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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [rs6000/] [ppc64-fp.c] - Rev 282
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/* Functions needed for soft-float on powerpc64-linux, copied from libgcc2.c with macros expanded to force the use of specific types. Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006, 2009 Free Software Foundation, Inc. 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/>. */ #if defined(__powerpc64__) || defined (__64BIT__) || defined(__ppc64__) #define TMODES #include "config/fp-bit.h" extern DItype __fixtfdi (TFtype); extern DItype __fixdfdi (DFtype); extern DItype __fixsfdi (SFtype); extern USItype __fixunsdfsi (DFtype); extern USItype __fixunssfsi (SFtype); extern TFtype __floatditf (DItype); extern TFtype __floatunditf (UDItype); extern DFtype __floatdidf (DItype); extern DFtype __floatundidf (UDItype); extern SFtype __floatdisf (DItype); extern SFtype __floatundisf (UDItype); extern DItype __fixunstfdi (TFtype); static DItype local_fixunssfdi (SFtype); static DItype local_fixunsdfdi (DFtype); DItype __fixtfdi (TFtype a) { if (a < 0) return - __fixunstfdi (-a); return __fixunstfdi (a); } DItype __fixdfdi (DFtype a) { if (a < 0) return - local_fixunsdfdi (-a); return local_fixunsdfdi (a); } DItype __fixsfdi (SFtype a) { if (a < 0) return - local_fixunssfdi (-a); return local_fixunssfdi (a); } USItype __fixunsdfsi (DFtype a) { if (a >= - (DFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) - (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1); return (SItype) a; } USItype __fixunssfsi (SFtype a) { if (a >= - (SFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) - (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1); return (SItype) a; } TFtype __floatditf (DItype u) { DFtype dh, dl; dh = (SItype) (u >> (sizeof (SItype) * 8)); dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); return (TFtype) dh + (TFtype) dl; } TFtype __floatunditf (UDItype u) { DFtype dh, dl; dh = (USItype) (u >> (sizeof (SItype) * 8)); dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); return (TFtype) dh + (TFtype) dl; } DFtype __floatdidf (DItype u) { DFtype d; d = (SItype) (u >> (sizeof (SItype) * 8)); d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); return d; } DFtype __floatundidf (UDItype u) { DFtype d; d = (USItype) (u >> (sizeof (SItype) * 8)); d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); return d; } SFtype __floatdisf (DItype u) { DFtype f; if (53 < (sizeof (DItype) * 8) && 53 > ((sizeof (DItype) * 8) - 53 + 24)) { if (! (- ((DItype) 1 << 53) < u && u < ((DItype) 1 << 53))) { if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1)) { u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1); u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53)); } } } f = (SItype) (u >> (sizeof (SItype) * 8)); f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); return (SFtype) f; } SFtype __floatundisf (UDItype u) { DFtype f; if (53 < (sizeof (DItype) * 8) && 53 > ((sizeof (DItype) * 8) - 53 + 24)) { if (u >= ((UDItype) 1 << 53)) { if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1)) { u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1); u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53)); } } } f = (USItype) (u >> (sizeof (SItype) * 8)); f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); return (SFtype) f; } DItype __fixunstfdi (TFtype a) { if (a < 0) return 0; /* Compute high word of result, as a flonum. */ const TFtype b = (a / (((UDItype) 1) << (sizeof (SItype) * 8))); /* Convert that to fixed (but not to DItype!), and shift it into the high word. */ UDItype v = (USItype) b; v <<= (sizeof (SItype) * 8); /* Remove high part from the TFtype, leaving the low part as flonum. */ a -= (TFtype) v; /* Convert that to fixed (but not to DItype!) and add it in. Sometimes A comes out negative. This is significant, since A has more bits than a long int does. */ if (a < 0) v -= (USItype) (-a); else v += (USItype) a; return v; } /* This version is needed to prevent recursion; fixunsdfdi in libgcc calls fixdfdi, which in turn calls calls fixunsdfdi. */ static DItype local_fixunsdfdi (DFtype a) { USItype hi, lo; hi = a / (((UDItype) 1) << (sizeof (SItype) * 8)); lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8))); return ((UDItype) hi << (sizeof (SItype) * 8)) | lo; } /* This version is needed to prevent recursion; fixunssfdi in libgcc calls fixsfdi, which in turn calls calls fixunssfdi. */ static DItype local_fixunssfdi (SFtype original_a) { DFtype a = original_a; USItype hi, lo; hi = a / (((UDItype) 1) << (sizeof (SItype) * 8)); lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8))); return ((UDItype) hi << (sizeof (SItype) * 8)) | lo; } #endif /* __powerpc64__ */