1dnl PowerPC-64 mpn_hamdist. 2 3dnl Copyright 2012, 2017 Free Software Foundation, Inc. 4 5dnl This file is part of the GNU MP Library. 6dnl 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of either: 9dnl 10dnl * the GNU Lesser General Public License as published by the Free 11dnl Software Foundation; either version 3 of the License, or (at your 12dnl option) any later version. 13dnl 14dnl or 15dnl 16dnl * the GNU General Public License as published by the Free Software 17dnl Foundation; either version 2 of the License, or (at your option) any 18dnl later version. 19dnl 20dnl or both in parallel, as here. 21dnl 22dnl The GNU MP Library is distributed in the hope that it will be useful, but 23dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 24dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 25dnl for more details. 26dnl 27dnl You should have received copies of the GNU General Public License and the 28dnl GNU Lesser General Public License along with the GNU MP Library. If not, 29dnl see https://www.gnu.org/licenses/. 30 31include(`../config.m4') 32 33C cycles/limb 34C POWER3/PPC630 - 35C POWER4/PPC970 - 36C POWER5 - 37C POWER6 - 38C POWER7 2.87 39 40define(`up', r3) 41define(`vp', r4) 42define(`n', r5) 43 44ASM_START() 45PROLOGUE(mpn_hamdist) 46 std r30, -16(r1) 47 std r31, -8(r1) 48 49 addi r0, n, 1 50ifdef(`HAVE_ABI_mode32', 51` rldicl r0, r0, 63,33', C ...branch count 52` srdi r0, r0, 1') C ...for ctr 53 mtctr r0 54 55 andi. r0, n, 1 56 57 li r0, 0 58 li r12, 0 59 60 beq L(evn) 61 62L(odd): ld r6, 0(up) 63 addi up, up, 8 64 ld r8, 0(vp) 65 addi vp, vp, 8 66 xor r10, r6, r8 67 popcntd(r0, r10) 68 bdz L(e1) 69 70L(evn): ld r6, 0(up) 71 ld r8, 0(vp) 72 ld r7, 8(up) 73 ld r9, 8(vp) 74 xor r10, r6, r8 75 addi up, up, 16 76 addi vp, vp, 16 77 li r30, 0 78 li r31, 0 79 bdz L(end) 80 81 nop 82 nop 83C ALIGN(16) 84L(top): add r0, r0, r30 85 ld r6, 0(up) 86 ld r8, 0(vp) 87 xor r11, r7, r9 88 popcntd(r30, r10) 89 add r12, r12, r31 90 ld r7, 8(up) 91 ld r9, 8(vp) 92 xor r10, r6, r8 93 popcntd(r31, r11) 94 addi up, up, 16 95 addi vp, vp, 16 96 bdnz L(top) 97 98L(end): add r0, r0, r30 99 xor r11, r7, r9 100 popcntd(r30, r10) 101 add r12, r12, r31 102 popcntd(r31, r11) 103 104 add r0, r0, r30 105 add r12, r12, r31 106L(e1): add r3, r0, r12 107 ld r30, -16(r1) 108 ld r31, -8(r1) 109 blr 110EPILOGUE() 111