R5S72611 RENESAS [Renesas Technology Corp], R5S72611 Datasheet - Page 99
R5S72611
Manufacturer Part Number
R5S72611
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5S72611.pdf
(1348 pages)
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3.1
The FPU has the following features.
• Conforms to IEEE754 standard
• 16 single-precision floating-point registers (can also be referenced as eight double-precision
• Two rounding modes: Round to nearest and round to zero
• Denormalization modes: Flush to zero
• Five exception sources: Invalid operation, divide by zero, overflow, underflow, and inexact
• Comprehensive instructions: Single-precision, double-precision, and system control
When the FD bit in SR is set to 1, the FPU cannot be used, and an attempt to execute an FPU
instruction will cause an FPU disable exception.
3.2
3.2.1
A floating-point number consists of the following three fields:
• Sign (s)
• Exponent (e)
• Fraction (f)
This LSI can handle single-precision and double-precision floating-point numbers, using the
formats shown in figures 3.1 and 3.2.
registers)
Features
Data Formats
Floating-Point Format
31
s
Figure 3.1 Format of Single-Precision Floating-Point Number
30
Section 3 Floating-Point Unit (FPU)
e
23
22
Rev. 2.00 Sep. 07, 2007 Page 67 of 1312
f
Section 3 Floating-Point Unit (FPU)
REJ09B0320-0200
0
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