| 26 |
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 27 |
POSSIBILITY OF SUCH DAMAGE. */ |
POSSIBILITY OF SUCH DAMAGE. */ |
| 28 |
|
|
| 29 |
|
/* $Id$ */ |
| 30 |
|
|
| 31 |
/* |
/* |
| 32 |
utoa.S |
utoa.S |
| 33 |
|
|
| 68 |
mov r_lstr_lo, ZL ; save &string |
mov r_lstr_lo, ZL ; save &string |
| 69 |
mov r_lstr_hi, ZH |
mov r_lstr_hi, ZH |
| 70 |
cpi r_radix, 2 ; no radix < 2 |
cpi r_radix, 2 ; no radix < 2 |
| 71 |
brlt terminate |
brlt 99f |
| 72 |
cpi r_radix, 37 ; no radix > 36 |
cpi r_radix, 37 ; no radix > 36 |
| 73 |
brge terminate |
brge 99f |
| 74 |
divide_loop: |
1: |
| 75 |
mov r22, r_radix ; radix |
mov r22, r_radix ; radix |
| 76 |
clr r23 ; dividend in r25:r24, divisor in r23:r22 |
clr r23 ; dividend in r25:r24, divisor in r23:r22 |
| 77 |
XCALL _U(__udivmodhi4); quotient in r23:r22, remainder in r25:r24 |
XCALL _U(__udivmodhi4); quotient in r23:r22, remainder in r25:r24 |
| 79 |
; call-used but preserved: r18,r19,r20,r30,r31 |
; call-used but preserved: r18,r19,r20,r30,r31 |
| 80 |
subi r24, 0xd0 ; + '0' |
subi r24, 0xd0 ; + '0' |
| 81 |
cpi r24, 0x3a ; > '9' ? |
cpi r24, 0x3a ; > '9' ? |
| 82 |
brlt L_10 |
brlt 10f |
| 83 |
subi r24, 0xd9 ; + 'a' - 10 - '0' |
subi r24, 0xd9 ; + 'a' - 10 - '0' |
| 84 |
L_10: |
10: |
| 85 |
st Z+, r24 ; write char to string in reverse order! |
st Z+, r24 ; write char to string in reverse order! |
| 86 |
mov r_val_lo,r22 ; quotient -> dividend |
mov r_val_lo,r22 ; quotient -> dividend |
| 87 |
mov r_val_hi,r23 |
mov r_val_hi,r23 |
| 88 |
sbiw r_val_lo,0 ; value == 0 ? |
sbiw r_val_lo,0 ; value == 0 ? |
| 89 |
brne divide_loop |
brne 1b |
| 90 |
terminate: |
99: |
| 91 |
mov r_val_hi, r_lstr_hi ; restore &string as return value |
mov r_val_hi, r_lstr_hi ; restore &string as return value |
| 92 |
mov r_val_lo, r_lstr_lo |
mov r_val_lo, r_lstr_lo |
| 93 |
st Z, __zero_reg__ ; terminate string |
st Z, __zero_reg__ ; terminate string |