Sorry, I didn't put it clear.

test_for_bit equ 0x27
value_to_test equ 0x26

Say value 5 is stored in the file register 0x27
I would like to test the <test_for_bit> bit of <value_to_test>.

BTFSS value_to_test,[value stored in test_for_bit] -> Test the bit5 in the
value stored at 0x26

But the value stored in 0x27 will keep changing with program  execution.
Say, after sometime( may be while in a loop), 0x27 holds the value 3, then
the same statement must test the  bit3 of the value stored at 0x26.

Something like: I would like to count the number of 1's in the value ( at
0x26) using btfss instruction.

- Somasundaram.

At 02:09 PM 10/16/99 +0200, you wrote:
>I don't understand your question. What is it you want to test in the
>register? Do you want to test the position of the bit and then do
>instructions based on its position in the register?
>Or do you want to do instuctions based on the value in the register?
>
>You ask if there are other instructions based on a bit. Depends what you
>want to do.
>Other ways of testing for bits set is the MOVLW K (constant) and SUBWF
>0x027,W routine
>Then you test Status for Z, C or DC (BTFSS STATUS,Z) as one example.
>There are many more.
>
>Better if you explain to us what you need to do. Maybe with some short
>code examples.
>
>Quentin
>
>Somasundaram wrote:
>>
>> Hi,
>>
>> I am a PIC newbie. I am working on 16f877. I use MPLAB 4.12 for Windows.
>>
>> I have a value stored in the FileRegister 0x27 < General Purpose Register
>> >. That value is always between 0 and 7 (both inclusive). This value will
>> be dynamically varying during program execution. I need to use this value
>> in the instruction  BTFSS. How do I use it as required? Are there any other
>> methods that can be used to skip instructions based on a bit, with the bit
>> position dynamically varying during program execution?
>>
>> Regards,
>> Somasundaram.
>
>