Add infrastructure for t_vertex.c codegen. Add an example driver

for this which spits out C code for the generated functions.

5 files changed, 865 insertions, 17 deletions

diff --git a/src/mesa/tnl/t_context.h b/src/mesa/tnl/t_context.h
index 3d099b205a0..7e1aaead885 100644
--- a/src/mesa/tnl/t_context.h
+++ b/src/mesa/tnl/t_context.h
@@ -524,6 +524,7 @@ struct tnl_pipeline {
    GLuint nr_stages;
 };
 
+struct tnl_clipspace;
 struct tnl_clipspace_attr;
 
 typedef void (*extract_func)( const struct tnl_clipspace_attr *a, GLfloat *out, 
@@ -532,6 +533,9 @@ typedef void (*extract_func)( const struct tnl_clipspace_attr *a, GLfloat *out,
 typedef void (*insert_func)( const struct tnl_clipspace_attr *a, GLubyte *v, 
 			     const GLfloat *in );
 
+typedef void (*emit_func)( GLcontext *ctx, GLuint start, 
+			   GLuint end, void *dest );
+
 
 /**
  * Describes how to convert/move a vertex attribute from a vertex array
@@ -540,6 +544,7 @@ typedef void (*insert_func)( const struct tnl_clipspace_attr *a, GLubyte *v,
 struct tnl_clipspace_attr
 {
    GLuint attrib;          /* which vertex attrib (0=position, etc) */
+   GLuint format;
    GLuint vertoffset;      /* position of the attrib in the vertex struct */
    GLuint vertattrsize;    /* size of the attribute in bytes */
    GLubyte *inputptr;
@@ -551,6 +556,40 @@ struct tnl_clipspace_attr
 };
 
 
+struct tnl_clipspace_codegen {
+   GLboolean (*emit_header)( struct tnl_clipspace_codegen *,
+			     struct tnl_clipspace *);
+   GLboolean (*emit_footer)( struct tnl_clipspace_codegen * );
+   GLboolean (*emit_attr_header)( struct tnl_clipspace_codegen *,
+				  struct tnl_clipspace_attr *,
+				  GLint j, GLenum out_type, 
+				  GLboolean need_vp );
+   GLboolean (*emit_attr_footer)( struct tnl_clipspace_codegen * );
+   GLboolean (*emit_mov)( struct tnl_clipspace_codegen *, 
+			  GLint, GLint );
+   GLboolean (*emit_const)( struct tnl_clipspace_codegen *, 
+			    GLint, GLfloat );
+   GLboolean (*emit_mad)( struct tnl_clipspace_codegen *,
+			  GLint, GLint, GLint, GLint );
+   GLboolean (*emit_float_to_chan)( struct tnl_clipspace_codegen *, 
+				    GLint, GLint );
+   GLboolean (*emit_const_chan)( struct tnl_clipspace_codegen *, 
+				 GLint, GLchan );
+   GLboolean (*emit_float_to_ubyte)( struct tnl_clipspace_codegen *, 
+				     GLint, GLint );
+   GLboolean (*emit_const_ubyte)( struct tnl_clipspace_codegen *, 
+				  GLint, GLubyte );
+   emit_func (*emit_store_func)( struct tnl_clipspace_codegen * );
+   
+   struct _tnl_dynfn codegen_list;
+   
+   char *buf;
+   int buf_size;
+   int buf_used;
+   int out_offset;
+};
+
+
 
 typedef void (*points_func)( GLcontext *ctx, GLuint first, GLuint last );
 typedef void (*line_func)( GLcontext *ctx, GLuint v1, GLuint v2 );
@@ -586,9 +625,11 @@ struct tnl_clipspace
    struct tnl_clipspace_attr attr[_TNL_ATTRIB_MAX];
    GLuint attr_count;
 
-   void (*emit)( GLcontext *ctx, GLuint start, GLuint end, void *dest );
+   emit_func emit;
    interp_func interp;
    copy_pv_func copy_pv;
+
+   struct tnl_clipspace_codegen codegen;
 };
 
 
diff --git a/src/mesa/tnl/t_vertex.c b/src/mesa/tnl/t_vertex.c
index dcb6aef16b1..0adbfede2d5 100644
--- a/src/mesa/tnl/t_vertex.c
+++ b/src/mesa/tnl/t_vertex.c
@@ -43,7 +43,6 @@
 
