diff options
Diffstat (limited to 'sysdeps/hppa/hppa1.1/submul_1.S')
| -rw-r--r-- | sysdeps/hppa/hppa1.1/submul_1.S | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/sysdeps/hppa/hppa1.1/submul_1.S b/sysdeps/hppa/hppa1.1/submul_1.S deleted file mode 100644 index c2b350d735..0000000000 --- a/sysdeps/hppa/hppa1.1/submul_1.S +++ /dev/null @@ -1,112 +0,0 @@ -;! HP-PA-1.1 __mpn_submul_1 -- Multiply a limb vector with a limb and -;! subtract the result from a second limb vector. - -;! Copyright (C) 1992-2017 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. If not, see -;! <http://www.gnu.org/licenses/>. - - -;! INPUT PARAMETERS -;! res_ptr r26 -;! s1_ptr r25 -;! size r24 -;! s2_limb r23 - -;! This runs at 12 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 11 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 could gain a cycle/limb -;! on the PA7100. - -;! There are some ideas described in mul_1.s that applies to this code too. - -;! It seems possible to make this run as fast as __mpn_addmul_1, if we use -;! sub,>>= %r29,%r20,%r22 -;! addi 1,%r28,%r28 -;! but that requires reworking the hairy software pipeline... - - .text - .export __mpn_submul_1 -__mpn_submul_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$loop: - ldws 0(%r26),%r29 - fldws,ma 4(%r25),%fr5 - sub %r29,%r20,%r22 - add %r22,%r20,%r0 - stws,ma %r22,4(%r26) - addc %r28,%r1,%r20 - xmpyu %fr4,%fr5,%fr6 - ldw -16(%r30),%r28 - fstds %fr6,-16(%r30) - addc %r0,%r28,%r28 - addib,<> -1,%r24,L$loop - ldw -12(%r30),%r1 - -L$end: - ldw 0(%r26),%r29 - sub %r29,%r20,%r22 - add %r22,%r20,%r0 - stws,ma %r22,4(%r26) - addc %r28,%r1,%r20 - ldw -16(%r30),%r28 - ldws 0(%r26),%r29 - addc %r0,%r28,%r28 - sub %r29,%r20,%r22 - add %r22,%r20,%r0 - stws,ma %r22,4(%r26) - addc %r0,%r28,%r28 - bv 0(%r2) - ldo -64(%r30),%r30 - -L$just_one_limb: - xmpyu %fr4,%fr5,%fr6 - ldw 0(%r26),%r29 - fstds %fr6,-16(%r30) - ldw -12(%r30),%r1 - ldw -16(%r30),%r28 - sub %r29,%r1,%r22 - add %r22,%r1,%r0 - stw %r22,0(%r26) - addc %r0,%r28,%r28 - bv 0(%r2) - ldo -64(%r30),%r30 - - .exit - .procend |