Encoding:

Format:

SRARI.df 

SRARI.B wd,ws,m

SRARI.H wd,ws,m

SRARI.W wd,ws,m

SRARI.D wd,ws,m

Purpose:

Immediate Shift Right Arithmetic Rounded

Immediate bit count shift right arithmetic with rounding

Description:

wd[i] = ws[i] >>(rounded) m

The elements in v ector ws are shifted right arithmetic by m bits. The most significant discarded bit is added to the shifted value (for rounding) and 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:

SRARI.B
   for i in 0 .. WRLEN/8-1
      WR[wd]8i+7..8i = srar(WR[ws]8i+7..8i,  m, 8)
   endfor
SRARI.H
   for i in 0 .. WRLEN/16-1
      WR[wd]16i+15..16i = srar(WR[ws]16i+15..16i, m, 16)
   endfor
SRARI.W
   for i in 0 .. WRLEN/32-1
      WR[wd]32i+31..32i = srar(WR[ws]32i+31..32i, m, 32)
   endfor
SRARI.D
   for i in 0 .. WRLEN/64-1
      WR[wd]64i+63..64i = srar(WR[ws]64i+63..64i, m, 64)
   endfor
function srar(ts, n, b)
   if n = 0 then
      return ts
   else
      return ((tsb-1)n || tsb-1..n) + tsn-1
   endif
endfunction srar

Exceptions:

Reserved Instruction Exception, MSA Disabled Exception.