uops-again.info

LFENCE;SHL RAX,1;BSR RAX,RBX on Coffee Lake 𓈗 (more architectures)

AssemblyLFENCE;SHL RAX,1;BSR RAX,RBX
Architecture CodenameCoffee Lake
Port Eligibility Instr. 1None
Port Eligibility Instr. 21*p06
Port Eligibility Instr. 31*p1
Total Instr. Length (bytes)10
Cutoff 1None (348 other commands with the same cutoff)
Cutoff 2None
Graph (open in new window) (raw data)
Instruction 1LFENCE
Swap 🔄 Instruction 2 SHL RAX,1 (60 other commands with the same Instruction 2)
Instruction 3BSR RAX,RBX (60 other commands with the same Instruction 3)
Number of instructions3
Graph Generationpython3 unroll_csv.py -a CFL -asm "LFENCE;SHL RAX,1;BSR RAX,RBX" && python3 normalize_cycles.py
Length Instruction 1 (bytes)3
Length Instruction 2 (bytes)3
Length Instruction 3 (bytes)4
Regioningfalse
Region CharacterizationType10 𓈗 (27 other commands with the same type)
Element Order Changes Regioning Effectfalse
Element Order Change DescriptionSame Pattern

See this command on additional architectures:

Other commands where Cutoff 1 = None:

Other commands where Instruction 2 = SHL RAX,1:

Other commands where Instruction 3 = BSR RAX,RBX:

Other commands where Region Characterization = Type10: