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SH7785 Datasheet(PDF) 160 Page - Renesas Technology Corp |
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SH7785 Datasheet(HTML) 160 Page - Renesas Technology Corp |
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160 / 1692 page  6. Floating-Point Unit (FPU) Rev.1.00 Jan. 10, 2008 Page 130 of 1658 REJ09B0261-0100 See section 10, Instruction Descriptions of the SH-4A Extended Functions Software Manual for details of floating-point operations when a non-number (NaN) is input. 6.2.3 Denormalized Numbers For a denormalized number floating-point value, the exponent field is expressed as 0, and the fraction field as a non-zero value. When the DN bit in FPSCR of the FPU is 1, a denormalized number (source operand or operation result) is always positive or negative zero in a floating-point operation that generates a value (an operation other than transfer instructions between registers, FNEG, or FABS). When the DN bit in FPSCR is 0, a denormalized number (source operand or operation result) is processed as it is. See section 10, Instruction Descriptions of the SH-4A Extended Functions Software Manual for details of floating-point operations when a denormalized number is input. |
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