Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 <linux/config.h> | |
23 | #include "fpa11.h" | |
24 | #include "softfloat.h" | |
25 | #include "fpopcode.h" | |
26 | #include "fpsr.h" | |
27 | #include "fpmodule.h" | |
28 | #include "fpmodule.inl" | |
29 | ||
30 | #ifdef CONFIG_FPE_NWFPE_XP | |
31 | const floatx80 floatx80Constant[] = { | |
32 | {0x0000, 0x0000000000000000ULL}, /* extended 0.0 */ | |
33 | {0x3fff, 0x8000000000000000ULL}, /* extended 1.0 */ | |
34 | {0x4000, 0x8000000000000000ULL}, /* extended 2.0 */ | |
35 | {0x4000, 0xc000000000000000ULL}, /* extended 3.0 */ | |
36 | {0x4001, 0x8000000000000000ULL}, /* extended 4.0 */ | |
37 | {0x4001, 0xa000000000000000ULL}, /* extended 5.0 */ | |
38 | {0x3ffe, 0x8000000000000000ULL}, /* extended 0.5 */ | |
39 | {0x4002, 0xa000000000000000ULL} /* extended 10.0 */ | |
40 | }; | |
41 | #endif | |
42 | ||
43 | const float64 float64Constant[] = { | |
44 | 0x0000000000000000ULL, /* double 0.0 */ | |
45 | 0x3ff0000000000000ULL, /* double 1.0 */ | |
46 | 0x4000000000000000ULL, /* double 2.0 */ | |
47 | 0x4008000000000000ULL, /* double 3.0 */ | |
48 | 0x4010000000000000ULL, /* double 4.0 */ | |
49 | 0x4014000000000000ULL, /* double 5.0 */ | |
50 | 0x3fe0000000000000ULL, /* double 0.5 */ | |
51 | 0x4024000000000000ULL /* double 10.0 */ | |
52 | }; | |
53 | ||
54 | const float32 float32Constant[] = { | |
55 | 0x00000000, /* single 0.0 */ | |
56 | 0x3f800000, /* single 1.0 */ | |
57 | 0x40000000, /* single 2.0 */ | |
58 | 0x40400000, /* single 3.0 */ | |
59 | 0x40800000, /* single 4.0 */ | |
60 | 0x40a00000, /* single 5.0 */ | |
61 | 0x3f000000, /* single 0.5 */ | |
62 | 0x41200000 /* single 10.0 */ | |
63 | }; | |
64 | ||
65 | /* condition code lookup table | |
66 | index into the table is test code: EQ, NE, ... LT, GT, AL, NV | |
67 | bit position in short is condition code: NZCV */ | |
68 | static const unsigned short aCC[16] = { | |
69 | 0xF0F0, // EQ == Z set | |
70 | 0x0F0F, // NE | |
71 | 0xCCCC, // CS == C set | |
72 | 0x3333, // CC | |
73 | 0xFF00, // MI == N set | |
74 | 0x00FF, // PL | |
75 | 0xAAAA, // VS == V set | |
76 | 0x5555, // VC | |
77 | 0x0C0C, // HI == C set && Z clear | |
78 | 0xF3F3, // LS == C clear || Z set | |
79 | 0xAA55, // GE == (N==V) | |
80 | 0x55AA, // LT == (N!=V) | |
81 | 0x0A05, // GT == (!Z && (N==V)) | |
82 | 0xF5FA, // LE == (Z || (N!=V)) | |
83 | 0xFFFF, // AL always | |
84 | 0 // NV | |
85 | }; | |
86 | ||
87 | unsigned int checkCondition(const unsigned int opcode, const unsigned int ccodes) | |
88 | { | |
89 | return (aCC[opcode >> 28] >> (ccodes >> 28)) & 1; | |
90 | } |