Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1424

FDIV/FDIVP/FIDIV—Divide (Continued)
SRC
Notes:
Fmeans finite-real number.
Imeans integer.
*indicates floating-point invalid-arithmetic-operand (#IA) exception.
**indicates floating-point zero-divide (#Z) exception.
Operation
IF SRC 0
THEN
#Z
ELSE
IF instruction is FIDIV
FI;
FI;
IF instruction = FDIVP
THEN
PopRegisterStack
FI;
FPU Flags Affected
C1
C0, C2, C3
4:122
 F
-•
- 
* +0
 F + 
+F
 I + 
+F
 0 + 
**
+0 -• **
 F
+I -•
 F
+F -•
+   0
*
NaN NaN NaN
THEN
DEST  DEST  ConvertExtendedReal(SRC);
ELSE (* source operand is real number *)
DEST  DEST  SRC;
Set to 0 if stack underflow occurred.
Indicates rounding direction if the inexact-result exception (#P) is
generated: 0 = not roundup; 1 = roundup.
Undefined.
DEST
 0
+0 +F
 0  0
+0
 0  F
+0
 0  F
+0
* * **
* * **
 0
+0 +F
 0
+0 +F
 0
+0 +0
NaN NaN NaN
Volume 4: Base IA-32 Instruction Reference
+ 
NaN
* NaN
-• NaN
-• NaN
-• NaN
+ 
NaN
+ 
NaN
+ 
NaN
* NaN
NaN NaN