Commit | Line | Data |
---|---|---|
bb56dd76 BJ |
1 | / fp2 -- floating point simulation |
2 | ||
3 | i.ldx: | |
4 | mov (r3)+,(r2)+ | |
5 | mov (r3)+,(r2)+ | |
6 | bit $m.ext,fpsr | |
7 | beq 1f | |
8 | mov (r3)+,(r2)+ | |
9 | mov (r3)+,(r2)+ | |
10 | rts pc | |
11 | 1: | |
12 | clr (r2)+ | |
13 | clr (r2)+ | |
14 | rts pc | |
15 | ||
16 | i.stx: | |
17 | mov (r2)+,(r3)+ | |
18 | mov (r2)+,(r3)+ | |
19 | bit $m.ext,fpsr | |
20 | beq 1f | |
21 | mov (r2)+,(r3)+ | |
22 | mov (r2)+,(r3)+ | |
23 | 1: | |
24 | rts pc | |
25 | ||
26 | i.clrx: | |
27 | clr (r3)+ | |
28 | clr (r3)+ | |
29 | bit $m.ext,fpsr | |
30 | beq 1f | |
31 | clr (r3)+ | |
32 | clr (r3)+ | |
33 | 1: | |
34 | rts pc | |
35 | ||
36 | i.negx: | |
37 | tst (r3) | |
38 | beq 1f | |
39 | add $100000,(r3) | |
40 | 1: | |
41 | rts pc | |
42 | ||
43 | i.absx: | |
44 | bic $!77777,(r3) | |
45 | rts pc | |
46 | ||
47 | i.tstx: | |
48 | rts pc | |
49 | ||
50 | i.cmpx: | |
51 | mov $areg,r5 | |
52 | tst (r2) | |
53 | bge 1f | |
54 | tst (r3) | |
55 | bge 1f | |
56 | cmp (r2),(r3) | |
57 | bgt 4f | |
58 | blt 3f | |
59 | 1: | |
60 | cmp (r2)+,(r3)+ | |
61 | bgt 3f | |
62 | blt 4f | |
63 | cmp (r2)+,(r3)+ | |
64 | bne 1f | |
65 | bit $m.ext,fpsr | |
66 | beq 2f | |
67 | cmp (r2)+,(r3)+ | |
68 | bne 1f | |
69 | cmp (r2)+,(r3)+ | |
70 | beq 2f | |
71 | 1: | |
72 | bhi 3f | |
73 | 4: | |
74 | mov $1,(r5) | |
75 | rts pc | |
76 | 3: | |
77 | mov $-1,(r5) | |
78 | rts pc | |
79 | 2: | |
80 | clr (r5) | |
81 | rts pc | |
82 | ||
83 | i.ldcyx: | |
84 | mov (r3)+,(r2)+ | |
85 | mov (r3)+,(r2)+ | |
86 | bit $m.ext,fpsr | |
87 | bne 1f | |
88 | mov (r3)+,(r2)+ | |
89 | mov (r3)+,(r2)+ | |
90 | rts pc | |
91 | 1: | |
92 | clr (r2)+ | |
93 | clr (r2)+ | |
94 | rts pc | |
95 | ||
96 | i.stcxy: | |
97 | mov (r2)+,(r3)+ | |
98 | mov (r2)+,(r3)+ | |
99 | bit $m.ext,fpsr | |
100 | bne 1f | |
101 | clr (r3)+ | |
102 | clr (r3)+ | |
103 | 1: | |
104 | rts pc | |
105 | ||
106 | i.ldcjx: | |
107 | mov $asign,r0 | |
108 | mov $1,(r0)+ | |
109 | mov (r3)+,(r0)+ | |
110 | bit $m.lngi,fpsr | |
111 | beq 1f | |
112 | mov (r3)+,(r0)+ | |
113 | clr (r0)+ | |
114 | clr (r0)+ | |
115 | mov $32.-8,(r0)+ | |
116 | jmp saret | |
117 | 1: | |
118 | clr (r0)+ | |
119 | clr (r0)+ | |
120 | clr (r0)+ | |
121 | mov $16.-8,(r0) | |
122 | jmp saret | |
123 | ||
124 | i.stcxj: | |
125 | mov r3,r5 | |
126 | mov $asign,r0 | |
127 | jsr pc,seta | |
128 | mov $areg,r0 | |
129 | mov (r0)+,r1 | |
130 | mov (r0)+,r2 | |
131 | mov (r0)+,r3 | |
132 | mov aexp,r0 | |
133 | 1: | |
134 | cmp r0,$48.-8 | |
135 | bge 1f | |
136 | clc | |
137 | ror r1 | |
138 | ror r2 | |
139 | ror r3 | |
140 | inc r0 | |
141 | br 1b | |
142 | 1: | |
143 | bgt xoflo | |
144 | tst r1 | |
145 | bne xoflo | |
146 | 1: | |
147 | bit $m.lngi,fpsr | |
148 | beq 1f | |
149 | tst asign | |
150 | bge 2f | |
151 | neg r3 | |
152 | adc r2 | |
153 | bcs 2f | |
154 | neg r2 | |
155 | 2: | |
156 | mov r2,(r5) | |
157 | mov r3,2(r5) | |
158 | rts pc | |
159 | 1: | |
160 | tst r2 | |
161 | bne xoflo | |
162 | tst asign | |
163 | bge 2f | |
164 | neg r3 | |
165 | 2: | |
166 | mov r3,(r5) | |
167 | rts pc | |
168 | ||
169 | xoflo: | |
170 | bis $1,fpsr / set fixed overflow (carry) | |
171 | jmp ret | |
172 | ||
173 | i.ldexp: | |
174 | mov $asign,r0 | |
175 | jsr pc,seta | |
176 | mov (r3),aexp | |
177 | jsr pc,reta | |
178 | jmp sret | |
179 | ||
180 | i.stexp: | |
181 | mov $asign,r0 | |
182 | jsr pc,seta | |
183 | mov aexp,(r3) | |
184 | mov r3,r5 | |
185 | jmp sret | |
186 | ||
187 | i.ldfps: | |
188 | mov (r3),fpsr | |
189 | jmp ret | |
190 | ||
191 | i.stfps: | |
192 | mov fpsr,(r3) | |
193 | jmp ret | |
194 |