1/* AMD64 mul_1 -- Multiply a limb vector with a limb and store 2 * the result in a second limb vector. 3 * Copyright (C) 1992, 1994, 1998, 4 * 2001, 2002, 2006 Free Software Foundation, Inc. 5 * 6 * This file is part of Libgcrypt. 7 * 8 * Libgcrypt is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU Lesser General Public License as 10 * published by the Free Software Foundation; either version 2.1 of 11 * the License, or (at your option) any later version. 12 * 13 * Libgcrypt is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 21 * 22 * Note: This code is heavily based on the GNU MP Library. 23 * Actually it's the same code with only minor changes in the 24 * way the data is stored; this is to support the abstraction 25 * of an optional secure memory allocation which may be used 26 * to avoid revealing of sensitive data due to paging etc. 27 */ 28 29 30#include "sysdep.h" 31#include "asm-syntax.h" 32 33/******************* 34 * mpi_limb_t 35 * _gcry_mpih_mul_1( mpi_ptr_t res_ptr, (rdi) 36 * mpi_ptr_t s1_ptr, (rsi) 37 * mpi_size_t s1_size, (rdx) 38 * mpi_limb_t s2_limb) (rcx) 39 */ 40 41 42 TEXT 43 ALIGN(5) 44 .byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 45 46 GLOBL C_SYMBOL_NAME(_gcry_mpih_mul_1) 47C_SYMBOL_NAME(_gcry_mpih_mul_1:) 48 49 movq %rdx, %r11 50 leaq (%rsi,%rdx,8), %rsi 51 leaq (%rdi,%rdx,8), %rdi 52 negq %r11 53 xorl %r8d, %r8d 54 55.Loop: movq (%rsi,%r11,8), %rax 56 mulq %rcx 57 addq %r8, %rax 58 movl $0, %r8d 59 adcq %rdx, %r8 60 movq %rax, (%rdi,%r11,8) 61 incq %r11 62 jne .Loop 63 64 movq %r8, %rax 65 ret 66