xserver and mesa git update 28-12-2010

1 files changed, 1038 insertions, 916 deletions

diff --git a/mesalib/src/mesa/drivers/dri/common/spantmp2.h b/mesalib/src/mesa/drivers/dri/common/spantmp2.h
index 1dab7336b..160836a77 100644
--- a/mesalib/src/mesa/drivers/dri/common/spantmp2.h
+++ b/mesalib/src/mesa/drivers/dri/common/spantmp2.h
@@ -1,916 +1,1038 @@
-/*
- * Copyright 2000-2001 VA Linux Systems, Inc.
- * (C) Copyright IBM Corporation 2004
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * on the rights to use, copy, modify, merge, publish, distribute, sub
- * license, and/or sell copies of the Software, and to permit persons to whom
- * the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
- * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/**
- * \file spantmp2.h
- *
- * Template file of span read / write functions.
- *
- * \author Keith Whitwell <keithw@tungstengraphics.com>
- * \author Gareth Hughes <gareth@nvidia.com>
- * \author Ian Romanick <idr@us.ibm.com>
- */
-
-#include "main/colormac.h"
-#include "spantmp_common.h"
-
-#ifndef DBG
-#define DBG 0
-#endif
-
-#ifndef HW_READ_CLIPLOOP
-#define HW_READ_CLIPLOOP()	HW_CLIPLOOP()
-#endif
-
-#ifndef HW_WRITE_CLIPLOOP
-#define HW_WRITE_CLIPLOOP()	HW_CLIPLOOP()
-#endif
-
-#if (SPANTMP_PIXEL_FMT == GL_RGB)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)
-
-/**
- ** GL_RGB, GL_UNSIGNED_SHORT_5_6_5
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-#define INIT_MONO_PIXEL(p, color) \
-  p = PACK_COLOR_565( color[0], color[1], color[2] )
-
-#define WRITE_RGBA( _x, _y, r, g, b, a )				\
-   PUT_VALUE(_x, _y, ((((int)r & 0xf8) << 8) |				\
-		      (((int)g & 0xfc) << 3) |				\
-		      (((int)b & 0xf8) >> 3)))				\
-
-#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)
-
-#define READ_RGBA( rgba, _x, _y )					\
-   do {									\
-      GLushort p = GET_VALUE(_x, _y);					\
-      rgba[0] = ((p >> 8) & 0xf8) * 255 / 0xf8;				\
-      rgba[1] = ((p >> 3) & 0xfc) * 255 / 0xfc;				\
-      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\
-      rgba[3] = 0xff;							\
-   } while (0)
-
-#elif (SPANTMP_PIXEL_FMT == GL_RGB)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5_REV)
-
-/**
- ** GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-#define INIT_MONO_PIXEL(p, color) \
-  p = PACK_COLOR_565_REV( color[0], color[1], color[2] )
-
-#define WRITE_RGBA( _x, _y, r, g, b, a )				\
-   PUT_VALUE(_x, _y, PACK_COLOR_565_REV( r, g, b ))
-
-#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)
-
-#define READ_RGBA( rgba, _x, _y )					\
-   do {									\
-      GLushort p = GET_VALUE(_x, _y);					\
-      p = p << 8 | p >> 8;						\
-      rgba[0] = ((p >> 8) & 0xf8) * 255 / 0xf8;				\
-      rgba[1] = ((p >> 3) & 0xfc) * 255 / 0xfc;				\
-      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\
-      rgba[3] = 0xff;							\
-   } while (0)
-
-#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_4_4_4_4)
-
-/**
- ** GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-#define INIT_MONO_PIXEL(p, color) \
-   p = PACK_COLOR_4444_REV(color[3], color[0], color[1], color[2])
-
-#define WRITE_RGBA( _x, _y, r, g, b, a )				\
-   PUT_VALUE(_x, _y, PACK_COLOR_4444_REV(a, r, g, b))			\
-
-#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)
-
-#define READ_RGBA( rgba, _x, _y )					\
-   do {									\
-      GLushort p = GET_VALUE(_x, _y);					\
-      rgba[0] = ((p >> 0) & 0xf) * 0x11;				\
-      rgba[1] = ((p >> 12) & 0xf) * 0x11;				\
-      rgba[2] = ((p >> 4) & 0xf) * 0x11;				\
-      rgba[3] = ((p >> 8) & 0xf) * 0x11;				\
-   } while (0)
-
-
-#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_4_4_4_4_REV)
-
-/**
- ** GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-#define INIT_MONO_PIXEL(p, color) \
-   p = PACK_COLOR_4444(color[3], color[0], color[1], color[2])
-
-#define WRITE_RGBA( _x, _y, r, g, b, a )				\
-   PUT_VALUE(_x, _y, PACK_COLOR_4444(a, r, g, b))			\
-
-#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)
-
-#define READ_RGBA( rgba, _x, _y )					\
-   do {									\
-      GLushort p = GET_VALUE(_x, _y);					\
-      rgba[0] = ((p >> 8) & 0xf) * 0x11;				\
-      rgba[1] = ((p >> 4) & 0xf) * 0x11;				\
-      rgba[2] = ((p >> 0) & 0xf) * 0x11;				\
-      rgba[3] = ((p >> 12) & 0xf) * 0x11;				\
-   } while (0)
-
-
-#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_1_5_5_5_REV)
-
-/**
- ** GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-#define INIT_MONO_PIXEL(p, color) \
-   p = PACK_COLOR_1555(color[3], color[0], color[1], color[2])
-
-#define WRITE_RGBA( _x, _y, r, g, b, a )				\
-   PUT_VALUE(_x, _y, PACK_COLOR_1555(a, r, g, b))			\
-
-#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)
-
-#define READ_RGBA( rgba, _x, _y )					\
-   do {									\
-      GLushort p = GET_VALUE(_x, _y);					\
-      rgba[0] = ((p >> 7) & 0xf8) * 255 / 0xf8;				\
-      rgba[1] = ((p >> 2) & 0xf8) * 255 / 0xf8;				\
-      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\
-      rgba[3] = ((p >> 15) & 0x1) * 0xff;				\
-   } while (0)
-
-#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_1_5_5_5)
-
-/**
- ** GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-#define INIT_MONO_PIXEL(p, color) \
-   p = PACK_COLOR_1555_REV(color[3], color[0], color[1], color[2])
-
-#define WRITE_RGBA( _x, _y, r, g, b, a )				\
-   PUT_VALUE(_x, _y, PACK_COLOR_1555_REV(a, r, g, b))			\
-
-#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)
-
-#define READ_RGBA( rgba, _x, _y )					\
-   do {									\
-      GLushort p = GET_VALUE(_x, _y);					\
-      p = p << 8 | p >> 8;						\
-      rgba[0] = ((p >> 7) & 0xf8) * 255 / 0xf8;				\
-      rgba[1] = ((p >> 2) & 0xf8) * 255 / 0xf8;				\
-      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\
-      rgba[3] = ((p >> 15) & 0x1) * 0xff;				\
-   } while (0)
