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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /sysdeps/hppa/add_n.s
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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
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diff --git a/sysdeps/hppa/add_n.s b/sysdeps/hppa/add_n.s
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+;! HP-PA __mpn_add_n -- Add two limb vectors of the same length > 0 and store
+;! sum in a third limb vector.
+
+;! Copyright (C) 1992, 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 gr26
+;! s1_ptr gr25
+;! s2_ptr gr24
+;! size gr23
+
+;! One might want to unroll this as for other processors, but it turns
+;! out that the data cache contention after a store makes such
+;! unrolling useless. We can't come under 5 cycles/limb anyway.
+
+ .text
+ .export __mpn_add_n
+__mpn_add_n:
+ .proc
+ .callinfo frame=0,no_calls
+ .entry
+
+ ldws,ma 4(0,%r25),%r21
+ ldws,ma 4(0,%r24),%r20
+
+ addib,= -1,%r23,L$end ;! check for (SIZE == 1)
+ add %r21,%r20,%r28 ;! add first limbs ignoring cy
+
+L$loop: ldws,ma 4(0,%r25),%r21
+ ldws,ma 4(0,%r24),%r20
+ stws,ma %r28,4(0,%r26)
+ addib,<> -1,%r23,L$loop
+ addc %r21,%r20,%r28
+
+L$end: stws %r28,0(0,%r26)
+ bv 0(%r2)
+ addc %r0,%r0,%r28
+
+ .exit
+ .procend