xserver and mesa git update 28-12-2010

1 files changed, 1679 insertions, 1679 deletions

diff --git a/mesalib/src/mesa/main/ffvertex_prog.c b/mesalib/src/mesa/main/ffvertex_prog.c
index 92fec09ba..60b200419 100644
--- a/mesalib/src/mesa/main/ffvertex_prog.c
+++ b/mesalib/src/mesa/main/ffvertex_prog.c
@@ -1,1679 +1,1679 @@
-/**************************************************************************
- *
- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
- * 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 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 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.
- *
- **************************************************************************/
-
-/**
- * \file ffvertex_prog.c
- *
- * Create a vertex program to execute the current fixed function T&L pipeline.
- * \author Keith Whitwell
- */
-
-
-#include "main/glheader.h"
-#include "main/mtypes.h"
-#include "main/macros.h"
-#include "main/enums.h"
-#include "main/ffvertex_prog.h"
-#include "program/program.h"
-#include "program/prog_cache.h"
-#include "program/prog_instruction.h"
-#include "program/prog_parameter.h"
-#include "program/prog_print.h"
-#include "program/prog_statevars.h"
-
-
-/** Max of number of lights and texture coord units */
-#define NUM_UNITS MAX2(MAX_TEXTURE_COORD_UNITS, MAX_LIGHTS)
-
-struct state_key {
-   unsigned light_color_material_mask:12;
-   unsigned light_global_enabled:1;
-   unsigned light_local_viewer:1;
-   unsigned light_twoside:1;
-   unsigned material_shininess_is_zero:1;
-   unsigned need_eye_coords:1;
-   unsigned normalize:1;
-   unsigned rescale_normals:1;
-
-   unsigned fog_source_is_depth:1;
-   unsigned separate_specular:1;
-   unsigned point_attenuated:1;
-   unsigned point_array:1;
-   unsigned texture_enabled_global:1;
-   unsigned fragprog_inputs_read:12;
-
-   unsigned varying_vp_inputs;
-
-   struct {
-      unsigned light_enabled:1;
-      unsigned light_eyepos3_is_zero:1;
-      unsigned light_spotcutoff_is_180:1;
-      unsigned light_attenuated:1;
-      unsigned texunit_really_enabled:1;
-      unsigned texmat_enabled:1;
-      unsigned coord_replace:1;
-      unsigned texgen_enabled:4;
-      unsigned texgen_mode0:4;
-      unsigned texgen_mode1:4;
-      unsigned texgen_mode2:4;
-      unsigned texgen_mode3:4;
-   } unit[NUM_UNITS];
-};
-
-
-#define TXG_NONE           0
-#define TXG_OBJ_LINEAR     1
-#define TXG_EYE_LINEAR     2
-#define TXG_SPHERE_MAP     3
-#define TXG_REFLECTION_MAP 4
-#define TXG_NORMAL_MAP     5
-
-static GLuint translate_texgen( GLboolean enabled, GLenum mode )
-{
-   if (!enabled)
-      return TXG_NONE;
-
-   switch (mode) {
-   case GL_OBJECT_LINEAR: return TXG_OBJ_LINEAR;
-   case GL_EYE_LINEAR: return TXG_EYE_LINEAR;
-   case GL_SPHERE_MAP: return TXG_SPHERE_MAP;
-   case GL_REFLECTION_MAP_NV: return TXG_REFLECTION_MAP;
-   case GL_NORMAL_MAP_NV: return TXG_NORMAL_MAP;
-   default: return TXG_NONE;
-   }
-}
-
-
-
-static GLboolean check_active_shininess( GLcontext *ctx,
-                                         const struct state_key *key,
-                                         GLuint side )
-{
-   GLuint bit = 1 << (MAT_ATTRIB_FRONT_SHININESS + side);
-
-   if ((key->varying_vp_inputs & VERT_BIT_COLOR0) &&
-       (key->light_color_material_mask & bit))
-      return GL_TRUE;
-
-   if (key->varying_vp_inputs & (bit << 16))
-      return GL_TRUE;
-
-   if (ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SHININESS + side][0] != 0.0F)
-      return GL_TRUE;
-
-   return GL_FALSE;
-}
-
-
-static void make_state_key( GLcontext *ctx, struct state_key *key )
-{
-   const struct gl_fragment_program *fp;
-   GLuint i;
-
-   memset(key, 0, sizeof(struct state_key));
-   fp = ctx->FragmentProgram._Current;
-
-   /* This now relies on texenvprogram.c being active:
-    */
-   assert(fp);
-
-   key->need_eye_coords = ctx->_NeedEyeCoords;
-
-   key->fragprog_inputs_read = fp->Base.InputsRead;
-   key->varying_vp_inputs = ctx->varying_vp_inputs;
-
-   if (ctx->RenderMode == GL_FEEDBACK) {
-      /* make sure the vertprog emits color and tex0 */
-      key->fragprog_inputs_read |= (FRAG_BIT_COL0 | FRAG_BIT_TEX0);
-   }
-
-   key->separate_specular = (ctx->Light.Model.ColorControl ==
-			     GL_SEPARATE_SPECULAR_COLOR);
-
-   if (ctx->Light.Enabled) {
-      key->light_global_enabled = 1;
-
-      if (ctx->Light.Model.LocalViewer)
-	 key->light_local_viewer = 1;
-
-      if (ctx->Light.Model.TwoSide)
-	 key->light_twoside = 1;
-
-      if (ctx->Light.ColorMaterialEnabled) {
-	 key->light_color_material_mask = ctx->Light.ColorMaterialBitmask;
-      }
-
-      for (i = 0; i < MAX_LIGHTS; i++) {
-	 struct gl_light *light = &ctx->Light.Light[i];
-
-	 if (light->Enabled) {
-	    key->unit[i].light_enabled = 1;
-
-	    if (light->EyePosition[3] == 0.0)
-	       key->unit[i].light_eyepos3_is_zero = 1;
-
-	    if (light->SpotCutoff == 180.0)
-	       key->unit[i].light_spotcutoff_is_180 = 1;
-
-	    if (light->ConstantAttenuation != 1.0 ||
-		light->LinearAttenuation != 0.0 ||
-		light->QuadraticAttenuation != 0.0)
-	       key->unit[i].light_attenuated = 1;
-	 }
-      }
-
-      if (check_active_shininess(ctx, key, 0)) {
-         key->material_shininess_is_zero = 0;
-      }
-      else if (key->light_twoside &&
-               check_active_shininess(ctx, key, 1)) {
-         key->material_shininess_is_zero = 0;
-      }
-      else {
-         key->material_shininess_is_zero = 1;
-      }
-   }
-
-   if (ctx->Transform.Normalize)
-      key->normalize = 1;
-
-   if (ctx->Transform.RescaleNormals)
-      key->rescale_normals = 1;
-
-   if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT)
-      key->fog_source_is_depth = 1;
-
-   if (ctx->Point._Attenuated)
-      key->point_attenuated = 1;
-
-#if FEATURE_point_size_array
-   if (ctx->Array.ArrayObj->PointSize.Enabled)
-      key->point_array = 1;
-#endif
-
-   if (ctx->Texture._TexGenEnabled ||
-       ctx->Texture._TexMatEnabled ||
-       ctx->Texture._EnabledUnits)
-      key->texture_enabled_global = 1;
-
-   for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
-      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
-
-      if (texUnit->_ReallyEnabled)
-	 key->unit[i].texunit_really_enabled = 1;
-
-      if (ctx->Point.PointSprite)
-	 if (ctx->Point.CoordReplace[i])
-	    key->unit[i].coord_replace = 1;
-
-      if (ctx->Texture._TexMatEnabled & ENABLE_TEXMAT(i))
-	 key->unit[i].texmat_enabled = 1;
-
-      if (texUnit->TexGenEnabled) {
-	 key->unit[i].texgen_enabled = 1;
-
-	 key->unit[i].texgen_mode0 =
-	    translate_texgen( texUnit->TexGenEnabled & (1<<0),
-			      texUnit->GenS.Mode );
-	 key->unit[i].texgen_mode1 =
-	    translate_texgen( texUnit->TexGenEnabled & (1<<1),
-			      texUnit->GenT.Mode );
-	 key->unit[i].texgen_mode2 =
-	    translate_texgen( texUnit->TexGenEnabled & (1<<2),
-			      texUnit->GenR.Mode );
-	 key->unit[i].texgen_mode3 =
-	    translate_texgen( texUnit->TexGenEnabled & (1<<3),
-			      texUnit->GenQ.Mode );
-      }
-   }
-}
-
-
-
-/* Very useful debugging tool - produces annotated listing of
- * generated program with line/function references for each
- * instruction back into this file:
- */
-#define DISASSEM 0
-
-
-/* Use uregs to represent registers internally, translate to Mesa's
- * expected formats on emit.
- *
- * NOTE: These are passed by value extensively in this file rather
- * than as usual by pointer reference.  If this disturbs you, try
- * remembering they are just 32bits in size.
- *
- * GCC is smart enough to deal with these dword-sized structures in
- * much the same way as if I had defined them as dwords and was using
- * macros to access and set the fields.  This is much nicer and easier
- * to evolve.
- */
-struct ureg {
-   GLuint file:4;
-   GLint idx:9;      /* relative addressing may be negative */
-                     /* sizeof(idx) should == sizeof(prog_src_reg::Index) */
-   GLuint negate:1;
-   GLuint swz:12;
-   GLuint pad:6;
-};
-
-
-struct tnl_program {
-   const struct state_key *state;
-   struct gl_vertex_program *program;
-   GLint max_inst;  /** number of instructions allocated for program */
-   GLboolean mvp_with_dp4;
-
-   GLuint temp_in_use;
-   GLuint temp_reserved;
-
-   struct ureg eye_position;
-   struct ureg eye_position_z;
-   struct ureg eye_position_normalized;
-   struct ureg transformed_normal;
-   struct ureg identity;
-
-   GLuint materials;
-   GLuint color_materials;
-};
-
-
-static const struct ureg undef = {
-   PROGRAM_UNDEFINED,
-   0,
-   0,
-   0,
-   0
-};
-
-/* Local shorthand:
- */
-#define X    SWIZZLE_X
-#define Y    SWIZZLE_Y
-#define Z    SWIZZLE_Z
-#define W    SWIZZLE_W
-
-
-/* Construct a ureg:
- */
-static struct ureg make_ureg(GLuint file, GLint idx)
-{
-   struct ureg reg;
-   reg.file = file;
-   reg.idx = idx;
-   reg.negate = 0;
-   reg.swz = SWIZZLE_NOOP;
-   reg.pad = 0;
-   return reg;
-}
-
-
-
-static struct ureg negate( struct ureg reg )
-{
-   reg.negate ^= 1;
-   return reg;
-}
-
-
-static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )
-{
-   reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),
-			   GET_SWZ(reg.swz, y),
-			   GET_SWZ(reg.swz, z),
-			   GET_SWZ(reg.swz, w));
-   return reg;
-}
-
-
-static struct ureg swizzle1( struct ureg reg, int x )
-{
-   return swizzle(reg, x, x, x, x);
-}
-
-
-static struct ureg get_temp( struct tnl_program *p )
-{
-   int bit = _mesa_ffs( ~p->temp_in_use );
-   if (!bit) {
-      _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);
-      exit(1);
-   }
-
-   if ((GLuint) bit > p->program->Base.NumTemporaries)
-      p->program->Base.NumTemporaries = bit;
-
-   p->temp_in_use |= 1<<(bit-1);
-   return make_ureg(PROGRAM_TEMPORARY, bit-1);
-}
-
-
-static struct ureg reserve_temp( struct tnl_program *p )
-{
-   struct ureg temp = get_temp( p );
-   p->temp_reserved |= 1<<temp.idx;
-   return temp;
-}
-
-
-static void release_temp( struct tnl_program *p, struct ureg reg )
-{
-   if (reg.file == PROGRAM_TEMPORARY) {
-      p->temp_in_use &= ~(1<<reg.idx);
-      p->temp_in_use |= p->temp_reserved; /* can't release reserved temps */
-   }
-}
-
-static void release_temps( struct tnl_program *p )
-{
-   p->temp_in_use = p->temp_reserved;
-}
-
-
-static struct ureg register_param5(struct tnl_program *p,
-				   GLint s0,
-				   GLint s1,
-				   GLint s2,
-				   GLint s3,
-                                   GLint s4)
-{
-   gl_state_index tokens[STATE_LENGTH];
-   GLint idx;
-   tokens[0] = s0;
-   tokens[1] = s1;
-   tokens[2] = s2;
-   tokens[3] = s3;
-   tokens[4] = s4;
-   idx = _mesa_add_state_reference( p->program->Base.Parameters, tokens );
-   return make_ureg(PROGRAM_STATE_VAR, idx);
-}
-
-
-#define register_param1(p,s0)          register_param5(p,s0,0,0,0,0)
-#define register_param2(p,s0,s1)       register_param5(p,s0,s1,0,0,0)
-#define register_param3(p,s0,s1,s2)    register_param5(p,s0,s1,s2,0,0)
-#define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)
-
-
-
-/**
- * \param input  one of VERT_ATTRIB_x tokens.
- */
-static struct ureg register_input( struct tnl_program *p, GLuint input )
-{
-   assert(input < 32);
-
-   if (p->state->varying_vp_inputs & (1<<input)) {
-      p->program->Base.InputsRead |= (1<<input);
-      return make_ureg(PROGRAM_INPUT, input);
-   }
-   else {
-      return register_param3( p, STATE_INTERNAL, STATE_CURRENT_ATTRIB, input );
-   }
-}
-
-
-/**
- * \param input  one of VERT_RESULT_x tokens.
- */
-static struct ureg register_output( struct tnl_program *p, GLuint output )
-{
-   p->program->Base.OutputsWritten |= BITFIELD64_BIT(output);
-   return make_ureg(PROGRAM_OUTPUT, output);
-}
-
-
-static struct ureg register_const4f( struct tnl_program *p,
-			      GLfloat s0,
-			      GLfloat s1,
-			      GLfloat s2,
-			      GLfloat s3)
-{
-   GLfloat values[4];
-   GLint idx;
-   GLuint swizzle;
-   values[0] = s0;
-   values[1] = s1;
-   values[2] = s2;
-   values[3] = s3;
-   idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,
-                                     &swizzle );
-   ASSERT(swizzle == SWIZZLE_NOOP);
-   return make_ureg(PROGRAM_CONSTANT, idx);
-}
-
-#define register_const1f(p, s0)         register_const4f(p, s0, 0, 0, 1)
