fucom

Unordered Compare Real

FUCOM ST(i)

Compares ST(0) with source (supports NaNs).

Details

The Unordered Compare Real instruction compares ST(0) with source (supports NaNs).

Pseudocode Operation

// Compares ST(0) with source (supports NaNs)

Example

FUCOM st(1)

Encoding

Binary Layout
DD
+0
 
Format Legacy
Opcode DD E0+i
Extension x87 FPU

Operands

  • src
    Reg