reactos/dll/opengl/mesa/src/mesa/program/prog_parameter_layout.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file prog_parameter_layout.c
  26  * \brief Helper functions to layout storage for program parameters
  27  *
  28  * \author Ian Romanick <ian.d.romanick@intel.com>
  29  */
  30
  31 #include "main/compiler.h"
  32 #include "main/mtypes.h"
  33 #include "prog_parameter.h"
  34 #include "prog_parameter_layout.h"
  35 #include "prog_instruction.h"
  36 #include "program_parser.h"
  37
  38 unsigned
  39 _mesa_combine_swizzles(unsigned base, unsigned applied)
  40 {
  41    unsigned swiz = 0;
  42    unsigned i;
  43
  44    for (i = 0; i < 4; i++) {
  45       const unsigned s = GET_SWZ(applied, i);
  46
  47       swiz |= ((s <= SWIZZLE_W) ? GET_SWZ(base, s) : s) << (i * 3);
  48    }
  49
  50    return swiz;
  51 }
  52
  53
  54 /**
  55  * Copy indirect access array from one parameter list to another
  56  *
  57  * \param src   Parameter array copied from
  58  * \param dst   Parameter array copied to
  59  * \param first Index of first element in \c src to copy
  60  * \param count Number of elements to copy
  61  *
  62  * \return
  63  * The location in \c dst of the first element copied from \c src on
  64  * success.  -1 on failure.
  65  *
  66  * \warning
  67  * This function assumes that there is already enough space available in
  68  * \c dst to hold all of the elements that will be copied over.
  69  */
  70 static int
  71 copy_indirect_accessed_array(struct gl_program_parameter_list *src,
  72                              struct gl_program_parameter_list *dst,
  73                              unsigned first, unsigned count)
  74 {
  75    const int base = dst->NumParameters;
  76    unsigned i, j;
  77
  78    for (i = first; i < (first + count); i++) {
  79       struct gl_program_parameter *curr = & src->Parameters[i];
  80
  81       if (curr->Type == PROGRAM_CONSTANT) {
  82          j = dst->NumParameters;
  83       } else {
  84          for (j = 0; j < dst->NumParameters; j++) {
  85             if (memcmp(dst->Parameters[j].StateIndexes, curr->StateIndexes,
  86                        sizeof(curr->StateIndexes)) == 0) {
  87                return -1;
  88             }
  89          }
  90       }
  91
  92       assert(j == dst->NumParameters);
  93
  94       /* copy src parameter [i] to dest parameter [j] */
  95       memcpy(& dst->Parameters[j], curr,
  96              sizeof(dst->Parameters[j]));
  97       memcpy(dst->ParameterValues[j], src->ParameterValues[i],
  98              sizeof(GLfloat) * 4);
  99
 100       /* Pointer to the string name was copied.  Null-out src param name
 101        * to prevent double free later.
 102        */
 103       curr->Name = NULL;
 104
 105       dst->NumParameters++;
 106    }
 107
 108    return base;
 109 }
 110
 111
 112 /**
 113  * XXX description???
 114  * \return GL_TRUE for success, GL_FALSE for failure
 115  */
 116 GLboolean
 117 _mesa_layout_parameters(struct asm_parser_state *state)
 118 {
 119    struct gl_program_parameter_list *layout;
 120    struct asm_instruction *inst;
 121    unsigned i;
 122
 123    layout =
 124       _mesa_new_parameter_list_sized(state->prog->Parameters->NumParameters);
 125
 126    /* PASS 1:  Move any parameters that are accessed indirectly from the
 127     * original parameter list to the new parameter list.
 128     */
 129    for (inst = state->inst_head; inst != NULL; inst = inst->next) {
 130       for (i = 0; i < 3; i++) {
 131          if (inst->SrcReg[i].Base.RelAddr) {
 132             /* Only attempt to add the to the new parameter list once.
 133              */
 134             if (!inst->SrcReg[i].Symbol->pass1_done) {
 135                const int new_begin =
 136                   copy_indirect_accessed_array(state->prog->Parameters, layout,
 137                       inst->SrcReg[i].Symbol->param_binding_begin,
 138                       inst->SrcReg[i].Symbol->param_binding_length);
 139
 140                if (new_begin < 0) {
 141                   _mesa_free_parameter_list(layout);
 142                   return GL_FALSE;
 143                }
 144
 145                inst->SrcReg[i].Symbol->param_binding_begin = new_begin;
 146                inst->SrcReg[i].Symbol->pass1_done = 1;
 147             }
 148
 149             /* Previously the Index was just the offset from the parameter
 150              * array.  Now that the base of the parameter array is known, the
 151              * index can be updated to its actual value.
 152              */
 153             inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
 154             inst->Base.SrcReg[i].Index +=
 155                inst->SrcReg[i].Symbol->param_binding_begin;
 156          }
 157       }
 158    }
 159
 160    /* PASS 2:  Move any parameters that are not accessed indirectly from the
 161     * original parameter list to the new parameter list.
 162     */
 163    for (inst = state->inst_head; inst != NULL; inst = inst->next) {
 164       for (i = 0; i < 3; i++) {
 165          const struct gl_program_parameter *p;
 166          const int idx = inst->SrcReg[i].Base.Index;
 167          unsigned swizzle = SWIZZLE_NOOP;
 168
 169          /* All relative addressed operands were processed on the first
 170           * pass.  Just skip them here.
 171           */
 172          if (inst->SrcReg[i].Base.RelAddr) {
 173             continue;
 174          }
 175
 176          if ((inst->SrcReg[i].Base.File <= PROGRAM_VARYING )
 177              || (inst->SrcReg[i].Base.File >= PROGRAM_WRITE_ONLY)) {
 178             continue;
 179          }
 180
 181          inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
 182          p = & state->prog->Parameters->Parameters[idx];
 183
 184          switch (p->Type) {
 185          case PROGRAM_CONSTANT: {
 186             const gl_constant_value *const v =
 187                state->prog->Parameters->ParameterValues[idx];
 188
 189             inst->Base.SrcReg[i].Index =
 190                _mesa_add_unnamed_constant(layout, v, p->Size, & swizzle);
 191
 192             inst->Base.SrcReg[i].Swizzle =
 193                _mesa_combine_swizzles(swizzle, inst->Base.SrcReg[i].Swizzle);
 194             break;
 195          }
 196
 197          case PROGRAM_STATE_VAR:
 198             inst->Base.SrcReg[i].Index =
 199                _mesa_add_state_reference(layout, p->StateIndexes);
 200             break;
 201
 202          default:
 203             break;
 204          }
 205
 206          inst->SrcReg[i].Base.File = p->Type;
 207          inst->Base.SrcReg[i].File = p->Type;
 208       }
 209    }
 210
 211    layout->StateFlags = state->prog->Parameters->StateFlags;
 212    _mesa_free_parameter_list(state->prog->Parameters);
 213    state->prog->Parameters = layout;
 214
 215    return GL_TRUE;
 216 }