Commit | Line | Data |
---|---|---|
74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | NetWinder Floating Point Emulator | |
4 | (c) Rebel.COM, 1998,1999 | |
5 | (c) Philip Blundell, 2001 | |
6 | ||
7 | Direct questions, comments to Scott Bambrough <scottb@netwinder.org> | |
8 | ||
1da177e4 LT |
9 | */ |
10 | ||
11 | #include "fpa11.h" | |
12 | #include "softfloat.h" | |
13 | #include "fpopcode.h" | |
14 | ||
15 | float32 float32_exp(float32 Fm); | |
16 | float32 float32_ln(float32 Fm); | |
17 | float32 float32_sin(float32 rFm); | |
18 | float32 float32_cos(float32 rFm); | |
19 | float32 float32_arcsin(float32 rFm); | |
20 | float32 float32_arctan(float32 rFm); | |
21 | float32 float32_log(float32 rFm); | |
22 | float32 float32_tan(float32 rFm); | |
23 | float32 float32_arccos(float32 rFm); | |
24 | float32 float32_pow(float32 rFn, float32 rFm); | |
25 | float32 float32_pol(float32 rFn, float32 rFm); | |
26 | ||
f148af25 | 27 | static float32 float32_rsf(struct roundingData *roundData, float32 rFn, float32 rFm) |
1da177e4 | 28 | { |
f148af25 | 29 | return float32_sub(roundData, rFm, rFn); |
1da177e4 LT |
30 | } |
31 | ||
f148af25 | 32 | static float32 float32_rdv(struct roundingData *roundData, float32 rFn, float32 rFm) |
1da177e4 | 33 | { |
f148af25 | 34 | return float32_div(roundData, rFm, rFn); |
1da177e4 LT |
35 | } |
36 | ||
f148af25 | 37 | static float32 (*const dyadic_single[16])(struct roundingData *, float32 rFn, float32 rFm) = { |
1da177e4 LT |
38 | [ADF_CODE >> 20] = float32_add, |
39 | [MUF_CODE >> 20] = float32_mul, | |
40 | [SUF_CODE >> 20] = float32_sub, | |
41 | [RSF_CODE >> 20] = float32_rsf, | |
42 | [DVF_CODE >> 20] = float32_div, | |
43 | [RDF_CODE >> 20] = float32_rdv, | |
44 | [RMF_CODE >> 20] = float32_rem, | |
45 | ||
46 | [FML_CODE >> 20] = float32_mul, | |
47 | [FDV_CODE >> 20] = float32_div, | |
48 | [FRD_CODE >> 20] = float32_rdv, | |
49 | }; | |
50 | ||
f148af25 | 51 | static float32 float32_mvf(struct roundingData *roundData, float32 rFm) |
1da177e4 LT |
52 | { |
53 | return rFm; | |
54 | } | |
55 | ||
f148af25 | 56 | static float32 float32_mnf(struct roundingData *roundData, float32 rFm) |
1da177e4 LT |
57 | { |
58 | return rFm ^ 0x80000000; | |
59 | } | |
60 | ||
f148af25 | 61 | static float32 float32_abs(struct roundingData *roundData, float32 rFm) |
1da177e4 LT |
62 | { |
63 | return rFm & 0x7fffffff; | |
64 | } | |
65 | ||
f148af25 | 66 | static float32 (*const monadic_single[16])(struct roundingData*, float32 rFm) = { |
1da177e4 LT |
67 | [MVF_CODE >> 20] = float32_mvf, |
68 | [MNF_CODE >> 20] = float32_mnf, | |
69 | [ABS_CODE >> 20] = float32_abs, | |
70 | [RND_CODE >> 20] = float32_round_to_int, | |
71 | [URD_CODE >> 20] = float32_round_to_int, | |
72 | [SQT_CODE >> 20] = float32_sqrt, | |
73 | [NRM_CODE >> 20] = float32_mvf, | |
74 | }; | |
75 | ||
f148af25 | 76 | unsigned int SingleCPDO(struct roundingData *roundData, const unsigned int opcode, FPREG * rFd) |
1da177e4 LT |
77 | { |
78 | FPA11 *fpa11 = GET_FPA11(); | |
79 | float32 rFm; | |
80 | unsigned int Fm, opc_mask_shift; | |
81 | ||
82 | Fm = getFm(opcode); | |
83 | if (CONSTANT_FM(opcode)) { | |
84 | rFm = getSingleConstant(Fm); | |
85 | } else if (fpa11->fType[Fm] == typeSingle) { | |
86 | rFm = fpa11->fpreg[Fm].fSingle; | |
87 | } else { | |
88 | return 0; | |
89 | } | |
90 | ||
91 | opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20; | |
92 | if (!MONADIC_INSTRUCTION(opcode)) { | |
93 | unsigned int Fn = getFn(opcode); | |
94 | float32 rFn; | |
95 | ||
96 | if (fpa11->fType[Fn] == typeSingle && | |
97 | dyadic_single[opc_mask_shift]) { | |
98 | rFn = fpa11->fpreg[Fn].fSingle; | |
f148af25 | 99 | rFd->fSingle = dyadic_single[opc_mask_shift](roundData, rFn, rFm); |
1da177e4 LT |
100 | } else { |
101 | return 0; | |
102 | } | |
103 | } else { | |
104 | if (monadic_single[opc_mask_shift]) { | |
f148af25 | 105 | rFd->fSingle = monadic_single[opc_mask_shift](roundData, rFm); |
1da177e4 LT |
106 | } else { |
107 | return 0; | |
108 | } | |
109 | } | |
110 | ||
111 | return 1; | |
112 | } |