3:14
Volume 3: Instruction Reference
add
add — Add
Format:
(
qp
) add
r
1
=
r
2
,
r
3
register_form
(
qp
) add
r
1
=
r
2
,
r
3
, 1
plus1_form, register_form
(
qp
) add
r
1
=
imm
,
r
3
pseudo-op
(
qp
) adds
r
1
=
imm
14
,
r
3
imm14_form
(
qp
) addl
r
1
=
imm
22
,
r
3
imm22_form
Description:
The two source operands (and an optional constant 1) are added and the result placed
in GR
r
1
. In the register form the first operand is GR
r
2
; in the imm_14 form the first
operand is taken from the sign-extended
imm
14
encoding field; in the imm22_form the
first operand is taken from the sign-extended
imm
22
encoding field. In the imm22_form,
GR
r
3
can specify only GRs 0, 1, 2 and 3.
The plus1_form is available only in the register_form (although the equivalent effect in
the immediate forms can be achieved by adjusting the immediate).
The immediate-form pseudo-op chooses the imm14_form or imm22_form based on the
size of the immediate operand and the value of
r
3
.
Operation:
if (PR[
qp
]) {
check_target_register(
r
1
);
if (register_form)
// register form
tmp_src = GR[
r
2
];
else if (imm14_form)
// 14-bit immediate form
tmp_src = sign_ext(
imm
14
, 14);
else
// 22-bit immediate form
tmp_src = sign_ext(
imm
22
, 22);
tmp_nat = (register_form ? GR[
r
2
].nat : 0);
if (plus1_form)
GR[
r
1
] = t GR[
r
3
] + 1;
else
GR[
r
1
] = t GR[
r
3
];
GR[
r
1
].nat = tmp_nat || GR[
r
3
].nat;
}
Interruptions:
Illegal Operation fault
Содержание Itanium 9150M
Страница 1: ......
Страница 209: ...3 200 Volume 3 Instruction Reference padd Interruptions Illegal Operation fault...
Страница 301: ...3 292 Volume 3 Pseudo Code Functions Intel Itanium Architecture Software Developer s Manual Rev 2 3...
Страница 405: ...3 396 Volume 3 Resource and Dependency Semantics...
Страница 406: ...3 397 Intel Itanium Architecture Software Developer s Manual Rev 2 3 Index...
Страница 407: ...3 398 Intel Itanium Architecture Software Developer s Manual Rev 2 3...
Страница 419: ...INDEX Index 12 Index for Volumes 1 2 3 and 4...
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