Encoding:

Format:

FEXUPL.df 

FEXUPL.W wd,ws

FEXUPL.D wd,ws

Purpose:

Vector Floating-Point Up-Convert Interchange Format Left

Vector left elements conversion to wider interchange format.

Description:

wd[i] = up_convert(left_half(ws)[i])

The left half floating-point elements in vector ws are up-converted to a larger interchange format, i.e. from 16-bit to

32-bit, or from 32-bit to 64-bit. The result is written to vector wd.

The format up-conversion operation is defined by the IEEE Standard for Floating-Point Arithmetic 754^TM-2008.

16-bit floating-point inputs are not affected by the flush-to-zero bit FS in MSA Control and Status Register MSACSR.

The operands are values in floating-point data format half the size of df. The results are floating-point values in 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:

FEXUPL.W
   for i in 0 .. WRLEN/32-1
      f = UpConvertFP(WR[ws]16i+15+WRLEN/2..16i+WRLEN/2, 16)
      WR[wd]32i+31..32i = f
   endfor
FEXUPL.D
   for i in 0 .. WRLEN/64-1
      f = UpConvertFP(WR[ws]32i+31+WRLEN/2..32i+WRLEN/2, 32)
      WR[wd]64i+63..64i = f
   endfor
function UpConvertFP(tt, n)
   /* Implementation defined format up-conversion. */
endfunction UpConvertFP

Exceptions:

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