1dnl  S/390-32 mpn_lshiftc.
2
3dnl  Copyright 2011 Free Software Foundation, Inc.
4
5dnl  This file is part of the GNU MP Library.
6dnl
7dnl  The GNU MP Library is free software; you can redistribute it and/or modify
8dnl  it under the terms of either:
9dnl
10dnl    * the GNU Lesser General Public License as published by the Free
11dnl      Software Foundation; either version 3 of the License, or (at your
12dnl      option) any later version.
13dnl
14dnl  or
15dnl
16dnl    * the GNU General Public License as published by the Free Software
17dnl      Foundation; either version 2 of the License, or (at your option) any
18dnl      later version.
19dnl
20dnl  or both in parallel, as here.
21dnl
22dnl  The GNU MP Library is distributed in the hope that it will be useful, but
23dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
24dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
25dnl  for more details.
26dnl
27dnl  You should have received copies of the GNU General Public License and the
28dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
29dnl  see https://www.gnu.org/licenses/.
30
31include(`../config.m4')
32
33C            cycles/limb
34C z900		 7
35C z990	         3.375
36C z9		 ?
37C z10		 ?
38C z196		 ?
39
40C TODO
41C  *
42
43C INPUT PARAMETERS
44define(`rp',	`%r2')
45define(`up',	`%r3')
46define(`n',	`%r4')
47define(`cnt',	`%r5')
48
49ASM_START()
50PROLOGUE(mpn_lshiftc)
51	lr	%r1, n
52	sll	%r1, 2
53	stm	%r6, %r13, 24(%r15)
54	la	up, 0(%r1,up)		C put up near end of U
55	la	rp, 0(%r1,rp)		C put rp near end of R
56	ahi	up, -20
57	ahi	rp, -16
58	lhi	%r8, 32
59	sr	%r8, cnt
60	l	%r12, 16(up)
61	srl	%r12, 0(%r8)		C return value
62	lhi	%r13, -1
63	lhi	%r7, 3
64	nr	%r7, n
65	srl	n, 2
66	je	L(b0)
67	chi	%r7, 2
68	jl	L(b1)
69	je	L(b2)
70
71L(b3):	l	%r10, 16(up)
72	l	%r11, 12(up)
73	l	%r9,   8(up)
74	ahi	up, -8
75	lr	%r8, %r11
76	sldl	%r10, 0(cnt)
77	sldl	%r8,  0(cnt)
78	xr	%r10, %r13
79	xr	%r8, %r13
80	st	%r10, 12(rp)
81	st	%r8,   8(rp)
82	ahi	rp, -8
83	ltr	n, n
84	je	L(end)
85	j	L(top)
86
87L(b2):	l	%r10, 16(up)
88	l	%r11, 12(up)
89	ahi	up, -4
90	sldl	%r10, 0(cnt)
91	xr	%r10, %r13
92	st	%r10, 12(rp)
93	ahi	rp, -4
94	ltr	n, n
95	je	L(end)
96	j	L(top)
97
98L(b1):	ltr	n, n
99	je	L(end)
100	j	L(top)
101
102L(b0):	l	%r10,16(up)
103	l	%r8, 12(up)
104	l	%r6,  8(up)
105	l	%r0,  4(up)
106	ahi	up, -12
107	lr	%r11, %r8
108	lr	%r9,  %r6
109	lr	%r7,  %r0
110	sldl	%r10,0(cnt)
111	sldl	%r8, 0(cnt)
112	sldl	%r6, 0(cnt)
113	xr	%r10, %r13
114	xr	%r8, %r13
115	xr	%r6, %r13
116	st	%r10, 12(rp)
117	st	%r8,   8(rp)
118	st	%r6,   4(rp)
119	ahi	rp, -12
120	ahi	n, -1
121	je	L(end)
122
123	ALIGN(8)
124L(top):	l	%r10, 16(up)
125	l	%r8,  12(up)
126	l	%r6,   8(up)
127	l	%r0,   4(up)
128	l	%r1,   0(up)
129	lr	%r11, %r8
130	lr	%r9,  %r6
131	lr	%r7,  %r0
132	ahi	up, -16
133	sldl	%r10, 0(cnt)
134	sldl	%r8,  0(cnt)
135	sldl	%r6,  0(cnt)
136	sldl	%r0,  0(cnt)
137	xr	%r10, %r13
138	xr	%r8, %r13
139	xr	%r6, %r13
140	xr	%r0, %r13
141	st	%r10, 12(rp)
142	st	%r8,   8(rp)
143	st	%r6,   4(rp)
144	st	%r0,   0(rp)
145	ahi	rp, -16
146	brct	n, L(top)
147
148L(end):	l	%r10, 16(up)
149	sll	%r10, 0(cnt)
150	xr	%r10, %r13
151	st	%r10, 12(rp)
152
153	lr	%r2, %r12
154	lm	%r6, %r13, 24(%r15)
155	br	%r14
156EPILOGUE()
157