-#define register_scalar_const(p, s0)    register_const4f(p, s0, s0, s0, s0)
-#define register_const2f(p, s0, s1)     register_const4f(p, s0, s1, 0, 1)
-#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
-
-static GLboolean is_undef( struct ureg reg )
-{
-   return reg.file == PROGRAM_UNDEFINED;
-}
-
-
-static struct ureg get_identity_param( struct tnl_program *p )
-{
-   if (is_undef(p->identity))
-      p->identity = register_const4f(p, 0,0,0,1);
-
-   return p->identity;
-}
-
-static void register_matrix_param5( struct tnl_program *p,
-				    GLint s0, /* modelview, projection, etc */
-				    GLint s1, /* texture matrix number */
-				    GLint s2, /* first row */
-				    GLint s3, /* last row */
-				    GLint s4, /* inverse, transpose, etc */
-				    struct ureg *matrix )
-{
-   GLint i;
-
-   /* This is a bit sad as the support is there to pull the whole
-    * matrix out in one go:
-    */
-   for (i = 0; i <= s3 - s2; i++)
-      matrix[i] = register_param5( p, s0, s1, i, i, s4 );
-}
-
-
-static void emit_arg( struct prog_src_register *src,
-		      struct ureg reg )
-{
-   src->File = reg.file;
-   src->Index = reg.idx;
-   src->Swizzle = reg.swz;
-   src->Negate = reg.negate ? NEGATE_XYZW : NEGATE_NONE;
-   src->Abs = 0;
-   src->RelAddr = 0;
-   /* Check that bitfield sizes aren't exceeded */
-   ASSERT(src->Index == reg.idx);
-}
-
-
-static void emit_dst( struct prog_dst_register *dst,
-		      struct ureg reg, GLuint mask )
-{
-   dst->File = reg.file;
-   dst->Index = reg.idx;
-   /* allow zero as a shorthand for xyzw */
-   dst->WriteMask = mask ? mask : WRITEMASK_XYZW;
-   dst->CondMask = COND_TR;  /* always pass cond test */
-   dst->CondSwizzle = SWIZZLE_NOOP;
-   dst->CondSrc = 0;
-   /* Check that bitfield sizes aren't exceeded */
-   ASSERT(dst->Index == reg.idx);
-}
-
-
-static void debug_insn( struct prog_instruction *inst, const char *fn,
-			GLuint line )
-{
-   if (DISASSEM) {
-      static const char *last_fn;
-
-      if (fn != last_fn) {
-	 last_fn = fn;
-	 printf("%s:\n", fn);
-      }
-
-      printf("%d:\t", line);
-      _mesa_print_instruction(inst);
-   }
-}
-
-
-static void emit_op3fn(struct tnl_program *p,
-                       enum prog_opcode op,
-		       struct ureg dest,
-		       GLuint mask,
-		       struct ureg src0,
-		       struct ureg src1,
-		       struct ureg src2,
-		       const char *fn,
-		       GLuint line)
-{
-   GLuint nr;
-   struct prog_instruction *inst;
-
-   assert((GLint) p->program->Base.NumInstructions <= p->max_inst);
-
-   if (p->program->Base.NumInstructions == p->max_inst) {
-      /* need to extend the program's instruction array */
-      struct prog_instruction *newInst;
-
-      /* double the size */
-      p->max_inst *= 2;
-
-      newInst = _mesa_alloc_instructions(p->max_inst);
-      if (!newInst) {
-         _mesa_error(NULL, GL_OUT_OF_MEMORY, "vertex program build");
-         return;
-      }
-
-      _mesa_copy_instructions(newInst,
-                              p->program->Base.Instructions,
-                              p->program->Base.NumInstructions);
-
-      _mesa_free_instructions(p->program->Base.Instructions,
-                              p->program->Base.NumInstructions);
-
-      p->program->Base.Instructions = newInst;
-   }
-
-   nr = p->program->Base.NumInstructions++;
-
-   inst = &p->program->Base.Instructions[nr];
-   inst->Opcode = (enum prog_opcode) op;
-   inst->Data = 0;
-
-   emit_arg( &inst->SrcReg[0], src0 );
-   emit_arg( &inst->SrcReg[1], src1 );
-   emit_arg( &inst->SrcReg[2], src2 );
-
-   emit_dst( &inst->DstReg, dest, mask );
-
-   debug_insn(inst, fn, line);
-}
-
-
-#define emit_op3(p, op, dst, mask, src0, src1, src2) \
-   emit_op3fn(p, op, dst, mask, src0, src1, src2, __FUNCTION__, __LINE__)
-
-#define emit_op2(p, op, dst, mask, src0, src1) \
-    emit_op3fn(p, op, dst, mask, src0, src1, undef, __FUNCTION__, __LINE__)
-
-#define emit_op1(p, op, dst, mask, src0) \
-    emit_op3fn(p, op, dst, mask, src0, undef, undef, __FUNCTION__, __LINE__)
-
-
-static struct ureg make_temp( struct tnl_program *p, struct ureg reg )
-{
-   if (reg.file == PROGRAM_TEMPORARY &&
-       !(p->temp_reserved & (1<<reg.idx)))
-      return reg;
-   else {
-      struct ureg temp = get_temp(p);
-      emit_op1(p, OPCODE_MOV, temp, 0, reg);
-      return temp;
-   }
-}
-
-
-/* Currently no tracking performed of input/output/register size or
- * active elements.  Could be used to reduce these operations, as
- * could the matrix type.
- */
-static void emit_matrix_transform_vec4( struct tnl_program *p,
-					struct ureg dest,
-					const struct ureg *mat,
-					struct ureg src)
-{
-   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_X, src, mat[0]);
-   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Y, src, mat[1]);
-   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Z, src, mat[2]);
-   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_W, src, mat[3]);
-}
-
-
-/* This version is much easier to implement if writemasks are not
- * supported natively on the target or (like SSE), the target doesn't
- * have a clean/obvious dotproduct implementation.
- */
-static void emit_transpose_matrix_transform_vec4( struct tnl_program *p,
-						  struct ureg dest,
-						  const struct ureg *mat,
-						  struct ureg src)
-{
-   struct ureg tmp;
-
-   if (dest.file != PROGRAM_TEMPORARY)
-      tmp = get_temp(p);
-   else
-      tmp = dest;
-
-   emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]);
-   emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp);
-   emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp);
-   emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp);
-
-   if (dest.file != PROGRAM_TEMPORARY)
-      release_temp(p, tmp);
-}
-
-
-static void emit_matrix_transform_vec3( struct tnl_program *p,
-					struct ureg dest,
-					const struct ureg *mat,
-					struct ureg src)
-{
-   emit_op2(p, OPCODE_DP3, dest, WRITEMASK_X, src, mat[0]);
-   emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Y, src, mat[1]);
-   emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Z, src, mat[2]);
-}
-
-
-static void emit_normalize_vec3( struct tnl_program *p,
-				 struct ureg dest,
-				 struct ureg src )
-{
-#if 0
-   /* XXX use this when drivers are ready for NRM3 */
-   emit_op1(p, OPCODE_NRM3, dest, WRITEMASK_XYZ, src);
-#else
-   struct ureg tmp = get_temp(p);
-   emit_op2(p, OPCODE_DP3, tmp, WRITEMASK_X, src, src);
-   emit_op1(p, OPCODE_RSQ, tmp, WRITEMASK_X, tmp);
-   emit_op2(p, OPCODE_MUL, dest, 0, src, swizzle1(tmp, X));
-   release_temp(p, tmp);
-#endif
-}
-
-
-static void emit_passthrough( struct tnl_program *p,
-			      GLuint input,
-			      GLuint output )
-{
-   struct ureg out = register_output(p, output);
-   emit_op1(p, OPCODE_MOV, out, 0, register_input(p, input));
-}
-
-
-static struct ureg get_eye_position( struct tnl_program *p )
-{
-   if (is_undef(p->eye_position)) {
-      struct ureg pos = register_input( p, VERT_ATTRIB_POS );
-      struct ureg modelview[4];
-
-      p->eye_position = reserve_temp(p);
-
-      if (p->mvp_with_dp4) {
-	 register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
-                                 0, modelview );
-
-	 emit_matrix_transform_vec4(p, p->eye_position, modelview, pos);
-      }
-      else {
-	 register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
-				 STATE_MATRIX_TRANSPOSE, modelview );
-
-	 emit_transpose_matrix_transform_vec4(p, p->eye_position, modelview, pos);
-      }
-   }
-
-   return p->eye_position;
-}
-
-
-static struct ureg get_eye_position_z( struct tnl_program *p )
-{
-   if (!is_undef(p->eye_position))
-      return swizzle1(p->eye_position, Z);
-
-   if (is_undef(p->eye_position_z)) {
-      struct ureg pos = register_input( p, VERT_ATTRIB_POS );
-      struct ureg modelview[4];
-
-      p->eye_position_z = reserve_temp(p);
-
-      register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
-                              0, modelview );
-
-      emit_op2(p, OPCODE_DP4, p->eye_position_z, 0, pos, modelview[2]);
-   }
-
-   return p->eye_position_z;
-}
-
-
-static struct ureg get_eye_position_normalized( struct tnl_program *p )
-{
-   if (is_undef(p->eye_position_normalized)) {
-      struct ureg eye = get_eye_position(p);
-      p->eye_position_normalized = reserve_temp(p);
-      emit_normalize_vec3(p, p->eye_position_normalized, eye);
-   }
-
-   return p->eye_position_normalized;
-}
-
-
-static struct ureg get_transformed_normal( struct tnl_program *p )
-{
-   if (is_undef(p->transformed_normal) &&
-       !p->state->need_eye_coords &&
-       !p->state->normalize &&
-       !(p->state->need_eye_coords == p->state->rescale_normals))
-   {
-      p->transformed_normal = register_input(p, VERT_ATTRIB_NORMAL );
-   }
-   else if (is_undef(p->transformed_normal))
-   {
-      struct ureg normal = register_input(p, VERT_ATTRIB_NORMAL );
-      struct ureg mvinv[3];
-      struct ureg transformed_normal = reserve_temp(p);
-
-      if (p->state->need_eye_coords) {
-         register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 2,
-                                 STATE_MATRIX_INVTRANS, mvinv );
-
-         /* Transform to eye space:
-          */
-         emit_matrix_transform_vec3( p, transformed_normal, mvinv, normal );
-         normal = transformed_normal;
-      }
-
-      /* Normalize/Rescale:
-       */
-      if (p->state->normalize) {
-	 emit_normalize_vec3( p, transformed_normal, normal );
-         normal = transformed_normal;
-      }
-      else if (p->state->need_eye_coords == p->state->rescale_normals) {
-         /* This is already adjusted for eye/non-eye rendering:
-          */
-	 struct ureg rescale = register_param2(p, STATE_INTERNAL,
-                                               STATE_NORMAL_SCALE);
-
-	 emit_op2( p, OPCODE_MUL, transformed_normal, 0, normal, rescale );
-         normal = transformed_normal;
-      }
-
-      assert(normal.file == PROGRAM_TEMPORARY);
-      p->transformed_normal = normal;
-   }
-
-   return p->transformed_normal;
-}
-
-
-static void build_hpos( struct tnl_program *p )
-{
-   struct ureg pos = register_input( p, VERT_ATTRIB_POS );
-   struct ureg hpos = register_output( p, VERT_RESULT_HPOS );
-   struct ureg mvp[4];
-
-   if (p->mvp_with_dp4) {
-      register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3,
-			      0, mvp );
-      emit_matrix_transform_vec4( p, hpos, mvp, pos );
-   }
-   else {
-      register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3,
-			      STATE_MATRIX_TRANSPOSE, mvp );
-      emit_transpose_matrix_transform_vec4( p, hpos, mvp, pos );
-   }
-}
-
-
-static GLuint material_attrib( GLuint side, GLuint property )
-{
-   return (property - STATE_AMBIENT) * 2 + side;
-}
-
-
-/**
- * Get a bitmask of which material values vary on a per-vertex basis.
- */
-static void set_material_flags( struct tnl_program *p )
-{
-   p->color_materials = 0;
-   p->materials = 0;
-
-   if (p->state->varying_vp_inputs & VERT_BIT_COLOR0) {
-      p->materials =
-	 p->color_materials = p->state->light_color_material_mask;
-   }
-
-   p->materials |= (p->state->varying_vp_inputs >> 16);
-}
-
-
-static struct ureg get_material( struct tnl_program *p, GLuint side,
-				 GLuint property )
-{
-   GLuint attrib = material_attrib(side, property);
-
-   if (p->color_materials & (1<<attrib))
-      return register_input(p, VERT_ATTRIB_COLOR0);
-   else if (p->materials & (1<<attrib)) {
-      /* Put material values in the GENERIC slots -- they are not used
-       * for anything in fixed function mode.
-       */
-      return register_input( p, attrib + VERT_ATTRIB_GENERIC0 );
-   }
-   else
-      return register_param3( p, STATE_MATERIAL, side, property );
-}
-
-#define SCENE_COLOR_BITS(side) (( MAT_BIT_FRONT_EMISSION | \
-				   MAT_BIT_FRONT_AMBIENT | \
-				   MAT_BIT_FRONT_DIFFUSE) << (side))
-
-
-/**
- * Either return a precalculated constant value or emit code to
- * calculate these values dynamically in the case where material calls
- * are present between begin/end pairs.
- *
- * Probably want to shift this to the program compilation phase - if
- * we always emitted the calculation here, a smart compiler could
