Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 965

fclrf
fclrf — Floating-point Clear Flags
( ) fclrf.
Format: qp sf
The status field's 6-bit flags field is reset to zero.
Description:
The mnemonic values for sf are given in
Operation: if (PR[qp]) {
fp_set_sf_flags(sf, 0);
}
None
FP Exceptions:
None
Interruptions:
3:66
Table 2-23 on page 3:56.
Volume 3: Instruction Reference
F13