-
-#elif (SPANTMP_PIXEL_FMT == GL_BGRA) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
-
-/**
- ** GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-# define INIT_MONO_PIXEL(p, color)                       \
-     p = PACK_COLOR_8888(color[3], color[0], color[1], color[2]) 
-
-# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \
-   PUT_VALUE(_x, _y, ((r << 16) |					\
-		      (g << 8) |					\
-		      (b << 0) |					\
-		      (a << 24)))
-
-#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)
-
-# if defined( USE_X86_ASM )
-#  define READ_RGBA(rgba, _x, _y)                                       \
-    do {                                                                \
-       GLuint p = GET_VALUE(_x, _y);					\
-       __asm__ __volatile__( "bswap	%0; rorl $8, %0"                \
-				: "=r" (p) : "0" (p) );                 \
-       ((GLuint *)rgba)[0] = p;                                         \
-    } while (0)
-# elif defined( MESA_BIG_ENDIAN )
-    /* On PowerPC with GCC 3.4.2 the shift madness below becomes a single
-     * rotlwi instruction.  It also produces good code on SPARC.
-     */
-#  define READ_RGBA( rgba, _x, _y )				        \
-     do {								\
-        GLuint p = GET_VALUE(_x, _y);					\
-        GLuint t = p;                                                   \
-        *((uint32_t *) rgba) = (t >> 24) | (p << 8);                    \
-     } while (0)
-# else
-#  define READ_RGBA( rgba, _x, _y )				        \
-     do {								\
-        GLuint p = GET_VALUE(_x, _y);					\
-	rgba[0] = (p >> 16) & 0xff;					\
-	rgba[1] = (p >>  8) & 0xff;					\
-	rgba[2] = (p >>  0) & 0xff;					\
-	rgba[3] = (p >> 24) & 0xff;					\
-     } while (0)
-# endif
-
-#elif (SPANTMP_PIXEL_FMT == GL_BGRA) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8)
-
-/**
- ** GL_BGRA, GL_UNSIGNED_INT_8_8_8_8
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-# define INIT_MONO_PIXEL(p, color)                       \
-     p = PACK_COLOR_8888(color[2], color[1], color[0], color[3]) 
-
-# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \
-   PUT_VALUE(_x, _y, ((r << 8) |					\
-		      (g << 16) |					\
-		      (b << 24) |					\
-		      (a << 0)))
-
-#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)
-
-# if defined( USE_X86_ASM )
-#  define READ_RGBA(rgba, _x, _y)                                       \
-    do {                                                                \
-       GLuint p = GET_VALUE(_x, _y);					\
-       __asm__ __volatile__( "rorl $8, %0"				\
-				: "=r" (p) : "0" (p) );                 \
-       ((GLuint *)rgba)[0] = p;                                         \
-    } while (0)
-# elif defined( MESA_BIG_ENDIAN )
-    /* On PowerPC with GCC 3.4.2 the shift madness below becomes a single
-     * rotlwi instruction.  It also produces good code on SPARC.
-     */
-#  define READ_RGBA( rgba, _x, _y )				        \
-     do {								\
-        GLuint p = CPU_TO_LE32(GET_VALUE(_x, _y));                      \
-        GLuint t = p;                                                   \
-        *((uint32_t *) rgba) = (t >> 24) | (p << 8);                    \
-     } while (0)
-# else
-#  define READ_RGBA( rgba, _x, _y )				        \
-     do {								\
-        GLuint p = GET_VALUE(_x, _y);					\
-	rgba[0] = (p >>  8) & 0xff;					\
-	rgba[1] = (p >> 16) & 0xff;					\
-	rgba[2] = (p >> 24) & 0xff;					\
-	rgba[3] = (p >>  0) & 0xff;					\
-     } while (0)
-# endif
-
-#elif (SPANTMP_PIXEL_FMT == GL_BGR) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
-
-/**
- ** GL_BGR, GL_UNSIGNED_INT_8_8_8_8_REV
- **
- ** This is really for MESA_FORMAT_XRGB8888.  The spantmp code needs to be
- ** kicked to the curb, and we need to just code-gen this.
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-# define INIT_MONO_PIXEL(p, color)                       \
-     p = PACK_COLOR_8888(0xff, color[0], color[1], color[2])
-
-# define WRITE_RGBA(_x, _y, r, g, b, a)					\
-   PUT_VALUE(_x, _y, ((r << 16) |					\
-		      (g << 8) |					\
-		      (b << 0) |					\
-		      (0xff << 24)))
-
-#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)
-
-# if defined( USE_X86_ASM )
-#  define READ_RGBA(rgba, _x, _y)                                       \
-    do {                                                                \
-       GLuint p = GET_VALUE(_x, _y);					\
-       __asm__ __volatile__( "bswap	%0; rorl $8, %0"                \
-				: "=r" (p) : "0" (p) );                 \
-       ((GLuint *)rgba)[0] = p | 0xff000000;				\
-    } while (0)
-# elif defined( MESA_BIG_ENDIAN )
-    /* On PowerPC with GCC 3.4.2 the shift madness below becomes a single
-     * rotlwi instruction.  It also produces good code on SPARC.
-     */
-#  define READ_RGBA( rgba, _x, _y )				        \
-     do {								\
-        GLuint p = GET_VALUE(_x, _y);					\
-        *((uint32_t *) rgba) = (p << 8) | 0xff;				\
-     } while (0)
-# else
-#  define READ_RGBA( rgba, _x, _y )				        \
-     do {								\
-        GLuint p = GET_VALUE(_x, _y);					\
-	rgba[0] = (p >> 16) & 0xff;					\
-	rgba[1] = (p >>  8) & 0xff;					\
-	rgba[2] = (p >>  0) & 0xff;					\
-	rgba[3] = 0xff;							\
-     } while (0)
-# endif
-
-#elif (SPANTMP_PIXEL_FMT == GL_ALPHA) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_BYTE)
-
-/**
- ** GL_ALPHA, GL_UNSIGNED_BYTE
- **/
-
-#ifndef GET_VALUE
-#ifndef GET_PTR
-#define GET_PTR(_x, _y) (     buf + (_x) + (_y) * pitch)
-#endif
-
-#define GET_VALUE(_x, _y) *(volatile GLubyte *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLubyte *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
-# define INIT_MONO_PIXEL(p, color)                       \
-     p = color[3]
-
-# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \
-   PUT_VALUE(_x, _y, a | (r & 0 /* quiet warnings */))
-
