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1 | /* |
2 | NetWinder Floating Point Emulator |
3 | (c) Rebel.COM, 1998,1999 |
4 | (c) Philip Blundell, 2001 |
5 | |
6 | Direct questions, comments to Scott Bambrough <scottb@netwinder.org> |
7 | |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by |
10 | the Free Software Foundation; either version 2 of the License, or |
11 | (at your option) any later version. |
12 | |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | GNU General Public License for more details. |
17 | |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 | */ |
22 | |
23 | #include "fpa11.h" |
24 | #include "softfloat.h" |
25 | #include "fpopcode.h" |
26 | |
27 | float32 float32_exp(float32 Fm); |
28 | float32 float32_ln(float32 Fm); |
29 | float32 float32_sin(float32 rFm); |
30 | float32 float32_cos(float32 rFm); |
31 | float32 float32_arcsin(float32 rFm); |
32 | float32 float32_arctan(float32 rFm); |
33 | float32 float32_log(float32 rFm); |
34 | float32 float32_tan(float32 rFm); |
35 | float32 float32_arccos(float32 rFm); |
36 | float32 float32_pow(float32 rFn, float32 rFm); |
37 | float32 float32_pol(float32 rFn, float32 rFm); |
38 | |
39 | static float32 float32_rsf(struct roundingData *roundData, float32 rFn, float32 rFm) |
40 | { |
41 | return float32_sub(roundData, rFm, rFn); |
42 | } |
43 | |
44 | static float32 float32_rdv(struct roundingData *roundData, float32 rFn, float32 rFm) |
45 | { |
46 | return float32_div(roundData, rFm, rFn); |
47 | } |
48 | |
49 | static float32 (*const dyadic_single[16])(struct roundingData *, float32 rFn, float32 rFm) = { |
50 | [ADF_CODE >> 20] = float32_add, |
51 | [MUF_CODE >> 20] = float32_mul, |
52 | [SUF_CODE >> 20] = float32_sub, |
53 | [RSF_CODE >> 20] = float32_rsf, |
54 | [DVF_CODE >> 20] = float32_div, |
55 | [RDF_CODE >> 20] = float32_rdv, |
56 | [RMF_CODE >> 20] = float32_rem, |
57 | |
58 | [FML_CODE >> 20] = float32_mul, |
59 | [FDV_CODE >> 20] = float32_div, |
60 | [FRD_CODE >> 20] = float32_rdv, |
61 | }; |
62 | |
63 | static float32 float32_mvf(struct roundingData *roundData, float32 rFm) |
64 | { |
65 | return rFm; |
66 | } |
67 | |
68 | static float32 float32_mnf(struct roundingData *roundData, float32 rFm) |
69 | { |
70 | return rFm ^ 0x80000000; |
71 | } |
72 | |
73 | static float32 float32_abs(struct roundingData *roundData, float32 rFm) |
74 | { |
75 | return rFm & 0x7fffffff; |
76 | } |
77 | |
78 | static float32 (*const monadic_single[16])(struct roundingData*, float32 rFm) = { |
79 | [MVF_CODE >> 20] = float32_mvf, |
80 | [MNF_CODE >> 20] = float32_mnf, |
81 | [ABS_CODE >> 20] = float32_abs, |
82 | [RND_CODE >> 20] = float32_round_to_int, |
83 | [URD_CODE >> 20] = float32_round_to_int, |
84 | [SQT_CODE >> 20] = float32_sqrt, |
85 | [NRM_CODE >> 20] = float32_mvf, |
86 | }; |
87 | |
88 | unsigned int SingleCPDO(struct roundingData *roundData, const unsigned int opcode, FPREG * rFd) |
89 | { |
90 | FPA11 *fpa11 = GET_FPA11(); |
91 | float32 rFm; |
92 | unsigned int Fm, opc_mask_shift; |
93 | |
94 | Fm = getFm(opcode); |
95 | if (CONSTANT_FM(opcode)) { |
96 | rFm = getSingleConstant(Fm); |
97 | } else if (fpa11->fType[Fm] == typeSingle) { |
98 | rFm = fpa11->fpreg[Fm].fSingle; |
99 | } else { |
100 | return 0; |
101 | } |
102 | |
103 | opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20; |
104 | if (!MONADIC_INSTRUCTION(opcode)) { |
105 | unsigned int Fn = getFn(opcode); |
106 | float32 rFn; |
107 | |
108 | if (fpa11->fType[Fn] == typeSingle && |
109 | dyadic_single[opc_mask_shift]) { |
110 | rFn = fpa11->fpreg[Fn].fSingle; |
111 | rFd->fSingle = dyadic_single[opc_mask_shift](roundData, rFn, rFm); |
112 | } else { |
113 | return 0; |
114 | } |
115 | } else { |
116 | if (monadic_single[opc_mask_shift]) { |
117 | rFd->fSingle = monadic_single[opc_mask_shift](roundData, rFm); |
118 | } else { |
119 | return 0; |
120 | } |
121 | } |
122 | |
123 | return 1; |
124 | } |
125 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9