Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1206

Table 4-13.
Opcode
Bits
40:37
8
Table 4-14.
Opcode
Bits
40:37
8
Volume 3: Instruction Formats
Multimedia ALU Size 1 4-bit+2-bit Opcode Extensions
x z z x
2a a b 4
Bits Bit Bit Bits
35:34 36 33 32:29
0
1
2
3
4
5
6
7
1 0 0
8
9
A
B
C
D
E
F
Multimedia ALU Size 2 4-bit+2-bit Opcode Extensions
x z z x
2a a b 4
Bits Bit Bit Bits
35:34 36 33 32:29
0
1
2
3
4
5
6
7
1 0 1
8
9
A
B
C
D
E
F
0 1
padd1 A9 padd1.sss
psub1 A9 psub1.sss
pcmp1.eq A9 pcmp1.gt
0 1
padd2 A9 padd2.sss A9
psub2 A9 psub2.sss A9
pshladd2
pshradd2
pcmp2.eq A9 pcmp2.gt A9
x
2b
Bits 28:27
2
A9 padd1.uuu A9 padd1.uus
A9 psub1.uuu A9 psub1.uus
pavg1 A9 pavg1.raz
pavgsub1 A9
A9
x
2b
Bits 28:27
2
padd2.uuu A9 padd2.uus
psub2.uuu A9 psub2.uus
pavg2 A9 pavg2.raz
pavgsub2 A9
A10
A10
3
A9
A9
A9
3
A9
A9
A9
3:307