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INSTRUCTIONS
3.2 Instruction description
branch instruction
BRA
BRA
Branch
[Mnemonic]
➀
➁
BRA
BRA
pcdisp8
pcdisp24
[Function]
Branch
➀
➁
PC = ( PC & 0xfffffffc ) + ( ( ( signed char ) pcdisp8 ) << 2 );
PC = ( PC & 0xfffffffc ) + ( sign_extend ( pcdisp24 ) << 2 );
where
#define sign_extend(x) ( ( ( signed ) ( (x)<< 8 ) ) >>8 )
[Description]
BRA causes an unconditional branch to the address specified by the label.
There are two instruction formats; this allows software, such as an assembler, to decide on the
better format.
The condition bit (C) is unchanged.
[EIT occurrence]
None
[Encoding]
0111 1111
1111 1111
pcdisp8
BRA
pcdisp8
pcdisp24
M32R family Software Manual
BRA
pcdisp24
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