458 lines
11 KiB
C
458 lines
11 KiB
C
/* Definitions of target machine for GNU compiler, for IBM S/390
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Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
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Contributed by Hartmut Penner (hpenner@de.ibm.com) and
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Ulrich Weigand (uweigand@de.ibm.com).
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#ifdef L_fixunstfdi
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#define EXPD(fp) (((fp.l.i[0]) >> 16) & 0x7FFF)
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#define EXPONENT_BIAS 16383
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#define MANTISSA_BITS 112
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#define PRECISION (MANTISSA_BITS + 1)
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#define SIGNBIT 0x80000000
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#define SIGND(fp) ((fp.l.i[0]) & SIGNBIT)
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#define MANTD_HIGH_LL(fp) ((fp.ll[0] & HIGH_LL_FRAC_MASK) | HIGH_LL_UNIT_BIT)
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#define MANTD_LOW_LL(fp) (fp.ll[1])
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#define FRACD_ZERO_P(fp) (!fp.ll[1] && !(fp.ll[0] & HIGH_LL_FRAC_MASK))
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#define HIGH_LL_FRAC_BITS 48
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#define HIGH_LL_UNIT_BIT ((UDItype_x)1 << HIGH_LL_FRAC_BITS)
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#define HIGH_LL_FRAC_MASK (HIGH_LL_UNIT_BIT - 1)
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typedef int DItype_x __attribute__ ((mode (DI)));
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typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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typedef int SItype_x __attribute__ ((mode (SI)));
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typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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union double_long {
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long double d;
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struct {
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SItype_x i[4]; /* 32 bit parts: 0 upper ... 3 lowest */
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} l;
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UDItype_x ll[2]; /* 64 bit parts: 0 upper, 1 lower */
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};
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UDItype_x __fixunstfdi (long double a1);
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/* convert double to unsigned int */
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UDItype_x
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__fixunstfdi (long double a1)
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{
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register union double_long dl1;
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register int exp;
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register UDItype_x l;
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dl1.d = a1;
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/* +/- 0, denormalized, negative */
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if (!EXPD (dl1) || SIGND(dl1))
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return 0;
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/* The exponent - considered the binary point at the right end of
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the mantissa. */
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exp = EXPD (dl1) - EXPONENT_BIAS - MANTISSA_BITS;
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/* number < 1: If the mantissa would need to be right-shifted more bits than
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its size (plus the implied one bit on the left) the result would be
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zero. */
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if (exp <= -PRECISION)
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return 0;
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/* NaN: All exponent bits set and a nonzero fraction. */
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if ((EXPD(dl1) == 0x7fff) && !FRACD_ZERO_P (dl1))
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return 0x0ULL;
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/* If the upper ll part of the mantissa isn't
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zeroed out after shifting the number would be to large. */
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if (exp >= -HIGH_LL_FRAC_BITS)
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return 0xFFFFFFFFFFFFFFFFULL;
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exp += HIGH_LL_FRAC_BITS + 1;
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l = MANTD_LOW_LL (dl1) >> (HIGH_LL_FRAC_BITS + 1)
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| MANTD_HIGH_LL (dl1) << (64 - (HIGH_LL_FRAC_BITS + 1));
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return l >> -exp;
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}
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#define __fixunstfdi ___fixunstfdi
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#endif
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#undef L_fixunstfdi
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#ifdef L_fixtfdi
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#define EXPD(fp) (((fp.l.i[0]) >> 16) & 0x7FFF)
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#define EXPONENT_BIAS 16383
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#define MANTISSA_BITS 112
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#define PRECISION (MANTISSA_BITS + 1)
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#define SIGNBIT 0x80000000
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#define SIGND(fp) ((fp.l.i[0]) & SIGNBIT)
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#define MANTD_HIGH_LL(fp) ((fp.ll[0] & HIGH_LL_FRAC_MASK) | HIGH_LL_UNIT_BIT)
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#define MANTD_LOW_LL(fp) (fp.ll[1])
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#define FRACD_ZERO_P(fp) (!fp.ll[1] && !(fp.ll[0] & HIGH_LL_FRAC_MASK))
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#define HIGH_LL_FRAC_BITS 48
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#define HIGH_LL_UNIT_BIT ((UDItype_x)1 << HIGH_LL_FRAC_BITS)
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#define HIGH_LL_FRAC_MASK (HIGH_LL_UNIT_BIT - 1)
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typedef int DItype_x __attribute__ ((mode (DI)));
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typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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typedef int SItype_x __attribute__ ((mode (SI)));
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typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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union double_long {
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long double d;
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struct {
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SItype_x i[4]; /* 32 bit parts: 0 upper ... 3 lowest */
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} l;
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DItype_x ll[2]; /* 64 bit parts: 0 upper, 1 lower */
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};
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DItype_x __fixtfdi (long double a1);
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/* convert double to unsigned int */
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DItype_x
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__fixtfdi (long double a1)
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{
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register union double_long dl1;
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register int exp;
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register UDItype_x l;
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dl1.d = a1;
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/* +/- 0, denormalized */
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if (!EXPD (dl1))
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return 0;
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/* The exponent - considered the binary point at the right end of
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the mantissa. */
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exp = EXPD (dl1) - EXPONENT_BIAS - MANTISSA_BITS;
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/* number < 1: If the mantissa would need to be right-shifted more bits than
