FILD
Load Integer
Opcodes
Hex |
Mnemonic |
Encoding |
Long Mode |
Legacy Mode |
Description |
DF /5
|
FILD m64int
|
None
|
Valid
|
Valid
|
Push m64int onto the FPU register stack.
|
DB /0
|
FILD m32int
|
None
|
Valid
|
Valid
|
Push m32int onto the FPU register stack.
|
DF /0
|
FILD m16int
|
None
|
Valid
|
Valid
|
Push m16int 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.
This instruction's operation is the same in non-64-bit modes and 64-bit mode.
Pseudo Code
TOP = TOP - 1;
ST(0) = ConvertToDoubleExtendedPrecisionFP(SRC);
FPU Flags Affected
C1: Set to 1 if stack overflow occurred; set to 0 otherwise. C0, C2, C3 are undefined.
Exceptions
Floating-Point Exceptions
Exception |
Description |
#IS
|
Stack overflow occurred.
|
64-Bit Mode Exceptions
Exception |
Description |
#UD
|
If the LOCK prefix is used.
|
#AC(0)
|
If alignment checking is enabled and an unaligned memory reference is made while the current privilege level is 3.
|
#PF(fault-code)
|
If a page fault occurs.
|
#MF
|
If there is a pending x87 FPU exception.
|
#NM
|
CR0.EM[bit 2] or CR0.TS[bit 3] = 1.
|
#GP(0)
|
If the memory address is in a non-canonical form.
|
#SS(0)
|
If a memory address referencing the SS segment is in a non-canonical form.
|
Compatibility Mode Exceptions
Same exceptions as in protected mode.
Virtual-8086 Mode Exceptions
Exception |
Description |
#UD
|
If the LOCK prefix is used.
|
#AC(0)
|
If alignment checking is enabled and an unaligned memory reference is made.
|
#PF(fault-code)
|
If a page fault occurs.
|
#NM
|
CR0.EM[bit 2] or CR0.TS[bit 3] = 1.
|
#SS(0)
|
If a memory operand effective address is outside the SS segment limit.
|
#GP(0)
|
If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.
|
Real-Address Mode Exceptions
Exception |
Description |
#UD
|
If the LOCK prefix is used.
|
#NM
|
CR0.EM[bit 2] or CR0.TS[bit 3] = 1.
|
#SS
|
If a memory operand effective address is outside the SS segment limit.
|
#GP
|
If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.
|
Protected Mode Exceptions
Exception |
Description |
#UD
|
If the LOCK prefix is used.
|
#AC(0)
|
If alignment checking is enabled and an unaligned memory reference is made while the current privilege level is 3.
|
#PF(fault-code)
|
If a page fault occurs.
|
#NM
|
CR0.EM[bit 2] or CR0.TS[bit 3] = 1.
|
#SS(0)
|
If a memory operand effective address is outside the SS segment limit.
|
#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.
|