How to move value from the stack to ST(0)?

Question

I am having trouble believing the following code is the most efficient way to move a value from the stack to ST(0):

.data
var dd 4.2
tmp dd ?

.code
mov EAX, var
push EAX
; top of stack now contains a value

; move it to ST(0)
pop EAX
mov tmp, EAX
fld tmp

Is the temporary variable really necessary? Further, is there an easier way to get a value from the stack to ST(0)?

Update: In the example above, I'm moving floating-point values around - not integers.

Answer 1

fld dword ptr [esp]    ; assembles to D9 04 24