-/* Front-end tree definitions for GNU compiler.
- Copyright (C) 1989, 1991, 1994 Free Software Foundation, Inc.
+/* Definitions of floating-point access for GNU compiler.
+ Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998,
+ 1999, 2000 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. */
#ifndef LONG_DOUBLE_TYPE_SIZE
#define LONG_DOUBLE_TYPE_SIZE 64
#endif
-#if (LONG_DOUBLE_TYPE_SIZE == 96) || (LONG_DOUBLE_TYPE_SIZE == 128)
+/* 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
+#if (MAX_LONG_DOUBLE_TYPE_SIZE == 96) || (MAX_LONG_DOUBLE_TYPE_SIZE == 128)
#ifndef REAL_ARITHMETIC
#define REAL_ARITHMETIC
#endif
/* Support 80-bit extended real XFmode if LONG_DOUBLE_TYPE_SIZE
has been defined to be 96 in the tm.h machine file. */
-#if (LONG_DOUBLE_TYPE_SIZE == 96)
+#if (MAX_LONG_DOUBLE_TYPE_SIZE == 96)
#define REAL_IS_NOT_DOUBLE
#define REAL_ARITHMETIC
typedef struct {
#else /* no XFmode support */
-#if (LONG_DOUBLE_TYPE_SIZE == 128)
+#if (MAX_LONG_DOUBLE_TYPE_SIZE == 128)
#define REAL_IS_NOT_DOUBLE
#define REAL_ARITHMETIC
#endif /* no TFmode support */
#endif /* no XFmode support */
-extern int significand_size PROTO((enum machine_mode));
+extern unsigned int significand_size PARAMS ((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
earith (&(value), (code), &(d1), &(d2))
/* Declare functions in real.c. */
-extern void earith PROTO((REAL_VALUE_TYPE *, int,
+extern void earith PARAMS ((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));
-extern void ereal_from_uint PROTO((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_atof PARAMS ((const char *, enum machine_mode));
+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,
- unsigned HOST_WIDE_INT));
-extern void ereal_to_int PROTO((HOST_WIDE_INT *, 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 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_from_float PROTO((HOST_WIDE_INT));
-extern REAL_VALUE_TYPE ereal_from_double PROTO((HOST_WIDE_INT *));
+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 : */
/* 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 PARAMS ((enum machine_mode,
+ REAL_VALUE_TYPE));
#define REAL_VALUE_TRUNCATE(mode, x) real_value_truncate (mode, x)
/* These return HOST_WIDE_INT: */
toward zero. */
#define REAL_VALUE_UNSIGNED_FIX(x) (efixui (x))
-#define REAL_VALUE_ATOF ereal_atof
+/* 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_NEGATE ereal_negate
#define REAL_VALUE_MINUS_ZERO(x) \
#define REAL_VALUE_TO_INT ereal_to_int
/* Here the cast to HOST_WIDE_INT sign-extends arguments such as ~0. */
-#define REAL_VALUE_FROM_INT(d, lo, hi) \
- ereal_from_int (&d, (HOST_WIDE_INT) (lo), (HOST_WIDE_INT) (hi))
+#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) (ereal_from_uint (&d, lo, hi))
+#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
+#if MAX_LONG_DOUBLE_TYPE_SIZE == 96
#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) (etarldouble ((IN), (OUT)))
#else
#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) (etartdouble ((IN), (OUT)))
/* IN is a REAL_VALUE_TYPE. OUT is a long. */
#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) ((OUT) = etarsingle ((IN)))
+/* 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))
value in host format and then to a single type `long' value which
is the bitwise equivalent of the `float' value. */
#ifndef REAL_VALUE_TO_TARGET_SINGLE
-#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \
-do { float f = (float) (IN); \
- (OUT) = *(long *) &f; \
