810 lines
39 KiB
Plaintext
810 lines
39 KiB
Plaintext
# some utilities for converting numbers to/from hex
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# lowercase letters only for now
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== code
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# instruction effective address register displacement immediate
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# . op subop mod rm32 base index scale r32
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# . 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
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# main:
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e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
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# syscall(exit, Num-test-failures)
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8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX
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b8/copy-to-EAX 1/imm32/exit
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cd/syscall 0x80/imm8
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is-hex-int?: # in : (address slice) -> EAX : boolean
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# . save registers
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51/push-ECX
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52/push-EDX
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53/push-EBX
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# ECX = s
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8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX
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# EDX = s->end
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8b/copy 1/mod/*+disp8 1/rm32/ECX . . . 2/r32/EDX 4/disp8 . # copy *(ECX+4) to EDX
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# curr/ECX = s->start
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8b/copy 0/mod/indirect 1/rm32/ECX . . . 1/r32/ECX . . # copy *ECX to ECX
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# if s is empty return false
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b8/copy-to-EAX 0/imm32/false
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39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX
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7d/jump-if-greater-or-equal $is-hex-int?:end/disp8
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# skip past leading '-'
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# . if (*curr == '-') ++curr
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31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
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8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 3/r32/BL . . # copy byte at *ECX to BL
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81 7/subop/compare 3/mod/direct 3/rm32/EBX . . . . . 0x2d/imm32/- # compare EBX
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75/jump-if-not-equal $is-hex-int?:initial-0/disp8
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# . ++curr
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41/increment-ECX
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# skip past leading '0x'
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$is-hex-int?:initial-0:
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# . if (*curr != '0') jump to loop
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31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
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8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 3/r32/BL . . # copy byte at *ECX to BL
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81 7/subop/compare 3/mod/direct 3/rm32/EBX . . . . . 0x30/imm32/0 # compare EBX
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75/jump-if-not-equal $is-hex-int?:loop/disp8
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# . ++curr
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41/increment-ECX
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$is-hex-int?:initial-0x:
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# . if (curr >= in->end) return true
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39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX
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7d/jump-if-greater-or-equal $is-hex-int?:true/disp8
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# . if (*curr != 'x') jump to loop # the previous '0' is still valid so doesn't need to be checked again
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31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
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8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 3/r32/BL . . # copy byte at *ECX to BL
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81 7/subop/compare 3/mod/direct 3/rm32/EBX . . . . . 0x78/imm32/x # compare EBX
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75/jump-if-not-equal $is-hex-int?:loop/disp8
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# . ++curr
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41/increment-ECX
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$is-hex-int?:loop:
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# if (curr >= in->end) return true
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39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX
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7d/jump-if-greater-or-equal $is-hex-int?:true/disp8
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# EAX = is-hex-digit?(*curr)
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# . . push args
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8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
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50/push-EAX
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# . . call
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e8/call is-hex-digit?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# if EAX == false return false
