From a5f02368d2a9ab1f814eba2c997729c6c655fc5e Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 15 Jul 2008 13:14:18 -0700
Subject: intel-gem: Disable spantmp sse/mmx functions when tile swizzling.

Those functions rely on being able to treat the GET_PTR returned value as an
array indexed by x, but that's not the case for our tiling.

Bug #16387
---
 src/mesa/drivers/dri/common/spantmp2.h  | 16 +++++++++++++---
 src/mesa/drivers/dri/intel/intel_span.c |  4 ++++
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/mesa/drivers/dri/common/spantmp2.h b/src/mesa/drivers/dri/common/spantmp2.h
index 53f5f846a0..5e51112a20 100644
--- a/src/mesa/drivers/dri/common/spantmp2.h
+++ b/src/mesa/drivers/dri/common/spantmp2.h
@@ -48,6 +48,10 @@
 #define HW_WRITE_CLIPLOOP()	HW_CLIPLOOP()
 #endif
 
+/* Whether GET_PTR(x, y) + cpp != GET_PTR(x+1, y) */
+#ifndef GET_PTR_NONLINEAR
+#define GET_PTR_NONLINEAR 0
+#endif
 
 #if (SPANTMP_PIXEL_FMT == GL_RGB)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)
 
@@ -389,7 +393,8 @@ static void TAG(ReadRGBASpan)( GLcontext *ctx,
 }
 
 
-#if defined(USE_MMX_ASM) && \
+#if !GET_PTR_NONLINEAR && \
+   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) && \
@@ -440,7 +445,8 @@ static void TAG2(ReadRGBASpan,_MMX)( GLcontext *ctx,
 #endif
 
 
-#if defined(USE_SSE_ASM) && \
+#if !GET_PTR_NONLINEAR && \
+   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,
@@ -474,7 +480,8 @@ static void TAG2(ReadRGBASpan,_SSE2)( GLcontext *ctx,
 }
 #endif
 
-#if defined(USE_SSE_ASM) && \
+#if !GET_PTR_NONLINEAR && \
+   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,
@@ -567,6 +574,7 @@ static void TAG(InitPointers)(struct gl_renderbuffer *rb)
    rb->PutMonoValues = TAG(WriteMonoRGBAPixels);
    rb->GetValues = TAG(ReadRGBAPixels);
 
+#if !GET_PTR_NONLINEAR
 #if defined(USE_SSE_ASM) && \
    (SPANTMP_PIXEL_FMT == GL_BGRA) && \
      (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
@@ -596,6 +604,7 @@ static void TAG(InitPointers)(struct gl_renderbuffer *rb)
    }
    else
 #endif
+#endif /* GET_PTR_NONLINEAR */
    {
       if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "C" );
       rb->GetRow = TAG(ReadRGBASpan);
@@ -611,5 +620,6 @@ static void TAG(InitPointers)(struct gl_renderbuffer *rb)
 #undef TAG
 #undef TAG2
 #undef GET_PTR
+#undef GET_PTR_NONLINEAR
 #undef SPANTMP_PIXEL_FMT
 #undef SPANTMP_PIXEL_TYPE
diff --git a/src/mesa/drivers/dri/intel/intel_span.c b/src/mesa/drivers/dri/intel/intel_span.c
index 3065d15e32..4f0855df0a 100644
--- a/src/mesa/drivers/dri/intel/intel_span.c
+++ b/src/mesa/drivers/dri/intel/intel_span.c
@@ -273,6 +273,7 @@ static GLubyte *y_tile_swizzle(struct intel_renderbuffer *irb, struct intel_cont
 #define TAG(x)    intel_XTile_##x##_RGB565
 #define TAG2(x,y) intel_XTile_##x##_RGB565##y
 #define GET_PTR(X,Y) x_tile_swizzle(irb, intel, X, Y)
+#define GET_PTR_NONLINEAR 1
 #include "spantmp2.h"
 
 #define SPANTMP_PIXEL_FMT GL_RGB
@@ -281,6 +282,7 @@ static GLubyte *y_tile_swizzle(struct intel_renderbuffer *irb, struct intel_cont
 #define TAG(x)    intel_YTile_##x##_RGB565
 #define TAG2(x,y) intel_YTile_##x##_RGB565##y
 #define GET_PTR(X,Y) y_tile_swizzle(irb, intel, X, Y)
+#define GET_PTR_NONLINEAR 1
 #include "spantmp2.h"
 
 /* 32 bit ARGB888 color tile spanline and pixel functions
@@ -292,6 +294,7 @@ static GLubyte *y_tile_swizzle(struct intel_renderbuffer *irb, struct intel_cont
 #define TAG(x)    intel_XTile_##x##_ARGB8888
 #define TAG2(x,y) intel_XTile_##x##_ARGB8888##y
 #define GET_PTR(X,Y) x_tile_swizzle(irb, intel, X, Y)
+#define GET_PTR_NONLINEAR 1
 #include "spantmp2.h"
 
 #define SPANTMP_PIXEL_FMT GL_BGRA
@@ -300,6 +303,7 @@ static GLubyte *y_tile_swizzle(struct intel_renderbuffer *irb, struct intel_cont
 #define TAG(x)    intel_YTile_##x##_ARGB8888
 #define TAG2(x,y) intel_YTile_##x##_ARGB8888##y
 #define GET_PTR(X,Y) y_tile_swizzle(irb, intel, X, Y)
+#define GET_PTR_NONLINEAR 1
 #include "spantmp2.h"
 
 #define LOCAL_DEPTH_VARS						\
-- 
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