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Diffstat (limited to 'mpi/powerpc32/mpih-sub1.S')
| -rw-r--r-- | mpi/powerpc32/mpih-sub1.S | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/mpi/powerpc32/mpih-sub1.S b/mpi/powerpc32/mpih-sub1.S deleted file mode 100644 index cb87cc70..00000000 --- a/mpi/powerpc32/mpih-sub1.S +++ /dev/null @@ -1,132 +0,0 @@ -/* PowerPC-32 sub_n -- Subtract two limb vectors of the same length > 0 - * and store difference in a third limb vector. - * - * Copyright (C) 1992, 1994, 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 - */ - -#include "sysdep.h" -#include "asm-syntax.h" - - -#ifndef USE_PPC_PATCHES - -/******************* - * mpi_limb_t - * mpihelp_sub_n( mpi_ptr_t res_ptr, (r3) - * mpi_ptr_t s1_ptr, (r4) - * mpi_ptr_t s2_ptr, (r5) - * mpi_size_t size) (r6) - */ - - .toc - .extern mpihelp_sub_n[DS] - .extern .mpihelp_sub_n -.csect [PR] - .align 2 - .globl mpihelp_sub_n - .globl .mpihelp_sub_n - .csect mpihelp_sub_n[DS] -mpihelp_sub_n: - .long .mpihelp_sub_n, TOC[tc0], 0 - .csect [PR] -.mpihelp_sub_n: - mtctr 6 # copy size into CTR - lwz 8,0(4) # load least significant s1 limb - lwz 0,0(5) # load least significant s2 limb - addi 3,3,-4 # offset res_ptr, it is updated before used - subfc 7,0,8 # add least significant limbs, set cy - bdz Lend # If done, skip loop -Loop: lwzu 8,4(4) # load s1 limb and update s1_ptr - lwzu 0,4(5) # load s2 limb and update s2_ptr - stwu 7,4(3) # store previous limb in load latency slot - subfe 7,0,8 # add new limbs with cy, set cy - bdnz Loop # decrement CTR and loop back -Lend: stw 7,4(3) # store ultimate result limb - subfe 3,0,0 # load !cy into ... - subfic 3,3,0 # ... return value register - blr - -#else -/* Subtract two limb vectors of equal, non-zero length for PowerPC. - Copyright (C) 1997 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* mp_limb_t mpn_sub_n (mp_ptr res_ptr, mp_srcptr s1_ptr, mp_srcptr s2_ptr, - mp_size_t size) - Calculate s1-s2 and put result in res_ptr; return borrow, 0 or 1. */ - -/* Note on optimisation: This code is optimal for the 601. Almost every other - possible 2-unrolled inner loop will not be. Also, watch out for the - alignment... */ - -EALIGN(mpihelp_sub_n,3,1) -/* Set up for loop below. */ - mtcrf 0x01,%r6 - srwi. %r7,%r6,1 - mtctr %r7 - bt 31,2f - -/* Set the carry (clear the borrow). */ - subfc %r0,%r0,%r0 -/* Adjust pointers for loop. */ - addi %r3,%r3,-4 - addi %r4,%r4,-4 - addi %r5,%r5,-4 - b 0f - -2: lwz %r7,0(%r5) - lwz %r6,0(%r4) - subfc %r6,%r7,%r6 - stw %r6,0(%r3) - beq 1f - -/* Align start of loop to an odd word boundary to guarantee that the - last two words can be fetched in one access (for 601). This turns - out to be important. */ -0: - lwz %r9,4(%r4) - lwz %r8,4(%r5) - lwzu %r6,8(%r4) - lwzu %r7,8(%r5) - subfe %r8,%r8,%r9 - stw %r8,4(%r3) - subfe %r6,%r7,%r6 - stwu %r6,8(%r3) - bdnz 0b -/* Return the borrow. */ -1: subfe %r3,%r3,%r3 - neg %r3,%r3 - blr -END(mpihelp_sub_n) -#endif |