diff options
Diffstat (limited to 'gmp/mpn/arm/v7a/cora15/neon/copyi.asm')
| -rw-r--r-- | gmp/mpn/arm/v7a/cora15/neon/copyi.asm | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/gmp/mpn/arm/v7a/cora15/neon/copyi.asm b/gmp/mpn/arm/v7a/cora15/neon/copyi.asm new file mode 100644 index 0000000000..2e05afe5e8 --- /dev/null +++ b/gmp/mpn/arm/v7a/cora15/neon/copyi.asm @@ -0,0 +1,90 @@ +dnl ARM Neon mpn_copyi optimised for A15. + +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 StrongARM - +C XScale - +C Cortex-A7 ? +C Cortex-A8 ? +C Cortex-A9 1.75 slower than core register code +C Cortex-A15 0.52 + +define(`rp', `r0') +define(`up', `r1') +define(`n', `r2') + +ASM_START() +PROLOGUE(mpn_copyi) + cmp n, #7 + ble L(bc) + +C Copy until rp is 128-bit aligned + tst rp, #4 + beq L(al1) + vld1.32 {d22[0]}, [up]! + sub n, n, #1 + vst1.32 {d22[0]}, [rp]! +L(al1): tst rp, #8 + beq L(al2) + vld1.32 {d22}, [up]! + sub n, n, #2 + vst1.32 {d22}, [rp:64]! +L(al2): vld1.32 {d26-d27}, [up]! + subs n, n, #12 + blt L(end) + + ALIGN(16) +L(top): vld1.32 {d22-d23}, [up]! + vst1.32 {d26-d27}, [rp:128]! + vld1.32 {d26-d27}, [up]! + vst1.32 {d22-d23}, [rp:128]! + subs n, n, #8 + bge L(top) + +L(end): vst1.32 {d26-d27}, [rp:128]! + +C Copy last 0-7 limbs. Note that rp is aligned after loop, but not when we +C arrive here via L(bc) +L(bc): tst n, #4 + beq L(tl1) + vld1.32 {d22-d23}, [up]! + vst1.32 {d22-d23}, [rp]! +L(tl1): tst n, #2 + beq L(tl2) + vld1.32 {d22}, [up]! + vst1.32 {d22}, [rp]! +L(tl2): tst n, #1 + beq L(tl3) + vld1.32 {d22[0]}, [up] + vst1.32 {d22[0]}, [rp] +L(tl3): bx lr +EPILOGUE() |