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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [config/] [s390/] [fixdfdi.h] - Rev 310
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/* Definitions of target machine for GNU compiler, for IBM S/390 Copyright (C) 1999, 2000, 2001, 2007 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; /* If the upper ll part of the mantissa isn't zeroed out after shifting the number would be to large. */ if (exp >= -HIGH_LL_FRAC_BITS) return 0xFFFFFFFFFFFFFFFFULL; exp += HIGH_LL_FRAC_BITS + 1; 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; DItype_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; /* If the upper ll part of the mantissa isn't zeroed out after shifting the number would be to large. */ if (exp >= -HIGH_LL_FRAC_BITS) { l = (long long)1 << 63; /* long int min */ return SIGND (dl1) ? l : l - 1; } /* The extra bit is needed for the sign bit. */ exp += HIGH_LL_FRAC_BITS + 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
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