- * detect that it was constant (given a certain set of inputs), and
- * lift it out of the main loop.  That way the programs created here
- * would be independent of the vertex_buffer details.
- */
-static struct ureg get_scenecolor( struct tnl_program *p, GLuint side )
-{
-   if (p->materials & SCENE_COLOR_BITS(side)) {
-      struct ureg lm_ambient = register_param1(p, STATE_LIGHTMODEL_AMBIENT);
-      struct ureg material_emission = get_material(p, side, STATE_EMISSION);
-      struct ureg material_ambient = get_material(p, side, STATE_AMBIENT);
-      struct ureg material_diffuse = get_material(p, side, STATE_DIFFUSE);
-      struct ureg tmp = make_temp(p, material_diffuse);
-      emit_op3(p, OPCODE_MAD, tmp, WRITEMASK_XYZ, lm_ambient,
-	       material_ambient, material_emission);
-      return tmp;
-   }
-   else
-      return register_param2( p, STATE_LIGHTMODEL_SCENECOLOR, side );
-}
-
-
-static struct ureg get_lightprod( struct tnl_program *p, GLuint light,
-				  GLuint side, GLuint property )
-{
-   GLuint attrib = material_attrib(side, property);
-   if (p->materials & (1<<attrib)) {
-      struct ureg light_value =
-	 register_param3(p, STATE_LIGHT, light, property);
-      struct ureg material_value = get_material(p, side, property);
-      struct ureg tmp = get_temp(p);
-      emit_op2(p, OPCODE_MUL, tmp, 0, light_value, material_value);
-      return tmp;
-   }
-   else
-      return register_param4(p, STATE_LIGHTPROD, light, side, property);
-}
-
-
-static struct ureg calculate_light_attenuation( struct tnl_program *p,
-						GLuint i,
-						struct ureg VPpli,
-						struct ureg dist )
-{
-   struct ureg attenuation = register_param3(p, STATE_LIGHT, i,
-					     STATE_ATTENUATION);
-   struct ureg att = get_temp(p);
-
-   /* Calculate spot attenuation:
-    */
-   if (!p->state->unit[i].light_spotcutoff_is_180) {
-      struct ureg spot_dir_norm = register_param3(p, STATE_INTERNAL,
-						  STATE_LIGHT_SPOT_DIR_NORMALIZED, i);
-      struct ureg spot = get_temp(p);
-      struct ureg slt = get_temp(p);
-
-      emit_op2(p, OPCODE_DP3, spot, 0, negate(VPpli), spot_dir_norm);
-      emit_op2(p, OPCODE_SLT, slt, 0, swizzle1(spot_dir_norm,W), spot);
-      emit_op2(p, OPCODE_POW, spot, 0, spot, swizzle1(attenuation, W));
-      emit_op2(p, OPCODE_MUL, att, 0, slt, spot);
-
-      release_temp(p, spot);
-      release_temp(p, slt);
-   }
-
-   /* Calculate distance attenuation:
-    */
-   if (p->state->unit[i].light_attenuated) {
-      /* 1/d,d,d,1/d */
-      emit_op1(p, OPCODE_RCP, dist, WRITEMASK_YZ, dist);
-      /* 1,d,d*d,1/d */
-      emit_op2(p, OPCODE_MUL, dist, WRITEMASK_XZ, dist, swizzle1(dist,Y));
-      /* 1/dist-atten */
-      emit_op2(p, OPCODE_DP3, dist, 0, attenuation, dist);
-
-      if (!p->state->unit[i].light_spotcutoff_is_180) {
-	 /* dist-atten */
-	 emit_op1(p, OPCODE_RCP, dist, 0, dist);
-	 /* spot-atten * dist-atten */
-	 emit_op2(p, OPCODE_MUL, att, 0, dist, att);
-      }
-      else {
-	 /* dist-atten */
-	 emit_op1(p, OPCODE_RCP, att, 0, dist);
-      }
-   }
-
-   return att;
-}
-
-
-/**
- * Compute:
- *   lit.y = MAX(0, dots.x)
- *   lit.z = SLT(0, dots.x)
- */
-static void emit_degenerate_lit( struct tnl_program *p,
-                                 struct ureg lit,
-                                 struct ureg dots )
-{
-   struct ureg id = get_identity_param(p);  /* id = {0,0,0,1} */
-
-   /* Note that lit.x & lit.w will not be examined.  Note also that
-    * dots.xyzw == dots.xxxx.
-    */
-
-   /* MAX lit, id, dots;
-    */
-   emit_op2(p, OPCODE_MAX, lit, WRITEMASK_XYZW, id, dots);
-
-   /* result[2] = (in > 0 ? 1 : 0)
-    * SLT lit.z, id.z, dots;   # lit.z = (0 < dots.z) ? 1 : 0
-    */
-   emit_op2(p, OPCODE_SLT, lit, WRITEMASK_Z, swizzle1(id,Z), dots);
-}
-
-
-/* Need to add some addtional parameters to allow lighting in object
- * space - STATE_SPOT_DIRECTION and STATE_HALF_VECTOR implicitly assume eye
- * space lighting.
- */
-static void build_lighting( struct tnl_program *p )
-{
-   const GLboolean twoside = p->state->light_twoside;
-   const GLboolean separate = p->state->separate_specular;
-   GLuint nr_lights = 0, count = 0;
-   struct ureg normal = get_transformed_normal(p);
-   struct ureg lit = get_temp(p);
-   struct ureg dots = get_temp(p);
-   struct ureg _col0 = undef, _col1 = undef;
-   struct ureg _bfc0 = undef, _bfc1 = undef;
-   GLuint i;
-
-   /*
-    * NOTE:
-    * dots.x = dot(normal, VPpli)
-    * dots.y = dot(normal, halfAngle)
-    * dots.z = back.shininess
-    * dots.w = front.shininess
-    */
-
-   for (i = 0; i < MAX_LIGHTS; i++)
-      if (p->state->unit[i].light_enabled)
-	 nr_lights++;
-
-   set_material_flags(p);
-
-   {
-      if (!p->state->material_shininess_is_zero) {
-         struct ureg shininess = get_material(p, 0, STATE_SHININESS);
-         emit_op1(p, OPCODE_MOV, dots, WRITEMASK_W, swizzle1(shininess,X));
-         release_temp(p, shininess);
-      }
-
-      _col0 = make_temp(p, get_scenecolor(p, 0));
-      if (separate)
-	 _col1 = make_temp(p, get_identity_param(p));
-      else
-	 _col1 = _col0;
-   }
-
-   if (twoside) {
-      if (!p->state->material_shininess_is_zero) {
-         /* Note that we negate the back-face specular exponent here.
-          * The negation will be un-done later in the back-face code below.
-          */
-         struct ureg shininess = get_material(p, 1, STATE_SHININESS);
-         emit_op1(p, OPCODE_MOV, dots, WRITEMASK_Z,
-                  negate(swizzle1(shininess,X)));
-         release_temp(p, shininess);
-      }
-
-      _bfc0 = make_temp(p, get_scenecolor(p, 1));
-      if (separate)
-	 _bfc1 = make_temp(p, get_identity_param(p));
-      else
-	 _bfc1 = _bfc0;
-   }
-
-   /* If no lights, still need to emit the scenecolor.
-    */
-   {
-      struct ureg res0 = register_output( p, VERT_RESULT_COL0 );
-      emit_op1(p, OPCODE_MOV, res0, 0, _col0);
-   }
-
-   if (separate) {
-      struct ureg res1 = register_output( p, VERT_RESULT_COL1 );
-      emit_op1(p, OPCODE_MOV, res1, 0, _col1);
-   }
-
-   if (twoside) {
-      struct ureg res0 = register_output( p, VERT_RESULT_BFC0 );
-      emit_op1(p, OPCODE_MOV, res0, 0, _bfc0);
-   }
-
-   if (twoside && separate) {
-      struct ureg res1 = register_output( p, VERT_RESULT_BFC1 );
-      emit_op1(p, OPCODE_MOV, res1, 0, _bfc1);
-   }
-
-   if (nr_lights == 0) {
-      release_temps(p);
-      return;
-   }
-
-   for (i = 0; i < MAX_LIGHTS; i++) {
-      if (p->state->unit[i].light_enabled) {
-	 struct ureg half = undef;
-	 struct ureg att = undef, VPpli = undef;
-
-	 count++;
-
-	 if (p->state->unit[i].light_eyepos3_is_zero) {
-	    /* Can used precomputed constants in this case.
-	     * Attenuation never applies to infinite lights.
-	     */
-	    VPpli = register_param3(p, STATE_INTERNAL,
-				    STATE_LIGHT_POSITION_NORMALIZED, i);
-
-            if (!p->state->material_shininess_is_zero) {
-               if (p->state->light_local_viewer) {
-                  struct ureg eye_hat = get_eye_position_normalized(p);
-                  half = get_temp(p);
-                  emit_op2(p, OPCODE_SUB, half, 0, VPpli, eye_hat);
-                  emit_normalize_vec3(p, half, half);
-               }
-               else {
-                  half = register_param3(p, STATE_INTERNAL,
-                                         STATE_LIGHT_HALF_VECTOR, i);
-               }
-            }
-	 }
-	 else {
-	    struct ureg Ppli = register_param3(p, STATE_INTERNAL,
-					       STATE_LIGHT_POSITION, i);
-	    struct ureg V = get_eye_position(p);
-	    struct ureg dist = get_temp(p);
-
-	    VPpli = get_temp(p);
-
-	    /* Calculate VPpli vector
-	     */
-	    emit_op2(p, OPCODE_SUB, VPpli, 0, Ppli, V);
-
-	    /* Normalize VPpli.  The dist value also used in
-	     * attenuation below.
-	     */
-	    emit_op2(p, OPCODE_DP3, dist, 0, VPpli, VPpli);
-	    emit_op1(p, OPCODE_RSQ, dist, 0, dist);
-	    emit_op2(p, OPCODE_MUL, VPpli, 0, VPpli, dist);
-
-	    /* Calculate attenuation:
-	     */
-	    if (!p->state->unit[i].light_spotcutoff_is_180 ||
-		p->state->unit[i].light_attenuated) {
-	       att = calculate_light_attenuation(p, i, VPpli, dist);
-	    }
-
-	    /* Calculate viewer direction, or use infinite viewer:
-	     */
-            if (!p->state->material_shininess_is_zero) {
-               half = get_temp(p);
-
-               if (p->state->light_local_viewer) {
-                  struct ureg eye_hat = get_eye_position_normalized(p);
-                  emit_op2(p, OPCODE_SUB, half, 0, VPpli, eye_hat);
-               }
-               else {
-                  struct ureg z_dir = swizzle(get_identity_param(p),X,Y,W,Z);
-                  emit_op2(p, OPCODE_ADD, half, 0, VPpli, z_dir);
-               }
-
-               emit_normalize_vec3(p, half, half);
-            }
-
-	    release_temp(p, dist);
-	 }
-
-	 /* Calculate dot products:
-	  */
-         if (p->state->material_shininess_is_zero) {
-            emit_op2(p, OPCODE_DP3, dots, 0, normal, VPpli);
-         }
-         else {
-            emit_op2(p, OPCODE_DP3, dots, WRITEMASK_X, normal, VPpli);
-            emit_op2(p, OPCODE_DP3, dots, WRITEMASK_Y, normal, half);
-         }
-
-	 /* Front face lighting:
-	  */
-	 {
-	    struct ureg ambient = get_lightprod(p, i, 0, STATE_AMBIENT);
-	    struct ureg diffuse = get_lightprod(p, i, 0, STATE_DIFFUSE);
-	    struct ureg specular = get_lightprod(p, i, 0, STATE_SPECULAR);
-	    struct ureg res0, res1;
-	    GLuint mask0, mask1;
-
-	    if (count == nr_lights) {
-	       if (separate) {
-		  mask0 = WRITEMASK_XYZ;
-		  mask1 = WRITEMASK_XYZ;
-		  res0 = register_output( p, VERT_RESULT_COL0 );
-		  res1 = register_output( p, VERT_RESULT_COL1 );
-	       }
-	       else {
-		  mask0 = 0;
-		  mask1 = WRITEMASK_XYZ;
-		  res0 = _col0;
-		  res1 = register_output( p, VERT_RESULT_COL0 );
-	       }
-	    }
-            else {
-	       mask0 = 0;
-	       mask1 = 0;
-	       res0 = _col0;
-	       res1 = _col1;
-	    }
-
-	    if (!is_undef(att)) {
-               /* light is attenuated by distance */
-               emit_op1(p, OPCODE_LIT, lit, 0, dots);
-               emit_op2(p, OPCODE_MUL, lit, 0, lit, att);
-               emit_op3(p, OPCODE_MAD, _col0, 0, swizzle1(lit,X), ambient, _col0);
-            }
-            else if (!p->state->material_shininess_is_zero) {
-               /* there's a non-zero specular term */
-               emit_op1(p, OPCODE_LIT, lit, 0, dots);
-               emit_op2(p, OPCODE_ADD, _col0, 0, ambient, _col0);
-            }
-            else {
-               /* no attenutation, no specular */
-               emit_degenerate_lit(p, lit, dots);
-               emit_op2(p, OPCODE_ADD, _col0, 0, ambient, _col0);
-            }
-
-	    emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _col0);
-	    emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _col1);
-
-	    release_temp(p, ambient);
-	    release_temp(p, diffuse);
-	    release_temp(p, specular);
-	 }
-
-	 /* Back face lighting:
-	  */
-	 if (twoside) {
-	    struct ureg ambient = get_lightprod(p, i, 1, STATE_AMBIENT);
-	    struct ureg diffuse = get_lightprod(p, i, 1, STATE_DIFFUSE);
-	    struct ureg specular = get_lightprod(p, i, 1, STATE_SPECULAR);
-	    struct ureg res0, res1;
-	    GLuint mask0, mask1;
-
-	    if (count == nr_lights) {
-	       if (separate) {
-		  mask0 = WRITEMASK_XYZ;
-		  mask1 = WRITEMASK_XYZ;
-		  res0 = register_output( p, VERT_RESULT_BFC0 );
-		  res1 = register_output( p, VERT_RESULT_BFC1 );
-	       }
-	       else {
-		  mask0 = 0;
-		  mask1 = WRITEMASK_XYZ;
-		  res0 = _bfc0;
-		  res1 = register_output( p, VERT_RESULT_BFC0 );
-	       }
-	    }
-            else {
-	       res0 = _bfc0;
-	       res1 = _bfc1;
-	       mask0 = 0;
-	       mask1 = 0;
-	    }
-
-            /* For the back face we need to negate the X and Y component
-             * dot products.  dots.Z has the negated back-face specular
-             * exponent.  We swizzle that into the W position.  This
-             * negation makes the back-face specular term positive again.
-             */
-            dots = negate(swizzle(dots,X,Y,W,Z));
-
-	    if (!is_undef(att)) {
-               emit_op1(p, OPCODE_LIT, lit, 0, dots);
