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author | Kartik Agaram <vc@akkartik.com> | 2019-02-03 23:29:46 -0800 |
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committer | Kartik Agaram <vc@akkartik.com> | 2019-02-03 23:29:46 -0800 |
commit | 51b4f888dd20653bb218f06e1221a7007446fcd5 (patch) | |
tree | 7458e3eebfc7e5df9903219603d5f8cda87f74af /subx/073next-token.subx | |
parent | 03c6f1d3858ff0fdb6af6ce4b61bea51f16b33be (diff) | |
download | mu-51b4f888dd20653bb218f06e1221a7007446fcd5.tar.gz |
4950
Diffstat (limited to 'subx/073next-token.subx')
-rw-r--r-- | subx/073next-token.subx | 849 |
1 files changed, 849 insertions, 0 deletions
diff --git a/subx/073next-token.subx b/subx/073next-token.subx new file mode 100644 index 00000000..41dd94f3 --- /dev/null +++ b/subx/073next-token.subx @@ -0,0 +1,849 @@ +== 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 + +# main: +#? e8/call test-next-token-from-slice/disp32 + e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'. + # syscall(exit, Num-test-failures) + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX + b8/copy-to-EAX 1/imm32/exit + cd/syscall 0x80/imm8 + +# extract the next run of characters that are different from a given 'delimiter' (skipping multiple delimiters if necessary) +# on eof return an empty interval +next-token: # in : (address stream), delimiter : byte, out : (address slice) + # . prolog + 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 = in + 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 0x10/disp8 . # copy *(EBP+16) to EDI + # skip-chars-matching(in, delimiter) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12) + 56/push-ESI + # . . call + e8/call skip-chars-matching/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # out->start = &in->data[in->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 + # skip-chars-not-matching(in, delimiter) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12) + 56/push-ESI + # . . call + e8/call skip-chars-not-matching/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # out->end = &in->data[in->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) + # . restore registers + 5f/pop-to-EDI + 5e/pop-to-ESI + 59/pop-to-ECX + 58/pop-to-EAX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-next-token: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-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 = {0, 0} + 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-stream, " ab") + # . . push args + 68/push " ab"/imm32 + 68/push _test-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-token(_test-stream, 0x20/space, slice) + # . . push args + 51/push-ECX + 68/push 0x20/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call next-token/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # check-ints-equal(slice->start - _test-stream->data, 2, msg) + # . check-ints-equal(slice->start - _test-stream, 14, msg) + # . . push args + 68/push "F - test-next-token: start"/imm32 + 68/push 0xe/imm32 + # . . push slice->start - _test-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-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-stream->data, 4, msg) + # . check-ints-equal(slice->end - _test-stream, 16, msg) + # . . push args + 68/push "F - test-next-token: end"/imm32 + 68/push 0x10/imm32 + # . . push slice->end - _test-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-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 + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-next-token-eof: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-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 = {0, 0} + 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-stream + # next-token(_test-stream, 0x20/space, slice) + # . . push args + 51/push-ECX + 68/push 0x20/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call next-token/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # check-ints-equal(slice->end, slice->start, msg) + # . . push args + 68/push "F - test-next-token-eof"/imm32 + ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4) + ff 6/subop/push 0/mod/indirect 1/rm32/ECX . . . . . . # push *ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +# extract the next run of characters that are different from a given 'delimiter' (skipping multiple delimiters if