Cross-Core and Robust Covert Channel Based on Macro-Op Fusion

Table 1

Pairs of instructions that can be macrofused. It Includes the opposite jump instructions.

The first instruction	The following instruction
cmp	jz, jc, jb, ja, jl, jg
add, sub	jz, jc, jb, ja, jl, jg
adc, sbb	None
inc, dec	jz, jl, jg
test	All jump instructions
and	All jump instructions
or, xor, not, neg	None
shift, rotate	None