diff options
author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
---|---|---|
committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/hppa/hppa1.1/submul_1.S | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.xz glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
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 |