 
 
-#define GET_VERTEX_STATE(ctx)  &(TNL_CONTEXT(ctx)->clipspace)
 
 
 /*
@@ -587,7 +586,7 @@ static void extract_1ub_1f( const struct tnl_clipspace_attr *a, GLfloat *out, co
 }
 
 
-struct {
+static struct {
    const char *name;
    extract_func extract;
    insert_func insert[4];
@@ -859,16 +858,36 @@ static void generic_copy_pv_extras( GLcontext *ctx,
  */
 
 
-static void choose_emit_func( GLcontext *ctx,
-			      GLuint start, GLuint end,
-			      void *dest )
+static void do_emit( GLcontext *ctx, GLuint start, GLuint end,
+		     void *dest)
 {
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &tnl->vb;
    struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
-   vtx->emit = generic_emit;
+   struct tnl_clipspace_attr *a = vtx->attr;
+   const GLuint count = vtx->attr_count;
+   GLuint j;
+
+   for (j = 0; j < count; j++) {
+      GLvector4f *vptr = VB->AttribPtr[a[j].attrib];
+      a[j].inputstride = vptr->stride;
+      a[j].inputptr = ((GLubyte *)vptr->data) + start * vptr->stride;
+      a[j].emit = a[j].insert[vptr->size - 1];
+   }
+
+   vtx->emit = 0;
+   
+   if (0) 
+      vtx->emit = _tnl_codegen_emit(ctx);
+   
+   if (!vtx->emit)
+      vtx->emit = generic_emit;
+
    vtx->emit( ctx, start, end, dest );
 }
 
 
+
 static void choose_interp_func( GLcontext *ctx,
 				GLfloat t,
 				GLuint edst, GLuint eout, GLuint ein,
@@ -1000,7 +1019,7 @@ GLuint _tnl_install_attrs( GLcontext *ctx, const struct tnl_attr_map *map,
    assert(nr < _TNL_ATTRIB_MAX);
    assert(nr == 0 || map[0].attrib == VERT_ATTRIB_POS);
 
-   vtx->emit = choose_emit_func;
+   vtx->emit = 0;
    vtx->interp = choose_interp_func;
    vtx->copy_pv = choose_copy_pv_func;
    vtx->new_inputs = ~0;
@@ -1008,14 +1027,15 @@ GLuint _tnl_install_attrs( GLcontext *ctx, const struct tnl_attr_map *map,
    for (j = 0, i = 0; i < nr; i++) {
       const GLuint format = map[i].format;
       if (format == EMIT_PAD) {
-	 offset += map[i].offset;
+ 	 fprintf(stderr, "%d: pad %d, offset %d\n", i,  
+ 		 map[i].offset, offset);  
 
-/* 	 fprintf(stderr, "%d: pad %d, offset now %d\n", i,   */
-/* 		 map[i].offset, offset);   */
+	 offset += map[i].offset;
 
       }
       else {
 	 vtx->attr[j].attrib = map[i].attrib;
+	 vtx->attr[j].format = format;
 	 vtx->attr[j].vp = vp;
 	 vtx->attr[j].insert = format_info[format].insert;
 	 vtx->attr[j].extract = format_info[format].extract;
@@ -1026,8 +1046,9 @@ GLuint _tnl_install_attrs( GLcontext *ctx, const struct tnl_attr_map *map,
 	 else
 	    vtx->attr[j].vertoffset = offset;
 	 
-/* 	 fprintf(stderr, "%d: %s offset %d\n", i,  */
-/* 		 format_info[format].name, vtx->attr[j].vertoffset);   */
+ 	 fprintf(stderr, "%d: %s, vp %p, offset %d\n", i,  
+ 		 format_info[format].name, (void *)vp,
+		 vtx->attr[j].vertoffset);   
 	 
 	 offset += format_info[format].attrsize;
 	 j++;
@@ -1055,7 +1076,6 @@ void _tnl_invalidate_vertices( GLcontext *ctx, GLuint newinputs )
 }
 
 
-
 void _tnl_build_vertices( GLcontext *ctx,
 			  GLuint start,
 			  GLuint end,
@@ -1068,8 +1088,8 @@ void _tnl_build_vertices( GLcontext *ctx,
    newinputs |= vtx->new_inputs;
    vtx->new_inputs = 0;
 
