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/* $XFree86: xc/programs/Xserver/hw/xfree86/vgafb/enhanced/fLineV.s,v 1.1.2.1 1997/07/16 10:37:05 hohndel Exp $ */
/* Copyright 1992 by James Tsillas, Arlington, Massachusetts.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation.
JAMES TSILLAS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
EVENT SHALL DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
*/
/* $XConsortium: fLineV.s /main/5 1996/02/21 18:08:57 kaleb $ */
#include "assyntax.h"
#include "vgaAsm.h"
FILE("fLineV.s")
AS_BEGIN
#define rop REGOFF(8,EBP)
#define andv BL
#define xorv BH
#define pdst EDI
#define nlwidth ESI
#define x1 REGOFF(28,EBP)
#define y1 REGOFF(32,EBP)
#define len REGOFF(36,EBP)
#define len0 ECX
#define tmp EAX
#define GXcopy CONST(3)
#define GXxor CONST(6)
SEG_TEXT
GLOBL GLNAME(fastvga256VertS)
ALIGNTEXT4
GLNAME(fastvga256VertS):
PUSH_L (EBP)
MOV_L (ESP,EBP)
PUSH_L (EBX)
PUSH_L (ESI)
PUSH_L (EDI)
MOV_B (REGOFF(12,EBP),andv)
MOV_B (REGOFF(16,EBP),xorv)
MOV_L (REGOFF(20,EBP),pdst)
MOV_L (REGOFF(24,EBP),nlwidth)
SHL_L (CONST(2),nlwidth)
MOV_L (y1,tmp)
IMUL_L (nlwidth,tmp)
ADD_L (x1,tmp)
ADD_L (tmp,pdst)
MOV_L (pdst,REGOFF(20,EBP))
CMP_L (GXcopy,rop)
JNE (.GXxorloop)
.GXcopyloop:
CMP_L (VGABASE,pdst)
JB (.nocheckC)
ALIGNTEXT4ifNOP
.checkC:
PUSH_L (REGOFF(20,EBP))
CALL (GLNAME(vgaSetWrite))
MOV_L (tmp,pdst)
ADD_L (CONST(4),ESP)
MOV_L (CONTENT(GLNAME(vgaWriteTop)),tmp)
SUB_L (pdst,tmp)
XOR_L (EDX,EDX)
DIV_L (nlwidth)
OR_L (tmp,tmp)
JZ (.L3)
CMP_L (len,tmp)
JAE (.nocheckC)
MOV_L (tmp,len0)
SUB_L (len0,len)
IMUL_L (nlwidth,tmp)
ADD_L (tmp,REGOFF(20,EBP))
.L1: MOV_B (xorv,REGIND(pdst))
ADD_L (nlwidth,pdst)
DEC_L (ECX)
JNZ (.L1) /* len0 is %ecx */
CMP_L (CONTENT(GLNAME(vgaWriteTop)),pdst)
JAE (.checkC)
.L3: MOV_B (xorv,REGIND(pdst))
DEC_L (len)
JZ (.allfinish)
ADD_L (nlwidth,REGOFF(20,EBP))
JMP (.checkC)
ALIGNTEXT4
.nocheckC:
CMP_L (CONST(0),len)
JZ (.allfinish)
MOV_L (len,len0)
CMP_L (CONST(8),ECX)
JB (.L2)
/* Unrolled loop */
.L10: MOV_B (xorv,REGIND(pdst)) /* line 0 */
MOV_B (xorv,REGBI(pdst,nlwidth)) /* line 1 */
MOV_B (xorv,REGBISD(pdst,nlwidth,2,0)) /* line 2 */
MOV_B (xorv,REGBISD(pdst,nlwidth,4,0)) /* line 4 */
ADD_L (nlwidth,pdst)
MOV_B (xorv,REGBISD(pdst,nlwidth,2,0)) /* line 3 */
MOV_B (xorv,REGBISD(pdst,nlwidth,4,0)) /* line 5 */
