RCA 70/46 - Load Complement (LCER) (LCDR)

Load Complement
(LCER) (LCDR)
General Descript~on
Format
(RR Short)
(RR Long)
Condition Code
Interrupt Action
Notes
Floating-Point Instructions
• The operand in the floating-point register specified by the second address
(R
2
)
is loaded into the floating-point register specified by the first address
(R
1
)
and the sign is changed to the opposite value. The sign and magnitude
of the loaded operand determine the condition code.
(LCER) 33
o
7 8 11 12 15
(LCDR) 23
o
7 8
11 12 15
• 0 - result mantissa, is zero.
1 -
result mantissa is less than zero.
2 -
result mantissa is greater than zero.
3
-not used.
• Address error:
S pecifica tion.
• 1. The exponent and mantissa are unaltered.
2.
Short operands do not alter the low-order half of the register specified
by the first address.
207