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3d/compare-with-EAX 0/imm32
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74/jump-if-equal $is-hex-int?:end/disp8
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# ++curr
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41/increment-ECX
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# loop
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eb/jump $is-hex-int?:loop/disp8
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$is-hex-int?:true:
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# return true
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b8/copy-to-EAX 1/imm32/true
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$is-hex-int?:end:
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# . restore registers
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5b/pop-to-EBX
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5a/pop-to-EDX
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59/pop-to-ECX
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = "34"
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68/push _test-slice-hex-int-end/imm32
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68/push _test-slice-hex-int/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-is-hex-int"/imm32
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68/push 1/imm32/true
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int-handles-letters:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = "34a"
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68/push _test-slice-hex-int-letters-end/imm32
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68/push _test-slice-hex-int-letters/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-is-hex-int-handles-letters"/imm32
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68/push 1/imm32/true
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int-with-trailing-char:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = "34q"
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68/push _test-slice-digits-and-char-end/imm32
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68/push _test-slice-digits-and-char/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-is-hex-int-with-trailing-char"/imm32
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68/push 0/imm32/false
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int-with-leading-char:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = "q34"
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68/push _test-slice-char-and-digits-end/imm32
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68/push _test-slice-char-and-digits/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-is-hex-int-with-leading-char"/imm32
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68/push 0/imm32/false
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int-empty:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = ""
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68/push _test-slice-empty-end/imm32
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68/push _test-slice-empty/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-is-hex-int-empty"/imm32
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68/push 0/imm32/false
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int-handles-0x-prefix:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = "0x3a"
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68/push _test-slice-hex-int-with-0x-prefix-end/imm32
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68/push _test-slice-hex-int-with-0x-prefix/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-is-hex-int-handles-0x-prefix"/imm32
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68/push 1/imm32/true
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int-handles-negative:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = "-34a"
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68/push _test-slice-hex-int-letters-end/imm32
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68/push _test-slice-hex-int-letters-negative/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-is-hex-int-handles-negative"/imm32
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68/push 1/imm32/true
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-is-hex-int-handles-negative-0x-prefix:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = "-0x3a"
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68/push _test-slice-hex-int-with-0x-prefix-end/imm32
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68/push _test-slice-hex-int-with-0x-prefix-negative/imm32
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = is-hex-int?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call is-hex-int?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-is-hex-int-handles-negative-0x-prefix"/imm32
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68/push 1/imm32/true
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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parse-hex-int: # in : (address slice) -> result/EAX
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# . save registers
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51/push-ECX
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52/push-EDX
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53/push-EBX
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56/push-ESI
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# result/EBX = 0
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31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
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# ECX = s
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8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX
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# EDX = s->end
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8b/copy 1/mod/*+disp8 1/rm32/ECX . . . 2/r32/EDX 4/disp8 . # copy *(ECX+4) to EDX
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# curr/ECX = s->start
