參數(shù)資料
型號(hào): μPD30181
廠商: NEC Corp.
英文描述: 64-Bit RISC Microprosessor(64位RISC微處理器)
中文描述: 64位RISC Microprosessor(64位的RISC微處理器)
文件頁(yè)數(shù): 31/68頁(yè)
文件大?。?/td> 270K
代理商: ΜPD30181
31
μ
PD30700,30700L,30710
Figure 3-2. Registers of FPU
(a) When FR bit = 0
(MIPS I, MIPS II)
(b) When FR bit = 1
(MIPS III, MIPS IV)
3.3 Data Format
(1) Floating-point format
The FPU supports IEEE754 floating-point operations of 32 bits (single precision) and 64 bits (double precision).
(2) Fixed-point format
A fixed-point value is calculated in the form of 2’s complement.
Floating-point registers
(FPR)
Floating-point
general-purpose registers (FGR)
31
Floating-point registers
(FPR)
Floating-point
general-purpose registers (FGR)
63
FPR0
FPR1
FPR2
FPR3
FPR28
FPR29
FPR30
FPR31
FGR28
FGR29
FGR30
FGR31
FGR0
FGR1
FGR2
FGR3
FGR28
FGR29
FGR30
FGR31
FGR0
FGR1
FGR2
FGR3
(low-order)
(high-order)
(low-order)
(high-order)
(low-order)
(high-order)
(low-order)
(high-order)
FPR2
FPR0
FPR28
FPR30
0
0
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