uops-again.info

LFENCE;BSR RAX,RBX;MOV RAX,0X7FFFFFFF on Ice Lake (more architectures)

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AssemblyLFENCE;BSR RAX,RBX;MOV RAX,0X7FFFFFFF
Architecture CodenameIce Lake
Port Eligibility Instr. 1None
Port Eligibility Instr. 21*p1 (2358 other cmds. with the same port eligibility for instr. 2)
Port Eligibility Instr. 31*p0156 (6662 other cmds. with the same port eligibility for instr. 3)
(650 other cmds. with the same port eligibility for both instr. 2 and instr. 3)
Total Instr. Length (bytes)12
Cutoff 1None (10976 other commands with the same cutoff)
Cutoff 2None
Instruction 1LFENCE
Swap 🔄 Instruction 2 BSR RAX,RBX (444 other commands with the same Instruction 2)
Instruction 3MOV RAX,0X7FFFFFFF (444 other commands with the same Instruction 3)
Number of instructions3
Graph Generationpython3 unroll_csv.py -a ICL -asm "LFENCE;BSR RAX,RBX;MOV RAX,0X7FFFFFFF" && python3 normalize_cycles.py
Length Instruction 1 (bytes)3
Length Instruction 2 (bytes)4
Length Instruction 3 (bytes)5
Regioningfalse
Region Characterization Type27 (651 other commands with the same type)
Element Order Changes Regioning Effecttrue
Element Order Change DescriptionDifferent pattern of Type32

LFENCE;BSR RAX,RBX;MOV RAX,0X7FFFFFFF on additional architectures:

Other commands where Cutoff 1 = None:

10976 instructions, click for details

Other commands where Instruction 2 = BSR RAX,RBX:

444 instructions, click for details

Other commands where Instruction 3 = MOV RAX,0X7FFFFFFF:

444 instructions, click for details

Other commands where Region Characterization = Type27:

651 instructions, click for details

Other commands where the port eligibility for Instruction 2 is 1*p1:

2358 instructions, click for details

Other commands where the port eligibility for Instruction 3 is 1*p0156:

6662 instructions, click for details

Other commands where the port eligibility for Instruction 2 is 1*p1 and for Instruction 3 is 1*p0156: