From 0c527ab0546eb1de9ee10cc31bc386a40e6b3f98 Mon Sep 17 00:00:00 2001
From: Jose Fonseca <j_r_fonseca@yahoo.co.uk>
Date: Fri, 19 Apr 2002 10:53:08 +0000
Subject: [PATCH] MMX add blending function added.

---
 src/mesa/swrast/s_blend.c | 10 ++++++++--
 src/mesa/x86/mmx.h        |  6 +++++-
 src/mesa/x86/mmx_blend.S  | 17 ++++++++++++++++-
 3 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/src/mesa/swrast/s_blend.c b/src/mesa/swrast/s_blend.c
index 9a1f647..0d75e2a 100644
--- a/src/mesa/swrast/s_blend.c
+++ b/src/mesa/swrast/s_blend.c
@@ -1,4 +1,4 @@
-/* $Id: s_blend.c,v 1.20 2002/04/19 10:33:34 jrfonseca Exp $ */
+/* $Id: s_blend.c,v 1.21 2002/04/19 10:53:08 jrfonseca Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -656,7 +656,13 @@ void _swrast_choose_blend_func( GLcontext *ctx )
 	 SWRAST_CONTEXT(ctx)->BlendFunc = blend_transparency;
    }
    else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_ONE && dstRGB==GL_ONE) {
-      SWRAST_CONTEXT(ctx)->BlendFunc = blend_add;
+#if defined(USE_MMX_ASM)
+      if ( cpu_has_mmx ) {
+         SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_add;
+      }
+      else
+#endif
+         SWRAST_CONTEXT(ctx)->BlendFunc = blend_add;
    }
    else if (((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_REVERSE_SUBTRACT_EXT)
 	     && (srcRGB==GL_ZERO && dstRGB==GL_SRC_COLOR))
diff --git a/src/mesa/x86/mmx.h b/src/mesa/x86/mmx.h
index 205677e..da16388 100644
--- a/src/mesa/x86/mmx.h
+++ b/src/mesa/x86/mmx.h
@@ -1,4 +1,4 @@
-/* $Id: mmx.h,v 1.7 2002/04/19 10:33:34 jrfonseca Exp $ */
+/* $Id: mmx.h,v 1.8 2002/04/19 10:53:08 jrfonseca Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -33,6 +33,10 @@ _mesa_mmx_blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[],
                               GLubyte rgba[][4], const GLubyte dest[][4] );
 
 extern void _ASMAPI
+_mesa_mmx_blend_add( GLcontext *ctx, GLuint n, const GLubyte mask[],
+                     GLubyte rgba[][4], const GLubyte dest[][4] );
+
+extern void _ASMAPI
 _mesa_mmx_blend_modulate( GLcontext *ctx, GLuint n, const GLubyte mask[],
                           GLubyte rgba[][4], const GLubyte dest[][4] );
 
diff --git a/src/mesa/x86/mmx_blend.S b/src/mesa/x86/mmx_blend.S
index ce946ec..f346046 100644
--- a/src/mesa/x86/mmx_blend.S
+++ b/src/mesa/x86/mmx_blend.S
@@ -270,7 +270,22 @@ const_80:
 #include "mmx_blendtmp.h"
 
 
-/* modulate
+/* add bleding mode
+ */
+
+#define TAG(x) x##_add
+
+#define INIT
+
+#define MAIN( rgba, dest ) \
+    GMB_LOAD( rgba, dest, MM1, MM2 )									;\
+    PADDUSB     ( MM1, MM2 )										;\
+    GMB_STORE( rgba, MM2 )
+
+#include "mmx_blendtmp.h"
+
+
+/* modulate blending mode
  */
 
 #define TAG(x) x##_modulate
-- 
2.7.4