-/* Front-end tree definitions for GNU compiler.
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+/* Definitions of floating-point access for GNU compiler.
+ Copyright (C) 1989, 1991, 1994, 1996, 1997 Free Software Foundation, Inc.
This file is part of GNU CC.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
#ifndef REAL_H_INCLUDED
#define REAL_H_INCLUDED
#define IEEE_FLOAT_FORMAT 1
#define VAX_FLOAT_FORMAT 2
#define IBM_FLOAT_FORMAT 3
+#define C4X_FLOAT_FORMAT 4
/* Default to IEEE float if not specified. Nearly all machines use it. */
#define REAL_INFINITY
#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. */
+
+/* This is defined 0 or 1, like WORDS_BIG_ENDIAN. */
+#ifndef FLOAT_WORDS_BIG_ENDIAN
+#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
+#endif
+
+/* 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
+
/* Defining REAL_ARITHMETIC invokes a floating point emulator
that can produce a target machine format differing by more
than just endian-ness from the host's format. The emulator
#endif /* no TFmode support */
#endif /* no XFmode support */
+extern int significand_size PROTO((enum machine_mode));
+
/* If emulation has been enabled by defining REAL_ARITHMETIC or by
setting LONG_DOUBLE_TYPE_SIZE to 96 or 128, then define macros so that
they invoke emulator functions. This will succeed only if the machine
#define REAL_ARITHMETIC(value, code, d1, d2) \
earith (&(value), (code), &(d1), &(d2))
-/* Declare functions in real.c that are referenced here. */
-void earith (), ereal_from_uint (), ereal_from_int (), ereal_to_int ();
-void etarldouble (), etartdouble (), etardouble ();
-long etarsingle (), efixi ();
-unsigned long efixui ();
-int ereal_cmp (), ereal_isneg ();
-unsigned int eroundui ();
-REAL_VALUE_TYPE etrunci (), etruncui (), ereal_ldexp (), ereal_atof ();
-REAL_VALUE_TYPE ereal_negate (), ereal_truncate ();
-REAL_VALUE_TYPE ereal_from_float (), ereal_from_double ();
+/* Declare functions in real.c. */
+extern void earith PROTO((REAL_VALUE_TYPE *, int,
+ REAL_VALUE_TYPE *, REAL_VALUE_TYPE *));
+extern REAL_VALUE_TYPE etrunci PROTO((REAL_VALUE_TYPE));
+extern REAL_VALUE_TYPE etruncui PROTO((REAL_VALUE_TYPE));
+extern REAL_VALUE_TYPE ereal_atof PROTO((char *, enum machine_mode));
+extern REAL_VALUE_TYPE ereal_negate PROTO((REAL_VALUE_TYPE));
+extern HOST_WIDE_INT efixi PROTO((REAL_VALUE_TYPE));
+extern unsigned HOST_WIDE_INT efixui PROTO((REAL_VALUE_TYPE));
+extern void ereal_from_int PROTO((REAL_VALUE_TYPE *,
+ HOST_WIDE_INT, HOST_WIDE_INT,
+ enum machine_mode));
+extern void ereal_from_uint PROTO((REAL_VALUE_TYPE *,
+ unsigned HOST_WIDE_INT,
+ unsigned HOST_WIDE_INT,
+ enum machine_mode));
+extern void ereal_to_int PROTO((HOST_WIDE_INT *, HOST_WIDE_INT *,
+ REAL_VALUE_TYPE));
+extern REAL_VALUE_TYPE ereal_ldexp PROTO((REAL_VALUE_TYPE, int));
+
+extern void etartdouble PROTO((REAL_VALUE_TYPE, long *));
+extern void etarldouble PROTO((REAL_VALUE_TYPE, long *));
+extern void etardouble PROTO((REAL_VALUE_TYPE, long *));
+extern long etarsingle PROTO((REAL_VALUE_TYPE));
+extern void ereal_to_decimal PROTO((REAL_VALUE_TYPE, char *));
+extern int ereal_cmp PROTO((REAL_VALUE_TYPE, REAL_VALUE_TYPE));
+extern int ereal_isneg PROTO((REAL_VALUE_TYPE));
+extern REAL_VALUE_TYPE ereal_unto_float PROTO((long));
+extern REAL_VALUE_TYPE ereal_unto_double PROTO((long *));
+extern REAL_VALUE_TYPE ereal_from_float PROTO((HOST_WIDE_INT));
+extern REAL_VALUE_TYPE ereal_from_double PROTO((HOST_WIDE_INT *));
#define REAL_VALUES_EQUAL(x, y) (ereal_cmp ((x), (y)) == 0)
/* true if x < y : */
/* These return REAL_VALUE_TYPE: */
#define REAL_VALUE_RNDZINT(x) (etrunci (x))
#define REAL_VALUE_UNSIGNED_RNDZINT(x) (etruncui (x))
-extern REAL_VALUE_TYPE real_value_truncate ();
+extern REAL_VALUE_TYPE real_value_truncate PROTO ((enum machine_mode,
+ REAL_VALUE_TYPE));
#define REAL_VALUE_TRUNCATE(mode, x) real_value_truncate (mode, x)
-/* These return int: */
+/* 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
((ereal_cmp (x, dconst0) == 0) && (ereal_isneg (x) != 0 ))
#define REAL_VALUE_TO_INT ereal_to_int
-#define REAL_VALUE_FROM_INT(d, i, j) (ereal_from_int (&d, i, j))
-#define REAL_VALUE_FROM_UNSIGNED_INT(d, i, j) (ereal_from_uint (&d, i, j))
+
