Home » Recent acquisitions » Acorn ADFS disks » adfs_AcornUser_199607.adf » Regulars » StarInfo/Thurlby/EasyDivARM
StarInfo/Thurlby/EasyDivARM
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Recent acquisitions » Acorn ADFS disks » adfs_AcornUser_199607.adf » Regulars |
| Filename: | StarInfo/Thurlby/EasyDivARM |
| Read OK: | ✔ |
| File size: | 063F bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
10REM >EasyDivARM
20REM by DCA, based on a Basic program by Les Thurlby
30REM (c) AU July 1996
40:
50MODE 0
60PROCass
61PRINT"Timing one million divisions..."
62TIME=0
63CALL test
64PRINT"That took ";TIME/100;" seconds"''
70REPEAT
80 INPUT"Divide: "A%
90 INPUT"By: "B%
100 IF B%=0 THEN
110 PRINT"Division by zero!"
120 ELSE
130 CALL divide
150 PRINT"Answer=";!quotient;", remainder ";!remainder
151 ENDIF
160UNTIL FALSE
170:
180DEF PROCass
190DIM code% &400
200sp=13:link=14:pc=15
210FOR pass%=0 TO 2 STEP 2
220P%=code%
230[OPT pass%
240.test
250 STMFD (sp)!,{link}
260 MOV r0,#1
270.test_loop1
280 MOV r1,#1
290.test_loop2
300 STMFD (sp)!,{r0-r1}
301 BL divide
310 LDMFD (sp)!,{r0-r1}
320 ADD r1,r1,#1
330 CMP r1,#1000
340 BLE test_loop2
350 ADD r0,r0,#1
360 CMP r0,#1000
361 BLE test_loop1
390 LDMFD (sp)!,{pc}
450
451 ; on entry r0=dividend, r1=divisor
460 ; on exit, r0=quotient, r1=remainder (also stored)
470.divide
480 MOV r3,#1
490.div1
500 CMP r0,r1,ASL #1
510 MOVGE r1,r1,ASL #1
520 MOVGE r3,r3,ASL #1
530 BGE div1
540 MOV r2,#0
550.div2 CMP r0,r1
560 SUBGE r0,r0,r1
570 ADDGE r2,r2,r3
580 MOV r1,r1,ASR #1
590 MOVS r3,r3,ASR #1
600 BNE div2
610 MOV r1,r0
620 MOV r0,r2
630 STR r0,quotient
640 STR r1,remainder
650 MOV pc,link
660
670.quotient
680 DCD 0
690.remainder
700 DCD 0
710]
720NEXT pass%
730ENDPROC
� >EasyDivARM
5� by DCA, based on a Basic program by Les Thurlby
� (c) AU July 1996
(:
2� 0
<�ass
=&�"Timing one million divisions..."
>�=0
?
� test
@$�"That took ";�/100;" seconds"''
F�
P �"Divide: "A%
Z �"By: "B%
d
� B%=0 �
n �"Division by zero!"
x �
� � divide
�4 �"Answer=";!quotient;", remainder ";!remainder
� �
�� �
�:
�
� �ass
�� code% &400
�sp=13:link=14:pc=15
�� pass%=0 � 2 � 2
� P%=code%
�[OPT pass%
� .test
� STMFD (sp)!,{link}
MOV r0,#1
.test_loop1
MOV r1,#1
".test_loop2
,! STMFD (sp)!,{r0-r1}
- BL divide
6! LDMFD (sp)!,{r0-r1}
@ ADD r1,r1,#1
J CMP r1,#1000
T BLE test_loop2
^ ADD r0,r0,#1
h CMP r0,#1000
i BLE test_loop1
� LDMFD (sp)!,{pc}
�
�. ; on entry r0=dividend, r1=divisor
�> ; on exit, r0=quotient, r1=remainder (also stored)
� .divide
� MOV r3,#1
� .div1
� CMP r0,r1,ASL #1
