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1 
#
 1 
#
2 
# Copyright (C) 2005 Jakub Jermar
 2 
# Copyright (C) 2005 Jakub Jermar
3 
# All rights reserved.
 3 
# All rights reserved.
4 
#
 4 
#
5 
# Redistribution and use in source and binary forms, with or without
 5 
# Redistribution and use in source and binary forms, with or without
6 
# modification, are permitted provided that the following conditions
 6 
# modification, are permitted provided that the following conditions
7 
# are met:
 7 
# are met:
8 
#
 8 
#
9 
# - Redistributions of source code must retain the above copyright
 9 
# - Redistributions of source code must retain the above copyright
10 
#   notice, this list of conditions and the following disclaimer.
 10 
#   notice, this list of conditions and the following disclaimer.
11 
# - Redistributions in binary form must reproduce the above copyright
 11 
# - Redistributions in binary form must reproduce the above copyright
12 
#   notice, this list of conditions and the following disclaimer in the
 12 
#   notice, this list of conditions and the following disclaimer in the
13 
#   documentation and/or other materials provided with the distribution.
 13 
#   documentation and/or other materials provided with the distribution.
14 
# - The name of the author may not be used to endorse or promote products
 14 
# - The name of the author may not be used to endorse or promote products
15 
#   derived from this software without specific prior written permission.
 15 
#   derived from this software without specific prior written permission.
16 
#
 16 
#
17 
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 17 
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 18 
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 19 
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 20 
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 21 
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 22 
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 23 
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 24 
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 25 
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 26 
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
#
 27 
#
28 
 
 28 
 
29 
.text
 29 
.text
30 
 
 30 
 
31 
.global context_save
 31 
.global context_save
32 
.global context_restore
 32 
.global context_restore
33 
 
 33 
 
34 
context_save:
 34 
context_save:
35 
	alloc loc0 = ar.pfs, 1, 11, 0, 0
 35 
	alloc loc0 = ar.pfs, 1, 8, 0, 0
36 
	mov loc1 = ar.unat	;;
 36 
	mov loc1 = ar.unat	;;
37 
	/* loc2 */
 37 
	/* loc2 */
38 
	mov loc3 = ar.rsc
 38 
	mov loc3 = ar.rsc
39 
 
 39 
 
40 
	.auto
 40 
	.auto
41 
 
 41 
 
42 
	/*
 42 
	/*
43 
	 * Flush dirty registers to backing store.
 43 
	 * Flush dirty registers to backing store.
44 
	 * After this ar.bsp and ar.bspstore are equal.
 44 
	 * After this ar.bsp and ar.bspstore are equal.
45 
	 */
 45 
	 */
46 
	flushrs
 46 
	flushrs
47 
	mov loc4 = ar.bsp
47 
	mov loc4 = ar.bsp
48
48
49 
	/*
 49 
	/*
50 
	 * Put RSE to enforced lazy mode.
 50 
	 * Put RSE to enforced lazy mode.
51 
	 * So that ar.rnat can be read.
 51 
	 * So that ar.rnat can be read.
52 
	 */
 52 
	 */
53 
	movl loc5 = ~3
 53 
	movl loc5 = ~3
54 
	and loc5 = loc3, loc5
 54 
	and loc5 = loc3, loc5
55 
	mov ar.rsc = loc5
 55 
	mov ar.rsc = loc5
56 
	mov loc5 = ar.rnat
 56 
	mov loc5 = ar.rnat
57 
 
