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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Mu - 113write-stream.subx</title> <meta name="Generator" content="Vim/8.1"> <meta name="plugin-version" content="vim8.1_v1"> <meta name="syntax" content="none"> <meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> <meta name="colorscheme" content="minimal-dark"> <style type="text/css">  </style> <script type='text/javascript'>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/main/113write-stream.subx'>https://github.com/akkartik/mu/blob/main/113write-stream.subx</a> <pre id='vimCodeElement'> 1 # write-stream: like write, but write streams rather than strings 2 3 == code 4 # instruction effective address register displacement immediate 5 # . op subop mod rm32 base index scale r32 6 # . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes 7 8 write-stream: # f: (addr stream byte), s: (addr stream byte) 9 # . prologue 10 55/push-ebp 11 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp 12 # . save registers 13 50/push-eax 14 56/push-esi 15 57/push-edi 16 # edi = f 17 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 7/r32/edi 8/disp8 . # copy *(ebp+8) to edi 18 # esi = s 19 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 6/r32/esi 0xc/disp8 . # copy *(ebp+12) to esi 20 # eax = _append-4(&f->data[f->write], &f->data[f->size], &s->data[s->read], &s->data[s->write]) 21 # . . push &s->data[s->write] 22 8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax 23 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 0/index/eax . 0/r32/eax 0xc/disp8 . # copy esi+eax+12 to eax 24 50/push-eax 25 # . . push &s->data[s->read] 26 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # copy *(esi+4) to eax 27 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 0/index/eax . 0/r32/eax 0xc/disp8 . # copy esi+eax+12 to eax 28 50/push-eax 29 # . . push &f->data[f->size] 30 8b/copy 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 8/disp8 . # copy *(edi+8) to eax 31 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/edi 0/index/eax . 0/r32/eax 0xc/disp8 . # copy edi+eax+12 to eax 32 50/push-eax 33 # . . push &f->data[f->write] 34 8b/copy 0/mod/indirect 7/rm32/edi . . . 0/r32/eax . . # copy *edi to eax 35 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/edi 0/index/eax . 0/r32/eax 0xc/disp8 . # copy edi+eax+12 to eax 36 50/push-eax 37 # . . call 38 e8/call <a href='108write.subx.html#L171'>_append-4</a>/disp32 39 # . . discard args 40 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp 41 # f->write += eax 42 01/add 0/mod/indirect 7/rm32/edi . . . 0/r32/eax . . # add eax to *edi 43 # s->read += eax 44 01/add 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # add eax to *(esi+4) 45 $write-stream:end: 46 # . restore registers 47 5f/pop-to-edi 48 5e/pop-to-esi 49 58/pop-to-eax 50 # . epilogue 51 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 52 5d/pop-to-ebp 53 c3/return 54 55 test-write-stream-single: 56 # setup 57 # . clear-stream(_test-stream) 58 # . . push args 59 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 60 # . . call 61 e8/call <a href='106stream.subx.html#L20'>clear-stream</a>/disp32 62 # . . discard args 63 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 64 # . clear-stream(_test-stream2) 65 # . . push args 66 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 67 # . . call 68 e8/call <a href='106stream.subx.html#L20'>clear-stream</a>/disp32 69 # . . discard args 70 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 71 # . write(_test-stream2, "Ab") 72 # . . push args 73 68/push "Ab"/imm32 74 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 75 # . . call 76 e8/call <a href='108write.subx.html#L11'>write</a>/disp32 77 # . . discard args 78 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 79 # write-stream(_test-stream, _test-stream2) 80 # . . push args 81 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 82 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 83 # . . call 84 e8/call <a href='113write-stream.subx.html#L8'>write-stream</a>/disp32 85 # . . discard args 86 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 87 # check-stream-equal(_test-stream, "Ab", msg) 88 # . . push args 89 68/push "F - test-write-stream-single"/imm32 90 68/push "Ab"/imm32 91 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 92 # . . call 93 e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 94 # . . discard args 95 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 96 # . end 97 c3/return 98 99 test-write-stream-appends: 100 # setup 101 # . clear-stream(_test-stream) 102 # . . push args 103 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 104 # . . call 105 e8/call <a href='106stream.subx.html#L20'>clear-stream</a>/disp32 106 # . . discard args 107 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 108 # . clear-stream(_test-stream2) 109 # . . push args 110 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 111 # . . call 112 e8/call <a href='106stream.subx.html#L20'>clear-stream</a>/disp32 113 # . . discard args 114 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 115 # . write(_test-stream2, "C") 116 # . . push args 117 68/push "C"/imm32 118 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 119 # . . call 120 e8/call <a href='108write.subx.html#L11'>write</a>/disp32 121 # . . discard args 122 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 123 # first write 124 # . write-stream(_test-stream, _test-stream2) 125 # . . push args 126 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 127 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 128 # . . call 129 e8/call <a href='113write-stream.subx.html#L8'>write-stream</a>/disp32 130 # . . discard args 131 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 132 # second write 133 # . write(_test-stream2, "D") 134 # . . push args 135 68/push "D"/imm32 136 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 137 # . . call 138 e8/call <a href='108write.subx.html#L11'>write</a>/disp32 139 # . . discard args 140 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 141 # . write-stream(_test-stream, _test-stream2) 142 # . . push args 143 68/push <a href='113write-stream.subx.html#L163'>_test-stream2</a>/imm32 144 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 145 # . . call 146 e8/call <a href='113write-stream.subx.html#L8'>write-stream</a>/disp32 147 # . . discard args 148 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 149 # check-stream-equal(_test-stream, "CD", msg) 150 # . . push args 151 68/push "F - test-write-stream-appends"/imm32 152 68/push "CD"/imm32 153 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 154 # . . call 155 e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 156 # . . discard args 157 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 158 # . end 159 c3/return 160 161 == data 162 163 _test-stream2: # (stream byte) 164 # current write index 165 4/imm32 166 # current read index 167 1/imm32 168 # size 169 8/imm32 170 # data 171 41/A 42/B 43/C 44/D 00 00 00 00 # 8 bytes 172 173 # . . vim:nowrap:textwidth=0 </pre> </body> </html>


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