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Last change
on this file since f7c91fc was 4f508e6, checked in by Thomas Lopatic <thomas@…>, 8 years ago |
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Converted assembly language files.
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-
Property mode
set to
100644
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File size:
1.2 KB
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| Rev | Line | |
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| [4f508e6] | 1 | | ------------------------------------------------------------------------------
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| 2 | | ldiv.s -- long division
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| 3 | | Version 1 -- 1988-01-22
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| 4 | | ------------------------------------------------------------------------------
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| [f40a309] | 5 | .text
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| [4f508e6] | 6 |
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| [f40a309] | 7 | .xdef _ldiv
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| 8 | .xdef ldiv
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| [4f508e6] | 9 |
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| [f40a309] | 10 | .xdef _ldivr
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| [4f508e6] | 11 |
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| 12 | ARG1 = 8
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| 13 | ARG2 = 12
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| 14 |
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| [f40a309] | 15 | _ldiv:
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| 16 | ldiv: link a6,#-2
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| 17 | movem.l d2-d7,-(a7)
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| 18 | clr.w d3
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| 19 | clr.l d5
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| 20 | move.l ARG1(a6),d7
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| 21 | move.l ARG2(a6),d6
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| 22 | bne ldiv1
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| [4f508e6] | 23 |
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| 24 | move.l #0x80000000,_ldivr
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| 25 | move.l #0x80000000,d0
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| [f40a309] | 26 | divs #0,d0
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| 27 | bra ldiv11
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| [4f508e6] | 28 |
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| [f40a309] | 29 | ldiv1: bge ldiv2
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| [4f508e6] | 30 |
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| [f40a309] | 31 | neg.l d6
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| 32 | addq.w #1,d3
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| [4f508e6] | 33 |
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| [f40a309] | 34 | ldiv2: tst.l d7
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| 35 | bge ldiv3
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| [4f508e6] | 36 |
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| [f40a309] | 37 | neg.l d7
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| 38 | addq.w #1,d3
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| [4f508e6] | 39 |
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| [f40a309] | 40 | ldiv3: cmp.l d7,d6
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| 41 | bgt ldiv9
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| [4f508e6] | 42 |
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| [f40a309] | 43 | bne ldiv4
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| [4f508e6] | 44 |
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| [f40a309] | 45 | moveq.l #1,d5
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| 46 | clr.l d7
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| 47 | bra ldiv9
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| [4f508e6] | 48 |
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| 49 | ldiv4: cmp.l #0x10000,d7
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| [f40a309] | 50 | bge ldiv5
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| [4f508e6] | 51 |
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| [f40a309] | 52 | divu d6,d7
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| 53 | move.w d7,d5
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| 54 | swap d7
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| 55 | ext.l d7
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| 56 | bra ldiv9
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| [4f508e6] | 57 |
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| [f40a309] | 58 | ldiv5: moveq.l #1,d4
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| [4f508e6] | 59 |
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| [f40a309] | 60 | ldiv6: cmp.l d6,d7
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| 61 | bcs ldiv7
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| [4f508e6] | 62 |
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| [f40a309] | 63 | asl.l #1,d6
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| 64 | asl.l #1,d7
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| 65 | bra ldiv6
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| [4f508e6] | 66 |
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| [f40a309] | 67 | ldiv7: tst.l d4
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| 68 | beq ldiv9
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| [4f508e6] | 69 |
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| [f40a309] | 70 | cmp.l d6,d7
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| 71 | bcs ldiv8
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| [4f508e6] | 72 |
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| [f40a309] | 73 | or.l d4,d5
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| 74 | sub.l d6,d7
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| [4f508e6] | 75 |
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| [f40a309] | 76 | ldiv8: lsr.l #1,d4
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| 77 | lsr.l #1,d6
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| 78 | bra ldiv7
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| [4f508e6] | 79 |
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| [f40a309] | 80 | ldiv9: cmp.w #1,d3
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| 81 | bne ldiv10
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| [4f508e6] | 82 |
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| [f40a309] | 83 | neg.l d7
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| 84 | move.l d7,_ldivr
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| 85 | move.l d5,d0
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| 86 | neg.l d0
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| 87 | bra ldiv11
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| [4f508e6] | 88 |
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| [f40a309] | 89 | ldiv10: move.l d7,_ldivr
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| 90 | move.l d5,d0
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| [4f508e6] | 91 |
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| [f40a309] | 92 | ldiv11: tst.l (a7)+
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| 93 | movem.l (a7)+,d3-d7
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| 94 | unlk a6
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| 95 | rts
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| [4f508e6] | 96 |
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| [f40a309] | 97 | .bss
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| [4f508e6] | 98 |
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| [f40a309] | 99 | _ldivr: .ds.l 1
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| [4f508e6] | 100 |
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| [f40a309] | 101 | .end
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