Motorola DSP96002 - Manual (Page 230)

A - 42 DSP96002 USER’S MANUAL MOTOROLA
Description:
Program execution continues at location PC+displacement. The PC contains the address of the next in-
struction. 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: BRA label (short)
BRA Branch Always BRA
Instruction Fields:
Rn - R0-R7
Long PC Relative Displacement - 32 bits
Short PC Relative Displacement - aaaaaaaaaaaaaaa (15 bits)
Timing: 6 + jx oscillator clock cycles
Memory: 1 + ea program words
11 1111 0000 0000
31 14 13 0
PC RELATIVE DISPLACEMENT
0000 0011 0000 0000 00
11 1111 0000 0000
31 14 13 0
0000 0011 0000 001R
11 1111 0aaa aaaa
31 14 13 0
0000 0011 10aa aaaa aa
Operation:
PC+xx
→
PC
PC+xxxx
→
PC
PC+Rn
→
PC
Assembler Syntax:
BRA label (short)
BRA label
BRA Rn
Instruction Format: BRA label
Instruction Format: BRA Rn