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00406dff FB |
1 | /* |
2 | NetWinder Floating Point Emulator | |
3 | (c) Rebel.COM, 1998,1999 | |
4 | ||
5 | Direct questions, comments to Scott Bambrough <scottb@netwinder.org> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
70539e18 | 18 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
00406dff FB |
19 | */ |
20 | ||
d39594e9 | 21 | #include "qemu/osdep.h" |
00406dff | 22 | #include "fpa11.h" |
6b4c305c | 23 | #include "fpu/softfloat.h" |
00406dff FB |
24 | #include "fpopcode.h" |
25 | #include "fpsr.h" | |
26 | //#include "fpmodule.h" | |
27 | //#include "fpmodule.inl" | |
28 | ||
29 | const floatx80 floatx80Constant[] = { | |
20495218 FB |
30 | { 0x0000000000000000ULL, 0x0000}, /* extended 0.0 */ |
31 | { 0x8000000000000000ULL, 0x3fff}, /* extended 1.0 */ | |
32 | { 0x8000000000000000ULL, 0x4000}, /* extended 2.0 */ | |
33 | { 0xc000000000000000ULL, 0x4000}, /* extended 3.0 */ | |
34 | { 0x8000000000000000ULL, 0x4001}, /* extended 4.0 */ | |
35 | { 0xa000000000000000ULL, 0x4001}, /* extended 5.0 */ | |
36 | { 0x8000000000000000ULL, 0x3ffe}, /* extended 0.5 */ | |
37 | { 0xa000000000000000ULL, 0x4002} /* extended 10.0 */ | |
3b46e624 | 38 | }; |
00406dff FB |
39 | |
40 | const float64 float64Constant[] = { | |
005e1a0a PM |
41 | const_float64(0x0000000000000000ULL), /* double 0.0 */ |
42 | const_float64(0x3ff0000000000000ULL), /* double 1.0 */ | |
43 | const_float64(0x4000000000000000ULL), /* double 2.0 */ | |
44 | const_float64(0x4008000000000000ULL), /* double 3.0 */ | |
45 | const_float64(0x4010000000000000ULL), /* double 4.0 */ | |
46 | const_float64(0x4014000000000000ULL), /* double 5.0 */ | |
47 | const_float64(0x3fe0000000000000ULL), /* double 0.5 */ | |
48 | const_float64(0x4024000000000000ULL) /* double 10.0 */ | |
3b46e624 | 49 | }; |
00406dff FB |
50 | |
51 | const float32 float32Constant[] = { | |
005e1a0a PM |
52 | const_float32(0x00000000), /* single 0.0 */ |
53 | const_float32(0x3f800000), /* single 1.0 */ | |
54 | const_float32(0x40000000), /* single 2.0 */ | |
55 | const_float32(0x40400000), /* single 3.0 */ | |
56 | const_float32(0x40800000), /* single 4.0 */ | |
57 | const_float32(0x40a00000), /* single 5.0 */ | |
58 | const_float32(0x3f000000), /* single 0.5 */ | |
59 | const_float32(0x41200000) /* single 10.0 */ | |
3b46e624 | 60 | }; |
00406dff | 61 | |
00406dff FB |
62 | unsigned int getRegisterCount(const unsigned int opcode) |
63 | { | |
64 | unsigned int nRc; | |
3b46e624 | 65 | |
00406dff FB |
66 | switch (opcode & MASK_REGISTER_COUNT) |
67 | { | |
68 | case 0x00000000: nRc = 4; break; | |
69 | case 0x00008000: nRc = 1; break; | |
70 | case 0x00400000: nRc = 2; break; | |
71 | case 0x00408000: nRc = 3; break; | |
72 | default: nRc = 0; | |
73 | } | |
3b46e624 | 74 | |
00406dff FB |
75 | return(nRc); |
76 | } | |
77 | ||
00406dff FB |
78 | unsigned int getDestinationSize(const unsigned int opcode) |
79 | { | |
80 | unsigned int nRc; | |
3b46e624 | 81 | |
00406dff FB |
82 | switch (opcode & MASK_DESTINATION_SIZE) |
83 | { | |
84 | case 0x00000000: nRc = typeSingle; break; | |
85 | case 0x00000080: nRc = typeDouble; break; | |
86 | case 0x00080000: nRc = typeExtended; break; | |
87 | default: nRc = typeNone; | |
88 | } | |
3b46e624 | 89 | |
00406dff FB |
90 | return(nRc); |
91 | } |