== code # instruction effective address register displacement immediate # . op subop mod rm32 base index scale r32 # . 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 # (re)compute the bounds of the next word or string literal in the line # return empty string on reaching end of file next-word-or-string: # line: (addr stream byte), out: (addr slice) # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax 51/push-ecx 56/push-esi 57/push-edi # esi = line 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi # edi = out 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 7/r32/edi 0xc/disp8 . # copy *(ebp+12) to edi # skip-chars-matching(line, ' ') # . . push args 68/push 0x20/imm32/space ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call skip-chars-matching/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp $next-word-or-string:check0: # if (line->read >= line->write) clear out and return # . eax = line->read 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # copy *(esi+4) to eax # . if (eax < line->write) goto next check 3b/compare 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # compare eax with *esi 7c/jump-if-< $next-word-or-string:check-for-comment/disp8 # . return out c7 0/subop/copy 0/mod/direct 7/rm32/edi . . . . . 0/imm32 # copy to *edi c7 0/subop/copy 1/mod/*+disp8 7/rm32/edi . . . . 4/disp8 0/imm32 # copy to *(edi+4) eb/jump $next-word-or-string:end/disp8 $next-word-or-string:check-for-comment: # out->start = &line->data[line->read] 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 4/disp8 . # copy *(esi+4) to ecx 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/eax 0xc/disp8 . # copy esi+ecx+12 to eax 89/copy 0/mod/indirect 7/rm32/edi . . . 0/r32/eax . . # copy eax to *edi # if (line->data[line->read] != '#') goto next check # . eax = line->data[line->read] 31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/AL 0xc/disp8 . # copy byte at *(esi+ecx+12) to AL # . compare 3d/compare-eax-and 0x23/imm32/pound 75/jump-if-!= $next-word-or-string:check-for-string-literal/disp8 $next-word-or-string:comment: # out->end = &line->data[line->write] 8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax 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 89/copy 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy eax to *(edi+4) # line->read = line->write # skip rest of line 8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax 89/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # copy eax to *(esi+4) # return eb/jump $next-word-or-string:end/disp8 $next-word-or-string:check-for-string-literal: # if (line->data[line->read] != '"') goto next check # . eax = line->data[line->read] 31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/AL 0xc/disp8 . # copy byte at *(esi+ecx+12) to AL # . compare 3d/compare-eax-and 0x22/imm32/dquote 75/jump-if-!= $next-word-or-string:regular-word/disp8 $next-word-or-string:string-literal: # skip-string(line) # . . push args 56/push-esi # . . call e8/call skip-string/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # fall through $next-word-or-string:regular-word: # skip-chars-not-matching-whitespace(line) # including trailing newline # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call skip-chars-not-matching-whitespace/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # out->end = &line->data[line->read] 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 4/disp8 . # copy *(esi+4) to ecx 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/eax 0xc/disp8 . # copy esi+ecx+12 to eax 89/copy 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy eax to *(edi+4) $next-word-or-string:end: # . restore registers 5f/pop-to-edi 5e/pop-to-esi 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-next-word-or-string: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # setup # . clear-stream(_test-input-stream) # . . push args 68/push _test-input-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # var slice/ecx: slice 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # write(_test-input-stream, " ab") # . . push args 68/push " ab"/imm32 68/push _test-input-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # next-word-or-string(_test-input-stream, slice) # . . push args 51/push-ecx 68/push _test-input-stream/imm32 # . . call e8/call next-word-or-string/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(_test-input-stream->read, 4, msg) # . . push args 68/push "F - test-next-word-or-string/updates-stream-read-correctly"/imm32 68/push 4/imm32 b8/copy-to-eax _test-input-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/eax . . . . 