1dnl ARM64 mpn_add_n and mpn_sub_n 2 3dnl Contributed to the GNU project by Torbjörn Granlund. 4 5dnl Copyright 2013, 2017 Free Software Foundation, Inc. 6 7dnl This file is part of the GNU MP Library. 8dnl 9dnl The GNU MP Library is free software; you can redistribute it and/or modify 10dnl it under the terms of either: 11dnl 12dnl * the GNU Lesser General Public License as published by the Free 13dnl Software Foundation; either version 3 of the License, or (at your 14dnl option) any later version. 15dnl 16dnl or 17dnl 18dnl * the GNU General Public License as published by the Free Software 19dnl Foundation; either version 2 of the License, or (at your option) any 20dnl later version. 21dnl 22dnl or both in parallel, as here. 23dnl 24dnl The GNU MP Library is distributed in the hope that it will be useful, but 25dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 26dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 27dnl for more details. 28dnl 29dnl You should have received copies of the GNU General Public License and the 30dnl GNU Lesser General Public License along with the GNU MP Library. If not, 31dnl see https://www.gnu.org/licenses/. 32 33include(`../config.m4') 34 35C cycles/limb 36C Cortex-A53 2.75-3.25 37C Cortex-A57 1.5 38C X-Gene 2.0 39 40changecom(blah) 41 42define(`rp', `x0') 43define(`up', `x1') 44define(`vp', `x2') 45define(`n', `x3') 46 47ifdef(`OPERATION_add_n', ` 48 define(`ADDSUBC', adcs) 49 define(`CLRCY', `cmn xzr, xzr') 50 define(`SETCY', `cmp $1, #1') 51 define(`RETVAL', `cset x0, cs') 52 define(`func_n', mpn_add_n) 53 define(`func_nc', mpn_add_nc)') 54ifdef(`OPERATION_sub_n', ` 55 define(`ADDSUBC', sbcs) 56 define(`CLRCY', `cmp xzr, xzr') 57 define(`SETCY', `cmp xzr, $1') 58 define(`RETVAL', `cset x0, cc') 59 define(`func_n', mpn_sub_n) 60 define(`func_nc', mpn_sub_nc)') 61 62MULFUNC_PROLOGUE(mpn_add_n mpn_add_nc mpn_sub_n mpn_sub_nc) 63 64ASM_START() 65PROLOGUE(func_nc) 66 SETCY( x4) 67 b L(ent) 68EPILOGUE() 69PROLOGUE(func_n) 70 CLRCY 71L(ent): lsr x18, n, #2 72 tbz n, #0, L(bx0) 73 74L(bx1): ldr x7, [up] 75 ldr x11, [vp] 76 ADDSUBC x13, x7, x11 77 str x13, [rp],#8 78 tbnz n, #1, L(b11) 79 80L(b01): cbz x18, L(ret) 81 ldp x4, x5, [up,#8] 82 ldp x8, x9, [vp,#8] 83 sub up, up, #8 84 sub vp, vp, #8 85 b L(mid) 86 87L(b11): ldp x6, x7, [up,#8] 88 ldp x10, x11, [vp,#8] 89 add up, up, #8 90 add vp, vp, #8 91 cbz x18, L(end) 92 b L(top) 93 94L(bx0): tbnz n, #1, L(b10) 95 96L(b00): ldp x4, x5, [up] 97 ldp x8, x9, [vp] 98 sub up, up, #16 99 sub vp, vp, #16 100 b L(mid) 101 102L(b10): ldp x6, x7, [up] 103 ldp x10, x11, [vp] 104 cbz x18, L(end) 105 106 ALIGN(16) 107L(top): ldp x4, x5, [up,#16] 108 ldp x8, x9, [vp,#16] 109 ADDSUBC x12, x6, x10 110 ADDSUBC x13, x7, x11 111 stp x12, x13, [rp],#16 112L(mid): ldp x6, x7, [up,#32]! 113 ldp x10, x11, [vp,#32]! 114 ADDSUBC x12, x4, x8 115 ADDSUBC x13, x5, x9 116 stp x12, x13, [rp],#16 117 sub x18, x18, #1 118 cbnz x18, L(top) 119 120L(end): ADDSUBC x12, x6, x10 121 ADDSUBC x13, x7, x11 122 stp x12, x13, [rp] 123L(ret): RETVAL 124 ret 125EPILOGUE() 126