diff options
Diffstat (limited to 'subx/072slice.subx')
| -rw-r--r-- | subx/072slice.subx | 146 |
1 files changed, 144 insertions, 2 deletions
diff --git a/subx/072slice.subx b/subx/072slice.subx index a62e87e8..3829ecd6 100644 --- a/subx/072slice.subx +++ b/subx/072slice.subx @@ -7,8 +7,7 @@ # . 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 #? Entry: # run a single test, while debugging -#? e8/call test-slice-starts-with-fails/disp32 -#? e8/call test-slice-starts-with-single-character/disp32 +#? e8/call test-slice-to-string/disp32 #? # 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 @@ -795,6 +794,149 @@ test-write-slice: 5d/pop-to-EBP c3/return +# copy a slice into a new (dynamically allocated) string +slice-to-string: # ad : (address allocation-descriptor), in : (address slice) -> out/EAX : (address array) + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + # ESI = in + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI + # curr/EDX = in->start + 8b/copy 0/mod/indirect 6/rm32/ESI . . . 2/r32/EDX . . # copy *ESI to EDX + # max/EBX = in->end + 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 3/r32/EBX 4/disp8 . # copy *(ESI+4) to EBX + # size/ECX = max - curr + 4 # total size of output string (including the initial length) + 89/copy 3/mod/direct 1/rm32/ECX . . . 3/r32/EBX . . # copy EBX to ECX + 29/subtract 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # subtract EDX from ECX + 81 0/subop/add 3/mod/direct 1/rm32/ECX . . . . . 4/imm32 # add to ECX + # out/EAX = allocate(ad, size) + # . . push args + 51/push-ECX + ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) + # . . call + e8/call allocate/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # if (EAX == 0) abort + 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0/imm32 # compare EAX + 74/jump-if-equal $slice-to-string:abort/disp8 + # *out = size-4 + 89/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy ECX to *EAX + 81 5/subop/subtract 0/mod/indirect 0/rm32/EAX . . . . . 4/imm32 # subtract 4 from *EAX + # save out + 50/push-EAX + # EAX = _append-4(EAX+4, EAX+size, curr, max) # clobbering ECX + # . . push args + 53/push-EBX + 52/push-EDX + # . . push EAX+size (clobbering ECX) + 01/add 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # add EAX to ECX + 51/push-ECX + # . . push EAX+4 (clobbering EAX) + 81 0/subop/add 3/mod/direct 0/rm32/EAX . . . . . 4/imm32 # add to EAX + 50/push-EAX + # . . call + e8/call _append-4/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP + # restore out (assumes _append-4 can't error) + 58/pop-to-EAX +$slice-to-string:end: + # . reclaim locals + # . restore registers + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +$slice-to-string:abort: + # . _write(2/stderr, error) + # . . push args + 68/push "slice-to-string: out of space"/imm32 + 68/push 2/imm32/stderr + # . . call + e8/call _write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . syscall(exit, 1) + bb/copy-to-EBX 1/imm32 + b8/copy-to-EAX 1/imm32/exit + cd/syscall 0x80/imm8 + # never gets here + +test-slice-to-string: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # var slice/ECX = "Abc" + 68/push _test-slice-data-3/imm32/end + 68/push _test-slice-data-0/imm32/start + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = slice-to-string(Heap, slice) + # . . push args + 51/push-ECX + 68/push Heap/imm32 + # . . call + e8/call slice-to-string/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP +#? # dump word-slice {{{ +#? # . write(2/stderr, "AA: ") +#? # . . push args +#? 68/push "AA: "/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP +#? # . write(2/stderr, EAX) +#? # . . push args +#? 50/push-EAX +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP +#? # . write(2/stderr, "$") +#? # . . push args +#? 68/push "$"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP +#? # . write(2/stderr, "\n") +#? # . . push args +#? 68/push Newline/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP +#? # }}} + # EAX = string-equal?(EAX, "Abc") + # . . push args + 68/push "Abc"/imm32 + 50/push-EAX + # . . call + e8/call string-equal?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-ints-equal(EAX, 1, msg) + # . . push args + 68/push "F - test-slice-to-string"/imm32 + 68/push 1/imm32/true + 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 + == data _test-slice-data-0: |