAMS ((REAL_VALUE_TYPE *,
+ enum machine_mode,
+ const REAL_VALUE_TYPE *));
+
+/* Return true if truncating to NEW is exact. */
+extern bool exact_real_truncate PARAMS ((enum machine_mode,
+ const REAL_VALUE_TYPE *));
+
+/* Render R as a decimal floating point constant. */
+extern void real_to_decimal PARAMS ((char *, const REAL_VALUE_TYPE *,
+ int));
+
+/* Render R as a hexadecimal floating point constant. */
+extern void real_to_hexadecimal PARAMS ((char *, const REAL_VALUE_TYPE *,
+ int));
+
+/* Render R as an integer. */
+extern HOST_WIDE_INT real_to_integer PARAMS ((const REAL_VALUE_TYPE *));
+extern void real_to_integer2 PARAMS ((HOST_WIDE_INT *, HOST_WIDE_INT *,
+ const REAL_VALUE_TYPE *));
+
+/* Initialize R from a decimal or hexadecimal string. */
+extern void real_from_string PARAMS ((REAL_VALUE_TYPE *, const char *));
+
+/* Initialize R from an integer pair HIGH/LOW. */
+extern void real_from_integer PARAMS ((REAL_VALUE_TYPE *,
+ enum machine_mode,
+ unsigned HOST_WIDE_INT,
+ HOST_WIDE_INT, int));
+
+extern long real_to_target PARAMS ((long *, const REAL_VALUE_TYPE *,
+ enum machine_mode));
+
+extern void real_from_target PARAMS ((REAL_VALUE_TYPE *, const long *,
+ enum machine_mode));
+
+extern void real_inf PARAMS ((REAL_VALUE_TYPE *));
+
+extern void real_nan PARAMS ((REAL_VALUE_TYPE *, const char *,
+ int, enum machine_mode));
+
+extern void real_2expN PARAMS ((REAL_VALUE_TYPE *, int));
+
+/* ====================================================================== */
+/* Crap. */
+
/* Define codes for all the float formats that we know of. */
#define UNKNOWN_FLOAT_FORMAT 0
#define IEEE_FLOAT_FORMAT 1
#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
#endif
-#ifndef HOST_FLOAT_FORMAT
-#define HOST_FLOAT_FORMAT IEEE_FLOAT_FORMAT
-#endif
-
-#ifndef INTEL_EXTENDED_IEEE_FORMAT
-#define INTEL_EXTENDED_IEEE_FORMAT 0
-#endif
-
-/* If FLOAT_WORDS_BIG_ENDIAN and HOST_FLOAT_WORDS_BIG_ENDIAN are not defined
- in the header files, then this implies the word-endianness is the same as
- for integers. */
+#define REAL_ARITHMETIC(value, code, d1, d2) \
+ real_arithmetic (&(value), code, &(d1), &(d2))
-/* This is defined 0 or 1, like WORDS_BIG_ENDIAN. */
-#ifndef FLOAT_WORDS_BIG_ENDIAN
-#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
-#endif
+#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))
-/* This is defined 0 or 1, unlike HOST_WORDS_BIG_ENDIAN. */
-#ifndef HOST_FLOAT_WORDS_BIG_ENDIAN
-#ifdef HOST_WORDS_BIG_ENDIAN
-#define HOST_FLOAT_WORDS_BIG_ENDIAN 1
-#else
-#define HOST_FLOAT_WORDS_BIG_ENDIAN 0
-#endif
-#endif
+/* Determine whether a floating-point value X is infinite. */
+#define REAL_VALUE_ISINF(x) real_isinf (&(x))
-#ifndef LONG_DOUBLE_TYPE_SIZE
-#define LONG_DOUBLE_TYPE_SIZE 64
-#endif
-/* MAX_LONG_DOUBLE_TYPE_SIZE is a constant tested by #if.
- LONG_DOUBLE_TYPE_SIZE can vary at compiler run time.
