| ??? 10/20/05 09:46 Modified: 10/20/05 09:51 Read: times |
#102671 - Value testing Responding to: ???'s previous message |
Andy Neil said:
The clue is right there in the name of the instruction: CJNE = Compare and Jump if Not Equal Yes, it's pretty clear, but I agree that this command appears a bit confusing, and easily produces bugs, especially with beginners. I often use these two macros: ; Macros: JPLESS MACRO R,DAT,LAB ; Jump to LABEL if REG less than DAT CJNE R,DAT,$+3 ; (No jump, just take the next instruction) JC LAB ENDM JPGTEQ MACRO R,DAT,LAB ; Jump to LABEL if REG greater-equal to DAT CJNE R,DAT,$+3 JNC LAB ENDM But besides that, if the value is to be tested on Equal or Not-Equal, and if it can be destroyed, then this seems a bit easier: XRL A,Value ; or #Value ! JZ Equal or JNZ NotEqual Regards, Slobodan |
| Topic | Author | Date |
| CJNE clarrification | 01/01/70 00:00 | |
| Please find my answer below each quest | 01/01/70 00:00 | |
| cjne | 01/01/70 00:00 | |
| continued.. | 01/01/70 00:00 | |
| external memory | 01/01/70 00:00 | |
| Absolutely! | 01/01/70 00:00 | |
| cheat.... | 01/01/70 00:00 | |
| Hint | 01/01/70 00:00 | |
| you young whippersnappers | 01/01/70 00:00 | |
| Young Whippersnappers tools | 01/01/70 00:00 | |
| size & information | 01/01/70 00:00 | |
| CJNE macros | 01/01/70 00:00 | |
| More CJNE | 01/01/70 00:00 | |
PRE tags | 01/01/70 00:00 | |
| Whatever made you think that?? | 01/01/70 00:00 | |
| used to other language | 01/01/70 00:00 | |
| CJD | 01/01/70 00:00 | |
| welllll... | 01/01/70 00:00 | |
| most admirable, but | 01/01/70 00:00 | |
| Don't guess! | 01/01/70 00:00 | |
| which many that could not be bothered to | 01/01/70 00:00 | |
| Value testing | 01/01/70 00:00 | |
| Confusing for bigineer | 01/01/70 00:00 | |
| Just apply it | 01/01/70 00:00 | |
| what more then "the bibl" do you need | 01/01/70 00:00 |