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Diffstat (limited to 'mpi/powerpc32/mpih-lshift.S')
| -rw-r--r-- | mpi/powerpc32/mpih-lshift.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/mpi/powerpc32/mpih-lshift.S b/mpi/powerpc32/mpih-lshift.S new file mode 100644 index 000000000..eb5bd5031 --- /dev/null +++ b/mpi/powerpc32/mpih-lshift.S @@ -0,0 +1,71 @@ +/* PowerPC-32 lshift + * + * Copyright (C) 1995, 1998 Free Software Foundation, Inc. + * + * This file is part of GnuPG. + * + * GnuPG is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * GnuPG 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 General Public License for more details. + * + * You should have received a copy of the GNU 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 + */ + + +/******************* + * mpi_limb_t + * mpihelp_lshift( mpi_ptr_t wp, (r3) + * mpi_ptr_t up, (r4) + * mpi_size_t usize, (r5) + * unsigned cnt) (r6) + */ + + .toc +.csect .text[PR] + .align 2 + .globl mpihelp_lshift + .globl .mpihelp_lshift + .csect mpihelp_lshift[DS] +mpihelp_lshift: + .long .mpihelp_lshift, TOC[tc0], 0 + .csect .text[PR] +.mpihelp_lshift: + mtctr 5 # copy size into CTR + slwi 0,5,2 + add 7,3,0 # make r7 point at end of res + add 4,4,0 # make r4 point at end of s1 + subfic 8,6,32 + lwzu 11,-4(4) # load first s1 limb + srw 3,11,8 # compute function return value + bdz Lend1 + +Loop: lwzu 10,-4(4) + slw 9,11,6 + srw 12,10,8 + or 9,9,12 + stwu 9,-4(7) + bdz Lend2 + lwzu 11,-4(4) + slw 9,10,6 + srw 12,11,8 + or 9,9,12 + stwu 9,-4(7) + bdnz Loop + +Lend1: slw 0,11,6 + stw 0,-4(7) + blr + +Lend2: slw 0,10,6 + stw 0,-4(7) + blr + + |