Motorola DSP96002 - Manual (Page 768)

D-16 DSP96002 USER’S MANUAL MOTOROLA
the register will yield the wrong data in this case.
D.1.5.1.1.3 Denormalized Numbers In Double Precision (DP)
This section describes what happens when a 64-bit source (denormalized double precision) is writen by a
double precision floating-point move and the data is stored in a Data ALU floating-point register D0-D9.
SP move into the register
0 00000000 0100 ..... 00
\ /
inv
/ \
0 1 0 Zero 01110000000 0 0100 ............................. 00
SP read of the register
0 1 0 Zero 01110000000 0 0100 ............................. 00
\ /
/ \
0 00000000 0100 ..... 00 Data read correctly
(read as 2**(-128))
DP read of the register
0 1 0 Zero 01110000000 0 0100 ............................. 00
\ /
/ \
0 01110000000 0100 ...... 00 Data read
incorrectly (read
as 1.01x2**( 127))