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How to drop unuse code?

chaitana kung

I wrote a program compress time to long. But some output give to much ( outout asm ). How can I reduce unuse code. see output below.

my source.

extern unsigned char convBcd2Hex(unsigned char c);

void convert( void )
{
  unsigned long dwTmp;

                      dwTmp =         convBcd2Hex( sClock[YEAR]  ); // 4 year
  _lrol_( dwTmp, 4 ); dwTmp = dwTmp | convBcd2Hex( sClock[MONTH] ); // 4 month
  _lrol_( dwTmp, 5 ); dwTmp = dwTmp | convBcd2Hex( sClock[DAY]   ); // 5 day
  _lrol_( dwTmp, 5 ); dwTmp = dwTmp | convBcd2Hex( sClock[HOUR]  ); // 5 hour
  _lrol_( dwTmp, 6 ); dwTmp = dwTmp | convBcd2Hex( sClock[MINUTE]); // 6 minute
  _lrol_( dwTmp, 6 ); dwTmp = dwTmp | convBcd2Hex( sClock[SECOND]); // 6 second

}
my output list.

                                           ; SOURCE LINE # 140
001F AF00        E     MOV     R7,sClock+06H
0021 120000      R     LCALL   _convBcd2Hex
0024 E4                CLR     A
0025 8F00        R     MOV     dwTmp+03H,R7
0027 F500        R     MOV     dwTmp+02H,A
0029 F500        R     MOV     dwTmp+01H,A
002B F500        R     MOV     dwTmp,A
                                           ; SOURCE LINE # 141
002D AE00        R     MOV     R6,dwTmp+02H
002F AD00        R     MOV     R5,dwTmp+01H
0031 AC00        R     MOV     R4,dwTmp
0033 7804              MOV     R0,#04H
0035 120000      E     LCALL   ?C?LROL
0038 AF00        E     MOV     R7,sClock+05H
003A 120000      R     LCALL   _convBcd2Hex
003D E4                CLR     A
003E EF                MOV     A,R7
003F 4500        R     ORL     A,dwTmp+03H
0041 F500        R     MOV     dwTmp+03H,A
0043 E500        R     MOV     A,dwTmp+02H  +
0045 F500        R     MOV     dwTmp+02H,A  |
0047 E500        R     MOV     A,dwTmp+01H  |-- How can I reduct this code?
0049 F500        R     MOV     dwTmp+01H,A  |
004B E500        R     MOV     A,dwTmp      |
004D F500        R     MOV     dwTmp,A      +
                                           ; SOURCE LINE # 142
004F AF00        R     MOV     R7,dwTmp+03H
0051 AE00        R     MOV     R6,dwTmp+02H
0053 AD00        R     MOV     R5,dwTmp+01H
0055 FC                MOV     R4,A
0056 7805              MOV     R0,#05H
0058 120000      E     LCALL   ?C?LROL
005B AF00        E     MOV     R7,sClock+04H
005D 120000      R     LCALL   _convBcd2Hex
0060 E4                CLR     A
0061 EF                MOV     A,R7
0062 4500        R     ORL     A,dwTmp+03H
0064 F500        R     MOV     dwTmp+03H,A
0066 E500        R     MOV     A,dwTmp+02H  +
0068 F500        R     MOV     dwTmp+02H,A  |
006A E500        R     MOV     A,dwTmp+01H  |-- How can I reduct this code? 
006C F500        R     MOV     dwTmp+01H,A  |
006E E500        R     MOV     A,dwTmp      |
0070 F500        R     MOV     dwTmp,A      +

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