view gcc/config/s390/fixdfdi.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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/* Definitions of target machine for GNU compiler, for IBM S/390
   Copyright (C) 1999, 2000, 2001, 2007, 2008 Free Software Foundation, Inc.
   Contributed by Hartmut Penner (hpenner@de.ibm.com) and
                  Ulrich Weigand (uweigand@de.ibm.com).

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 3, 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 COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#ifdef L_fixunstfdi

#define EXPD(fp)	   (((fp.l.i[0]) >> 16) & 0x7FFF)
#define EXPONENT_BIAS	   16383
#define MANTISSA_BITS      112
#define PRECISION          (MANTISSA_BITS + 1)
#define SIGNBIT		   0x80000000
#define SIGND(fp)	   ((fp.l.i[0]) & SIGNBIT)
#define MANTD_HIGH_LL(fp)  ((fp.ll[0] & HIGH_LL_FRAC_MASK) | HIGH_LL_UNIT_BIT)
#define MANTD_LOW_LL(fp)   (fp.ll[1])
#define FRACD_ZERO_P(fp)   (!fp.ll[1] && !(fp.ll[0] & HIGH_LL_FRAC_MASK))
#define HIGH_LL_FRAC_BITS  48
#define HIGH_LL_UNIT_BIT   ((UDItype_x)1 << HIGH_LL_FRAC_BITS)
#define HIGH_LL_FRAC_MASK  (HIGH_LL_UNIT_BIT - 1)

typedef int DItype_x __attribute__ ((mode (DI)));
typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
typedef int SItype_x __attribute__ ((mode (SI)));
typedef unsigned int USItype_x __attribute__ ((mode (SI)));

union double_long {
  long double d;
  struct {
      SItype_x i[4]; /* 32 bit parts: 0 upper ... 3 lowest */
    } l;
  UDItype_x ll[2];   /* 64 bit parts: 0 upper, 1 lower */
};

UDItype_x __fixunstfdi (long double a1);

/* convert double to unsigned int */
UDItype_x
__fixunstfdi (long double a1)
{
    register union double_long dl1;
    register int exp;
    register UDItype_x l;

    dl1.d = a1;

    /* +/- 0, denormalized, negative */
    if (!EXPD (dl1) || SIGND(dl1))
      return 0;

    /* The exponent - considered the binary point at the right end of 
       the mantissa.  */
    exp = EXPD (dl1) - EXPONENT_BIAS - MANTISSA_BITS;

    /* number < 1: If the mantissa would need to be right-shifted more bits than
       its size (plus the implied one bit on the left) the result would be 
       zero.  */
    if (exp <= -PRECISION)
      return 0;

    /* NaN: All exponent bits set and a nonzero fraction.  */
    if ((EXPD(dl1) == 0x7fff) && !FRACD_ZERO_P (dl1))
      return 0x0ULL;

    /* One extra bit is needed for the unit bit which is appended by
       MANTD_HIGH_LL on the left of the matissa.  */
    exp += HIGH_LL_FRAC_BITS + 1;

    /* If the result would still need a left shift it will be too large
       to be represented.  */
    if (exp > 0)
      return 0xFFFFFFFFFFFFFFFFULL;

    l = MANTD_LOW_LL (dl1) >> (HIGH_LL_FRAC_BITS + 1)
        | MANTD_HIGH_LL (dl1) << (64 - (HIGH_LL_FRAC_BITS + 1));

    return l >> -exp;
}
#define __fixunstfdi ___fixunstfdi
#endif
#undef L_fixunstfdi

#ifdef L_fixtfdi
#define EXPD(fp)	   (((fp.l.i[0]) >> 16) & 0x7FFF)
#define EXPONENT_BIAS	   16383
#define MANTISSA_BITS      112
#define PRECISION          (MANTISSA_BITS + 1)
#define SIGNBIT		   0x80000000
#define SIGND(fp)	   ((fp.l.i[0]) & SIGNBIT)
#define MANTD_HIGH_LL(fp)  ((fp.ll[0] & HIGH_LL_FRAC_MASK) | HIGH_LL_UNIT_BIT)
#define MANTD_LOW_LL(fp)   (fp.ll[1])
#define FRACD_ZERO_P(fp)   (!fp.ll[1] && !(fp.ll[0] & HIGH_LL_FRAC_MASK))
#define HIGH_LL_FRAC_BITS  48
#define HIGH_LL_UNIT_BIT   ((UDItype_x)1 << HIGH_LL_FRAC_BITS)
#define HIGH_LL_FRAC_MASK  (HIGH_LL_UNIT_BIT - 1)

typedef int DItype_x __attribute__ ((mode (DI)));
typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
typedef int SItype_x __attribute__ ((mode (SI)));
typedef unsigned int USItype_x __attribute__ ((mode (SI)));

union double_long {
  long double d;
  struct {
      SItype_x i[4]; /* 32 bit parts: 0 upper ... 3 lowest */
    } l;
  UDItype_x ll[2];   /* 64 bit parts: 0 upper, 1 lower */
};