-   if (newinputs)
-      vtx->emit( ctx, start, end, vDest );
+   if (newinputs) 
+      do_emit( ctx, start, end, vDest );
 }
 
 
@@ -1079,7 +1099,7 @@ void *_tnl_emit_vertices_to_buffer( GLcontext *ctx,
 				    void *dest )
 {
    struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
-   vtx->emit( ctx, start, end, dest );
+   do_emit( ctx, start, end, dest );
    return (void *)((GLubyte *)dest + vtx->vertex_size * (end - start));
 }
 
@@ -1098,6 +1118,8 @@ void _tnl_init_vertices( GLcontext *ctx,
       vtx->max_vertex_size = max_vertex_size;
       vtx->vertex_buf = (GLubyte *)ALIGN_CALLOC(vb_size * max_vertex_size, 32 );
    }
+
+   _tnl_init_c_codegen( &vtx->codegen );
 }
 
 
diff --git a/src/mesa/tnl/t_vertex.h b/src/mesa/tnl/t_vertex.h
index 8c93907c6f2..9f4847f6922 100644
--- a/src/mesa/tnl/t_vertex.h
+++ b/src/mesa/tnl/t_vertex.h
@@ -124,5 +124,24 @@ extern void _tnl_invalidate_vertices( GLcontext *ctx, GLuint newinputs );
 
 extern void _tnl_invalidate_vertex_state( GLcontext *ctx, GLuint new_state );
 
+extern emit_func _tnl_codegen_emit( GLcontext *ctx );
+
+#define REG_IN   (0<<16)
+#define REG_OUT  (1<<16)
+#define REG_VP   (2<<16)
+#define REG_TMP  (3<<16)
+#define REG_MASK (3<<16)
+
+#define REG_OFFSET_MASK  0xffff
+
+#define in( offset )  (REG_IN  | (offset))
+#define out( offset ) (REG_OUT | (offset))
+#define vp( offset )  (REG_VP  | (offset))
+#define tmp( offset ) (REG_TMP | (offset))
+
+
+extern void _tnl_init_c_codegen( struct tnl_clipspace_codegen *p );
+
+#define GET_VERTEX_STATE(ctx)  &(TNL_CONTEXT(ctx)->clipspace)
 
