Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS VOLUME 3 REV 2.3, Manual

Page: 1244 / 1898

Volume 3: Instruction Formats 3:345
4.4.10 System/Memory Management
All system/memory management instructions are encoded within major opcodes 0 and
1 using a 3-bit opcode extension field (x
3
) in bits 35:33. Some instructions also have a
4-bit opcode extension field (x
4
) in bits 30:27, or a 6-bit opcode extension field (x
6
) in
bits 32:27. Most of the instructions having a 4-bit opcode extension field also have a
2-bit extension field (x
2
) in bits 32:31. Table 4-42 shows the 3-bit assignments for
opcode 0, Table 4-43 summarizes the 4-bit+2-bit assignments for opcode 0, Table 4-44
shows the 3-bit assignments for opcode 1, and Table 4-45 summarizes the 6-bit
assignments for opcode 1.
Table 4-42. Opcode 0 System/Memory Management 3-bit Opcode
Extensions
Opcode
Bits 40:37
x
3
Bits 35:33
0
0
System/Memory Management 4-bit+2-bit Ext
( Table 4-43 )
1
2
3
4
chk.a.nc – int M22
5 chk.a.clr – int M22
6 chk.a.nc – fp M23
7 chk.a.clr – fp M23
Table 4-43. Opcode 0 System/Memory Management 4-bit+2-bit Opcode
Extensions
Opcode
Bits
40:37
x
3
Bits
35:33
x
4
Bits
30:27
x
2
Bits 32:31
0 1 2 3
0 0
0 break.m M37 invala M24 fwb M24 srlz.d M24
1
1-bit Ext
( Table 4-46 )
srlz.i M24
2 invala.e – int M26 mf M24
3 invala.e – fp M27 mf.a M24 sync.i M24
4 sum M44
5 rum M44
6 ssm M44
7 rsm M44
8 mov.m to ar – imm
8
M30
9
A loadrs M25
B
C
flushrs M25
D
E
F