Encoding:

MSA

011110

001

df

wt

ws

wd

3R

010010

6

3

2

5

5

5

6

Format: 

MADDV.df

Vector Multiply and Add

MADDV.B wd,ws,wt

MSA

Vector Multiply and Add

MADDV.H wd,ws,wt

MSA

Vector Multiply and Add

MADDV.W wd,ws,wt

MSA

Vector Multiply and Add

MADDV.D wd,ws,wt

MSA

Vector Multiply and Add

Purpose:

Vector Multiply and Add

Vector multiply and add.

Description: 

wd[i] = wd[i] + ws[i] * wt[i]

The integer elements in vector wt are multiplied by integer elements in vector ws and added to the integer elements in vector wd. The most significant half of the multiplication result is discarded.

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

Restrictions:

No data-dependent exceptions are possible.

Operation: 

MADDV.B
   for i in 0 .. WRLEN/8-1
      WR[wd]8i+7..8i = 
             WR[wd]8i+7..8i + WR[ws]8i+7..8i * WR[wt]8i+7..8i
   endfor
MADDV.H
   for i in 0 .. WRLEN/16-1
      WR[wd]16i+15..16i =
             WR[wd]16i+15..16i + WR[ws]16i+15..16i * WR[wt]16i+15..16i
   endfor
MADDV.W
   for i in 0 .. WRLEN/32-1
      WR[wd]32i+31..32i =
             WR[wd]32i+31..32i + WR[ws]32i+31..32i * WR[wt]32i+31..32i
   endfor
MADDV.D
   for i in 0 .. WRLEN/64-1
      WR[wd]64i+63..64i =
             WR[wd]64i+63..64i + WR[ws]64i+63..64i * WR[wt]64i+63..64i
   endfor

Exceptions:

Reserved Instruction Exception, MSA Disabled Exception.