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+;! HP-PA-1.1 __mpn_addmul_1 -- Multiply a limb vector with a limb and
+;! add the result to 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 11 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 10 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.
+
+ .text
+ .export __mpn_addmul_1
+__mpn_addmul_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$loop:
+ ldws 0(%r26),%r29
+ fldws,ma 4(%r25),%fr5
+ add %r29,%r20,%r20
+ stws,ma %r20,4(%r26)
+ addc %r28,%r1,%r20
+ xmpyu %fr4,%fr5,%fr6
+ ldw -16(%r30),%r28
+ fstds %fr6,-16(%r30)
+ addc %r0,%r28,%r28
+ addib,<> -1,%r24,L$loop
+ ldw -12(%r30),%r1
+
+L$end:
+ ldw 0(%r26),%r29
+ add %r29,%r20,%r20
+ stws,ma %r20,4(%r26)
+ addc %r28,%r1,%r20
+ ldw -16(%r30),%r28
+ ldws 0(%r26),%r29
+ addc %r0,%r28,%r28
+ add %r29,%r20,%r20
+ stws,ma %r20,4(%r26)
+ addc %r0,%r28,%r28
+ bv 0(%r2)
+ ldo -64(%r30),%r30
+
+L$just_one_limb:
+ xmpyu %fr4,%fr5,%fr6
+ ldw 0(%r26),%r29
+ fstds %fr6,-16(%r30)
+ ldw -12(%r30),%r1
+ ldw -16(%r30),%r28
+ add %r29,%r1,%r20
+ stw %r20,0(%r26)
+ addc %r0,%r28,%r28
+ bv 0(%r2)
+ ldo -64(%r30),%r30
+
+ .exit
+ .procend