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author | Xavier Leroy <xavier.leroy@inria.fr> | 2015-03-14 10:35:25 +0100 |
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committer | Xavier Leroy <xavier.leroy@inria.fr> | 2015-03-14 10:35:25 +0100 |
commit | 890141acb930bdb6f985244f81833331382f7b66 (patch) | |
tree | cc32d6be06feaebca5076727f5531959e8e37530 /runtime/c/i64_sdiv.c | |
parent | 67e8b783c7e794d995675a332f118533e6a9b14a (diff) | |
parent | 3e01154d693e1c457e1e974f5e9ebaa4601050aa (diff) | |
download | compcert-890141acb930bdb6f985244f81833331382f7b66.tar.gz compcert-890141acb930bdb6f985244f81833331382f7b66.zip |
Merge branch 'master' into struct-passing
Diffstat (limited to 'runtime/c/i64_sdiv.c')
-rw-r--r-- | runtime/c/i64_sdiv.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/runtime/c/i64_sdiv.c b/runtime/c/i64_sdiv.c new file mode 100644 index 00000000..3f21d9b7 --- /dev/null +++ b/runtime/c/i64_sdiv.c @@ -0,0 +1,51 @@ +/***************************************************************** + * + * 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" + +/* Signed division */ + +signed long long __i64_sdiv(signed long long n, signed long long d) +{ + unsigned long long un, ud, uq, ur; + int nh = n >> 32, dh = d >> 32; + /* Take absolute values of n and d */ + un = nh < 0 ? -n : n; + ud = dh < 0 ? -d : d; + uq = __i64_udivmod(un, ud, &ur); + /* Apply sign to quotient */ + return (nh ^ dh) < 0 ? -uq : uq; +} |