-#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)
-
-#define READ_RGBA( rgba, _x, _y )				        \
-     do {								\
-        GLubyte p = GET_VALUE(_x, _y);					\
-	rgba[0] = 0;							\
-	rgba[1] = 0;							\
-	rgba[2] = 0;							\
-	rgba[3] = p;							\
-     } while (0)
-
-#else
-#error SPANTMP_PIXEL_FMT must be set to a valid value!
-#endif
-
-
-
-/**
- ** Assembly routines.
- **/
-
-#if defined( USE_MMX_ASM ) || defined( USE_SSE_ASM )
-#include "x86/read_rgba_span_x86.h"
-#include "x86/common_x86_asm.h"
-#endif
-
-static void TAG(WriteRGBASpan)( GLcontext *ctx,
-                                struct gl_renderbuffer *rb,
-				GLuint n, GLint x, GLint y,
-				const void *values, const GLubyte mask[] )
-{
-   HW_WRITE_LOCK()
-      {
-         const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
-	 GLint x1;
-	 GLint n1;
-	 LOCAL_VARS;
-
-	 y = Y_FLIP(y);
-
-	 HW_WRITE_CLIPLOOP()
-	    {
-	       GLint i = 0;
-	       CLIPSPAN(x,y,n,x1,n1,i);
-
-	       if (DBG) fprintf(stderr, "WriteRGBASpan %d..%d (x1 %d)\n",
-				(int)i, (int)n1, (int)x1);
-
-	       if (mask)
-	       {
-		  for (;n1>0;i++,x1++,n1--)
-		     if (mask[i])
-			WRITE_RGBA( x1, y,
-				    rgba[i][0], rgba[i][1],
-				    rgba[i][2], rgba[i][3] );
-	       }
-	       else
-	       {
-		  for (;n1>0;i++,x1++,n1--)
-		     WRITE_RGBA( x1, y,
-				 rgba[i][0], rgba[i][1],
-				 rgba[i][2], rgba[i][3] );
-	       }
-	    }
-	 HW_ENDCLIPLOOP();
-      }
-   HW_WRITE_UNLOCK();
-}
-
-static void TAG(WriteRGBSpan)( GLcontext *ctx,
-                               struct gl_renderbuffer *rb,
-			       GLuint n, GLint x, GLint y,
-			       const void *values, const GLubyte mask[] )
-{
-   HW_WRITE_LOCK()
-      {
-         const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;
-	 GLint x1;
-	 GLint n1;
-	 LOCAL_VARS;
-
-	 y = Y_FLIP(y);
-
-	 HW_WRITE_CLIPLOOP()
-	    {
-	       GLint i = 0;
-	       CLIPSPAN(x,y,n,x1,n1,i);
-
-	       if (DBG) fprintf(stderr, "WriteRGBSpan %d..%d (x1 %d)\n",
-				(int)i, (int)n1, (int)x1);
-
-	       if (mask)
-	       {
-		  for (;n1>0;i++,x1++,n1--)
-		     if (mask[i])
-			WRITE_RGBA( x1, y, rgb[i][0], rgb[i][1], rgb[i][2], 255 );
-	       }
-	       else
-	       {
-		  for (;n1>0;i++,x1++,n1--)
-		     WRITE_RGBA( x1, y, rgb[i][0], rgb[i][1], rgb[i][2], 255 );
-	       }
-	    }
-	 HW_ENDCLIPLOOP();
-      }
-   HW_WRITE_UNLOCK();
-}
-
-static void TAG(WriteRGBAPixels)( GLcontext *ctx,
-                                  struct gl_renderbuffer *rb,
-                                  GLuint n, const GLint x[], const GLint y[],
-                                  const void *values, const GLubyte mask[] )
-{
-   HW_WRITE_LOCK()
-      {
-         const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
-	 GLint i;
-	 LOCAL_VARS;
-
-	 if (DBG) fprintf(stderr, "WriteRGBAPixels\n");
-
-	 HW_WRITE_CLIPLOOP()
-	    {
-	       if (mask)
-	       {
-	          for (i=0;i<n;i++)
-	          {
-		     if (mask[i]) {
-		        const int fy = Y_FLIP(y[i]);
-		        if (CLIPPIXEL(x[i],fy))
-			   WRITE_RGBA( x[i], fy,
-				       rgba[i][0], rgba[i][1],
-				       rgba[i][2], rgba[i][3] );
-		     }
-	          }
-	       }
-	       else
-	       {
-	          for (i=0;i<n;i++)
-	          {
-		     const int fy = Y_FLIP(y[i]);
-		     if (CLIPPIXEL(x[i],fy))
-			WRITE_RGBA( x[i], fy,
-				    rgba[i][0], rgba[i][1],
-				    rgba[i][2], rgba[i][3] );
-	          }
-	       }
-	    }
-	 HW_ENDCLIPLOOP();
-      }
-   HW_WRITE_UNLOCK();
-}
-
-
-static void TAG(WriteMonoRGBASpan)( GLcontext *ctx,	
-                                    struct gl_renderbuffer *rb,
-				    GLuint n, GLint x, GLint y, 
-				    const void *value, const GLubyte mask[] )
-{
-   HW_WRITE_LOCK()
-      {
-         const GLubyte *color = (const GLubyte *) value;
-	 GLint x1;
-	 GLint n1;
-	 LOCAL_VARS;
-	 INIT_MONO_PIXEL(p, color);
-
-	 y = Y_FLIP( y );
-
-	 if (DBG) fprintf(stderr, "WriteMonoRGBASpan\n");
-
-	 HW_WRITE_CLIPLOOP()
-	    {
-	       GLint i = 0;
-	       CLIPSPAN(x,y,n,x1,n1,i);
-	       if (mask)
-	       {
-	          for (;n1>0;i++,x1++,n1--)
-		     if (mask[i])
-		        WRITE_PIXEL( x1, y, p );
-	       }
-	       else
-	       {
-	          for (;n1>0;i++,x1++,n1--)
-		     WRITE_PIXEL( x1, y, p );
-	       }
-	    }
-	 HW_ENDCLIPLOOP();
-      }
-   HW_WRITE_UNLOCK();
-}
-
-
-static void TAG(WriteMonoRGBAPixels)( GLcontext *ctx,
-                                      struct gl_renderbuffer *rb,
-				      GLuint n,
-				      const GLint x[], const GLint y[],
-				      const void *value,
-				      const GLubyte mask[] ) 
-{
-   HW_WRITE_LOCK()
-      {
-         const GLubyte *color = (const GLubyte *) value;
-	 GLint i;
-	 LOCAL_VARS;
-	 INIT_MONO_PIXEL(p, color);
-
-	 if (DBG) fprintf(stderr, "WriteMonoRGBAPixels\n");
-
-	 HW_WRITE_CLIPLOOP()
-	    {
-	       if (mask)
-	       {
-		  for (i=0;i<n;i++)
-		     if (mask[i]) {
-			int fy = Y_FLIP(y[i]);
-			if (CLIPPIXEL( x[i], fy ))
-			   WRITE_PIXEL( x[i], fy, p );
-		     }
-	       }
-	       else
-	       {
-		  for (i=0;i<n;i++) {
-		     int fy = Y_FLIP(y[i]);
-		     if (CLIPPIXEL( x[i], fy ))
-			WRITE_PIXEL( x[i], fy, p );
-		  }
-	       }
-	    }
-	 HW_ENDCLIPLOOP();
-      }
-   HW_WRITE_UNLOCK();
-}
-
-
-static void TAG(ReadRGBASpan)( GLcontext *ctx,
-                               struct gl_renderbuffer *rb,
-			       GLuint n, GLint x, GLint y, void *values)
-{
-   HW_READ_LOCK()
-      {
-         GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;
-	 GLint x1,n1;
-	 LOCAL_VARS;
-
-	 y = Y_FLIP(y);
-
-	 if (DBG) fprintf(stderr, "ReadRGBASpan\n");
-
-	 HW_READ_CLIPLOOP()
-	    {
-	       GLint i = 0;
-	       CLIPSPAN(x,y,n,x1,n1,i);
-	       for (;n1>0;i++,x1++,n1--)
-		  READ_RGBA( rgba[i], x1, y );
-	    }
-         HW_ENDCLIPLOOP();
-      }