- So long as macros like REAL_VALUE_TO_TARGET_LONG_DOUBLE cannot
- vary too, however, then XFmode and TFmode long double
- cannot both be supported at the same time. */
-#ifndef MAX_LONG_DOUBLE_TYPE_SIZE
-#define MAX_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
-#endif
+/* Determine whether a floating-point value X is a NaN. */
+#define REAL_VALUE_ISNAN(x) real_isnan (&(x))
-/* **** Start of software floating point emulator interface macros **** */
+/* Determine whether a floating-point value X is negative. */
+#define REAL_VALUE_NEGATIVE(x) real_isneg (&(x))
-/* REAL_VALUE_TYPE is an array of the minimum number of HOST_WIDE_INTs
- required to hold MAX_LONG_DOUBLE_TYPE_SIZE bits. */
-#if MAX_LONG_DOUBLE_TYPE_SIZE == 128
-/* For 128 bit reals, we calculate internally with extra precision. */
-#define N (160 / BITS_PER_UNIT)
-#else
-#define N (MAX_LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)
-#endif
-#define S sizeof (HOST_WIDE_INT)
-typedef struct {
- HOST_WIDE_INT r[N/S + (N%S ? 1 : 0)]; /* round up */
-} REAL_VALUE_TYPE;
-#undef N
-#undef S
+/* Determine whether a floating-point value X is minus zero. */
+#define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x))
-extern unsigned int significand_size PARAMS ((enum machine_mode));
+/* 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_ARITHMETIC(value, code, d1, d2) \
- earith (&(value), (code), &(d1), &(d2))
+#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
+ real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0))
-/* Declare functions in real.c. */
-extern void earith PARAMS ((REAL_VALUE_TYPE *, int,
- REAL_VALUE_TYPE *, REAL_VALUE_TYPE *));
-extern REAL_VALUE_TYPE etrunci PARAMS ((REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE etruncui PARAMS ((REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE ereal_negate PARAMS ((REAL_VALUE_TYPE));
-extern HOST_WIDE_INT efixi PARAMS ((REAL_VALUE_TYPE));
-extern unsigned HOST_WIDE_INT efixui PARAMS ((REAL_VALUE_TYPE));
-extern void ereal_from_int PARAMS ((REAL_VALUE_TYPE *,
- HOST_WIDE_INT, HOST_WIDE_INT,
- enum machine_mode));
-extern void ereal_from_uint PARAMS ((REAL_VALUE_TYPE *,
- unsigned HOST_WIDE_INT,
- unsigned HOST_WIDE_INT,
- enum machine_mode));
-extern void ereal_to_int PARAMS ((HOST_WIDE_INT *, HOST_WIDE_INT *,
- REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE ereal_ldexp PARAMS ((REAL_VALUE_TYPE, int));
-
-extern void etartdouble PARAMS ((REAL_VALUE_TYPE, long *));
-extern void etarldouble PARAMS ((REAL_VALUE_TYPE, long *));
-extern void etardouble PARAMS ((REAL_VALUE_TYPE, long *));
-extern long etarsingle PARAMS ((REAL_VALUE_TYPE));
-extern void ereal_to_decimal PARAMS ((REAL_VALUE_TYPE, char *));
-extern int ereal_cmp PARAMS ((REAL_VALUE_TYPE, REAL_VALUE_TYPE));
-extern int ereal_isneg PARAMS ((REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE ereal_unto_float PARAMS ((long));
-extern REAL_VALUE_TYPE ereal_unto_double PARAMS ((long *));
-extern REAL_VALUE_TYPE ereal_from_float PARAMS ((HOST_WIDE_INT));
-extern REAL_VALUE_TYPE ereal_from_double PARAMS ((HOST_WIDE_INT *));
-
-#define REAL_VALUES_EQUAL(x, y) (ereal_cmp ((x), (y)) == 0)
-/* true if x < y : */
-#define REAL_VALUES_LESS(x, y) (ereal_cmp ((x), (y)) == -1)
-#define REAL_VALUE_LDEXP(x, n) ereal_ldexp (x, n)
-
-/* Compare two floating-point objects for bitwise identity.
