Deciphering Bit-fields

[scapps]

Greetings,

I am processing data which has what they call a "bit-field" with a range of 0x0000 to 0x7F83. I am using Fortran to read it in as an integer (16-bit). I need to look at each of the bit flag dependencies:

bit 9 - Is it a 0 or 1
bit 0 - Is it a 0 or 1
bit 1 - Is it a 0 or 1
bit 7 - Is it a 0 or 1
bit 8 - Is it a 0 or 1
bit 10 - Is it a 0 or 1
bit 11 - Is it a 0 or 1

How do I do this in Fortran90? Do I have to convert it from integer to something? I am lost. Any help would be appreciated.

Thanks.

 

[xwb]

You have to use IAND, IOR, IEOR functions.

Depends whether you number your bits from left to right or right to left. Say you have a 32 bit word. Is decimal 4 equal to bit 2 or bit 29?

 

[scapps]

Thanks. I figured it out. I will use the BTEST function. Seems to work fine.

Thank you.