-   HW_READ_UNLOCK();
-}
-
-
-#if defined(GET_PTR) && \
-   defined(USE_MMX_ASM) && \
-   (((SPANTMP_PIXEL_FMT == GL_BGRA) && \
-	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)) || \
-    ((SPANTMP_PIXEL_FMT == GL_RGB) && \
-	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)))
-static void TAG2(ReadRGBASpan,_MMX)( GLcontext *ctx,
-                                     struct gl_renderbuffer *rb,
-                                     GLuint n, GLint x, GLint y, void *values)
-{
-#ifndef USE_INNER_EMMS
-   /* The EMMS instruction is directly in-lined here because using GCC's
-    * built-in _mm_empty function was found to utterly destroy performance.
-    */
-   __asm__ __volatile__( "emms" );
-#endif
-
-   HW_READ_LOCK()
-     {
-        GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;
-	GLint x1,n1;
-	LOCAL_VARS;
-
-	y = Y_FLIP(y);
-
-	if (DBG) fprintf(stderr, "ReadRGBASpan\n");
-
-	HW_READ_CLIPLOOP()
-	  {
-	     GLint i = 0;
-	     CLIPSPAN(x,y,n,x1,n1,i);
-
-	       {
-		  const void * src = GET_PTR( x1, y );
-#if (SPANTMP_PIXEL_FMT == GL_RGB) && \
-		  (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)
-		  _generic_read_RGBA_span_RGB565_MMX( src, rgba[i], n1 );
-#else
-		  _generic_read_RGBA_span_BGRA8888_REV_MMX( src, rgba[i], n1 );
-#endif
-	       }
-	  }
-	HW_ENDCLIPLOOP();
-     }
-   HW_READ_UNLOCK();
-#ifndef USE_INNER_EMMS
-   __asm__ __volatile__( "emms" );
-#endif
-}
-#endif
-
-
-#if defined(GET_PTR) &&	\
-   defined(USE_SSE_ASM) && \
-   (SPANTMP_PIXEL_FMT == GL_BGRA) && \
-     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
-static void TAG2(ReadRGBASpan,_SSE2)( GLcontext *ctx,
-                                      struct gl_renderbuffer *rb,
-                                      GLuint n, GLint x, GLint y,
-                                      void *values)
-{
-   HW_READ_LOCK()
-     {
-        GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;
-	GLint x1,n1;
-	LOCAL_VARS;
-
-	y = Y_FLIP(y);
-
-	if (DBG) fprintf(stderr, "ReadRGBASpan\n");
-
-	HW_READ_CLIPLOOP()
-	  {
-	     GLint i = 0;
-	     CLIPSPAN(x,y,n,x1,n1,i);
-
-	       {
-		  const void * src = GET_PTR( x1, y );
-		  _generic_read_RGBA_span_BGRA8888_REV_SSE2( src, rgba[i], n1 );
-	       }
-	  }
-	HW_ENDCLIPLOOP();
-     }
-   HW_READ_UNLOCK();
-}
-#endif
-
-#if defined(GET_PTR) &&	\
-   defined(USE_SSE_ASM) && \
-   (SPANTMP_PIXEL_FMT == GL_BGRA) && \
-     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
-static void TAG2(ReadRGBASpan,_SSE)( GLcontext *ctx,
-                                     struct gl_renderbuffer *rb,
-                                     GLuint n, GLint x, GLint y,
-                                     void *values)
-{
-#ifndef USE_INNER_EMMS
-   /* The EMMS instruction is directly in-lined here because using GCC's
-    * built-in _mm_empty function was found to utterly destroy performance.
-    */
-   __asm__ __volatile__( "emms" );
-#endif
-
-   HW_READ_LOCK()
-     {
-        GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;
-	GLint x1,n1;
-	LOCAL_VARS;
-
-	y = Y_FLIP(y);
-
-	if (DBG) fprintf(stderr, "ReadRGBASpan\n");
-
-	HW_READ_CLIPLOOP()
-	  {
-	     GLint i = 0;
-	     CLIPSPAN(x,y,n,x1,n1,i);
-
-	       {
-		  const void * src = GET_PTR( x1, y );
-		  _generic_read_RGBA_span_BGRA8888_REV_SSE( src, rgba[i], n1 );
-	       }
-	  }
-	HW_ENDCLIPLOOP();
-     }
-   HW_READ_UNLOCK();
-#ifndef USE_INNER_EMMS
-   __asm__ __volatile__( "emms" );
-#endif
-}
-#endif
-
-
-static void TAG(ReadRGBAPixels)( GLcontext *ctx,
-                                 struct gl_renderbuffer *rb,
-				 GLuint n, const GLint x[], const GLint y[],
-				 void *values )
-{
-   HW_READ_LOCK()
-      {
-         GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;
-	 GLint i;
-	 LOCAL_VARS;
-
-	 if (DBG) fprintf(stderr, "ReadRGBAPixels\n");
-
-	 HW_READ_CLIPLOOP()
-	    {
-               for (i=0;i<n;i++) {
-                  int fy = Y_FLIP( y[i] );
-                     if (CLIPPIXEL( x[i], fy ))
-                        READ_RGBA( rgba[i], x[i], fy );
-               }
-	    }
-	 HW_ENDCLIPLOOP();
-      }
-   HW_READ_UNLOCK();
-}
-
-static void TAG(InitPointers)(struct gl_renderbuffer *rb)
-{
-   rb->PutRow = TAG(WriteRGBASpan);
-   rb->PutRowRGB = TAG(WriteRGBSpan);
-   rb->PutMonoRow = TAG(WriteMonoRGBASpan);
-   rb->PutValues = TAG(WriteRGBAPixels);
-   rb->PutMonoValues = TAG(WriteMonoRGBAPixels);
-   rb->GetValues = TAG(ReadRGBAPixels);
-
-#if defined(GET_PTR)
-#if defined(USE_SSE_ASM) && \
-   (SPANTMP_PIXEL_FMT == GL_BGRA) && \
-     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
-   if ( cpu_has_xmm2 ) {
-      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "SSE2" );
-      rb->GetRow = TAG2(ReadRGBASpan, _SSE2);
-   }
-   else
-#endif
-#if defined(USE_SSE_ASM) && \
-   (SPANTMP_PIXEL_FMT == GL_BGRA) && \
-     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
-   if ( cpu_has_xmm ) {
-      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "SSE" );
-      rb->GetRow = TAG2(ReadRGBASpan, _SSE);
-   }
-   else
-#endif
-#if defined(USE_MMX_ASM) && \
-   (((SPANTMP_PIXEL_FMT == GL_BGRA) && \
-	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)) || \
-    ((SPANTMP_PIXEL_FMT == GL_RGB) && \
-	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)))
-   if ( cpu_has_mmx ) {
-      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "MMX" );
-      rb->GetRow = TAG2(ReadRGBASpan, _MMX);
-   }
-   else
-#endif
-#endif /* GET_PTR */
-   {
-      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "C" );
-      rb->GetRow = TAG(ReadRGBASpan);
-   }
-
-}
-
-
-#undef INIT_MONO_PIXEL
-#undef WRITE_PIXEL
-#undef WRITE_RGBA
-#undef READ_RGBA
-#undef TAG
-#undef TAG2
-#undef GET_VALUE
-#undef PUT_VALUE
-#undef GET_PTR
-#undef SPANTMP_PIXEL_FMT
-#undef SPANTMP_PIXEL_TYPE
+/*