ADD_L (nlwidth,pdst)
MOV_B (xorv,REGBISD(pdst,nlwidth,4,0)) /* line 6 */
ADD_L (nlwidth,pdst)
LEA_L (REGBISD(pdst,nlwidth,4,0),pdst)
MOV_B (xorv,REGIND(pdst)) /* line 7 */
ADD_L (nlwidth,pdst)
SUB_L (CONST(8),ECX)
JZ (.allfinish)
CMP_L (CONST(8),ECX)
JAE (.L10)
.L2: MOV_B (xorv,REGIND(pdst))
ADD_L (nlwidth,pdst)
DEC_L (ECX)
JNZ (.L2) /* len0 is %ecx */
.allfinish:
POP_L (EDI)
POP_L (ESI)
POP_L (EBX)
LEAVE
RET
.GXxorloop:
CMP_L (GXxor,rop)
JNE (.GXsetloop)
CMP_L (VGABASE,pdst)
JB (.nocheckX)
ALIGNTEXT4ifNOP
.checkX:
PUSH_L (REGOFF(20,EBP))
CALL (GLNAME(vgaSetReadWrite))
MOV_L (tmp,pdst)
ADD_L (CONST(4),ESP)
MOV_L (CONTENT(GLNAME(vgaWriteTop)),tmp)
SUB_L (pdst,tmp)
XOR_L (EDX,EDX)
DIV_L (nlwidth)
OR_L (tmp,tmp)
JZ (.L6)
CMP_L (len,tmp)
JAE (.nocheckX)
MOV_L (tmp,len0)
SUB_L (len0,len)
IMUL_L (nlwidth,tmp)
ADD_L (tmp,REGOFF(20,EBP))
.L4: XOR_B (xorv,REGIND(pdst))
ADD_L (nlwidth,pdst)
DEC_L (ECX)
JNZ (.L4) /* len0 is %ecx */
CMP_L (CONTENT(GLNAME(vgaWriteTop)),pdst)
JAE (.checkX)
.L6: XOR_B (xorv,REGIND(pdst))
DEC_L (len)
JZ (.allfinish)
ADD_L (nlwidth,REGOFF(20,EBP))
JMP (.checkX)
ALIGNTEXT4
.nocheckX:
CMP_L (CONST(0),len)
JZ (.allfinish)
MOV_L (len,len0)
.L5: XOR_B (xorv,REGIND(pdst))
ADD_L (nlwidth,pdst)
DEC_L (ECX)
JNZ (.L5) /* len0 is %ecx */
JMP (.allfinish)
.GXsetloop:
CMP_L (VGABASE,pdst)
JB (.nocheckS)
ALIGNTEXT4ifNOP
.checkS:
PUSH_L (REGOFF(20,EBP))
CALL (GLNAME(vgaSetReadWrite))
MOV_L (tmp,pdst)
ADD_L (CONST(4),ESP)
MOV_L (CONTENT(GLNAME(vgaWriteTop)),tmp)
SUB_L (pdst,tmp)
XOR_L (EDX,EDX)
DIV_L (nlwidth)
OR_L (tmp,tmp)
JZ (.L9)
CMP_L (len,tmp)
JAE (.nocheckS)
MOV_L (tmp,len0)
SUB_L (len0,len)
IMUL_L (nlwidth,tmp)
ADD_L (tmp,REGOFF(20,EBP))
.L7: MOV_B (REGIND(pdst),AL)
AND_B (andv,AL)
XOR_B (xorv,AL)
MOV_B (AL,REGIND(pdst))
ADD_L (nlwidth,pdst)
DEC_L (ECX)
JNZ (.L7) /* len0 is %ecx */
CMP_L (CONTENT(GLNAME(vgaWriteTop)),pdst)
JAE (.checkS)
.L9: MOV_B (REGIND(pdst),AL)
AND_B (andv,AL)
XOR_B (xorv,AL)
MOV_B (AL,REGIND(pdst))
DEC_L (len)
JZ (.allfinish)
ADD_L (nlwidth,REGOFF(20,EBP))
JMP (.checkS)
ALIGNTEXT4
.nocheckS:
CMP_L (CONST(0),len)
JZ (.allfinish)
MOV_L (len,len0)
.L8: MOV_B (REGIND(pdst),AL)
AND_B (andv,AL)
XOR_B (xorv,AL)
MOV_B (AL,REGIND(pdst))
ADD_L (nlwidth,pdst)
DEC_L (ECX)
JNZ (.L8) /* len0 is %ecx */
JMP (.allfinish)
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