-	       emit_op2(p, OPCODE_MUL, lit, 0, lit, att);
-               emit_op3(p, OPCODE_MAD, _bfc0, 0, swizzle1(lit,X), ambient, _bfc0);
-            }
-            else if (!p->state->material_shininess_is_zero) {
-               emit_op1(p, OPCODE_LIT, lit, 0, dots);
-               emit_op2(p, OPCODE_ADD, _bfc0, 0, ambient, _bfc0); /**/
-            }
-            else {
-               emit_degenerate_lit(p, lit, dots);
-               emit_op2(p, OPCODE_ADD, _bfc0, 0, ambient, _bfc0);
-            }
-
-	    emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _bfc0);
-	    emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _bfc1);
-            /* restore dots to its original state for subsequent lights
-             * by negating and swizzling again.
-             */
-            dots = negate(swizzle(dots,X,Y,W,Z));
-
-	    release_temp(p, ambient);
-	    release_temp(p, diffuse);
-	    release_temp(p, specular);
-	 }
-
-	 release_temp(p, half);
-	 release_temp(p, VPpli);
-	 release_temp(p, att);
-      }
-   }
-
-   release_temps( p );
-}
-
-
-static void build_fog( struct tnl_program *p )
-{
-   struct ureg fog = register_output(p, VERT_RESULT_FOGC);
-   struct ureg input;
-
-   if (p->state->fog_source_is_depth) {
-      input = get_eye_position_z(p);
-   }
-   else {
-      input = swizzle1(register_input(p, VERT_ATTRIB_FOG), X);
-   }
-
-   /* result.fog = {abs(f),0,0,1}; */
-   emit_op1(p, OPCODE_ABS, fog, WRITEMASK_X, input);
-   emit_op1(p, OPCODE_MOV, fog, WRITEMASK_YZW, get_identity_param(p));
-}
-
-
-static void build_reflect_texgen( struct tnl_program *p,
-				  struct ureg dest,
-				  GLuint writemask )
-{
-   struct ureg normal = get_transformed_normal(p);
-   struct ureg eye_hat = get_eye_position_normalized(p);
-   struct ureg tmp = get_temp(p);
-
-   /* n.u */
-   emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);
-   /* 2n.u */
-   emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);
-   /* (-2n.u)n + u */
-   emit_op3(p, OPCODE_MAD, dest, writemask, negate(tmp), normal, eye_hat);
-
-   release_temp(p, tmp);
-}
-
-
-static void build_sphere_texgen( struct tnl_program *p,
-				 struct ureg dest,
-				 GLuint writemask )
-{
-   struct ureg normal = get_transformed_normal(p);
-   struct ureg eye_hat = get_eye_position_normalized(p);
-   struct ureg tmp = get_temp(p);
-   struct ureg half = register_scalar_const(p, .5);
-   struct ureg r = get_temp(p);
-   struct ureg inv_m = get_temp(p);
-   struct ureg id = get_identity_param(p);
-
-   /* Could share the above calculations, but it would be
-    * a fairly odd state for someone to set (both sphere and
-    * reflection active for different texture coordinate
-    * components.  Of course - if two texture units enable
-    * reflect and/or sphere, things start to tilt in favour
-    * of seperating this out:
-    */
-
-   /* n.u */
-   emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);
-   /* 2n.u */
-   emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);
-   /* (-2n.u)n + u */
-   emit_op3(p, OPCODE_MAD, r, 0, negate(tmp), normal, eye_hat);
-   /* r + 0,0,1 */
-   emit_op2(p, OPCODE_ADD, tmp, 0, r, swizzle(id,X,Y,W,Z));
-   /* rx^2 + ry^2 + (rz+1)^2 */
-   emit_op2(p, OPCODE_DP3, tmp, 0, tmp, tmp);
-   /* 2/m */
-   emit_op1(p, OPCODE_RSQ, tmp, 0, tmp);
-   /* 1/m */
-   emit_op2(p, OPCODE_MUL, inv_m, 0, tmp, half);
-   /* r/m + 1/2 */
-   emit_op3(p, OPCODE_MAD, dest, writemask, r, inv_m, half);
-
-   release_temp(p, tmp);
-   release_temp(p, r);
-   release_temp(p, inv_m);
-}
-
-
-static void build_texture_transform( struct tnl_program *p )
-{
-   GLuint i, j;
-
-   for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
-
-      if (!(p->state->fragprog_inputs_read & FRAG_BIT_TEX(i)))
-	 continue;
-
-      if (p->state->unit[i].coord_replace)
-  	 continue;
-
-      if (p->state->unit[i].texgen_enabled ||
-	  p->state->unit[i].texmat_enabled) {
-
-	 GLuint texmat_enabled = p->state->unit[i].texmat_enabled;
-	 struct ureg out = register_output(p, VERT_RESULT_TEX0 + i);
-	 struct ureg out_texgen = undef;
-
-	 if (p->state->unit[i].texgen_enabled) {
-	    GLuint copy_mask = 0;
-	    GLuint sphere_mask = 0;
-	    GLuint reflect_mask = 0;
-	    GLuint normal_mask = 0;
-	    GLuint modes[4];
-
-	    if (texmat_enabled)
-	       out_texgen = get_temp(p);
-	    else
-	       out_texgen = out;
-
-	    modes[0] = p->state->unit[i].texgen_mode0;
-	    modes[1] = p->state->unit[i].texgen_mode1;
-	    modes[2] = p->state->unit[i].texgen_mode2;
-	    modes[3] = p->state->unit[i].texgen_mode3;
-
-	    for (j = 0; j < 4; j++) {
-	       switch (modes[j]) {
-	       case TXG_OBJ_LINEAR: {
-		  struct ureg obj = register_input(p, VERT_ATTRIB_POS);
-		  struct ureg plane =
-		     register_param3(p, STATE_TEXGEN, i,
-				     STATE_TEXGEN_OBJECT_S + j);
-
-		  emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,
-			   obj, plane );
-		  break;
-	       }
-	       case TXG_EYE_LINEAR: {
-		  struct ureg eye = get_eye_position(p);
-		  struct ureg plane =
-		     register_param3(p, STATE_TEXGEN, i,
-				     STATE_TEXGEN_EYE_S + j);
-
-		  emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,
-			   eye, plane );
-		  break;
-	       }
-	       case TXG_SPHERE_MAP:
-		  sphere_mask |= WRITEMASK_X << j;
-		  break;
-	       case TXG_REFLECTION_MAP:
-		  reflect_mask |= WRITEMASK_X << j;
-		  break;
-	       case TXG_NORMAL_MAP:
-		  normal_mask |= WRITEMASK_X << j;
-		  break;
-	       case TXG_NONE:
-		  copy_mask |= WRITEMASK_X << j;
-	       }
-	    }
-
-	    if (sphere_mask) {
-	       build_sphere_texgen(p, out_texgen, sphere_mask);
-	    }
-
-	    if (reflect_mask) {
-	       build_reflect_texgen(p, out_texgen, reflect_mask);
-	    }
-
-	    if (normal_mask) {
-	       struct ureg normal = get_transformed_normal(p);
-	       emit_op1(p, OPCODE_MOV, out_texgen, normal_mask, normal );
-	    }
-
-	    if (copy_mask) {
-	       struct ureg in = register_input(p, VERT_ATTRIB_TEX0+i);
-	       emit_op1(p, OPCODE_MOV, out_texgen, copy_mask, in );
-	    }
-	 }
-
-	 if (texmat_enabled) {
-	    struct ureg texmat[4];
-	    struct ureg in = (!is_undef(out_texgen) ?
-			      out_texgen :
-			      register_input(p, VERT_ATTRIB_TEX0+i));
-	    if (p->mvp_with_dp4) {
-	       register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3,
-				       0, texmat );
-	       emit_matrix_transform_vec4( p, out, texmat, in );
-	    }
-	    else {
-	       register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3,
-				       STATE_MATRIX_TRANSPOSE, texmat );
-	       emit_transpose_matrix_transform_vec4( p, out, texmat, in );
-	    }
-	 }
-
-	 release_temps(p);
-      }
-      else {
-	 emit_passthrough(p, VERT_ATTRIB_TEX0+i, VERT_RESULT_TEX0+i);
-      }
-   }
-}
-
-
-/**
- * Point size attenuation computation.
- */
-static void build_atten_pointsize( struct tnl_program *p )
-{
-   struct ureg eye = get_eye_position_z(p);
-   struct ureg state_size = register_param2(p, STATE_INTERNAL, STATE_POINT_SIZE_CLAMPED);
-   struct ureg state_attenuation = register_param1(p, STATE_POINT_ATTENUATION);
-   struct ureg out = register_output(p, VERT_RESULT_PSIZ);
-   struct ureg ut = get_temp(p);
-
-   /* dist = |eyez| */
-   emit_op1(p, OPCODE_ABS, ut, WRITEMASK_Y, swizzle1(eye, Z));
-   /* p1 + dist * (p2 + dist * p3); */
-   emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),
-		swizzle1(state_attenuation, Z), swizzle1(state_attenuation, Y));
-   emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),
-		ut, swizzle1(state_attenuation, X));
-
-   /* 1 / sqrt(factor) */
-   emit_op1(p, OPCODE_RSQ, ut, WRITEMASK_X, ut );
-
-#if 0
-   /* out = pointSize / sqrt(factor) */
-   emit_op2(p, OPCODE_MUL, out, WRITEMASK_X, ut, state_size);
-#else
-   /* this is a good place to clamp the point size since there's likely
-    * no hardware registers to clamp point size at rasterization time.
-    */
-   emit_op2(p, OPCODE_MUL, ut, WRITEMASK_X, ut, state_size);
-   emit_op2(p, OPCODE_MAX, ut, WRITEMASK_X, ut, swizzle1(state_size, Y));
-   emit_op2(p, OPCODE_MIN, out, WRITEMASK_X, ut, swizzle1(state_size, Z));
-#endif
-
-   release_temp(p, ut);
-}
-
-
-/**
- * Pass-though per-vertex point size, from user's point size array.
- */
-static void build_array_pointsize( struct tnl_program *p )
-{
-   struct ureg in = register_input(p, VERT_ATTRIB_POINT_SIZE);
-   struct ureg out = register_output(p, VERT_RESULT_PSIZ);
-   emit_op1(p, OPCODE_MOV, out, WRITEMASK_X, in);
-}
-
-
-static void build_tnl_program( struct tnl_program *p )
-{
-   /* Emit the program, starting with modelviewproject:
-    */
-   build_hpos(p);
-
-   /* Lighting calculations:
-    */
-   if (p->state->fragprog_inputs_read & (FRAG_BIT_COL0|FRAG_BIT_COL1)) {
-      if (p->state->light_global_enabled)
-	 build_lighting(p);
-      else {
-	 if (p->state->fragprog_inputs_read & FRAG_BIT_COL0)
-	    emit_passthrough(p, VERT_ATTRIB_COLOR0, VERT_RESULT_COL0);
-
-	 if (p->state->fragprog_inputs_read & FRAG_BIT_COL1)
-	    emit_passthrough(p, VERT_ATTRIB_COLOR1, VERT_RESULT_COL1);
-      }
-   }
-
-   if (p->state->fragprog_inputs_read & FRAG_BIT_FOGC)
-      build_fog(p);
-
-   if (p->state->fragprog_inputs_read & FRAG_BITS_TEX_ANY)
-      build_texture_transform(p);
-
-   if (p->state->point_attenuated)
-      build_atten_pointsize(p);
-   else if (p->state->point_array)
-      build_array_pointsize(p);
-
-   /* Finish up:
-    */
-   emit_op1(p, OPCODE_END, undef, 0, undef);
-
-   /* Disassemble:
-    */
-   if (DISASSEM) {
-      printf ("\n");
-   }
-}
-
-
-static void
-create_new_program( const struct state_key *key,
-                    struct gl_vertex_program *program,
-                    GLboolean mvp_with_dp4,
-                    GLuint max_temps)
-{
-   struct tnl_program p;
-
-   memset(&p, 0, sizeof(p));
-   p.state = key;
-   p.program = program;
-   p.eye_position = undef;
-   p.eye_position_z = undef;
-   p.eye_position_normalized = undef;
-   p.transformed_normal = undef;
-   p.identity = undef;
-   p.temp_in_use = 0;
-   p.mvp_with_dp4 = mvp_with_dp4;
-
-   if (max_temps >= sizeof(int) * 8)
-      p.temp_reserved = 0;
-   else
-      p.temp_reserved = ~((1<<max_temps)-1);
-
-   /* Start by allocating 32 instructions.
-    * If we need more, we'll grow the instruction array as needed.
-    */
-   p.max_inst = 32;
-   p.program->Base.Instructions = _mesa_alloc_instructions(p.max_inst);
-   p.program->Base.String = NULL;
-   p.program->Base.NumInstructions =
-   p.program->Base.NumTemporaries =
-   p.program->Base.NumParameters =
-   p.program->Base.NumAttributes = p.program->Base.NumAddressRegs = 0;
-   p.program->Base.Parameters = _mesa_new_parameter_list();
-   p.program->Base.InputsRead = 0;
-   p.program->Base.OutputsWritten = 0;
-
-   build_tnl_program( &p );
-}
-
-
-/**
- * Return a vertex program which implements the current fixed-function
- * transform/lighting/texgen operations.
- * XXX move this into core mesa (main/)
- */
-struct gl_vertex_program *
-_mesa_get_fixed_func_vertex_program(GLcontext *ctx)
-{
-   struct gl_vertex_program *prog;
-   struct state_key key;
-
-   /* Grab all the relevent state and put it in a single structure:
-    */
-   make_state_key(ctx, &key);
-
-   /* Look for an already-prepared program for this state:
-    */
-   prog = (struct gl_vertex_program *)
-      _mesa_search_program_cache(ctx->VertexProgram.Cache, &key, sizeof(key));
-
-   if (!prog) {
-      /* OK, we'll have to build a new one */
-      if (0)
-         printf("Build new TNL program\n");
-
-      prog = (struct gl_vertex_program *)
-         ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
-      if (!prog)
-         return NULL;
-
-      create_new_program( &key, prog,
-                          ctx->mvp_with_dp4,
-                          ctx->Const.VertexProgram.MaxTemps );
-
-#if 0
-      if (ctx->Driver.ProgramStringNotify)
-         ctx->Driver.ProgramStringNotify( ctx, GL_VERTEX_PROGRAM_ARB,
-                                          &prog->Base );
-#endif
-      _mesa_program_cache_insert(ctx, ctx->VertexProgram.Cache,
-                                 &key, sizeof(key), &prog->Base);
-   }
-
-   return prog;
-}
+/**************************************************************************