 #endif
diff --git a/src/mesa/tnl/t_vertex_c.c b/src/mesa/tnl/t_vertex_c.c
new file mode 100644
index 00000000000..d1ef7cd53c0
--- /dev/null
+++ b/src/mesa/tnl/t_vertex_c.c
@@ -0,0 +1,257 @@
+/*
+ * Copyright 2003 Tungsten Graphics, inc.
+ * 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
+ * TUNGSTEN GRAPHICS 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.
+ *
+ * Authors:
+ *    Keith Whitwell <[email protected]>
+ */
+
+#include "glheader.h"
+#include "context.h"
+#include "colormac.h"
+
+#include "t_context.h"
+#include "t_vertex.h"
+
+#include "simple_list.h"
+
+/* A version of code generation for t_clipspace_codegen.c which prints
+ * out 'c' code to implement the generated function.  A useful
+ * debugging tool, and in concert with something like tcc or a
+ * library-ized gcc, could do the whole job.
+ */
+
+
+static GLboolean emit( struct tnl_clipspace_codegen *p,
+		  const char *fmt,
+		  ... )
+{
+   if (p->buf_used < p->buf_size) {
+      va_list ap;
+      va_start( ap, fmt );  
+      p->buf_used += vsnprintf( p->buf + p->buf_used, 
+				p->buf_size - p->buf_used,
+				fmt, ap );   
+      va_end( ap );
+   }
+   
+   return p->buf_used < p->buf_size;
+}
+
+
+static GLboolean print_header( struct tnl_clipspace_codegen *p,
+			  struct tnl_clipspace *vtx )
+{
+   p->buf_used = 0;
+   p->out_offset = 0;
+
+   return 
+      emit(p,
+	   "struct tnl_clipspace_attr\n"
+	   "{\n"
+	   "   unsigned int attrib;          \n"
+	   "   unsigned int format;\n"
+	   "   unsigned int vertoffset;      \n"
+	   "   unsigned int vertattrsize;    \n"
+	   "   char *inputptr;\n"
+	   "   unsigned int inputstride;\n"
+	   "   void *insert;\n"
+	   "   void *emit;\n"
+	   "   void * extract;\n"
+	   "   const float *vp;   \n"
+	   "};\n"
+	   "\n"
+	 ) && 
+      emit(p, 
+	   "void emit_vertices( int start, int end, char *dest, \n"
+	   "                    struct tnl_clipspace_attr *a) \n"
+	   "{\n"
+	   "   int i;"
+	   "   for (i = start ; i < end ; i++, dest += %d) {\n",
+	   vtx->vertex_size);
+
+}
+
+static GLboolean print_footer( struct tnl_clipspace_codegen *p )
+{
+   return 
+      emit(p, 
+	   "   }\n"
+	   "}\n"
+	 );
+}
+
+static GLboolean emit_reg( struct tnl_clipspace_codegen *p, GLint reg )
+{
+   int idx = reg & REG_OFFSET_MASK;
+
+   switch (reg & REG_MASK) {
+   case REG_IN: return emit(p, "in[%d]", idx);
+   case REG_VP: return emit(p, "vp[%d]", idx);
+   case REG_TMP: return emit(p, "temp[%d]", idx); /* not used? */
+   case REG_OUT: return emit(p, "out[%d]", idx);
+   }
+   
+   return GL_FALSE;
+}
+
+static GLboolean print_mov( struct tnl_clipspace_codegen *p, GLint dest, GLint src )
+{
+   return 
+      emit(p, "         ") &&
+      emit_reg(p, dest) &&
+      emit(p, " = ") &&
+      emit_reg(p, src) &&
+      emit(p, ";\n");
+}
+
+
+static GLboolean print_const( struct tnl_clipspace_codegen *p, 
+			 GLint dest, GLfloat c )
+{
+   return 
+      emit(p, "         ") &&
+      emit_reg(p, dest) &&
+      emit(p, " = %g;\n", c);
+}
+
+static GLboolean print_const_chan( struct tnl_clipspace_codegen *p, 
+			      GLint dest, GLchan c )
+{
+   return 
+      emit(p, "         ") &&
+      emit_reg(p, dest) &&
+      emit(p, " = ") &&
+#if CHAN_TYPE == GL_FLOAT
+      emit(p, "%f", c) &&
+#else
+      emit(p, "%d", c) &&
+#endif
+      emit(p, ";\n");
+}
+
+static GLboolean print_const_ubyte( struct tnl_clipspace_codegen *p, 
+			       GLint dest, GLubyte c )
+{
+   return 
+      emit(p, "         ") &&
+      emit_reg(p, dest) &&
+      emit(p, " = %x;\n", c);
+}
+
+static GLboolean print_mad( struct tnl_clipspace_codegen *p,
+		       GLint dest, GLint src0, GLint src1, GLint src2 )
+{
+   return 
+      emit(p, "         ") &&
