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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the
  8.  * "Software"), to deal in the Software without restriction, including
  9.  * without limitation the rights to use, copy, modify, merge, publish,
  10.  * distribute, sub license, and/or sell copies of the Software, and to
  11.  * permit persons to whom the Software is furnished to do so, subject to
  12.  * the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  
  28. /*
  29.  * \author
  30.  * Michal Krol,
  31.  * Keith Whitwell
  32.  */
  33.  
  34. #include "pipe/p_compiler.h"
  35. #include "pipe/p_context.h"
  36. #include "pipe/p_screen.h"
  37. #include "pipe/p_shader_tokens.h"
  38. #include "pipe/p_state.h"
  39. #include "tgsi/tgsi_ureg.h"
  40. #include "st_mesa_to_tgsi.h"
  41. #include "st_context.h"
  42. #include "program/prog_instruction.h"
  43. #include "program/prog_parameter.h"
  44. #include "util/u_debug.h"
  45. #include "util/u_math.h"
  46. #include "util/u_memory.h"
  47.  
  48.  
  49. #define PROGRAM_ANY_CONST ((1 << PROGRAM_LOCAL_PARAM) |  \
  50.                            (1 << PROGRAM_ENV_PARAM) |    \
  51.                            (1 << PROGRAM_STATE_VAR) |    \
  52.                            (1 << PROGRAM_CONSTANT) |     \
  53.                            (1 << PROGRAM_UNIFORM))
  54.  
  55.  
  56. struct label {
  57.    unsigned branch_target;
  58.    unsigned token;
  59. };
  60.  
  61.  
  62. /**
  63.  * Intermediate state used during shader translation.
  64.  */
  65. struct st_translate {
  66.    struct ureg_program *ureg;
  67.  
  68.    struct ureg_dst temps[MAX_PROGRAM_TEMPS];
  69.    struct ureg_src *constants;
  70.    struct ureg_dst outputs[PIPE_MAX_SHADER_OUTPUTS];
  71.    struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS];
  72.    struct ureg_dst address[1];
  73.    struct ureg_src samplers[PIPE_MAX_SAMPLERS];
  74.    struct ureg_src systemValues[SYSTEM_VALUE_MAX];
  75.  
  76.    const GLuint *inputMapping;
  77.    const GLuint *outputMapping;
  78.  
  79.    /* For every instruction that contains a label (eg CALL), keep
  80.     * details so that we can go back afterwards and emit the correct
  81.     * tgsi instruction number for each label.
  82.     */
  83.    struct label *labels;
  84.    unsigned labels_size;
  85.    unsigned labels_count;
  86.  
  87.    /* Keep a record of the tgsi instruction number that each mesa
  88.     * instruction starts at, will be used to fix up labels after
  89.     * translation.
  90.     */
  91.    unsigned *insn;
  92.    unsigned insn_size;
  93.    unsigned insn_count;
  94.  
  95.    unsigned procType;  /**< TGSI_PROCESSOR_VERTEX/FRAGMENT */
  96.  
  97.    boolean error;
  98. };
  99.  
  100.  
  101. /** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
  102. static unsigned mesa_sysval_to_semantic[SYSTEM_VALUE_MAX] = {
  103.    TGSI_SEMANTIC_FACE,
  104.    TGSI_SEMANTIC_VERTEXID,
  105.    TGSI_SEMANTIC_INSTANCEID
  106. };
  107.  
  108.  
  109. /**
  110.  * Make note of a branch to a label in the TGSI code.
  111.  * After we've emitted all instructions, we'll go over the list
  112.  * of labels built here and patch the TGSI code with the actual
  113.  * location of each label.
  114.  */
  115. static unsigned *get_label( struct st_translate *t,
  116.                             unsigned branch_target )
  117. {
  118.    unsigned i;
  119.  
  120.    if (t->labels_count + 1 >= t->labels_size) {
  121.       t->labels_size = 1 << (util_logbase2(t->labels_size) + 1);
  122.       t->labels = realloc(t->labels, t->labels_size * sizeof t->labels[0]);
  123.       if (t->labels == NULL) {
  124.          static unsigned dummy;
  125.          t->error = TRUE;
  126.          return &dummy;
  127.       }
  128.    }
  129.  
  130.    i = t->labels_count++;
  131.    t->labels[i].branch_target = branch_target;
  132.    return &t->labels[i].token;
  133. }
  134.  
  135.  
  136. /**
  137.  * Called prior to emitting the TGSI code for each Mesa instruction.
  138.  * Allocate additional space for instructions if needed.
  139.  * Update the insn[] array so the next Mesa instruction points to
  140.  * the next TGSI instruction.
  141.  */
  142. static void set_insn_start( struct st_translate *t,
  143.                             unsigned start )
  144. {
  145.    if (t->insn_count + 1 >= t->insn_size) {
  146.       t->insn_size = 1 << (util_logbase2(t->insn_size) + 1);
  147.       t->insn = realloc(t->insn, t->insn_size * sizeof t->insn[0]);
  148.       if (t->insn == NULL) {
  149.          t->error = TRUE;
  150.          return;
  151.       }
  152.    }
  153.  
