# FFREE
# Free Floating-Point Register
| Opcode | Mnemonic | Description |
|---|---|---|
| DD C0+i | FFREE | ST(i) Sets tag for ST(i) to empty. |
# Description
Sets the tag in the FPU tag register associated with register ST(i) to empty (11B). The contents of ST(i) and the FPU stack-top pointer (TOP) are not affected.
# Operation
Tag(i) = 3; //11B
1
2
2
# FPU flags affected
C0, C1, C2, C3 undefined.
# Floating-Point Exceptions
None.
# Protected Mode Exceptions
| #NM | EM or TS in CR0 is set. |
# Real-Address Mode Exceptions
| #NM | EM or TS in CR0 is set. |
# Virtual-8086 Mode Exceptions
| #NM | EM or TS in CR0 is set. |