+      emit_reg(p, dest) &&
+      emit(p, " = ") &&
+      emit_reg(p, src0) &&
+      emit(p, " * ") &&
+      emit_reg(p, src1) &&
+      emit(p, " + ") &&
+      emit_reg(p, src2) &&
+      emit(p, ";\n");
+}
+
+static GLboolean print_float_to_ubyte( struct tnl_clipspace_codegen *p,
+				  GLint dest, GLint src )
+{
+   return 
+      emit(p, "         ") &&
+      emit(p, "UNCLAMPED_FLOAT_TO_UBYTE(") &&
+      emit_reg(p, dest) &&
+      emit(p, ", ") &&
+      emit_reg(p, src) &&
+      emit(p, ");\n");
+}
+
+static GLboolean print_float_to_chan( struct tnl_clipspace_codegen *p, 
+				 GLint dest, GLint src )
+{
+   return 
+      emit(p, "         ") &&
+      emit(p, "UNCLAMPED_FLOAT_TO_CHAN(") &&
+      emit_reg(p, dest) &&
+      emit(p, ", ") &&
+      emit_reg(p, src) &&
+      emit(p, ");\n");
+}
+
+
+static GLboolean print_attr_header( struct tnl_clipspace_codegen *p, 
+			       struct tnl_clipspace_attr *a, 
+			       GLint j,
+			       GLenum out_type, 
+			       GLboolean need_vp)
+{
+   char *out_type_str = "void";
+
+   switch(out_type) {
+   case GL_FLOAT: out_type_str = "float"; break;
+   case GL_UNSIGNED_BYTE: out_type_str = "unsigned char"; break;
+   case GL_UNSIGNED_SHORT: out_type_str = "unsigned short"; break;
+   }
+
+   return 
+      emit(p, "      {\n") &&
+      (need_vp ? emit(p, "         const float *vp = a[%d].vp;\n", j) : 1) &&
+      emit(p, "         %s *out = (%s *)(dest + %d);\n", 
+	   out_type_str, out_type_str, a[j].vertoffset) &&
+      emit(p, "         const float *in = (const float *)a[%d].inputptr;\n", 
+	   j) &&
+      emit(p, "         a[%d].inputptr += a[%d].inputstride;\n", j, j);
+}
+
+static GLboolean print_attr_footer( struct tnl_clipspace_codegen *p )
+{
+   return 
+      emit(p, "      }\n");
+}
+
+static emit_func print_store_func( struct tnl_clipspace_codegen *p ) 
+{
+   fprintf(stderr, "%s: emitted:\n%s\n", __FUNCTION__, p->buf);
+   
+   return 0;
+}
+
+void _tnl_init_c_codegen( struct tnl_clipspace_codegen *p ) 
+{
+   p->emit_header = print_header;
+   p->emit_footer = print_footer;
+   p->emit_attr_header = print_attr_header;
+   p->emit_attr_footer = print_attr_footer;
+   p->emit_mov = print_mov;
+   p->emit_const = print_const;
+   p->emit_mad = print_mad;
+   p->emit_float_to_chan = print_float_to_chan;
+   p->emit_const_chan = print_const_chan;
+   p->emit_float_to_ubyte = print_float_to_ubyte;
+   p->emit_const_ubyte = print_const_ubyte;
+   p->emit_store_func = print_store_func;
+   
+   make_empty_list(&p->codegen_list);
+
+   p->buf_size = 2048;
+   p->buf = MALLOC(p->buf_size);
+}
diff --git a/src/mesa/tnl/t_vertex_codegen.c b/src/mesa/tnl/t_vertex_codegen.c
new file mode 100644
index 00000000000..3c99b0411ea
--- /dev/null
+++ b/src/mesa/tnl/t_vertex_codegen.c
@@ -0,0 +1,509 @@
+/*
+ * Copyright 2003 Tungsten Graphics, inc.
+ * 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
+ * TUNGSTEN GRAPHICS 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.
+ *
+ * Authors:
+ *    Keith Whitwell <[email protected]>
+ */
+
+#include "glheader.h"
+#include "context.h"
+#include "colormac.h"
+
+#include "t_context.h"
+#include "t_vertex.h"
+
+#include "simple_list.h"
+
+/* Another codegen scheme, hopefully portable to a few different
+ * architectures without too much work.
+ */
+
+
+
+
+static GLboolean emit_4f_viewport_4( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mad(p, out(1), vp(5), in(1), vp(13)) &&
+      p->emit_mad(p, out(2), vp(10), in(2), vp(14)) &&
+      p->emit_mov(p, out(3), in(3));
+}
+
+static GLboolean emit_4f_viewport_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mad(p, out(1), vp(5), in(1), vp(13)) &&
+      p->emit_mad(p, out(2), vp(10), in(2), vp(14)) &&
