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added assembler stuff for hppa
This commit is contained in:
Werner Koch
parent
fec94908c3
commit
b9fccd69e4
12 changed files with 894 additions and 4 deletions
84
mpi/hppa/README
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84
mpi/hppa/README
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@ -0,0 +1,84 @@
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This directory contains mpn functions for various HP PA-RISC chips. Code
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that runs faster on the PA7100 and later implementations, is in the pa7100
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directory.
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RELEVANT OPTIMIZATION ISSUES
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Load and Store timing
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On the PA7000 no memory instructions can issue the two cycles after a store.
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For the PA7100, this is reduced to one cycle.
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The PA7100 has a lookup-free cache, so it helps to schedule loads and the
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dependent instruction really far from each other.
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STATUS
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1. mpn_mul_1 could be improved to 6.5 cycles/limb on the PA7100, using the
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instructions bwlow (but some sw pipelining is needed to avoid the
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xmpyu-fstds delay):
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fldds s1_ptr
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xmpyu
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fstds N(%r30)
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xmpyu
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fstds N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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addc
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stws res_ptr
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addc
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stws res_ptr
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addib Loop
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2. mpn_addmul_1 could be improved from the current 10 to 7.5 cycles/limb
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(asymptotically) on the PA7100, using the instructions below. With proper
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sw pipelining and the unrolling level below, the speed becomes 8
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cycles/limb.
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fldds s1_ptr
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fldds s1_ptr
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xmpyu
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fstds N(%r30)
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xmpyu
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fstds N(%r30)
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xmpyu
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fstds N(%r30)
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xmpyu
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fstds N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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ldws N(%r30)
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addc
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addc
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addc
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addc
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addc %r0,%r0,cy-limb
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ldws res_ptr
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ldws res_ptr
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ldws res_ptr
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ldws res_ptr
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add
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stws res_ptr
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addc
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stws res_ptr
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addc
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stws res_ptr
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addc
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stws res_ptr
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addib
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@ -1,4 +1,6 @@
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mpih-add1.S
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README
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udiv-qrnnd.S
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mpih-add1.S
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mpih-sub1.S
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mpih-shift.S
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124
mpi/hppa/mpih-shift.S
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124
mpi/hppa/mpih-shift.S
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@ -0,0 +1,124 @@
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/* hppa rshift, lshift
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* Copyright (C) 1992, 1994 Free Software Foundation, Inc.
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* Copyright (c) 1997 by Werner Koch (dd9jn)
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*
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* This file is part of G10.
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*
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* G10 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* G10 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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* Note: This code is heavily based on the GNU MP Library.
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* Actually it's the same code with only minor changes in the
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* way the data is stored; this is to support the abstraction
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* of an optional secure memory allocation which may be used
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* to avoid revealing of sensitive data due to paging etc.
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* The GNU MP Library itself is published under the LGPL;
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* however I decided to publish this code under the plain GPL.
