1 ; HP-PA 2.0 64-bit __gmpn_submul_1 -- Multiply a limb vector with a limb and
2 ; subtract the result from a second limb vector.
4 ; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
6 ; This file is part of the GNU MP Library.
8 ; The GNU MP Library is free software; you can redistribute it and/or modify
9 ; it under the terms of the GNU Lesser General Public License as published by
10 ; the Free Software Foundation; either version 2.1 of the License, or (at your
11 ; option) any later version.
13 ; The GNU MP Library is distributed in the hope that it will be useful, but
14 ; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 ; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 ; License for more details.
18 ; You should have received a copy of the GNU Lesser General Public License
19 ; along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20 ; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
27 #define s2limb -56(%r30)
29 ; This runs at 11 cycles/limb on a PA8000. It might be possible to make
30 ; it faster, but the PA8000 pipeline is not publically documented and it
31 ; is very complex to reverse engineer
46 .export __gmpn_submul_1,entry
49 .callinfo frame=128,no_calls
51 fldd -56(%r30),%fr5 ; s2limb passed on stack
53 add %r0,%r0,cylimb ; clear cy and cylimb
64 xmpyu %fr5R,%fr4R,%fr6
66 xmpyu %fr5R,%fr4L,%fr7
68 xmpyu %fr5L,%fr4R,%fr8
70 xmpyu %fr5L,%fr4L,%fr9
72 ldd -128(%r30),lo ; lo = low 64 bit of product
73 ldd -120(%r30),m0 ; m0 = mid0 64 bit of product
74 ldd -112(%r30),m1 ; m1 = mid1 64 bit of product
75 ldd -104(%r30),hi ; hi = high 64 bit of product
76 addib,= -1,%r24,L$end1
80 addib,= -1,%r24,L$end2
83 xmpyu %fr5R,%fr4R,%fr6
85 xmpyu %fr5R,%fr4L,%fr7
87 xmpyu %fr5L,%fr4R,%fr8
89 xmpyu %fr5L,%fr4L,%fr9
92 extrd,u lo,31,32,t1 ; t1 = hi32(lo)
93 extrd,u lo,63,32,t4 ; t4 = lo32(lo)
94 add,l m0,t1,t1 ; t1 += m0
95 add,l,*nuv m1,t1,t1 ; t1 += m1
96 add,l %r5,hi,hi ; propagate carry
97 extrd,u t1,31,32,t2 ; t2 = hi32(t1)
98 depd,z t1,31,32,t5 ; t5 = lo32(t1)
99 add,l t5,t4,t4 ; t4 += lo32(t1)
100 ldd -128(%r30),lo ; lo = low 64 bit of product
102 ldd -120(%r30),m0 ; m0 = mid0 64 bit of product
104 ldd -112(%r30),m1 ; m1 = mid1 64 bit of product
107 ldd -104(%r30),hi ; hi = high 64 bit of product
108 add,dc %r0,cylimb,cylimb
112 addib,<> -1,%r24,L$loop
115 xmpyu %fr5R,%fr4R,%fr6
117 xmpyu %fr5R,%fr4L,%fr7
119 xmpyu %fr5L,%fr4R,%fr8
121 xmpyu %fr5L,%fr4L,%fr9
124 extrd,u lo,31,32,t1 ; t1 = hi32(lo)
125 extrd,u lo,63,32,t4 ; t4 = lo32(lo)
126 add,l m0,t1,t1 ; t1 += m0
127 add,l,*nuv m1,t1,t1 ; t1 += m0
128 add,l %r5,hi,hi ; propagate carry
129 extrd,u t1,31,32,t2 ; t2 = hi32(t1)
130 depd,z t1,31,32,t5 ; t5 = lo32(t1)
131 add,l t5,t4,t4 ; t4 += lo32(t1)
132 ldd -128(%r30),lo ; lo = low 64 bit of product
134 ldd -120(%r30),m0 ; m0 = mid0 64 bit of product
136 ldd -112(%r30),m1 ; m1 = mid1 64 bit of product
139 ldd -104(%r30),hi ; hi = high 64 bit of product
140 add,dc %r0,cylimb,cylimb
145 extrd,u lo,31,32,t1 ; t1 = hi32(lo)
146 extrd,u lo,63,32,t4 ; t4 = lo32(lo)
147 add,l m0,t1,t1 ; t1 += m0
148 add,l,*nuv m1,t1,t1 ; t1 += m0
149 add,l %r5,hi,hi ; propagate carry
150 extrd,u t1,31,32,t2 ; t2 = hi32(t1)
151 depd,z t1,31,32,t5 ; t5 = lo32(t1)
152 add,l t5,t4,t4 ; t4 += lo32(t1)
157 add,dc %r0,cylimb,cylimb
166 extrd,u cylimb,31,32,%r28