+ *

+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

+ * 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 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 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.

+ *

+ **************************************************************************/

+

+/**

+ * \file ffvertex_prog.c

+ *

+ * Create a vertex program to execute the current fixed function T&L pipeline.

+ * \author Keith Whitwell

+ */

+

+

+#include "main/glheader.h"

+#include "main/mtypes.h"

+#include "main/macros.h"

+#include "main/enums.h"

+#include "main/ffvertex_prog.h"

+#include "program/program.h"

+#include "program/prog_cache.h"

+#include "program/prog_instruction.h"

+#include "program/prog_parameter.h"

+#include "program/prog_print.h"

+#include "program/prog_statevars.h"

+

+

+/** Max of number of lights and texture coord units */

+#define NUM_UNITS MAX2(MAX_TEXTURE_COORD_UNITS, MAX_LIGHTS)

+

+struct state_key {

+   unsigned light_color_material_mask:12;

+   unsigned light_global_enabled:1;

+   unsigned light_local_viewer:1;

+   unsigned light_twoside:1;

+   unsigned material_shininess_is_zero:1;

+   unsigned need_eye_coords:1;

+   unsigned normalize:1;

+   unsigned rescale_normals:1;

+

+   unsigned fog_source_is_depth:1;

+   unsigned separate_specular:1;

+   unsigned point_attenuated:1;

+   unsigned point_array:1;

+   unsigned texture_enabled_global:1;

+   unsigned fragprog_inputs_read:12;

+

+   unsigned varying_vp_inputs;

+

+   struct {

+      unsigned light_enabled:1;

+      unsigned light_eyepos3_is_zero:1;

+      unsigned light_spotcutoff_is_180:1;

+      unsigned light_attenuated:1;

+      unsigned texunit_really_enabled:1;

+      unsigned texmat_enabled:1;

+      unsigned coord_replace:1;

+      unsigned texgen_enabled:4;

+      unsigned texgen_mode0:4;

+      unsigned texgen_mode1:4;

+      unsigned texgen_mode2:4;

+      unsigned texgen_mode3:4;

+   } unit[NUM_UNITS];

+};

+

+

+#define TXG_NONE           0

+#define TXG_OBJ_LINEAR     1

+#define TXG_EYE_LINEAR     2

+#define TXG_SPHERE_MAP     3

+#define TXG_REFLECTION_MAP 4

+#define TXG_NORMAL_MAP     5

+

+static GLuint translate_texgen( GLboolean enabled, GLenum mode )

+{

+   if (!enabled)

+      return TXG_NONE;

+

+   switch (mode) {

+   case GL_OBJECT_LINEAR: return TXG_OBJ_LINEAR;

+   case GL_EYE_LINEAR: return TXG_EYE_LINEAR;

+   case GL_SPHERE_MAP: return TXG_SPHERE_MAP;

+   case GL_REFLECTION_MAP_NV: return TXG_REFLECTION_MAP;

+   case GL_NORMAL_MAP_NV: return TXG_NORMAL_MAP;

+   default: return TXG_NONE;

+   }

+}

+

+

+

+static GLboolean check_active_shininess( struct gl_context *ctx,

+                                         const struct state_key *key,

+                                         GLuint side )

+{

+   GLuint bit = 1 << (MAT_ATTRIB_FRONT_SHININESS + side);

+

+   if ((key->varying_vp_inputs & VERT_BIT_COLOR0) &&

+       (key->light_color_material_mask & bit))

+      return GL_TRUE;

+

+   if (key->varying_vp_inputs & (bit << 16))

+      return GL_TRUE;

+

+   if (ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SHININESS + side][0] != 0.0F)

+      return GL_TRUE;

+

+   return GL_FALSE;

+}

+

+

+static void make_state_key( struct gl_context *ctx, struct state_key *key )

+{

+   const struct gl_fragment_program *fp;

+   GLuint i;

+

+   memset(key, 0, sizeof(struct state_key));

+   fp = ctx->FragmentProgram._Current;

+

+   /* This now relies on texenvprogram.c being active:

+    */

+   assert(fp);

+

+   key->need_eye_coords = ctx->_NeedEyeCoords;

+

+   key->fragprog_inputs_read = fp->Base.InputsRead;

+   key->varying_vp_inputs = ctx->varying_vp_inputs;

+

+   if (ctx->RenderMode == GL_FEEDBACK) {

+      /* make sure the vertprog emits color and tex0 */

+      key->fragprog_inputs_read |= (FRAG_BIT_COL0 | FRAG_BIT_TEX0);

+   }

+

+   key->separate_specular = (ctx->Light.Model.ColorControl ==

+			     GL_SEPARATE_SPECULAR_COLOR);

+

+   if (ctx->Light.Enabled) {

+      key->light_global_enabled = 1;

+

+      if (ctx->Light.Model.LocalViewer)

+	 key->light_local_viewer = 1;

+

+      if (ctx->Light.Model.TwoSide)

+	 key->light_twoside = 1;

+

+      if (ctx->Light.ColorMaterialEnabled) {

+	 key->light_color_material_mask = ctx->Light.ColorMaterialBitmask;

+      }

+

+      for (i = 0; i < MAX_LIGHTS; i++) {

+	 struct gl_light *light = &ctx->Light.Light[i];

+

+	 if (light->Enabled) {

+	    key->unit[i].light_enabled = 1;

+

+	    if (light->EyePosition[3] == 0.0)

+	       key->unit[i].light_eyepos3_is_zero = 1;

+

+	    if (light->SpotCutoff == 180.0)

+	       key->unit[i].light_spotcutoff_is_180 = 1;

+

+	    if (light->ConstantAttenuation != 1.0 ||

+		light->LinearAttenuation != 0.0 ||

+		light->QuadraticAttenuation != 0.0)

+	       key->unit[i].light_attenuated = 1;

+	 }

+      }

+

+      if (check_active_shininess(ctx, key, 0)) {

+         key->material_shininess_is_zero = 0;

+      }

+      else if (key->light_twoside &&

+               check_active_shininess(ctx, key, 1)) {

+         key->material_shininess_is_zero = 0;

+      }

+      else {

+         key->material_shininess_is_zero = 1;

+      }

+   }

+

+   if (ctx->Transform.Normalize)

+      key->normalize = 1;

+

+   if (ctx->Transform.RescaleNormals)

+      key->rescale_normals = 1;

+

+   if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT)

+      key->fog_source_is_depth = 1;

+

+   if (ctx->Point._Attenuated)

+      key->point_attenuated = 1;

+

+#if FEATURE_point_size_array

+   if (ctx->Array.ArrayObj->PointSize.Enabled)

+      key->point_array = 1;

+#endif

+

+   if (ctx->Texture._TexGenEnabled ||

+       ctx->Texture._TexMatEnabled ||

+       ctx->Texture._EnabledUnits)

+      key->texture_enabled_global = 1;

+

+   for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {

+      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];

+

+      if (texUnit->_ReallyEnabled)

+	 key->unit[i].texunit_really_enabled = 1;

+

+      if (ctx->Point.PointSprite)

+	 if (ctx->Point.CoordReplace[i])

+	    key->unit[i].coord_replace = 1;

+

+      if (ctx->Texture._TexMatEnabled & ENABLE_TEXMAT(i))

+	 key->unit[i].texmat_enabled = 1;

+

+      if (texUnit->TexGenEnabled) {

+	 key->unit[i].texgen_enabled = 1;

+

+	 key->unit[i].texgen_mode0 =

+	    translate_texgen( texUnit->TexGenEnabled & (1<<0),

+			      texUnit->GenS.Mode );

+	 key->unit[i].texgen_mode1 =

+	    translate_texgen( texUnit->TexGenEnabled & (1<<1),

+			      texUnit->GenT.Mode );

+	 key->unit[i].texgen_mode2 =

+	    translate_texgen( texUnit->TexGenEnabled & (1<<2),

+			      texUnit->GenR.Mode );

+	 key->unit[i].texgen_mode3 =

+	    translate_texgen( texUnit->TexGenEnabled & (1<<3),

+			      texUnit->GenQ.Mode );

+      }

+   }

+}

+

+

+

+/* Very useful debugging tool - produces annotated listing of

+ * generated program with line/function references for each

+ * instruction back into this file:

+ */

+#define DISASSEM 0

+

+

+/* Use uregs to represent registers internally, translate to Mesa's

+ * expected formats on emit.

+ *

+ * NOTE: These are passed by value extensively in this file rather

+ * than as usual by pointer reference.  If this disturbs you, try

+ * remembering they are just 32bits in size.

+ *

+ * GCC is smart enough to deal with these dword-sized structures in

+ * much the same way as if I had defined them as dwords and was using

+ * macros to access and set the fields.  This is much nicer and easier

+ * to evolve.

+ */

+struct ureg {

+   GLuint file:4;

+   GLint idx:9;      /* relative addressing may be negative */

+                     /* sizeof(idx) should == sizeof(prog_src_reg::Index) */

+   GLuint negate:1;

+   GLuint swz:12;

+   GLuint pad:6;

+};

+

+

+struct tnl_program {

+   const struct state_key *state;

+   struct gl_vertex_program *program;

+   GLint max_inst;  /** number of instructions allocated for program */

+   GLboolean mvp_with_dp4;

+

+   GLuint temp_in_use;

+   GLuint temp_reserved;

+

+   struct ureg eye_position;

+   struct ureg eye_position_z;

+   struct ureg eye_position_normalized;

+   struct ureg transformed_normal;

+   struct ureg identity;

+

+   GLuint materials;

+   GLuint color_materials;

+};

+

+

+static const struct ureg undef = {

+   PROGRAM_UNDEFINED,

+   0,

+   0,

+   0,

+   0

+};

+

+/* Local shorthand:

+ */

+#define X    SWIZZLE_X

+#define Y    SWIZZLE_Y

+#define Z    SWIZZLE_Z

+#define W    SWIZZLE_W

+

+

+/* Construct a ureg:

+ */

+static struct ureg make_ureg(GLuint file, GLint idx)

+{

+   struct ureg reg;

+   reg.file = file;

+   reg.idx = idx;

+   reg.negate = 0;

+   reg.swz = SWIZZLE_NOOP;

+   reg.pad = 0;

+   return reg;

+}

+

+

+

+static struct ureg negate( struct ureg reg )

+{

+   reg.negate ^= 1;

+   return reg;

+}

+

+

+static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )

+{

+   reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),

+			   GET_SWZ(reg.swz, y),

+			   GET_SWZ(reg.swz, z),

+			   GET_SWZ(reg.swz, w));

+   return reg;

+}

+

+

+static struct ureg swizzle1( struct ureg reg, int x )

+{

+   return swizzle(reg, x, x, x, x);

+}

+

+

+static struct ureg get_temp( struct tnl_program *p )

+{

+   int bit = _mesa_ffs( ~p->temp_in_use );

+   if (!bit) {

+      _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);

+      exit(1);

+   }

+

+   if ((GLuint) bit > p->program->Base.NumTemporaries)

+      p->program->Base.NumTemporaries = bit;

+

+   p->temp_in_use |= 1<<(bit-1);

+   return make_ureg(PROGRAM_TEMPORARY, bit-1);

+}

+

+

+static struct ureg reserve_temp( struct tnl_program *p )

+{

+   struct ureg temp = get_temp( p );

+   p->temp_reserved |= 1<<temp.idx;

+   return temp;

+}

+

+

+static void release_temp( struct tnl_program *p, struct ureg reg )

+{

+   if (reg.file == PROGRAM_TEMPORARY) {

+      p->temp_in_use &= ~(1<<reg.idx);

+      p->temp_in_use |= p->temp_reserved; /* can't release reserved temps */

+   }

+}

+

+static void release_temps( struct tnl_program *p )

+{

+   p->temp_in_use = p->temp_reserved;

+}

+

+

+static struct ureg register_param5(struct tnl_program *p,

+				   GLint s0,

+				   GLint s1,

+				   GLint s2,

+				   GLint s3,

+                                   GLint s4)

+{

+   gl_state_index tokens[STATE_LENGTH];

+   GLint idx;

+   tokens[0] = s0;

+   tokens[1] = s1;

+   tokens[2] = s2;

+   tokens[3] = s3;

+   tokens[4] = s4;

+   idx = _mesa_add_state_reference( p->program->Base.Parameters, tokens );

+   return make_ureg(PROGRAM_STATE_VAR, idx);

+}

+

+

+#define register_param1(p,s0)          register_param5(p,s0,0,0,0,0)

+#define register_param2(p,s0,s1)       register_param5(p,s0,s1,0,0,0)

+#define register_param3(p,s0,s1,s2)    register_param5(p,s0,s1,s2,0,0)

+#define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)

+

+

+

+/**

+ * \param input  one of VERT_ATTRIB_x tokens.

+ */

+static struct ureg register_input( struct tnl_program *p, GLuint input )

+{

+   assert(input < 32);

+

+   if (p->state->varying_vp_inputs & (1<<input)) {

+      p->program->Base.InputsRead |= (1<<input);

+      return make_ureg(PROGRAM_INPUT, input);

+   }

+   else {

+      return register_param3( p, STATE_INTERNAL, STATE_CURRENT_ATTRIB, input );

+   }

+}

+

+

+/**

+ * \param input  one of VERT_RESULT_x tokens.