+ * Copyright 2000-2001 VA Linux Systems, Inc.

+ * (C) Copyright IBM Corporation 2004

+ * All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * on the rights to use, copy, modify, merge, publish, distribute, sub

+ * license, and/or sell copies of the Software, and to permit persons to whom

+ * the Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the next

+ * paragraph) shall be included in all copies or substantial portions of the

+ * Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL

+ * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,

+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

+ * USE OR OTHER DEALINGS IN THE SOFTWARE.

+ */

+

+/**

+ * \file spantmp2.h

+ *

+ * Template file of span read / write functions.

+ *

+ * \author Keith Whitwell <keithw@tungstengraphics.com>

+ * \author Gareth Hughes <gareth@nvidia.com>

+ * \author Ian Romanick <idr@us.ibm.com>

+ */

+

+#include "main/colormac.h"

+#include "spantmp_common.h"

+

+#ifndef DBG

+#define DBG 0

+#endif

+

+#ifndef HW_READ_CLIPLOOP

+#define HW_READ_CLIPLOOP()	HW_CLIPLOOP()

+#endif

+

+#ifndef HW_WRITE_CLIPLOOP

+#define HW_WRITE_CLIPLOOP()	HW_CLIPLOOP()

+#endif

+

+#ifdef SPANTMP_MESA_FMT

+#define SPANTMP_PIXEL_FMT GL_NONE

+#define SPANTMP_PIXEL_TYPE GL_NONE

+#endif

+

+#ifndef SPANTMP_MESA_FMT

+#define SPANTMP_MESA_FMT MESA_FORMAT_COUNT

+#endif

+

+#if (SPANTMP_PIXEL_FMT == GL_RGB)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)

+

+/**

+ ** GL_RGB, GL_UNSIGNED_SHORT_5_6_5

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+#define INIT_MONO_PIXEL(p, color) \

+  p = PACK_COLOR_565( color[0], color[1], color[2] )

+

+#define WRITE_RGBA( _x, _y, r, g, b, a )				\

+   PUT_VALUE(_x, _y, ((((int)r & 0xf8) << 8) |				\

+		      (((int)g & 0xfc) << 3) |				\

+		      (((int)b & 0xf8) >> 3)))				\

+

+#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )					\

+   do {									\

+      GLushort p = GET_VALUE(_x, _y);					\

+      rgba[0] = ((p >> 8) & 0xf8) * 255 / 0xf8;				\

+      rgba[1] = ((p >> 3) & 0xfc) * 255 / 0xfc;				\

+      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\

+      rgba[3] = 0xff;							\

+   } while (0)

+

+#elif (SPANTMP_PIXEL_FMT == GL_RGB)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5_REV)

+

+/**

+ ** GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+#define INIT_MONO_PIXEL(p, color) \

+  p = PACK_COLOR_565_REV( color[0], color[1], color[2] )

+

+#define WRITE_RGBA( _x, _y, r, g, b, a )				\

+   PUT_VALUE(_x, _y, PACK_COLOR_565_REV( r, g, b ))

+

+#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )					\

+   do {									\

+      GLushort p = GET_VALUE(_x, _y);					\

+      p = p << 8 | p >> 8;						\

+      rgba[0] = ((p >> 8) & 0xf8) * 255 / 0xf8;				\

+      rgba[1] = ((p >> 3) & 0xfc) * 255 / 0xfc;				\

+      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\

+      rgba[3] = 0xff;							\

+   } while (0)

+

+#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_4_4_4_4)

+

+/**

+ ** GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+#define INIT_MONO_PIXEL(p, color) \

+   p = PACK_COLOR_4444_REV(color[3], color[0], color[1], color[2])

+

+#define WRITE_RGBA( _x, _y, r, g, b, a )				\

+   PUT_VALUE(_x, _y, PACK_COLOR_4444_REV(a, r, g, b))			\

+

+#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )					\

+   do {									\

+      GLushort p = GET_VALUE(_x, _y);					\

+      rgba[0] = ((p >> 0) & 0xf) * 0x11;				\

+      rgba[1] = ((p >> 12) & 0xf) * 0x11;				\

+      rgba[2] = ((p >> 4) & 0xf) * 0x11;				\

+      rgba[3] = ((p >> 8) & 0xf) * 0x11;				\

+   } while (0)

+

+

+#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_4_4_4_4_REV)

+

+/**

+ ** GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+#define INIT_MONO_PIXEL(p, color) \

+   p = PACK_COLOR_4444(color[3], color[0], color[1], color[2])

+

+#define WRITE_RGBA( _x, _y, r, g, b, a )				\

+   PUT_VALUE(_x, _y, PACK_COLOR_4444(a, r, g, b))			\

+

+#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )					\

+   do {									\

+      GLushort p = GET_VALUE(_x, _y);					\

+      rgba[0] = ((p >> 8) & 0xf) * 0x11;				\

+      rgba[1] = ((p >> 4) & 0xf) * 0x11;				\

+      rgba[2] = ((p >> 0) & 0xf) * 0x11;				\

+      rgba[3] = ((p >> 12) & 0xf) * 0x11;				\

+   } while (0)

+

+

+#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_1_5_5_5_REV)

+

+/**

+ ** GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+#define INIT_MONO_PIXEL(p, color) \

+   p = PACK_COLOR_1555(color[3], color[0], color[1], color[2])

+

+#define WRITE_RGBA( _x, _y, r, g, b, a )				\

+   PUT_VALUE(_x, _y, PACK_COLOR_1555(a, r, g, b))			\

+

+#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )					\

+   do {									\

+      GLushort p = GET_VALUE(_x, _y);					\

+      rgba[0] = ((p >> 7) & 0xf8) * 255 / 0xf8;				\

+      rgba[1] = ((p >> 2) & 0xf8) * 255 / 0xf8;				\

+      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\

+      rgba[3] = ((p >> 15) & 0x1) * 0xff;				\

+   } while (0)

+

+#elif (SPANTMP_PIXEL_FMT == GL_BGRA)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_1_5_5_5)

+

+/**

+ ** GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+#define INIT_MONO_PIXEL(p, color) \

+   p = PACK_COLOR_1555_REV(color[3], color[0], color[1], color[2])

+

+#define WRITE_RGBA( _x, _y, r, g, b, a )				\

+   PUT_VALUE(_x, _y, PACK_COLOR_1555_REV(a, r, g, b))			\

+

+#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )					\

+   do {									\

+      GLushort p = GET_VALUE(_x, _y);					\

+      p = p << 8 | p >> 8;						\

+      rgba[0] = ((p >> 7) & 0xf8) * 255 / 0xf8;				\

+      rgba[1] = ((p >> 2) & 0xf8) * 255 / 0xf8;				\

+      rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\

+      rgba[3] = ((p >> 15) & 0x1) * 0xff;				\

+   } while (0)

+

+#elif (SPANTMP_PIXEL_FMT == GL_BGRA) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)

+

+/**

+ ** GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+     p = PACK_COLOR_8888(color[3], color[0], color[1], color[2]) 

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \

+   PUT_VALUE(_x, _y, ((r << 16) |					\

+		      (g << 8) |					\

+		      (b << 0) |					\

+		      (a << 24)))

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+# if defined( USE_X86_ASM )

+#  define READ_RGBA(rgba, _x, _y)                                       \

+    do {                                                                \

+       GLuint p = GET_VALUE(_x, _y);					\

+       __asm__ __volatile__( "bswap	%0; rorl $8, %0"                \

+				: "=r" (p) : "0" (p) );                 \

+       ((GLuint *)rgba)[0] = p;                                         \

+    } while (0)

+# elif defined( MESA_BIG_ENDIAN )

+    /* On PowerPC with GCC 3.4.2 the shift madness below becomes a single

+     * rotlwi instruction.  It also produces good code on SPARC.

