Commit | Line | Data |
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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 "fpa11.h" | |
23 | #include "softfloat.h" | |
24 | #include "fpopcode.h" | |
25 | ||
26 | floatx80 floatx80_exp(floatx80 Fm); | |
27 | floatx80 floatx80_ln(floatx80 Fm); | |
28 | floatx80 floatx80_sin(floatx80 rFm); | |
29 | floatx80 floatx80_cos(floatx80 rFm); | |
30 | floatx80 floatx80_arcsin(floatx80 rFm); | |
31 | floatx80 floatx80_arctan(floatx80 rFm); | |
32 | floatx80 floatx80_log(floatx80 rFm); | |
33 | floatx80 floatx80_tan(floatx80 rFm); | |
34 | floatx80 floatx80_arccos(floatx80 rFm); | |
35 | floatx80 floatx80_pow(floatx80 rFn, floatx80 rFm); | |
36 | floatx80 floatx80_pol(floatx80 rFn, floatx80 rFm); | |
37 | ||
f148af25 | 38 | static floatx80 floatx80_rsf(struct roundingData *roundData, floatx80 rFn, floatx80 rFm) |
1da177e4 | 39 | { |
f148af25 | 40 | return floatx80_sub(roundData, rFm, rFn); |
1da177e4 LT |
41 | } |
42 | ||
f148af25 | 43 | static floatx80 floatx80_rdv(struct roundingData *roundData, floatx80 rFn, floatx80 rFm) |
1da177e4 | 44 | { |
f148af25 | 45 | return floatx80_div(roundData, rFm, rFn); |
1da177e4 LT |
46 | } |
47 | ||
f148af25 | 48 | static floatx80 (*const dyadic_extended[16])(struct roundingData*, floatx80 rFn, floatx80 rFm) = { |
1da177e4 LT |
49 | [ADF_CODE >> 20] = floatx80_add, |
50 | [MUF_CODE >> 20] = floatx80_mul, | |
51 | [SUF_CODE >> 20] = floatx80_sub, | |
52 | [RSF_CODE >> 20] = floatx80_rsf, | |
53 | [DVF_CODE >> 20] = floatx80_div, | |
54 | [RDF_CODE >> 20] = floatx80_rdv, | |
55 | [RMF_CODE >> 20] = floatx80_rem, | |
56 | ||
57 | /* strictly, these opcodes should not be implemented */ | |
58 | [FML_CODE >> 20] = floatx80_mul, | |
59 | [FDV_CODE >> 20] = floatx80_div, | |
60 | [FRD_CODE >> 20] = floatx80_rdv, | |
61 | }; | |
62 | ||
f148af25 | 63 | static floatx80 floatx80_mvf(struct roundingData *roundData, floatx80 rFm) |
1da177e4 LT |
64 | { |
65 | return rFm; | |
66 | } | |
67 | ||
f148af25 | 68 | static floatx80 floatx80_mnf(struct roundingData *roundData, floatx80 rFm) |
1da177e4 LT |
69 | { |
70 | rFm.high ^= 0x8000; | |
71 | return rFm; | |
72 | } | |
73 | ||
f148af25 | 74 | static floatx80 floatx80_abs(struct roundingData *roundData, floatx80 rFm) |
1da177e4 LT |
75 | { |
76 | rFm.high &= 0x7fff; | |
77 | return rFm; | |
78 | } | |
79 | ||
f148af25 | 80 | static floatx80 (*const monadic_extended[16])(struct roundingData*, floatx80 rFm) = { |
1da177e4 LT |
81 | [MVF_CODE >> 20] = floatx80_mvf, |
82 | [MNF_CODE >> 20] = floatx80_mnf, | |
83 | [ABS_CODE >> 20] = floatx80_abs, | |
84 | [RND_CODE >> 20] = floatx80_round_to_int, | |
85 | [URD_CODE >> 20] = floatx80_round_to_int, | |
86 | [SQT_CODE >> 20] = floatx80_sqrt, | |
87 | [NRM_CODE >> 20] = floatx80_mvf, | |
88 | }; | |
89 | ||
f148af25 | 90 | unsigned int ExtendedCPDO(struct roundingData *roundData, const unsigned int opcode, FPREG * rFd) |
1da177e4 LT |
91 | { |
92 | FPA11 *fpa11 = GET_FPA11(); | |
93 | floatx80 rFm; | |
94 | unsigned int Fm, opc_mask_shift; | |
95 | ||
96 | Fm = getFm(opcode); | |
97 | if (CONSTANT_FM(opcode)) { | |
98 | rFm = getExtendedConstant(Fm); | |
99 | } else { | |
100 | switch (fpa11->fType[Fm]) { | |
101 | case typeSingle: | |
102 | rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle); | |
103 | break; | |
104 | ||
105 | case typeDouble: | |
106 | rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble); | |
107 | break; | |
108 | ||
109 | case typeExtended: | |
110 | rFm = fpa11->fpreg[Fm].fExtended; | |
111 | break; | |
112 | ||
113 | default: | |
114 | return 0; | |
115 | } | |
116 | } | |
117 | ||
118 | opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20; | |
119 | if (!MONADIC_INSTRUCTION(opcode)) { | |
120 | unsigned int Fn = getFn(opcode); | |
121 | floatx80 rFn; | |
122 | ||
123 | switch (fpa11->fType[Fn]) { | |
124 | case typeSingle: | |
125 | rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle); | |
126 | break; | |
127 | ||
128 | case typeDouble: | |
129 | rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble); | |
130 | break; | |
131 | ||
132 | case typeExtended: | |
133 | rFn = fpa11->fpreg[Fn].fExtended; | |
134 | break; | |
135 | ||
136 | default: | |
137 | return 0; | |
138 | } | |
139 | ||
140 | if (dyadic_extended[opc_mask_shift]) { | |
f148af25 | 141 | rFd->fExtended = dyadic_extended[opc_mask_shift](roundData, rFn, rFm); |
1da177e4 LT |
142 | } else { |
143 | return 0; | |
144 | } | |
145 | } else { | |
146 | if (monadic_extended[opc_mask_shift]) { | |
f148af25 | 147 | rFd->fExtended = monadic_extended[opc_mask_shift](roundData, rFm); |
1da177e4 LT |
148 | } else { |
149 | return 0; | |
150 | } | |
151 | } | |
152 | ||
153 | return 1; | |
154 | } |