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Diffstat (limited to 'sysdeps/hppa/hppa1.1/mul_1.s')
| -rw-r--r-- | sysdeps/hppa/hppa1.1/mul_1.s | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/sysdeps/hppa/hppa1.1/mul_1.s b/sysdeps/hppa/hppa1.1/mul_1.s deleted file mode 100644 index 00c770f..0000000 --- a/sysdeps/hppa/hppa1.1/mul_1.s +++ /dev/null @@ -1,100 +0,0 @@ -;! HP-PA-1.1 __mpn_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. - -;! This file is part of the GNU MP Library. - -;! The GNU MP Library 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. - -;! The GNU MP 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 Lesser General Public -;! License for more details. - -;! You should have received a copy of the GNU Lesser General Public License -;! along with the GNU MP 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. - - -;! INPUT PARAMETERS -;! res_ptr r26 -;! s1_ptr r25 -;! size r24 -;! 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.) - - .text - .export __mpn_mul_1 -__mpn_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$just_one_limb - fldws -16(%r30),%fr4 ;! ... into fr4 - add %r0,%r0,%r0 ;! clear carry - xmpyu %fr4,%fr5,%fr6 - fldws,ma 4(%r25),%fr7 - fstds %fr6,-16(%r30) - xmpyu %fr4,%fr7,%fr8 - ldw -12(%r30),%r20 ;! least significant limb in product - ldw -16(%r30),%r28 - - fstds %fr8,-16(%r30) - addib,= -1,%r24,L$end - ldw -12(%r30),%r1 - -;! Main loop -L$loop: - fldws,ma 4(%r25),%fr5 - stws,ma %r20,4(%r26) - addc %r28,%r1,%r20 - xmpyu %fr4,%fr5,%fr6 - ldw -16(%r30),%r28 - fstds %fr6,-16(%r30) - addib,<> -1,%r24,L$loop - ldw -12(%r30),%r1 - -L$end: - stws,ma %r20,4(%r26) - addc %r28,%r1,%r20 - ldw -16(%r30),%r28 - stws,ma %r20,4(%r26) - addc %r0,%r28,%r28 - bv 0(%r2) - ldo -64(%r30),%r30 - -L$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 |