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This commit is contained in:
Kartik Agaram 2018-10-10 21:37:57 -07:00
parent a0467aa202
commit 7c39778633
1 changed files with 33 additions and 1 deletions
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34
subx/055trace.subx
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@ -115,6 +115,9 @@ trace: # t : (address trace-stream), line : string
8b/copy 0/mod/indirect 0/rm32/EAX . . . 2/r32/EDX . . # copy *EAX to EDX
# ESI = line.length
8b/copy 0/mod/indirect 3/rm32/EBX . . . 6/r32/ESI . . # copy *EBX to ESI
# if ESI == 0 return
81 7/subop/compare 3/mod/direct 6/rm32/ESI . . . . . 0/imm32 # compare ESI
74/jump-if-equal $trace:end/disp8
# t.write += line.length
01/add 0/mod/indirect 0/rm32/EAX . . . 6/r32/ESI . . # add ESI to *EAX
# t.write++ (for the newline we'll append below)
@ -142,7 +145,6 @@ $trace:loop:
eb/jump $trace:loop/disp8
$trace:break:
# finally, append a newline
# todo: don't append a newline if 'line' is empty
# if EAX >= ECX return
39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX with ECX
7d/jump-if-greater-or-equal $trace:end/disp8
@ -267,4 +269,34 @@ test-trace-appends:
# done
c3/return
test-trace-empty-line:
# clear-trace-stream(Test-trace-stream)
# push args
68/push Test-trace-stream/imm32
# call
e8/call clear-trace-stream/disp32
# discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# trace(Test-trace-stream, "")
# push args
68/push ""/imm32
68/push Test-trace-stream/imm32
# call
e8/call trace/disp32
# discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# check-ints-equal(*Test-trace-stream.data, 0, msg)
# push args
68/push "F - test-trace-empty-line"/imm32
68/push 0/imm32
# push *Test-trace-stream.data
b8/copy-to-EAX Test-trace-stream/imm32
ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12)
# call
e8/call check-ints-equal/disp32
# discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
# done
c3/return
# vim:nowrap:textwidth=0