+ */

+static struct ureg register_output( struct tnl_program *p, GLuint output )

+{

+   p->program->Base.OutputsWritten |= BITFIELD64_BIT(output);

+   return make_ureg(PROGRAM_OUTPUT, output);

+}

+

+

+static struct ureg register_const4f( struct tnl_program *p,

+			      GLfloat s0,

+			      GLfloat s1,

+			      GLfloat s2,

+			      GLfloat s3)

+{

+   GLfloat values[4];

+   GLint idx;

+   GLuint swizzle;

+   values[0] = s0;

+   values[1] = s1;

+   values[2] = s2;

+   values[3] = s3;

+   idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,

+                                     &swizzle );

+   ASSERT(swizzle == SWIZZLE_NOOP);

+   return make_ureg(PROGRAM_CONSTANT, idx);

+}

+

+#define register_const1f(p, s0)         register_const4f(p, s0, 0, 0, 1)

+#define register_scalar_const(p, s0)    register_const4f(p, s0, s0, s0, s0)

+#define register_const2f(p, s0, s1)     register_const4f(p, s0, s1, 0, 1)

+#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)

+

+static GLboolean is_undef( struct ureg reg )

+{

+   return reg.file == PROGRAM_UNDEFINED;

+}

+

+

+static struct ureg get_identity_param( struct tnl_program *p )

+{

+   if (is_undef(p->identity))

+      p->identity = register_const4f(p, 0,0,0,1);

+

+   return p->identity;

+}

+

+static void register_matrix_param5( struct tnl_program *p,

+				    GLint s0, /* modelview, projection, etc */

+				    GLint s1, /* texture matrix number */

+				    GLint s2, /* first row */

+				    GLint s3, /* last row */

+				    GLint s4, /* inverse, transpose, etc */

+				    struct ureg *matrix )

+{

+   GLint i;

+

+   /* This is a bit sad as the support is there to pull the whole

+    * matrix out in one go:

+    */

+   for (i = 0; i <= s3 - s2; i++)

+      matrix[i] = register_param5( p, s0, s1, i, i, s4 );

+}

+

+

+static void emit_arg( struct prog_src_register *src,

+		      struct ureg reg )

+{

+   src->File = reg.file;

+   src->Index = reg.idx;

+   src->Swizzle = reg.swz;

+   src->Negate = reg.negate ? NEGATE_XYZW : NEGATE_NONE;

+   src->Abs = 0;

+   src->RelAddr = 0;

+   /* Check that bitfield sizes aren't exceeded */

+   ASSERT(src->Index == reg.idx);

+}

+

+

+static void emit_dst( struct prog_dst_register *dst,

+		      struct ureg reg, GLuint mask )

+{

+   dst->File = reg.file;

+   dst->Index = reg.idx;

+   /* allow zero as a shorthand for xyzw */

+   dst->WriteMask = mask ? mask : WRITEMASK_XYZW;

+   dst->CondMask = COND_TR;  /* always pass cond test */

+   dst->CondSwizzle = SWIZZLE_NOOP;

+   dst->CondSrc = 0;

+   /* Check that bitfield sizes aren't exceeded */

+   ASSERT(dst->Index == reg.idx);

+}

+

+

+static void debug_insn( struct prog_instruction *inst, const char *fn,

+			GLuint line )

+{

+   if (DISASSEM) {

+      static const char *last_fn;

+

+      if (fn != last_fn) {

+	 last_fn = fn;

+	 printf("%s:\n", fn);

+      }

+

+      printf("%d:\t", line);

+      _mesa_print_instruction(inst);

+   }

+}

+

+

+static void emit_op3fn(struct tnl_program *p,

+                       enum prog_opcode op,

+		       struct ureg dest,

+		       GLuint mask,

+		       struct ureg src0,

+		       struct ureg src1,

+		       struct ureg src2,

+		       const char *fn,

+		       GLuint line)

+{

+   GLuint nr;

+   struct prog_instruction *inst;

+

+   assert((GLint) p->program->Base.NumInstructions <= p->max_inst);

+

+   if (p->program->Base.NumInstructions == p->max_inst) {

+      /* need to extend the program's instruction array */

+      struct prog_instruction *newInst;

+

+      /* double the size */

+      p->max_inst *= 2;

+

+      newInst = _mesa_alloc_instructions(p->max_inst);

+      if (!newInst) {

+         _mesa_error(NULL, GL_OUT_OF_MEMORY, "vertex program build");

+         return;

+      }

+

+      _mesa_copy_instructions(newInst,

+                              p->program->Base.Instructions,

+                              p->program->Base.NumInstructions);

+

+      _mesa_free_instructions(p->program->Base.Instructions,

+                              p->program->Base.NumInstructions);

+

+      p->program->Base.Instructions = newInst;

+   }

+

+   nr = p->program->Base.NumInstructions++;

+

+   inst = &p->program->Base.Instructions[nr];

+   inst->Opcode = (enum prog_opcode) op;

+   inst->Data = 0;

+

+   emit_arg( &inst->SrcReg[0], src0 );

+   emit_arg( &inst->SrcReg[1], src1 );

+   emit_arg( &inst->SrcReg[2], src2 );

+

+   emit_dst( &inst->DstReg, dest, mask );

+

+   debug_insn(inst, fn, line);

+}

+

+

+#define emit_op3(p, op, dst, mask, src0, src1, src2) \

+   emit_op3fn(p, op, dst, mask, src0, src1, src2, __FUNCTION__, __LINE__)

+

+#define emit_op2(p, op, dst, mask, src0, src1) \

+    emit_op3fn(p, op, dst, mask, src0, src1, undef, __FUNCTION__, __LINE__)

+

+#define emit_op1(p, op, dst, mask, src0) \

+    emit_op3fn(p, op, dst, mask, src0, undef, undef, __FUNCTION__, __LINE__)

+

+

+static struct ureg make_temp( struct tnl_program *p, struct ureg reg )

+{

+   if (reg.file == PROGRAM_TEMPORARY &&

+       !(p->temp_reserved & (1<<reg.idx)))

+      return reg;

+   else {

+      struct ureg temp = get_temp(p);

+      emit_op1(p, OPCODE_MOV, temp, 0, reg);

+      return temp;

+   }

+}

+

+

+/* Currently no tracking performed of input/output/register size or

+ * active elements.  Could be used to reduce these operations, as

+ * could the matrix type.

+ */

+static void emit_matrix_transform_vec4( struct tnl_program *p,

+					struct ureg dest,

+					const struct ureg *mat,

+					struct ureg src)

+{

+   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_X, src, mat[0]);

+   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Y, src, mat[1]);

+   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Z, src, mat[2]);

+   emit_op2(p, OPCODE_DP4, dest, WRITEMASK_W, src, mat[3]);

+}

+

+

+/* This version is much easier to implement if writemasks are not

+ * supported natively on the target or (like SSE), the target doesn't

+ * have a clean/obvious dotproduct implementation.

+ */

+static void emit_transpose_matrix_transform_vec4( struct tnl_program *p,

+						  struct ureg dest,

+						  const struct ureg *mat,

+						  struct ureg src)

+{

+   struct ureg tmp;

+

+   if (dest.file != PROGRAM_TEMPORARY)

+      tmp = get_temp(p);

+   else

+      tmp = dest;

+

+   emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]);

+   emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp);

+   emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp);

+   emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp);

+

+   if (dest.file != PROGRAM_TEMPORARY)

+      release_temp(p, tmp);

+}

+

+

+static void emit_matrix_transform_vec3( struct tnl_program *p,

+					struct ureg dest,

+					const struct ureg *mat,

+					struct ureg src)

+{

+   emit_op2(p, OPCODE_DP3, dest, WRITEMASK_X, src, mat[0]);

+   emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Y, src, mat[1]);

+   emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Z, src, mat[2]);

+}

+

+

+static void emit_normalize_vec3( struct tnl_program *p,

+				 struct ureg dest,

+				 struct ureg src )

+{

+#if 0

+   /* XXX use this when drivers are ready for NRM3 */

+   emit_op1(p, OPCODE_NRM3, dest, WRITEMASK_XYZ, src);

+#else

+   struct ureg tmp = get_temp(p);

+   emit_op2(p, OPCODE_DP3, tmp, WRITEMASK_X, src, src);

+   emit_op1(p, OPCODE_RSQ, tmp, WRITEMASK_X, tmp);

+   emit_op2(p, OPCODE_MUL, dest, 0, src, swizzle1(tmp, X));

+   release_temp(p, tmp);

+#endif

+}

+

+

+static void emit_passthrough( struct tnl_program *p,

+			      GLuint input,

+			      GLuint output )

+{

+   struct ureg out = register_output(p, output);

+   emit_op1(p, OPCODE_MOV, out, 0, register_input(p, input));

+}

+

+

+static struct ureg get_eye_position( struct tnl_program *p )

+{

+   if (is_undef(p->eye_position)) {

+      struct ureg pos = register_input( p, VERT_ATTRIB_POS );

+      struct ureg modelview[4];

+

+      p->eye_position = reserve_temp(p);

+

+      if (p->mvp_with_dp4) {

+	 register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,

+                                 0, modelview );

+

+	 emit_matrix_transform_vec4(p, p->eye_position, modelview, pos);

+      }

+      else {

+	 register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,

+				 STATE_MATRIX_TRANSPOSE, modelview );

+

+	 emit_transpose_matrix_transform_vec4(p, p->eye_position, modelview, pos);

+      }

+   }

+

+   return p->eye_position;

+}

+

+

+static struct ureg get_eye_position_z( struct tnl_program *p )

+{

+   if (!is_undef(p->eye_position))

+      return swizzle1(p->eye_position, Z);

+

+   if (is_undef(p->eye_position_z)) {

+      struct ureg pos = register_input( p, VERT_ATTRIB_POS );

+      struct ureg modelview[4];

+

+      p->eye_position_z = reserve_temp(p);

+

+      register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,

+                              0, modelview );

+

+      emit_op2(p, OPCODE_DP4, p->eye_position_z, 0, pos, modelview[2]);

+   }

+

+   return p->eye_position_z;

+}

+

+

+static struct ureg get_eye_position_normalized( struct tnl_program *p )

+{

+   if (is_undef(p->eye_position_normalized)) {

+      struct ureg eye = get_eye_position(p);

+      p->eye_position_normalized = reserve_temp(p);

+      emit_normalize_vec3(p, p->eye_position_normalized, eye);

+   }

+

+   return p->eye_position_normalized;

+}

+

+

+static struct ureg get_transformed_normal( struct tnl_program *p )

+{

+   if (is_undef(p->transformed_normal) &&

+       !p->state->need_eye_coords &&

+       !p->state->normalize &&

+       !(p->state->need_eye_coords == p->state->rescale_normals))

+   {

+      p->transformed_normal = register_input(p, VERT_ATTRIB_NORMAL );

+   }

+   else if (is_undef(p->transformed_normal))

+   {

+      struct ureg normal = register_input(p, VERT_ATTRIB_NORMAL );

+      struct ureg mvinv[3];

+      struct ureg transformed_normal = reserve_temp(p);

+

+      if (p->state->need_eye_coords) {

+         register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 2,

+                                 STATE_MATRIX_INVTRANS, mvinv );

+

+         /* Transform to eye space:

+          */

+         emit_matrix_transform_vec3( p, transformed_normal, mvinv, normal );

+         normal = transformed_normal;

+      }

+

+      /* Normalize/Rescale:

+       */

+      if (p->state->normalize) {

+	 emit_normalize_vec3( p, transformed_normal, normal );

+         normal = transformed_normal;

+      }

+      else if (p->state->need_eye_coords == p->state->rescale_normals) {

+         /* This is already adjusted for eye/non-eye rendering:

+          */

+	 struct ureg rescale = register_param2(p, STATE_INTERNAL,

+                                               STATE_NORMAL_SCALE);

+

+	 emit_op2( p, OPCODE_MUL, transformed_normal, 0, normal, rescale );

+         normal = transformed_normal;

+      }

+

+      assert(normal.file == PROGRAM_TEMPORARY);

+      p->transformed_normal = normal;

+   }

+

+   return p->transformed_normal;

+}

+

+

+static void build_hpos( struct tnl_program *p )

+{

+   struct ureg pos = register_input( p, VERT_ATTRIB_POS );

+   struct ureg hpos = register_output( p, VERT_RESULT_HPOS );

+   struct ureg mvp[4];

+

+   if (p->mvp_with_dp4) {

+      register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3,

+			      0, mvp );

+      emit_matrix_transform_vec4( p, hpos, mvp, pos );

+   }

+   else {

+      register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3,

+			      STATE_MATRIX_TRANSPOSE, mvp );

+      emit_transpose_matrix_transform_vec4( p, hpos, mvp, pos );

+   }

+}

+

+

+static GLuint material_attrib( GLuint side, GLuint property )

+{

+   return (property - STATE_AMBIENT) * 2 + side;

+}

+

+

+/**

+ * Get a bitmask of which material values vary on a per-vertex basis.

+ */

+static void set_material_flags( struct tnl_program *p )

+{

+   p->color_materials = 0;

+   p->materials = 0;

+

+   if (p->state->varying_vp_inputs & VERT_BIT_COLOR0) {

+      p->materials =

+	 p->color_materials = p->state->light_color_material_mask;

+   }

+

+   p->materials |= (p->state->varying_vp_inputs >> 16);

+}

+

+

+static struct ureg get_material( struct tnl_program *p, GLuint side,

+				 GLuint property )

+{

+   GLuint attrib = material_attrib(side, property);

+

+   if (p->color_materials & (1<<attrib))

+      return register_input(p, VERT_ATTRIB_COLOR0);

+   else if (p->materials & (1<<attrib)) {

+      /* Put material values in the GENERIC slots -- they are not used

+       * for anything in fixed function mode.

+       */

+      return register_input( p, attrib + VERT_ATTRIB_GENERIC0 );

+   }

+   else

+      return register_param3( p, STATE_MATERIAL, side, property );

+}

+

+#define SCENE_COLOR_BITS(side) (( MAT_BIT_FRONT_EMISSION | \

+				   MAT_BIT_FRONT_AMBIENT | \

+				   MAT_BIT_FRONT_DIFFUSE) << (side))

+

+

+/**

+ * Either return a precalculated constant value or emit code to

+ * calculate these values dynamically in the case where material calls

+ * are present between begin/end pairs.

+ *

+ * Probably want to shift this to the program compilation phase - if

+ * we always emitted the calculation here, a smart compiler could

+ * detect that it was constant (given a certain set of inputs), and

+ * lift it out of the main loop.  That way the programs created here

+ * would be independent of the vertex_buffer details.

