fcom

Compare Real

FCOM m32fp/m64fp

Compares ST(0) with source.

Details

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

Pseudocode Operation

// Compares ST(0) with source

Example

FCOM m32fp/m64fp

Encoding

Binary Layout
D8
+0
ModRM
+1
 
Format Legacy
Opcode D8 /2
Extension x87 FPU

Operands

  • src
    Memory/Reg