B.4.83. `FILD', `FIST', `FISTP': Floating-Point/Integer Conversion
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FILD mem16 ; DF /0 [8086,FPU]
FILD mem32 ; DB /0 [8086,FPU]
FILD mem64 ; DF /5 [8086,FPU]
FIST mem16 ; DF /2 [8086,FPU]
FIST mem32 ; DB /2 [8086,FPU]
FISTP mem16 ; DF /3 [8086,FPU]
FISTP mem32 ; DB /3 [8086,FPU]
FISTP mem64 ; DF /7 [8086,FPU]
`FILD' loads an integer out of a memory location, converts it to a
real, and pushes it on the FPU register stack. `FIST' converts `ST0' to
an integer and stores that in memory; `FISTP' does the same as `FIST',
but pops the register stack afterwards.