Intel Itanium 9150M, Manual

Page: 197 / 420

3:188 Volume 3: Instruction Reference
mpy4
mpy4 — Unsigned Integer Multiply
Format: (
qp
) mpy4
r
1
=
r
2
,
r
3
I2
Description:
The lower 32 bits of each of the two source operands are treated as unsigned values
and are multiplied, and the result is placed in GR
r
1
. The upper 32 bits of each of the
source operands are ignored.
Operation: if (PR[qp]) {
if (!instruction_implemented(mpy4))
illegal_operation_fault();
check_target_register( r
1
);
GR[ r
1
] = zero_ext(GR[ r
2
], 32) * zero_ext(GR[ r
3
], 32);
GR[ r
1
].nat = GR[ r
2
].nat || GR[ r
3
].nat;
}
Interruptions:
Illegal Operation fault