� MOVGE r1,r1,ASL #1
MOVGE r3,r3,ASL #1
BGE div1
MOV r2,#0
&.div2 CMP r0,r1
0 SUBGE r0,r0,r1
: ADDGE r2,r2,r3
D MOV r1,r1,ASR #1
N MOVS r3,r3,ASR #1
X BNE div2
b MOV r1,r0
l MOV r0,r2
v STR r0,quotient
� STR r1,remainder
� MOV pc,link
�
�
.quotient
� DCD 0
�.remainder
� DCD 0
�]
� � pass%
��
� 00000000 0d 00 0a 11 f4 20 3e 45 61 73 79 44 69 76 41 52 |..... >EasyDivAR|
00000010 4d 0d 00 14 35 f4 20 62 79 20 44 43 41 2c 20 62 |M...5. by DCA, b|
00000020 61 73 65 64 20 6f 6e 20 61 20 42 61 73 69 63 20 |ased on a Basic |
00000030 70 72 6f 67 72 61 6d 20 62 79 20 4c 65 73 20 54 |program by Les T|
00000040 68 75 72 6c 62 79 0d 00 1e 16 f4 20 28 63 29 20 |hurlby..... (c) |
00000050 41 55 20 4a 75 6c 79 20 31 39 39 36 0d 00 28 05 |AU July 1996..(.|
00000060 3a 0d 00 32 07 eb 20 30 0d 00 3c 08 f2 61 73 73 |:..2.. 0..<..ass|
00000070 0d 00 3d 26 f1 22 54 69 6d 69 6e 67 20 6f 6e 65 |..=&."Timing one|
00000080 20 6d 69 6c 6c 69 6f 6e 20 64 69 76 69 73 69 6f | million divisio|
00000090 6e 73 2e 2e 2e 22 0d 00 3e 07 d1 3d 30 0d 00 3f |ns..."..>..=0..?|
000000a0 0a d6 20 74 65 73 74 0d 00 40 24 f1 22 54 68 61 |.. test..@$."Tha|
000000b0 74 20 74 6f 6f 6b 20 22 3b 91 2f 31 30 30 3b 22 |t took ";./100;"|
000000c0 20 73 65 63 6f 6e 64 73 22 27 27 0d 00 46 05 f5 | seconds"''..F..|
000000d0 0d 00 50 12 20 e8 22 44 69 76 69 64 65 3a 20 22 |..P. ."Divide: "|
000000e0 41 25 0d 00 5a 12 20 e8 22 42 79 3a 20 20 20 20 |A%..Z. ."By: |
000000f0 20 22 42 25 0d 00 64 0d 20 e7 20 42 25 3d 30 20 | "B%..d. . B%=0 |
00000100 8c 0d 00 6e 1a 20 20 f1 22 44 69 76 69 73 69 6f |...n. ."Divisio|
00000110 6e 20 62 79 20 7a 65 72 6f 21 22 0d 00 78 06 20 |n by zero!"..x. |
00000120 cc 0d 00 82 0e 20 20 d6 20 64 69 76 69 64 65 0d |..... . divide.|
00000130 00 96 34 20 20 f1 22 41 6e 73 77 65 72 3d 22 3b |..4 ."Answer=";|
00000140 21 71 75 6f 74 69 65 6e 74 3b 22 2c 20 72 65 6d |!quotient;", rem|
00000150 61 69 6e 64 65 72 20 22 3b 21 72 65 6d 61 69 6e |ainder ";!remain|
00000160 64 65 72 0d 00 97 06 20 cd 0d 00 a0 07 fd 20 a3 |der.... ...... .|
00000170 0d 00 aa 05 3a 0d 00 b4 0a dd 20 f2 61 73 73 0d |....:..... .ass.|
00000180 00 be 10 de 20 63 6f 64 65 25 20 26 34 30 30 0d |.... code% &400.|
00000190 00 c8 17 73 70 3d 31 33 3a 6c 69 6e 6b 3d 31 34 |...sp=13:link=14|
000001a0 3a 70 63 3d 31 35 0d 00 d2 15 e3 20 70 61 73 73 |:pc=15..... pass|
000001b0 25 3d 30 20 b8 20 32 20 88 20 32 0d 00 dc 0c 50 |%=0 . 2 . 2....P|
000001c0 25 3d 63 6f 64 65 25 0d 00 e6 0e 5b 4f 50 54 20 |%=code%....[OPT |
