4 multiply instruction timings, Multiply instruction timings, 31 multiply instruction timings – Intel NETWORK PROCESSOR IXP2800 User Manual
Page 116
116
Hardware Reference Manual
Intel
®
IXP2800 Network Processor
Intel XScale
®
Core
3.9.4.4
Multiply Instruction Timings
Table 31. Multiply Instruction Timings (Sheet 1 of 2)
Mnemonic
Rs Value
(Early Termination)
S-Bit
Value
Minimum
Issue Latency
Minimum Result
Latency
1
Minimum Resource
Latency (Throughput)
MLA
Rs[31:15] = 0x00000
or
Rs[31:15] = 0x1FFFF
0
1
2
1
1
2
2
2
Rs[31:27] = 0x00
or
Rs[31:27] = 0x1F
0
1
3
2
1
3
3
3
all others
0
1
4
3
1
4
4
4
MUL
Rs[31:15] = 0x00000
or
Rs[31:15] = 0x1FFFF
0
1
2
1
1
2
2
2
Rs[31:27] = 0x00
or
Rs[31:27] = 0x1F
0
1
3
2
1
3
3
3
all others
0
1
4
3
1
4
4
4
SMLAL
Rs[31:15] = 0x00000
or
Rs[31:15] = 0x1FFFF
0
2
RdLo = 2; RdHi = 3
2
1
3
3
3
Rs[31:27] = 0x00
or
Rs[31:27] = 0x1F
0
2
RdLo = 3; RdHi = 4
3
1
4
4
4
all others
0
2
RdLo = 4; RdHi = 5
4
1
5
5
5
SMLALxy
N/A
N/A
2
RdLo = 2; RdHi = 3
2
SMLAWy
N/A
N/A
1
3
2
SMLAxy
N/A
N/A
1
2
1
SMULL
Rs[31:15] = 0x00000
or
Rs[31:15] = 0x1FFFF
0
1
RdLo = 2; RdHi = 3
2
1
3
3
3
Rs[31:27] = 0x00
or
Rs[31:27] = 0x1F
0
1
RdLo = 3; RdHi = 4
3
1
4
4
4
all others
0
1
RdLo = 4; RdHi = 5
4
1
5
5
5
SMULWy
N/A
N/A
1
3
2
SMULxy
N/A
N/A
1
2
1
UMLAL
Rs[31:15] = 0x00000
0
2
RdLo = 2; RdHi = 3
2
1
3
3
3
Rs[31:27] = 0x00
0
2
RdLo = 3; RdHi = 4
3
1
4
4
4
all others
0
2
RdLo = 4; RdHi = 5
4
1
5
5
5