+      p->emit_const(p, out(3), 1.0);
+}
+
+static GLboolean emit_4f_viewport_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mad(p, out(1), vp(5), in(1), vp(13)) &&
+      p->emit_mov(p, out(2), vp(14)) &&
+      p->emit_const(p, out(3), 1.0);
+}
+
+static GLboolean emit_4f_viewport_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mov(p, out(1), vp(13)) &&
+      p->emit_mov(p, out(2), vp(14)) &&
+      p->emit_const(p, out(3), 1.0);
+}
+
+static GLboolean emit_3f_viewport_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mad(p, out(1), vp(5), in(1), vp(13)) &&
+      p->emit_mad(p, out(2), vp(10), in(2), vp(14));
+}
+
+static GLboolean emit_3f_viewport_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mad(p, out(1), vp(5), in(1), vp(13)) &&
+      p->emit_mov(p, out(2), vp(14));
+}
+
+static GLboolean emit_3f_viewport_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mov(p, out(1), vp(13)) &&
+      p->emit_mov(p, out(2), vp(14));
+}
+
+static GLboolean emit_2f_viewport_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12)) &&
+      p->emit_mad(p, out(1), vp(5), in(1), vp(13));
+}
+
+static GLboolean emit_2f_viewport_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mad(p, out(0), vp(0), in(0), vp(12));
+}
+
+
+static GLboolean emit_4f_4( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0), in(0)) &&
+      p->emit_mov(p, out(1), in(1)) &&
+      p->emit_mov(p, out(2), in(2)) &&
+      p->emit_mov(p, out(3), in(3));
+}
+
+static GLboolean emit_4f_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),  in(0)) &&
+      p->emit_mov(p, out(1),  in(1)) &&
+      p->emit_mov(p, out(2),  in(2)) &&
+      p->emit_const(p, out(3), 1.0);
+}
+
+static GLboolean emit_4f_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),  in(0)) &&
+      p->emit_mov(p, out(1),  in(1)) &&
+      p->emit_const(p, out(2), 0.0) &&
+      p->emit_const(p, out(3), 1.0);
+}
+
+static GLboolean emit_4f_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),  in(0)) &&
+      p->emit_const(p, out(1), 0.0) &&
+      p->emit_const(p, out(2), 0.0) &&
+      p->emit_const(p, out(3), 1.0);
+}
+
+static GLboolean emit_3f_xyw_4( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0), in(0)) &&
+      p->emit_mov(p, out(1), in(1)) &&
+      p->emit_mov(p, out(2), in(3));
+}
+
+static GLboolean emit_3f_xyw_err( struct tnl_clipspace_codegen *p )
+{
+   assert(0);
+   return GL_FALSE;
+}
+
+static GLboolean emit_3f_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0), in(0)) &&
+      p->emit_mov(p, out(1), in(1)) &&
+      p->emit_mov(p, out(2), in(2));
+}
+
+static GLboolean emit_3f_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),   in(0)) &&
+      p->emit_mov(p, out(1),   in(1)) &&
+      p->emit_const(p, out(2), 0.0);
+}
+
+static GLboolean emit_3f_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),  in(0)) &&
+      p->emit_const(p, out(1),  0.0) &&
+      p->emit_const(p, out(2),  0.0);
+}
+
+
+static GLboolean emit_2f_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),  in(0)) &&
+      p->emit_mov(p, out(1),  in(1));
+}
+
+static GLboolean emit_2f_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),  in(0)) &&
+      p->emit_const(p, out(1),  0.0);
+}
+
+static GLboolean emit_1f_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_mov(p, out(0),  in(0));
+}
+
+static GLboolean emit_4chan_4f_rgba_4( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_chan(p, out(0), in(0)) && 
+      p->emit_float_to_chan(p, out(1), in(1)) && 
+      p->emit_float_to_chan(p, out(2), in(2)) && 
+      p->emit_float_to_chan(p, out(3), in(3));
+}
+
+static GLboolean emit_4chan_4f_rgba_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_chan(p, out(0), in(0)) && 
