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/* Definitions of target machine for GNU compiler, for IBM S/390
Copyright (C) 1999-2022 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __s390x__
#define EXPONENT_BIAS 127
#define MANTISSA_BITS 23
#define EXP(fp) (((fp.l) >> MANTISSA_BITS) & 0xFF)
#define SIGNBIT 0x80000000
#define SIGN(fp) ((fp.l) & SIGNBIT)
#define HIDDEN (1 << MANTISSA_BITS)
#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;
};
static __inline__ void
fexceptdiv (float d, float e)
{
__asm__ __volatile__ ("debr %0,%1" : : "f" (d), "f" (e) );
}
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 */
if (!EXP (fl1))
return 0;
/* Negative. */
if (SIGN (fl1))
{
/* Value is <= -1.0
C99 Annex F.4 requires an "invalid" exception to be thrown. */
if (EXP (fl1) >= EXPONENT_BIAS)
fexceptdiv (0.0, 0.0);
return 0;
}
exp = EXP (fl1) - EXPONENT_BIAS - MANTISSA_BITS;
/* number < 1 */
if (exp < -24)
return 0;
/* NaN */
if ((EXP (fl1) == 0xff) && (FRAC (fl1) != 0)) /* NaN */
{
/* C99 Annex F.4 requires an "invalid" exception to be thrown. */
fexceptdiv (0.0, 0.0);
return 0x0ULL;
}
/* Number big number & + inf */
if (exp >= 41)
{
/* C99 Annex F.4 requires an "invalid" exception to be thrown. */
fexceptdiv (0.0, 0.0);
return 0xFFFFFFFFFFFFFFFFULL;
}
l = MANT (fl1);
if (exp > 0)
l <<= exp;
else
l >>= -exp;
return l;
}
#endif /* !__s390x__ */
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