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its size the result would be zero. */
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if (exp <= -PRECISION)
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return 0;
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/* NaN: All exponent bits set and a nonzero fraction. */
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if ((EXPD(dl1) == 0x7fff) && !FRACD_ZERO_P (dl1))
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return 0x8000000000000000ULL;
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/* If the upper ll part of the mantissa isn't
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zeroed out after shifting the number would be to large. */
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if (exp >= -HIGH_LL_FRAC_BITS)
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{
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l = (long long)1 << 63; /* long int min */
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return SIGND (dl1) ? l : l - 1;
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}
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/* The extra bit is needed for the sign bit. */
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exp += HIGH_LL_FRAC_BITS + 1;
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l = MANTD_LOW_LL (dl1) >> (HIGH_LL_FRAC_BITS + 1)
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| MANTD_HIGH_LL (dl1) << (64 - (HIGH_LL_FRAC_BITS + 1));
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return SIGND (dl1) ? -(l >> -exp) : l >> -exp;
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}
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#define __fixtfdi ___fixtfdi
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#endif
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#undef L_fixtfdi
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#ifdef L_fixunsdfdi
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#define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
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#define EXCESSD 1022
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#define SIGNBIT 0x80000000
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#define SIGND(fp) ((fp.l.upper) & SIGNBIT)
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#define MANTD_LL(fp) ((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
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#define FRACD_LL(fp) (fp.ll & (HIDDEND_LL-1))
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#define HIDDEND_LL ((UDItype_x)1 << 52)
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typedef int DItype_x __attribute__ ((mode (DI)));
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typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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typedef int SItype_x __attribute__ ((mode (SI)));
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typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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union double_long {
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double d;
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struct {
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SItype_x upper;
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USItype_x lower;
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} l;
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UDItype_x ll;
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};
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UDItype_x __fixunsdfdi (double a1);
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/* convert double to unsigned int */
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UDItype_x
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__fixunsdfdi (double a1)
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{
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register union double_long dl1;
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register int exp;
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register UDItype_x l;
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dl1.d = a1;
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/* +/- 0, denormalized, negative */
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if (!EXPD (dl1) || SIGND(dl1))
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return 0;
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exp = EXPD (dl1) - EXCESSD - 53;
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/* number < 1 */
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if (exp < -53)
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return 0;
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/* NaN */
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if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
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return 0x0ULL;
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/* Number big number & + inf */
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if (exp >= 12) {
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return 0xFFFFFFFFFFFFFFFFULL;
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}
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l = MANTD_LL(dl1);
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/* shift down until exp < 12 or l = 0 */
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if (exp > 0)
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l <<= exp;
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else
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l >>= -exp;
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return l;
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}
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#define __fixunsdfdi ___fixunsdfdi
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#endif
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#undef L_fixunsdfdi
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#ifdef L_fixdfdi
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#define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
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#define EXCESSD 1022
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#define SIGNBIT 0x80000000
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#define SIGND(fp) ((fp.l.upper) & SIGNBIT)
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#define MANTD_LL(fp) ((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
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#define FRACD_LL(fp) (fp.ll & (HIDDEND_LL-1))
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#define HIDDEND_LL ((UDItype_x)1 << 52)
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typedef int DItype_x __attribute__ ((mode (DI)));
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typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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typedef int SItype_x __attribute__ ((mode (SI)));
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typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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union double_long {
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double d;
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struct {
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SItype_x upper;
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USItype_x lower;
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} l;
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UDItype_x ll;
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};
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DItype_x __fixdfdi (double a1);
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/* convert double to int */
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DItype_x
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__fixdfdi (double a1)
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{
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register union double_long dl1;
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register int exp;
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register DItype_x l;
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dl1.d = a1;
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/* +/- 0, denormalized */
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if (!EXPD (dl1))
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return 0;
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exp = EXPD (dl1) - EXCESSD - 53;
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/* number < 1 */
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if (exp < -53)
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return 0;
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/* NaN */
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if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