 57 
 
58 
	.explicit
 58 
	.explicit
59 
 
 59 
 
60 
	mov loc6 = ar.lc
 60 
	mov loc6 = ar.lc
61 
	mov loc7 = ar.ec
 - 
 
62 
	mov loc8 = ar.ccv
 - 
 
63 
	mov loc9 = ar.csd
 - 
 
64 
	mov loc10 = ar.ssd
 - 
 
65
61
66 
	/*
 62 
	/*
67 
	 * Save application registers
 63 
	 * Save application registers
68 
	 */
 64 
	 */
69 
	st8 [in0] = loc0, 8	;;	/* save ar.pfs */
 65 
	st8 [in0] = loc0, 8	;;	/* save ar.pfs */
70 
	st8 [in0] = loc1, 8	;;	/* save ar.unat (caller) */
 66 
	st8 [in0] = loc1, 8	;;	/* save ar.unat (caller) */
71 
	mov loc2 = in0		;;
 67 
	mov loc2 = in0		;;
72 
	add in0 = 8, in0	;;	/* skip ar.unat (callee) */
 68 
	add in0 = 8, in0	;;	/* skip ar.unat (callee) */
73 
	st8 [in0] = loc3, 8	;;	/* save ar.rsc */
 69 
	st8 [in0] = loc3, 8	;;	/* save ar.rsc */
74 
	st8 [in0] = loc4, 8	;;	/* save ar.bsp */
 70 
	st8 [in0] = loc4, 8	;;	/* save ar.bsp */
75 
	st8 [in0] = loc5, 8	;;	/* save ar.rnat */
 71 
	st8 [in0] = loc5, 8	;;	/* save ar.rnat */
76 
	st8 [in0] = loc6, 8	;;	/* save ar.lc */
 72 
	st8 [in0] = loc6, 8	;;	/* save ar.lc */
77 
	st8 [in0] = loc7, 8	;;	/* save ar.ec */
 - 
 
78 
	st8 [in0] = loc8, 8	;;	/* save ar.ccv */
 - 
 
79 
	st8 [in0] = loc9, 8	;;	/* save ar.csd */
 - 
 
80 
	st8 [in0] = loc10, 8	;;	/* save ar.ssd */
- 
 
81
73
82 
	/*
 74 
	/*
83 
	 * Save general registers including NaT bits
 75 
	 * Save general registers including NaT bits
84 
	 */
 76 
	 */
85 
	st8.spill [in0] = r1, 8		;;
 77 
	st8.spill [in0] = r1, 8		;;
86 
	st8.spill [in0] = r2, 8		;;
 - 
 
87 
	st8.spill [in0] = r3, 8		;;
 - 
 
88 
	st8.spill [in0] = r4, 8		;;
 78 
	st8.spill [in0] = r4, 8		;;
89 
	st8.spill [in0] = r5, 8		;;
 79 
	st8.spill [in0] = r5, 8		;;
90 
	st8.spill [in0] = r6, 8		;;
 80 
	st8.spill [in0] = r6, 8		;;
91 
	st8.spill [in0] = r7, 8		;;
 81 
	st8.spill [in0] = r7, 8		;;
92 
	st8.spill [in0] = r8, 8		;;
 - 
 
93 
	st8.spill [in0] = r9, 8		;;
 - 
 
94 
	st8.spill [in0] = r10, 8	;;
 - 
 
95 
	st8.spill [in0] = r11, 8	;;
 - 
 
96 
	st8.spill [in0] = r12, 8	;;	/* save sp */
 82 
	st8.spill [in0] = r12, 8	;;	/* save sp */
97 
	st8.spill [in0] = r13, 8	;;
 83 
	st8.spill [in0] = r13, 8	;;
98 
	st8.spill [in0] = r14, 8	;;
 - 
 
