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author | Ben Cheng <bccheng@google.com> | 2013-03-28 11:14:20 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2013-03-28 12:40:33 -0700 |
commit | af0c51ac87ab2a87caa03fa108f0d164987a2764 (patch) | |
tree | 4b8b470f7c5b69642fdab8d0aa1fbc148d02196b /gcc-4.8/gcc/config/sh/divtab-sh4-300.c | |
parent | d87cae247d39ebf4f5a6bf25c932a14d2fdb9384 (diff) | |
download | toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.tar.gz toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.tar.bz2 toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.zip |
[GCC 4.8] Initial check-in of GCC 4.8.0
Change-Id: I0719d8a6d0f69b367a6ab6f10eb75622dbf12771
Diffstat (limited to 'gcc-4.8/gcc/config/sh/divtab-sh4-300.c')
-rw-r--r-- | gcc-4.8/gcc/config/sh/divtab-sh4-300.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/gcc-4.8/gcc/config/sh/divtab-sh4-300.c b/gcc-4.8/gcc/config/sh/divtab-sh4-300.c new file mode 100644 index 000000000..d4a494417 --- /dev/null +++ b/gcc-4.8/gcc/config/sh/divtab-sh4-300.c @@ -0,0 +1,77 @@ +/* Copyright (C) 2004-2013 Free Software Foundation, Inc. + +This file 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. + +This file 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/>. */ + + +/* Calculate division table for ST40-300 integer division + Contributed by Joern Rennecke + joern.rennecke@st.com */ + +#include <stdio.h> +#include <math.h> + +int +main () +{ + int i, j; + double q, r, err, max_err = 0, max_s_err = 0; + + puts("/* This table has been generated by divtab-sh4.c. */"); + puts ("\t.balign 4"); + for (i = -128; i < 128; i++) + { + int n = 0; + if (i == 0) + { + /* output some dummy number for 1/0. */ + puts ("LOCAL(div_table_clz):\n\t.byte\t0"); + continue; + } + for (j = i < 0 ? -i : i; j < 128; j += j) + n++; + printf ("\t.byte\t%d\n", n - 7); + } + puts("\ +/* 1/-128 .. 1/127, normalized. There is an implicit leading 1 in bit 32,\n\ + or in bit 33 for powers of two. */\n\ + .balign 4"); + for (i = -128; i < 128; i++) + { + if (i == 0) + { + puts ("LOCAL(div_table_inv):\n\t.long\t0x0"); + continue; + } + j = i < 0 ? -i : i; + while (j < 64) + j += j; + q = 4.*(1<<30)*128/j; + r = ceil (q); + printf ("\t.long\t0x%X\n", (unsigned) r); + err = r - q; + if (err > max_err) + max_err = err; + err = err * j / 128; + if (err > max_s_err) + max_s_err = err; + } + printf ("\t/* maximum error: %f scaled: %f*/\n", max_err, max_s_err); + exit (0); +} |