Bit shift problem

[MBB]

I'm using:
GCASM List File (GCBASIC 0.99.01 2022-01-27 (Windows 64 bit) : Build 1073)
with an 18F4550.

I wrote this simple code:

dim coef_0 as word

coef_0 = FnLSL(17, 4)

print coef_0

When I run the code it says coef_0 = 17.

I think it should be 272.

What am I doing wrong?

[MBB]

Correction

When I run the code it says coef_0 = 16 not 17

[Anobium]

Time to update the compiler... going for the oldest compiler in use award. :-) SMILING

Compiled with GCBASIC (2025.11.12 (Windows 64 bit) : Build 1527) using PIC-AS ( not GCASM).

dim coef_0 as word
coef_0 = FnLSL([WORD]17, 4)
print coef_0

Gives 272.

Note: You have to case the input variable. The compiler does not really know what the constant 17 is to be treated as. So, the cast tells the compiler to treat as a word.

[MBB]

Thanks!

That worked

[Anobium]

Did the explaination make sense?

The ASM shows the process. In the next release you can walk the program in a real Debugger to see what is happening.

[MBB]

yes, it made sense.