1/* SPARC v8 __mpn_submul_1 -- Multiply a limb vector with a limb and 2 * subtract the result from a second limb vector. 3 * 4 * Copyright (C) 1992, 1993, 1994, 1998, 5 * 2001, 2002 Free Software Foundation, Inc. 6 * 7 * This file is part of Libgcrypt. 8 * 9 * Libgcrypt is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU Lesser General Public License as 11 * published by the Free Software Foundation; either version 2.1 of 12 * the License, or (at your option) any later version. 13 * 14 * Libgcrypt is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 22 * 23 * Note: This code is heavily based on the GNU MP Library. 24 * Actually it's the same code with only minor changes in the 25 * way the data is stored; this is to support the abstraction 26 * of an optional secure memory allocation which may be used 27 * to avoid revealing of sensitive data due to paging etc. 28 */ 29 30 31! INPUT PARAMETERS 32! res_ptr o0 33! s1_ptr o1 34! size o2 35! s2_limb o3 36 37#include "sysdep.h" 38 39.text 40 .align 4 41 .global C_SYMBOL_NAME(_gcry_mpih_submul_1) 42C_SYMBOL_NAME(_gcry_mpih_submul_1): 43 sub %g0,%o2,%o2 ! negate ... 44 sll %o2,2,%o2 ! ... and scale size 45 sub %o1,%o2,%o1 ! o1 is offset s1_ptr 46 sub %o0,%o2,%g1 ! g1 is offset res_ptr 47 48 mov 0,%o0 ! clear cy_limb 49 50Loop: ld [%o1+%o2],%o4 51 ld [%g1+%o2],%g2 52 umul %o4,%o3,%o5 53 rd %y,%g3 54 addcc %o5,%o0,%o5 55 addx %g3,0,%o0 56 subcc %g2,%o5,%g2 57 addx %o0,0,%o0 58 st %g2,[%g1+%o2] 59 60 addcc %o2,4,%o2 61 bne Loop 62 nop 63 64 retl 65 nop 66 67 68