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*/
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/*******************
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* mpi_limb_t
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* mpihelp_lshift( mpi_ptr_t wp, (gr26)
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* mpi_ptr_t up, (gr25)
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* mpi_size_t usize, (gr24)
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* unsigned cnt) (gr23)
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*/
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.code
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.export mpihelp_lshift
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mpihelp_lshift
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.proc
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.callinfo frame=64,no_calls
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.entry
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sh2add %r24,%r25,%r25
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sh2add %r24,%r26,%r26
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ldws,mb -4(0,%r25),%r22
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subi 32,%r23,%r1
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mtsar %r1
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addib,= -1,%r24,L$0004
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vshd %r0,%r22,%r28 ; compute carry out limb
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ldws,mb -4(0,%r25),%r29
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addib,= -1,%r24,L$0002
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vshd %r22,%r29,%r20
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L$loop ldws,mb -4(0,%r25),%r22
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stws,mb %r20,-4(0,%r26)
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addib,= -1,%r24,L$0003
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vshd %r29,%r22,%r20
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ldws,mb -4(0,%r25),%r29
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stws,mb %r20,-4(0,%r26)
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addib,<> -1,%r24,L$loop
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vshd %r22,%r29,%r20
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L$0002 stws,mb %r20,-4(0,%r26)
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vshd %r29,%r0,%r20
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bv 0(%r2)
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stw %r20,-4(0,%r26)
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L$0003 stws,mb %r20,-4(0,%r26)
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L$0004 vshd %r22,%r0,%r20
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bv 0(%r2)
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stw %r20,-4(0,%r26)
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.exit
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.procend
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/*******************
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* mpi_limb_t
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* mpihelp_rshift( mpi_ptr_t wp, (gr26)
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* mpi_ptr_t up, (gr25)
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* mpi_size_t usize, (gr24)
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* unsigned cnt) (gr23)
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*/
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.code
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.export mpihelp_rshift
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mpihelp_rshift
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.proc
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.callinfo frame=64,no_calls
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.entry
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ldws,ma 4(0,%r25),%r22
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mtsar %r23
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addib,= -1,%r24,L$r004
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vshd %r22,%r0,%r28 ; compute carry out limb
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ldws,ma 4(0,%r25),%r29
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addib,= -1,%r24,L$r002
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vshd %r29,%r22,%r20
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L$roop ldws,ma 4(0,%r25),%r22
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stws,ma %r20,4(0,%r26)
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addib,= -1,%r24,L$r003
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vshd %r22,%r29,%r20
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ldws,ma 4(0,%r25),%r29
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stws,ma %r20,4(0,%r26)
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addib,<> -1,%r24,L$roop
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vshd %r29,%r22,%r20
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L$r002 stws,ma %r20,4(0,%r26)
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vshd %r0,%r29,%r20
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bv 0(%r2)
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stw %r20,0(0,%r26)
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L$r003 stws,ma %r20,4(0,%r26)
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L$r004 vshd %r0,%r22,%r20
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bv 0(%r2)
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stw %r20,0(0,%r26)
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.exit
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.procend
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77
mpi/hppa/mpih-sub1.S
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77
mpi/hppa/mpih-sub1.S
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@ -0,0 +1,77 @@
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/* hppa sub_n -- Sub two limb vectors of the same length > 0 and store
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* sum in a third limb vector.
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* Copyright (C) 1992, 1994 Free Software Foundation, Inc.
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* Copyright (c) 1998 by Werner Koch (dd9jn)
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*
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* This file is part of G10.
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*
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* G10 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* G10 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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* Note: This code is heavily based on the GNU MP Library.
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* Actually it's the same code with only minor changes in the
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* way the data is stored; this is to support the abstraction
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* of an optional secure memory allocation which may be used
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* to avoid revealing of sensitive data due to paging etc.
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* The GNU MP Library itself is published under the LGPL;
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* however I decided to publish this code under the plain GPL.
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*/
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#include "sysdep.h"
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#include "asm-syntax.h"
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/*******************
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* mpi_limb_t
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* mpihelp_sub_n( mpi_ptr_t res_ptr, (gr26)
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* mpi_ptr_t s1_ptr, (gr25)
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* mpi_ptr_t s2_ptr, (gr24)
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* mpi_size_t size) (gr23)
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*
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* One might want to unroll this as for other processors, but it turns
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* out that the data cache contention after a store makes such
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* unrolling useless. We can't come under 5 cycles/limb anyway.
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*/
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.code
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.export mpihelp_sub_n
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mpihelp_sub_n
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.proc
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.callinfo frame=0,no_calls
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.entry
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ldws,ma 4(0,%r25),%r20
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ldws,ma 4(0,%r24),%r19
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addib,= -1,%r23,L$end ; check for (SIZE == 1)
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sub %r20,%r19,%r28 ; subtract first limbs ignoring cy
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L$loop ldws,ma 4(0,%r25),%r20
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ldws,ma 4(0,%r24),%r19
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stws,ma %r28,4(0,%r26)
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addib,<> -1,%r23,L$loop
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subb %r20,%r19,%r28
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L$end stws %r28,0(0,%r26)
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addc %r0,%r0,%r28
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bv 0(%r2)
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subi 1,%r28,%r28
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.exit
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.procend
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