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return 0x8000000000000000ULL;
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/* Number big number & +/- inf */
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if (exp >= 11) {
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l = (long long)1<<63;
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if (!SIGND(dl1))
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l--;
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return l;
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}
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l = MANTD_LL(dl1);
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/* shift down until exp < 12 or l = 0 */
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if (exp > 0)
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l <<= exp;
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else
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l >>= -exp;
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return (SIGND (dl1) ? -l : l);
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}
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#define __fixdfdi ___fixdfdi
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#endif
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#undef L_fixdfdi
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#ifdef L_fixunssfdi
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#define EXP(fp) (((fp.l) >> 23) & 0xFF)
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#define EXCESS 126
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#define SIGNBIT 0x80000000
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#define SIGN(fp) ((fp.l) & SIGNBIT)
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#define HIDDEN (1 << 23)
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#define MANT(fp) (((fp.l) & 0x7FFFFF) | HIDDEN)
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#define FRAC(fp) ((fp.l) & 0x7FFFFF)
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typedef int DItype_x __attribute__ ((mode (DI)));
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typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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typedef int SItype_x __attribute__ ((mode (SI)));
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typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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union float_long
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{
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float f;
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USItype_x l;
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};
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UDItype_x __fixunssfdi (float a1);
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/* convert float to unsigned int */
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UDItype_x
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__fixunssfdi (float a1)
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{
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register union float_long fl1;
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register int exp;
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register UDItype_x l;
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fl1.f = a1;
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/* +/- 0, denormalized, negative */
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if (!EXP (fl1) || SIGN(fl1))
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return 0;
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exp = EXP (fl1) - EXCESS - 24;
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/* number < 1 */
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if (exp < -24)
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return 0;
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/* NaN */
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if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
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return 0x0ULL;
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/* Number big number & + inf */
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if (exp >= 41) {
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return 0xFFFFFFFFFFFFFFFFULL;
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}
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l = MANT(fl1);
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if (exp > 0)
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l <<= exp;
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else
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l >>= -exp;
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return l;
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}
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#define __fixunssfdi ___fixunssfdi
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#endif
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#undef L_fixunssfdi
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#ifdef L_fixsfdi
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#define EXP(fp) (((fp.l) >> 23) & 0xFF)
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#define EXCESS 126
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#define SIGNBIT 0x80000000
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#define SIGN(fp) ((fp.l) & SIGNBIT)
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#define HIDDEN (1 << 23)
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#define MANT(fp) (((fp.l) & 0x7FFFFF) | HIDDEN)
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#define FRAC(fp) ((fp.l) & 0x7FFFFF)
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typedef int DItype_x __attribute__ ((mode (DI)));
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typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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typedef int SItype_x __attribute__ ((mode (SI)));
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typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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union float_long
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{
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float f;
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USItype_x l;
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};
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DItype_x __fixsfdi (float a1);
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/* convert double to int */
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DItype_x
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__fixsfdi (float a1)
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{
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register union float_long fl1;
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register int exp;
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register DItype_x l;
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fl1.f = a1;
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/* +/- 0, denormalized */
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if (!EXP (fl1))
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return 0;
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exp = EXP (fl1) - EXCESS - 24;
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/* number < 1 */
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if (exp < -24)
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return 0;
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/* NaN */
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if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
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return 0x8000000000000000ULL;
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/* Number big number & +/- inf */
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if (exp >= 40) {
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l = (long long)1<<63;
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if (!SIGN(fl1))
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l--;
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return l;
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}
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l = MANT(fl1);
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if (exp > 0)
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l <<= exp;
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else
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l >>= -exp;
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return (SIGN (fl1) ? -l : l);
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}
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#define __fixsfdi ___fixsfdi
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#endif
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#undef L_fixsfdi
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