Encoding:

Format:

ADD_A.df 

ADD_A.B wd,ws,wt

ADD_A.H wd,ws,wt

ADD_A.W wd,ws,wt

ADD_A.D wd,ws,wt

Purpose:

Vector Add Absolute Values

Vector addition to vector using the absolute values.

Description:

wd[i] = absolute_value(ws[i]) + absolute_value(wt[i])

The absolute values of the elements in v ector wt are added to the absolute values of the elements in v ector ws. The result is written to vector wd.

The operands and results are values in integer data format df.

Restrictions:

No data-dependent exceptions are possible.

Operation:

ADD_A.B:
   for i in 0 .. WRLEN/8-1
      WR[wd]8i+7..8i = abs(WR[ws]8i+7..8i, 8) + abs(WR[wt]8i+7..8i, 8)
   endfor
ADD_A.H:
   for i in 0 .. WRLEN/16-1
      WR[wd]16i+15..16i = abs(WR[ws]16i+15..16i, 16) + abs(WR[wt]16i+15..16i, 16)
   endfor
ADD_A.W:
   for i in 0 .. WRLEN/32-1
      WR[wd]32i+31..32i = abs(WR[ws]32i+31..32i, 32) + abs(WR[wt]32i+31..32i, 32)
   endfor
ADD_A.D:
   for i in 0 .. WRLEN/64-1
      WR[wd]64i+63..64i = abs(WR[ws]64i+63..64i, 64) + abs(WR[wt]64i+63..64i, 64)
   endfor
function abs(tt, n)
   if ttn-1 = 1 then
      return -ttn-1...0
   else
      return ttn-1..0
   endif
endfunction abs

Exceptions:

Reserved Instruction Exception, MSA Disabled Exception.