+      p->emit_float_to_chan(p, out(1), in(1)) && 
+      p->emit_float_to_chan(p, out(2), in(2)) && 
+      p->emit_const_chan(p, out(3), CHAN_MAX);
+}
+
+static GLboolean emit_4chan_4f_rgba_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_chan(p, out(0), in(0)) && 
+      p->emit_float_to_chan(p, out(1), in(1)) && 
+      p->emit_const_chan(p, out(2), 0) &&
+      p->emit_const_chan(p, out(3), CHAN_MAX);
+}
+
+static GLboolean emit_4chan_4f_rgba_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_chan(p, out(0), in(0)) && 
+      p->emit_const_chan(p, out(1), 0) &&
+      p->emit_const_chan(p, out(2), 0) &&  
+      p->emit_const_chan(p, out(3), CHAN_MAX);
+}
+
+static GLboolean emit_4ub_4f_rgba_4( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_float_to_ubyte(p, out(2), in(2)) &&
+      p->emit_float_to_ubyte(p, out(3), in(3));
+}
+
+static GLboolean emit_4ub_4f_rgba_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_float_to_ubyte(p, out(2), in(2)) &&
+      p->emit_const_ubyte(p, out(3), 0xff);
+}
+
+static GLboolean emit_4ub_4f_rgba_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_const_ubyte(p, out(2), 0) &&
+      p->emit_const_ubyte(p, out(3), 0xff);
+}
+
+static GLboolean emit_4ub_4f_rgba_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0)) &&
+      p->emit_const_ubyte(p, out(1), 0) &&
+      p->emit_const_ubyte(p, out(2), 0) &&
+      p->emit_const_ubyte(p, out(3), 0xff);
+}
+
+static GLboolean emit_4ub_4f_bgra_4( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(2), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_float_to_ubyte(p, out(0), in(2)) &&
+      p->emit_float_to_ubyte(p, out(3), in(3));
+}
+
+static GLboolean emit_4ub_4f_bgra_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(2), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_float_to_ubyte(p, out(0), in(2)) &&
+      p->emit_const_ubyte(p, out(3), 0xff);
+}
+
+static GLboolean emit_4ub_4f_bgra_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(2), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_const_ubyte(p, out(0), 0) &&
+      p->emit_const_ubyte(p, out(3), 0xff);
+}
+
+static GLboolean emit_4ub_4f_bgra_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(2), in(0)) &&
+      p->emit_const_ubyte(p, out(1), 0) &&
+      p->emit_const_ubyte(p, out(0), 0) &&
+      p->emit_const_ubyte(p, out(3), 0xff);
+}
+
+static GLboolean emit_3ub_3f_rgb_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_float_to_ubyte(p, out(2), in(2));
+}
+
+static GLboolean emit_3ub_3f_rgb_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_const_ubyte(p, out(2), 0);
+}
+
+static GLboolean emit_3ub_3f_rgb_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0)) &&
+      p->emit_const_ubyte(p, out(1), 0) &&
+      p->emit_const_ubyte(p, out(2), 0);
+}
+
+static GLboolean emit_3ub_3f_bgr_3( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(2), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_float_to_ubyte(p, out(0), in(2));
+}
+
+static GLboolean emit_3ub_3f_bgr_2( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(2), in(0)) &&
+      p->emit_float_to_ubyte(p, out(1), in(1)) &&
+      p->emit_const_ubyte(p, out(0), 0);
+}
+
+static GLboolean emit_3ub_3f_bgr_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(2), in(0)) &&
+      p->emit_const_ubyte(p, out(1), 0) &&
+      p->emit_const_ubyte(p, out(0), 0);
+}
+
+
+static GLboolean emit_1ub_1f_1( struct tnl_clipspace_codegen *p )
+{
+   return 
+      p->emit_float_to_ubyte(p, out(0), in(0));
+}
+
+
+
+
+static struct {
+   const char *name;
+   GLenum out_type;
+   GLboolean need_vp;
+   GLboolean (*emit[4])( struct tnl_clipspace_codegen * );
+} emit_info[EMIT_MAX] = {
+
+   { "1f", GL_FLOAT, GL_FALSE,
