Stereo System User Manual

A - 58 DSP96002 USER’S MANUAL MOTOROLA
BSR Branch to Subroutine BSR
11 1111 0000 0000
31 14 13 0
PC RELATIVE DISPLACEMENT
0000 0011 0100 0000 00
11 1111 0000 0000
31 14 13 0
0000 0011 0100 001R
11 1111 0aaa aaaa
31 14 13 0
0000 0011 11aa aaaa aa
Operation:
PC → SSH; SR → SSL; PC+xx→ PC
PC → SSH; SR → SSL; PC+xxxx→ PC
PC → SSH; SR → SSL; PC+Rn→ PC
Assembler Syntax:
BSR label (short)
BSR label
BSR Rn
Description:
The address of the instruction immediately following the BSR instruction and the status register are pushed
onto the stack. Program execution then continues at location PC+displacement. The PC contains the ad-
dress of the next instruction. The displacement is a 2’s complement 32-bit integer that represents the
relative distance from the current PC to the destination PC. Short Displacement, Long Displacement and
Address Register PC Relative addressing modes may be used. The Short Displacement 15-bit data is
sign extended to form the PC relative displacement. See Section A.10 for restrictions.
CCR Condition Codes: Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: BSR label (short)
Instruction Format: BSR label
Instruction Format: BSR Rn