IBM POWERPC 750GL User Manual
Page 110
User’s Manual
IBM PowerPC 750GX and 750GL RISC Microprocessor
Programming Model
Page 110 of 377
gx_02.fm.(1.2)
March 27, 2006
DBAT7L
575
10001
11111
Supervisor (OEA)
Both
DBAT7U
574
10001
11110
Supervisor (OEA)
Both
DEC
22
00000
10110
Supervisor (OEA)
Both
DSISR
18
00000
10010
Supervisor (OEA)
Both
EAR
282
01000
11010
Supervisor (OEA)
Both
IBAT0L
529
10000
10001
Supervisor (OEA)
Both
IBAT0U
528
10000
10000
Supervisor (OEA)
Both
IBAT1L
531
10000
10011
Supervisor (OEA)
Both
IBAT1U
530
10000
10010
Supervisor (OEA)
Both
IBAT2L
533
10000
10101
Supervisor (OEA)
Both
IBAT2U
532
10000
10100
Supervisor (OEA)
Both
IBAT3L
535
10000
10111
Supervisor (OEA)
Both
IBAT3U
534
10000
10110
Supervisor (OEA)
Both
IBAT4L
561
10001
10001
Supervisor (OEA)
Both
IBAT4U
560
10001
10000
Supervisor (OEA)
Both
IBAT5L
563
10001
10011
Supervisor (OEA)
Both
IBAT5U
562
10001
10010
Supervisor (OEA)
Both
IBAT6L
565
10001
10101
Supervisor (OEA)
Both
IBAT6U
564
10001
10100
Supervisor (OEA)
Both
IBAT7L
567
10001
10111
Supervisor (OEA)
Both
IBAT7U
566
10001
10110
Supervisor (OEA)
Both
LR
8
00000
01000
User (UISA)
Both
PVR
287
01000
11111
Supervisor (OEA)
mfspr
SDR1
25
00000
11001
Supervisor (OEA)
Both
SPRG0
272
01000
10000
Supervisor (OEA)
Both
SPRG1
273
01000
10001
Supervisor (OEA)
Both
SPRG2
274
01000
10010
Supervisor (OEA)
Both
SPRG3
275
01000
10011
Supervisor (OEA)
Both
SRR0
26
00000
11010
Supervisor (OEA)
Both
SRR1
27
00000
11011
Supervisor (OEA)
Both
Table 2-33. PowerPC Encodings
(Page 2 of 3)
Register Name
SPR
1
Access
mfspr/mtspr
Decimal
SPR[5–9]
SPR[0–4]
Note:
1. The order of the two 5-bit halves of the SPR number is reversed compared with actual instruction coding. For mtspr and mfspr
instructions, the SPR number coded in assembly language does not appear directly as a 10-bit binary number in the instruction.
The number coded is split into two 5-bit halves that are reversed in the instruction, with the high-order five bits appearing in bits
16–20 of the instruction and the low-order five bits in bits 11–15.
2. The TB Registers are referred to as TBRs rather than SPRs and can be written to using the mtspr instruction in supervisor mode
and the TBR numbers here. The TB Registers can be read in user mode using either the mftb or mfspr instruction and specifying
TBR 268 for TBL and SPR 269 for TBU.