| ??? 02/22/05 17:48 Read: times |
#88173 - Nevertheless Responding to: ???'s previous message |
even if Keil did have "seamless" inline assembler it would not be safe to assume that you could just set ACC and CY in 'C', fiddle about a bit with inline assembler, then recover ACC and CY into 'C' variables: ACC = var_1; CY = var_2; #pragma ASM RLC A #pragma ENDASM var_3 = ACC; var_4 = CY;It will probably work in some cases but, if the compiler has to do any address calculations or whatever, it could well trash your ACC and/or CY values. The only way to be certain would be to check the generated assembler - if you have to keep doing that, you might just a well write it in assembler! |
| Topic | Author | Date |
| Rotating Carry (CY) through ACC in C51 | 01/01/70 00:00 | |
| Why ? | 01/01/70 00:00 | |
| It is a keyboard interface sub routine | 01/01/70 00:00 | |
| A51 to C51 interfacing | 01/01/70 00:00 | |
| inline | 01/01/70 00:00 | |
| it does, but | 01/01/70 00:00 | |
| Nevertheless | 01/01/70 00:00 | |
| A Case in point | 01/01/70 00:00 | |
| what? | 01/01/70 00:00 | |
| Thank you. | 01/01/70 00:00 | |
| Try | 01/01/70 00:00 | |
| what? | 01/01/70 00:00 | |
| shift first | 01/01/70 00:00 | |
| Problem Solved | 01/01/70 00:00 | |
| Wrong approach | 01/01/70 00:00 | |
| using chainsaw to perform dental surgery | 01/01/70 00:00 | |
| or... | 01/01/70 00:00 | |
| ANSI C | 01/01/70 00:00 | |
| microcontroller C portability is a myth | 01/01/70 00:00 | |
Portability No .. Commonality Maybe | 01/01/70 00:00 |