From a89a14ef5da44684a16b204e7a70460cc8c4922a Mon Sep 17 00:00:00 2001 From: Thomas Voss Date: Fri, 21 Jun 2024 23:36:36 +0200 Subject: Basic constant folding implementation --- vendor/gmp-6.3.0/mpn/s390_64/copyi.asm | 68 ++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 vendor/gmp-6.3.0/mpn/s390_64/copyi.asm (limited to 'vendor/gmp-6.3.0/mpn/s390_64/copyi.asm') diff --git a/vendor/gmp-6.3.0/mpn/s390_64/copyi.asm b/vendor/gmp-6.3.0/mpn/s390_64/copyi.asm new file mode 100644 index 0000000..bfb8881 --- /dev/null +++ b/vendor/gmp-6.3.0/mpn/s390_64/copyi.asm @@ -0,0 +1,68 @@ +dnl S/390-64 mpn_copyi + +dnl Copyright 2011 Free Software Foundation, Inc. + +dnl This file is part of the GNU MP Library. +dnl +dnl The GNU MP Library is free software; you can redistribute it and/or modify +dnl it under the terms of either: +dnl +dnl * the GNU Lesser General Public License as published by the Free +dnl Software Foundation; either version 3 of the License, or (at your +dnl option) any later version. +dnl +dnl or +dnl +dnl * the GNU General Public License as published by the Free Software +dnl Foundation; either version 2 of the License, or (at your option) any +dnl later version. +dnl +dnl or both in parallel, as here. +dnl +dnl The GNU MP Library is distributed in the hope that it will be useful, but +dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +dnl for more details. +dnl +dnl You should have received copies of the GNU General Public License and the +dnl GNU Lesser General Public License along with the GNU MP Library. If not, +dnl see https://www.gnu.org/licenses/. + + +include(`../config.m4') + +C cycles/limb +C z900 1.25 +C z990 0.75 +C z9 ? +C z10 1 +C z196 ? + +C NOTE +C * This is based on GNU libc memcpy which was written by Martin Schwidefsky. + +C INPUT PARAMETERS +define(`rp', `%r2') +define(`up', `%r3') +define(`n', `%r4') + +ASM_START() +PROLOGUE(mpn_copyi) + ltgr %r4, %r4 + sllg %r4, %r4, 3 + je L(rtn) + aghi %r4, -1 + srlg %r5, %r4, 8 + ltgr %r5, %r5 C < 256 bytes to copy? + je L(1) + +L(top): mvc 0(256, rp), 0(up) + la rp, 256(rp) + la up, 256(up) + brctg %r5, L(top) + +L(1): bras %r5, L(2) C make r5 point to mvc insn + mvc 0(1, rp), 0(up) +L(2): ex %r4, 0(%r5) C execute mvc with length ((n-1) mod 256)+1 +L(rtn): br %r14 +EPILOGUE() -- cgit v1.2.3