diff options
Diffstat (limited to 'comm/third_party/libgcrypt/mpi/arm/mpih-mul2.S')
-rw-r--r-- | comm/third_party/libgcrypt/mpi/arm/mpih-mul2.S | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/comm/third_party/libgcrypt/mpi/arm/mpih-mul2.S b/comm/third_party/libgcrypt/mpi/arm/mpih-mul2.S new file mode 100644 index 0000000000..bce932e9b0 --- /dev/null +++ b/comm/third_party/libgcrypt/mpi/arm/mpih-mul2.S @@ -0,0 +1,94 @@ +/* ARM mul_2 -- Multiply a limb vector with a limb and add the result to + * a second limb vector. + * + * Copyright (C) 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> + * + * This file is part of Libgcrypt. + * + * Libgcrypt is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * Libgcrypt is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program; if not, see <http://www.gnu.org/licenses/>. + * + * Note: This code is heavily based on the GNU MP Library (version 4.2.1). + */ + +#include "sysdep.h" +#include "asm-syntax.h" + +.syntax unified +.arm + +/******************* + * mpi_limb_t + * _gcry_mpih_addmul_1( mpi_ptr_t res_ptr, %r0 + * mpi_ptr_t s1_ptr, %r1 + * mpi_size_t s1_size, %r2 + * mpi_limb_t s2_limb) %r3 + */ + +.text + +.globl _gcry_mpih_addmul_1 +.type _gcry_mpih_addmul_1,%function +_gcry_mpih_addmul_1: + push {%r4, %r5, %r6, %r8, %r10, %lr}; + mov %lr, #0; + cmn %r0, #0; /* clear carry flag */ + + tst %r2, #3; + beq .Large_loop; +.Loop: + ldr %r5, [%r1], #4; + ldr %r4, [%r0]; + sub %r2, #1; + adcs %r4, %lr; + mov %lr, #0; + umlal %r4, %lr, %r5, %r3; + tst %r2, #3; + str %r4, [%r0], #4; + bne .Loop; + + teq %r2, #0; + beq .Lend; + +.Large_loop: + ldr %r5, [%r1], #4; + ldm %r0, {%r4, %r6, %r8, %r10}; + + sub %r2, #4; + adcs %r4, %lr; + mov %lr, #0; + umlal %r4, %lr, %r5, %r3; + + ldr %r5, [%r1], #4; + adcs %r6, %lr; + mov %lr, #0; + umlal %r6, %lr, %r5, %r3; + + ldr %r5, [%r1], #4; + adcs %r8, %lr; + mov %lr, #0; + umlal %r8, %lr, %r5, %r3; + + ldr %r5, [%r1], #4; + adcs %r10, %lr; + mov %lr, #0; + umlal %r10, %lr, %r5, %r3; + + teq %r2, #0; + stm %r0!, {%r4, %r6, %r8, %r10}; + bne .Large_loop; + +.Lend: + adc %r0, %lr, #0; + pop {%r4, %r5, %r6, %r8, %r10, %pc}; +.size _gcry_mpih_addmul_1,.-_gcry_mpih_addmul_1; |