+     */

+#  define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLuint p = GET_VALUE(_x, _y);					\

+        GLuint t = p;                                                   \

+        *((uint32_t *) rgba) = (t >> 24) | (p << 8);                    \

+     } while (0)

+# else

+#  define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLuint p = GET_VALUE(_x, _y);					\

+	rgba[0] = (p >> 16) & 0xff;					\

+	rgba[1] = (p >>  8) & 0xff;					\

+	rgba[2] = (p >>  0) & 0xff;					\

+	rgba[3] = (p >> 24) & 0xff;					\

+     } while (0)

+# endif

+

+#elif (SPANTMP_PIXEL_FMT == GL_BGRA) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8)

+

+/**

+ ** GL_BGRA, GL_UNSIGNED_INT_8_8_8_8

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+     p = PACK_COLOR_8888(color[2], color[1], color[0], color[3]) 

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \

+   PUT_VALUE(_x, _y, ((r << 8) |					\

+		      (g << 16) |					\

+		      (b << 24) |					\

+		      (a << 0)))

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+# if defined( USE_X86_ASM )

+#  define READ_RGBA(rgba, _x, _y)                                       \

+    do {                                                                \

+       GLuint p = GET_VALUE(_x, _y);					\

+       __asm__ __volatile__( "rorl $8, %0"				\

+				: "=r" (p) : "0" (p) );                 \

+       ((GLuint *)rgba)[0] = p;                                         \

+    } while (0)

+# elif defined( MESA_BIG_ENDIAN )

+    /* On PowerPC with GCC 3.4.2 the shift madness below becomes a single

+     * rotlwi instruction.  It also produces good code on SPARC.

+     */

+#  define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLuint p = CPU_TO_LE32(GET_VALUE(_x, _y));                      \

+        GLuint t = p;                                                   \

+        *((uint32_t *) rgba) = (t >> 24) | (p << 8);                    \

+     } while (0)

+# else

+#  define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLuint p = GET_VALUE(_x, _y);					\

+	rgba[0] = (p >>  8) & 0xff;					\

+	rgba[1] = (p >> 16) & 0xff;					\

+	rgba[2] = (p >> 24) & 0xff;					\

+	rgba[3] = (p >>  0) & 0xff;					\

+     } while (0)

+# endif

+

+#elif (SPANTMP_PIXEL_FMT == GL_BGR) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)

+

+/**

+ ** GL_BGR, GL_UNSIGNED_INT_8_8_8_8_REV

+ **

+ ** This is really for MESA_FORMAT_XRGB8888.  The spantmp code needs to be

+ ** kicked to the curb, and we need to just code-gen this.

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+     p = PACK_COLOR_8888(0xff, color[0], color[1], color[2])

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)					\

+   PUT_VALUE(_x, _y, ((r << 16) |					\

+		      (g << 8) |					\

+		      (b << 0) |					\

+		      (0xff << 24)))

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+# if defined( USE_X86_ASM )

+#  define READ_RGBA(rgba, _x, _y)                                       \

+    do {                                                                \

+       GLuint p = GET_VALUE(_x, _y);					\

+       __asm__ __volatile__( "bswap	%0; rorl $8, %0"                \

+				: "=r" (p) : "0" (p) );                 \

+       ((GLuint *)rgba)[0] = p | 0xff000000;				\

+    } while (0)

+# elif defined( MESA_BIG_ENDIAN )

+    /* On PowerPC with GCC 3.4.2 the shift madness below becomes a single

+     * rotlwi instruction.  It also produces good code on SPARC.

+     */

+#  define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLuint p = GET_VALUE(_x, _y);					\

+        *((uint32_t *) rgba) = (p << 8) | 0xff;				\

+     } while (0)

+# else

+#  define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLuint p = GET_VALUE(_x, _y);					\

+	rgba[0] = (p >> 16) & 0xff;					\

+	rgba[1] = (p >>  8) & 0xff;					\

+	rgba[2] = (p >>  0) & 0xff;					\

+	rgba[3] = 0xff;							\

+     } while (0)

+# endif

+

+#elif (SPANTMP_PIXEL_FMT == GL_ALPHA) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_BYTE)

+

+/**

+ ** GL_ALPHA, GL_UNSIGNED_BYTE

+ **/

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLubyte *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLubyte *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+     p = color[3]

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \

+   PUT_VALUE(_x, _y, a | (r & 0 /* quiet warnings */))

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLubyte p = GET_VALUE(_x, _y);					\

+	rgba[0] = 0;							\

+	rgba[1] = 0;							\

+	rgba[2] = 0;							\

+	rgba[3] = p;							\

+     } while (0)

+

+#elif (SPANTMP_MESA_FMT == MESA_FORMAT_R8)

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLubyte *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLubyte *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+     p = color[0]

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \

+   PUT_VALUE(_x, _y, r)

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLubyte p = GET_VALUE(_x, _y);					\

+	rgba[0] = p;							\

+	rgba[1] = 0;							\

+	rgba[2] = 0;							\

+	rgba[3] = 0;							\

+     } while (0)

+

+#elif (SPANTMP_MESA_FMT == MESA_FORMAT_RG88)

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+   PACK_COLOR_8888(color[0], color[1], 0, 0)

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \

+   PUT_VALUE(_x, _y, r)

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLushort p = GET_VALUE(_x, _y);					\

+	rgba[0] = p & 0xff;						\

+	rgba[1] = (p >> 8) & 0xff;					\

+	rgba[2] = 0;							\

+	rgba[3] = 0;							\

+     } while (0)

+

+#elif (SPANTMP_MESA_FMT == MESA_FORMAT_R16)

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) * 2 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+     p = color[0]

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \

+   PUT_VALUE(_x, _y, r)

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLushort p = GET_VALUE(_x, _y);					\

+	rgba[0] = p;							\

+	rgba[1] = 0;							\

+	rgba[2] = 0;							\

+	rgba[3] = 0;							\

+     } while (0)

+

+#elif (SPANTMP_MESA_FMT == MESA_FORMAT_RG1616)

+

+#ifndef GET_VALUE

+#ifndef GET_PTR

+#define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)

+#endif

+

+#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))

+#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)

+#endif /* GET_VALUE */

+

+# define INIT_MONO_PIXEL(p, color)                       \

+   ((color[1] << 16) | (color[0]))

+

+# define WRITE_RGBA(_x, _y, r, g, b, a)                                 \

+   PUT_VALUE(_x, _y, r)

+

+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)

+

+#define READ_RGBA( rgba, _x, _y )				        \

+     do {								\

+        GLuint p = GET_VALUE(_x, _y);					\

+	rgba[0] = p & 0xffff;						\

+	rgba[1] = (p >> 16) & 0xffff;					\

+	rgba[2] = 0;							\

+	rgba[3] = 0;							\

+     } while (0)

+

+#else

+#error SPANTMP_PIXEL_FMT must be set to a valid value!

+#endif

+

+

+

+/**

+ ** Assembly routines.

