MOVSB_REPE

Operands

• Operand 1 (w, suppressed): Memory
• Operand 2 (r, suppressed): Memory
• Operand 3 (r/w, suppressed): Register (RCX)
• Operand 4 (r, suppressed): Flags (DF: r)

Available performance data

• Alder Lake-P
• Alder Lake-E
• Rocket Lake
• Tiger Lake
• Ice Lake
• Cascade Lake
• Cannon Lake
• Skylake-X
• Coffee Lake
• Kaby Lake
• Skylake
• Broadwell
• Haswell
• Ivy Bridge
• Sandy Bridge
• Westmere
• Nehalem
• Wolfdale
• Conroe
• Tremont
• Goldmont Plus
• Goldmont
• Airmont
• Bonnell
• AMD Zen 4
• AMD Zen 3
• AMD Zen 2
• AMD Zen+

Alder Lake-P

• Measurements
• Throughput
  • Computed from the port usage: 2.40
  • Measured (loop): 9.00
  • Measured (unrolled): 8.96
• Number of μops
  • Executed: 21
  • Retire slots: 22
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 18
• Port usage: 2*p015+4*p0156B+2*p06+2*p1+3*p23A+3*p49+2*p5+3*p78

Alder Lake-E

• Measurements
• Throughput
  • Measured (loop): 24.62
  • Measured (unrolled): 25.90
• Number of μops
  • Executed: 49
  • Microcode Sequencer (MS): 48

Rocket Lake

• Measurements
• Throughput
  • Computed from the port usage: 3.00
  • Measured (loop): 23.75
  • Measured (unrolled): 23.00
• Number of μops
  • Executed: 24
  • Retire slots: 24
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 20
• Port usage: 3*p015+4*p0156+3*p06+6*p23+6*p49+2*p5+3*p78

Tiger Lake

• Measurements
• Throughput
  • Computed from the port usage: 3.00
  • Measured (loop): 23.75
  • Measured (unrolled): 23.00
• Number of μops
  • Executed: 24
  • Retire slots: 24
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 20
• Port usage: 3*p015+4*p0156+3*p06+6*p23+6*p49+2*p5+3*p78

Ice Lake

• Measurements
• Throughput
  • Computed from the port usage: 4.50
  • Measured (loop): 9.90
  • Measured (unrolled): 9.04
• Number of μops
  • Executed: 24
  • Retire slots: 24
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 20
• Port usage: 4*p015+3*p06+6*p23+9*p49+2*p5+3*p78

Cascade Lake

• Measurements
• Throughput
  • Computed from the port usage: 12.75
  • Measured (loop): 24.18
  • Measured (unrolled): 24.02
• Number of μops
  • Executed: 66
  • Retire slots: 68
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 64
• Port usage: 2*p01+15*p015+2*p05+22*p06+4*p1+2*p15+11*p23+6*p4+4*p5

Cannon Lake

• Measurements
• Throughput
  • Computed from the port usage: 14.75
  • Measured (loop): 27.16
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 74
  • Retire slots: 79
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 75
• Port usage: 4*p01+19*p015+4*p05+23*p06+3*p1+2*p15+11*p23+5*p4+4*p5

Skylake-X

• Measurements
• Throughput
  • Computed from the port usage: 12.75
  • Measured (loop): 24.18
  • Measured (unrolled): 24.00
• Number of μops
  • Executed: 66
  • Retire slots: 68
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 64
• Port usage: 1*p01+16*p015+2*p05+22*p06+4*p1+2*p15+11*p23+6*p4+4*p5

Coffee Lake

• Measurements
• Throughput
  • Computed from the port usage: 12.75
  • Measured (loop): 24.18
  • Measured (unrolled): 24.03
• Number of μops
  • Executed: 66
  • Retire slots: 68
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 64
• Port usage: 1*p01+16*p015+2*p05+22*p06+4*p1+2*p15+11*p23+6*p4+4*p5

Kaby Lake

• Measurements
• Throughput
  • Computed from the port usage: 12.75
  • Measured (loop): 24.18
  • Measured (unrolled): 24.03
• Number of μops
  • Executed: 66
  • Retire slots: 68
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 64
• Port usage: 1*p01+16*p015+2*p05+22*p06+4*p1+2*p15+11*p23+6*p4+4*p5

Skylake

• Measurements
• Throughput
  • Computed from the port usage: 12.75
  • Measured (loop): 24.18
  • Measured (unrolled): 24.02
• Number of μops
  • Executed: 66
  • Retire slots: 68
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 64
• Port usage: 1*p01+16*p015+2*p05+22*p06+4*p1+2*p15+11*p23+5*p4+4*p5

Broadwell

• Measurements
• Throughput
  • Computed from the port usage: 17.50
  • Measured (loop): 30.09
  • Measured (unrolled): 30.33
• Number of μops
  • Executed: 88
  • Retire slots: 82
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 78
• Port usage: 10*p01+9*p015+31*p06+2*p1+18*p15+17*p23+7*p4

