diff options
Diffstat (limited to 'libotr/libgcrypt-1.8.7/mpi/power/mpih-lshift.S')
| -rw-r--r-- | libotr/libgcrypt-1.8.7/mpi/power/mpih-lshift.S | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/libotr/libgcrypt-1.8.7/mpi/power/mpih-lshift.S b/libotr/libgcrypt-1.8.7/mpi/power/mpih-lshift.S new file mode 100644 index 0000000..d9e42da --- /dev/null +++ b/libotr/libgcrypt-1.8.7/mpi/power/mpih-lshift.S @@ -0,0 +1,64 @@ +/* IBM POWER lshift + * + * Copyright (C) 1992, 1994, 1999, 2002 Free Software Foundation, Inc. + * + * 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include "sysdep.h" +#include "asm-syntax.h" + +/* +# INPUT PARAMETERS +# res_ptr r3 +# s_ptr r4 +# size r5 +# cnt r6 + */ + + .toc + .extern _gcry_mpih_lshift[DS] + .extern ._gcry_mpih_lshift +.csect [PR] + .align 2 + .globl _gcry_mpih_lshift + .globl ._gcry_mpih_lshift + .csect _gcry_mpih_lshift[DS] +_gcry_mpih_lshift: + .long ._gcry_mpih_lshift, TOC[tc0], 0 + .csect [PR] +._gcry_mpih_lshift: + sli 0,5,2 + cax 9,3,0 + cax 4,4,0 + sfi 8,6,32 + mtctr 5 # put limb count in CTR loop register + lu 0,-4(4) # read most significant limb + sre 3,0,8 # compute carry out limb, and init MQ register + bdz Lend2 # if just one limb, skip loop + lu 0,-4(4) # read 2:nd most significant limb + sreq 7,0,8 # compute most significant limb of result + bdz Lend # if just two limb, skip loop +Loop: lu 0,-4(4) # load next lower limb + stu 7,-4(9) # store previous result during read latency + sreq 7,0,8 # compute result limb + bdn Loop # loop back until CTR is zero +Lend: stu 7,-4(9) # store 2:nd least significant limb +Lend2: sle 7,0,6 # compute least significant limb + st 7,-4(9) # store it + br + |