Commit | Line | Data |
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1da177e4 LT |
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 | ||
f148af25 | 39 | static float32 float32_rsf(struct roundingData *roundData, float32 rFn, float32 rFm) |
1da177e4 | 40 | { |
f148af25 | 41 | return float32_sub(roundData, rFm, rFn); |
1da177e4 LT |
42 | } |
43 | ||
f148af25 | 44 | static float32 float32_rdv(struct roundingData *roundData, float32 rFn, float32 rFm) |
1da177e4 | 45 | { |
f148af25 | 46 | return float32_div(roundData, rFm, rFn); |
1da177e4 LT |
47 | } |
48 | ||
f148af25 | 49 | static float32 (*const dyadic_single[16])(struct roundingData *, float32 rFn, float32 rFm) = { |
1da177e4 LT |
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 | ||
f148af25 | 63 | static float32 float32_mvf(struct roundingData *roundData, float32 rFm) |
1da177e4 LT |
64 | { |
65 | return rFm; | |
66 | } | |
67 | ||
f148af25 | 68 | static float32 float32_mnf(struct roundingData *roundData, float32 rFm) |
1da177e4 LT |
69 | { |
70 | return rFm ^ 0x80000000; | |
71 | } | |
72 | ||
f148af25 | 73 | static float32 float32_abs(struct roundingData *roundData, float32 rFm) |
1da177e4 LT |
74 | { |
75 | return rFm & 0x7fffffff; | |
76 | } | |
77 | ||
f148af25 | 78 | static float32 (*const monadic_single[16])(struct roundingData*, float32 rFm) = { |
1da177e4 LT |
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 | ||
f148af25 | 88 | unsigned int SingleCPDO(struct roundingData *roundData, const unsigned int opcode, FPREG * rFd) |
1da177e4 LT |
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; | |
f148af25 | 111 | rFd->fSingle = dyadic_single[opc_mask_shift](roundData, rFn, rFm); |
1da177e4 LT |
112 | } else { |
113 | return 0; | |
114 | } | |
115 | } else { | |
116 | if (monadic_single[opc_mask_shift]) { | |
f148af25 | 117 | rFd->fSingle = monadic_single[opc_mask_shift](roundData, rFm); |
1da177e4 LT |
118 | } else { |
119 | return 0; | |
120 | } | |
121 | } | |
122 | ||
123 | return 1; | |
124 | } |