Renesas M32R-FPU Manual Do Utilizador

3

3-20

M32R-FPU Software Manual (Rev.1.01)

branch instruction

 

 BL  pcdisp8

 

 BL  pcdisp24

Subroutine call (PC relative)

(1)  R14 = ( PC & 0xfffffffc ) + 4;

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

(2)  R14 = ( PC & 0xfffffffc ) + 4;

       PC = ( PC & 0xfffffffc ) + ( sign_extend ( pcdisp24 ) << 2 );

where

#define  sign_extend(x) ( ( ( signed ) ( (x)<< 8 ) ) >>8 )

BL causes an unconditional branch to the address specified by the label and puts the return

address in R14.

There are two instruction formats; this allows software, such as an assembler, to decide on the

better format.

The condition bit (C) is unchanged.

None

INSTRUCTIONS

3.2 Instruction description