DItype_x __fixtfdi (long double a1);

/* convert double to unsigned int */
DItype_x
__fixtfdi (long double a1)
{
    register union double_long dl1;
    register int exp;
    register UDItype_x l;

    dl1.d = a1;

    /* +/- 0, denormalized */
    if (!EXPD (dl1))
      return 0;

    /* The exponent - considered the binary point at the right end of
       the mantissa.  */
    exp = EXPD (dl1) - EXPONENT_BIAS - MANTISSA_BITS;

    /* number < 1: If the mantissa would need to be right-shifted more bits than
       its size the result would be zero.  */
    if (exp <= -PRECISION)
      return 0;

    /* NaN: All exponent bits set and a nonzero fraction.  */
    if ((EXPD(dl1) == 0x7fff) && !FRACD_ZERO_P (dl1))
      return 0x8000000000000000ULL;

    /* One extra bit is needed for the unit bit which is appended by
       MANTD_HIGH_LL on the left of the matissa.  */
    exp += HIGH_LL_FRAC_BITS + 1;

    /* If the result would still need a left shift it will be too large
       to be represented.  Compared to the unsigned variant we have to
       take care that there is still space for the sign bit to be
       applied.  So we can only go on if there is a right-shift by one
       or more.  */
    if (exp >= 0)
      {
	l = 1ULL << 63; /* long long min */
	return SIGND (dl1) ? l : l - 1;
      }

    l = MANTD_LOW_LL (dl1) >> (HIGH_LL_FRAC_BITS + 1)
        | MANTD_HIGH_LL (dl1) << (64 - (HIGH_LL_FRAC_BITS + 1));

    return SIGND (dl1) ? -(l >> -exp) : l >> -exp;
}
#define __fixtfdi ___fixtfdi
#endif
#undef L_fixtfdi

#ifdef L_fixunsdfdi
#define EXPD(fp)	(((fp.l.upper) >> 20) & 0x7FF)
#define EXCESSD		1022
#define SIGNBIT		0x80000000
#define SIGND(fp)	((fp.l.upper) & SIGNBIT)
#define MANTD_LL(fp)	((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
#define FRACD_LL(fp)	(fp.ll & (HIDDEND_LL-1))
#define HIDDEND_LL	((UDItype_x)1 << 52)

typedef int DItype_x __attribute__ ((mode (DI)));
typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
typedef int SItype_x __attribute__ ((mode (SI)));
typedef unsigned int USItype_x __attribute__ ((mode (SI)));

union double_long {
    double d;
    struct {
      SItype_x upper;
      USItype_x lower;
    } l;
    UDItype_x ll;
};

UDItype_x __fixunsdfdi (double a1);

/* convert double to unsigned int */
UDItype_x
__fixunsdfdi (double a1)
{
    register union double_long dl1;
    register int exp;
    register UDItype_x l;

    dl1.d = a1;

    /* +/- 0, denormalized, negative */

    if (!EXPD (dl1) || SIGND(dl1))
      return 0;

    exp = EXPD (dl1) - EXCESSD - 53;

    /* number < 1 */

    if (exp < -53)
      return 0;

    /* NaN */

    if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
      return 0x0ULL;

    /* Number big number & + inf */

    if (exp >= 12) {
      return 0xFFFFFFFFFFFFFFFFULL;
    }

    l = MANTD_LL(dl1);

    /* shift down until exp < 12 or l = 0 */
    if (exp > 0)
      l <<= exp;
    else 
      l >>= -exp;

    return l;
}
#define __fixunsdfdi ___fixunsdfdi
#endif
#undef L_fixunsdfdi

#ifdef L_fixdfdi
#define EXPD(fp)	(((fp.l.upper) >> 20) & 0x7FF)
#define EXCESSD		1022
#define SIGNBIT		0x80000000
#define SIGND(fp)	((fp.l.upper) & SIGNBIT)
#define MANTD_LL(fp)	((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
#define FRACD_LL(fp)	(fp.ll & (HIDDEND_LL-1))
#define HIDDEND_LL	((UDItype_x)1 << 52)

typedef int DItype_x __attribute__ ((mode (DI)));
typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
typedef int SItype_x __attribute__ ((mode (SI)));
typedef unsigned int USItype_x __attribute__ ((mode (SI)));

union double_long {
    double d;
    struct {
      SItype_x upper;
      USItype_x lower;
    } l;
    UDItype_x ll;
};

