diff options
author | Bernhard Schommer <bernhardschommer@gmail.com> | 2015-02-19 16:24:28 +0100 |
---|---|---|
committer | Bernhard Schommer <bernhardschommer@gmail.com> | 2015-02-19 16:24:28 +0100 |
commit | e51ffb6c1d9411515facc5e97a4e8dba5d8b55ab (patch) | |
tree | 80a7fc8212d28712365082e1a2a2d0fa28cedad3 /runtime/c/i64_stod.c | |
parent | c130f4936bad11fd6dab3a5d142b870d2a5f650c (diff) | |
parent | b0eb1dfc9fd7b15c556c49101390d882b0f00f8a (diff) | |
download | compcert-e51ffb6c1d9411515facc5e97a4e8dba5d8b55ab.tar.gz compcert-e51ffb6c1d9411515facc5e97a4e8dba5d8b55ab.zip |
Merge branch 'master' into no-shell
Diffstat (limited to 'runtime/c/i64_stod.c')
-rw-r--r-- | runtime/c/i64_stod.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/runtime/c/i64_stod.c b/runtime/c/i64_stod.c new file mode 100644 index 00000000..158b6892 --- /dev/null +++ b/runtime/c/i64_stod.c @@ -0,0 +1,46 @@ +/***************************************************************** + * + * The Compcert verified compiler + * + * Xavier Leroy, INRIA Paris-Rocquencourt + * + * Copyright (c) 2013 Institut National de Recherche en Informatique et + * en Automatique. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the <organization> nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT + * HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + **********************************************************************/ + +/* Helper functions for 64-bit integer arithmetic. Reference C implementation */ + +#include "i64.h" + +/* Conversion from signed int64 to float64 */ + +double __i64_stod(signed long long x) +{ + unsigned xl = x; + signed xh = x >> 32; + return (double) xl + 0x1p+32 * (double) xh; +} |