r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 163

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

6.3.2
Bit
31 to 22 —
21
20
19
18
Initial value:
Initial value:
R/W:
R/W:
bit:
bit:
Floating-Point Status/Control Register (FPSCR)
Bit Name
FR
SZ
PR
DN
R/W
31
15
R
0
0
R/W
30
14
R
0
0
Cause
R/W
29
13
R
0
0
Initial
Value
All 0
0
0
0
1
R/W
28
12
R
0
0
R/W
27
11
R
0
0
R/W
R
R/W
R/W
R/W
R/W
R/W
26
10
R
0
0
Enable (EN)
1: Denormalized number is treated as zero
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Floating-Point Register Bank
0: FPR0_BANK0 to FPR15_BANK0 are assigned to
1: FPR0_BANK0 to FPR15_BANK0 are assigned to
Transfer Size Mode
0: Data size of FMOV instruction is 32-bits
1: Data size of FMOV instruction is a 32-bit register
For relations between endian and the SZ and PR bits,
see figure 6.5.
Precision Mode
0: Floating-point instructions are executed as
1: Floating-point instructions are executed as
For relations between endian and the SZ and PR bits,
see figure 6.5.
Denormalization Mode
0: Denormalized number is treated as such
R/W
25
pair (64 bits)
single-precision operations
double-precision operations (graphics support
instructions are undefined)
R
XF0 to XF15 and FPR0_BANK1 to FPR15_BANK1
are assigned to FR0 to FR15
0
9
0
FR0 to FR15 and FPR0_BANK1 to FPR15_BANK1
are assigned to XF0 to XF15
R/W
24
R
0
8
0
R/W
23
R
0
7
0
R/W
Rev.1.00 Jan. 10, 2008 Page 133 of 1658
22
R
0
6
0
R/W
R/W
FR
21
0
5
0
R/W
R/W
Flag
SZ
20
4
0
0
6. Floating-Point Unit (FPU)
R/W
R/W
PR
19
0
3
0
R/W
R/W
REJ09B0261-0100
DN
18
1
2
0
R/W
R/W
17
0
1
0
Cause
RM
R/W
R/W
16
0
0
1