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Thread: C to assembly

  1. Aug 3rd, 2001, 03:31 AM #1
    ChimpFace9000
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    Post C to assembly

    Im in the middle of making a graphics lib in assembly. I assemble it into an object file, and then i link it into my pascal program. I want a line function, but its in C. I feel like a shmuck asking this, but could some one convert it to asm for me? From what im told, its supposed to be the fastest line algo. Its attached...
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  2. Aug 10th, 2001, 06:03 PM #2
    gwdash
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    this is such a common function(Bresinhams Algorithm), i'm almost sure someone must have written in Assembly, i've seen it in C, Basic, etc.
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  3. Aug 10th, 2001, 06:39 PM #3
    ChimpFace9000
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    Its supposed to be a modified version of it. Faster, supposedly.
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  4. Aug 12th, 2001, 06:12 PM #4
    jim mcnamara
    Guest
    Assuming this is what you wanted
    Code:
    	TITLE	D:\ftp\breslin4.cpp
	.386P
include listing.inc
if @Version gt 510
.model FLAT
else
_TEXT	SEGMENT PARA USE32 PUBLIC 'CODE'
_TEXT	ENDS
_DATA	SEGMENT DWORD USE32 PUBLIC 'DATA'
_DATA	ENDS
CONST	SEGMENT DWORD USE32 PUBLIC 'CONST'
CONST	ENDS
_BSS	SEGMENT DWORD USE32 PUBLIC 'BSS'
_BSS	ENDS
$$SYMBOLS	SEGMENT BYTE USE32 'DEBSYM'
$$SYMBOLS	ENDS
$$TYPES	SEGMENT BYTE USE32 'DEBTYP'
$$TYPES	ENDS
_TLS	SEGMENT DWORD USE32 PUBLIC 'TLS'
_TLS	ENDS
;	COMDAT ?BresLine@@YAXHHHHE@Z
_TEXT	SEGMENT PARA USE32 PUBLIC 'CODE'
_TEXT	ENDS
FLAT	GROUP _DATA, CONST, _BSS
	ASSUME	CS: FLAT, DS: FLAT, SS: FLAT
endif
PUBLIC	?BresLine@@YAXHHHHE@Z				; BresLine
EXTRN	?FrameBuffer@@3PAEA:DWORD			; FrameBuffer
EXTRN	?WIDTH@@3HA:DWORD				; WIDTH
;	COMDAT ?BresLine@@YAXHHHHE@Z
_TEXT	SEGMENT
_Ax$ = 8
_Ay$ = 12
_Bx$ = 16
_By$ = 20
_Color$ = 24
_dX$ = -4
_dY$ = -8
_fbXincr$ = -12
_fbYincr$ = -16
_fbXYincr$ = -20
_dPr$ = -24
_dPru$ = -28
_P$ = -32
_AfbAddr$ = -36
_BfbAddr$ = -40
?BresLine@@YAXHHHHE@Z PROC NEAR				; BresLine, COMDAT
; File d:\ftp\breslin4.cpp
; Line 18
	push	ebp
	mov	ebp, esp
	sub	esp, 104				; 00000068H
	push	ebx
	push	esi
	push	edi
; Line 24
	mov	eax, DWORD PTR _Ay$[ebp]
	imul	eax, DWORD PTR ?WIDTH@@3HA		; WIDTH
	add	eax, DWORD PTR _Ax$[ebp]
	mov	ecx, DWORD PTR ?FrameBuffer@@3PAEA	; FrameBuffer
	add	ecx, eax
	mov	DWORD PTR _AfbAddr$[ebp], ecx
; Line 25
	mov	edx, DWORD PTR _By$[ebp]
	imul	edx, DWORD PTR ?WIDTH@@3HA		; WIDTH
	add	edx, DWORD PTR _Bx$[ebp]
	mov	eax, DWORD PTR ?FrameBuffer@@3PAEA	; FrameBuffer
	add	eax, edx
	mov	DWORD PTR _BfbAddr$[ebp], eax
; Line 31
	mov	DWORD PTR _fbXincr$[ebp], 1
; Line 32
	mov	ecx, DWORD PTR _Bx$[ebp]
	sub	ecx, DWORD PTR _Ax$[ebp]
	mov	DWORD PTR _dX$[ebp], ecx
	cmp	DWORD PTR _dX$[ebp], 0
	jl	SHORT $L284
	jmp	$L286
