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* Copyright (C) 1995, 1998 Free Software Foundation, Inc.
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* This file is part of GnuPG.
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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#include "asm-syntax.h"
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#ifndef USE_PPC_PATCHES
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* mpihelp_lshift( mpi_ptr_t wp, (r3)
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* mpi_size_t usize, (r5)
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.globl .mpihelp_lshift
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.csect mpihelp_lshift[DS]
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.long .mpihelp_lshift, TOC[tc0], 0
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mtctr 5 # copy size into CTR
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add 7,3,0 # make r7 point at end of res
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add 4,4,0 # make r4 point at end of s1
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lwzu 11,-4(4) # load first s1 limb
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srw 3,11,8 # compute function return value
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/* Shift a limb left, low level routine.
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Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* mp_limb_t mpn_lshift (mp_ptr wp, mp_srcptr up, mp_size_t usize,
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EALIGN(mpihelp_lshift,3,0)
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mtctr %r5 # copy size into CTR
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cmplwi %cr0,%r5,16 # is size < 16
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add %r7,%r3,%r0 # make r7 point at end of res
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add %r4,%r4,%r0 # make r4 point at end of s1
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lwzu %r11,-4(%r4) # load first s1 limb
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srw %r3,%r11,%r8 # compute function return value
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bge %cr0,L(big) # branch if size >= 16
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L(end1):slw %r0,%r11,%r6
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/* Guaranteed not to succeed. */
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L(boom): tweq %r0,%r0
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/* We imitate a case statement, by using (yuk!) fixed-length code chunks,
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of size 4*12 bytes. We have to do this (or something) to make this PIC. */
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bltl- %cr0,L(boom) # Never taken, only used to set LR.
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L(end2):slw %r0,%r10,%r6
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#define DO_LSHIFT(n) \
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0: lwzu %r10,-4(%r4); \
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inslwi %r9,%r10,n,32-n; \
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inslwi %r9,%r11,n,32-n; \
added
removed
mpi/powerpc32/mpih-lshift.S
