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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 PRECISION (MANTISSA_BITS + 1)
#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)
#define LLONG_MAX 9223372036854775807LL
#define LLONG_MIN (-LLONG_MAX - 1LL)
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) );
}
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) - EXPONENT_BIAS - MANTISSA_BITS;
/* number < 1 */
if (exp <= -PRECISION)
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 0x8000000000000000ULL;
}
/* Number big number & +/- inf */
if (exp >= 40) {
/* Don't throw an exception for -1p+63 */
if (!SIGN (fl1) || exp > 40 || FRAC (fl1) != 0)
/* C99 Annex F.4 requires an "invalid" exception to be thrown. */
fexceptdiv (0.0, 0.0);
return SIGN (fl1) ? LLONG_MIN : LLONG_MAX;
}
l = MANT (fl1);
if (exp > 0)
l <<= exp;
else
l >>= -exp;
return (SIGN (fl1) ? -l : l);
}
#endif /* !__s390x__ */
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