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convention: source arg in ESI

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I _think_ we'll need to use it below. But may be wrong.
This commit is contained in:
Kartik Agaram 2019-05-19 23:47:21 -07:00
parent 60cb2b4b81
commit a22f139556
2 changed files with 15 additions and 8 deletions
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@ -1270,6 +1270,7 @@ test-emit-string-literal-data-handles-escape-sequences:
# emit everything from a word except the initial datum
emit-metadata: # out : (address buffered-file), word : (address slice)
# pseudocode
# var slice = {0, word->end}
# curr = word->start
# while true
# if curr == word->end
@ -1277,7 +1278,9 @@ emit-metadata: # out : (address buffered-file), word : (address slice)
# if *curr == '/'
# break
# ++curr
# write-slice-buffered(out, slice{curr, word->end})
# slice->curr = curr
# write-slice-buffered(out, slice)
#
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
@ -1285,20 +1288,22 @@ emit-metadata: # out : (address buffered-file), word : (address slice)
50/push-EAX
51/push-ECX
52/push-EDX
# ECX = word
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 0xc/disp8 . # copy *(EBP+12) to ECX
# end/EDX = word->end
8b/copy 1/mod/*+disp8 1/rm32/ECX . . . 2/r32/EDX 4/disp8 . # copy *(ECX+4) to EDX
53/push-EBX
56/push-ESI
# ESI = word
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI
# curr/ECX = word->start
8b/copy 0/mod/indirect 1/rm32/ECX . . . 1/r32/ECX . . # copy *ECX to ECX
# clear out EAX
8b/copy 0/mod/indirect 6/rm32/ESI . . . 1/r32/ECX . . # copy *ESI to ECX
# end/EDX = word->end
8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 2/r32/EDX 4/disp8 . # copy *(ESI+4) to EDX
# EAX = 0
b8/copy-to-EAX 0/imm32
$emit-metadata:skip-datum-loop:
# if (curr == end) return
39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX and EDX
74/jump-if-equal $emit-metadata:end/disp8
# if (*curr == '/') break
8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/EAX . . # copy *ECX to EAX
8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
3d/compare-EAX-and 0x2f/imm32
74/jump-if-equal $emit-metadata:break/disp8
# ++curr
@ -1318,6 +1323,8 @@ $emit-metadata:break:
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . 0x10/imm32 . # add to ESP
$emit-metadata:end:
# . restore registers
5e/pop-to-ESI
5b/pop-to-EBX
5a/pop-to-EDX
59/pop-to-ECX
58/pop-to-EAX