1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* VISsave.S: Code for saving FPU register state for
* VIS routines. One should not call this directly,
* but use macros provided in <asm/visasm.h>.
*
* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
*/
#include <asm/asi.h>
#include <asm/page.h>
#include <asm/ptrace.h>
#include <asm/visasm.h>
#include <asm/thread_info.h>
.text
.globl VISenter, VISenterhalf
/* On entry: %o5=current FPRS value, %g7 is callers address */
/* May clobber %o5, %g1, %g2, %g3, %g7, %icc, %xcc */
/* Nothing special need be done here to handle pre-emption, this
* FPU save/restore mechanism is already preemption safe.
*/
.align 32
VISenter:
ldub [%g6 + TI_FPDEPTH], %g1
brnz,a,pn %g1, 1f
cmp %g1, 1
stb %g0, [%g6 + TI_FPSAVED]
stx %fsr, [%g6 + TI_XFSR]
9: jmpl %g7 + %g0, %g0
nop
1: bne,pn %icc, 2f
srl %g1, 1, %g1
vis1: ldub [%g6 + TI_FPSAVED], %g3
stx %fsr, [%g6 + TI_XFSR]
or %g3, %o5, %g3
stb %g3, [%g6 + TI_FPSAVED]
rd %gsr, %g3
clr %g1
ba,pt %xcc, 3f
stx %g3, [%g6 + TI_GSR]
2: add %g6, %g1, %g3
cmp %o5, FPRS_DU
be,pn %icc, 6f
sll %g1, 3, %g1
stb %o5, [%g3 + TI_FPSAVED]
rd %gsr, %g2
add %g6, %g1, %g3
stx %g2, [%g3 + TI_GSR]
add %g6, %g1, %g2
stx %fsr, [%g2 + TI_XFSR]
sll %g1, 5, %g1
3: andcc %o5, FPRS_DL|FPRS_DU, %g0
be,pn %icc, 9b
add %g6, TI_FPREGS, %g2
andcc %o5, FPRS_DL, %g0
be,pn %icc, 4f
add %g6, TI_FPREGS+0x40, %g3
membar #Sync
stda %f0, [%g2 + %g1] ASI_BLK_P
stda %f16, [%g3 + %g1] ASI_BLK_P
membar #Sync
andcc %o5, FPRS_DU, %g0
be,pn %icc, 5f
4: add %g1, 128, %g1
membar #Sync
stda %f32, [%g2 + %g1] ASI_BLK_P
stda %f48, [%g3 + %g1] ASI_BLK_P
5: membar #Sync
ba,pt %xcc, 80f
nop
.align 32
80: jmpl %g7 + %g0, %g0
nop
6: ldub [%g3 + TI_FPSAVED], %o5
or %o5, FPRS_DU, %o5
add %g6, TI_FPREGS+0x80, %g2
stb %o5, [%g3 + TI_FPSAVED]
sll %g1, 5, %g1
add %g6, TI_FPREGS+0xc0, %g3
wr %g0, FPRS_FEF, %fprs
membar #Sync
stda %f32, [%g2 + %g1] ASI_BLK_P
stda %f48, [%g3 + %g1] ASI_BLK_P
membar #Sync
ba,pt %xcc, 80f
nop
.align 32
80: jmpl %g7 + %g0, %g0
nop
.align 32
VISenterhalf:
ldub [%g6 + TI_FPDEPTH], %g1
brnz,a,pn %g1, 1f
cmp %g1, 1
stb %g0, [%g6 + TI_FPSAVED]
stx %fsr, [%g6 + TI_XFSR]
clr %o5
jmpl %g7 + %g0, %g0
wr %g0, FPRS_FEF, %fprs
1: bne,pn %icc, 2f
srl %g1, 1, %g1
ba,pt %xcc, vis1
sub %g7, 8, %g7
2: addcc %g6, %g1, %g3
sll %g1, 3, %g1
andn %o5, FPRS_DU, %g2
stb %g2, [%g3 + TI_FPSAVED]
rd %gsr, %g2
add %g6, %g1, %g3
stx %g2, [%g3 + TI_GSR]
add %g6, %g1, %g2
stx %fsr, [%g2 + TI_XFSR]
sll %g1, 5, %g1
3: andcc %o5, FPRS_DL, %g0
be,pn %icc, 4f
add %g6, TI_FPREGS, %g2
add %g6, TI_FPREGS+0x40, %g3
membar #Sync
stda %f0, [%g2 + %g1] ASI_BLK_P
stda %f16, [%g3 + %g1] ASI_BLK_P
membar #Sync
ba,pt %xcc, 4f
nop
.align 32
4: and %o5, FPRS_DU, %o5
jmpl %g7 + %g0, %g0
wr %o5, FPRS_FEF, %fprs
|
