Motorola DSP96002 User Manual
Page 58
MOTOROLA
DSP96002 USER’S MANUAL
5 - 5
Normalized Numbers:
Represents real numbers in the form (-1)
s
x 2
(E+1023)
x 1.f
E ........................ unbiased exponent -1022 < E < +1023
Bias of e .............. +1023 ($3FF)
e + E + bias ...................... 0 < e < 2046 ($7FE)
f ...................... Zero or Non-Zero
Mantissa................ 1.f
Denormalized Numbers:
Represents real numbers in the form (-1)
s
x 2
(E
min
-1+1023)
x 0.f
E
min
.................... -1022
Bias of e .............. +1023 ($3FF)
e ...................... 0 ($000)
f ...................... Non-Zero
Mantissa................ 0.f
Signed Zeros:
Represents real zeroes in the form (-1)
s
x 2
(E
min
-1+1023)
x 0.0
Bias of e .............. +1023 ($3FF)
e ...................... 0 ($000)
f ...................... Zero
Mantissa................ 0.f = 0.00...00
Signed Infinities:
Represents infinities in the form (-1)
s
x 2
(E
max
+1+1023)
x 1.0
Bias of e .............. n.a.
e ...................... 2047 ($7FF)
f ...................... Zero
Mantissa................ 1.f = 1.00...00
NaNs (Not-a-Number):
Represents NaNs as 2
(E
max
+1+1023)
x 1.f
s ...................... Don’t care
Bias of e .............. n.a.
e ...................... 2047 ($7FF)
f ...................... Non-Zero: 11...11 Internal (legal) QNaN
1x...xx Recognized QNaN
0x...xx SNaN
5.3
DATA ORGANIZATION IN REGISTERS
5.3.1 Data ALU Registers
The thirty Data ALU registers are 32 bits wide and may be accessed as word operands. Sets of 2 Data
ALU registers may be concatenated to form ten 64 bits registers which may be accessed as long words.
The least significant bit (LSB) is the right-most bit (bit 0) and the most significant bit (MSB) is bit 31 or 63 for
integer operands.