1dnl AMD64 mpn_copyd -- copy limb vector, decrementing. 2 3dnl Copyright 2003, 2005, 2007 Free Software Foundation, Inc. 4 5dnl This file is part of the GNU MP Library. 6 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of the GNU Lesser General Public License as published 9dnl by the Free Software Foundation; either version 3 of the License, or (at 10dnl your option) any later version. 11 12dnl The GNU MP Library is distributed in the hope that it will be useful, but 13dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15dnl License for more details. 16 17dnl You should have received a copy of the GNU Lesser General Public License 18dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. 19 20include(`../config.m4') 21 22 23C cycles/limb 24C K8,K9: 1 25C K10: 1 26C P4: 2.8 27C P6 core2: 1.2 28C P6 corei7: 1 29 30 31C INPUT PARAMETERS 32C rp rdi 33C up rsi 34C n rdx 35 36define(`rp',`%rdi') 37define(`up',`%rsi') 38define(`n',`%rdx') 39 40ASM_START() 41 TEXT 42 ALIGN(16) 43PROLOGUE(mpn_copyd) 44 leaq -8(up,n,8), up 45 leaq (rp,n,8), rp 46 subq $4, n 47 jc L(end) 48 ALIGN(16) 49L(oop): movq (up), %r8 50 movq -8(up), %r9 51 leaq -32(rp), rp 52 movq -16(up), %r10 53 movq -24(up), %r11 54 leaq -32(up), up 55 movq %r8, 24(rp) 56 movq %r9, 16(rp) 57 subq $4, n 58 movq %r10, 8(rp) 59 movq %r11, (rp) 60 jnc L(oop) 61 62L(end): shrl %edx C edx = lowpart(n) 63 jnc 1f 64 movq (up), %r8 65 movq %r8, -8(rp) 66 leaq -8(rp), rp 67 leaq -8(up), up 681: shrl %edx C edx = lowpart(n) 69 jnc 1f 70 movq (up), %r8 71 movq -8(up), %r9 72 movq %r8, -8(rp) 73 movq %r9, -16(rp) 741: ret 75EPILOGUE() 76