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Diffstat (limited to 'plugins/MirOTR/Libgcrypt/mpi/hppa1.1/mpih-mul1.S')
| -rw-r--r-- | plugins/MirOTR/Libgcrypt/mpi/hppa1.1/mpih-mul1.S | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/plugins/MirOTR/Libgcrypt/mpi/hppa1.1/mpih-mul1.S b/plugins/MirOTR/Libgcrypt/mpi/hppa1.1/mpih-mul1.S new file mode 100644 index 0000000000..45926dd7b5 --- /dev/null +++ b/plugins/MirOTR/Libgcrypt/mpi/hppa1.1/mpih-mul1.S @@ -0,0 +1,115 @@ +/* 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, 1998, + * 2001, 2002 Free Software Foundation, Inc. + * + * This file is part of Libgcrypt. + * + * Libgcrypt is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * Libgcrypt 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser 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. + */ + + +/******************* + * mpi_limb_t + * _gcry_mpih_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.) + */ + + .level 1.1 + + .code + .export _gcry_mpih_mul_1 + .label _gcry_mpih_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 + .label 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 + + .label L$end + stws,ma %r19,4(%r26) + addc %r28,%r1,%r19 + ldw -16(%r30),%r28 + stws,ma %r19,4(%r26) + addc %r0,%r28,%r28 + bv 0(%r2) + ldo -64(%r30),%r30 + + .label L$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 + + |