fyl2x

Y * log2(X)

FYL2X

Computes ST(1) * log2(ST(0)).

Details

The Y * log2(X) instruction computes ST(1) * log2(ST(0)).

Pseudocode Operation

// Computes ST(1) * log2(ST(0))

Example

FYL2X

Encoding

Binary Layout
D9
+0
F1
+1
 
Format Legacy
Opcode D9 F1
Extension x87 FPU

Operands