99 
	st8.spill [in0] = r15, 8	;;
 - 
 
100 
	st8.spill [in0] = r16, 8	;;
 - 
 
101 
	st8.spill [in0] = r17, 8	;;
 - 
 
102 
	st8.spill [in0] = r18, 8	;;
 - 
 
103 
	st8.spill [in0] = r19, 8	;;
 - 
 
104 
	st8.spill [in0] = r20, 8	;;
 - 
 
105 
	st8.spill [in0] = r21, 8	;;
 - 
 
106 
	st8.spill [in0] = r22, 8	;;
 - 
 
107 
	st8.spill [in0] = r23, 8	;;
 - 
 
108 
	st8.spill [in0] = r24, 8	;;
 - 
 
109 
	st8.spill [in0] = r25, 8	;;
 - 
 
110 
	st8.spill [in0] = r26, 8	;;
 - 
 
111 
	st8.spill [in0] = r27, 8	;;
 - 
 
112 
	st8.spill [in0] = r28, 8	;;
 - 
 
113 
	st8.spill [in0] = r29, 8	;;
 - 
 
114 
	st8.spill [in0] = r30, 8	;;
 - 
 
115 
	st8.spill [in0] = r31, 8	;;
 - 
 
116 
 
 84 
 
117 
	mov loc3 = ar.unat		;;
 85 
	mov loc3 = ar.unat		;;
118 
	st8 [loc2] = loc3		/* save ar.unat (callee) */
 86 
	st8 [loc2] = loc3		/* save ar.unat (callee) */
119 
 
 87 
 
120 
	/*
 88 
	/*
121 
	 * Save branch registers
 89 
	 * Save branch registers
122 
	 */
 90 
	 */
123 
	mov loc2 = b0		;;
 91 
	mov loc2 = b0		;;
124 
	st8 [in0] = loc2, 8		/* save pc */
 92 
	st8 [in0] = loc2, 8		/* save pc */
125 
	mov loc3 = b1		;;
 93 
	mov loc3 = b1		;;
126 
	st8 [in0] = loc3, 8
 94 
	st8 [in0] = loc3, 8
127 
	mov loc4 = b2		;;
 95 
	mov loc4 = b2		;;
128 
	st8 [in0] = loc4, 8
 96 
	st8 [in0] = loc4, 8
129 
	mov loc5 = b3		;;
 97 
	mov loc5 = b3		;;
130 
	st8 [in0] = loc5, 8
 98 
	st8 [in0] = loc5, 8
131 
	mov loc6 = b4		;;
 99 
	mov loc6 = b4		;;
132 
	st8 [in0] = loc6, 8
 100 
	st8 [in0] = loc6, 8
133 
	mov loc7 = b5		;;
 101 
	mov loc7 = b5		;;
134 
	st8 [in0] = loc7, 8
 102 
	st8 [in0] = loc7, 8
135 
	mov loc8 = b6		;;
 - 
 
136 
	st8 [in0] = loc8, 8
 - 
 
137 
	mov loc9 = b7		;;
 - 
 
138 
	st8 [in0] = loc9, 8
 - 
 
139 
 
 103 
 
140 
	/*
 104 
	/*
141 
	 * Save predicate registers
 105 
	 * Save predicate registers
142 
	 */
 106 
	 */
143 
	mov loc2 = pr		;;
 107 
	mov loc2 = pr		;;
144 
	st8 [in0] = loc2, 8
 108 
	st8 [in0] = loc2, 8
145
109
146 
	mov ar.pfs = loc0
 110 
	mov ar.pfs = loc0
147 
	mov ar.unat = loc1
 111 
	mov ar.unat = loc1
148
112
149 
	add r8 = r0, r0, 1 		/* context_save returns 1 */
 113 
	add r8 = r0, r0, 1 		/* context_save returns 1 */
150 
	br.ret.sptk.many b0
 114 
	br.ret.sptk.many b0
151 
 
 115 
 
152 
context_restore:
 116 
context_restore:
153 
	alloc loc0 = ar.pfs, 1, 11, 0, 0	;;
 117 
	alloc loc0 = ar.pfs, 1, 8, 0, 0	;;
154 
 
