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3
3-23 M32R-FPU Software Manual (Rev.1.01)
BNCBNC
branch instruction
Branch on not C-bit
[Mnemonic]
(1) BNC pcdisp8
(2)
BNC pcdisp24
[Function]
Branch
(1) if (C==0) PC = ( PC & 0xfffffffc ) + ( ( ( signed char ) pcdisp8 ) << 2 );
(2) if (C==0) PC = ( PC & 0xfffffffc ) + ( sign_extend ( pcdisp24 ) << 2 );
where
#define sign_extend(x) ( ( ( signed ) ( (x)<< 8 ) ) >>8 )
[Description]
BNC branches to the specified label when the condition bit (C) is 0.
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]
11011111
11010111
BNC pcdisp24
BNC pcdisp8
pcdisp8
pcdisp24
INSTRUCTIONS
3.2 Instruction description