SH7261 Datasheet, PDF (101/1348 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 3 Floating-Point Unit (FPU)
Table 3.2 Floating-Point Ranges
Type
Signaling non-number
Quiet non-number
Positive infinity
Positive normalized
number
Positive denormalized
number
Positive zero
Negative zero
Negative denormalized
number
Negative normalized
number
Negative infinity
Quiet non-number
Signaling non-number
Single-Precision
Double-Precision
H'7FFF FFFF to H'7FC0 0000 H'7FFF FFFF FFFF FFFF to
H'7FF8 0000 0000 0000
H'7FBF FFFF to H'7F80 0001 H'7FF7 FFFF FFFF FFFF to
H'7FF0 0000 0000 0001
H'7F80 0000
H'7FF0 0000 0000 0000
H'7F7F FFFF to H'0080 0000 H'7FEF FFFF FFFF FFFF to
H'0010 0000 0000 0000
H'007F FFFF to H'0000 0001 H'000F FFFF FFFF FFFF to
H'0000 0000 0000 0001
H'0000 0000
H'0000 0000 0000 0000
H'8000 0000
H'8000 0000 0000 0000
H'8000 0001 to H'807F FFFF H'8000 0000 0000 0001 to
H'800F FFFF FFFF FFFF
H'8080 0000 to H'FF7F FFFF H'8010 0000 0000 0000 to
H'FFEF FFFF FFFF FFFF
H'FF80 0000
H'FFF0 0000 0000 0000
H'FF80 0001 to H'FFBF FFFF H'FFF0 0000 0000 0001 to
H'FFF7 FFFF FFFF FFFF
H'FFC0 0000 to H'FFFF FFFF H'FFF8 0000 0000 0000 to
H'FFFF FFFF FFFF FFFF
3.2.2 Non-Numbers (NaN)
Figure 3.3 shows the bit pattern of a non-number (NaN). A value is NaN in the following case:
• Sign bit: Don't care
• Exponent field: All bits are 1
• Fraction field: At least one bit is 1
The NaN is a signaling NaN (sNaN) if the MSB of the fraction field is 1, and a quiet NaN (qNaN)
if the MSB is 0.
Rev. 2.00 Sep. 07, 2007 Page 69 of 1312
REJ09B0320-0200