diff options
Diffstat (limited to 'subx')
| -rw-r--r-- | subx/074print-int-decimal.subx | 285 | ||||
| -rwxr-xr-x | subx/apps/assort | bin | 20649 -> 21302 bytes | |||
| -rwxr-xr-x | subx/apps/crenshaw2-1 | bin | 17837 -> 18490 bytes | |||
| -rwxr-xr-x | subx/apps/crenshaw2-1b | bin | 18396 -> 19049 bytes | |||
| -rw-r--r-- | subx/apps/dquotes | bin | 20263 -> 20916 bytes | |||
| -rwxr-xr-x | subx/apps/factorial | bin | 16753 -> 17406 bytes | |||
| -rwxr-xr-x | subx/apps/handle | bin | 17527 -> 18180 bytes | |||
| -rwxr-xr-x | subx/apps/hex | bin | 20846 -> 21499 bytes | |||
| -rwxr-xr-x | subx/apps/pack | bin | 35438 -> 36091 bytes |
9 files changed, 285 insertions, 0 deletions
diff --git a/subx/074print-int-decimal.subx b/subx/074print-int-decimal.subx new file mode 100644 index 00000000..d9d06f2d --- /dev/null +++ b/subx/074print-int-decimal.subx @@ -0,0 +1,285 @@ +# Helper to print an int32 in decimal. + +== 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 + +#? Entry: # run a single test, while debugging +#? e8/call test-print-int32-decimal/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 +#? cd/syscall 0x80/imm8 + +print-int32-decimal: # out : (address stream), n : int32 + # works by generating characters from lowest to highest and pushing them + # to the stack, before popping them one by one into the stream + # + # pseudocode: + # copy ESP to EBX + # EAX = n + # while true + # if (EAX == 0) break + # sign-extend EAX into EDX + # EAX, EDX = EAX/10, EAX%10 + # push EDX + # if n < 0 + # push '-' - 0x30 = -3 + # w/EAX = out->write + # max/ECX = out->length + # curr/EDI = out->data[out->write] + # while true + # if (ESP == EBX) break + # if (curr >= max) abort + # pop into EDX + # EDX += '0' # convert decimal digit to ascii + # *curr = DL + # ++curr + # ++w + # out->write = w + # + # . 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 + 53/push-EBX + 57/push-EDI + # copy ESP to EBX + 89/copy 3/mod/direct 3/rm32/EBX . . . 4/r32/ESP . . # copy ESP to EBX + # ten/ECX = 10 + b9/copy-to-ECX 0xa/imm32 + # EAX = |n| + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 0/r32/EAX 0xc/disp8 . # copy *(EBP+12) to EAX + 3d/compare-EAX-with 0/imm32 + 7d/jump-if-greater-or-equal $print-int32-decimal:read-loop/disp8 +$print-int32-decimal:negative: + f7 3/subop/negate 3/mod/direct 0/rm32/EAX . . . . . . # negate EAX +$print-int32-decimal:read-loop: + # if (EAX == 0) break + 3d/compare-EAX-and 0/imm32 + 74/jump-if-equal $print-int32-decimal:read-break/disp8 + # sign-extend + 99/sign-extend-EAX-into-EDX + # EAX, EDX = divide-with-remainder EAX/ten, EAX%ten + f7 7/subop/divide-by 3/mod/direct 1/rm32/ECX . . . . . . # divide EDX:EAX by ECX, storing quotient in EAX and remainder in EDX + # push EDX + 52/push-EDX + eb/jump $print-int32-decimal:read-loop/disp8 +$print-int32-decimal:read-break: + # if (n < 0) push('-') + 81 7/subop/compare 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 0/imm32 # compare *(EBP+12) + 7d/jump-if-greater-or-equal $print-int32-decimal:write/disp8 +$print-int32-decimal:push-negative: + 68/push -3/imm32/dash-minus-zero + # fall through +$print-int32-decimal:write: + # EDI = out + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI + # max/ECX = &out->data[out->length] + 8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 1/r32/ECX 8/disp8 . # copy *(EDI+8) to ECX + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 1/index/ECX . 1/r32/ECX 0xc/disp8 . # copy EDI+ECX+12 to ECX + # w/EAX = out->write + 8b/copy 0/mod/indirect 7/rm32/EDI . . . 0/r32/EAX . . # copy *EDI to EAX + # curr/EDI = &out->data[out->write] + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 0/index/EAX . 7/r32/EDI 0xc/disp8 . # copy EDI+EAX+12 to EDI +$print-int32-decimal:write-loop: + # if (ESP == EBX) break + 39/compare 3/mod/direct 4/rm32/ESP . . . 3/r32/EBX . . # compare ESP and EBX + 74/jump-if-equal $print-int32-decimal:write-break/disp8 + # if (curr >= max) abort + 39/compare 3/mod/direct 7/rm32/EDI . . . 1/r32/ECX . . # compare EDI and ECX + 7d/jump-if-greater-or-equal $print-int32-decimal:abort/disp8 + # pop into EDX + 5a/pop-into-EDX + # EDX += '0' + 81 0/subop/add 3/mod/direct 2/rm32/EDX . . . . . 0x30/imm32/zero # add to EDX +$print-int32-decimal:write-char: + # *curr = DL + 88/copy-byte 0/mod/indirect 7/rm32/EDI . . . 