ADC (AL, 0) - Throughput and Uops

With unroll_count=500 and no inner loop

• Code:

     0:	14 00                	adc    al,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.0
  • Core cycles: 2.0
  • Reference cycles: 1.2
  • TOPDOWN_RETIRING.ALL: 1.0
  • UOPS_MS: 0.0

With loop_count=1000 and unroll_count=10

• Code:

     0:	14 00                	adc    al,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.2
  • Core cycles: 2.1
  • Reference cycles: 1.27
  • TOPDOWN_RETIRING.ALL: 1.2
  • UOPS_MS: 0.0

With loop_count=100 and unroll_count=100

• Code:

     0:	14 00                	adc    al,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.02
  • Core cycles: 2.01
  • Reference cycles: 1.22
  • TOPDOWN_RETIRING.ALL: 1.02
  • UOPS_MS: 0.0

With additional dependency-breaking instructions

With unroll_count=500 and no inner loop

• Code:

     0:	48 31 c0             	xor    rax,rax
     3:	14 00                	adc    al,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.0
  • Core cycles: 1.0
  • Reference cycles: 0.57
  • TOPDOWN_RETIRING.ALL: 2.0
  • UOPS_MS: 0.0

With loop_count=1000 and unroll_count=10

• Code:

     0:	48 31 c0             	xor    rax,rax
     3:	14 00                	adc    al,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.2
  • Core cycles: 1.0
  • Reference cycles: 0.61
  • TOPDOWN_RETIRING.ALL: 2.2
  • UOPS_MS: 0.0

With loop_count=100 and unroll_count=100

• Code:

     0:	48 31 c0             	xor    rax,rax
     3:	14 00                	adc    al,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.02
  • Core cycles: 1.0
  • Reference cycles: 0.61
  • TOPDOWN_RETIRING.ALL: 2.02
  • UOPS_MS: 0.0