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1 | /* | |
2 | Copyright Oliver Kowalke 2009. | |
3 | Distributed under the Boost Software License, Version 1.0. | |
4 | (See accompanying file LICENSE_1_0.txt or copy at | |
5 | http://www.boost.org/LICENSE_1_0.txt) | |
6 | */ | |
7 | ||
8 | /****************************************************** | |
9 | * * | |
10 | * ------------------------------------------------- * | |
11 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | * | |
12 | * ------------------------------------------------- * | |
13 | * | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | * | |
14 | * ------------------------------------------------- * | |
15 | * | F14 | F15 | F16 | F17 | * | |
16 | * ------------------------------------------------- * | |
17 | * ------------------------------------------------- * | |
18 | * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * | |
19 | * ------------------------------------------------- * | |
20 | * | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | * | |
21 | * ------------------------------------------------- * | |
22 | * | F18 | F19 | F20 | F21 | * | |
23 | * ------------------------------------------------- * | |
24 | * ------------------------------------------------- * | |
25 | * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | * | |
26 | * ------------------------------------------------- * | |
27 | * | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | * | |
28 | * ------------------------------------------------- * | |
29 | * | F22 | F23 | F24 | F25 | * | |
30 | * ------------------------------------------------- * | |
31 | * ------------------------------------------------- * | |
32 | * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | * | |
33 | * ------------------------------------------------- * | |
34 | * | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | * | |
35 | * ------------------------------------------------- * | |
36 | * | F26 | F27 | F28 | F29 | * | |
37 | * ------------------------------------------------- * | |
38 | * ------------------------------------------------- * | |
39 | * | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | * | |
40 | * ------------------------------------------------- * | |
41 | * | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | * | |
42 | * ------------------------------------------------- * | |
43 | * | F30 | F31 | fpscr | R13 | R14 | * | |
44 | * ------------------------------------------------- * | |
45 | * ------------------------------------------------- * | |
46 | * | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | * | |
47 | * ------------------------------------------------- * | |
48 | * | 160 | 164 | 168 | 172 | 176 | 180 | 184 | 188 | * | |
49 | * ------------------------------------------------- * | |
50 | * | R15 | R16 | R17 | R18 | R19 | R20 | R21 | R22 | * | |
51 | * ------------------------------------------------- * | |
52 | * ------------------------------------------------- * | |
53 | * | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | * | |
54 | * ------------------------------------------------- * | |
55 | * | 192 | 196 | 200 | 204 | 208 | 212 | 216 | 220 | * | |
56 | * ------------------------------------------------- * | |
57 | * | R23 | R24 | R25 | R26 | R27 | R28 | R29 | R30 | * | |
58 | * ------------------------------------------------- * | |
59 | * ------------------------------------------------- * | |
60 | * | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | * | |
61 | * ------------------------------------------------- * | |
62 | * | 224 | 228 | 232 | 236 | 240 | 244 | 248 | 252 | * | |
63 | * ------------------------------------------------- * | |
64 | * | R31 |hiddn| CR | LR | PC |bchai|linkr| FCTX| * | |
65 | * ------------------------------------------------- * | |
66 | * ------------------------------------------------- * | |
67 | * | 64 | | * | |
68 | * ------------------------------------------------- * | |
69 | * | 256 | | * | |
70 | * ------------------------------------------------- * | |
71 | * | DATA| | * | |
72 | * ------------------------------------------------- * | |
73 | * * | |
