APPENDIX A MIPS III INSTRUCTION SET DETAILS
Preliminary Users Manual S15543EJ1V0UM 455
BGTZL Branch On Greater Than Zero Likely BGTZL
rs

BGTZL

0 1 0 1 1 1

0
0 0 0 0 0 offset
31 26 25 21 20 16 15 0
655 16
Format:
BGTZL rs, offset
Description:
A branch target address is computed from the sum of the address of the instruction in the delay slot and the 16-bit
offset
, shifted left two bits and sign-extended. The contents of general register
rs
are compared to zero. If the
contents of general register
rs
are greater than zero, then the program branches to the target address, with a delay
of one instruction. If the conditional branch is not taken, the instruction in the branch delay slot is nullified.
Operation:
32 T: target (offset15)14 || offset || 02
condition (GPR [rs]31 = 0) and (GPR [rs] 032)
T+1: if condition then
PC PC + target
else
NullifyCurrentInstruction
endif
64 T: target (offset15)
46
|| offset || 0
2
condition (GPR [rs]63 = 0) and (GPR [rs] 064)
T+1: if condition then
PC PC + target
else
NullifyCurrentInstruction
endif
Exceptions:
None