- This is not the same as comparing for equality on IEEE hosts:
- -0.0 equals 0.0 but they are not identical, and conversely
- two NaNs might be identical but they cannot be equal. */
-#define REAL_VALUES_IDENTICAL(x, y) \
- (!memcmp ((char *) &(x), (char *) &(y), sizeof (REAL_VALUE_TYPE)))
-
-/* These return REAL_VALUE_TYPE: */
-#define REAL_VALUE_RNDZINT(x) (etrunci (x))
-#define REAL_VALUE_UNSIGNED_RNDZINT(x) (etruncui (x))
-
-/* Truncate the floating-point value X to mode MODE. */
-#define REAL_VALUE_TRUNCATE(mode, x) real_value_truncate (mode, x)
-extern REAL_VALUE_TYPE real_value_truncate PARAMS ((enum machine_mode,
- REAL_VALUE_TYPE));
+/* 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)))
-/* These return HOST_WIDE_INT: */
-/* Convert a floating-point value to integer, rounding toward zero. */
-#define REAL_VALUE_FIX(x) (efixi (x))
-/* Convert a floating-point value to unsigned integer, rounding
- toward zero. */
-#define REAL_VALUE_UNSIGNED_FIX(x) (efixui (x))
+#define REAL_VALUE_TO_DECIMAL(r, s, dig) \
+ real_to_decimal (s, &(r), dig)
-/* Convert ASCII string S to floating point in mode M.
- Decimal input uses ATOF. Hexadecimal uses HTOF. */
-#define REAL_VALUE_ATOF(s,m) ereal_atof(s,m)
-#define REAL_VALUE_HTOF(s,m) ereal_atof(s,m)
+#define REAL_VALUE_FROM_INT(r, lo, hi, mode) \
+ real_from_integer (&(r), mode, lo, hi, 0)
-#define REAL_VALUE_NEGATE ereal_negate
+#define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \
+ real_from_integer (&(r), mode, lo, hi, 1)
-/* Determine whether a floating-point value X is infinite. */
-#define REAL_VALUE_ISINF(x) (target_isinf (x))
+extern REAL_VALUE_TYPE real_value_truncate PARAMS ((enum machine_mode,
+ REAL_VALUE_TYPE));
-/* Determine whether a floating-point value X is a NaN. */
-#define REAL_VALUE_ISNAN(x) (target_isnan (x))
+#define REAL_VALUE_TO_INT(plow, phigh, r) \
+ real_to_integer2 (plow, phigh, &(r))
-/* Determine whether a floating-point value X is negative. */
-#define REAL_VALUE_NEGATIVE(x) (target_negative (x))
+extern REAL_VALUE_TYPE real_arithmetic2 PARAMS ((int, const REAL_VALUE_TYPE *,
+ const REAL_VALUE_TYPE *));
-/* Determine whether a floating-point value X is minus zero. */
-#define REAL_VALUE_MINUS_ZERO(x) \
- ((ereal_cmp (x, dconst0) == 0) && (ereal_isneg (x) != 0 ))
+#define REAL_VALUE_NEGATE(X) \
+ real_arithmetic2 (NEGATE_EXPR, &(X), NULL)
-#define REAL_VALUE_TO_INT ereal_to_int
+#define REAL_VALUE_ABS(X) \
+ real_arithmetic2 (ABS_EXPR, &(X), NULL)
-/* Here the cast to HOST_WIDE_INT sign-extends arguments such as ~0. */
-#define REAL_VALUE_FROM_INT(d, lo, hi, mode) \
- ereal_from_int (&d, (HOST_WIDE_INT) (lo), (HOST_WIDE_INT) (hi), mode)
+extern int significand_size PARAMS ((enum machine_mode));
-#define REAL_VALUE_FROM_UNSIGNED_INT(d, lo, hi, mode) \
- ereal_from_uint (&d, lo, hi, mode)
+extern REAL_VALUE_TYPE real_from_string2 PARAMS ((const char *,
+ enum machine_mode));
-/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */
-#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \
- (LONG_DOUBLE_TYPE_SIZE == 64 ? etardouble ((IN), (OUT)) \
- : LONG_DOUBLE_TYPE_SIZE == 96 ? etarldouble ((IN), (OUT)) \
