Encoding:

Format:

FEXP2.df 

FEXP2.W wd,ws,wt

FEXP2.D wd,ws,wt

Purpose:

Vector Floating-Point Base 2 Exponentiation

Vector floating-point base 2 exponentiation.

Description:

wd[i] = ws[i] * 2

wt[i]

The floating-point elements in vector ws are scaled, i.e. multiplied, by 2 to the power of integer elements in vector wt.

The result is written to vector wd.

The operation is the homogeneous scaleB() as defined by the IEEE Standard for Floating-Point Arithmetic 754^TM2008.

The ws operands and wd results are values in floating-point data format df. The wt operands are values in integer data format df.

Restrictions:

Data-dependent exceptions are poss ible as s pecified by the I EEE Standard for Floating-Point Arithmetic 754^TM2008.

Operation:

FEXP2.W
   for i in 0 .. WRLEN/32-1
      WR[wd]32i+31..32i = Exp2FP(WR[ws]32i+31..32i, WR[wt]32i+31..32i)
   endfor
FEXP2.D
   for i in 0 .. WRLEN/64-1
      WR[wd]64i+63..64i = Exp2FP(WR[ws]64i+63..64i, WR[wt]64i+63..64i)
   endfor
function Exp2FP(tt, ts, n)
   /* Implementation defined tt * 2ts operation. */
endfunction Exp2FP

Exceptions:

Reserved Instruction Exception, MSA Disabled Exception, MSA Floating Point Exception.