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annotate src/math.inc @ 639:0ff82370991d

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author heinrichsweikamp
date Mon, 10 Aug 2020 15:34:38 +0200
parents 4050675965ea
children 7d8a4c60ec1a
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1 ;=============================================================================
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2 ;
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3 ; File math.inc * combined next generation V3.09.4k
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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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12 ;-----------------------------------------------------------------------------
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13 ; SHIFT-RIGHT with UNSIGNED values
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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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18
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19 ;-----------------------------------------------------------------------------
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20 ; SHIFT-LEFT with UNSIGNED values
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21 ;
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22 extern mult16 ; divA:2 = divA:2 * 2^WREG
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23 ; trashes WREG
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26 ;-----------------------------------------------------------------------------
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27 ; ADDITION with UNSIGNED values
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28 ;
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29 extern addU16 ; sub_c:2 = sub_a:2 + sub_b:2
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30 ; trashes WREG
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32
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33 ;-----------------------------------------------------------------------------
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34 ; SUBTRACTION with SIGNED values
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35 ;
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36 extern sub16 ; sub_c:2 = sub_a:2 - sub_b:2
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37 ; sets neg_flag if result is < 0
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38 ; trashes WREG
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40
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41 ;-----------------------------------------------------------------------------
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42 ; SUBTRACTION with UNSIGNED values
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43 ;
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44 extern subU16 ; sub_c:2 = sub_a:2 - sub_b:2
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45 ; sets neg_flag if result is < 0
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46 ; trashes WREG
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47
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48
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49 ;-----------------------------------------------------------------------------
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50 ; COMPARE with UNSIGNED values
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51 ;
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52 extern cmpU16 ; trashed = sub_a:2 - sub_b:2
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53 ; sets neg_flag if result is < 0, but does not store result itself
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54 ; trashes WREG
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56
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57 ;-----------------------------------------------------------------------------
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58 ; MULTIPLICATION with UNSIGNED values
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59 ;
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60 extern mult16x16 ; xC:4 = xA:2 * xB:2
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61 ; trashes PRODL, PRODH, WREG
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64 ;-----------------------------------------------------------------------------
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65 ; DIVISION with UNSIGNED values
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66 ;
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67 extern div16x16 ; xC:2 = xA:2 / xB:2 with xA as remainder
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68 ; trashes xB, WREG
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71 ;-----------------------------------------------------------------------------
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72 ; DIVISION with UNSIGNED values
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73 ;
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74 extern div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder
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75 ; trashes WREG
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78 ;-----------------------------------------------------------------------------
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79 ; Math Functions specific for Use by ISR
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80 ;-----------------------------------------------------------------------------
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81
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82 ;-----------------------------------------------------------------------------
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83 ; 24 bit shift, repeated WREG times, dedicated to a specific usage
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84 ;
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85 extern isr_shift_C31
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86
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87
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88 ;-----------------------------------------------------------------------------
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89 ; MULTIPLICATION with UNSIGNED values
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90 ;
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91 extern isr_unsigned_mult16x16 ; isr_xC = isr_xA * isr_xB
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92 ; trashes PRODL, PRODH, WREG
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93
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95 ;-----------------------------------------------------------------------------
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96 ; MULTIPLICATION with SIGNED values
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97 ;
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98 extern isr_signed_mult16x16 ; isr_xC = isr_xA * isr_xB
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99 ; trashes PRODL, PRODH, WREG
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100
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101 ;-----------------------------------------------------------------------------