RCA 70/46 User Manual

Add Unnormalized
(AUR) (AU)
(AWR) (AWl
General Description
Format
(RR Short)
(RX Short)
(RR long)
(RX long)
Condition Code
Interrupt
Action
Floating-Point Instructions
• The operand specified by the second address (R
2
or X
2
/B
2
/D
2
)
is added
to
the operand in the floating-point register specified by the first address
(R
1
). The unnormalized sum is loaded into the register specified by the
first address. The sign and magnitude of the loaded sum determine the
condition code.
o 7 8 11 12 15
o
7 8 11 12 15 16 19 20
o 7 8 11 12 15
o
7 8 11 12 15 16 19 20
• 0 - result mantissa is zero.
1 -
result mantissa is less than zero.
2 -
result mantissa is greater than zero.
3 - result exponent overflows.
• Address error:
Addressing (RX format).
Specification.
Exponent overflow.
Significance.
31
31
Notes • 1. The Add Unnormalized is similar to the Add Normalized, except that
the sum is not normalized by this instruction and exponent underflow
cannot occur.
212

RCA 70/46 Specifications

General

Brand	RCA
Model	70/46
Category	Computer Hardware
Language	English