r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 165

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

<Big endian>
<Little endian>
Floating-point register
Floating-point register
Memory area
Memory area
Notes: 1. In the case of SZ = 0 and PR = 0, DR register can not be used.
Figure 6.5 Relation between SZ Bit and Endian
8n
4n+3
63
63
63
63
63
63
2. The bit-location of DR register is used for double precision format when PR = 1.
FR (2i)
FR (2i)
(In the case of (2), it is used when PR is changed from 0 to 1.)
8n+3
(1) SZ = 0
DR (2i)
32 31
DR (2i)
4n
32 31
4m+3
8n+4
FR (2i+1)
FR (2i+1)
8n+7
*
1
4m
, *
0
0
0
0
0
0
2
8n+3
63
63
63
FR (2i)
(2) SZ = 1, PR = 0
DR (2i)
8n
32 31
8n+7
FR (2i+1)
Rev.1.00 Jan. 10, 2008 Page 135 of 1658
8n+4
*
0
2
0
0
8n+7
63
63
63
FR (2i)
6. Floating-Point Unit (FPU)
(3) SZ = 1, PR = 1
8n+4
DR (2i)
32 31
8n+3
FR (2i+1)
REJ09B0261-0100
8n
0
0
0