# new data structure: a slice is an open interval of addresses [start, end)
# that includes 'start' but not 'end'
== 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-slice-starts-with-fails/disp32
#? e8/call test-slice-starts-with-single-character/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
slice-empty?: # s : (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 = s
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX
# if (s->start == s->end) return true
# . EAX = s->start
8b/copy 0/mod/indirect 1/rm32/ECX . . . 0/r32/EAX . . # copy *ECX to EAX
# . compare EAX with s->end
39/compare 1/mod/*+disp8 1/rm32/ECX . . . 0/r32/EAX 4/disp8 . # compare EAX and *(ECX+4)
b8/copy-to-EAX 1/imm32/true
74/jump-if-equal $slice-empty?:end/disp8
b8/copy-to-EAX 0/imm32/false
$slice-empty?: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-slice-empty-true:
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX = {34, 34}
68/push 34/imm32/end
68/push 34/imm32/start
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
# slice-empty?(slice)
# . . push args
51/push-ECX
# . . call
e8/call slice-empty?/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-slice-empty-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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
test-slice-empty-false:
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX = {34, 23}
68/push 23/imm32/end
68/push 34/imm32/start
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
# slice-empty?(slice)
# . . push args
51/push-ECX
# . . call
e8/call slice-empty?/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-slice-empty-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
slice-equal?: # s : (address slice), p : (address string) -> EAX : boolean
# pseudocode:
# currs = s->start
# maxs = s->end
# if (maxs - currs != p->length) return false
# currp = p->data
# while (currs < maxs)
# if (*currs != *currp) return false
# ++currs
# ++currp
# return true
#
# registers:
# currs: EDX
# maxs: ESI
# currp: EBX
# *currs: EAX
# *currp: ECX
#
# . 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
56/push-ESI
# ESI = s
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI
# currs/EDX = s->start
8b/copy 0/mod/indirect 6/rm32/ESI . . . 2/r32/EDX . . # copy *ESI to EDX
# maxs/ESI = s->end
8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 6/r32/ESI 4/disp8 . # copy *(ESI+4) to ESI
# EBX = p
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 3/r32/EBX 0xc/disp8 . # copy *(EBP+12) to EBX
# EAX = maxs - currs
89/copy 3/mod/direct 0/rm32/EAX . . . 6/r32/ESI . . # copy ESI to EAX
29/subtract 3/mod/direct 0/rm32/EAX . . . 2/r32/EDX . . # subtract EDX from EAX
# if (EAX != p->length) return false
39/compare 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # compare *EBX and EAX
75/jump-if-not-equal $slice-equal?:false/disp8
# currp/EBX = p->data
81 0/subop/add 3/mod/direct 3/rm32/EBX . . . . . 4/imm32 # add to EBX
# EAX = ECX = 0
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
31/xor 3/mod/direct 1/rm32/ECX . . . 1/r32/ECX . . # clear ECX
$slice-equal?:loop:
# if (currs >= maxs) return true
39/compare 3/mod/direct 2/rm32/EDX . . . 6/r32/ESI . . # compare EDX and ESI
7d/jump-if-greater-or-equal $slice-equal?:true/disp8
# AL = *currp
8a/copy-byte 0/mod/indirect 3/rm32/EBX . . . 0/r32/AL . . # copy byte at *EBX to AL
# CL = *currs
8a/copy-byte 0/mod/indirect 2/rm32/EDX . . . 1/r32/CL . . # copy byte at *EDX to CL
# if (EAX != ECX) return false
39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX and ECX
75/jump-if-not-equal $slice-equal?:false/disp8
# ++currp
43/increment-EBX
# ++currs
42/increment-EDX
eb/jump $slice-equal?:loop/disp8
$slice-equal?:false:
b8/copy-to-EAX 0/imm32
eb/jump $slice-equal?:end/disp8
$slice-equal?:true:
b8/copy-to-EAX 1/imm32
$slice-equal?:end:
# . 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-slice-equal:
# - slice-equal?(slice("Abc"), "Abc") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
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-equal?(ECX, "Abc")
# . . push args
68/push "Abc"/imm32
51/push-ECX
# . . call
e8/call slice-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-equal"/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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
test-slice-equal-false:
# - slice-equal?(slice("bcd"), "Abc") == 0
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
68/push _test-slice-data-4/imm32/end
68/push _test-slice-data-1/imm32/start
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