4/disp8 . # push *(eax+4) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(slice->start - _test-input-stream->data, 2, msg) # . check-ints-equal(slice->start - _test-input-stream, 14, msg) # . . push args 68/push "F - test-next-word-or-string: start"/imm32 68/push 0xe/imm32 # . . push slice->start - _test-input-stream 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(slice->end - _test-input-stream->data, 4, msg) # . check-ints-equal(slice->end - _test-input-stream, 16, msg) # . . push args 68/push "F - test-next-word-or-string: end"/imm32 68/push 0x10/imm32 # . . push slice->end - _test-input-stream 8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-next-word-or-string-returns-whole-comment: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # setup # . clear-stream(_test-input-stream) # . . push args 68/push _test-input-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # var slice/ecx: slice 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # write(_test-input-stream, " # a") # . . push args 68/push " # a"/imm32 68/push _test-input-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # next-word-or-string(_test-input-stream, slice) # . . push args 51/push-ecx 68/push _test-input-stream/imm32 # . . call e8/call next-word-or-string/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(_test-input-stream->read, 5, msg) # . . push args 68/push "F - test-next-word-or-string-returns-whole-comment/updates-stream-read-correctly"/imm32 68/push 5/imm32 b8/copy-to-eax _test-input-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/eax . . . . 4/disp8 . # push *(eax+4) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(slice->start - _test-input-stream->data, 2, msg) # . check-ints-equal(slice->start - _test-input-stream, 14, msg) # . . push args 68/push "F - test-next-word-or-string-returns-whole-comment: start"/imm32 68/push 0xe/imm32 # . . push slice->start - _test-input-stream 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(slice->end - _test-input-stream->data, 5, msg) # . check-ints-equal(slice->end - _test-input-stream, 17, msg) # . . push args 68/push "F - test-next-word-or-string-returns-whole-comment: end"/imm32 68/push 0x11/imm32 # . . push slice->end - _test-input-stream 8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-next-word-or-string-returns-empty-slice-on-eof: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # setup # . clear-stream(_test-input-stream) # . . push args 68/push _test-input-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # var slice/ecx: slice 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # write nothing to _test-input-stream # next-word-or-string(_test-input-stream, slice) # . . push args 51/push-ecx 68/push _test-input-stream/imm32 # . . call e8/call next-word-or-string/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(slice->end - slice->start, 0, msg) # . . push args 68/push "F - test-next-word-or-string-returns-empty-string-on-eof"/imm32 68/push 0/imm32 # . . push slice->end - slice->start 8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax 2b/subtract 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # subtract *ecx from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-next-word-or-string-returns-string-literal: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # setup # . clear-stream(_test-input-stream) # . . push args 68/push _test-input-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # var slice/ecx: slice 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # write(_test-input-stream, " \"a b\"/imm32 ") # . . push args 68/push " \"a b\"/imm32 "/imm32 68/push _test-input-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # next-word-or-string(_test-input-stream, slice) # . . push args 51/push-ecx 68/push _test-input-stream/imm32 # . . call e8/call next-word-or-string/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(slice->start - _test-input-stream->data, 1, msg) # . check-ints-equal(slice->start - _test-input-stream, 13, msg) # . . push args 68/push "F - test-next-word-or-string-returns-string-literal: start"/imm32 68/push 0xd/imm32 # . . push slice->start - _test-input-stream 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(slice->end - _test-input-stream->data, 12, msg) # . check-ints-equal(slice->end - _test-input-stream, 24, msg) # . . push args 68/push "F - test-next-word-or-string-returns-string-literal: end"/imm32 68/push 0x18/imm32 # . . push slice->end - _test-input-stream 8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-next-word-or-string-returns-string-with-escapes: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # setup # . clear-stream(_test-input-stream) # . . push args 68/push _test-input-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # var slice/ecx: slice 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # write(_test-input-stream, " \"a\\\"b\"/x") # . . push args 68/push " \"a\\\"b\"/x"/imm32 68/push _test-input-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # next-word-or-string(_test-input-stream, slice) # . . push args 51/push-ecx 68/push _test-input-stream/imm32 # . . call e8/call next-word-or-string/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(slice->start - _test-input-stream->data, 1, msg) # . check-ints-equal(slice->start - _test-input-stream, 13, msg) # . . push args 68/push "F - test-next-word-or-string-returns-string-with-escapes: start"/imm32 68/push 0xd/imm32 # . . push slice->start - _test-input-stream 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(slice->end - _test-input-stream->data, 9, msg) # . check-ints-equal(slice->end - _test-input-stream, 21, msg) # . . push args 68/push "F - test-next-word-or-string-returns-string-with-escapes: end"/imm32 68/push 0x15/imm32 # . . push slice->end - _test-input-stream 8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax 81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # . . vim:nowrap:textwidth=0