Volume 3: Instruction Formats
3:361
4.6.4
Approximation
4.6.4.1
Floating-point Reciprocal Approximation
There are two Reciprocal Approximation instructions. The first, in major op 0, encodes
the full register variant. The second, in major op 1, encodes the parallel variant.
4.6.4.2
Floating-point Reciprocal Square Root Approximation
There are two Reciprocal Square Root Approximation instructions. The first, in major op
0, encodes the full register variant. The second, in major op 1, encodes the parallel
variant.
40
37 36 35 34 33 32
27 26
20 19
13 12
6 5
0
q sf x
p
2
f
3
f
2
f
1
qp
4
1
2
1
6
7
7
7
6
Instruction
Operands
Opcode
Extension
x
q
sf
frcpa.
sf
f
1
,
p
2
=
f
2
,
f
3
1
0
fprcpa.
sf
40
37 36 35 34 33 32
27 26
20 19
13 12
6 5
0
q sf x
p
2
f
3
f
1
qp
4
1
2
1
6
7
7
7
6
Instruction
Operands
Opcode
Extension
x
q
sf
frsqrta.
sf
f
1
,
p
2
=
f
3
1
1
fprsqrta.
sf
Summary of Contents for Itanium 9150M
Page 1: ......
Page 209: ...3 200 Volume 3 Instruction Reference padd Interruptions Illegal Operation fault...
Page 405: ...3 396 Volume 3 Resource and Dependency Semantics...
Page 406: ...3 397 Intel Itanium Architecture Software Developer s Manual Rev 2 3 Index...
Page 407: ...3 398 Intel Itanium Architecture Software Developer s Manual Rev 2 3...
Page 419: ...INDEX Index 12 Index for Volumes 1 2 3 and 4...
Page 420: ......