diff options
Diffstat (limited to 'gmp/mpn/arm64/aors_n.asm')
| -rw-r--r-- | gmp/mpn/arm64/aors_n.asm | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/gmp/mpn/arm64/aors_n.asm b/gmp/mpn/arm64/aors_n.asm new file mode 100644 index 0000000000..a880cd35cf --- /dev/null +++ b/gmp/mpn/arm64/aors_n.asm @@ -0,0 +1,98 @@ +dnl ARM64 mpn_add_n and mpn_sub_n + +dnl Contributed to the GNU project by Torbjörn Granlund. + +dnl Copyright 2013 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 Cortex-A53 ? +C Cortex-A57 ? + +changecom(@&*$) + +define(`rp', `x0') +define(`up', `x1') +define(`vp', `x2') +define(`n', `x3') + +ifdef(`OPERATION_add_n', ` + define(`ADDSUBC', adcs) + define(`CLRCY', `cmn xzr, xzr') + define(`SETCY', `cmp $1, #1') + define(`RETVAL', `adc x0, xzr, xzr') + define(`func', mpn_add_n) + define(`func_nc', mpn_add_nc)') +ifdef(`OPERATION_sub_n', ` + define(`ADDSUBC', sbcs) + define(`CLRCY', `cmp xzr, xzr') + define(`SETCY', `subs $1, xzr, $1') + define(`RETVAL', `sbc x0, xzr, xzr + and x0, x0, #1') + define(`func', mpn_sub_n) + define(`func_nc', mpn_sub_nc)') + +MULFUNC_PROLOGUE(mpn_add_n mpn_add_nc mpn_sub_n mpn_sub_nc) + +ASM_START() +PROLOGUE(func_nc) + SETCY( x4) + b L(ent) +EPILOGUE() +PROLOGUE(func) + CLRCY +L(ent): tbz n, #0, L(b0) + + ldr x4, [up],#8 + ldr x6, [vp],#8 + sub n, n, #1 + ADDSUBC x8, x4, x6 + str x8, [rp],#8 + cbz n, L(rt) + +L(b0): ldp x4, x5, [up],#16 + ldp x6, x7, [vp],#16 + sub n, n, #2 + ADDSUBC x8, x4, x6 + ADDSUBC x9, x5, x7 + cbz n, L(end) + +L(top): ldp x4, x5, [up],#16 + ldp x6, x7, [vp],#16 + sub n, n, #2 + stp x8, x9, [rp],#16 + ADDSUBC x8, x4, x6 + ADDSUBC x9, x5, x7 + cbnz n, L(top) + +L(end): stp x8, x9, [rp] +L(rt): RETVAL + ret +EPILOGUE() |