From e5362a794d813e0c4fb7a8a680a915eb57deaa7f Mon Sep 17 00:00:00 2001 From: xleroy Date: Sat, 20 Apr 2013 15:07:00 +0000 Subject: Split arch/int64.s into one file per function. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2206 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e --- runtime/ia32/i64_scmp.s | 61 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 runtime/ia32/i64_scmp.s (limited to 'runtime/ia32/i64_scmp.s') diff --git a/runtime/ia32/i64_scmp.s b/runtime/ia32/i64_scmp.s new file mode 100644 index 00000000..e008f8d6 --- /dev/null +++ b/runtime/ia32/i64_scmp.s @@ -0,0 +1,61 @@ +# ***************************************************************** +# +# 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 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 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. IA32 version. + + .text + +# Signed comparison + + .globl __i64_scmp + .balign 16 +__i64_scmp: + movl 8(%esp), %eax # compare high words (signed) + cmpl 16(%esp), %eax + je 1f # if different, + setg %al # extract result + setl %dl + subb %dl, %al + movsbl %al, %eax + ret +1: movl 4(%esp), %eax # if high words equal, + cmpl 12(%esp), %eax # compare low words (unsigned) + seta %al # and extract result + setb %dl + subb %dl, %al + movsbl %al, %eax + ret + .type __i64_scmp, @function + .size __i64_scmp, . - __i64_scmp + -- cgit