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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/config/rs6000/ppc64-fp.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/config/rs6000/ppc64-fp.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/config/rs6000/ppc64-fp.c b/gcc-4.2.1-5666.3/gcc/config/rs6000/ppc64-fp.c new file mode 100644 index 000000000..184f34e1d --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/config/rs6000/ppc64-fp.c @@ -0,0 +1,243 @@ +/* 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 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 2, or (at your option) any later +version. + +In addition to the permissions in the GNU General Public License, the +Free Software Foundation gives you unlimited permission to link the +compiled version of this file into combinations with other programs, +and to distribute those combinations without any restriction coming +from the use of this file. (The General Public License restrictions +do apply in other respects; for example, they cover modification of +the file, and distribution when not linked into a combine +executable.) + +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 COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + +#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__ */ |