 118 
 
155 
	ld8 loc0 = [in0], 8	;;	/* load ar.pfs */
 119 
	ld8 loc0 = [in0], 8	;;	/* load ar.pfs */
156 
	ld8 loc1 = [in0], 8	;;	/* load ar.unat (caller) */
 120 
	ld8 loc1 = [in0], 8	;;	/* load ar.unat (caller) */
157 
	ld8 loc2 = [in0], 8	;;	/* load ar.unat (callee) */
 121 
	ld8 loc2 = [in0], 8	;;	/* load ar.unat (callee) */
158 
	ld8 loc3 = [in0], 8	;;	/* load ar.rsc */
 122 
	ld8 loc3 = [in0], 8	;;	/* load ar.rsc */
159 
	ld8 loc4 = [in0], 8	;;	/* load ar.bsp */
 123 
	ld8 loc4 = [in0], 8	;;	/* load ar.bsp */
160 
	ld8 loc5 = [in0], 8	;;	/* load ar.rnat */
 124 
	ld8 loc5 = [in0], 8	;;	/* load ar.rnat */
161 
	ld8 loc6 = [in0], 8	;;	/* load ar.lc */
 125 
	ld8 loc6 = [in0], 8	;;	/* load ar.lc */
162 
	ld8 loc7 = [in0], 8	;;	/* load ar.ec */
 - 
 
163 
	ld8 loc8 = [in0], 8	;;	/* load ar.ccv */
 - 
 
164 
	ld8 loc9 = [in0], 8	;;	/* load ar.csd */
 - 
 
165 
	ld8 loc10 = [in0], 8	;;	/* load ar.ssd */
 - 
 
166
126
167 
	.auto
127 
	.auto
168 
 
 128 
 
169 
	/*
 129 
	/*
170 
	 * Invalidate the ALAT
 130 
	 * Invalidate the ALAT
171 
	 */
 131 
	 */
172 
	invala
 132 
	invala
173 
 
 133 
 
174 
	/*
 134 
	/*
175 
	 * Restore application registers
 135 
	 * Restore application registers
176 
	 */
 136 
	 */
177 
 
 137 
 
178 
	mov ar.bspstore = loc4
 138 
	mov ar.bspstore = loc4
179 
	mov ar.rnat = loc5
 139 
	mov ar.rnat = loc5
180 
	mov ar.pfs = loc0
 140 
	mov ar.pfs = loc0
181 
	mov ar.rsc = loc3
 141 
	mov ar.rsc = loc3
182 
 
 142 
 
183 
	.explicit
 143 
	.explicit
184 
 
 144 
 
185 
	mov ar.unat = loc2	;;
 145 
	mov ar.unat = loc2	;;
186 
	mov ar.lc = loc6
 146 
	mov ar.lc = loc6
187 
	mov ar.ec = loc7
 - 
 
188 
	mov ar.ccv = loc8
 - 
 
189 
	mov ar.csd = loc9
 - 
 
190 
	mov ar.ssd = loc10
 - 
 
191
147
192 
	/*
 148 
	/*
193 
	 * Restore general registers including NaT bits
 149 
	 * Restore general registers including NaT bits
194 
	 */
 150 
	 */
195 
	ld8.fill r1 = [in0], 8	;;
 151 
	ld8.fill r1 = [in0], 8	;;
196 
	ld8.fill r2 = [in0], 8	;;
 - 
 
197 
	ld8.fill r3 = [in0], 8	;;
 - 
 
198 
	ld8.fill r4 = [in0], 8	;;
 152 
	ld8.fill r4 = [in0], 8	;;
199 
	ld8.fill r5 = [in0], 8	;;
 153 
	ld8.fill r5 = [in0], 8	;;
200 
	ld8.fill r6 = [in0], 8	;;
 154 
	ld8.fill r6 = [in0], 8	;;
201 
	ld8.fill r7 = [in0], 8	;;
 155 
	ld8.fill r7 = [in0], 8	;;
202 
	ld8.fill r8 = [in0], 8	;;
 - 
 
