Texas Instruments TMS34010 Reference Guide

Runtime Environment - Floating-Point Support
5.7.1.1 Single-Precision Floating-Point Format
31 32
MSB
Figure 5-3 illustrates the single-precision floating-point format. Single-
precision values are represented in 32 bits: a sign bit (bit 31 ), an 8-bit biased
exponent (bits 23-30), and a 23-bit mantissa (bits 0-22).
23 22
o
LSB
Figure 5-3. Single-Precision Format
Given a sign bit s, an exponent e, and a mantissa f, the value V of the float-
ing-point number X= (s,e,f) is:
• If s=O, e=255, and f=O, the V = + 00
• If s=1, e=255, and f=O, the V = -00
• If 0<e<255 and f:l:O, then V = (-1)S x 2
e
-
127
(.f); V is not valid if
X= (s,e,f) is not a normalized floating-point number
• If s=O, e=O, and f=O, the V = 0
• For all other cases, V = not valid
Precision of single-precision values is greater than six decimal digits; the range
includes:
• Positive values: 5.87747 x 10-
39
to 1.70141 x 10
38
• Negative values: -1.70141 x 10
38
to -5.87747 x 10-
39
• 0
• ±oo
5.7.1.2 Double-Precision Floating-Point Format
63 62
Figure 5-4 illustrates the double-precision floating-point format. Double-
precision values are represented in 64 bits: a sign bit (bit 63) an 11-bit biased
exponent (bits 52-62), and a 52-bit mantissa (bits 0-51).
52 51
o
.!~'... ~:'. ,"
MSB
5-18
LSB
Figure 5-4. Double-Precision Format
Given a sign bit s, an exponent e, and a mantissa f, the value V of the float-
ing-point number X= (s,e,f) is:
• If s=O, e=2047, and f=O, the V = +00
• If s=1, e=2047, and f=O, the V = -00

Texas Instruments TMS34010 Specifications

General

Brand	Texas Instruments
Model	TMS34010
Category	Computer Hardware
Language	English