From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libgfortran/generated/pow_c4_i4.c | 75 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 libgfortran/generated/pow_c4_i4.c (limited to 'libgfortran/generated/pow_c4_i4.c') diff --git a/libgfortran/generated/pow_c4_i4.c b/libgfortran/generated/pow_c4_i4.c new file mode 100644 index 000000000..b5cc430c6 --- /dev/null +++ b/libgfortran/generated/pow_c4_i4.c @@ -0,0 +1,75 @@ +/* Support routines for the intrinsic power (**) operator. + Copyright 2004, 2007, 2009 Free Software Foundation, Inc. + Contributed by Paul Brook + +This file is part of the GNU Fortran 95 runtime library (libgfortran). + +Libgfortran 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 of the License, or (at your option) any later version. + +Libgfortran 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 +. */ + +#include "libgfortran.h" + + +/* Use Binary Method to calculate the powi. This is not an optimal but + a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of + Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art + of Computer Programming", 3rd Edition, 1998. */ + +#if defined (HAVE_GFC_COMPLEX_4) && defined (HAVE_GFC_INTEGER_4) + +GFC_COMPLEX_4 pow_c4_i4 (GFC_COMPLEX_4 a, GFC_INTEGER_4 b); +export_proto(pow_c4_i4); + +GFC_COMPLEX_4 +pow_c4_i4 (GFC_COMPLEX_4 a, GFC_INTEGER_4 b) +{ + GFC_COMPLEX_4 pow, x; + GFC_INTEGER_4 n; + GFC_UINTEGER_4 u; + + n = b; + x = a; + pow = 1; + if (n != 0) + { + if (n < 0) + { + + u = -n; + x = pow / x; + } + else + { + u = n; + } + for (;;) + { + if (u & 1) + pow *= x; + u >>= 1; + if (u) + x *= x; + else + break; + } + } + return pow; +} + +#endif -- cgit v1.2.3