Commit | Line | Data |
---|---|---|
81e70d48 PH |
1 | / -+-+-+-+-+ \ e H P S H F T . R A \ e -+-+-+-+-+\r |
2 | /\r | |
3 | / F4 INTEGER FUNCTION SHIFT (CNT,VAR)\r | |
4 | /\r | |
5 | / PERFORMS A LOGICAL LEFT OR RIGHT SHIFT WITH THE SECOND PARAMETER VAR.\r | |
6 | / THE INTEGER CNT WITH -37<CNT<37 SPECIFIES THE NUMBER AND DIRECTION OF\r | |
7 | / THE SHIFTS TO PERFORM.\r | |
8 | / IF CNT IS LESS THAN 0 THEN SHIFT PERFORMS A LEFT SHIFT, ELSE A RIGHT ONE\r | |
9 | / THE PARAMETERS CNT AND VAR REMAIN UNCHANGED.\r | |
10 | /\r | |
11 | / HARDWARE: LAB8/E, KE8-E, HARD/SOFT FPP12\r | |
12 | /\r | |
13 | / VER 0.0 20-AUG-80 HA *\r | |
14 | /\r | |
15 | \r | |
16 | / SHIFT ROUTINE\r | |
17 | / I=SHIFT (CNT,VAR)\r | |
18 | / IF CNT > 0 THEN DO A LOGICAL RIGHT SHIFT ELSE\r | |
19 | / LOGICAL LEFT SHIFT\r | |
20 | / VAR IS THE VARIABLE TO BE SHIFTED\r | |
21 | /\r | |
22 | SECT #SHIFT\r | |
23 | ENTRY SHIFT\r | |
24 | BASE 0\r | |
25 | TWO, 0\r | |
26 | 2\r | |
27 | TMPX, ORG .+2\r | |
28 | /\r | |
29 | /\r | |
30 | SHIFT, STARTD\r | |
31 | FLDA 10*3 / GET RETURN ADR AND\r | |
32 | FSTA GOBAK / STORE INTO GOBAK\r | |
33 | FLDA 0\r | |
34 | FADD TWO\r | |
35 | FSTA TMPX\r | |
36 | FSTA 3\r | |
37 | FLDA% 3\r | |
38 | FSTA 3\r | |
39 | STARTF\r | |
40 | FLDA% 3 / FIRST PARAM. --> FAC\r | |
41 | SETX X0\r | |
42 | ATX X1 / CONVERT INTO INTEGER AND STORE INTO CNT\r | |
43 | STARTD\r | |
44 | FLDA TMPX\r | |
45 | FADD TWO\r | |
46 | FSTA 3\r | |
47 | FLDA% 3\r | |
48 | FSTA 3\r | |
49 | STARTF\r | |
50 | FLDA% 3\r | |
51 | FSTA VAR\r | |
52 | TRAP4 SHIFT8 / KE8-E DOES THE WORK\r | |
53 | FLDA VAR\r | |
54 | GOBAK, JA .-.\r | |
55 | /\r | |
56 | /\r | |
57 | SECT8 #SHIF8\r | |
58 | X0, ORG .+2 / DEFINE THE X REG. BASE\r | |
59 | X1= 1\r | |
60 | CNT= X0+X1\r | |
61 | REMAIN, ORG .+1 / NUMBER OF SHIFTS LESS THAN 12 (REMAINDER OF CNT/12 )\r | |
62 | REP, ORG .+1 / NUMBER OF 12 BIT SHIFTS\r | |
63 | VAR, ORG .+3\r | |
64 | TMP1, ORG .+1\r | |
65 | TMP2, ORG .+1\r | |
66 | C1, 014 / 12\r | |
67 | /\r | |
68 | / KE8-E INSTRUCTIONS\r | |
69 | SHL= 07413\r | |
70 | CIA= 07041\r | |
71 | SWAB= 07431\r | |
72 | SWBA= 07447\r | |
73 | DST= 07445\r | |
74 | LSR= 07417\r | |
75 | CAM= 07621\r | |
76 | SWP= 07521\r | |
77 | DVI= 07407\r | |
78 | MQL= 07421\r | |
79 | MQA= 07501\r | |
80 | ACL= 07701\r | |
81 | CDI= 06203\r | |
82 | /\r | |
83 | SHIFT8, .-.\r | |
84 | SWAB / KE8-E --> MODE B, CLEAR AC!\r | |
85 | TAD CNT\r | |
86 | SMA CLA / IF CNT > 0 THEN GO TO RIGHTSHIFT ELSE\r | |
87 | JMP RSHIFT\r | |
88 | TAD CNT\r | |
89 | CIA\r | |
90 | DCA CNT / CONVERT TO POSITIVE NUMBER\r | |
91 | JMS SHIFT0 / SET UP REPEAT COUNTERS\r | |
92 | JMP LOOP1 / THERE ARE SOME 12 BIT SHIFTS TO DO\r | |
93 | JMP LOOP2 / THERE ARE NO 12 BIT SHIFTS\r | |
94 | LOOP1, TAD C1\r | |
