Root/
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 |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | */ |
21 | |
22 | #include "fpa11.h" |
23 | #include "softfloat.h" |
24 | #include "fpopcode.h" |
25 | #include "fpsr.h" |
26 | #include "fpmodule.h" |
27 | #include "fpmodule.inl" |
28 | |
29 | #ifdef CONFIG_FPE_NWFPE_XP |
30 | const floatx80 floatx80Constant[] = { |
31 | { .high = 0x0000, .low = 0x0000000000000000ULL},/* extended 0.0 */ |
32 | { .high = 0x3fff, .low = 0x8000000000000000ULL},/* extended 1.0 */ |
33 | { .high = 0x4000, .low = 0x8000000000000000ULL},/* extended 2.0 */ |
34 | { .high = 0x4000, .low = 0xc000000000000000ULL},/* extended 3.0 */ |
35 | { .high = 0x4001, .low = 0x8000000000000000ULL},/* extended 4.0 */ |
36 | { .high = 0x4001, .low = 0xa000000000000000ULL},/* extended 5.0 */ |
37 | { .high = 0x3ffe, .low = 0x8000000000000000ULL},/* extended 0.5 */ |
38 | { .high = 0x4002, .low = 0xa000000000000000ULL},/* extended 10.0 */ |
39 | }; |
40 | #endif |
41 | |
42 | const float64 float64Constant[] = { |
43 | 0x0000000000000000ULL, /* double 0.0 */ |
44 | 0x3ff0000000000000ULL, /* double 1.0 */ |
45 | 0x4000000000000000ULL, /* double 2.0 */ |
46 | 0x4008000000000000ULL, /* double 3.0 */ |
47 | 0x4010000000000000ULL, /* double 4.0 */ |
48 | 0x4014000000000000ULL, /* double 5.0 */ |
49 | 0x3fe0000000000000ULL, /* double 0.5 */ |
50 | 0x4024000000000000ULL /* double 10.0 */ |
51 | }; |
52 | |
53 | const float32 float32Constant[] = { |
54 | 0x00000000, /* single 0.0 */ |
55 | 0x3f800000, /* single 1.0 */ |
56 | 0x40000000, /* single 2.0 */ |
57 | 0x40400000, /* single 3.0 */ |
58 | 0x40800000, /* single 4.0 */ |
59 | 0x40a00000, /* single 5.0 */ |
60 | 0x3f000000, /* single 0.5 */ |
61 | 0x41200000 /* single 10.0 */ |
62 | }; |
63 | |
64 | /* condition code lookup table |
65 | index into the table is test code: EQ, NE, ... LT, GT, AL, NV |
66 | bit position in short is condition code: NZCV */ |
67 | static const unsigned short aCC[16] = { |
68 | 0xF0F0, // EQ == Z set |
69 | 0x0F0F, // NE |
70 | 0xCCCC, // CS == C set |
71 | 0x3333, // CC |
72 | 0xFF00, // MI == N set |
73 | 0x00FF, // PL |
74 | 0xAAAA, // VS == V set |
75 | 0x5555, // VC |
76 | 0x0C0C, // HI == C set && Z clear |
77 | 0xF3F3, // LS == C clear || Z set |
78 | 0xAA55, // GE == (N==V) |
79 | 0x55AA, // LT == (N!=V) |
80 | 0x0A05, // GT == (!Z && (N==V)) |
81 | 0xF5FA, // LE == (Z || (N!=V)) |
82 | 0xFFFF, // AL always |
83 | 0 // NV |
84 | }; |
85 | |
86 | unsigned int checkCondition(const unsigned int opcode, const unsigned int ccodes) |
87 | { |
88 | return (aCC[opcode >> 28] >> (ccodes >> 28)) & 1; |
89 | } |
90 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9