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| author | Duncan Wilkie <antigravityd@gmail.com> | 2023-11-18 06:11:09 -0600 |
|---|---|---|
| committer | Duncan Wilkie <antigravityd@gmail.com> | 2023-11-18 06:11:09 -0600 |
| commit | 11da511c784eca003deb90c23570f0873954e0de (patch) | |
| tree | e14fdd3d5d6345956d67e79ae771d0633d28362b /gmp-6.3.0/mpn/s390_64/copyi.asm | |
Initial commit.
Diffstat (limited to 'gmp-6.3.0/mpn/s390_64/copyi.asm')
| -rw-r--r-- | gmp-6.3.0/mpn/s390_64/copyi.asm | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/s390_64/copyi.asm b/gmp-6.3.0/mpn/s390_64/copyi.asm new file mode 100644 index 0000000..bfb8881 --- /dev/null +++ b/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() |