# EAX = slice-equal?(ECX, "Abc")
# . . push args
68/push "Abc"/imm32
51/push-ECX
# . . call
e8/call slice-equal?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(EAX, 0, msg)
# . . push args
68/push "F - test-slice-equal-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
test-slice-equal-too-long:
# - slice-equal?(slice("Abcd"), "Abc") == 0
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
68/push _test-slice-data-4/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-equal?(ECX, "Abc")
# . . push args
68/push "Abc"/imm32
51/push-ECX
# . . call
e8/call slice-equal?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(EAX, 0, msg)
# . . push args
68/push "F - test-slice-equal-too-long"/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-slice-equal-too-short:
# - slice-equal?(slice("A"), "Abc") == 0
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
68/push _test-slice-data-1/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-equal?(ECX, "Abc")
# . . push args
68/push "Abc"/imm32
51/push-ECX
# . . call
e8/call slice-equal?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(EAX, 0, msg)
# . . push args
68/push "F - test-slice-equal-too-short"/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-slice-equal-empty:
# - slice-equal?(slice(""), "Abc") == 0
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
68/push _test-slice-data-0/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-equal?(ECX, "Abc")
# . . push args
68/push "Abc"/imm32
51/push-ECX
# . . call
e8/call slice-equal?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(EAX, 0, msg)
# . . push args
68/push "F - test-slice-equal-empty"/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-slice-equal-with-empty:
# - slice-equal?(slice("Ab"), "") == 0
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
68/push _test-slice-data-2/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-equal?(ECX, "")
# . . push args
68/push ""/imm32
51/push-ECX
# . . call
e8/call slice-equal?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(EAX, 0, msg)
# . . push args
68/push "F - test-slice-equal-with-empty"/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-slice-equal-empty-with-empty:
# - slice-equal?(slice(""), "") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
68/push _test-slice-data-0/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-equal?(ECX, "")
# . . push args
68/push ""/imm32
51/push-ECX
# . . call
e8/call slice-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-equal-empty-with-empty"/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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
slice-starts-with?: # s : (address slice), head : (address string) -> EAX : boolean
# pseudocode
# lenh = head->length
# if (lenh > s->end - s->start) return false
# i = 0
# currs = s->start
# currp = head->data
# while i < lenh
# if (*currs != *currh) return false
# ++i
# ++currs
# ++currh
# return true
#
# registers:
# currs: ESI
# currh: EDI
# *currs: EAX
# *currh: EBX
# i: ECX
# lenh: EDX
#
# . 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
56/push-ESI
57/push-EDI
# ESI = s
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI
# ECX = s->end - s->start
8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 4/disp8 . # copy *(ESI+4) to ECX
2b/subtract 0/mod/indirect 6/rm32/ESI . . . 1/r32/ECX . . # subtract *ESI from ECX
# EDI = head
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 0xc/disp8 . # copy *(EBP+12) to EDI
# lenh/EDX = head->length
8b/copy 0/mod/indirect 7/rm32/EDI . . . 2/r32/EDX . . # copy *EDI to EDX
# if (lenh > s->end - s->start) return false
39/compare 3/mod/direct 2/rm32/EDX . . . 1/r32/ECX . . # compare EDX with ECX
7f/jump-if-greater $slice-starts-with?:false/disp8
# currs/ESI = s->start
8b/subtract 0/mod/indirect 6/rm32/ESI . . . 6/r32/ESI . . # copy *ESI to ESI
# currh/EDI = head->data
81 0/subop/add 3/mod/direct 7/rm32/EDI . . . . . 4/imm32 # add to EDI
# i/ECX = 0
31/xor 3/mod/direct 1/rm32/ECX . . . 1/r32/ECX . . # clear ECX
# EAX = EBX = 0
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
$slice-starts-with?:loop:
# if (i >= lenh) return true
39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX
7d/jump-if-greater-or-equal $slice-starts-with?:true/disp8
# AL = *currs
8a/copy-byte 0/mod/indirect 6/rm32/ESI . . . 0/r32/AL . . # copy byte at *ESI to AL
# BL = *currh
8a/copy-byte 0/mod/indirect 7/rm32/EDI . . . 3/r32/BL . . # copy byte at *EDI to BL
# if (*currs != *currh) return false
39/compare 3/mod/direct 0/rm32/EAX . . . 3/r32/EBX . . # compare EAX and EBX
