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Another minor stylistic point: I try to use EDI for destination operands.
This commit is contained in:
Kartik Agaram 2019-05-04 14:28:48 -07:00
parent c4c30c7dc9
commit 85a3e39cd5
1 changed files with 7 additions and 7 deletions
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14
subx/074print-int-decimal.subx
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@ -41,7 +41,7 @@ print-int32-decimal: # out : (address stream), n : int32
50/push-EAX
51/push-ECX
52/push-EDX
53/push-EBX
57/push-EDI
# ten/ECX = 10
b9/copy-to-ECX 0xa/imm32
# push sentinel
@ -68,8 +68,8 @@ $print-int32-decimal:read-break:
7d/jump-if-greater-or-equal $print-int32-decimal:write/disp8
68/push 0x2d/imm32/-
$print-int32-decimal:write:
# EBX = out
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 3/r32/EBX 8/disp8 . # copy *(EBP+8) to EBX
# EDI = out
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI
$print-int32-decimal:write-loop:
# pop into EAX
58/pop-to-EAX
@ -78,17 +78,17 @@ $print-int32-decimal:write-loop:
74/jump-if-equal $print-int32-decimal:end/disp8
# out->data[out->write] = AL
# . ECX = out->write
8b/copy 0/mod/indirect 3/rm32/EBX . . . 1/r32/ECX . . # ECX = *EBX
8b/copy 0/mod/indirect 7/rm32/EDI . . . 1/r32/ECX . . # copy *EDI to ECX
# . ECX = &out->data[out->write]
8d/copy-address 1/mod/*+disp8 4/rm32/sib 3/base/EBX 1/index/ECX . 1/r32/ECX 0xc/disp8 . # copy EBX+ECX+12 to ECX
8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 1/index/ECX . 1/r32/ECX 0xc/disp8 . # copy EBX+ECX+12 to ECX
# . out->data[out->write] = AL
88/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy AL to byte at *ECX
# out->write++
ff 0/subop/increment 0/mod/indirect 3/rm32/EBX . . . . . . # increment *EBX
ff 0/subop/increment 0/mod/indirect 7/rm32/EDI . . . . . . # increment *EDI
eb/jump $print-int32-decimal:write-loop/disp8
$print-int32-decimal:end:
# . restore registers
5b/pop-to-EBX
5f/pop-to-EDI
5a/pop-to-EDX
59/pop-to-ECX
58/pop-to-EAX