2/r32/DL . . # copy DL to byte at *ECX + # ++curr + 47/increment-EDI + # ++w + 40/increment-EAX + eb/jump $print-int32-decimal:write-loop/disp8 +$print-int32-decimal:write-break: + # out->write = w + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI + 89/copy 0/mod/indirect 7/rm32/EDI . . . 0/r32/EAX . . # copy EAX to *EDI +$print-int32-decimal:end: + # . restore registers + 5f/pop-to-EDI + 5b/pop-to-EBX + 5a/pop-to-EDX + 59/pop-to-ECX + 58/pop-to-EAX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +$print-int32-decimal:abort: + # . _write(2/stderr, error) + # . . push args + 68/push "print-int32-decimal: 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-print-int32-decimal: + # check that a single-digit number converts correctly + # 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 + # print-int32-decimal(_test-stream, 9) + # . . push args + 68/push 9/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call print-int32-decimal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-stream-equal(_test-stream, "9", msg) + # . . push args + 68/push "F - test-print-int32-decimal"/imm32 + 68/push "9"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-print-int32-decimal-multiple-digits: + # check that a multi-digit number converts correctly + # 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 + # print-int32-decimal(_test-stream, 10) + # . . push args + 68/push 0xa/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call print-int32-decimal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-stream-equal(_test-stream, "10", msg) + # . . push args + 68/push "F - test-print-int32-decimal-multiple-digits"/imm32 + 68/push "10"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-print-int32-decimal-negative: + # check that a negative single-digit number converts correctly + # 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 + # print-int32-decimal(_test-stream, -9) + # . . push args + 68/push -9/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call print-int32-decimal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP +#? # dump _test-stream {{{ +#? # . 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-stream(2/stderr, _test-stream) +#? # . . push args +#? 68/push _test-stream/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP +#? # . write(2/stderr, "$\n") +#? # . . push args +#? 68/push "$\n"/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 +#? # }}} + # check-stream-equal(_test-stream, "-9", msg) + # . . push args + 68/push "F - test-print-int32-decimal-negative"/imm32 + 68/push "-9"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-print-int32-decimal-negative-multiple-digits: + # check that a multi-digit number converts correctly + # 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 + # print-int32-decimal(_test-stream, -10) + # . . push args + 68/push -0xa/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call print-int32-decimal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-stream-equal(_test-stream, "-10", msg) + # . . push args + 68/push "F - test-print-int32-decimal-negative-multiple-digits"/imm32 + 68/push "-10"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call check-stream-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 diff --git a/subx/apps/assort b/subx/apps/assort index 456f1969..007ddaa7 100755 --- a/subx/apps/assort +++ b/subx/apps/assort Binary files differdiff --git a/subx/apps/crenshaw2-1 b/subx/apps/crenshaw2-1 index 4299a8dd..51765a39 100755 --- a/subx/apps/crenshaw2-1 +++ b/subx/apps/crenshaw2-1 Binary files differdiff --git a/subx/apps/crenshaw2-1b b/subx/apps/crenshaw2-1b index e2ab939d..6f8a2228 100755 --- a/subx/apps/crenshaw2-1b +++ b/subx/apps/crenshaw2-1b Binary files differdiff --git a/subx/apps/dquotes b/subx/apps/dquotes index ea8e81cd..e1d12550 100644 --- a/subx/apps/dquotes +++ b/subx/apps/dquotes Binary files differdiff --git a/subx/apps/factorial b/subx/apps/factorial index c7498b32..74d03c89 100755 --- a/subx/apps/factorial +++ b/subx/apps/factorial Binary files differdiff --git a/subx/apps/handle b/subx/apps/handle index 192ac6d9..17ae017d 100755 --- a/subx/apps/handle +++ b/subx/apps/handle Binary files differdiff --git a/subx/apps/hex b/subx/apps/hex index e53aed27..1d455fbd 100755 --- a/subx/apps/hex +++ b/subx/apps/hex Binary files differdiff --git a/subx/apps/pack b/subx/apps/pack index e2139eb6..54c3f203 100755 --- a/subx/apps/pack +++ b/subx/apps/pack Binary files differ |