diff options
Diffstat (limited to 'gmp-6.3.0/mpn/powerpc64/mode64/p8/invert_limb.asm')
| -rw-r--r-- | gmp-6.3.0/mpn/powerpc64/mode64/p8/invert_limb.asm | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/powerpc64/mode64/p8/invert_limb.asm b/gmp-6.3.0/mpn/powerpc64/mode64/p8/invert_limb.asm new file mode 100644 index 0000000..53ea0e0 --- /dev/null +++ b/gmp-6.3.0/mpn/powerpc64/mode64/p8/invert_limb.asm @@ -0,0 +1,53 @@ +dnl PowerPC-64 mpn_invert_limb -- Invert a normalized limb. + +dnl Copyright 2015, 2017 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 (approximate) +C POWER3/PPC630 - +C POWER4/PPC970 - +C POWER5 - +C POWER6 - +C POWER7 ? +C POWER8 32 + +C This runs on POWER7 and later, but is faster only on later CPUs. +C We might want to inline this, considering its small footprint. + +ASM_START() +PROLOGUE(mpn_invert_limb) + sldi. r4, r3, 1 + neg r5, r3 + divdeu( r3, r5, r3) + beq- L(1) + blr +L(1): li r3, -1 + blr +EPILOGUE() |