000001d0 70 61 73 73 25 0d 00 f0 09 2e 74 65 73 74 0d 00 |pass%.....test..|
000001e0 fa 20 20 20 20 20 20 20 20 20 53 54 4d 46 44 20 |. STMFD |
000001f0 20 20 28 73 70 29 21 2c 7b 6c 69 6e 6b 7d 0d 01 | (sp)!,{link}..|
00000200 04 19 20 20 20 20 20 20 20 20 4d 4f 56 20 20 20 |.. MOV |
00000210 20 20 72 30 2c 23 31 0d 01 0e 0f 2e 74 65 73 74 | r0,#1.....test|
00000220 5f 6c 6f 6f 70 31 0d 01 18 19 20 20 20 20 20 20 |_loop1.... |
00000230 20 20 4d 4f 56 20 20 20 20 20 72 31 2c 23 31 0d | MOV r1,#1.|
00000240 01 22 0f 2e 74 65 73 74 5f 6c 6f 6f 70 32 0d 01 |."..test_loop2..|
00000250 2c 21 20 20 20 20 20 20 20 20 53 54 4d 46 44 20 |,! STMFD |
00000260 20 20 28 73 70 29 21 2c 7b 72 30 2d 72 31 7d 0d | (sp)!,{r0-r1}.|
00000270 01 2d 1a 20 20 20 20 20 20 20 20 42 4c 20 20 20 |.-. BL |
00000280 20 20 20 64 69 76 69 64 65 0d 01 36 21 20 20 20 | divide..6! |
00000290 20 20 20 20 20 4c 44 4d 46 44 20 20 20 28 73 70 | LDMFD (sp|
000002a0 29 21 2c 7b 72 30 2d 72 31 7d 0d 01 40 1c 20 20 |)!,{r0-r1}..@. |
000002b0 20 20 20 20 20 20 41 44 44 20 20 20 20 20 72 31 | ADD r1|
000002c0 2c 72 31 2c 23 31 0d 01 4a 1c 20 20 20 20 20 20 |,r1,#1..J. |
000002d0 20 20 43 4d 50 20 20 20 20 20 72 31 2c 23 31 30 | CMP r1,#10|
000002e0 30 30 0d 01 54 1e 20 20 20 20 20 20 20 20 42 4c |00..T. BL|
000002f0 45 20 20 20 20 20 74 65 73 74 5f 6c 6f 6f 70 32 |E test_loop2|
00000300 0d 01 5e 1c 20 20 20 20 20 20 20 20 41 44 44 20 |..^. ADD |
00000310 20 20 20 20 72 30 2c 72 30 2c 23 31 0d 01 68 1c | r0,r0,#1..h.|
00000320 20 20 20 20 20 20 20 20 43 4d 50 20 20 20 20 20 | CMP |
00000330 72 30 2c 23 31 30 30 30 0d 01 69 1e 20 20 20 20 |r0,#1000..i. |
00000340 20 20 20 20 42 4c 45 20 20 20 20 20 74 65 73 74 | BLE test|
00000350 5f 6c 6f 6f 70 31 0d 01 86 1e 20 20 20 20 20 20 |_loop1.... |
00000360 20 20 4c 44 4d 46 44 20 20 20 28 73 70 29 21 2c | LDMFD (sp)!,|
00000370 7b 70 63 7d 0d 01 c2 04 0d 01 c3 2e 20 20 20 20 |{pc}........ |
00000380 20 20 20 20 3b 20 6f 6e 20 65 6e 74 72 79 20 72 | ; on entry r|
00000390 30 3d 64 69 76 69 64 65 6e 64 2c 20 72 31 3d 64 |0=dividend, r1=d|
000003a0 69 76 69 73 6f 72 0d 01 cc 3e 20 20 20 20 20 20 |ivisor...> |
000003b0 20 20 3b 20 6f 6e 20 65 78 69 74 2c 20 72 30 3d | ; on exit, r0=|
000003c0 71 75 6f 74 69 65 6e 74 2c 20 72 31 3d 72 65 6d |quotient, r1=rem|
000003d0 61 69 6e 64 65 72 20 28 61 6c 73 6f 20 73 74 6f |ainder (also sto|
000003e0 72 65 64 29 0d 01 d6 0b 2e 64 69 76 69 64 65 0d |red).....divide.|
000003f0 01 e0 19 20 20 20 20 20 20 20 20 4d 4f 56 20 20 |... MOV |
