x86 Instruction Set Reference

FILD

Load Integer

Opcode	Mnemonic	Description
`DF /0`	`FILD m16int`	Push m16int onto the FPU register stack.
`DB /0`	`FILD m32int`	Push m32int onto the FPU register stack.
`DF /5`	`FILD m64int`	Push m64int onto the FPU register stack.

Description
Converts the signed-integer source operand into double extended-precision floating-point format and pushes the value onto the FPU register stack. The source operand can be a word, doubleword, or quadword integer. It is loaded without rounding errors. The sign of the source operand is preserved.

Operation
Top = Top - 1; ST(0) = ConvertToExtendedDouble(Source);

FPU flags affected
C1 Set to 1 if stack overflow occurred; set to 0 otherwise. C0, C2, C3 Undefined.

Floating-Point Exceptions

#IS Stack overflow occurred.

Protected Mode Exceptions

`#GP(0)`	If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit. If the DS, ES, FS, or GS register contains a null segment selector.
`#GP(0)`	If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit. If the DS, ES, FS, or GS register contains a null segment selector.
`#SS(0)`	If a memory operand effective address is outside the SS segment limit.
`#NM`	EM or TS in CR0 is set.
`#PF(fault-code)`	If a page fault occurs.

Real-Address Mode Exceptions

`#GP`	If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.
`#GP`	If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.
`#SS`	If a memory operand effective address is outside the SS segment limit.

Virtual-8086 Mode Exceptions

`#GP(0)`	If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.
`#GP(0)`	If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.
`#SS(0)`	If a memory operand effective address is outside the SS segment limit.
`#NM`	EM or TS in CR0 is set.
`#PF(fault-code)`	If a page fault occurs.