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
  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
  98       dst->ParameterValueOffset[j] = dst->NumParameterValues;
  99
 100       gl_constant_value *pv_dst =
 101          dst->ParameterValues + dst->ParameterValueOffset[j];
 102       gl_constant_value *pv_src =
 103          src->ParameterValues + src->ParameterValueOffset[i];
 104
 105       memcpy(pv_dst, pv_src, MIN2(src->Parameters[i].Size, 4) *
 106              sizeof(GLfloat));
 107       dst->NumParameterValues += MIN2(dst->Parameters[j].Size, 4);
 108
 109
 110       /* Pointer to the string name was copied.  Null-out src param name
 111        * to prevent double free later.
 112        */
 113       curr->Name = NULL;
 114
 115       dst->NumParameters++;
 116    }
 117
 118    return base;
 119 }
 120
 121
 122 /**
 123  * XXX description???
 124  * \return GL_TRUE for success, GL_FALSE for failure
 125  */
 126 GLboolean
 127 _mesa_layout_parameters(struct asm_parser_state *state)
 128 {
 129    struct gl_program_parameter_list *layout;
 130    struct asm_instruction *inst;
 131    unsigned i;
 132
 133    layout =
 134       _mesa_new_parameter_list_sized(state->prog->Parameters->NumParameters);
 135
 136    /* PASS 1:  Move any parameters that are accessed indirectly from the
 137     * original parameter list to the new parameter list.
 138     */
 139    for (inst = state->inst_head; inst != NULL; inst = inst->next) {
 140       for (i = 0; i < 3; i++) {
 141          if (inst->SrcReg[i].Base.RelAddr) {
 142             /* Only attempt to add the to the new parameter list once.
 143              */
 144             if (!inst->SrcReg[i].Symbol->pass1_done) {
 145                const int new_begin =
 146                   copy_indirect_accessed_array(state->prog->Parameters, layout,
 147                       inst->SrcReg[i].Symbol->param_binding_begin,
 148                       inst->SrcReg[i].Symbol->param_binding_length);
 149
 150                if (new_begin < 0) {
 151                   _mesa_free_parameter_list(layout);
 152                   return GL_FALSE;
 153                }
 154
 155                inst->SrcReg[i].Symbol->param_binding_begin = new_begin;
 156                inst->SrcReg[i].Symbol->pass1_done = 1;
 157             }
 158
 159             /* Previously the Index was just the offset from the parameter
 160              * array.  Now that the base of the parameter array is known, the
 161              * index can be updated to its actual value.
 162              */
 163             inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
 164             inst->Base.SrcReg[i].Index +=
 165                inst->SrcReg[i].Symbol->param_binding_begin;
 166          }
 167       }
 168    }
 169
 170    /* PASS 2:  Move any parameters that are not accessed indirectly from the
 171     * original parameter list to the new parameter list.
 172     */
 173    for (inst = state->inst_head; inst != NULL; inst = inst->next) {
 174       for (i = 0; i < 3; i++) {
 175          const struct gl_program_parameter *p;
 176          const int idx = inst->SrcReg[i].Base.Index;
 177          unsigned swizzle = SWIZZLE_NOOP;
 178
 179          /* All relative addressed operands were processed on the first
 180           * pass.  Just skip them here.
 181           */
 182          if (inst->SrcReg[i].Base.RelAddr) {
 183             continue;
 184          }
 185
 186          if ((inst->SrcReg[i].Base.File <= PROGRAM_OUTPUT)
 187              || (inst->SrcReg[i].Base.File >= PROGRAM_WRITE_ONLY)) {
 188             continue;
 189          }
 190
 191          inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
 192          p = & state->prog->Parameters->Parameters[idx];
 193
 194          switch (p->Type) {
 195          case PROGRAM_CONSTANT: {
 196             unsigned pvo = state->prog->Parameters->ParameterValueOffset[idx];
 197             const gl_constant_value *const v =
 198                state->prog->Parameters->ParameterValues + pvo;
 199
 200             inst->Base.SrcReg[i].Index =
 201                _mesa_add_unnamed_constant(layout, v, p->Size, & swizzle);
 202
 203             inst->Base.SrcReg[i].Swizzle =
 204                _mesa_combine_swizzles(swizzle, inst->Base.SrcReg[i].Swizzle);
 205             break;
 206          }
 207
 208          case PROGRAM_STATE_VAR:
 209             inst->Base.SrcReg[i].Index =
 210                _mesa_add_state_reference(layout, p->StateIndexes);
 211             break;
 212
 213          default:
 214             break;
 215          }
 216
 217          inst->SrcReg[i].Base.File = p->Type;
 218          inst->Base.SrcReg[i].File = p->Type;
 219       }
 220    }
 221
 222    layout->StateFlags = state->prog->Parameters->StateFlags;
 223    _mesa_free_parameter_list(state->prog->Parameters);
 224    state->prog->Parameters = layout;
 225
 226    return GL_TRUE;
 227 }