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-/* hppa sub_n -- Sub two limb vectors of the same length > 0 and store
- * sum in a third limb vector.
- *
- * Copyright (C) 1992, 1994, 1998,
- * 2001 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
- *
- * Note: This code is heavily based on the GNU MP Library.
- * Actually it's the same code with only minor changes in the
- * way the data is stored; this is to support the abstraction
- * of an optional secure memory allocation which may be used
- * to avoid revealing of sensitive data due to paging etc.
- * The GNU MP Library itself is published under the LGPL;
- * however I decided to publish this code under the plain GPL.
- */
-
-
-#include "sysdep.h"
-#include "asm-syntax.h"
-
-
-/*******************
- * mpi_limb_t
- * mpihelp_sub_n( mpi_ptr_t res_ptr, (gr26)
- * mpi_ptr_t s1_ptr, (gr25)
- * mpi_ptr_t s2_ptr, (gr24)
- * mpi_size_t size) (gr23)
- *
- * One might want to unroll this as for other processors, but it turns
- * out that the data cache contention after a store makes such
- * unrolling useless. We can't come under 5 cycles/limb anyway.
- */
-
-
- .code
- .export mpihelp_sub_n
- .label mpihelp_sub_n
- .proc
- .callinfo frame=0,no_calls
- .entry
-
- ldws,ma 4(0,%r25),%r20
- ldws,ma 4(0,%r24),%r19
-
- addib,= -1,%r23,L$end ; check for (SIZE == 1)
- sub %r20,%r19,%r28 ; subtract first limbs ignoring cy
-
- .label L$loop
- ldws,ma 4(0,%r25),%r20
- ldws,ma 4(0,%r24),%r19
- stws,ma %r28,4(0,%r26)
- addib,<> -1,%r23,L$loop
- subb %r20,%r19,%r28
-
- .label L$end
- stws %r28,0(0,%r26)
- addc %r0,%r0,%r28
- bv 0(%r2)
- subi 1,%r28,%r28
-
- .exit
- .procend
-
-
-