75/jump-if-not-equal $slice-starts-with?:false/disp8
# ++i
41/increment-ECX
# ++currs
46/increment-ESI
# ++currh
47/increment-EDI
eb/jump $slice-starts-with?:loop/disp8
$slice-starts-with?:true:
b8/copy-to-EAX 1/imm32
eb/jump $slice-starts-with?:end/disp8
$slice-starts-with?:false:
b8/copy-to-EAX 0/imm32
$slice-starts-with?:end:
# . restore registers
5f/pop-to-EDI
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-slice-starts-with-single-character:
# - slice-starts-with?(slice("Abc"), "A") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
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-starts-with?(ECX, "A")
# . . push args
68/push "A"/imm32
51/push-ECX
# . . call
e8/call slice-starts-with?/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-starts-with-single-character"/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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
test-slice-starts-with-empty-string:
# - slice-starts-with?(slice("Abc"), "") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
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-starts-with?(ECX, "")
# . . push args
68/push ""/imm32
51/push-ECX
# . . call
e8/call slice-starts-with?/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-starts-with-empty-string"/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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
test-slice-starts-with-multiple-characters:
# - slice-starts-with?(slice("Abc"), "Ab") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
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-starts-with?(ECX, "Ab")
# . . push args
68/push "Ab"/imm32
51/push-ECX
# . . call
e8/call slice-starts-with?/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-starts-with-multiple-characters"/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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
test-slice-starts-with-entire-string:
# - slice-starts-with?(slice("Abc"), "Abc") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
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-starts-with?(ECX, "Abc")
# . . push args
68/push "Abc"/imm32
51/push-ECX
# . . call
e8/call slice-starts-with?/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-starts-with-entire-string"/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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
test-slice-starts-with-fails:
# - slice-starts-with?(slice("Abc"), "Abd") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
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-starts-with?(ECX, "Abd")
# . . push args
68/push "Abd"/imm32
51/push-ECX
# . . call
e8/call slice-starts-with?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(EAX, 0, msg)
# . . push args
68/push "F - test-slice-starts-with-fails"/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-slice-starts-with-fails-2:
# - slice-starts-with?(slice("Abc"), "Ac") == 1
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# var slice/ECX
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-starts-with?(ECX, "Ac")
# . . push args
68/push "Ac"/imm32
51/push-ECX
# . . call
e8/call slice-starts-with?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(EAX, 0, msg)
# . . push args
68/push "F - test-slice-starts-with-fails-2"/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
write-slice: # out : (address buffered-file), s : (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
52/push-EDX
53/push-EBX
56/push-ESI
57/push-EDI
# ESI = s
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI
# curr/ECX = s->start
8b/copy 0/mod/indirect 6/rm32/ESI . . . 1/r32/ECX . . # copy *ESI to ECX
# max/ESI = s->end
8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 6/r32/ESI 4/disp8 . # copy *(ESI+4) to ESI
# EDI = f
8b/copy 1/mod/*+disp8 5/rm32/EBP . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI
# EDX = f->length
8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 2/r32/EDX 0xc/disp8 . # copy *(EDI+12) to EDX
# EBX = f->write
8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy *(EDI+4) to EBX
$write-slice:loop:
# if (curr >= max) break
39/compare 3/mod/direct 1/rm32/ECX . . . 6/r32/ESI . . # compare ECX with ESI
7d/jump-if-greater-or-equal $write-slice:loop-end/disp8
# if (f->write >= f->length) flush and clear f's stream
39/compare 3/mod/direct 3/rm32/EBX . . . 2/r32/EDX . . # compare EBX with EDX
7c/jump-if-lesser $write-slice:to-stream/disp8
# . persist f->write
89/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy EBX to *(EDI+4)
# . flush(f)
# . . push args
57/push-EDI
