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MPC860 PowerQUICC UserÕs Manual
MOTOROLA
Part II. PowerPC Microprocessor Module
Branch instructions compute the effective address (EA) of the next instruction address
using the following addressing modes:
¥
Branch relative
¥
Branch conditional to relative address
¥
Branch to absolute address
¥
Branch conditional to absolute address
¥
Branch conditional to link register
¥
Branch conditional to count register
6.2.4.3.2 Branch Instructions
Table 6-12 lists the branch instructions provided by the PowerPC processors. To simplify
assembly language programming, a set of simpliÞed mnemonics and symbols is provided
for the most frequently used forms of branch conditional, compare, trap, rotate and shift,
and certain other instructions. See Appendix F, ÒSimpliÞed Mnemonics,Ó in The
Programming Environments Manual for a list of simpliÞed mnemonics.
6.2.4.3.3 Condition Register Logical Instructions
Condition register logical instructions, shown in Table 6-13, and the Move Condition
Register Field (mcrf) instruction are also deÞned as ßow control instructions.
Table 6-12. Branch Instructions
Name Mnemonic
Syntax
Branch
b
(
ba bl bla
)
target_addr
Branch Conditional
bc
(
bca bcl bcla
)
BO
,
BI
,
target_addr
Branch Conditional to Link Register
bclr
(
bclrl
)
BO
,
BI
Branch Conditional to Count Register
bcctr
(
bcctrl
)
BO
,
BI
Table 6-13. Condition Register Logical Instructions
Name Mnemonic
Syntax
Condition Register AND
crand
crb
D
,crb
A
,crb
B
Condition Register OR
cror
crb
D
,crb
A
,crb
B
Condition Register XOR
crxor
crb
D
,crb
A
,crb
B
Condition Register NAND
crnand
crb
D
,crb
A
,crb
B
Condition Register NOR
crnor
crb
D
,crb
A
,crb
B
Condition Register Equivalent
creqv
crb
D
,crb
A
,crb
B
Condition Register AND with Complement
crandc
crb
D
,crb
A
,crb
B
Condition Register OR with Complement
crorc
crb
D
,crb
A
,crb
B
Move Condition Register Field
mcrf
crf
D
,crf
S
Содержание MPC860 PowerQUICC
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