Encoding:

COP1

010001

111

df

wt

s16

6

3

2

5

16

Format: 

BNZ.df

Immediate Branch If All Elements Are Not Zero

BNZ.B wt,s16

MSA

Immediate Branch If All Elements Are Not Zero

BNZ.H wt,s16

MSA

Immediate Branch If All Elements Are Not Zero

BNZ.W wt,s16

MSA

Immediate Branch If All Elements Are Not Zero

BNZ.D wt,s16

MSA

Immediate Branch If All Elements Are Not Zero

Purpose:

Immediate Branch If All Elements Are Not Zero

Immediate PC offset branch if all destination elements are not zero.

Description: 

if wt[i] != 0 for all i then branch PC-relative s16

PC-relative branch if all elements in wt are not zero. The branch instruction has a delay slot. s16 is a PC word offset, i.e. signed count of 32-bit instructions, from the PC of the delay slot.

Restrictions:

Processor operation is UNPREDICTABLE if a branch is placed in the delay slot of a branch or jump.

Operation: 

BNZ.B:
   branch(WR[wt]8i+7..8i != 0 for all i, s16)
BNZ.H:
   branch(WR[wt]16i+15..16i != 0 for all i, s16)
BNZ.W:
   branch(WR[wt]32i+31..32i != 0 for all i, s16)
BNZ.D:
   branch(WR[wt]64i+63..64i != 0 for all i, s16)
function branch(cond, offset)
   if cond then
      I:   target_offset = (offset9)GPRLEN-12 || offset9..0 || 0^^2
      I+1: PC = PC + target_offset
   endif
endfunction branch

Exceptions:

Reserved Instruction Exception, MSA Disabled Exception.