Why Some Assembly Instruction Are not Documented

Question

There are some Assembly instruction in Delphi Source Codes which I cannot found anywhere in Assembly Cheat Sheets including:

1. fld
2. fabs
3. fcompp
4. fstsw

I read these assembly instructions in "Power" function; But I cannot found them in this cheat sheet or similar cheat sheets.

Does these instructions are not belong to 8086, 8088 CPU instructions? or Simply these instructions are not included in these Cheat Sheets?

Is there a good Web Page which list all Assembly instructions?

Answer 1

These are all floating point instructions, which (primarily for historical reasons) are often documented separately from integer instructions. For a more authoritative reference, consider looking at the Intel manual.