1dnl  SPARC v9 mpn_lshiftc
2
3dnl  Contributed to the GNU project by David Miller.
4
5dnl  Copyright 2013 Free Software Foundation, Inc.
6
7dnl  This file is part of the GNU MP Library.
8dnl
9dnl  The GNU MP Library is free software; you can redistribute it and/or modify
10dnl  it under the terms of either:
11dnl
12dnl    * the GNU Lesser General Public License as published by the Free
13dnl      Software Foundation; either version 3 of the License, or (at your
14dnl      option) any later version.
15dnl
16dnl  or
17dnl
18dnl    * the GNU General Public License as published by the Free Software
19dnl      Foundation; either version 2 of the License, or (at your option) any
20dnl      later version.
21dnl
22dnl  or both in parallel, as here.
23dnl
24dnl  The GNU MP Library is distributed in the hope that it will be useful, but
25dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
26dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
27dnl  for more details.
28dnl
29dnl  You should have received copies of the GNU General Public License and the
30dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
31dnl  see https://www.gnu.org/licenses/.
32
33include(`../config.m4')
34
35C                       cycles/limb
36C UltraSPARC 1&2:    3
37C UltraSPARC 3:                3
38C UltraSPARC T1:    17
39C UltraSPARC T3:    10
40C UltraSPARC T4:     3.5
41
42C INPUT PARAMETERS
43define(`rp',     `%i0')
44define(`up',     `%i1')
45define(`n',      `%i2')
46define(`cnt',    `%i3')
47
48define(`tcnt',   `%i4')
49define(`retval', `%i5')
50define(`u0',     `%l0')
51define(`u1',     `%l1')
52define(`r0',     `%l6')
53define(`r1',     `%l7')
54define(`u0_off', `%o0')
55define(`u1_off', `%o1')
56define(`r0_off', `%o2')
57define(`r1_off', `%o3')
58
59ASM_START()
60          REGISTER(%g2,#scratch)
61          REGISTER(%g3,#scratch)
62PROLOGUE(mpn_lshiftc)
63          save      %sp, -176, %sp
64
65          sllx      n, 3, n
66          sub       %g0, cnt, tcnt
67
68          sub       up, 8, u1_off
69          add       rp, (5 * 8), r1_off
70
71          ldx       [n + u1_off], u1    C WAS: up - 8
72          add       u1_off, (3 * 8), u1_off
73
74          sub       r1_off, 8, r0_off
75          sub       u1_off, 8, u0_off
76
77          subcc     n, (3 * 8), n
78          srlx      u1, tcnt, retval
79
80          bl,pn     %xcc, L(end12)
81           sllx     u1, cnt, %l3
82
83          ldx       [n + u0_off], u0    C WAS: up - 16
84          subcc     n, (2 * 8), n
85
86          ldx       [n + u1_off], u1    C WAS: up - 24
87
88          bl,pn     %xcc, L(end34)
89           srlx     u0, tcnt, %l4
90
91          b,a       L(top)
92          ALIGN(16)
93L(top):
94          not       %l3, %l3
95          sllx      u0, cnt, %l2
96
97          andn      %l3, %l4, r0
98          ldx       [n + u0_off], u0    C WAS: up - 16
99
100          srlx      u1, tcnt, %l5
101          stx       r0, [n + r0_off]    C WAS: rp - 8
102
103          subcc     n, (2 * 8), n
104          not       %l2, %l2
105
106          sllx      u1, cnt, %l3
107          andn      %l2, %l5, r1
108
109          ldx       [n + u1_off], u1    C WAS: up - 24
110          srlx      u0, tcnt, %l4
111
112          bge,pt    %xcc, L(top)
113           stx      r1, [n + r1_off]    C WAS: rp - 16
114
115L(end34):
116          not       %l3, %l3
117          sllx      u0, cnt, %l2
118
119          andn      %l3, %l4, r0
120          srlx      u1, tcnt, %l5
121
122          stx       r0, [n + r0_off]    C WAS: rp - 8
123          not       %l2, %l2
124
125          andn      %l2, %l5, r1
126          sub       n, (2 * 8), %o5
127
128          sllx      u1, cnt, %l3
129          stx       r1, [%o5 + r1_off]  C WAS: rp - 16
130
131L(end12):
132          andcc     n, 8, %g0
133          bz        %xcc, L(done)+4
134           not      %l3, %l3
135
136          ldx       [n + u0_off], u1
137          srlx      u1, tcnt, %l4
138          andn      %l3, %l4, r0
139          stx       r0, [r0_off - 24]
140          sllx      u1, cnt, %l3
141L(done):
142          not       %l3, %l3
143          stx       %l3, [r0_off - 32]
144
145          ret
146          restore retval, 0, %o0
147EPILOGUE()
148