Computer Hardware User's Guide

LDE Load Floating-Point Exponent
13-112
Syntax LDE src, dst
Operation src ( exp ) → dst ( exp )
Operands src general addressing modes (G):
0 0 register (R n , 0 ≤ n ≤ 7)
0 1 direct
1 0 indirect (disp = 0–255, IR0, IR1)
1 1 immediate
dst register (R n , 0 ≤ n ≤ 7)
Opcode
31 2423 16 8 7 015
000 00 0
1 11
dst src
G
Description The exponent field of the src operand is loaded into the exponent field of the
dst register. No modification of the dst register mantissa field is made unless
the value of the exponent loaded is the reserved value of the exponent for 0
as determined by the precision of the src operand. Then the mantissa field of
the dst register is set to 0. The src and dst operands are assumed to be float-
ing-point numbers. Immediate values are evaluated in the short floating-point
format.
Cycles 1
Status Bits LUF Unaffected
LV Unaffected
UF Unaffected
N Unaffected
Z Unaffected
V Unaffected
C Unaffected
OVM Operation is not affected by OVM bit value.Mode Bit