DItype_x __fixdfdi (double a1);

/* convert double to int */
DItype_x
__fixdfdi (double a1)
{
    register union double_long dl1;
    register int exp;
    register DItype_x l;

    dl1.d = a1;

    /* +/- 0, denormalized */

    if (!EXPD (dl1))
      return 0;

    exp = EXPD (dl1) - EXCESSD - 53;

    /* number < 1 */

    if (exp < -53)
      return 0;

    /* NaN */

    if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
      return 0x8000000000000000ULL;

    /* Number big number & +/- inf */

    if (exp >= 11) {
	l = (long long)1<<63;
	if (!SIGND(dl1))
	    l--;
	return l;
    }

    l = MANTD_LL(dl1);

    /* shift down until exp < 12 or l = 0 */
    if (exp > 0)
      l <<= exp;
    else 
      l >>= -exp;

    return (SIGND (dl1) ? -l : l);
}
#define __fixdfdi ___fixdfdi
#endif
#undef L_fixdfdi

#ifdef L_fixunssfdi
#define EXP(fp)         (((fp.l) >> 23) & 0xFF)
#define EXCESS          126
#define SIGNBIT         0x80000000
#define SIGN(fp)        ((fp.l) & SIGNBIT)
#define HIDDEN          (1 << 23)
#define MANT(fp)        (((fp.l) & 0x7FFFFF) | HIDDEN)
#define FRAC(fp)        ((fp.l) & 0x7FFFFF)

typedef int DItype_x __attribute__ ((mode (DI)));
typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
typedef int SItype_x __attribute__ ((mode (SI)));
typedef unsigned int USItype_x __attribute__ ((mode (SI)));

union float_long
  {
    float f;
    USItype_x l;
  };

UDItype_x __fixunssfdi (float a1);

/* convert float to unsigned int */
UDItype_x
__fixunssfdi (float a1)
{
    register union float_long fl1;
    register int exp;
    register UDItype_x l;

    fl1.f = a1;

    /* +/- 0, denormalized, negative */

    if (!EXP (fl1) || SIGN(fl1))
      return 0;

    exp = EXP (fl1) - EXCESS - 24;

    /* number < 1 */

    if (exp < -24)
      return 0;

    /* NaN */

    if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
      return 0x0ULL;

    /* Number big number & + inf */

    if (exp >= 41) {
      return 0xFFFFFFFFFFFFFFFFULL;
    }

    l = MANT(fl1);

    if (exp > 0)
      l <<= exp;
    else 
      l >>= -exp;

    return l;
}
#define __fixunssfdi ___fixunssfdi
#endif
#undef L_fixunssfdi

#ifdef L_fixsfdi
#define EXP(fp)         (((fp.l) >> 23) & 0xFF)
#define EXCESS          126
#define SIGNBIT         0x80000000
#define SIGN(fp)        ((fp.l) & SIGNBIT)
#define HIDDEN          (1 << 23)
#define MANT(fp)        (((fp.l) & 0x7FFFFF) | HIDDEN)
#define FRAC(fp)        ((fp.l) & 0x7FFFFF)

typedef int DItype_x __attribute__ ((mode (DI)));
typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
typedef int SItype_x __attribute__ ((mode (SI)));
typedef unsigned int USItype_x __attribute__ ((mode (SI)));

union float_long
  {
    float f;
    USItype_x l;
  };

DItype_x __fixsfdi (float a1);

/* convert double to int */
DItype_x
__fixsfdi (float a1)
{
    register union float_long fl1;
    register int exp;
    register DItype_x l;

    fl1.f = a1;

    /* +/- 0, denormalized */

    if (!EXP (fl1))
      return 0;

    exp = EXP (fl1) - EXCESS - 24;

    /* number < 1 */

    if (exp < -24)
      return 0;

    /* NaN */

    if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
      return 0x8000000000000000ULL;

    /* Number big number & +/- inf */

    if (exp >= 40) {
	l = (long long)1<<63;
	if (!SIGN(fl1))
	    l--;
	return l;
    }

    l = MANT(fl1);

    if (exp > 0)
      l <<= exp;
    else 
      l >>= -exp;

    return (SIGN (fl1) ? -l : l);
}
#define __fixsfdi ___fixsfdi
#endif
#undef L_fixsfdi