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Diffstat (limited to 'mpi/hppa1.1/mpih-mul1.S')
| -rw-r--r-- | mpi/hppa1.1/mpih-mul1.S | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/mpi/hppa1.1/mpih-mul1.S b/mpi/hppa1.1/mpih-mul1.S deleted file mode 100644 index 1f737747..00000000 --- a/mpi/hppa1.1/mpih-mul1.S +++ /dev/null @@ -1,112 +0,0 @@ -/* hppa1.1 mul_1 -- Multiply a limb vector with a limb and store - * the result in a second limb vector. - * Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc. - * Copyright (C) 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 - * - * 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. - */ - - -/******************* - * mpi_limb_t - * mpihelp_mul_1( mpi_ptr_t res_ptr, (r26) - * mpi_ptr_t s1_ptr, (r25) - * mpi_size_t s1_size, (r24) - * mpi_limb_t s2_limb) (r23) - * - * - * - * This runs at 9 cycles/limb on a PA7000. With the used instructions, it can - * not become faster due to data cache contention after a store. On the - * PA7100 it runs at 7 cycles/limb, and that can not be improved either, since - * only the xmpyu does not need the integer pipeline, so the only dual-issue - * we will get are addc+xmpyu. Unrolling would not help either CPU. - * - * We could use fldds to read two limbs at a time from the S1 array, and that - * could bring down the times to 8.5 and 6.5 cycles/limb for the PA7000 and - * PA7100, respectively. We don't do that since it does not seem worth the - * (alignment) troubles... - * - * At least the PA7100 is rumored to be able to deal with cache-misses - * without stalling instruction issue. If this is true, and the cache is - * actually also lockup-free, we should use a deeper software pipeline, and - * load from S1 very early! (The loads and stores to -12(sp) will surely be - * in the cache.) - */ - - .code - .export mpihelp_mul_1 -mpihelp_mul_1 - .proc - .callinfo frame=64,no_calls - .entry - - ldo 64(%r30),%r30 - fldws,ma 4(%r25),%fr5 - stw %r23,-16(%r30) ; move s2_limb ... - addib,= -1,%r24,L$just_one_limb - fldws -16(%r30),%fr4 ; ... into fr4 - add %r0,%r0,%r0 ; clear carry - xmpyu %fr4,%fr5,%fr6 - fldws,ma 4(%r25),%fr7 - fstds %fr6,-16(%r30) - xmpyu %fr4,%fr7,%fr8 - ldw -12(%r30),%r19 ; least significant limb in product - ldw -16(%r30),%r28 - - fstds %fr8,-16(%r30) - addib,= -1,%r24,L$end - ldw -12(%r30),%r1 - -; Main loop -L$loop fldws,ma 4(%r25),%fr5 - stws,ma %r19,4(%r26) - addc %r28,%r1,%r19 - xmpyu %fr4,%fr5,%fr6 - ldw -16(%r30),%r28 - fstds %fr6,-16(%r30) - addib,<> -1,%r24,L$loop - ldw -12(%r30),%r1 - -L$end stws,ma %r19,4(%r26) - addc %r28,%r1,%r19 - ldw -16(%r30),%r28 - stws,ma %r19,4(%r26) - addc %r0,%r28,%r28 - bv 0(%r2) - ldo -64(%r30),%r30 - -L$just_one_limb - xmpyu %fr4,%fr5,%fr6 - fstds %fr6,-16(%r30) - ldw -16(%r30),%r28 - ldo -64(%r30),%r30 - bv 0(%r2) - fstws %fr6R,0(%r26) - - .exit - .procend - - |