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Fixed bug #15 SDL_blit_A.mmx-speed.patch.txt -- Speed improvements and a bugfix for the current GCC inline mmx asm code: - Changed some ops and removed some resulting useless ones. - Added some instruction parallelism (some gain) The resulting speed on my Xeon improved upto 35% depending on the function (measured in fps). - Fixed a bug where BlitRGBtoRGBSurfaceAlphaMMX() was setting the alpha component on the destination surfaces (to opaque-alpha) even when the surface had none. SDL_blit_A.mmx-msvc.patch.txt -- MSVC mmx intrinsics version of the same GCC asm code. MSVC compiler tries to parallelize the code and to avoid register stalls, but does not always do a very good job. Per-surface blending MSVC functions run quite a bit faster than their pure-asm counterparts (upto 55% faster for 16bit ones), but the per-pixel blending runs somewhat slower than asm. - BlitRGBtoRGBSurfaceAlphaMMX and BlitRGBtoRGBPixelAlphaMMX (and all variants) can now also handle formats other than (A)RGB8888. Formats like RGBA8888 and some quite exotic ones are allowed -- like RAGB8888, or actually anything having channels aligned on 8bit boundary and full 8bit alpha (for per-pixel alpha blending). The performance cost of this change is virtually 0 for per-surface alpha blending (no extra ops inside the loop) and a single non-MMX op inside the loop for per-pixel blending. In testing, the per-pixel alpha blending takes a ~2% performance hit, but it still runs much faster than the current code in CVS. If necessary, a separate function with this functionality can be made. This code requires Processor Pack for VC6.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 15 Mar 2006 15:39:29 +0000
parents d910939febfa
children 782fd950bd46 a1b03ba2fcd0
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/*
 * GSXB audio definitions
 * 
 * Patrice Mandin
 */

#ifndef _SDL_mintaudio_gsxb_h
#define _SDL_mintaudio_gsxb_h

#include <mint/falcon.h>	/* for trap_14_xxx macros */

/* GSXB Cookie */

#define C_GSXB		0x47535842L

/* Bit 5 in cookie _SND */

#define SND_GSXB	(1<<5)

/* NSoundcmd modes */

#define SETRATE			7	/* Set sample rate */
#define SET8BITFORMAT	8	/* 8 bits format */
#define SET16BITFORMAT	9	/* 16 bits format */
#define SET24BITFORMAT	10	/* 24 bits format */
#define SET32BITFORMAT	11	/* 32 bits format */
#define LTATTEN_MASTER	12	/* Attenuation */
#define RTATTEN_MASTER	13
#define LTATTEN_MICIN	14
#define RTATTEN_MICIN	15
#define LTATTEN_FMGEN	16
#define RTATTEN_FMGEN	17
#define LTATTEN_LINEIN	18
#define RTATTEN_LINEIN	19
#define LTATTEN_CDIN	20
#define RTATTEN_CDIN	21
#define LTATTEN_VIDIN	22
#define RTATTEN_VIDIN	23
#define LTATTEN_AUXIN	24
#define RTATTEN_AUXIN	25

/* Setmode modes */

#define MONO16		3
#define STEREO24	4
#define STEREO32	5
#define MONO24		6
#define MONO32		7

/* Sndstatus modes */

#define SND_QUERYFORMATS	2
#define SND_QUERYMIXERS		3
#define SND_QUERYSOURCES	4
#define SND_QUERYDUPLEX		5
#define SND_QUERY8BIT		8
#define SND_QUERY16BIT		9
#define SND_QUERY24BIT		10
#define SND_QUERY32BIT		11

#define SND_FORMAT8		(1<<0)
#define SND_FORMAT16	(1<<1)
#define SND_FORMAT24	(1<<2)
#define SND_FORMAT32	(1<<3)

#define SND_FORMATSIGNED		(1<<0)
#define SND_FORMATUNSIGNED		(1<<1)
#define SND_FORMATBIGENDIAN		(1<<2)
#define SND_FORMATLITTLEENDIAN	(1<<3)

/* Devconnect prescalers */

#define CLK_44K		1
#define CLK_22K		3
#define CLK_11K		7

/* Extra xbios functions */

#define NSoundcmd(mode,data,data2)	\
	(long)trap_14_wwl((short)130,(short)(mode),(short)(data),(long)(data2))
#define NSetinterrupt(src_inter,cause,inth_addr)	\
	(long)trap_14_wwwl((short)135,(short)(src_inter),(short)(cause),	\
		(long)(inth_addr))

#endif /* _SDL_mintaudio_gsxb_h */