r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 155

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

6.1
The FPU has the following features.
• Conforms to IEEE754 standard
• 32 single-precision floating-point registers (can also be referenced as 16 double-precision
• Two rounding modes: Round to Nearest and Round to Zero
• Two denormalization modes: Flush to Zero and Treat Denormalized Number
• Six exception sources: FPU Error, Invalid Operation, Divide By Zero, Overflow, Underflow,
• Comprehensive instructions: Single-precision, double-precision, graphics support, and system
• In the SH-4A, the following three instructions are added on to the instruction set of the SH-4
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 (general FPU disable exception or slot FPU
disable exception).
registers)
and Inexact
control
FSRRA, FSCA, and FPCHG
Features
Section 6 Floating-Point Unit (FPU)
Rev.1.00 Jan. 10, 2008 Page 125 of 1658
6. Floating-Point Unit (FPU)
REJ09B0261-0100