1/*
2 * Copyright (c) 2003-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
| 1/*
2 * Copyright (c) 2003-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
27 */
28
29#include "arch/mips/isa_traits.hh"
30#include "arch/mips/utility.hh"
31#include "config/full_system.hh"
32#include "cpu/static_inst.hh"
33#include "sim/serialize.hh"
34#include "base/bitfield.hh"
35
36using namespace MipsISA;
37using namespace std;
38
39uint64_t
40MipsISA::fpConvert(ConvertType cvt_type, double fp_val)
41{
42
43 switch (cvt_type)
44 {
45 case SINGLE_TO_DOUBLE:
46 {
47 double sdouble_val = fp_val;
48 void *sdouble_ptr = &sdouble_val;
49 uint64_t sdp_bits = *(uint64_t *) sdouble_ptr;
50 return sdp_bits;
51 }
52
53 case SINGLE_TO_WORD:
54 {
55 int32_t sword_val = (int32_t) fp_val;
56 void *sword_ptr = &sword_val;
57 uint64_t sword_bits= *(uint32_t *) sword_ptr;
58 return sword_bits;
59 }
60
61 case WORD_TO_SINGLE:
62 {
63 float wfloat_val = fp_val;
64 void *wfloat_ptr = &wfloat_val;
65 uint64_t wfloat_bits = *(uint32_t *) wfloat_ptr;
66 return wfloat_bits;
67 }
68
69 case WORD_TO_DOUBLE:
70 {
71 double wdouble_val = fp_val;
72 void *wdouble_ptr = &wdouble_val;
73 uint64_t wdp_bits = *(uint64_t *) wdouble_ptr;
74 return wdp_bits;
75 }
76
77 default:
78 panic("Invalid Floating Point Conversion Type (%d). See \"types.hh\" for List of Conversions\n",cvt_type);
79 return 0;
80 }
81}
82
83double
84MipsISA::roundFP(double val, int digits)
85{
86 double digit_offset = pow(10.0,digits);
87 val = val * digit_offset;
88 val = val + 0.5;
89 val = floor(val);
90 val = val / digit_offset;
91 return val;
92}
93
94double
95MipsISA::truncFP(double val)
96{
97 int trunc_val = (int) val;
98 return (double) trunc_val;
99}
100
101bool
102MipsISA::getCondCode(uint32_t fcsr, int cc_idx)
103{
104 int shift = (cc_idx == 0) ? 23 : cc_idx + 24;
105 bool cc_val = (fcsr >> shift) & 0x00000001;
106 return cc_val;
107}
108
109uint32_t
110MipsISA::genCCVector(uint32_t fcsr, int cc_num, uint32_t cc_val)
111{
112 int cc_idx = (cc_num == 0) ? 23 : cc_num + 24;
113
114 fcsr = bits(fcsr, 31, cc_idx + 1) << cc_idx + 1 |
115 cc_val << cc_idx |
116 bits(fcsr, cc_idx - 1, 0);
117
118 return fcsr;
119}
120
121uint32_t
122MipsISA::genInvalidVector(uint32_t fcsr_bits)
123{
124 //Set FCSR invalid in "flag" field
125 int invalid_offset = Invalid + Flag_Field;
126 fcsr_bits = fcsr_bits | (1 << invalid_offset);
127
128 //Set FCSR invalid in "cause" flag
129 int cause_offset = Invalid + Cause_Field;
130 fcsr_bits = fcsr_bits | (1 << cause_offset);
131
132 return fcsr_bits;
133}
134
135bool
136MipsISA::isNan(void *val_ptr, int size)
137{
138 switch (size)
139 {
140 case 32:
141 {
142 uint32_t val_bits = *(uint32_t *) val_ptr;
143 return (bits(val_bits, 30, 23) == 0xFF);
144 }
145
146 case 64:
147 {
148 uint64_t val_bits = *(uint64_t *) val_ptr;
149 return (bits(val_bits, 62, 52) == 0x7FF);
150 }
151
152 default:
153 panic("Type unsupported. Size mismatch\n");
154 }
155}
156
157
158bool
159MipsISA::isQnan(void *val_ptr, int size)
160{
161 switch (size)
162 {
163 case 32:
164 {
165 uint32_t val_bits = *(uint32_t *) val_ptr;
166 return (bits(val_bits, 30, 22) == 0x1FE);
167 }
168
169 case 64:
170 {
171 uint64_t val_bits = *(uint64_t *) val_ptr;
172 return (bits(val_bits, 62, 51) == 0xFFE);
173 }
174
175 default:
176 panic("Type unsupported. Size mismatch\n");
177 }
178}
179
180bool
181MipsISA::isSnan(void *val_ptr, int size)
182{
183 switch (size)
184 {
185 case 32:
186 {
187 uint32_t val_bits = *(uint32_t *) val_ptr;
188 return (bits(val_bits, 30, 22) == 0x1FF);
189 }
190
191 case 64:
192 {
193 uint64_t val_bits = *(uint64_t *) val_ptr;
194 return (bits(val_bits, 62, 51) == 0xFFF);
