Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1092

nop — No Operation
( ) nop
Format: qp imm
( ) nop.i
qp
( ) nop.b
qp
( ) nop.m
qp
( ) nop.f
qp
( ) nop.x
qp
No operation is done.
Description:
The immediate,
is ignored by hardware.
For the x_unit_form, the L slot of the bundle contains the upper 41 bits of
A nop.i instruction may be encoded in an MLI-template bundle, in which case the L slot
of the bundle is ignored.
This instruction has five forms, each of which can be executed only on a particular
execution unit type. The pseudo-op can be used if the unit type to execute on is
unimportant.
Operation:
if (PR[qp]) {
; // no operation
}
None
Interruptions:
Volume 3: Instruction Reference
21
imm
21
imm
21
imm
21
imm
21
imm
62
or , can be used by software as a marker in program code. It
imm imm
21 62
nop
pseudo-op
i_unit_form I18
b_unit_form B9
m_unit_form M48
f_unit_form F16
x_unit_form X5
.
imm
62
3:193