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INSTRUCTION SET REFERENCE
FDIV/FDIVP/FIDIVDivide (Continued)
FPU Flags Affected
C1
Set to 0 if stack underflow occurred.
Indicates rounding direction if the inexact result exception (#P) is gener-
ated: 0 = not roundup; 1 = roundup.
C0, C2, C3
Undefined.
Floating-Point Exceptions
#IS
Stack underflow occurred.
#IA
Operand is an sNaN value or unsupported format.
± / ±?
;
±
0 /
±
0
#D
Result is a denormal value.
#Z
DEST /
±
0, where DEST is not equal to
±
0.
#U
Result is too small for destination format.
#O
Result is too large for destination format.
#P
Value cannot be represented exactly in destination format.
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.
#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.
#AC(0)
If alignment checking is enabled and an unaligned memory reference is
made while the current privilege level is 3.
Real-Address Mode Exceptions
#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.
#NM
EM or TS in CR0 is set.