203 
	ld8.fill r9 = [in0], 8	;;
 - 
 
204 
	ld8.fill r10 = [in0], 8	;;
 - 
 
205 
	ld8.fill r11 = [in0], 8	;;
 - 
 
206 
	ld8.fill r12 = [in0], 8	;;	/* restore sp */
 156 
	ld8.fill r12 = [in0], 8	;;	/* restore sp */
207 
	ld8.fill r13 = [in0], 8	;;
 157 
	ld8.fill r13 = [in0], 8	;;
208 
	ld8.fill r14 = [in0], 8	;;
 - 
 
209 
	ld8.fill r15 = [in0], 8	;;
 - 
 
210 
	ld8.fill r16 = [in0], 8	;;
 - 
 
211 
	ld8.fill r17 = [in0], 8	;;
 - 
 
212 
	ld8.fill r18 = [in0], 8	;;
 - 
 
213 
	ld8.fill r19 = [in0], 8	;;
 - 
 
214 
	ld8.fill r20 = [in0], 8	;;
 - 
 
215 
	ld8.fill r21 = [in0], 8	;;
 - 
 
216 
	ld8.fill r22 = [in0], 8	;;
 - 
 
217 
	ld8.fill r23 = [in0], 8	;;
 - 
 
218 
	ld8.fill r24 = [in0], 8	;;
 - 
 
219 
	ld8.fill r25 = [in0], 8	;;
 - 
 
220 
	ld8.fill r26 = [in0], 8	;;
 - 
 
221 
	ld8.fill r27 = [in0], 8	;;
 - 
 
222 
	ld8.fill r28 = [in0], 8	;;
 - 
 
223 
	ld8.fill r29 = [in0], 8	;;
 - 
 
224 
	ld8.fill r30 = [in0], 8	;;
 - 
 
225 
	ld8.fill r31 = [in0], 8	;;
 - 
 
226 
 
 158 
 
227 
	/*
159 
	/*
228 
	 * Restore branch registers
 160 
	 * Restore branch registers
229 
	 */
 161 
	 */
230 
	ld8 loc2 = [in0], 8	;;	/* restore pc */
 162 
	ld8 loc2 = [in0], 8	;;	/* restore pc */
231 
	mov b0 = loc2
 163 
	mov b0 = loc2
232 
	ld8 loc3 = [in0], 8	;;
 164 
	ld8 loc3 = [in0], 8	;;
233 
	mov b1 = loc3
 165 
	mov b1 = loc3
234 
	ld8 loc4 = [in0], 8	;;
 166 
	ld8 loc4 = [in0], 8	;;
235 
	mov b2 = loc4
 167 
	mov b2 = loc4
236 
	ld8 loc5 = [in0], 8	;;
 168 
	ld8 loc5 = [in0], 8	;;
237 
	mov b3 = loc5
 169 
	mov b3 = loc5
238 
	ld8 loc6 = [in0], 8	;;
 170 
	ld8 loc6 = [in0], 8	;;
239 
	mov b4 = loc6
 171 
	mov b4 = loc6
240 
	ld8 loc7 = [in0], 8	;;
 172 
	ld8 loc7 = [in0], 8	;;
241 
	mov b5 = loc7
 173 
	mov b5 = loc7
242 
	ld8 loc8 = [in0], 8	;;
 - 
 
243 
	mov b6 = loc8
 - 
 
244 
	ld8 loc9 = [in0], 8	;;
 - 
 
245 
	mov b7 = loc9
 - 
 
246 
 
 174 
 
247 
	/*
 175 
	/*
248 
	 * Restore predicate registers
 176 
	 * Restore predicate registers
249 
	 */
 177 
	 */
250 
	ld8 loc2 = [in0], 8	;;
 178 
	ld8 loc2 = [in0], 8	;;
251 
	mov pr = loc2, ~0
 179 
	mov pr = loc2, ~0
252
180
253 
	mov ar.unat = loc1
 181 
	mov ar.unat = loc1
254
182
255 
	mov r8 = r0			/* context_restore returns 0 */
 183 
	mov r8 = r0			/* context_restore returns 0 */
256 
	br.ret.sptk.many b0
 184 
	br.ret.sptk.many b0
257 
 
 185