95 | DCA I1 / INSERT 12 BIT SHIFT INSTRUCTION\r | |
96 | JMS SHIFT2\r | |
97 | ISZ REP\r | |
98 | JMP LOOP1\r | |
99 | LOOP2, TAD REMAIN / SHIFT THE REMAINING BITS\r | |
100 | SNA / IF THERE ARE NO SHIFT'S LEFT THEN WE GO HOME\r | |
101 | JMP HOME\r | |
102 | DCA I1\r | |
103 | JMS SHIFT2\r | |
104 | CDI\r | |
105 | JMP% SHIFT8\r | |
106 | /\r | |
107 | /\r | |
108 | RSHIFT, JMS SHIFT0 / SET UP REPEAT COUNTERS\r | |
109 | JMP ROOP1\r | |
110 | JMP ROOP2\r | |
111 | ROOP1, TAD C1\r | |
112 | DCA I3\r | |
113 | JMS SHIFT4\r | |
114 | ISZ REP\r | |
115 | JMP ROOP1\r | |
116 | ROOP2, TAD REMAIN\r | |
117 | SNA / TEST IF THERE ARE REMAINING BITS TO SHIFT\r | |
118 | JMP HOME\r | |
119 | DCA I3\r | |
120 | JMS SHIFT4\r | |
121 | HOME,\r | |
122 | CDI\r | |
123 | JMP% SHIFT8 / HOME TO MAMA\r | |
124 | /\r | |
125 | /\r | |
126 | SHIFT0, .-. / SET UP REPEAT COUNTERS\r | |
127 | TAD CNT\r | |
128 | SWBA / KE8E --> A, AC --> MQ\r | |
129 | MQL\r | |
130 | DVI\r | |
131 | 014\r | |
132 | DCA REMAIN\r | |
133 | ACL\r | |
134 | DCA REP\r | |
135 | SWAB / RESET KE8-E\r | |
136 | TAD REP\r | |
137 | SNA\r | |
138 | ISZ SHIFT0 / SECOND POINT OF RETURN\r | |
139 | CIA\r | |
140 | DCA REP\r | |
141 | JMP% SHIFT0\r | |
142 | /\r | |
143 | /\r | |
144 | SHIFT1, .-. / LOGICAL LEFT SHIFT FOR I1 POSITIONS AC & MQ\r | |
145 | MQL\r | |
146 | SHL\r | |
147 | I1, .-.\r | |
148 | JMP% SHIFT1\r | |
149 | /\r | |
150 | /\r | |
151 | SHIFT2, .-. / SHIFT VAR BY I1 POSITIONS TO THE LEFT\r | |
152 | TAD VAR+2\r | |
153 | JMS SHIFT1\r | |
154 | DCA TMP1 / SAVE OVERFLOW\r | |
155 | MQA\r | |
156 | DCA VAR+2 / STORE THIRD WORD OF RESULT\r | |
157 | /\r | |
158 | TAD VAR+1\r | |
159 | JMS SHIFT1\r | |
160 | DCA TMP2 / SAVE OVERFLOW\r | |
161 | TAD TMP1\r | |
162 | MQA / INSERT OVERFLOW OF WORD # 3\r | |
163 | DCA VAR+1 / STORE SECOND WORD OF RESULT\r | |
164 | /\r | |
165 | \r TAD VAR / SHIFT FIRST WORD\r | |
166 | JMS SHIFT1\r | |
167 | CLA\r | |
168 | TAD TMP2\r | |
169 | MQA\r | |
170 | DCA VAR\r | |
171 | JMP% SHIFT2\r | |
172 | /\r | |
173 | /\r | |
174 | SHIFT3, .-. / LOGICAL SHIFT RIGHT BY I3 BITS\r | |
175 | SWP / CLEAR MQ\r | |
176 | CLA SWP\r | |
177 | LSR\r | |
178 | I3, .-.\r | |
179 | JMP% SHIFT3\r | |
180 | /\r | |
181 | /\r | |
182 | SHIFT4, .-. / LOGICAL SHIFT RIGHT VAR BY I3 BITS AC & MQ\r | |
183 | CAM\r | |
184 | TAD VAR\r | |
185 | JMS SHIFT3\r | |
186 | DCA VAR\r | |
187 | ACL\r | |
188 | DCA TMP1\r | |
189 | /\r | |
190 | TAD VAR+1\r | |
191 | JMS SHIFT3\r | |
192 | SWP\r | |
193 | DCA TMP2\r | |
194 | TAD TMP1\r | |
195 | MQA\r | |
196 | DCA VAR+1\r | |
197 | /\r | |
198 | TAD VAR+2\r | |
199 | JMS SHIFT3\r | |
200 | MQL\r | |
201 | TAD TMP2\r | |
202 | MQA\r | |
203 | DCA VAR+2\r | |
204 | JMP% SHIFT4\r | |
205 | END\r | |
206 | \1a\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 |