$L284:
; Line 33
	mov	edx, DWORD PTR _dX$[ebp]
	neg	edx
	mov	DWORD PTR _dX$[ebp], edx
; Line 34
	mov	DWORD PTR _fbXincr$[ebp], -1
$AFTERNEGX$285:
; Line 37
	mov	eax, DWORD PTR ?WIDTH@@3HA		; WIDTH
	mov	DWORD PTR _fbYincr$[ebp], eax
; Line 38
	mov	ecx, DWORD PTR _By$[ebp]
	sub	ecx, DWORD PTR _Ay$[ebp]
	mov	DWORD PTR _dY$[ebp], ecx
	cmp	DWORD PTR _dY$[ebp], 0
	jl	SHORT $L287
	jmp	$L289
$L287:
; Line 39
	mov	edx, DWORD PTR ?WIDTH@@3HA		; WIDTH
	neg	edx
	mov	DWORD PTR _fbYincr$[ebp], edx
; Line 40
	mov	eax, DWORD PTR _dY$[ebp]
	neg	eax
	mov	DWORD PTR _dY$[ebp], eax
$AFTERNEGY$288:
; Line 43
	mov	ecx, DWORD PTR _fbXincr$[ebp]
	add	ecx, DWORD PTR _fbYincr$[ebp]
	mov	DWORD PTR _fbXYincr$[ebp], ecx
; Line 50
	mov	edx, DWORD PTR _dY$[ebp]
	cmp	edx, DWORD PTR _dX$[ebp]
	jle	SHORT $L290
	jmp	$L292
$L290:
; Line 53
	mov	eax, DWORD PTR _dY$[ebp]
	add	eax, DWORD PTR _dY$[ebp]
	mov	DWORD PTR _dPr$[ebp], eax
; Line 54
	mov	ecx, DWORD PTR _dX$[ebp]
	neg	ecx
	mov	DWORD PTR _P$[ebp], ecx
; Line 55
	mov	edx, DWORD PTR _P$[ebp]
	add	edx, DWORD PTR _P$[ebp]
	mov	DWORD PTR _dPru$[ebp], edx
; Line 56
	mov	eax, DWORD PTR _dX$[ebp]
	sar	eax, 1
	mov	DWORD PTR _dY$[ebp], eax
$XLOOP$293:
; Line 58
	mov	ecx, DWORD PTR _AfbAddr$[ebp]
	mov	dl, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [ecx], dl
; Line 59
	mov	eax, DWORD PTR _BfbAddr$[ebp]
	mov	cl, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [eax], cl
; Line 60
	mov	edx, DWORD PTR _P$[ebp]
	add	edx, DWORD PTR _dPr$[ebp]
	mov	DWORD PTR _P$[ebp], edx
	cmp	DWORD PTR _P$[ebp], 0
	jle	SHORT $L294
	jmp	$L296
$L294:
; Line 62
	mov	eax, DWORD PTR _AfbAddr$[ebp]
	add	eax, DWORD PTR _fbXincr$[ebp]
	mov	DWORD PTR _AfbAddr$[ebp], eax
; Line 63
	mov	ecx, DWORD PTR _BfbAddr$[ebp]
	sub	ecx, DWORD PTR _fbXincr$[ebp]
	mov	DWORD PTR _BfbAddr$[ebp], ecx
; Line 64
	mov	edx, DWORD PTR _dY$[ebp]
	sub	edx, 1
	mov	DWORD PTR _dY$[ebp], edx
	cmp	DWORD PTR _dY$[ebp], 0
	jle	SHORT $L297
	jmp	SHORT $XLOOP$293
$L297:
; Line 65
	mov	eax, DWORD PTR _AfbAddr$[ebp]
	mov	cl, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [eax], cl
; Line 66
	mov	edx, DWORD PTR _dX$[ebp]
	and	edx, 1
	test	edx, edx
	jne	SHORT $L298
	jmp	$L273
$L298:
; Line 67
	mov	eax, DWORD PTR _BfbAddr$[ebp]
	mov	cl, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [eax], cl
; Line 68
	jmp	$L273
$RightAndUp$295:
; Line 70
	mov	edx, DWORD PTR _AfbAddr$[ebp]
	add	edx, DWORD PTR _fbXYincr$[ebp]
	mov	DWORD PTR _AfbAddr$[ebp], edx
; Line 71
	mov	eax, DWORD PTR _BfbAddr$[ebp]
	sub	eax, DWORD PTR _fbXYincr$[ebp]
	mov	DWORD PTR _BfbAddr$[ebp], eax
; Line 72
	mov	ecx, DWORD PTR _P$[ebp]
	add	ecx, DWORD PTR _dPru$[ebp]
	mov	DWORD PTR _P$[ebp], ecx
; Line 73
	mov	edx, DWORD PTR _dY$[ebp]
	sub	edx, 1
	mov	DWORD PTR _dY$[ebp], edx
	cmp	DWORD PTR _dY$[ebp], 0
	jle	SHORT $L299
	jmp	$XLOOP$293
$L299:
; Line 74
	mov	eax, DWORD PTR _AfbAddr$[ebp]
	mov	cl, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [eax], cl
; Line 75
	mov	edx, DWORD PTR _dX$[ebp]
