Overview of IEEE Standard Single- and Double-Precision Formats

Table 3−3. IEEE Floating-Point Notations

Symbol

Meaning

 

 

s

Sign bit

e

Exponent field

f

Fraction (mantissa) field

x

Can have value of 0 or 1 (don’t care)

NaN

Not-a-Number (SNaN or QNaN)

SNaN

Signal NaN

QNaN

Quiet NaN

NaN_out

QNaN with all bits in the f field = 1

Inf

Infinity

LFPN

Largest floating-point number

SFPN

Smallest floating-point number

LDFPN

Largest denormalized floating-point number

SDFPN

Smallest denormalized floating-point number

signed Inf

+infinity or −infinity

signed NaN_out

NaN_out with s = 0 or 1

 

 

3-10

Instruction Set

SPRU733

Page 70
Image 70
Texas Instruments TMS320C67X/C67X+ DSP manual 3. Ieee Floating-Point Notations, Sdfpn