Haswell

• Measurements
• Throughput
  • Computed from the port usage: 17.50
  • Measured (loop): 30.08
  • Measured (unrolled): 30.31
• Number of μops
  • Executed: 88
  • Retire slots: 82
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 78
• Port usage: 12*p01+7*p015+31*p06+2*p1+18*p15+17*p23+7*p4
• IACA 2.1
• Latency: 12
• Throughput
  • Computed from the port usage: 1.00
  • IACA: 7.35 (with the -no_interiteration flag: 1.00)
• Number of μops: 5
• Port usage: 2*p0156+1*p23+1*p237+1*p4

Ivy Bridge

• Measurements
• Throughput
  • Computed from the port usage: 20.67
  • Measured (loop): 33.00
  • Measured (unrolled): 33.00
• Number of μops
  • Executed: 87
  • Retire slots: 88
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 84
• Port usage: 20*p01+15*p05+3*p1+10*p15+19*p23+8*p4+14*p5
• IACA 2.1
• Latency: 12
• Throughput
  • Computed from the port usage: 1.00
  • IACA: 8.00 (with the -no_interiteration flag: 1.00)
• Number of μops: 5
• Port usage: 2*p015+2*p23+1*p4

Sandy Bridge

• Measurements
• Throughput
  • Computed from the port usage: 4.33
  • Measured (loop): 10.00
  • Measured (unrolled): 10.00
• Number of μops
  • Executed: 22
  • Retire slots: 22
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 18
• Port usage: 1*p01+9*p015+1*p05+6*p23+3*p4+2*p5
• IACA 2.1
• Latency: 12
• Throughput
  • Computed from the port usage: 1.00
  • IACA: 8.00 (with the -no_interiteration flag: 1.00)
• Number of μops: 5
• Port usage: 2*p015+2*p23+1*p4

Westmere

• Measurements
• Throughput
  • Computed from the port usage: 4.33
  • Measured (loop): 12.00
  • Measured (unrolled): 12.00
• Number of μops
  • Executed: 22
  • Retire slots: 22
  • Microcode Sequencer (MS): 56
• Port usage: 11*p015+2*p05+3*p2+3*p3+3*p4
• IACA 2.1
• Latency: 10
• Throughput
  • Computed from the port usage: 1.00
  • IACA: 6.00 (with the -no_interiteration flag: 1.00)
• Number of μops: 5
• Port usage: 2*p015+1*p2+1*p3+1*p4

Nehalem

• Measurements
• Throughput
  • Computed from the port usage: 4.33
  • Measured (loop): 12.00
  • Measured (unrolled): 12.00
• Number of μops
  • Executed: 22
  • Retire slots: 22
  • Microcode Sequencer (MS): 56
• Port usage: 11*p015+2*p05+3*p2+3*p3+3*p4
• IACA 2.1
• Latency: 10
• Throughput
  • Computed from the port usage: 1.00
  • IACA: 6.00 (with the -no_interiteration flag: 1.00)
• Number of μops: 5
• Port usage: 2*p015+1*p2+1*p3+1*p4

Wolfdale

• Measurements
• Throughput
  • Computed from the port usage: 5.67
  • Measured (loop): 13.00
  • Measured (unrolled): 13.00
• Number of μops
  • Executed: 26
• Port usage: 8*p015+5*p1+3*p2+3*p3+3*p4+4*p5

Conroe

• Measurements
• Throughput
  • Computed from the port usage: 5.67
  • Measured (loop): 12.00
  • Measured (unrolled): 12.00
• Number of μops
  • Executed: 26
• Port usage: 8*p015+2*p05+5*p1+3*p2+3*p3+3*p4+2*p5

Tremont

• Measurements
• Throughput
  • Measured (loop): 27.00
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 24
  • Microcode Sequencer (MS): 24

Goldmont Plus

• Measurements
• Throughput
  • Measured (loop): 27.00
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 24
  • Microcode Sequencer (MS): 24

Goldmont

• Measurements
• Throughput
  • Measured (loop): 27.00
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 24
  • Microcode Sequencer (MS): 24

Airmont

• Measurements
• Throughput
  • Measured (loop): 21.00
  • Measured (unrolled): 21.00
• Number of μops
  • Executed: 5
  • Microcode Sequencer (MS): 5

Bonnell

• Measurements
• Throughput
  • Measured (loop): 22.00
  • Measured (unrolled): 22.00
• Number of μops
  • Executed: 7
  • Microcode Sequencer (MS): 19

AMD Zen 4

• Measurements
• Throughput
  • Measured (loop): 14.00
  • Measured (unrolled): 14.00
• Number of μops
  • Executed: 48

AMD Zen 3

• Measurements
• Throughput
  • Measured (loop): 19.00
  • Measured (unrolled): 19.00
• Number of μops
  • Executed: 3

AMD Zen 2

• Measurements
• Throughput
  • Measured (loop): 19.00
  • Measured (unrolled): 19.00
• Number of μops
  • Executed: 3

AMD Zen+

• Measurements
• Throughput
  • Measured (loop): 18.10
  • Measured (unrolled): 18.00
• Number of μops
  • Executed: 3