Renesas M32R-FPU Manual do Utilizador descarregar pdf (Página 64)

3-26

M32R-FPU Software Manual (Rev.1.01)

BRABRA

branch instruction

Branch

[Mnemonic]

(1) BRA pcdisp8

(2)

BRA pcdisp24

[Function]

Branch

(1) PC = ( PC & 0xfffffffc ) + ( ( ( signed char ) pcdisp8 ) << 2 );

(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]

11111111

11110111

BRA pcdisp24

BRA pcdisp8

pcdisp8

pcdisp24

INSTRUCTIONS

3.2 Instruction description

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 193 194

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