# . . call
e8/call flush/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . clear-stream(stream = f+4)
# . . push args
8d/copy-address 1/mod/*+disp8 7/rm32/EDI . . . 0/r32/EAX 4/disp8 . # copy EDI+4 to EAX
50/push-EAX
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . f->write must now be 0; update its cache at EBX
31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
$write-slice:to-stream:
# f->data[f->write] = *in
# . AL = *in
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
# . f->data[f->write] = AL
88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/EDI 3/index/EBX . 0/r32/AL 0x10/disp8 . # copy AL to *(EDI+EBX+16)
# ++f->write
43/increment-EBX
# ++in
41/increment-ECX
eb/jump $write-slice:loop/disp8
$write-slice:loop-end:
# persist necessary variables from registers
89/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy EBX to *(EDI+4)
$write-slice:end:
# . restore registers
5f/pop-to-EDI
5e/pop-to-ESI
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
test-write-slice:
# . 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
# . clear-stream(_test-buffered-file+4)
# . . push args
b8/copy-to-EAX _test-buffered-file/imm32
05/add-to-EAX 4/imm32
50/push-EAX
# . . 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 = "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
# write-slice(_test-buffered-file, slice)
# . . push args
51/push-ECX
68/push _test-buffered-file/imm32
# . . call
e8/call write-slice/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# flush(_test-buffered-file)
# . . push args
68/push _test-buffered-file/imm32
# . . call
e8/call flush/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# check-stream-equal(_test-stream, "Abc", msg)
# . . push args
68/push "F - test-write-slice"/imm32
68/push "Abc"/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
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
# write an entire stream's contents to a buffered-file
# ways to do this:
# - construct a 'maximal slice' and pass it to write-slice
# - flush the buffered-file and pass the stream directly to its fd (disabling buffering)
# we'll go with the first way for now
write-stream-buffered: # f : (address buffered-file), s : (address stream)
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# . save registers
50/push-EAX
56/push-ESI
# ESI = s
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI
# var slice/ECX = {s->data, s->data + s->write}
# . push s->data + s->write
8b/copy 0/mod/indirect 6/rm32/ESI . . . 0/r32/EAX . . # copy *ESI to EAX
8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/ESI 0/index/EAX . 0/r32/EAX 0xc/disp8 . # copy ESI+EAX+12 to EAX
50/push-EAX
# . push s->data
8d/copy-address 1/mod/*+disp8 6/rm32/ESI . . . 0/r32/EAX 0xc/disp8 . # copy ESI+12 to EAX
50/push-EAX
# . ECX = ESP
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
# write-slice(f, slice)
# . . push args
51/push-ECX
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
# . . call
e8/call write-slice/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
$write-stream-buffered:end:
# . restore registers
5e/pop-to-ESI
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-write-stream-buffered:
# . 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
# . clear-stream(_test-buffered-file+4)
# . . push args
b8/copy-to-EAX _test-buffered-file/imm32
05/add-to-EAX 4/imm32
50/push-EAX
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . clear-stream(_test-tmp-stream)
# . . push args
68/push _test-tmp-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
# initialize input
# . write(_test-tmp-stream, "abcd")
# . . push args
68/push "abcd"/imm32
68/push _test-tmp-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# perform the write-stream-buffered
# . write-stream-buffered(_test-buffered-file, _test-tmp-stream)
# . . push args
68/push _test-tmp-stream/imm32
68/push _test-buffered-file/imm32
# . . call
e8/call write-stream-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check that the write happened as expected
# . flush(_test-buffered-file)
# . . push args
68/push _test-buffered-file/imm32
# . . call
e8/call flush/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . check-stream-equal(_test-stream, "abcd", msg)
# . . push args
68/push "F - test-write-stream-buffered"/imm32
68/push "abcd"/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
# . 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:
41/A
_test-slice-data-1:
62/b
_test-slice-data-2:
63/c
_test-slice-data-3:
64/d
_test-slice-data-4:
# . _. vim:nowrap:textwidth=0