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author | Jakub Jelinek <jakub@redhat.com> | 2011-01-16 17:44:35 +0100 |
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committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-01-16 17:44:35 +0100 |
commit | dbc9f6c6ee8decb40aed6c790ebe4337b52a37df (patch) | |
tree | cbbd98da06ef06f334e26d4cd08eea03e60befdb /libquadmath/math/lrintq.c | |
parent | fa23b182095ab7bd85605c62f2209c439b8a8018 (diff) | |
download | gcc-dbc9f6c6ee8decb40aed6c790ebe4337b52a37df.zip gcc-dbc9f6c6ee8decb40aed6c790ebe4337b52a37df.tar.gz gcc-dbc9f6c6ee8decb40aed6c790ebe4337b52a37df.tar.bz2 |
re PR fortran/46416 (libquadmath: missing functions)
PR fortran/46416
* quadmath.h (cbrtq, finiteq, isnanq, signbitq, sqrtq): Remove
const from prototype argument.
(cimagq, conjq, cprojq, crealq, fdimq, fmaxq, fminq, ilogbq,
llrintq, log2q, lrintq, nearbyintq, remquoq): New prototypes.
(__quadmath_extern_inline): Define.
(cimagq, conjq, crealq): New inlines.
* Makefile.am (libquadmath_la_SOURCES): Add math/cimagq.c,
math/conjq.c, math/cprojq.c, math/crealq.c, math/fdimq.c,
math/fmaxq.c, math/fminq.c, math/ilogbq.c, math/llrintq.c,
math/log2q.c, math/lrintq.c, math/nearbyintq.c and math/remquoq.c.
* Makefile.in: Regenerated.
* quadmath_weak.h (cimagq, conjq, cprojq, crealq, fdimq, fmaxq,
fminq, ilogbq, llrintq, log2q, lrintq, nearbyintq, remquoq): Add.
* quadmath-imp.h (__LITTLE_ENDIAN__): Don't define.
(ieee854_float128): Use __BYTE_ORDER == __ORDER_BIG_ENDIAN__
tests instead of __BIG_ENDIAN__.
* quadmath.map (QUADMATH_1.0): Add cimagq, conjq, cprojq, crealq,
fdimq, fmaxq, fminq, ilogbq, llrintq, log2q, lrintq, nearbyintq
and remquoq.
* libquadmath.texi (cimagq, conjq, cprojq, crealq, fdimq, fmaxq,
fminq, ilogbq, llrintq, log2q, lrintq, nearbyintq, remquoq): Add.
* math/cprojq.c: New file.
* math/ilogbq.c: New file.
* math/fminq.c: New file.
* math/llrintq.c: New file.
* math/log2q.c: New file.
* math/lrintq.c: New file.
* math/crealq.c: New file.
* math/nearbyintq.c: New file.
* math/fmaxq.c: New file.
* math/conjq.c: New file.
* math/remquoq.c: New file.
* math/cimagq.c: New file.
* math/fdimq.c: New file.
* math/ldexpq.c: Include errno.h. Set errno to ERANGE if needed.
From-SVN: r168854
Diffstat (limited to 'libquadmath/math/lrintq.c')
-rw-r--r-- | libquadmath/math/lrintq.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/libquadmath/math/lrintq.c b/libquadmath/math/lrintq.c new file mode 100644 index 0000000..d1497ae --- /dev/null +++ b/libquadmath/math/lrintq.c @@ -0,0 +1,85 @@ +/* Round argument to nearest integral value according to current rounding + direction. + Copyright (C) 1997, 1999, 2004, 2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and + Jakub Jelinek <jj@ultra.linux.cz>, 1999. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include "quadmath-imp.h" + +static const __float128 two112[2] = +{ + 5.19229685853482762853049632922009600E+33Q, /* 0x406F000000000000, 0 */ + -5.19229685853482762853049632922009600E+33Q /* 0xC06F000000000000, 0 */ +}; + +long int +lrintq (__float128 x) +{ + int32_t j0; + uint64_t i0,i1; + volatile __float128 w; + __float128 t; + long int result; + int sx; + + GET_FLT128_WORDS64 (i0, i1, x); + j0 = ((i0 >> 48) & 0x7fff) - 0x3fff; + sx = i0 >> 63; + i0 &= 0x0000ffffffffffffLL; + i0 |= 0x0001000000000000LL; + + if (j0 < 48) + { + w = two112[sx] + x; + t = w - two112[sx]; + GET_FLT128_WORDS64 (i0, i1, t); + j0 = ((i0 >> 48) & 0x7fff) - 0x3fff; + i0 &= 0x0000ffffffffffffLL; + i0 |= 0x0001000000000000LL; + + result = (j0 < 0 ? 0 : i0 >> (48 - j0)); + } + else if (j0 < (int32_t) (8 * sizeof (long int)) - 1) + { + if (j0 >= 112) + result = ((long int) i0 << (j0 - 48)) | (i1 << (j0 - 112)); + else + { + w = two112[sx] + x; + t = w - two112[sx]; + GET_FLT128_WORDS64 (i0, i1, t); + j0 = ((i0 >> 48) & 0x7fff) - 0x3fff; + i0 &= 0x0000ffffffffffffLL; + i0 |= 0x0001000000000000LL; + + if (j0 == 48) + result = (long int) i0; + else + result = ((long int) i0 << (j0 - 48)) | (i1 >> (112 - j0)); + } + } + else + { + /* The number is too large. It is left implementation defined + what happens. */ + return (long int) x; + } + + return sx ? -result : result; +} |