necessary) +# on eof return an empty interval +next-token-from-slice: # start : (address byte), end : (address byte), delimiter : byte, out : (address slice) -> <void> + # . prolog + 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 + 52/push-EDX + 57/push-EDI + # ECX = end + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 0xc/disp8 . # copy *(EBP+12) to ECX + # EDX = delimiter + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0x10/disp8 . # copy *(EBP+16) to EDX + # EDI = out + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 0x14/disp8 . # copy *(EBP+20) to EDI + # EAX = skip-chars-matching-in-slice(start, end, delimiter) + # . . push args + 52/push-EDX + 51/push-ECX + ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) + # . . call + e8/call skip-chars-matching-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # out->start = EAX + 89/copy 0/mod/indirect 7/rm32/EDI . . . 0/r32/EAX . . # copy EAX to *EDI + # EAX = skip-chars-not-matching-in-slice(EAX, end, delimiter) + # . . push args + 52/push-EDX + 51/push-ECX + 50/push-EAX + # . . call + e8/call skip-chars-not-matching-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # out->end = EAX + 89/copy 1/mod/*+disp8 7/rm32/EDI . . . 0/r32/EAX 4/disp8 . # copy EAX to *(EDI+4) + # . restore registers + 5f/pop-to-EDI + 5a/pop-to-EDX + 59/pop-to-ECX + 58/pop-to-EAX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-next-token-from-slice: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = " ab" + b8/copy-to-EAX " ab"/imm32 + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX + 05/add-to-EAX 4/imm32 + # var out/EDI : (address slice) = {0, 0} + 68/push 0/imm32/end + 68/push 0/imm32/start + 89/copy 3/mod/direct 7/rm32/EDI . . . 4/r32/ESP . . # copy ESP to EDI + # next-token-from-slice(EAX, ECX, 0x20/space, out) + # . . push args + 57/push-EDI + 68/push 0x20/imm32 + 51/push-ECX + 50/push-EAX + # . . call + e8/call next-token-from-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP + # out->start should be at the 'a' + # . check-ints-equal(out->start - in->start, 2, msg) + # . . push args + 68/push "F - test-next-token-from-slice: start"/imm32 + 68/push 2/imm32 + # . . push out->start - in->start + 8b/copy 0/mod/indirect 7/rm32/EDI . . . 1/r32/ECX . . # copy *EDI to ECX + 2b/subtract 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # subtract EAX from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # out->end should be after the 'b' + # check-ints-equal(out->end - in->start, 4, msg) + # . . push args + 68/push "F - test-next-token-from-slice: end"/imm32 + 68/push 4/imm32 + # . . push out->end - in->start + 8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 1/r32/ECX 4/disp8 . # copy *(EDI+4) to ECX + 2b/subtract 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # subtract EAX from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-next-token-from-slice-eof: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # var out/EDI : (address slice) = {0, 0} + 68/push 0/imm32/end + 68/push 0/imm32/start + 89/copy 3/mod/direct 7/rm32/EDI . . . 4/r32/ESP . . # copy ESP to EDI + # next-token-from-slice(0, 0, 0x20/space, out) + # . . push args + 57/push-EDI + 68/push 0x20/imm32 + 68/push 0/imm32 + 68/push 0/imm32 + # . . call + e8/call next-token-from-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP + # out should be empty + # . check-ints-equal(out->end - out->start, 0, msg) + # . . push args + 68/push "F - test-next-token-from-slice-eof"/imm32 + 68/push 0/imm32 + # . . push out->start - in->start + 8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 1/r32/ECX 4/disp8 . # copy *(EDI+4) to ECX + 2b/subtract 0/mod/indirect 7/rm32/EDI . . . 1/r32/ECX . . # subtract *EDI from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-next-token-from-slice-nothing: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = " " + b8/copy-to-EAX " "/imm32 + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX + 05/add-to-EAX 4/imm32 + # var out/EDI : (address slice) = {0, 0} + 68/push 0/imm32/end + 68/push 0/imm32/start + 89/copy 3/mod/direct 7/rm32/EDI . . . 