00000400 20 20 20 72 33 2c 23 31 0d 01 ea 09 2e 64 69 76 | r3,#1.....div|
00000410 31 0d 01 f4 20 20 20 20 20 20 20 20 20 43 4d 50 |1... CMP|
00000420 20 20 20 20 20 72 30 2c 72 31 2c 41 53 4c 20 23 | r0,r1,ASL #|
00000430 31 0d 01 fe 20 20 20 20 20 20 20 20 20 4d 4f 56 |1... MOV|
00000440 47 45 20 20 20 72 31 2c 72 31 2c 41 53 4c 20 23 |GE r1,r1,ASL #|
00000450 31 0d 02 08 20 20 20 20 20 20 20 20 20 4d 4f 56 |1... MOV|
00000460 47 45 20 20 20 72 33 2c 72 33 2c 41 53 4c 20 23 |GE r3,r3,ASL #|
00000470 31 0d 02 12 18 20 20 20 20 20 20 20 20 42 47 45 |1.... BGE|
00000480 20 20 20 20 20 64 69 76 31 0d 02 1c 19 20 20 20 | div1.... |
00000490 20 20 20 20 20 4d 4f 56 20 20 20 20 20 72 32 2c | MOV r2,|
000004a0 23 30 0d 02 26 19 2e 64 69 76 32 20 20 20 43 4d |#0..&..div2 CM|
000004b0 50 20 20 20 20 20 72 30 2c 72 31 0d 02 30 1c 20 |P r0,r1..0. |
000004c0 20 20 20 20 20 20 20 53 55 42 47 45 20 20 20 72 | SUBGE r|
000004d0 30 2c 72 30 2c 72 31 0d 02 3a 1c 20 20 20 20 20 |0,r0,r1..:. |
000004e0 20 20 20 41 44 44 47 45 20 20 20 72 32 2c 72 32 | ADDGE r2,r2|
000004f0 2c 72 33 0d 02 44 20 20 20 20 20 20 20 20 20 4d |,r3..D M|
00000500 4f 56 20 20 20 20 20 72 31 2c 72 31 2c 41 53 52 |OV r1,r1,ASR|
00000510 20 23 31 0d 02 4e 20 20 20 20 20 20 20 20 20 4d | #1..N M|
00000520 4f 56 53 20 20 20 20 72 33 2c 72 33 2c 41 53 52 |OVS r3,r3,ASR|
00000530 20 23 31 0d 02 58 18 20 20 20 20 20 20 20 20 42 | #1..X. B|
00000540 4e 45 20 20 20 20 20 64 69 76 32 0d 02 62 19 20 |NE div2..b. |
00000550 20 20 20 20 20 20 20 4d 4f 56 20 20 20 20 20 72 | MOV r|
00000560 31 2c 72 30 0d 02 6c 19 20 20 20 20 20 20 20 20 |1,r0..l. |
00000570 4d 4f 56 20 20 20 20 20 72 30 2c 72 32 0d 02 76 |MOV r0,r2..v|
00000580 1f 20 20 20 20 20 20 20 20 53 54 52 20 20 20 20 |. STR |
00000590 20 72 30 2c 71 75 6f 74 69 65 6e 74 0d 02 80 20 | r0,quotient... |
000005a0 20 20 20 20 20 20 20 20 53 54 52 20 20 20 20 20 | STR |
000005b0 72 31 2c 72 65 6d 61 69 6e 64 65 72 0d 02 8a 1b |r1,remainder....|
000005c0 20 20 20 20 20 20 20 20 4d 4f 56 20 20 20 20 20 | MOV |
000005d0 70 63 2c 6c 69 6e 6b 0d 02 94 0c 20 20 20 20 20 |pc,link.... |
000005e0 20 20 20 0d 02 9e 0d 2e 71 75 6f 74 69 65 6e 74 | .....quotient|
000005f0 0d 02 a8 15 20 20 20 20 20 20 20 20 44 43 44 20 |.... DCD |
00000600 20 20 20 20 30 0d 02 b2 0e 2e 72 65 6d 61 69 6e | 0.....remain|
00000610 64 65 72 0d 02 bc 15 20 20 20 20 20 20 20 20 44 |der.... D|
00000620 43 44 20 20 20 20 20 30 0d 02 c6 05 5d 0d 02 d0 |CD 0....]...|
00000630 0b ed 20 70 61 73 73 25 0d 02 da 05 e1 0d ff |.. pass%.......|
0000063f 
.