+ */

+static struct ureg get_scenecolor( struct tnl_program *p, GLuint side )

+{

+   if (p->materials & SCENE_COLOR_BITS(side)) {

+      struct ureg lm_ambient = register_param1(p, STATE_LIGHTMODEL_AMBIENT);

+      struct ureg material_emission = get_material(p, side, STATE_EMISSION);

+      struct ureg material_ambient = get_material(p, side, STATE_AMBIENT);

+      struct ureg material_diffuse = get_material(p, side, STATE_DIFFUSE);

+      struct ureg tmp = make_temp(p, material_diffuse);

+      emit_op3(p, OPCODE_MAD, tmp, WRITEMASK_XYZ, lm_ambient,

+	       material_ambient, material_emission);

+      return tmp;

+   }

+   else

+      return register_param2( p, STATE_LIGHTMODEL_SCENECOLOR, side );

+}

+

+

+static struct ureg get_lightprod( struct tnl_program *p, GLuint light,

+				  GLuint side, GLuint property )

+{

+   GLuint attrib = material_attrib(side, property);

+   if (p->materials & (1<<attrib)) {

+      struct ureg light_value =

+	 register_param3(p, STATE_LIGHT, light, property);

+      struct ureg material_value = get_material(p, side, property);

+      struct ureg tmp = get_temp(p);

+      emit_op2(p, OPCODE_MUL, tmp, 0, light_value, material_value);

+      return tmp;

+   }

+   else

+      return register_param4(p, STATE_LIGHTPROD, light, side, property);

+}

+

+

+static struct ureg calculate_light_attenuation( struct tnl_program *p,

+						GLuint i,

+						struct ureg VPpli,

+						struct ureg dist )

+{

+   struct ureg attenuation = register_param3(p, STATE_LIGHT, i,

+					     STATE_ATTENUATION);

+   struct ureg att = get_temp(p);

+

+   /* Calculate spot attenuation:

+    */

+   if (!p->state->unit[i].light_spotcutoff_is_180) {

+      struct ureg spot_dir_norm = register_param3(p, STATE_INTERNAL,

+						  STATE_LIGHT_SPOT_DIR_NORMALIZED, i);

+      struct ureg spot = get_temp(p);

+      struct ureg slt = get_temp(p);

+

+      emit_op2(p, OPCODE_DP3, spot, 0, negate(VPpli), spot_dir_norm);

+      emit_op2(p, OPCODE_SLT, slt, 0, swizzle1(spot_dir_norm,W), spot);

+      emit_op2(p, OPCODE_POW, spot, 0, spot, swizzle1(attenuation, W));

+      emit_op2(p, OPCODE_MUL, att, 0, slt, spot);

+

+      release_temp(p, spot);

+      release_temp(p, slt);

+   }

+

+   /* Calculate distance attenuation:

+    */

+   if (p->state->unit[i].light_attenuated) {

+      /* 1/d,d,d,1/d */

+      emit_op1(p, OPCODE_RCP, dist, WRITEMASK_YZ, dist);

+      /* 1,d,d*d,1/d */

+      emit_op2(p, OPCODE_MUL, dist, WRITEMASK_XZ, dist, swizzle1(dist,Y));

+      /* 1/dist-atten */

+      emit_op2(p, OPCODE_DP3, dist, 0, attenuation, dist);

+

+      if (!p->state->unit[i].light_spotcutoff_is_180) {

+	 /* dist-atten */

+	 emit_op1(p, OPCODE_RCP, dist, 0, dist);

+	 /* spot-atten * dist-atten */

+	 emit_op2(p, OPCODE_MUL, att, 0, dist, att);

+      }

+      else {

+	 /* dist-atten */

+	 emit_op1(p, OPCODE_RCP, att, 0, dist);

+      }

+   }

+

+   return att;

+}

+

+

+/**

+ * Compute:

+ *   lit.y = MAX(0, dots.x)

+ *   lit.z = SLT(0, dots.x)

+ */

+static void emit_degenerate_lit( struct tnl_program *p,

+                                 struct ureg lit,

+                                 struct ureg dots )

+{

+   struct ureg id = get_identity_param(p);  /* id = {0,0,0,1} */

+

+   /* Note that lit.x & lit.w will not be examined.  Note also that

+    * dots.xyzw == dots.xxxx.

+    */

+

+   /* MAX lit, id, dots;

+    */

+   emit_op2(p, OPCODE_MAX, lit, WRITEMASK_XYZW, id, dots);

+

+   /* result[2] = (in > 0 ? 1 : 0)

+    * SLT lit.z, id.z, dots;   # lit.z = (0 < dots.z) ? 1 : 0

+    */

+   emit_op2(p, OPCODE_SLT, lit, WRITEMASK_Z, swizzle1(id,Z), dots);

+}

+

+

+/* Need to add some addtional parameters to allow lighting in object

+ * space - STATE_SPOT_DIRECTION and STATE_HALF_VECTOR implicitly assume eye

+ * space lighting.

+ */

+static void build_lighting( struct tnl_program *p )

+{

+   const GLboolean twoside = p->state->light_twoside;

+   const GLboolean separate = p->state->separate_specular;

+   GLuint nr_lights = 0, count = 0;

+   struct ureg normal = get_transformed_normal(p);

+   struct ureg lit = get_temp(p);

+   struct ureg dots = get_temp(p);

+   struct ureg _col0 = undef, _col1 = undef;

+   struct ureg _bfc0 = undef, _bfc1 = undef;

+   GLuint i;

+

+   /*

+    * NOTE:

+    * dots.x = dot(normal, VPpli)

+    * dots.y = dot(normal, halfAngle)

+    * dots.z = back.shininess

+    * dots.w = front.shininess

+    */

+

+   for (i = 0; i < MAX_LIGHTS; i++)

+      if (p->state->unit[i].light_enabled)

+	 nr_lights++;

+

+   set_material_flags(p);

+

+   {

+      if (!p->state->material_shininess_is_zero) {

+         struct ureg shininess = get_material(p, 0, STATE_SHININESS);

+         emit_op1(p, OPCODE_MOV, dots, WRITEMASK_W, swizzle1(shininess,X));

+         release_temp(p, shininess);

+      }

+

+      _col0 = make_temp(p, get_scenecolor(p, 0));

+      if (separate)

+	 _col1 = make_temp(p, get_identity_param(p));

+      else

+	 _col1 = _col0;

+   }

+

+   if (twoside) {

+      if (!p->state->material_shininess_is_zero) {

+         /* Note that we negate the back-face specular exponent here.

+          * The negation will be un-done later in the back-face code below.

+          */

+         struct ureg shininess = get_material(p, 1, STATE_SHININESS);

+         emit_op1(p, OPCODE_MOV, dots, WRITEMASK_Z,

+                  negate(swizzle1(shininess,X)));

+         release_temp(p, shininess);

+      }

+

+      _bfc0 = make_temp(p, get_scenecolor(p, 1));

+      if (separate)

+	 _bfc1 = make_temp(p, get_identity_param(p));

+      else

+	 _bfc1 = _bfc0;

+   }

+

+   /* If no lights, still need to emit the scenecolor.

+    */

+   {

+      struct ureg res0 = register_output( p, VERT_RESULT_COL0 );

+      emit_op1(p, OPCODE_MOV, res0, 0, _col0);

+   }

+

+   if (separate) {

+      struct ureg res1 = register_output( p, VERT_RESULT_COL1 );

+      emit_op1(p, OPCODE_MOV, res1, 0, _col1);

+   }

+

+   if (twoside) {

+      struct ureg res0 = register_output( p, VERT_RESULT_BFC0 );

+      emit_op1(p, OPCODE_MOV, res0, 0, _bfc0);

+   }

+

+   if (twoside && separate) {

+      struct ureg res1 = register_output( p, VERT_RESULT_BFC1 );

+      emit_op1(p, OPCODE_MOV, res1, 0, _bfc1);

+   }

+

+   if (nr_lights == 0) {

+      release_temps(p);

+      return;

+   }

+

+   for (i = 0; i < MAX_LIGHTS; i++) {

+      if (p->state->unit[i].light_enabled) {

+	 struct ureg half = undef;

+	 struct ureg att = undef, VPpli = undef;

+

+	 count++;

+

+	 if (p->state->unit[i].light_eyepos3_is_zero) {

+	    /* Can used precomputed constants in this case.

+	     * Attenuation never applies to infinite lights.

+	     */

+	    VPpli = register_param3(p, STATE_INTERNAL,

+				    STATE_LIGHT_POSITION_NORMALIZED, i);

+

+            if (!p->state->material_shininess_is_zero) {

+               if (p->state->light_local_viewer) {

+                  struct ureg eye_hat = get_eye_position_normalized(p);

+                  half = get_temp(p);

+                  emit_op2(p, OPCODE_SUB, half, 0, VPpli, eye_hat);

+                  emit_normalize_vec3(p, half, half);

+               }

+               else {

+                  half = register_param3(p, STATE_INTERNAL,

+                                         STATE_LIGHT_HALF_VECTOR, i);

+               }

+            }

+	 }

+	 else {

+	    struct ureg Ppli = register_param3(p, STATE_INTERNAL,

+					       STATE_LIGHT_POSITION, i);

+	    struct ureg V = get_eye_position(p);

+	    struct ureg dist = get_temp(p);

+

+	    VPpli = get_temp(p);

+

+	    /* Calculate VPpli vector

+	     */

+	    emit_op2(p, OPCODE_SUB, VPpli, 0, Ppli, V);

+

+	    /* Normalize VPpli.  The dist value also used in

+	     * attenuation below.

+	     */

+	    emit_op2(p, OPCODE_DP3, dist, 0, VPpli, VPpli);

+	    emit_op1(p, OPCODE_RSQ, dist, 0, dist);

+	    emit_op2(p, OPCODE_MUL, VPpli, 0, VPpli, dist);

+

+	    /* Calculate attenuation:

+	     */

+	    if (!p->state->unit[i].light_spotcutoff_is_180 ||

+		p->state->unit[i].light_attenuated) {

+	       att = calculate_light_attenuation(p, i, VPpli, dist);

+	    }

+

+	    /* Calculate viewer direction, or use infinite viewer:

+	     */

+            if (!p->state->material_shininess_is_zero) {

+               half = get_temp(p);

+

+               if (p->state->light_local_viewer) {

+                  struct ureg eye_hat = get_eye_position_normalized(p);

+                  emit_op2(p, OPCODE_SUB, half, 0, VPpli, eye_hat);

+               }

+               else {

+                  struct ureg z_dir = swizzle(get_identity_param(p),X,Y,W,Z);

+                  emit_op2(p, OPCODE_ADD, half, 0, VPpli, z_dir);

+               }

+

+               emit_normalize_vec3(p, half, half);

+            }

+

+	    release_temp(p, dist);

+	 }

+

+	 /* Calculate dot products:

+	  */

+         if (p->state->material_shininess_is_zero) {

+            emit_op2(p, OPCODE_DP3, dots, 0, normal, VPpli);

+         }

+         else {

+            emit_op2(p, OPCODE_DP3, dots, WRITEMASK_X, normal, VPpli);

+            emit_op2(p, OPCODE_DP3, dots, WRITEMASK_Y, normal, half);

+         }

+

+	 /* Front face lighting:

+	  */

+	 {

+	    struct ureg ambient = get_lightprod(p, i, 0, STATE_AMBIENT);

+	    struct ureg diffuse = get_lightprod(p, i, 0, STATE_DIFFUSE);

+	    struct ureg specular = get_lightprod(p, i, 0, STATE_SPECULAR);

+	    struct ureg res0, res1;

+	    GLuint mask0, mask1;

+

+	    if (count == nr_lights) {

+	       if (separate) {

+		  mask0 = WRITEMASK_XYZ;

+		  mask1 = WRITEMASK_XYZ;

+		  res0 = register_output( p, VERT_RESULT_COL0 );

+		  res1 = register_output( p, VERT_RESULT_COL1 );

+	       }

+	       else {

+		  mask0 = 0;

+		  mask1 = WRITEMASK_XYZ;

+		  res0 = _col0;

+		  res1 = register_output( p, VERT_RESULT_COL0 );

+	       }

+	    }

+            else {

+	       mask0 = 0;

+	       mask1 = 0;

+	       res0 = _col0;

+	       res1 = _col1;

+	    }

+

+	    if (!is_undef(att)) {

+               /* light is attenuated by distance */

+               emit_op1(p, OPCODE_LIT, lit, 0, dots);

+               emit_op2(p, OPCODE_MUL, lit, 0, lit, att);

+               emit_op3(p, OPCODE_MAD, _col0, 0, swizzle1(lit,X), ambient, _col0);

+            }

+            else if (!p->state->material_shininess_is_zero) {

+               /* there's a non-zero specular term */

+               emit_op1(p, OPCODE_LIT, lit, 0, dots);

+               emit_op2(p, OPCODE_ADD, _col0, 0, ambient, _col0);

+            }

+            else {

+               /* no attenutation, no specular */

+               emit_degenerate_lit(p, lit, dots);

+               emit_op2(p, OPCODE_ADD, _col0, 0, ambient, _col0);

+            }

+

+	    emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _col0);

+	    emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _col1);

+

+	    release_temp(p, ambient);

+	    release_temp(p, diffuse);

+	    release_temp(p, specular);

+	 }

+

+	 /* Back face lighting:

+	  */

+	 if (twoside) {

+	    struct ureg ambient = get_lightprod(p, i, 1, STATE_AMBIENT);

+	    struct ureg diffuse = get_lightprod(p, i, 1, STATE_DIFFUSE);

+	    struct ureg specular = get_lightprod(p, i, 1, STATE_SPECULAR);

+	    struct ureg res0, res1;

+	    GLuint mask0, mask1;

+

+	    if (count == nr_lights) {

+	       if (separate) {

+		  mask0 = WRITEMASK_XYZ;

+		  mask1 = WRITEMASK_XYZ;

+		  res0 = register_output( p, VERT_RESULT_BFC0 );

+		  res1 = register_output( p, VERT_RESULT_BFC1 );

+	       }

+	       else {

+		  mask0 = 0;

+		  mask1 = WRITEMASK_XYZ;

+		  res0 = _bfc0;

+		  res1 = register_output( p, VERT_RESULT_BFC0 );

+	       }

+	    }

+            else {

+	       res0 = _bfc0;

+	       res1 = _bfc1;

+	       mask0 = 0;

+	       mask1 = 0;

+	    }

+

+            /* For the back face we need to negate the X and Y component

+             * dot products.  dots.Z has the negated back-face specular

+             * exponent.  We swizzle that into the W position.  This

+             * negation makes the back-face specular term positive again.

