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SH7672 Datasheet(PDF) 103 Page - Renesas Technology Corp |
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SH7672 Datasheet(HTML) 103 Page - Renesas Technology Corp |
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103 / 1292 page  Section 3 Floating-Point Unit (FPU) Rev. 1.00 Nov. 14, 2007 Page 77 of 1262 REJ09B0437-0100 Table 3.1 Floating-Point Number Formats and Parameters Parameter Single-Precision Double-Precision Total bit width 32 bits 64 bits Sign bit 1 bit 1 bit Exponent field 8 bits 11 bits Fraction field 23 bits 52 bits Precision 24 bits 53 bits Bias +127 +1023 E max +127 +1023 E min –126 –1022 Floating-point number value v is determined as follows: If E = E max + 1 and f ≠ 0, v is a non-number (NaN) irrespective of sign s If E = E max + 1 and f = 0, v = (–1) s (infinity) [positive or negative infinity] If E min ≤ E ≤ Emax , v = (–1) s2E (1.f) [normalized number] If E = E min – 1 and f ≠ 0, v = (–1) s2Emin (0.f) [denormalized number] If E = E min – 1 and f = 0, v = (–1) s0 [positive or negative zero] |
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