4/r32/ESP . . # copy ESP to EDI + # next-token-from-slice(in, 0x20/space, out) + # . . push args + 57/push-EDI + 68/push 0x20/imm32 + 51/push-ECX + 50/push-EAX + # . . call + e8/call next-token-from-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP + # out should be empty + # . check-ints-equal(out->end - out->start, 0, msg) + # . . push args + 68/push "F - test-next-token-from-slice-eof"/imm32 + 68/push 0/imm32 + # . . push out->start - in->start + 8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 1/r32/ECX 4/disp8 . # copy *(EDI+4) to ECX + 2b/subtract 0/mod/indirect 7/rm32/EDI . . . 1/r32/ECX . . # subtract *EDI from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +skip-chars-matching: # in : (address stream), delimiter : byte + # . prolog + 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 + 52/push-EDX + 56/push-ESI + # ESI = in + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI + # ECX = in->read + 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 4/disp8 . # copy *(ESI+4) to ECX + # EBX = in->write + 8b/copy 0/mod/indirect 6/rm32/ESI . . . 3/r32/EBX . . # copy *ESI to EBX + # EDX = delimiter + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0xc/disp8 . # copy *(EBP+12) to EDX +$skip-chars-matching:loop: + # if (in->read >= in->write) break + 39/compare 3/mod/direct 1/rm32/ECX . . . 3/r32/EBX . . # compare ECX with EBX + 7d/jump-if-greater-or-equal $skip-chars-matching:end/disp8 + # EAX = in->data[in->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 + # if (EAX != delimiter) break + 39/compare 3/mod/direct 0/rm32/EAX . . . 2/r32/EDX . . # compare EAX and EDX + 75/jump-if-not-equal $skip-chars-matching:end/disp8 + # ++in->read + 41/inc-ECX + eb/jump $skip-chars-matching:loop/disp8 +$skip-chars-matching:end: + # persist in->read + 89/copy 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 4/disp8 . # copy ECX to *(ESI+4) + # . restore registers + 5e/pop-to-ESI + 5a/pop-to-EDX + 59/pop-to-ECX + 58/pop-to-EAX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-skip-chars-matching: + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-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 + # write(_test-stream, " ab") + # . . push args + 68/push " ab"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # skip-chars-matching(_test-stream, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call skip-chars-matching/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-ints-equal(_test-stream->read, 2, msg) + # . . push args + 68/push "F - test-skip-chars-matching"/imm32 + 68/push 2/imm32 + # . . push *_test-stream->read + b8/copy-to-EAX _test-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 + # end + c3/return + +test-skip-chars-matching-none: + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-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 + # write(_test-stream, "ab") + # . . push args + 68/push "ab"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # skip-chars-matching(_test-stream, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call skip-chars-matching/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-ints-equal(_test-stream->read, 0, msg) + # . . push args + 68/push "F - test-skip-chars-matching-none"/imm32 + 68/push 0/imm32 + # . . push *_test-stream->read + b8/copy-to-EAX _test-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 + # end + c3/return + +# minor fork of 'skip-chars-matching' +skip-chars-not-matching: # in : (address stream), delimiter : byte + # . prolog + 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 + 52/push-EDX + 56/push-ESI + # ESI = in + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI + # ECX = in->read + 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 4/disp8 . # copy *(ESI+4) to ECX + # EBX = in->write + 8b/copy 0/mod/indirect 6/rm32/ESI . . . 3/r32/EBX . . # copy *ESI to EBX + # EDX = delimiter + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0xc/disp8 . # copy *(EBP+12) to EDX +$skip-chars-not-matching:loop: + # if (in->read >= in->write) break + 39/compare 3/mod/direct 1/rm32/ECX . . . 3/r32/EBX . . # compare ECX with EBX + 7d/jump-if-greater-or-equal $skip-chars-not-matching:end/disp8 + # EAX = in->data[in->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 + # if (EAX == delimiter) break + 39/compare 3/mod/direct 0/rm32/EAX . . . 