Filter
Top Products
Instruction Descriptions 4–121
4.10.16 VAX Floating Divide
Format:
Operation:
Fc ← Fav / Fbv
Exceptions:
Instruction mnemonics:
Qualifiers:
Description:
The dividend operand in register Fa is divided by the divisor operand in register Fb and the
quotient is written to register Fc.
The quotient is rounded or chopped to the specified precision and then the corresponding range
is checked for overflow/underflow. The single-precision operation on canonical single-preci-
sion values produces a canonical single-precision result.
An invalid operation trap is signaled if either operand has exp=0 and is not a true zero (that is,
VAX reserved operands and dirty zeros trap). The contents of Fc are UNPREDICTABLE if
this occurs.
A division by zero trap is signaled if Fbv is zero. The contents of Fc are UNPREDICTABLE if
this occurs.
See Section 4.7.7 for details of the stored result on overflow or underflow.
DIVx Fa.rx,Fb.rx,Fc.wx
!Floating-point Operate format
Invalid Operation
Division by Zero
Overflow
Underflow
DIVF Divide F_floating
DIVG Divide G_floating
Rounding: Chopped (/C)
Trapping: Exception Completion (/S)
Underflow Enable (/U)