+             */

+            dots = negate(swizzle(dots,X,Y,W,Z));

+

+	    if (!is_undef(att)) {

+               emit_op1(p, OPCODE_LIT, lit, 0, dots);

+	       emit_op2(p, OPCODE_MUL, lit, 0, lit, att);

+               emit_op3(p, OPCODE_MAD, _bfc0, 0, swizzle1(lit,X), ambient, _bfc0);

+            }

+            else if (!p->state->material_shininess_is_zero) {

+               emit_op1(p, OPCODE_LIT, lit, 0, dots);

+               emit_op2(p, OPCODE_ADD, _bfc0, 0, ambient, _bfc0); /**/

+            }

+            else {

+               emit_degenerate_lit(p, lit, dots);

+               emit_op2(p, OPCODE_ADD, _bfc0, 0, ambient, _bfc0);

+            }

+

+	    emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _bfc0);

+	    emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _bfc1);

+            /* restore dots to its original state for subsequent lights

+             * by negating and swizzling again.

+             */

+            dots = negate(swizzle(dots,X,Y,W,Z));

+

+	    release_temp(p, ambient);

+	    release_temp(p, diffuse);

+	    release_temp(p, specular);

+	 }

+

+	 release_temp(p, half);

+	 release_temp(p, VPpli);

+	 release_temp(p, att);

+      }

+   }

+

+   release_temps( p );

+}

+

+

+static void build_fog( struct tnl_program *p )

+{

+   struct ureg fog = register_output(p, VERT_RESULT_FOGC);

+   struct ureg input;

+

+   if (p->state->fog_source_is_depth) {

+      input = get_eye_position_z(p);

+   }

+   else {

+      input = swizzle1(register_input(p, VERT_ATTRIB_FOG), X);

+   }

+

+   /* result.fog = {abs(f),0,0,1}; */

+   emit_op1(p, OPCODE_ABS, fog, WRITEMASK_X, input);

+   emit_op1(p, OPCODE_MOV, fog, WRITEMASK_YZW, get_identity_param(p));

+}

+

+

+static void build_reflect_texgen( struct tnl_program *p,

+				  struct ureg dest,

+				  GLuint writemask )

+{

+   struct ureg normal = get_transformed_normal(p);

+   struct ureg eye_hat = get_eye_position_normalized(p);

+   struct ureg tmp = get_temp(p);

+

+   /* n.u */

+   emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);

+   /* 2n.u */

+   emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);

+   /* (-2n.u)n + u */

+   emit_op3(p, OPCODE_MAD, dest, writemask, negate(tmp), normal, eye_hat);

+

+   release_temp(p, tmp);

+}

+

+

+static void build_sphere_texgen( struct tnl_program *p,

+				 struct ureg dest,

+				 GLuint writemask )

+{

+   struct ureg normal = get_transformed_normal(p);

+   struct ureg eye_hat = get_eye_position_normalized(p);

+   struct ureg tmp = get_temp(p);

+   struct ureg half = register_scalar_const(p, .5);

+   struct ureg r = get_temp(p);

+   struct ureg inv_m = get_temp(p);

+   struct ureg id = get_identity_param(p);

+

+   /* Could share the above calculations, but it would be

+    * a fairly odd state for someone to set (both sphere and

+    * reflection active for different texture coordinate

+    * components.  Of course - if two texture units enable

+    * reflect and/or sphere, things start to tilt in favour

+    * of seperating this out:

+    */

+

+   /* n.u */

+   emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);

+   /* 2n.u */

+   emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);

+   /* (-2n.u)n + u */

+   emit_op3(p, OPCODE_MAD, r, 0, negate(tmp), normal, eye_hat);

+   /* r + 0,0,1 */

+   emit_op2(p, OPCODE_ADD, tmp, 0, r, swizzle(id,X,Y,W,Z));

+   /* rx^2 + ry^2 + (rz+1)^2 */

+   emit_op2(p, OPCODE_DP3, tmp, 0, tmp, tmp);

+   /* 2/m */

+   emit_op1(p, OPCODE_RSQ, tmp, 0, tmp);

+   /* 1/m */

+   emit_op2(p, OPCODE_MUL, inv_m, 0, tmp, half);

+   /* r/m + 1/2 */

+   emit_op3(p, OPCODE_MAD, dest, writemask, r, inv_m, half);

+

+   release_temp(p, tmp);

+   release_temp(p, r);

+   release_temp(p, inv_m);

+}

+

+

+static void build_texture_transform( struct tnl_program *p )

+{

+   GLuint i, j;

+

+   for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {

+

+      if (!(p->state->fragprog_inputs_read & FRAG_BIT_TEX(i)))

+	 continue;

+

+      if (p->state->unit[i].coord_replace)

+  	 continue;

+

+      if (p->state->unit[i].texgen_enabled ||

+	  p->state->unit[i].texmat_enabled) {

+

+	 GLuint texmat_enabled = p->state->unit[i].texmat_enabled;

+	 struct ureg out = register_output(p, VERT_RESULT_TEX0 + i);

+	 struct ureg out_texgen = undef;

+

+	 if (p->state->unit[i].texgen_enabled) {

+	    GLuint copy_mask = 0;

+	    GLuint sphere_mask = 0;

+	    GLuint reflect_mask = 0;

+	    GLuint normal_mask = 0;

+	    GLuint modes[4];

+

+	    if (texmat_enabled)

+	       out_texgen = get_temp(p);

+	    else

+	       out_texgen = out;

+

+	    modes[0] = p->state->unit[i].texgen_mode0;

+	    modes[1] = p->state->unit[i].texgen_mode1;

+	    modes[2] = p->state->unit[i].texgen_mode2;

+	    modes[3] = p->state->unit[i].texgen_mode3;

+

+	    for (j = 0; j < 4; j++) {

+	       switch (modes[j]) {

+	       case TXG_OBJ_LINEAR: {

+		  struct ureg obj = register_input(p, VERT_ATTRIB_POS);

+		  struct ureg plane =

+		     register_param3(p, STATE_TEXGEN, i,

+				     STATE_TEXGEN_OBJECT_S + j);

+

+		  emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,

+			   obj, plane );

+		  break;

+	       }

+	       case TXG_EYE_LINEAR: {

+		  struct ureg eye = get_eye_position(p);

+		  struct ureg plane =

+		     register_param3(p, STATE_TEXGEN, i,

+				     STATE_TEXGEN_EYE_S + j);

+

+		  emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,

+			   eye, plane );

+		  break;

+	       }

+	       case TXG_SPHERE_MAP:

+		  sphere_mask |= WRITEMASK_X << j;

+		  break;

+	       case TXG_REFLECTION_MAP:

+		  reflect_mask |= WRITEMASK_X << j;

+		  break;

+	       case TXG_NORMAL_MAP:

+		  normal_mask |= WRITEMASK_X << j;

+		  break;

+	       case TXG_NONE:

+		  copy_mask |= WRITEMASK_X << j;

+	       }

+	    }

+

+	    if (sphere_mask) {

+	       build_sphere_texgen(p, out_texgen, sphere_mask);

+	    }

+

+	    if (reflect_mask) {

+	       build_reflect_texgen(p, out_texgen, reflect_mask);

+	    }

+

+	    if (normal_mask) {

+	       struct ureg normal = get_transformed_normal(p);

+	       emit_op1(p, OPCODE_MOV, out_texgen, normal_mask, normal );

+	    }

+

+	    if (copy_mask) {

+	       struct ureg in = register_input(p, VERT_ATTRIB_TEX0+i);

+	       emit_op1(p, OPCODE_MOV, out_texgen, copy_mask, in );

+	    }

+	 }

+

+	 if (texmat_enabled) {

+	    struct ureg texmat[4];

+	    struct ureg in = (!is_undef(out_texgen) ?

+			      out_texgen :

+			      register_input(p, VERT_ATTRIB_TEX0+i));

+	    if (p->mvp_with_dp4) {

+	       register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3,

+				       0, texmat );

+	       emit_matrix_transform_vec4( p, out, texmat, in );

+	    }

+	    else {

+	       register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3,

+				       STATE_MATRIX_TRANSPOSE, texmat );

+	       emit_transpose_matrix_transform_vec4( p, out, texmat, in );

+	    }

+	 }

+

+	 release_temps(p);

+      }

+      else {

+	 emit_passthrough(p, VERT_ATTRIB_TEX0+i, VERT_RESULT_TEX0+i);

+      }

+   }

+}

+

+

+/**

+ * Point size attenuation computation.

+ */

+static void build_atten_pointsize( struct tnl_program *p )

+{

+   struct ureg eye = get_eye_position_z(p);

+   struct ureg state_size = register_param2(p, STATE_INTERNAL, STATE_POINT_SIZE_CLAMPED);

+   struct ureg state_attenuation = register_param1(p, STATE_POINT_ATTENUATION);

+   struct ureg out = register_output(p, VERT_RESULT_PSIZ);

+   struct ureg ut = get_temp(p);

+

+   /* dist = |eyez| */

+   emit_op1(p, OPCODE_ABS, ut, WRITEMASK_Y, swizzle1(eye, Z));

+   /* p1 + dist * (p2 + dist * p3); */

+   emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),

+		swizzle1(state_attenuation, Z), swizzle1(state_attenuation, Y));

+   emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),

+		ut, swizzle1(state_attenuation, X));

+

+   /* 1 / sqrt(factor) */

+   emit_op1(p, OPCODE_RSQ, ut, WRITEMASK_X, ut );

+

+#if 0

+   /* out = pointSize / sqrt(factor) */

+   emit_op2(p, OPCODE_MUL, out, WRITEMASK_X, ut, state_size);

+#else

+   /* this is a good place to clamp the point size since there's likely

+    * no hardware registers to clamp point size at rasterization time.

+    */

+   emit_op2(p, OPCODE_MUL, ut, WRITEMASK_X, ut, state_size);

+   emit_op2(p, OPCODE_MAX, ut, WRITEMASK_X, ut, swizzle1(state_size, Y));

+   emit_op2(p, OPCODE_MIN, out, WRITEMASK_X, ut, swizzle1(state_size, Z));

+#endif

+

+   release_temp(p, ut);

+}

+

+

+/**

+ * Pass-though per-vertex point size, from user's point size array.

+ */

+static void build_array_pointsize( struct tnl_program *p )

+{

+   struct ureg in = register_input(p, VERT_ATTRIB_POINT_SIZE);

+   struct ureg out = register_output(p, VERT_RESULT_PSIZ);

+   emit_op1(p, OPCODE_MOV, out, WRITEMASK_X, in);

+}

+

+

+static void build_tnl_program( struct tnl_program *p )

+{

+   /* Emit the program, starting with modelviewproject:

+    */

+   build_hpos(p);

+

+   /* Lighting calculations:

+    */

+   if (p->state->fragprog_inputs_read & (FRAG_BIT_COL0|FRAG_BIT_COL1)) {

+      if (p->state->light_global_enabled)

+	 build_lighting(p);

+      else {

+	 if (p->state->fragprog_inputs_read & FRAG_BIT_COL0)

+	    emit_passthrough(p, VERT_ATTRIB_COLOR0, VERT_RESULT_COL0);

+

+	 if (p->state->fragprog_inputs_read & FRAG_BIT_COL1)

+	    emit_passthrough(p, VERT_ATTRIB_COLOR1, VERT_RESULT_COL1);

+      }

+   }

+

+   if (p->state->fragprog_inputs_read & FRAG_BIT_FOGC)

+      build_fog(p);

+

+   if (p->state->fragprog_inputs_read & FRAG_BITS_TEX_ANY)

+      build_texture_transform(p);

+

+   if (p->state->point_attenuated)

+      build_atten_pointsize(p);

+   else if (p->state->point_array)

+      build_array_pointsize(p);

+

+   /* Finish up:

+    */

+   emit_op1(p, OPCODE_END, undef, 0, undef);

+

+   /* Disassemble:

+    */

+   if (DISASSEM) {

+      printf ("\n");

+   }

+}

+

+

+static void

+create_new_program( const struct state_key *key,

+                    struct gl_vertex_program *program,

+                    GLboolean mvp_with_dp4,

+                    GLuint max_temps)

+{

+   struct tnl_program p;

+

+   memset(&p, 0, sizeof(p));

+   p.state = key;

+   p.program = program;

+   p.eye_position = undef;

+   p.eye_position_z = undef;

+   p.eye_position_normalized = undef;

+   p.transformed_normal = undef;

+   p.identity = undef;

+   p.temp_in_use = 0;

+   p.mvp_with_dp4 = mvp_with_dp4;

+

+   if (max_temps >= sizeof(int) * 8)

+      p.temp_reserved = 0;

+   else

+      p.temp_reserved = ~((1<<max_temps)-1);

+

+   /* Start by allocating 32 instructions.

+    * If we need more, we'll grow the instruction array as needed.

+    */

+   p.max_inst = 32;

+   p.program->Base.Instructions = _mesa_alloc_instructions(p.max_inst);

+   p.program->Base.String = NULL;

+   p.program->Base.NumInstructions =

+   p.program->Base.NumTemporaries =

+   p.program->Base.NumParameters =

+   p.program->Base.NumAttributes = p.program->Base.NumAddressRegs = 0;

+   p.program->Base.Parameters = _mesa_new_parameter_list();

+   p.program->Base.InputsRead = 0;

+   p.program->Base.OutputsWritten = 0;

+

+   build_tnl_program( &p );

+}

+

+

+/**

+ * Return a vertex program which implements the current fixed-function

+ * transform/lighting/texgen operations.

+ * XXX move this into core mesa (main/)

+ */

+struct gl_vertex_program *

+_mesa_get_fixed_func_vertex_program(struct gl_context *ctx)

+{

+   struct gl_vertex_program *prog;

+   struct state_key key;

+

+   /* Grab all the relevent state and put it in a single structure:

+    */

+   make_state_key(ctx, &key);

+

+   /* Look for an already-prepared program for this state:

+    */

+   prog = (struct gl_vertex_program *)

+      _mesa_search_program_cache(ctx->VertexProgram.Cache, &key, sizeof(key));

+

+   if (!prog) {

+      /* OK, we'll have to build a new one */

+      if (0)

+         printf("Build new TNL program\n");

+

+      prog = (struct gl_vertex_program *)

+         ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);

+      if (!prog)

+         return NULL;

+

+      create_new_program( &key, prog,

+                          ctx->mvp_with_dp4,

+                          ctx->Const.VertexProgram.MaxTemps );

+

+#if 0

+      if (ctx->Driver.ProgramStringNotify)

+         ctx->Driver.ProgramStringNotify( ctx, GL_VERTEX_PROGRAM_ARB,

+                                          &prog->Base );

+#endif

+      _mesa_program_cache_insert(ctx, ctx->VertexProgram.Cache,

+                                 &key, sizeof(key), &prog->Base);

+   }

+

+   return prog;

+}