2/r32/EDX . . # compare EAX and EDX + 74/jump-if-equal $skip-chars-not-matching:end/disp8 + # ++in->read + 41/inc-ECX + eb/jump $skip-chars-not-matching:loop/disp8 +$skip-chars-not-matching:end: + # persist in->read + 89/copy 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 4/disp8 . # copy ECX to *(ESI+4) + # . restore registers + 5e/pop-to-ESI + 5a/pop-to-EDX + 59/pop-to-ECX + 58/pop-to-EAX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-skip-chars-not-matching: + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-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 + # write(_test-stream, "ab ") + # . . push args + 68/push "ab "/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # skip-chars-not-matching(_test-stream, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call skip-chars-not-matching/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-ints-equal(_test-stream->read, 2, msg) + # . . push args + 68/push "F - test-skip-chars-not-matching"/imm32 + 68/push 2/imm32 + # . . push *_test-stream->read + b8/copy-to-EAX _test-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 + # end + c3/return + +test-skip-chars-not-matching-none: + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-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 + # write(_test-stream, " ab") + # . . push args + 68/push " ab"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # skip-chars-not-matching(_test-stream, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call skip-chars-not-matching/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-ints-equal(_test-stream->read, 0, msg) + # . . push args + 68/push "F - test-skip-chars-not-matching-none"/imm32 + 68/push 0/imm32 + # . . push *_test-stream->read + b8/copy-to-EAX _test-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 + # end + c3/return + +test-skip-chars-not-matching-all: + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-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 + # write(_test-stream, "ab") + # . . push args + 68/push "ab"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # skip-chars-not-matching(_test-stream, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call skip-chars-not-matching/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-ints-equal(_test-stream->read, 2, msg) + # . . push args + 68/push "F - test-skip-chars-not-matching-all"/imm32 + 68/push 2/imm32 + # . . push *_test-stream->read + b8/copy-to-EAX _test-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 + # end + c3/return + +skip-chars-matching-in-slice: # curr : (address byte), end : (address byte), delimiter : byte -> curr/EAX + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 51/push-ECX + 52/push-EDX + 53/push-EBX + # EAX = curr + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 0/r32/EAX 8/disp8 . # copy *(EBP+8) to EAX + # ECX = end + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 0xc/disp8 . # copy *(EBP+12) to ECX + # EDX = delimiter + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0x10/disp8 . # copy *(EBP+16) to EDX + # EBX = 0 + 31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX +$skip-chars-matching-in-slice:loop: + # if (curr >= end) break + 39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX with ECX + 7d/jump-if-greater-or-equal $skip-chars-matching-in-slice:end/disp8 + # if (*curr != delimiter) break + 8a/copy-byte 0/mod/indirect 0/rm32/EAX . . . 3/r32/BL . . # copy byte at *EAX to BL + 39/compare 3/mod/direct 3/rm32/EBX . . . 2/r32/EDX . . # compare EBX and EDX + 75/jump-if-not-equal $skip-chars-matching-in-slice:end/disp8 + # ++in->read + 40/inc-EAX + eb/jump $skip-chars-matching-in-slice:loop/disp8 +$skip-chars-matching-in-slice:end: + # . restore registers + 5b/pop-to-EBX + 5a/pop-to-EDX + 59/pop-to-ECX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-skip-chars-matching-in-slice: + # (EAX..ECX) = " ab" + b8/copy-to-EAX " ab"/imm32 + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX + 05/add-to-EAX 4/imm32 + # EAX = skip-chars-matching-in-slice(EAX, ECX, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 51/push-ECX + 50/push-EAX + # . . call + e8/call skip-chars-matching-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # check-ints-equal(ECX-EAX, 2, msg) + # . . push args + 68/push "F - test-skip-chars-matching-in-slice"/imm32 + 68/push 2/imm32 + # . . push ECX-EAX + 29/subtract 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # subtract EAX from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # end + c3/return + +test-skip-chars-matching-in-slice-none: + # (EAX..ECX) = "ab" + b8/copy-to-EAX "ab"/imm32 + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX + 05/add-to-EAX 4/imm32 + # EAX = skip-chars-matching-in-slice(EAX, ECX, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 51/push-ECX + 50/push-EAX + # . . call + e8/call skip-chars-matching-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # check-ints-equal(ECX-EAX, 2, msg) + # . . push args + 68/push "F - test-skip-chars-matching-in-slice-none"/imm32 + 68/push 2/imm32 + # . . push ECX-EAX + 29/subtract 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # subtract EAX from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # end + c3/return + +# minor fork of 'skip-chars-matching-in-slice' +skip-chars-not-matching-in-slice: # curr : (address byte), end : (address byte), delimiter : byte -> curr/EAX + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 51/push-ECX + 52/push-EDX + 53/push-EBX + # EAX = curr + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 0/r32/EAX 8/disp8 . # copy *(EBP+8) to EAX + # ECX = end + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 0xc/disp8 . # copy *(EBP+12) to ECX + # EDX = delimiter + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0x10/disp8 . # copy *(EBP+16) to EDX + # EBX = 0 + 31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX +$skip-chars-not-matching-in-slice:loop: + # if (curr >= end) break + 39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX with ECX + 7d/jump-if-greater-or-equal $skip-chars-not-matching-in-slice:end/disp8 + # if (*curr == delimiter) break + 8a/copy-byte 0/mod/indirect 0/rm32/EAX . . . 3/r32/BL . . # copy byte at *EAX to BL + 39/compare 3/mod/direct 3/rm32/EBX . . . 2/r32/EDX . . # compare EBX and EDX + 74/jump-if-equal $skip-chars-not-matching-in-slice:end/disp8 + # ++in->read + 40/inc-EAX + eb/jump $skip-chars-not-matching-in-slice:loop/disp8 +$skip-chars-not-matching-in-slice:end: + # . restore registers + 5b/pop-to-EBX + 5a/pop-to-EDX + 59/pop-to-ECX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-skip-chars-not-matching-in-slice: + # (EAX..ECX) = "ab " + b8/copy-to-EAX "ab "/imm32 + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX + 05/add-to-EAX 4/imm32 + # EAX = skip-chars-not-matching-in-slice(EAX, ECX, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 51/push-ECX + 50/push-EAX + # . . call + e8/call skip-chars-not-matching-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # check-ints-equal(ECX-EAX, 1, msg) + # . . push args + 68/push "F - test-skip-chars-not-matching-in-slice"/imm32 + 68/push 1/imm32 + # . . push ECX-EAX + 29/subtract 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # subtract EAX from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # end + c3/return + +test-skip-chars-not-matching-in-slice-none: + # (EAX..ECX) = " ab" + b8/copy-to-EAX " ab"/imm32 + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX + 05/add-to-EAX 4/imm32 + # EAX = skip-chars-not-matching-in-slice(EAX, ECX, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 51/push-ECX + 50/push-EAX + # . . call + e8/call skip-chars-not-matching-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # check-ints-equal(ECX-EAX, 3, msg) + # . . push args + 68/push "F - test-skip-chars-not-matching-in-slice-none"/imm32 + 68/push 3/imm32 + # . . push ECX-EAX + 29/subtract 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # subtract EAX from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # end + c3/return + +test-skip-chars-not-matching-in-slice-all: + # (EAX..ECX) = "ab" + b8/copy-to-EAX "ab"/imm32 + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX + 05/add-to-EAX 4/imm32 + # EAX = skip-chars-not-matching-in-slice(EAX, ECX, 0x20/space) + # . . push args + 68/push 0x20/imm32 + 51/push-ECX + 50/push-EAX + # . . call + e8/call skip-chars-not-matching-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # check-ints-equal(ECX-EAX, 0, msg) + # . . push args + 68/push "F - test-skip-chars-not-matching-in-slice-all"/imm32 + 68/push 0/imm32 + # . . push ECX-EAX + 29/subtract 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # subtract EAX from ECX + 51/push-ECX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # end + c3/return + +# . . vim:nowrap:textwidth=0 |