From 470f6402ea49a81a5c861fcce66cb05ebff977c1 Mon Sep 17 00:00:00 2001 From: Xavier Leroy Date: Sat, 12 Sep 2015 19:04:12 +0200 Subject: PowerPC 64 bits: alternate, more efficient implementations of int64 operations. --- runtime/powerpc/ppc64/i64_smod.s | 54 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 runtime/powerpc/ppc64/i64_smod.s (limited to 'runtime/powerpc/ppc64/i64_smod.s') diff --git a/runtime/powerpc/ppc64/i64_smod.s b/runtime/powerpc/ppc64/i64_smod.s new file mode 100644 index 00000000..35be366d --- /dev/null +++ b/runtime/powerpc/ppc64/i64_smod.s @@ -0,0 +1,54 @@ +# ***************************************************************** +# +# 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. PowerPC 64 version. + + .text + +## Signed remainder + + .balign 16 + .globl __i64_smod +__i64_smod: + rldimi r4, r3, 32, 0 # reassemble (r3,r4) as a 64-bit integer in r4 + rldimi r6, r5, 32, 0 # reassemble (r5,r6) as a 64-bit integer in r6 + divd r0, r4, r6 + mulld r0, r0, r6 + subf r4, r0, r4 + srdi r3, r4, 32 # split r4 into (r3,r4) + blr + .type __i64_smod, @function + .size __i64_smod, .-__i64_smod + + \ No newline at end of file -- cgit