1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /*---------------------------------------------------------------------------+ |
3 | | fpu_arith.c | |
4 | | | |
5 | | Code to implement the FPU register/register arithmetic instructions | |
6 | | | |
7 | | Copyright (C) 1992,1993,1997 | |
8 | | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia | |
9 | | E-mail billm@suburbia.net | |
10 | | | |
11 | | | |
12 | +---------------------------------------------------------------------------*/ |
13 | |
14 | #include "fpu_system.h" |
15 | #include "fpu_emu.h" |
16 | #include "control_w.h" |
17 | #include "status_w.h" |
18 | |
19 | void fadd__(void) |
20 | { |
21 | /* fadd st,st(i) */ |
22 | int i = FPU_rm; |
23 | clear_C1(); |
24 | FPU_add(b: &st(i), tagb: FPU_gettagi(stnr: i), destrnr: 0, control_word); |
25 | } |
26 | |
27 | void fmul__(void) |
28 | { |
29 | /* fmul st,st(i) */ |
30 | int i = FPU_rm; |
31 | clear_C1(); |
32 | FPU_mul(b: &st(i), tagb: FPU_gettagi(stnr: i), deststnr: 0, control_word); |
33 | } |
34 | |
35 | void fsub__(void) |
36 | { |
37 | /* fsub st,st(i) */ |
38 | clear_C1(); |
39 | FPU_sub(flags: 0, FPU_rm, control_word); |
40 | } |
41 | |
42 | void fsubr_(void) |
43 | { |
44 | /* fsubr st,st(i) */ |
45 | clear_C1(); |
46 | FPU_sub(REV, FPU_rm, control_word); |
47 | } |
48 | |
49 | void fdiv__(void) |
50 | { |
51 | /* fdiv st,st(i) */ |
52 | clear_C1(); |
53 | FPU_div(flags: 0, FPU_rm, control_word); |
54 | } |
55 | |
56 | void fdivr_(void) |
57 | { |
58 | /* fdivr st,st(i) */ |
59 | clear_C1(); |
60 | FPU_div(REV, FPU_rm, control_word); |
61 | } |
62 | |
63 | void fadd_i(void) |
64 | { |
65 | /* fadd st(i),st */ |
66 | int i = FPU_rm; |
67 | clear_C1(); |
68 | FPU_add(b: &st(i), tagb: FPU_gettagi(stnr: i), destrnr: i, control_word); |
69 | } |
70 | |
71 | void fmul_i(void) |
72 | { |
73 | /* fmul st(i),st */ |
74 | clear_C1(); |
75 | FPU_mul(b: &st(0), tagb: FPU_gettag0(), FPU_rm, control_word); |
76 | } |
77 | |
78 | void fsubri(void) |
79 | { |
80 | /* fsubr st(i),st */ |
81 | clear_C1(); |
82 | FPU_sub(DEST_RM, FPU_rm, control_word); |
83 | } |
84 | |
85 | void fsub_i(void) |
86 | { |
87 | /* fsub st(i),st */ |
88 | clear_C1(); |
89 | FPU_sub(REV | DEST_RM, FPU_rm, control_word); |
90 | } |
91 | |
92 | void fdivri(void) |
93 | { |
94 | /* fdivr st(i),st */ |
95 | clear_C1(); |
96 | FPU_div(DEST_RM, FPU_rm, control_word); |
97 | } |
98 | |
99 | void fdiv_i(void) |
100 | { |
101 | /* fdiv st(i),st */ |
102 | clear_C1(); |
103 | FPU_div(REV | DEST_RM, FPU_rm, control_word); |
104 | } |
105 | |
106 | void faddp_(void) |
107 | { |
108 | /* faddp st(i),st */ |
109 | int i = FPU_rm; |
110 | clear_C1(); |
111 | if (FPU_add(b: &st(i), tagb: FPU_gettagi(stnr: i), destrnr: i, control_word) >= 0) |
112 | FPU_pop(); |
113 | } |
114 | |
115 | void fmulp_(void) |
116 | { |
117 | /* fmulp st(i),st */ |
118 | clear_C1(); |
119 | if (FPU_mul(b: &st(0), tagb: FPU_gettag0(), FPU_rm, control_word) >= 0) |
120 | FPU_pop(); |
121 | } |
122 | |
123 | void fsubrp(void) |
124 | { |
125 | /* fsubrp st(i),st */ |
126 | clear_C1(); |
127 | if (FPU_sub(DEST_RM, FPU_rm, control_word) >= 0) |
128 | FPU_pop(); |
129 | } |
130 | |
131 | void fsubp_(void) |
132 | { |
133 | /* fsubp st(i),st */ |
134 | clear_C1(); |
135 | if (FPU_sub(REV | DEST_RM, FPU_rm, control_word) >= 0) |
136 | FPU_pop(); |
137 | } |
138 | |
139 | void fdivrp(void) |
140 | { |
141 | /* fdivrp st(i),st */ |
142 | clear_C1(); |
143 | if (FPU_div(DEST_RM, FPU_rm, control_word) >= 0) |
144 | FPU_pop(); |
145 | } |
146 | |
147 | void fdivp_(void) |
148 | { |
149 | /* fdivp st(i),st */ |
150 | clear_C1(); |
151 | if (FPU_div(REV | DEST_RM, FPU_rm, control_word) >= 0) |
152 | FPU_pop(); |
153 | } |
154 | |