- : LONG_DOUBLE_TYPE_SIZE == 128 ? etartdouble ((IN), (OUT)) \
- : abort ())
-#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) (etardouble ((IN), (OUT)))
+#define REAL_VALUE_ATOF(s, m) \
+ real_from_string2 (s, m)
-/* IN is a REAL_VALUE_TYPE. OUT is a long. */
-#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) ((OUT) = etarsingle ((IN)))
+#define CONST_DOUBLE_ATOF(s, m) \
+ CONST_DOUBLE_FROM_REAL_VALUE (real_from_string2 (s, m), m)
-/* Inverse of REAL_VALUE_TO_TARGET_DOUBLE. */
-#define REAL_VALUE_UNTO_TARGET_DOUBLE(d) (ereal_unto_double (d))
+#define REAL_VALUE_FIX(r) \
+ real_to_integer (&(r))
-/* Inverse of REAL_VALUE_TO_TARGET_SINGLE. */
-#define REAL_VALUE_UNTO_TARGET_SINGLE(f) (ereal_unto_float (f))
+/* ??? Not quite right. */
+#define REAL_VALUE_UNSIGNED_FIX(r) \
+ real_to_integer (&(r))
-/* d is an array of HOST_WIDE_INT that holds a double precision
- value in the target computer's floating point format. */
-#define REAL_VALUE_FROM_TARGET_DOUBLE(d) (ereal_from_double (d))
+/* ??? These were added for Paranoia support. */
-/* f is a HOST_WIDE_INT containing a single precision target float value. */
-#define REAL_VALUE_FROM_TARGET_SINGLE(f) (ereal_from_float (f))
+/* Return floor log2(R). */
+extern int real_exponent PARAMS ((const REAL_VALUE_TYPE *));
-/* Conversions to decimal ASCII string. */
-#define REAL_VALUE_TO_DECIMAL(r, fmt, s) (ereal_to_decimal (r, s))
+/* R = A * 2**EXP. */
+extern void real_ldexp PARAMS ((REAL_VALUE_TYPE *,
+ const REAL_VALUE_TYPE *, int));
/* **** End of software floating point emulator interface macros **** */
\f
extern REAL_VALUE_TYPE dconst2;
extern REAL_VALUE_TYPE dconstm1;
-/* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */
/* Function to return a real value (not a tree node)
from a given integer constant. */
-union tree_node;
REAL_VALUE_TYPE real_value_from_int_cst PARAMS ((union tree_node *,
- union tree_node *));
+ union tree_node *));
-#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \
+/* 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))
/* Return a CONST_DOUBLE with value R and mode M. */
-
-#define CONST_DOUBLE_FROM_REAL_VALUE(r, m) immed_real_const_1 (r, m)
-extern struct rtx_def *immed_real_const_1 PARAMS ((REAL_VALUE_TYPE,
- enum machine_mode));
+#define CONST_DOUBLE_FROM_REAL_VALUE(r, m) \
+ const_double_from_real_value (r, m)
+extern rtx const_double_from_real_value PARAMS ((REAL_VALUE_TYPE,
+ enum machine_mode));
/* Replace R by 1/R in the given machine mode, if the result is exact. */
-extern int exact_real_inverse PARAMS ((enum machine_mode, REAL_VALUE_TYPE *));
-extern int target_isnan PARAMS ((REAL_VALUE_TYPE));
-extern int target_isinf PARAMS ((REAL_VALUE_TYPE));
-extern int target_negative PARAMS ((REAL_VALUE_TYPE));
-extern void debug_real PARAMS ((REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE ereal_atof PARAMS ((const char *, enum machine_mode));
+extern bool exact_real_inverse PARAMS ((enum machine_mode, REAL_VALUE_TYPE *));
+
+/* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */
+extern tree build_real PARAMS ((tree, REAL_VALUE_TYPE));
+
#endif /* ! GCC_REAL_H */
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