+ **/

+

+#if defined( USE_MMX_ASM ) || defined( USE_SSE_ASM )

+#include "x86/read_rgba_span_x86.h"

+#include "x86/common_x86_asm.h"

+#endif

+

+static void TAG(WriteRGBASpan)( struct gl_context *ctx,

+                                struct gl_renderbuffer *rb,

+				GLuint n, GLint x, GLint y,

+				const void *values, const GLubyte mask[] )

+{

+   HW_WRITE_LOCK()

+      {

+         const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;

+	 GLint x1;

+	 GLint n1;

+	 LOCAL_VARS;

+

+	 y = Y_FLIP(y);

+

+	 HW_WRITE_CLIPLOOP()

+	    {

+	       GLint i = 0;

+	       CLIPSPAN(x,y,n,x1,n1,i);

+

+	       if (DBG) fprintf(stderr, "WriteRGBASpan %d..%d (x1 %d)\n",

+				(int)i, (int)n1, (int)x1);

+

+	       if (mask)

+	       {

+		  for (;n1>0;i++,x1++,n1--)

+		     if (mask[i])

+			WRITE_RGBA( x1, y,

+				    rgba[i][0], rgba[i][1],

+				    rgba[i][2], rgba[i][3] );

+	       }

+	       else

+	       {

+		  for (;n1>0;i++,x1++,n1--)

+		     WRITE_RGBA( x1, y,

+				 rgba[i][0], rgba[i][1],

+				 rgba[i][2], rgba[i][3] );

+	       }

+	    }

+	 HW_ENDCLIPLOOP();

+      }

+   HW_WRITE_UNLOCK();

+}

+

+static void TAG(WriteRGBSpan)( struct gl_context *ctx,

+                               struct gl_renderbuffer *rb,

+			       GLuint n, GLint x, GLint y,

+			       const void *values, const GLubyte mask[] )

+{

+   HW_WRITE_LOCK()

+      {

+         const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;

+	 GLint x1;

+	 GLint n1;

+	 LOCAL_VARS;

+

+	 y = Y_FLIP(y);

+

+	 HW_WRITE_CLIPLOOP()

+	    {

+	       GLint i = 0;

+	       CLIPSPAN(x,y,n,x1,n1,i);

+

+	       if (DBG) fprintf(stderr, "WriteRGBSpan %d..%d (x1 %d)\n",

+				(int)i, (int)n1, (int)x1);

+

+	       if (mask)

+	       {

+		  for (;n1>0;i++,x1++,n1--)

+		     if (mask[i])

+			WRITE_RGBA( x1, y, rgb[i][0], rgb[i][1], rgb[i][2], 255 );

+	       }

+	       else

+	       {

+		  for (;n1>0;i++,x1++,n1--)

+		     WRITE_RGBA( x1, y, rgb[i][0], rgb[i][1], rgb[i][2], 255 );

+	       }

+	    }

+	 HW_ENDCLIPLOOP();

+      }

+   HW_WRITE_UNLOCK();

+}

+

+static void TAG(WriteRGBAPixels)( struct gl_context *ctx,

+                                  struct gl_renderbuffer *rb,

+                                  GLuint n, const GLint x[], const GLint y[],

+                                  const void *values, const GLubyte mask[] )

+{

+   HW_WRITE_LOCK()

+      {

+         const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;

+	 GLint i;

+	 LOCAL_VARS;

+

+	 if (DBG) fprintf(stderr, "WriteRGBAPixels\n");

+

+	 HW_WRITE_CLIPLOOP()

+	    {

+	       if (mask)

+	       {

+	          for (i=0;i<n;i++)

+	          {

+		     if (mask[i]) {

+		        const int fy = Y_FLIP(y[i]);

+		        if (CLIPPIXEL(x[i],fy))

+			   WRITE_RGBA( x[i], fy,

+				       rgba[i][0], rgba[i][1],

+				       rgba[i][2], rgba[i][3] );

+		     }

+	          }

+	       }

+	       else

+	       {

+	          for (i=0;i<n;i++)

+	          {

+		     const int fy = Y_FLIP(y[i]);

+		     if (CLIPPIXEL(x[i],fy))

+			WRITE_RGBA( x[i], fy,

+				    rgba[i][0], rgba[i][1],

+				    rgba[i][2], rgba[i][3] );

+	          }

+	       }

+	    }

+	 HW_ENDCLIPLOOP();

+      }

+   HW_WRITE_UNLOCK();

+}

+

+

+static void TAG(WriteMonoRGBASpan)( struct gl_context *ctx,	

+                                    struct gl_renderbuffer *rb,

+				    GLuint n, GLint x, GLint y, 

+				    const void *value, const GLubyte mask[] )

+{

+   HW_WRITE_LOCK()

+      {

+         const GLubyte *color = (const GLubyte *) value;

+	 GLint x1;

+	 GLint n1;

+	 LOCAL_VARS;

+	 INIT_MONO_PIXEL(p, color);

+

+	 y = Y_FLIP( y );

+

+	 if (DBG) fprintf(stderr, "WriteMonoRGBASpan\n");

+

+	 HW_WRITE_CLIPLOOP()

+	    {

+	       GLint i = 0;

+	       CLIPSPAN(x,y,n,x1,n1,i);

+	       if (mask)

+	       {

+	          for (;n1>0;i++,x1++,n1--)

+		     if (mask[i])

+		        WRITE_PIXEL( x1, y, p );

+	       }

+	       else

+	       {

+	          for (;n1>0;i++,x1++,n1--)

+		     WRITE_PIXEL( x1, y, p );

+	       }

+	    }

+	 HW_ENDCLIPLOOP();

+      }

+   HW_WRITE_UNLOCK();

+}

+

+

+static void TAG(WriteMonoRGBAPixels)( struct gl_context *ctx,

+                                      struct gl_renderbuffer *rb,

+				      GLuint n,

+				      const GLint x[], const GLint y[],

+				      const void *value,

+				      const GLubyte mask[] ) 

+{

+   HW_WRITE_LOCK()

+      {

+         const GLubyte *color = (const GLubyte *) value;

+	 GLint i;

+	 LOCAL_VARS;

+	 INIT_MONO_PIXEL(p, color);

+

+	 if (DBG) fprintf(stderr, "WriteMonoRGBAPixels\n");

+

+	 HW_WRITE_CLIPLOOP()

+	    {

+	       if (mask)

+	       {

+		  for (i=0;i<n;i++)

+		     if (mask[i]) {

+			int fy = Y_FLIP(y[i]);

+			if (CLIPPIXEL( x[i], fy ))

+			   WRITE_PIXEL( x[i], fy, p );

+		     }

+	       }

+	       else

+	       {

+		  for (i=0;i<n;i++) {

+		     int fy = Y_FLIP(y[i]);

+		     if (CLIPPIXEL( x[i], fy ))

+			WRITE_PIXEL( x[i], fy, p );

+		  }

+	       }

+	    }

+	 HW_ENDCLIPLOOP();

+      }

+   HW_WRITE_UNLOCK();

+}

+

+

+static void TAG(ReadRGBASpan)( struct gl_context *ctx,

+                               struct gl_renderbuffer *rb,

+			       GLuint n, GLint x, GLint y, void *values)

+{

+   HW_READ_LOCK()

+      {

+         GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;

+	 GLint x1,n1;

+	 LOCAL_VARS;

+

+	 y = Y_FLIP(y);

+

+	 if (DBG) fprintf(stderr, "ReadRGBASpan\n");

+

+	 HW_READ_CLIPLOOP()

+	    {

+	       GLint i = 0;

+	       CLIPSPAN(x,y,n,x1,n1,i);

+	       for (;n1>0;i++,x1++,n1--)

+		  READ_RGBA( rgba[i], x1, y );

+	    }

+         HW_ENDCLIPLOOP();

+      }

+   HW_READ_UNLOCK();

+}

+

+

+#if defined(GET_PTR) && \

+   defined(USE_MMX_ASM) && \

+   (((SPANTMP_PIXEL_FMT == GL_BGRA) && \

+	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)) || \

+    ((SPANTMP_PIXEL_FMT == GL_RGB) && \

+	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)))

+static void TAG2(ReadRGBASpan,_MMX)( struct gl_context *ctx,

+                                     struct gl_renderbuffer *rb,

+                                     GLuint n, GLint x, GLint y, void *values)

+{

+#ifndef USE_INNER_EMMS

+   /* The EMMS instruction is directly in-lined here because using GCC's

+    * built-in _mm_empty function was found to utterly destroy performance.

