Add Intel i965G/Q DRI driver.

This driver comes from Tungsten Graphics, with a few further modifications by
Intel.

1 files changed, 224 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_vs_constval.c b/src/mesa/drivers/dri/i965/brw_vs_constval.c
new file mode 100644
index 0000000000..9407f9a1a8
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_vs_constval.c
@@ -0,0 +1,224 @@
+/*
+ Copyright (C) Intel Corp.  2006.  All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+ 
+ 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 the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, 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 NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS 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.
+ 
+ **********************************************************************/
+ /*
+  * Authors:
+  *   Keith Whitwell <keith@tungstengraphics.com>
+  */
+            
+
+#include "brw_context.h"
+#include "program.h"
+#include "program_instruction.h"
+#include "macros.h"
+#include "brw_vs.h"
+
+/* Component is active if it may diverge from [0,0,0,1].  Undef values
+ * are promoted to [0,0,0,1] for the purposes of this analysis.
+ */
+struct tracker {
+   GLboolean twoside;
+   GLubyte active[PROGRAM_OUTPUT+1][128];
+   GLuint size_masks[4];
+};
+
+
+static void set_active_component( struct tracker *t,
+				  GLuint file,
+				  GLuint index,
+				  GLubyte active )
+{
+   switch (file) {
+   case PROGRAM_TEMPORARY:
+   case PROGRAM_INPUT:
+   case PROGRAM_OUTPUT:
+      t->active[file][index] |= active;
+
+   default:
+      break;
+   }
+}
+
+static void set_active( struct tracker *t,
+			struct prog_dst_register dst,
+			GLuint active )
+{
+   set_active_component( t, dst.File, dst.Index, active & dst.WriteMask );
+}
+
+
+static GLubyte get_active_component( struct tracker *t,
+				     GLuint file,
+				     GLuint index,
+				     GLuint component,
+				     GLubyte swz )
+{
+   switch (swz) {
+   case SWIZZLE_ZERO:
+      return component < 3 ? 0 : (1<<component);
+   case SWIZZLE_ONE:
+      return component == 3 ? 0 : (1<<component);
+   default:
+      switch (file) {
+      case PROGRAM_TEMPORARY:
+      case PROGRAM_INPUT:
+      case PROGRAM_OUTPUT:
+	 return t->active[file][index] & (1<<component);
+      default:
+	 return 1 << component;
+      }
+   }
+}
+
+
+static GLubyte get_active( struct tracker *t,
+			   struct prog_src_register src )
+{
+   GLuint i;
+   GLubyte active = src.NegateBase; /* NOTE! */
+
+   if (src.RelAddr)
+      return 0xf;
+
+   for (i = 0; i < 4; i++) 
+      active |= get_active_component(t, src.File, src.Index, i,
+				     GET_SWZ(src.Swizzle, i));
+
+   return active;
+}
+
+static GLubyte get_output_size( struct tracker *t,
+				GLuint idx )
+{
+   GLubyte active = t->active[PROGRAM_OUTPUT][idx];
+   if (active & (1<<3)) return 4;
+   if (active & (1<<2)) return 3;
+   if (active & (1<<1)) return 2;
+   if (active & (1<<0)) return 1;
+   return 0;
+}
+
+/* Note the potential copying that occurs in the setup program:
+ */
+static void calc_sizes( struct tracker *t )
+{
+   GLuint i;
+
+   if (t->twoside) {
+      t->active[PROGRAM_OUTPUT][VERT_RESULT_COL0] |= 
+	 t->active[PROGRAM_OUTPUT][VERT_RESULT_BFC0];
+
+      t->active[PROGRAM_OUTPUT][VERT_RESULT_COL1] |= 
+	 t->active[PROGRAM_OUTPUT][VERT_RESULT_BFC1];
+   }
+
+   for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
+      switch (get_output_size(t, i)) {
+      case 4: t->size_masks[4-1] |= 1<<i;
+      case 3: t->size_masks[3-1] |= 1<<i;
+      case 2: t->size_masks[2-1] |= 1<<i;
+      case 1: t->size_masks[1-1] |= 1<<i;
+	 break;
+      }
+   }
+}
+
+static GLubyte szflag[4+1] = {
+   0,
+   0x1,
+   0x3,
+   0x7,
+   0xf
+};
+
+/* Pull a size out of the packed array:
+ */
+static GLuint get_input_size(struct brw_context *brw,
+			     GLuint attr)
+{
+   GLuint sizes_dword = brw->vb.info.sizes[attr/16];
+   GLuint sizes_bits = (sizes_dword>>((attr%16)*2)) & 0x3;
+   return sizes_bits + 1;
+}
+
+/* Calculate sizes of vertex program outputs.  Size is the largest
+ * component index which might vary from [0,0,0,1]
+ */
+static void calc_wm_input_sizes( struct brw_context *brw )
+{
+   /* BRW_NEW_VERTEX_PROGRAM */
+   struct brw_vertex_program *vp = 
+      (struct brw_vertex_program *)brw->vertex_program;
+   /* BRW_NEW_INPUT_DIMENSIONS */
+   struct tracker t;
+   GLuint insn;
+   GLuint i;
+
+   memset(&t, 0, sizeof(t));
+
+   /* _NEW_LIGHT */
+   if (brw->attribs.Light->Model.TwoSide)
+      t.twoside = 1;
+
+   for (i = 0; i < BRW_ATTRIB_MAX; i++) 
+      if (vp->program.Base.InputsRead & (1<<i))
+	 set_active_component(&t, PROGRAM_INPUT, i, 
+			      szflag[get_input_size(brw, i)]);
+      
+   for (insn = 0; insn < vp->program.Base.NumInstructions; insn++) {
+      struct prog_instruction *inst = &vp->program.Base.Instructions[insn];
+      
+      switch (inst->Opcode) {
+      case OPCODE_ARL:
+	 break;
+
+      case OPCODE_MOV:
+	 set_active(&t, inst->DstReg, get_active(&t, inst->SrcReg[0]));
+	 break;
+
+      default:
+	 set_active(&t, inst->DstReg, 0xf);
+	 break;
+      }
+   }
+
+   calc_sizes(&t);
+
+   if (memcmp(brw->wm.input_size_masks, t.size_masks, sizeof(t.size_masks)) != 0) {
+      memcpy(brw->wm.input_size_masks, t.size_masks, sizeof(t.size_masks));
+      brw->state.dirty.brw |= BRW_NEW_WM_INPUT_DIMENSIONS;
+   }
+}
+
+const struct brw_tracked_state brw_wm_input_sizes = {
+   .dirty = {
+      .mesa  = _NEW_LIGHT,
+      .brw   = BRW_NEW_VERTEX_PROGRAM | BRW_NEW_INPUT_DIMENSIONS,
+      .cache = 0
+   },
+   .update = calc_wm_input_sizes
+};
+