74 | *******************************************************/ | |
75 | ||
76 | .text | |
77 | .globl _ontop_fcontext | |
78 | .align 2 | |
79 | _ontop_fcontext: | |
80 | # reserve space on stack | |
81 | subi r1, r1, 244 | |
82 | ||
83 | stfd f14, 0(r1) # save F14 | |
84 | stfd f15, 8(r1) # save F15 | |
85 | stfd f16, 16(r1) # save F16 | |
86 | stfd f17, 24(r1) # save F17 | |
87 | stfd f18, 32(r1) # save F18 | |
88 | stfd f19, 40(r1) # save F19 | |
89 | stfd f20, 48(r1) # save F20 | |
90 | stfd f21, 56(r1) # save F21 | |
91 | stfd f22, 64(r1) # save F22 | |
92 | stfd f23, 72(r1) # save F23 | |
93 | stfd f24, 80(r1) # save F24 | |
94 | stfd f25, 88(r1) # save F25 | |
95 | stfd f26, 96(r1) # save F26 | |
96 | stfd f27, 104(r1) # save F27 | |
97 | stfd f28, 112(r1) # save F28 | |
98 | stfd f29, 120(r1) # save F29 | |
99 | stfd f30, 128(r1) # save F30 | |
100 | stfd f31, 136(r1) # save F31 | |
101 | mffs f0 # load FPSCR | |
102 | stfd f0, 144(r1) # save FPSCR | |
103 | ||
104 | stw r13, 152(r1) # save R13 | |
105 | stw r14, 156(r1) # save R14 | |
106 | stw r15, 160(r1) # save R15 | |
107 | stw r16, 164(r1) # save R16 | |
108 | stw r17, 168(r1) # save R17 | |
109 | stw r18, 172(r1) # save R18 | |
110 | stw r19, 176(r1) # save R19 | |
111 | stw r20, 180(r1) # save R20 | |
112 | stw r21, 184(r1) # save R21 | |
113 | stw r22, 188(r1) # save R22 | |
114 | stw r23, 192(r1) # save R23 | |
115 | stw r24, 196(r1) # save R24 | |
116 | stw r25, 200(r1) # save R25 | |
117 | stw r26, 204(r1) # save R26 | |
118 | stw r27, 208(r1) # save R27 | |
119 | stw r28, 212(r1) # save R28 | |
120 | stw r29, 216(r1) # save R29 | |
121 | stw r30, 220(r1) # save R30 | |
122 | stw r31, 224(r1) # save R31 | |
123 | stw r3, 228(r1) # save hidden | |
124 | ||
125 | # save CR | |
126 | mfcr r0 | |
127 | stw r0, 232(r1) | |
128 | # save LR | |
129 | mflr r0 | |
130 | stw r0, 236(r1) | |
131 | # save LR as PC | |
132 | stw r0, 240(r1) | |
133 | ||
134 | # store RSP (pointing to context-data) in R7 | |
135 | mr r7, r1 | |
136 | ||
137 | # restore RSP (pointing to context-data) from R4 | |
138 | mr r1, r4 | |
139 | ||
140 | lfd f14, 0(r1) # restore F14 | |
141 | lfd f15, 8(r1) # restore F15 | |
142 | lfd f16, 16(r1) # restore F16 | |
143 | lfd f17, 24(r1) # restore F17 | |
144 | lfd f18, 32(r1) # restore F18 | |
145 | lfd f19, 40(r1) # restore F19 | |
146 | lfd f20, 48(r1) # restore F20 | |
147 | lfd f21, 56(r1) # restore F21 | |
148 | lfd f22, 64(r1) # restore F22 | |
149 | lfd f23, 72(r1) # restore F23 | |
150 | lfd f24, 80(r1) # restore F24 | |
151 | lfd f25, 88(r1) # restore F25 | |
152 | lfd f26, 96(r1) # restore F26 | |
153 | lfd f27, 104(r1) # restore F27 | |
154 | lfd f28, 112(r1) # restore F28 | |
155 | lfd f29, 120(r1) # restore F29 | |
156 | lfd f30, 128(r1) # restore F30 | |
157 | lfd f31, 136(r1) # restore F31 | |
158 | lfd f0, 144(r1) # load FPSCR | |
159 | mtfsf 0xff, f0 # restore FPSCR | |
160 | ||
161 | lwz r13, 152(r1) # restore R13 | |
162 | lwz r14, 156(r1) # restore R14 | |
163 | lwz r15, 160(r1) # restore R15 | |
164 | lwz r16, 164(r1) # restore R16 | |
165 | lwz r17, 168(r1) # restore R17 | |
166 | lwz r18, 172(r1) # restore R18 | |
167 | lwz r19, 176(r1) # restore R19 | |
168 | lwz r20, 180(r1) # restore R20 | |
169 | lwz r21, 184(r1) # restore R21 | |
170 | lwz r22, 188(r1) # restore R22 | |
171 | lwz r23, 192(r1) # restore R23 | |
172 | lwz r24, 196(r1) # restore R24 | |
173 | lwz r25, 200(r1) # restore R25 | |
174 | lwz r26, 204(r1) # restore R26 | |
175 | lwz r27, 208(r1) # restore R27 | |
176 | lwz r28, 212(r1) # restore R28 | |
177 | lwz r29, 216(r1) # restore R29 | |
178 | lwz r30, 220(r1) # restore R30 | |
179 | lwz r31, 224(r1) # restore R31 | |
180 | lwz r4, 228(r1) # restore hidden | |
181 | ||
182 | # restore CR | |
183 | lwz r0, 232(r1) | |
184 | mtcr r0 | |
185 | # restore LR | |
186 | lwz r0, 236(r1) | |
187 | mtlr r0 | |
188 | # ignore PC | |
189 | ||
190 | # adjust stack | |
191 | addi r1, r1, 244 | |
192 | ||
193 | # return transfer_t | |
194 | stw r7, 0(r4) | |
195 | stw r5, 4(r4) | |
196 | ||
197 | # restore CTR | |
198 | mtctr r6 | |
199 | ||
200 | # jump to ontop-function | |
201 | bctr |