R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 129

Manufacturer Part Number

R0K572030S000BE

KIT DEV FOR SH7203

Manufacturer

Renesas Electronics America

Renesas Starter Kits (RSK)r

CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM

Silicon Manufacturer

Kit Contents

Silicon Family Name

Silicon Core Number

R5S72030W200FP

Tool / Board Applications

General Purpose MCU, MPU, DSP, DSC

Mcu Supported Families

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

For Use With/related Products

Lead Free Status / Rohs Status

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.

An sNaN is input in an operation, except copy, FABS, and FNEG, that generates a floating-point

• When the EN.V bit in FPSCR is 0, the operation result (output) is a qNaN.

• When the value of the EN.V bit in FPSCR is 1, FPU exception handling is triggered by an

If a qNaN is input in an operation that generates a floating-point value, and an sNaN has not been

input in that operation, the output will always be a qNaN irrespective of the setting of the EN.V bit

in FPSCR. An exception will not be generated in this case.

The qNAN values as operation results are as follows:

• Single-precision qNaN: H'7FBF FFFF

• Double-precision qNaN: H'7FF7 FFFF FFFF FFFF

See the individual instruction descriptions for details of floating-point operations when a non-

number (NaN) is input.

invalid operation exception. In this case, the contents of the operation destination register are

Non-Numbers (NaN)

Figure 3.3 Single-Precision NaN Bit Pattern

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Rev. 3.00 Sep. 28, 2009 Page 97 of 1650

Section 3 Floating-Point Unit (FPU)

REJ09B0313-0300