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| author | nc <charles.saternos@gmail.com> | 2019-06-29 17:58:32 -0400 |
|---|---|---|
| committer | nc <charles.saternos@gmail.com> | 2019-06-29 17:59:14 -0400 |
| commit | 0721fb58914a7366af380eb330f806c6cdf64a4b (patch) | |
| tree | 5af106a2fb50c44c46566df938520867e4afa915 | |
| parent | aa09f294192e7c481f40b1fd4660a67f4076a339 (diff) | |
| download | mu-0721fb58914a7366af380eb330f806c6cdf64a4b.tar.gz | |
Implement is-label?
| -rw-r--r-- | subx/apps/survey.subx | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/subx/apps/survey.subx b/subx/apps/survey.subx index cf13b0b2..f4183117 100644 --- a/subx/apps/survey.subx +++ b/subx/apps/survey.subx @@ -317,6 +317,81 @@ test-convert-computes-addresses: 5d/pop-to-EBP c3/return +is-label?: # word : (address slice) -> EAX : boolean + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 51/push-ECX + # ECX = word + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX + # ECX = word->end + 8b/copy 1/mod/*+disp8 1/rm32/ECX . . . 1/r32/ECX 4/disp8 . # copy *(ECX+4) to ECX + # *(word->end - 1) == ':' + # . EAX = 0 + 31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX + # . EAX = *((char *) word->end - 1) + 8a/copy-byte 1/mod/*+disp8 1/rm32/ECX . . . 0/r32/AL -1/disp8 . # copy byte at *(ECX-1) to AL + # . (word->end - 1)/EAX == ':' + 3d/compare-EAX-and 3A/imm32/colon + b8/copy-to-EAX 1/imm32/true + 74/jump-if-equal $is-label?:end/disp8 + b8/copy-to-EAX 0/imm32/false +$is-label?:end: + # . restore registers + 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-is-label?: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP +$test-is-label?:true: + # var slice/ECX = slice("AAA:") + 68/push _test-label-slice-end1/imm32 + 68/push _test-label-slice-start/imm32 + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # is-label?(slice/ECX) + 51/push-ECX + e8/call is-label?/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 1, msg) + # . . push args + 68/push "F - test-is-label?:true"/imm32 + 68/push 1/imm32 + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP +$test-is-label?:false: + # var slice/ECX = slice("AAA") + 68/push _test-label-slice-end2/imm32 + 68/push _test-label-slice-start/imm32 + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # is-label?(slice/ECX) + 51/push-ECX + e8/call is-label?/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0, msg) + # . . push args + 68/push "F - test-is-label?:false"/imm32 + 68/push 0/imm32 + 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 + compute-offsets: # in : (address buffered-file), segments : (address stream {string, segment-info}), labels : (address stream {string, label-info}) # pseudocode: # var curr-segment-name = 0 |