+    */

+   __asm__ __volatile__( "emms" );

+#endif

+

+   HW_READ_LOCK()

+     {

+        GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;

+	GLint x1,n1;

+	LOCAL_VARS;

+

+	y = Y_FLIP(y);

+

+	if (DBG) fprintf(stderr, "ReadRGBASpan\n");

+

+	HW_READ_CLIPLOOP()

+	  {

+	     GLint i = 0;

+	     CLIPSPAN(x,y,n,x1,n1,i);

+

+	       {

+		  const void * src = GET_PTR( x1, y );

+#if (SPANTMP_PIXEL_FMT == GL_RGB) && \

+		  (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)

+		  _generic_read_RGBA_span_RGB565_MMX( src, rgba[i], n1 );

+#else

+		  _generic_read_RGBA_span_BGRA8888_REV_MMX( src, rgba[i], n1 );

+#endif

+	       }

+	  }

+	HW_ENDCLIPLOOP();

+     }

+   HW_READ_UNLOCK();

+#ifndef USE_INNER_EMMS

+   __asm__ __volatile__( "emms" );

+#endif

+}

+#endif

+

+

+#if defined(GET_PTR) &&	\

+   defined(USE_SSE_ASM) && \

+   (SPANTMP_PIXEL_FMT == GL_BGRA) && \

+     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)

+static void TAG2(ReadRGBASpan,_SSE2)( struct gl_context *ctx,

+                                      struct gl_renderbuffer *rb,

+                                      GLuint n, GLint x, GLint y,

+                                      void *values)

+{

+   HW_READ_LOCK()

+     {

+        GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;

+	GLint x1,n1;

+	LOCAL_VARS;

+

+	y = Y_FLIP(y);

+

+	if (DBG) fprintf(stderr, "ReadRGBASpan\n");

+

+	HW_READ_CLIPLOOP()

+	  {

+	     GLint i = 0;

+	     CLIPSPAN(x,y,n,x1,n1,i);

+

+	       {

+		  const void * src = GET_PTR( x1, y );

+		  _generic_read_RGBA_span_BGRA8888_REV_SSE2( src, rgba[i], n1 );

+	       }

+	  }

+	HW_ENDCLIPLOOP();

+     }

+   HW_READ_UNLOCK();

+}

+#endif

+

+#if defined(GET_PTR) &&	\

+   defined(USE_SSE_ASM) && \

+   (SPANTMP_PIXEL_FMT == GL_BGRA) && \

+     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)

+static void TAG2(ReadRGBASpan,_SSE)( struct gl_context *ctx,

+                                     struct gl_renderbuffer *rb,

+                                     GLuint n, GLint x, GLint y,

+                                     void *values)

+{

+#ifndef USE_INNER_EMMS

+   /* The EMMS instruction is directly in-lined here because using GCC's

+    * built-in _mm_empty function was found to utterly destroy performance.

+    */

+   __asm__ __volatile__( "emms" );

+#endif

+

+   HW_READ_LOCK()

+     {

+        GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;

+	GLint x1,n1;

+	LOCAL_VARS;

+

+	y = Y_FLIP(y);

+

+	if (DBG) fprintf(stderr, "ReadRGBASpan\n");

+

+	HW_READ_CLIPLOOP()

+	  {

+	     GLint i = 0;

+	     CLIPSPAN(x,y,n,x1,n1,i);

+

+	       {

+		  const void * src = GET_PTR( x1, y );

+		  _generic_read_RGBA_span_BGRA8888_REV_SSE( src, rgba[i], n1 );

+	       }

+	  }

+	HW_ENDCLIPLOOP();

+     }

+   HW_READ_UNLOCK();

+#ifndef USE_INNER_EMMS

+   __asm__ __volatile__( "emms" );

+#endif

+}

+#endif

+

+

+static void TAG(ReadRGBAPixels)( struct gl_context *ctx,

+                                 struct gl_renderbuffer *rb,

+				 GLuint n, const GLint x[], const GLint y[],

+				 void *values )

+{

+   HW_READ_LOCK()

+      {

+         GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;

+	 GLint i;

+	 LOCAL_VARS;

+

+	 if (DBG) fprintf(stderr, "ReadRGBAPixels\n");

+

+	 HW_READ_CLIPLOOP()

+	    {

+               for (i=0;i<n;i++) {

+                  int fy = Y_FLIP( y[i] );

+                     if (CLIPPIXEL( x[i], fy ))

+                        READ_RGBA( rgba[i], x[i], fy );

+               }

+	    }

+	 HW_ENDCLIPLOOP();

+      }

+   HW_READ_UNLOCK();

+}

+

+static void TAG(InitPointers)(struct gl_renderbuffer *rb)

+{

+   rb->PutRow = TAG(WriteRGBASpan);

+   rb->PutRowRGB = TAG(WriteRGBSpan);

+   rb->PutMonoRow = TAG(WriteMonoRGBASpan);

+   rb->PutValues = TAG(WriteRGBAPixels);

+   rb->PutMonoValues = TAG(WriteMonoRGBAPixels);

+   rb->GetValues = TAG(ReadRGBAPixels);

+

+#if defined(GET_PTR)

+#if defined(USE_SSE_ASM) && \

+   (SPANTMP_PIXEL_FMT == GL_BGRA) && \

+     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)

+   if ( cpu_has_xmm2 ) {

+      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "SSE2" );

+      rb->GetRow = TAG2(ReadRGBASpan, _SSE2);

+   }

+   else

+#endif

+#if defined(USE_SSE_ASM) && \

+   (SPANTMP_PIXEL_FMT == GL_BGRA) && \

+     (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)

+   if ( cpu_has_xmm ) {

+      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "SSE" );

+      rb->GetRow = TAG2(ReadRGBASpan, _SSE);

+   }

+   else

+#endif

+#if defined(USE_MMX_ASM) && \

+   (((SPANTMP_PIXEL_FMT == GL_BGRA) && \

+	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)) || \

+    ((SPANTMP_PIXEL_FMT == GL_RGB) && \

+	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)))

+   if ( cpu_has_mmx ) {

+      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "MMX" );

+      rb->GetRow = TAG2(ReadRGBASpan, _MMX);

+   }

+   else

+#endif

+#endif /* GET_PTR */

+   {

+      if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "C" );

+      rb->GetRow = TAG(ReadRGBASpan);

+   }

+

+}

+

+

+#undef INIT_MONO_PIXEL

+#undef WRITE_PIXEL

+#undef WRITE_RGBA

+#undef READ_RGBA

+#undef TAG

+#undef TAG2

+#undef GET_VALUE

+#undef PUT_VALUE

+#undef GET_PTR

+#undef SPANTMP_PIXEL_FMT

+#undef SPANTMP_PIXEL_TYPE

+#undef SPANTMP_MESA_FMT