From 63e8cda9f180acd0f4fc38ca9569b16fbd3640d7 Mon Sep 17 00:00:00 2001
From: Andre Maasikas <amaasikas@gmail.com>
Date: Wed, 22 Jun 2011 12:40:12 +0300
Subject: [PATCH] r600c: use BASE_VTX_LOC & AUTO_INDEX for drawing nonindexed
 with offset

Saves cmd buffer space as we were generating indexes into cs  in this case.
This was laying around in https://bugs.freedesktop.org/show_bug.cgi?id=32768
for a long time.
---
 src/mesa/drivers/dri/r600/r700_render.c | 68 +++----------------------
 1 file changed, 8 insertions(+), 60 deletions(-)

diff --git a/src/mesa/drivers/dri/r600/r700_render.c b/src/mesa/drivers/dri/r600/r700_render.c
index 2bd3b62bfdb..0f7a7a46b71 100644
--- a/src/mesa/drivers/dri/r600/r700_render.c
+++ b/src/mesa/drivers/dri/r600/r700_render.c
@@ -329,7 +329,7 @@ static void r700RunRenderPrimitiveImmediate(struct gl_context * ctx, int start,
 {
     context_t *context = R700_CONTEXT(ctx);
     BATCH_LOCALS(&context->radeon);
-    int type, i;
+    int type;
     uint32_t num_indices, total_emit = 0;
     uint32_t vgt_draw_initiator = 0;
     uint32_t vgt_index_type     = 0;
@@ -370,22 +370,7 @@ static void r700RunRenderPrimitiveImmediate(struct gl_context * ctx, int start,
     vgt_num_indices = num_indices;
     SETfield(vgt_draw_initiator, DI_MAJOR_MODE_0, MAJOR_MODE_shift, MAJOR_MODE_mask);
 
-    if (start == 0)
-    {
-	SETfield(vgt_draw_initiator, DI_SRC_SEL_AUTO_INDEX, SOURCE_SELECT_shift, SOURCE_SELECT_mask);
-    }
-    else
-    {
-	if (num_indices > 0xffff)
-	{
-		total_emit += num_indices;
-	}
-	else
-	{
-		total_emit += (num_indices + 1) / 2;
-	}
-	SETfield(vgt_draw_initiator, DI_SRC_SEL_IMMEDIATE, SOURCE_SELECT_shift, SOURCE_SELECT_mask);
-    }
+    SETfield(vgt_draw_initiator, DI_SRC_SEL_AUTO_INDEX, SOURCE_SELECT_shift, SOURCE_SELECT_mask);
 
     total_emit +=   3 /* VGT_PRIMITIVE_TYPE */
 	          + 2 /* VGT_INDEX_TYPE */
@@ -406,45 +391,13 @@ static void r700RunRenderPrimitiveImmediate(struct gl_context * ctx, int start,
     /* offset */
     R600_OUT_BATCH(CP_PACKET3(R600_IT_SET_CTL_CONST, 2));
     R600_OUT_BATCH(mmSQ_VTX_BASE_VTX_LOC - ASIC_CTL_CONST_BASE_INDEX);
-    R600_OUT_BATCH(0); //VTX_BASE_VTX_LOC
+    R600_OUT_BATCH(start); //VTX_BASE_VTX_LOC
     R600_OUT_BATCH(0); //VTX_START_INST_LOC
     // draw packet
-    if(start == 0)
-    {
-        R600_OUT_BATCH(CP_PACKET3(R600_IT_DRAW_INDEX_AUTO, 1));
-        R600_OUT_BATCH(vgt_num_indices);
-        R600_OUT_BATCH(vgt_draw_initiator);
-    }
-    else
-    {
-	if (num_indices > 0xffff)
-        {
-	    R600_OUT_BATCH(CP_PACKET3(R600_IT_DRAW_INDEX_IMMD, (num_indices + 1)));
-	    R600_OUT_BATCH(vgt_num_indices);
-	    R600_OUT_BATCH(vgt_draw_initiator);
-	    for (i = start; i < (start + num_indices); i++)
-	    {
-		R600_OUT_BATCH(i);
-	    }
-	}
-	else
-        {
-	    R600_OUT_BATCH(CP_PACKET3(R600_IT_DRAW_INDEX_IMMD, (((num_indices + 1) / 2) + 1)));
-	    R600_OUT_BATCH(vgt_num_indices);
-	    R600_OUT_BATCH(vgt_draw_initiator);
-	    for (i = start; i < (start + num_indices); i += 2)
-	    {
-		if ((i + 1) == (start + num_indices))
-		{
-		    R600_OUT_BATCH(i);
-		}
-		else
-		{
-		    R600_OUT_BATCH(((i + 1) << 16) | (i));
-		}
-	    }
-	}
-    }
+    
+    R600_OUT_BATCH(CP_PACKET3(R600_IT_DRAW_INDEX_AUTO, 1));
+    R600_OUT_BATCH(vgt_num_indices);
+    R600_OUT_BATCH(vgt_draw_initiator);
 
     END_BATCH();
     COMMIT_BATCH();
@@ -469,12 +422,7 @@ static GLuint r700PredictRenderSize(struct gl_context* ctx,
     else {
 	    for (i = 0; i < nr_prims; ++i)
 	    {
-		    if (prim[i].start == 0)
-			    dwords += 14;
-		    else if (prim[i].count > 0xffff)
-			    dwords += prim[i].count + 14;
-		    else
-			    dwords += ((prim[i].count + 1) / 2) + 14;
+	        dwords += 14;
 	    }
     }
 
-- 
2.30.2