+/* 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)
+
+#define REAL_VALUE_FROM_UNSIGNED_INT(d, lo, hi, mode) \
+ ereal_from_uint (&d, lo, hi, mode)
/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */
#if LONG_DOUBLE_TYPE_SIZE == 96
/* IN is a REAL_VALUE_TYPE. OUT is a long. */
#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) ((OUT) = etarsingle ((IN)))
-/* d is an array of longs. */
+/* Inverse of REAL_VALUE_TO_TARGET_DOUBLE. */
+#define REAL_VALUE_UNTO_TARGET_DOUBLE(d) (ereal_unto_double (d))
+
+/* Inverse of REAL_VALUE_TO_TARGET_SINGLE. */
+#define REAL_VALUE_UNTO_TARGET_SINGLE(f) (ereal_unto_float (f))
+
+/* 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))
-/* f is a long. */
+/* f is a HOST_WIDE_INT containing a single precision target float value. */
#define REAL_VALUE_FROM_TARGET_SINGLE(f) (ereal_from_float (f))
/* Conversions to decimal ASCII string. */
values which is its bitwise equivalent, but put the two words into
proper word order for the target. */
#ifndef REAL_VALUE_TO_TARGET_DOUBLE
-#if defined (HOST_WORDS_BIG_ENDIAN) == WORDS_BIG_ENDIAN
#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
do { REAL_VALUE_TYPE in = (IN); /* Make sure it's not in a register. */\
- (OUT)[0] = ((long *) &in)[0]; \
- (OUT)[1] = ((long *) &in)[1]; \
- } while (0)
-#else
-#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
-do { REAL_VALUE_TYPE in = (IN); /* Make sure it's not in a register. */\
- (OUT)[1] = ((long *) &in)[0]; \
- (OUT)[0] = ((long *) &in)[1]; \
+ if (HOST_FLOAT_WORDS_BIG_ENDIAN == FLOAT_WORDS_BIG_ENDIAN) \
+ { \
+ (OUT)[0] = ((long *) &in)[0]; \
+ (OUT)[1] = ((long *) &in)[1]; \
+ } \
+ else \
+ { \
+ (OUT)[1] = ((long *) &in)[0]; \
+ (OUT)[0] = ((long *) &in)[1]; \
+ } \
} while (0)
#endif
-#endif
#endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
/* In this configuration, double and long double are the same. */
#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(a, b) REAL_VALUE_TO_TARGET_DOUBLE (a, b)
#endif
+/* 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) \
+ (!bcmp ((char *) &(x), (char *) &(y), sizeof (REAL_VALUE_TYPE)))
+
/* Compare two floating-point values for equality. */
#ifndef REAL_VALUES_EQUAL
#define REAL_VALUES_EQUAL(x, y) ((x) == (y))
size and where `float' is SFmode. */
/* Don't use REAL_VALUE_TRUNCATE directly--always call real_value_truncate. */
-extern REAL_VALUE_TYPE real_value_truncate ();
+extern REAL_VALUE_TYPE real_value_truncate PROTO((enum machine_mode, REAL_VALUE_TYPE));
#ifndef REAL_VALUE_TRUNCATE
#define REAL_VALUE_TRUNCATE(mode, x) \
#define REAL_VALUE_NEGATIVE(x) (target_negative (x))
#endif
+extern int target_isnan PROTO ((REAL_VALUE_TYPE));
+extern int target_isinf PROTO ((REAL_VALUE_TYPE));
+extern int target_negative PROTO ((REAL_VALUE_TYPE));
+
/* Determine whether a floating-point value X is minus 0. */
#ifndef REAL_VALUE_MINUS_ZERO
#define REAL_VALUE_MINUS_ZERO(x) ((x) == 0 && REAL_VALUE_NEGATIVE (x))
or cc0_rtx if it is not on the chain. */
#define CONST_DOUBLE_MEM(r) XEXP (r, 0)
+/* 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. */
-REAL_VALUE_TYPE real_value_from_int_cst ();
-
-/* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */
+union tree_node;
+REAL_VALUE_TYPE real_value_from_int_cst PROTO ((union tree_node *,
+ union tree_node *));
#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \
do { union real_extract u; \
- bcopy (&CONST_DOUBLE_LOW ((from)), &u, sizeof u); \
+ bcopy ((char *) &CONST_DOUBLE_LOW ((from)), (char *) &u, sizeof u); \
to = u.d; } while (0)
/* 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 PROTO((REAL_VALUE_TYPE,
+ enum machine_mode));
+
/* Convert a floating point value `r', that can be interpreted
as a host machine float or double, to a decimal ASCII string `s'
#define REAL_VALUE_TO_DECIMAL(r, fmt, s) (sprintf (s, fmt, r))
#endif
+/* Replace R by 1/R in the given machine mode, if the result is exact. */
+extern int exact_real_inverse PROTO((enum machine_mode, REAL_VALUE_TYPE *));
+
+extern void debug_real PROTO ((REAL_VALUE_TYPE));
+
+/* In varasm.c */
+extern void assemble_real PROTO ((REAL_VALUE_TYPE,
+ enum machine_mode));
#endif /* Not REAL_H_INCLUDED */
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