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fpreg.c
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1 /*
2  * arch/alpha/lib/fpreg.c
3  *
4  * (C) Copyright 1998 Linus Torvalds
5  */
6 
7 #if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
8 #define STT(reg,val) asm volatile ("ftoit $f"#reg",%0" : "=r"(val));
9 #else
10 #define STT(reg,val) asm volatile ("stt $f"#reg",%0" : "=m"(val));
11 #endif
12 
13 unsigned long
14 alpha_read_fp_reg (unsigned long reg)
15 {
16  unsigned long val;
17 
18  switch (reg) {
19  case 0: STT( 0, val); break;
20  case 1: STT( 1, val); break;
21  case 2: STT( 2, val); break;
22  case 3: STT( 3, val); break;
23  case 4: STT( 4, val); break;
24  case 5: STT( 5, val); break;
25  case 6: STT( 6, val); break;
26  case 7: STT( 7, val); break;
27  case 8: STT( 8, val); break;
28  case 9: STT( 9, val); break;
29  case 10: STT(10, val); break;
30  case 11: STT(11, val); break;
31  case 12: STT(12, val); break;
32  case 13: STT(13, val); break;
33  case 14: STT(14, val); break;
34  case 15: STT(15, val); break;
35  case 16: STT(16, val); break;
36  case 17: STT(17, val); break;
37  case 18: STT(18, val); break;
38  case 19: STT(19, val); break;
39  case 20: STT(20, val); break;
40  case 21: STT(21, val); break;
41  case 22: STT(22, val); break;
42  case 23: STT(23, val); break;
43  case 24: STT(24, val); break;
44  case 25: STT(25, val); break;
45  case 26: STT(26, val); break;
46  case 27: STT(27, val); break;
47  case 28: STT(28, val); break;
48  case 29: STT(29, val); break;
49  case 30: STT(30, val); break;
50  case 31: STT(31, val); break;
51  default: return 0;
52  }
53  return val;
54 }
55 
56 #if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
57 #define LDT(reg,val) asm volatile ("itoft %0,$f"#reg : : "r"(val));
58 #else
59 #define LDT(reg,val) asm volatile ("ldt $f"#reg",%0" : : "m"(val));
60 #endif
61 
62 void
63 alpha_write_fp_reg (unsigned long reg, unsigned long val)
64 {
65  switch (reg) {
66  case 0: LDT( 0, val); break;
67  case 1: LDT( 1, val); break;
68  case 2: LDT( 2, val); break;
69  case 3: LDT( 3, val); break;
70  case 4: LDT( 4, val); break;
71  case 5: LDT( 5, val); break;
72  case 6: LDT( 6, val); break;
73  case 7: LDT( 7, val); break;
74  case 8: LDT( 8, val); break;
75  case 9: LDT( 9, val); break;
76  case 10: LDT(10, val); break;
77  case 11: LDT(11, val); break;
78  case 12: LDT(12, val); break;
79  case 13: LDT(13, val); break;
80  case 14: LDT(14, val); break;
81  case 15: LDT(15, val); break;
82  case 16: LDT(16, val); break;
83  case 17: LDT(17, val); break;
84  case 18: LDT(18, val); break;
85  case 19: LDT(19, val); break;
86  case 20: LDT(20, val); break;
87  case 21: LDT(21, val); break;
88  case 22: LDT(22, val); break;
89  case 23: LDT(23, val); break;
90  case 24: LDT(24, val); break;
91  case 25: LDT(25, val); break;
92  case 26: LDT(26, val); break;
93  case 27: LDT(27, val); break;
94  case 28: LDT(28, val); break;
95  case 29: LDT(29, val); break;
96  case 30: LDT(30, val); break;
97  case 31: LDT(31, val); break;
98  }
99 }
100 
101 #if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
102 #define STS(reg,val) asm volatile ("ftois $f"#reg",%0" : "=r"(val));
103 #else
104 #define STS(reg,val) asm volatile ("sts $f"#reg",%0" : "=m"(val));
105 #endif
106 
107 unsigned long
108 alpha_read_fp_reg_s (unsigned long reg)
109 {
110  unsigned long val;
111 
112  switch (reg) {
113  case 0: STS( 0, val); break;
114  case 1: STS( 1, val); break;
115  case 2: STS( 2, val); break;
116  case 3: STS( 3, val); break;
117  case 4: STS( 4, val); break;
118  case 5: STS( 5, val); break;
119  case 6: STS( 6, val); break;
120  case 7: STS( 7, val); break;
121  case 8: STS( 8, val); break;
122  case 9: STS( 9, val); break;
123  case 10: STS(10, val); break;
124  case 11: STS(11, val); break;
125  case 12: STS(12, val); break;
126  case 13: STS(13, val); break;
127  case 14: STS(14, val); break;
128  case 15: STS(15, val); break;
129  case 16: STS(16, val); break;
130  case 17: STS(17, val); break;
131  case 18: STS(18, val); break;
132  case 19: STS(19, val); break;
133  case 20: STS(20, val); break;
134  case 21: STS(21, val); break;
135  case 22: STS(22, val); break;
136  case 23: STS(23, val); break;
137  case 24: STS(24, val); break;
138  case 25: STS(25, val); break;
139  case 26: STS(26, val); break;
140  case 27: STS(27, val); break;
141  case 28: STS(28, val); break;
142  case 29: STS(29, val); break;
143  case 30: STS(30, val); break;
144  case 31: STS(31, val); break;
145  default: return 0;
146  }
147  return val;
148 }
149 
150 #if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
151 #define LDS(reg,val) asm volatile ("itofs %0,$f"#reg : : "r"(val));
152 #else
153 #define LDS(reg,val) asm volatile ("lds $f"#reg",%0" : : "m"(val));
154 #endif
155 
156 void
157 alpha_write_fp_reg_s (unsigned long reg, unsigned long val)
158 {
159  switch (reg) {
160  case 0: LDS( 0, val); break;
161  case 1: LDS( 1, val); break;
162  case 2: LDS( 2, val); break;
163  case 3: LDS( 3, val); break;
164  case 4: LDS( 4, val); break;
165  case 5: LDS( 5, val); break;
166  case 6: LDS( 6, val); break;
167  case 7: LDS( 7, val); break;
168  case 8: LDS( 8, val); break;
169  case 9: LDS( 9, val); break;
170  case 10: LDS(10, val); break;
171  case 11: LDS(11, val); break;
172  case 12: LDS(12, val); break;
173  case 13: LDS(13, val); break;
174  case 14: LDS(14, val); break;
175  case 15: LDS(15, val); break;
176  case 16: LDS(16, val); break;
177  case 17: LDS(17, val); break;
178  case 18: LDS(18, val); break;
179  case 19: LDS(19, val); break;
180  case 20: LDS(20, val); break;
181  case 21: LDS(21, val); break;
182  case 22: LDS(22, val); break;
183  case 23: LDS(23, val); break;
184  case 24: LDS(24, val); break;
185  case 25: LDS(25, val); break;
186  case 26: LDS(26, val); break;
187  case 27: LDS(27, val); break;
188  case 28: LDS(28, val); break;
189  case 29: LDS(29, val); break;
190  case 30: LDS(30, val); break;
191  case 31: LDS(31, val); break;
192  }
193 }
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