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1 ;=============================================================================
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2 ;
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3 ; File math.inc combined next generation V3.04.3
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4 ;
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5 ;
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6 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
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7 ;=============================================================================
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8 ; HISTORY
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9 ; 2011-08-03 : [mH] moving from OSTC code
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10
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11 extern convert_time ; convert hi:lo in minutes to hours (up:hi) and minutes (lo)
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12 ; also usable for conversion of seconds to minutes and seconds
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13 ; trashes xA, xB, xC
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14
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15 extern div16 ; divA:2 = divA:2 / 2^WREG
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16 ; trashes WREG
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17
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18 extern mult16 ; divA:2 = divA:2 * 2^WREG
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19 ; trashes WREG
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20
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21 extern addU16 ; sub_c:2 = sub_a:2 + sub_b:2 with USIGNED values
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22 ; trashes WREG
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23
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24 extern sub16 ; sub_c:2 = sub_a:2 - sub_b:2 with SIGNED values
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25 ; sets neg_flag if result is < 0
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26 ; trashes WREG
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27
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28 extern subU16 ; sub_c:2 = sub_a:2 - sub_b:2 with UNSIGNED values
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29 ; sets neg_flag if result is < 0
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30 ; trashes WREG
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31
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32 extern cmpU16 ; trashed = sub_a:2 - sub_b:2 with UNSIGNED values
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33 ; sets neg_flag if result is < 0, but does not store result itself
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34 ; trashes WREG
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35
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36 extern mult16x16 ; xC:4 = xA:2 * xB:2 with UNSIGNED values
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37 ; trashes PRODL, PRODH, WREG
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38
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39 extern div16x16 ; xC:2 = xA:2 / xB:2 with xA as remainder
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40 ; trashes xB, WREG
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41
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42 extern div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder
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43 ; trashes WREG
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44
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45 extern isr_shift_C31 ; 24 bit shift, repeated WREG times,
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46 ; dedicated to a specific usage
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47
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48 extern isr_unsigned_mult16x16 ; isr_xC = isr_xA * _isr_xB with UNSIGNED values
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49 ; trashes PRODL, PRODH, WREG
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50
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51 extern isr_signed_mult16x16 ; isr_xC = isr_xA * _isr_xB with SIGNED values
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52 ; trashes PRODL, PRODH, WREG
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