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8b/copy 0/mod/indirect 1/rm32/ECX . . . 1/r32/ECX . . # copy *ECX to ECX
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# negate?/ESI = false
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31/xor 3/mod/direct 6/rm32/ESI . . . 6/r32/ESI . . # clear ESI
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$parse-hex-int:negative:
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# . if (*curr == '-') negate = true
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31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
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8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
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81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0x2d/imm32/- # compare EAX
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75/jump-if-not-equal $parse-hex-int:initial-0/disp8
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# . ++curr
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41/increment-ECX
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# . negate = true
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be/copy-to-ESI 1/imm32/true
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$parse-hex-int:initial-0:
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# skip past leading '0x'
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# . if (*curr != '0') jump to loop
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8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
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81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0x30/imm32/0 # compare EAX
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75/jump-if-not-equal $parse-hex-int:loop/disp8
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# . ++curr
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41/increment-ECX
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$parse-hex-int:initial-0x:
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# . if (curr >= in->end) return result
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39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX
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7d/jump-if-greater-or-equal $parse-hex-int:end/disp8
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# . if (*curr != 'x') jump to loop # the previous '0' is still valid so doesn't need to be checked again
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31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
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8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
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81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0x78/imm32/x # compare EAX
|
|
75/jump-if-not-equal $parse-hex-int:loop/disp8
|
|
# . ++curr
|
|
41/increment-ECX
|
|
$parse-hex-int:loop:
|
|
# if (curr >= in->end) break
|
|
39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX
|
|
7d/jump-if-greater-or-equal $parse-hex-int:negate/disp8
|
|
# EAX = from-hex-char(*curr)
|
|
# . . copy arg to EAX
|
|
8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
|
|
# . . call
|
|
e8/call from-hex-char/disp32
|
|
# result = result * 16 + EAX
|
|
c1/shift 4/subop/left 3/mod/direct 3/rm32/EBX . . . . . 4/imm8 # shift EBX left by 4 bits
|
|
01/add 3/mod/direct 3/rm32/EBX . . . 0/r32/EAX . . # add EAX to EBX
|
|
# ++curr
|
|
41/increment-ECX
|
|
# loop
|
|
eb/jump $parse-hex-int:loop/disp8
|
|
$parse-hex-int:negate:
|
|
81 7/subop/compare 3/mod/direct 6/rm32/ESI . . . . . 0/imm32 # compare ESI
|
|
74/jump-if-equal $parse-hex-int:end/disp8
|
|
f7 3/subop/negate 3/mod/direct 3/rm32/EBX . . . . . . # negate EBX
|
|
$parse-hex-int:end:
|
|
89/copy 3/mod/direct 0/rm32/EAX . . . 3/r32/EBX . . # copy EBX to EAX
|
|
# . restore registers
|
|
5e/pop-to-ESI
|
|
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-parse-hex-int-single-digit:
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# var slice/ECX = "a"
|
|
68/push _test-slice-hex-int-single-letter-end/imm32
|
|
68/push _test-slice-hex-int-single-letter/imm32
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# EAX = parse-hex-int(slice)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call parse-hex-int/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(EAX, 0xa, msg)
|
|
# . . push args
|
|
68/push "F - test-parse-hex-int-single-digit"/imm32
|
|
68/push 0xa/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
|
|
|
|
test-parse-hex-int-multi-digit:
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# var slice/ECX = "34a"
|
|
68/push _test-slice-hex-int-letters-end/imm32
|
|
68/push _test-slice-hex-int-letters/imm32
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# EAX = parse-hex-int(slice)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call parse-hex-int/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(EAX, 0x34a, msg)
|
|
# . . push args
|
|
68/push "F - test-parse-hex-int-multi-digit"/imm32
|
|
68/push 0x34a/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
|
|
|
|
test-parse-hex-int-0x-prefix:
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# var slice/ECX = "0x34"
|
|
68/push _test-slice-hex-int-with-0x-prefix-end/imm32
|
|
68/push _test-slice-hex-int-with-0x-prefix/imm32
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# EAX = parse-hex-int(slice)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call parse-hex-int/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(EAX, 0x34a, msg)
|
|
# . . push args
|
|
68/push "F - test-parse-hex-int-0x-prefix"/imm32
|
|
68/push 0x34/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
|
|
|
|
test-parse-hex-int-zero:
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# var slice/ECX = "0"
|
|
68/push _test-slice-hex-int-zero-end/imm32
|
|
68/push _test-slice-hex-int-zero/imm32
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# EAX = parse-hex-int(slice)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call parse-hex-int/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(EAX, 0x34a, msg)
