Intel Itanium 9150M, Manual

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Volume 3: Instruction Formats 3:349
4.4.10.9 Translation Access
M46
4.4.10.10 Purge Translation Cache Entry
M47
4.4.11 Nop/Hint (M-Unit)
M-unit nop and hint instructions are encoded within major opcode 0 using a 3-bit
opcode extension field in bits 35:33 (x
3
), a 2-bit opcode extension field in bits 32:31
(x
2
), a 4-bit opcode extension field in bits 30:27 (x
4
), and a 1-bit opcode extension
field in bit 26 (y), as shown in Table 4-46 .
M48
4.5 B-Unit Instruction Encodings
The branch-unit includes branch, predict, and miscellaneous instructions.
40 37 36 35 33 32 27 26 20 19 13 12 6 5 0
1 x
3
x
6
r
3
r
1
qp
4 1 3 6 7 7 7 6
Instruction Operands Opcode
Extension
x
3
x
6
thash
r
1
= r
3
1 0
1A
ttag 1B
tpa
p
1E
tak
p
1F
40 37 36 35 33 32 27 26 20 19 6 5 0
1 x
3
x
6
r
3
qp
4 1 3 6 7 14 6
Instruction Operands Opcode
Extension
x
3
x
6
ptc.e
p
r
3
1 0 34
Table 4-46. Misc M-Unit 1-bit Opcode Extensions
Opcode
Bits 40:37
x
3
Bits 35:33
x
4
Bits 30:27
x
2
Bits 32:31
y
Bit 26
0 0 1 0
0 nop.m
1 hint.m
40 37 36 35 33 32 31 30 27 26 25 6 5 0
0 i x
3
x
2
x
4
y imm
20a
qp
4 1 3 2 4 1 20 6
Instruction Operands Opcode
Extension
x
3
x
4
x
2
y
nop.m
imm
21
0 0 1 0
0
hint.m 1