ENTERD - x86-64 instruction reference

enterdCreate 32-bit stack frame 
Creates a frame with 32-bit frame pointers; unavailable in 64-bit mode.
386 and later·Not available in 64-bit mode
Intel's reference: ENTER 
CFPFAFZFSFDFOF –––––––
Changes no flag
Forms  enterd ,   
 enterd   
Operands imm16 A 16-bit immediate, -32768 to 65535. 
imm8 An 8-bit immediate, -128 to 255. Instructions that sign-extend it to a wider operand interpret the byte as -128 to 127; shift counts do not use this sign extension. 
The first operand reserves an unsigned 16-bit byte count for local storage; the second supplies a nesting level modulo 32, with zero assumed if omitted. This 32-bit operand-size form is unavailable in 64-bit mode.