Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 3 REV 2.3 Manual page 64

fabs — Floating-point Absolute Value
( ) fabs
Format: qp f
The absolute value of the value in FR
Description:
If FR is a NaTVal, FR
f
3
Operation:
See "fmerge — Floating-point Merge" on page 3:80.
Volume 3: Instruction Reference
=
f
1 3
is set to NaTVal instead of the computed result.
f
1
pseudo-op of: (
qp
is computed and placed in FR
f
3
fabs
) fmerge.s = f0,
f f
1 3
.
f
1
3:55