- } while (0)
+#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \
+do { \
+ union { \
+ float f; \
+ HOST_WIDE_INT l; \
+ } u; \
+ if (sizeof(HOST_WIDE_INT) < sizeof(float)) \
+ abort(); \
+ u.l = 0; \
+ u.f = (IN); \
+ (OUT) = u.l; \
+} while (0)
#endif
/* Convert a type `double' value in host format to a pair of type `long'
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 HOST_FLOAT_WORDS_BIG_ENDIAN == FLOAT_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]; \
- } while (0)
-#endif
+do { \
+ union { \
+ REAL_VALUE_TYPE f; \
+ HOST_WIDE_INT l[2]; \
+ } u; \
+ if (sizeof(HOST_WIDE_INT) * 2 < sizeof(REAL_VALUE_TYPE)) \
+ abort(); \
+ u.l[0] = u.l[1] = 0; \
+ u.f = (IN); \
+ if (HOST_FLOAT_WORDS_BIG_ENDIAN == FLOAT_WORDS_BIG_ENDIAN) \
+ (OUT)[0] = u.l[0], (OUT)[1] = u.l[1]; \
+ else \
+ (OUT)[1] = u.l[0], (OUT)[0] = u.l[1]; \
+} while (0)
#endif
#endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
#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))
/* Scale X by Y powers of 2. */
#ifndef REAL_VALUE_LDEXP
#define REAL_VALUE_LDEXP(x, y) ldexp (x, y)
-extern double ldexp ();
+extern double ldexp PARAMS ((double, int));
#endif
/* Convert the string X to a floating-point value. */
#ifndef REAL_VALUE_ATOF
#if 1
/* Use real.c to convert decimal numbers to binary, ... */
-REAL_VALUE_TYPE ereal_atof ();
+extern REAL_VALUE_TYPE ereal_atof PARAMS ((const char *, enum machine_mode));
#define REAL_VALUE_ATOF(x, s) ereal_atof (x, s)
+/* Could use ereal_atof here for hexadecimal floats too, but real_hex_to_f
+ is OK and it uses faster native fp arithmetic. */
+/* #define REAL_VALUE_HTOF(x, s) ereal_atof (x, s) */
#else
/* ... or, if you like the host computer's atof, go ahead and use it: */
#define REAL_VALUE_ATOF(x, s) atof (x)
#endif
#endif
+/* Hexadecimal floating constant input for use with host computer's
+ fp arithmetic. */
+#ifndef REAL_VALUE_HTOF
+extern REAL_VALUE_TYPE real_hex_to_f PARAMS ((char *, enum machine_mode));
+#define REAL_VALUE_HTOF(s,m) real_hex_to_f(s,m)
+#endif
+
/* Negate the floating-point value X. */
#ifndef REAL_VALUE_NEGATE
#define REAL_VALUE_NEGATE(x) (- (x))
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 PARAMS ((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 PARAMS ((REAL_VALUE_TYPE));
+extern int target_isinf PARAMS ((REAL_VALUE_TYPE));
+extern int target_negative PARAMS ((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))
#define CONST_DOUBLE_HIGH(r) XWINT (r, 3)
/* Link for chain of all CONST_DOUBLEs in use in current function. */
-#define CONST_DOUBLE_CHAIN(r) XEXP (r, 1)
+#define CONST_DOUBLE_CHAIN(r) X0EXP (r, 1)
/* The MEM which represents this CONST_DOUBLE's value in memory,
or const0_rtx if no MEM has been made for it yet,
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 PARAMS ((union tree_node *,
+ union tree_node *));
#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \
do { union real_extract u; \
/* 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,
+extern struct rtx_def *immed_real_const_1 PARAMS ((REAL_VALUE_TYPE,
enum machine_mode));
#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 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));
+
+/* In varasm.c */
+extern void assemble_real PARAMS ((REAL_VALUE_TYPE,
+ enum machine_mode));
+extern void debug_real PARAMS ((REAL_VALUE_TYPE));
+
+/* In varasm.c */
+extern void assemble_real PARAMS ((REAL_VALUE_TYPE,
+ enum machine_mode));
#endif /* Not REAL_H_INCLUDED */
OSDN Git Service
