SH7058 Datasheet, PDF (102/1130 Pages) Renesas Technology Corp – Renesas SuperHTM RISC engine

Section 3 Floating-Point Unit (FPU)
3.1 Overview
The SH7058 has an on-chip floating-point unit (FPU), The FPU’s register configuration is shown
in figure 3.1.
Floating-point registers
31
FR0
FR1
FR2
FR3
FR4
FR5
FR6
FR7
FR8
FR9
FR10
FR11
FR12
FR13
FR14
FR15
0
FR0 functions as the index register
for the FMAC instruction.
Floating-point system registers
31
0 _{Floating-point communication register}
FPUL
Specifies buffer as communication register between CPU
and FPU*.
31
0 _{Floating-point status/control register}
FPSCR
Indicates status/control information relating to FPU
exceptions*.
Note: * For details, see section 3.2, Floating-Point Registers and Floating-Point System Registers.
Figure 3.1 Overview of Register Configuration
(Floating-Point Registers and Floating-Point System Registers)
Rev. 3.0, 09/04, page 61 of 1086