HD6417750RF240DV Datasheet, PDF (239/1132 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7750 Series

SH7750, SH7750S, SH7750R Group
Section 6 Floating-Point Unit (FPU)
Table 6.2 shows the ranges of the various numbers in hexadecimal notation.
Table 6.2 Floating-Point Ranges
Type
Signaling non-number
Single-Precision
H'7FFFFFFF to H'7FC00000
Quiet non-number
H'7FBFFFFF to H'7F800001
Positive infinity
Positive normalized
number
Positive denormalized
number
Positive zero
Negative zero
Negative denormalized
number
Negative normalized
number
Negative infinity
Quiet non-number
H'7F800000
H'7F7FFFFF to H'00800000
H'007FFFFF to H'00000001
H'00000000
H'80000000
H'80000001 to H'807FFFFF
H'80800000 to H'FF7FFFFF
H'FF800000
H'FF800001 to H'FFBFFFFF
Signaling non-number
H'FFC00000 to H'FFFFFFFF
Double-Precision
H'7FFFFFFF FFFFFFFF to
H'7FF80000 00000000
H'7FF7FFFF FFFFFFFF to
H'7FF00000 00000001
H'7FF00000 00000
H'7FEFFFFF FFFFFFFF to
H'00100000 00000000
H'000FFFFF FFFFFFFF to
H'00000000 00000001
H'00000000 00000000
H'80000000 00000000
H'80000000 00000001 to
H'800FFFFF FFFFFFFF
H'80100000 00000000 to
H'FFEFFFFF FFFFFFFF
H'FFF00000 00000000
H'FFF00000 00000001 to
H'FFF7FFFF FFFFFFFF
H'FFF80000 00000000 to
H'FFFFFFFF FFFFFFFF
6.2.2 Non-Numbers (NaN)
Figure 6.3 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.
R01UH0456EJ0702 Rev. 7.02
Sep 24, 2013
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