	and	edx, 1
	test	edx, edx
	jne	SHORT $L300
	jmp	$L273
$L300:
; Line 76
	mov	eax, DWORD PTR _BfbAddr$[ebp]
	mov	cl, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [eax], cl
; Line 77
	jmp	$L273
$YisIndependent$291:
; Line 80
	mov	edx, DWORD PTR _dX$[ebp]
	add	edx, DWORD PTR _dX$[ebp]
	mov	DWORD PTR _dPr$[ebp], edx
; Line 81
	mov	eax, DWORD PTR _dY$[ebp]
	neg	eax
	mov	DWORD PTR _P$[ebp], eax
; Line 82
	mov	ecx, DWORD PTR _P$[ebp]
	add	ecx, DWORD PTR _P$[ebp]
	mov	DWORD PTR _dPru$[ebp], ecx
; Line 83
	mov	edx, DWORD PTR _dY$[ebp]
	sar	edx, 1
	mov	DWORD PTR _dX$[ebp], edx
$YLOOP$301:
; Line 85
	mov	eax, DWORD PTR _AfbAddr$[ebp]
	mov	cl, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [eax], cl
; Line 86
	mov	edx, DWORD PTR _BfbAddr$[ebp]
	mov	al, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [edx], al
; Line 87
	mov	ecx, DWORD PTR _P$[ebp]
	add	ecx, DWORD PTR _dPr$[ebp]
	mov	DWORD PTR _P$[ebp], ecx
	cmp	DWORD PTR _P$[ebp], 0
	jle	SHORT $L302
	jmp	$L304
$L302:
; Line 89
	mov	edx, DWORD PTR _AfbAddr$[ebp]
	add	edx, DWORD PTR _fbYincr$[ebp]
	mov	DWORD PTR _AfbAddr$[ebp], edx
; Line 90
	mov	eax, DWORD PTR _BfbAddr$[ebp]
	sub	eax, DWORD PTR _fbYincr$[ebp]
	mov	DWORD PTR _BfbAddr$[ebp], eax
; Line 91
	mov	ecx, DWORD PTR _dX$[ebp]
	sub	ecx, 1
	mov	DWORD PTR _dX$[ebp], ecx
	cmp	DWORD PTR _dX$[ebp], 0
	jle	SHORT $L305
	jmp	SHORT $YLOOP$301
$L305:
; Line 92
	mov	edx, DWORD PTR _AfbAddr$[ebp]
	mov	al, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [edx], al
; Line 93
	mov	ecx, DWORD PTR _dY$[ebp]
	and	ecx, 1
	test	ecx, ecx
	jne	SHORT $L306
	jmp	SHORT $L273
$L306:
; Line 94
	mov	edx, DWORD PTR _BfbAddr$[ebp]
	mov	al, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [edx], al
; Line 95
	jmp	SHORT $L273
$RightAndUp2$303:
; Line 97
	mov	ecx, DWORD PTR _AfbAddr$[ebp]
	add	ecx, DWORD PTR _fbXYincr$[ebp]
	mov	DWORD PTR _AfbAddr$[ebp], ecx
; Line 98
	mov	edx, DWORD PTR _BfbAddr$[ebp]
	sub	edx, DWORD PTR _fbXYincr$[ebp]
	mov	DWORD PTR _BfbAddr$[ebp], edx
; Line 99
	mov	eax, DWORD PTR _P$[ebp]
	add	eax, DWORD PTR _dPru$[ebp]
	mov	DWORD PTR _P$[ebp], eax
; Line 100
	mov	ecx, DWORD PTR _dX$[ebp]
	sub	ecx, 1
	mov	DWORD PTR _dX$[ebp], ecx
	cmp	DWORD PTR _dX$[ebp], 0
	jle	SHORT $L307
	jmp	$YLOOP$301
$L307:
; Line 101
	mov	edx, DWORD PTR _AfbAddr$[ebp]
	mov	al, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [edx], al
; Line 102
	mov	ecx, DWORD PTR _dY$[ebp]
	and	ecx, 1
	test	ecx, ecx
	jne	SHORT $L308
	jmp	SHORT $L273
$L308:
; Line 103
	mov	edx, DWORD PTR _BfbAddr$[ebp]
	mov	al, BYTE PTR _Color$[ebp]
	mov	BYTE PTR [edx], al
; Line 104
	jmp	SHORT $L273
$L304:
; Line 105
	jmp	SHORT $RightAndUp2$303
$L296:
	jmp	$RightAndUp$295
$L292:
	jmp	$YisIndependent$291
$L289:
	jmp	$AFTERNEGY$288
$L286:
	jmp	$AFTERNEGX$285
$L273:
	pop	edi
	pop	esi
	pop	ebx
	mov	esp, ebp
	pop	ebp
	ret	0
?BresLine@@YAXHHHHE@Z ENDP				; BresLine
_TEXT	ENDS
END
    oooops - dunno how to can the smilies. sorry
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