+     { emit_1f_1, emit_1f_1, emit_1f_1, emit_1f_1 } },
+
+   { "2f", GL_FLOAT, GL_FALSE,
+     { emit_2f_1, emit_2f_2, emit_2f_2, emit_2f_2 } },
+
+   { "3f", GL_FLOAT, GL_FALSE,
+     { emit_3f_1, emit_3f_2, emit_3f_3, emit_3f_3 } },
+
+   { "4f", GL_FLOAT, GL_FALSE,
+     { emit_4f_1, emit_4f_2, emit_4f_3, emit_4f_4 } },
+
+   { "2f_viewport", GL_FLOAT, GL_TRUE,
+     { emit_2f_viewport_1, emit_2f_viewport_2, emit_2f_viewport_2,
+       emit_2f_viewport_2 } },
+
+   { "3f_viewport", GL_FLOAT, GL_TRUE,
+     { emit_3f_viewport_1, emit_3f_viewport_2, emit_3f_viewport_3,
+       emit_3f_viewport_3 } },
+
+   { "4f_viewport", GL_FLOAT, GL_TRUE,
+     { emit_4f_viewport_1, emit_4f_viewport_2, emit_4f_viewport_3,
+       emit_4f_viewport_4 } },
+
+   { "3f_xyw", GL_FLOAT, GL_FALSE,
+     { emit_3f_xyw_err, emit_3f_xyw_err, emit_3f_xyw_err, 
+       emit_3f_xyw_4 } },
+
+   { "1ub_1f", GL_UNSIGNED_BYTE, GL_FALSE,
+     { emit_1ub_1f_1, emit_1ub_1f_1, emit_1ub_1f_1, emit_1ub_1f_1 } },
+
+   { "3ub_3f_rgb", GL_UNSIGNED_BYTE, GL_FALSE,
+     { emit_3ub_3f_rgb_1, emit_3ub_3f_rgb_2, emit_3ub_3f_rgb_3,
+       emit_3ub_3f_rgb_3 } },
+
+   { "3ub_3f_bgr", GL_UNSIGNED_BYTE, GL_FALSE,
+     { emit_3ub_3f_bgr_1, emit_3ub_3f_bgr_2, emit_3ub_3f_bgr_3,
+       emit_3ub_3f_bgr_3 } },
+
+   { "4ub_4f_rgba", GL_UNSIGNED_BYTE, GL_FALSE,
+     { emit_4ub_4f_rgba_1, emit_4ub_4f_rgba_2, emit_4ub_4f_rgba_3, 
+       emit_4ub_4f_rgba_4 } },
+
+   { "4ub_4f_bgra", GL_UNSIGNED_BYTE, GL_FALSE,
+     { emit_4ub_4f_bgra_1, emit_4ub_4f_bgra_2, emit_4ub_4f_bgra_3,
+       emit_4ub_4f_bgra_4 } },
+
+   { "4chan_4f_rgba", CHAN_TYPE, GL_FALSE,
+     { emit_4chan_4f_rgba_1, emit_4chan_4f_rgba_2, emit_4chan_4f_rgba_3,
+       emit_4chan_4f_rgba_4 } },
+
+   { "pad", 0, 0,
+     { 0, 0, 0, 0 } }
+
+};
+     
+
+/***********************************************************************
+ * list(attrib, size) --> function
+ *
+ * Because of the dependence of size, this all has to take place after
+ * the pipeline has been run.
+ */
+
+emit_func _tnl_codegen_emit( GLcontext *ctx )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
+   struct tnl_clipspace_attr *a = vtx->attr;
+   struct tnl_clipspace_codegen *p = &vtx->codegen;
+   const GLuint count = vtx->attr_count;
+   GLuint j;
+
+   /* Need a faster lookup, or is this linear scan of an MRU list good
+    * enough?  MRU chosen based on the guess that consecutive VB's are
+    * likely to be of the same format.  A hash of attributes and sizes
+    * might be a better technique.
+    *
+    * With the vtx code now in place, it should be possible to track
+    * changes to the sizes of input arrays (and state, of course) and
+    * only invalidate this function when those sizes have changed.
+    */
+#if 0
+   foreach (l, p->codegen_list) {
+      if (l->attr_count != count) 
+	 continue;
+
+      /* Assumptions:  
+       *    a[j].vp will not change for a given attrib
+       *    a[j].vertex_offset will not change nothing else has changed.
+       */
+      for (j = 0; j < count; j++) 
+	 if (a[j].attrib != l->a[j].attrib ||
+	     a[j].sz != l->a[j].sz) 
+	    break;
+	 
+      if (j == count) {
+	 move_to_head(l, p->codegen_list);
+	 return l->func;
+      }
+   }
+#endif
+
+   p->emit_header( p, vtx );
+
+   for (j = 0; j < count; j++) {
+      GLuint sz = VB->AttribPtr[a[j].attrib]->size - 1;
+      p->emit_attr_header( p, a, j, 
+			   emit_info[a[j].format].out_type,
+			   emit_info[a[j].format].need_vp );
+
+      if (!emit_info[a[j].format].emit[sz]( p )) {
+	 fprintf(stderr, "codegen failed\n");
+	 return 0;
+      }
+
+      p->emit_attr_footer( p );
+   }
+   
+   p->emit_footer( p );
+   
+   return p->emit_store_func( p );
+}
+