195 }
196
197 default:
198 panic("Type unsupported. Size mismatch\n");
199 }
200}
| 29 */
30
31#include "arch/mips/isa_traits.hh"
32#include "arch/mips/utility.hh"
33#include "config/full_system.hh"
34#include "cpu/static_inst.hh"
35#include "sim/serialize.hh"
36#include "base/bitfield.hh"
37
38using namespace MipsISA;
39using namespace std;
40
41uint64_t
42MipsISA::fpConvert(ConvertType cvt_type, double fp_val)
43{
44
45 switch (cvt_type)
46 {
47 case SINGLE_TO_DOUBLE:
48 {
49 double sdouble_val = fp_val;
50 void *sdouble_ptr = &sdouble_val;
51 uint64_t sdp_bits = *(uint64_t *) sdouble_ptr;
52 return sdp_bits;
53 }
54
55 case SINGLE_TO_WORD:
56 {
57 int32_t sword_val = (int32_t) fp_val;
58 void *sword_ptr = &sword_val;
59 uint64_t sword_bits= *(uint32_t *) sword_ptr;
60 return sword_bits;
61 }
62
63 case WORD_TO_SINGLE:
64 {
65 float wfloat_val = fp_val;
66 void *wfloat_ptr = &wfloat_val;
67 uint64_t wfloat_bits = *(uint32_t *) wfloat_ptr;
68 return wfloat_bits;
69 }
70
71 case WORD_TO_DOUBLE:
72 {
73 double wdouble_val = fp_val;
74 void *wdouble_ptr = &wdouble_val;
75 uint64_t wdp_bits = *(uint64_t *) wdouble_ptr;
76 return wdp_bits;
77 }
78
79 default:
80 panic("Invalid Floating Point Conversion Type (%d). See \"types.hh\" for List of Conversions\n",cvt_type);
81 return 0;
82 }
83}
84
85double
86MipsISA::roundFP(double val, int digits)
87{
88 double digit_offset = pow(10.0,digits);
89 val = val * digit_offset;
90 val = val + 0.5;
91 val = floor(val);
92 val = val / digit_offset;
93 return val;
94}
95
96double
97MipsISA::truncFP(double val)
98{
99 int trunc_val = (int) val;
100 return (double) trunc_val;
101}
102
103bool
104MipsISA::getCondCode(uint32_t fcsr, int cc_idx)
105{
106 int shift = (cc_idx == 0) ? 23 : cc_idx + 24;
107 bool cc_val = (fcsr >> shift) & 0x00000001;
108 return cc_val;
109}
110
111uint32_t
112MipsISA::genCCVector(uint32_t fcsr, int cc_num, uint32_t cc_val)
113{
114 int cc_idx = (cc_num == 0) ? 23 : cc_num + 24;
115
116 fcsr = bits(fcsr, 31, cc_idx + 1) << cc_idx + 1 |
117 cc_val << cc_idx |
118 bits(fcsr, cc_idx - 1, 0);
119
120 return fcsr;
121}
122
123uint32_t
124MipsISA::genInvalidVector(uint32_t fcsr_bits)
125{
126 //Set FCSR invalid in "flag" field
127 int invalid_offset = Invalid + Flag_Field;
128 fcsr_bits = fcsr_bits | (1 << invalid_offset);
129
130 //Set FCSR invalid in "cause" flag
131 int cause_offset = Invalid + Cause_Field;
132 fcsr_bits = fcsr_bits | (1 << cause_offset);
133
134 return fcsr_bits;
135}
136
137bool
138MipsISA::isNan(void *val_ptr, int size)
139{
140 switch (size)
141 {
142 case 32:
143 {
144 uint32_t val_bits = *(uint32_t *) val_ptr;
145 return (bits(val_bits, 30, 23) == 0xFF);
146 }
147
148 case 64:
149 {
150 uint64_t val_bits = *(uint64_t *) val_ptr;
151 return (bits(val_bits, 62, 52) == 0x7FF);
152 }
153
154 default:
155 panic("Type unsupported. Size mismatch\n");
156 }
157}
158
159
160bool
161MipsISA::isQnan(void *val_ptr, int size)
162{
163 switch (size)
164 {
165 case 32:
166 {
167 uint32_t val_bits = *(uint32_t *) val_ptr;
168 return (bits(val_bits, 30, 22) == 0x1FE);
169 }
170
171 case 64:
172 {
173 uint64_t val_bits = *(uint64_t *) val_ptr;
174 return (bits(val_bits, 62, 51) == 0xFFE);
175 }
176
177 default:
178 panic("Type unsupported. Size mismatch\n");
179 }
180}
181
182bool
183MipsISA::isSnan(void *val_ptr, int size)
184{
185 switch (size)
186 {
187 case 32:
188 {
189 uint32_t val_bits = *(uint32_t *) val_ptr;
190 return (bits(val_bits, 30, 22) == 0x1FF);
191 }
192
193 case 64:
194 {
195 uint64_t val_bits = *(uint64_t *) val_ptr;
196 return (bits(val_bits, 62, 51) == 0xFFF);
197 }
198
199 default:
200 panic("Type unsupported. Size mismatch\n");
201 }
202}
|