|
|
# . . push args
|
|
68/push "F - test-parse-hex-int-zero"/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
|
|
|
|
test-parse-hex-int-0-prefix:
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# var slice/ECX = "03"
|
|
68/push _test-slice-hex-int-with-0-prefix-end/imm32
|
|
68/push _test-slice-hex-int-with-0-prefix/imm32
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# EAX = parse-hex-int(slice)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call parse-hex-int/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(EAX, 0x3, msg)
|
|
# . . push args
|
|
68/push "F - test-parse-hex-int-0-prefix"/imm32
|
|
68/push 0x3/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
|
|
|
|
test-parse-hex-int-negative:
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# var slice/ECX = "-03"
|
|
68/push _test-slice-hex-int-negative-with-0-prefix-end/imm32
|
|
68/push _test-slice-hex-int-negative-with-0-prefix/imm32
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# EAX = parse-hex-int(slice)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call parse-hex-int/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(EAX, 0xfffffffd, msg)
|
|
# . . push args
|
|
68/push "F - test-parse-hex-int-negative"/imm32
|
|
68/push 0xfffffffd/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
|
|
|
|
is-hex-digit?: # c : byte -> 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 = c
|
|
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX
|
|
# return false if c < '0'
|
|
b8/copy-to-EAX 0/imm32/false
|
|
81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x30/imm32 # compare ECX
|
|
7c/jump-if-lesser $is-hex-digit?:end/disp8
|
|
# return false if c > 'f'
|
|
81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x66/imm32 # compare ECX
|
|
7f/jump-if-greater $is-hex-digit?:end/disp8
|
|
# return true if c <= '9'
|
|
b8/copy-to-EAX 1/imm32/true
|
|
81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x39/imm32 # compare ECX
|
|
7e/jump-if-lesser-or-equal $is-hex-digit?:end/disp8
|
|
# return true if c >= 'a'
|
|
81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x61/imm32 # compare ECX
|
|
7d/jump-if-greater-or-equal $is-hex-digit?:end/disp8
|
|
# otherwise return false
|
|
b8/copy-to-EAX 0/imm32/false
|
|
$is-hex-digit?: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-hex-below-0:
|
|
# EAX = is-hex-digit?(0x2f)
|
|
# . . push args
|
|
68/push 0x2f/imm32
|
|
# . . call
|
|
e8/call is-hex-digit?/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-hex-below-0"/imm32
|
|
68/push 0/imm32/false
|
|
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
|
|
c3/return
|
|
|
|
test-hex-0-to-9:
|
|
# EAX = is-hex-digit?(0x30)
|
|
# . . push args
|
|
68/push 0x30/imm32
|
|
# . . call
|
|
e8/call is-hex-digit?/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-hex-at-0"/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
|
|
# EAX = is-hex-digit?(0x39)
|
|
# . . push args
|
|
68/push 0x39/imm32
|
|
# . . call
|
|
e8/call is-hex-digit?/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-hex-at-9"/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
|
|
c3/return
|
|
|
|
test-hex-above-9-to-a:
|
|
# EAX = is-hex-digit?(0x3a)
|
|
# . . push args
|
|
68/push 0x3a/imm32
|
|
# . . call
|
|
e8/call is-hex-digit?/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-hex-above-9-to-a"/imm32
|
|
68/push 0/imm32/false
|
|
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
|
|
c3/return
|
|
|
|
test-hex-a-to-f:
|
|
# EAX = is-hex-digit?(0x61)
|
|
# . . push args
|
|
68/push 0x61/imm32
|
|
# . . call
|
|
e8/call is-hex-digit?/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-hex-at-a"/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
|
|
# EAX = is-hex-digit?(0x66)
|
|
# . . push args
|
|
68/push 0x66/imm32
|
|
# . . call
|
|
e8/call is-hex-digit?/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-hex-at-f"/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
|
|
c3/return
|
|
|
|
test-hex-above-f:
|
|
# EAX = is-hex-digit?(0x67)
|
|
# . . push args
|
|
68/push 0x67/imm32
|
|
# . . call
|
|
e8/call is-hex-digit?/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-hex-above-f"/imm32
|
|
68/push 0/imm32/false
|
|
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
|
|
c3/return
|
|
|
|
from-hex-char: # in/EAX : byte -> out/EAX : num
|
|
# no error checking; accepts argument in EAX
|
|
# if EAX <= '9' return EAX - '0'
|
|
3d/compare-EAX 0x39/imm32/9
|
|
7f/jump-if-greater $from-hex-char:else/disp8
|
|
2d/subtract-from-EAX 0x30/imm32/0
|
|
c3/return
|
|
$from-hex-char:else:
|
|
# otherwise return EAX - 'a' + 10
|
|
2d/subtract-from-EAX 0x57/imm32/a-10
|
|
c3/return
|
|
|
|
to-hex-char: # in/EAX : nibble -> out/EAX : byte
|
|
# no error checking; accepts argument in EAX
|
|
# if EAX <= 9 return EAX + '0'
|
|
3d/compare-EAX 0x9/imm32/9
|
|
7f/jump-if-greater $to-hex-char:else/disp8
|
|
05/add-to-EAX 0x30/imm32/0
|
|
c3/return
|
|
$to-hex-char:else:
|
|
# otherwise return EAX + 'a' - 10
|
|
05/add-to-EAX 0x57/imm32/a-10
|
|
c3/return
|
|
|
|
== data
|
|
|
|
_test-slice-empty:
|
|
# nothing
|
|
_test-slice-empty-end:
|
|
|
|
_test-slice-hex-int:
|
|
33/3 34/4
|
|
_test-slice-hex-int-end:
|
|
|
|
_test-slice-hex-int-letters-negative:
|
|
2d/-
|
|
_test-slice-hex-int-letters:
|
|
33/3 34/4 61/a
|
|
_test-slice-hex-int-letters-end:
|
|
|
|
_test-slice-hex-int-single-letter:
|
|
61/a
|
|
_test-slice-hex-int-single-letter-end:
|
|
|
|
_test-slice-char-and-digits:
|
|
71/q 33/3 34/4
|
|
_test-slice-char-and-digits-end:
|
|
|
|
_test-slice-digits-and-char:
|
|
33/3 34/4 71/q
|
|
_test-slice-digits-and-char-end:
|
|
|
|
_test-slice-hex-int-with-0x-prefix-negative:
|
|
2d/-
|
|
_test-slice-hex-int-with-0x-prefix:
|
|
30/0 78/x 33/3 34/4
|
|
_test-slice-hex-int-with-0x-prefix-end:
|
|
|
|
_test-slice-hex-int-zero:
|
|
30/0
|
|
_test-slice-hex-int-zero-end:
|
|
|
|
_test-slice-hex-int-with-0-prefix:
|
|
30/0 33/3
|
|
_test-slice-hex-int-with-0-prefix-end:
|
|
|
|
_test-slice-hex-int-negative-with-0-prefix:
|
|
2d/- 30/0 33/3
|
|
_test-slice-hex-int-negative-with-0-prefix-end:
|
|
|
|
# . . vim:nowrap:textwidth=0
|