  154.    t->insn[t->insn_count++] = start;
  155. }
  156.  
  157.  
  158. /**
  159.  * Map a Mesa dst register to a TGSI ureg_dst register.
  160.  */
  161. static struct ureg_dst
  162. dst_register( struct st_translate *t,
  163.               gl_register_file file,
  164.               GLuint index )
  165. {
  166.    switch( file ) {
  167.    case PROGRAM_UNDEFINED:
  168.       return ureg_dst_undef();
  169.  
  170.    case PROGRAM_TEMPORARY:
  171.       if (ureg_dst_is_undef(t->temps[index]))
  172.          t->temps[index] = ureg_DECL_temporary( t->ureg );
  173.  
  174.       return t->temps[index];
  175.  
  176.    case PROGRAM_OUTPUT:
  177.       if (t->procType == TGSI_PROCESSOR_VERTEX)
  178.          assert(index < VARYING_SLOT_MAX);
  179.       else if (t->procType == TGSI_PROCESSOR_FRAGMENT)
  180.          assert(index < FRAG_RESULT_MAX);
  181.       else
  182.          assert(index < VARYING_SLOT_MAX);
  183.  
  184.       assert(t->outputMapping[index] < Elements(t->outputs));
  185.  
  186.       return t->outputs[t->outputMapping[index]];
  187.  
  188.    case PROGRAM_ADDRESS:
  189.       return t->address[index];
  190.  
  191.    default:
  192.       debug_assert( 0 );
  193.       return ureg_dst_undef();
  194.    }
  195. }
  196.  
  197.  
  198. /**
  199.  * Map a Mesa src register to a TGSI ureg_src register.
  200.  */
  201. static struct ureg_src
  202. src_register( struct st_translate *t,
  203.               gl_register_file file,
  204.               GLint index )
  205. {
  206.    switch( file ) {
  207.    case PROGRAM_UNDEFINED:
  208.       return ureg_src_undef();
  209.  
  210.    case PROGRAM_TEMPORARY:
  211.       assert(index >= 0);
  212.       assert(index < Elements(t->temps));
  213.       if (ureg_dst_is_undef(t->temps[index]))
  214.          t->temps[index] = ureg_DECL_temporary( t->ureg );
  215.       return ureg_src(t->temps[index]);
  216.  
  217.    case PROGRAM_ENV_PARAM:
  218.    case PROGRAM_LOCAL_PARAM:
  219.    case PROGRAM_UNIFORM:
  220.       assert(index >= 0);
  221.       return t->constants[index];
  222.    case PROGRAM_STATE_VAR:
  223.    case PROGRAM_CONSTANT:       /* ie, immediate */
  224.       if (index < 0)
  225.          return ureg_DECL_constant( t->ureg, 0 );
  226.       else
  227.          return t->constants[index];
  228.  
  229.    case PROGRAM_INPUT:
  230.       assert(t->inputMapping[index] < Elements(t->inputs));
  231.       return t->inputs[t->inputMapping[index]];
  232.  
  233.    case PROGRAM_OUTPUT:
  234.       assert(t->outputMapping[index] < Elements(t->outputs));
  235.       return ureg_src(t->outputs[t->outputMapping[index]]); /* not needed? */
  236.  
  237.    case PROGRAM_ADDRESS:
  238.       return ureg_src(t->address[index]);
  239.  
  240.    case PROGRAM_SYSTEM_VALUE:
  241.       assert(index < Elements(t->systemValues));
  242.       return t->systemValues[index];
  243.  
  244.    default:
  245.       debug_assert( 0 );
  246.       return ureg_src_undef();
  247.    }
  248. }
  249.  
  250.  
  251. /**
  252.  * Map mesa texture target to TGSI texture target.
  253.  */
  254. unsigned
  255. st_translate_texture_target( GLuint textarget,
  256.                           GLboolean shadow )
  257. {
  258.    if (shadow) {
  259.       switch( textarget ) {
  260.       case TEXTURE_1D_INDEX:   return TGSI_TEXTURE_SHADOW1D;
  261.       case TEXTURE_2D_INDEX:   return TGSI_TEXTURE_SHADOW2D;
  262.       case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_SHADOWRECT;
  263.       case TEXTURE_1D_ARRAY_INDEX: return TGSI_TEXTURE_SHADOW1D_ARRAY;
  264.       case TEXTURE_2D_ARRAY_INDEX: return TGSI_TEXTURE_SHADOW2D_ARRAY;
  265.       case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_SHADOWCUBE;
  266.       case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_SHADOWCUBE_ARRAY;
  267.       default: break;
  268.       }
  269.    }
  270.  
  271.    switch( textarget ) {
  272.    case TEXTURE_2D_MULTISAMPLE_INDEX: return TGSI_TEXTURE_2D_MSAA;
  273.    case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY_MSAA;
  274.    case TEXTURE_BUFFER_INDEX: return TGSI_TEXTURE_BUFFER;
  275.    case TEXTURE_1D_INDEX:   return TGSI_TEXTURE_1D;
  276.    case TEXTURE_2D_INDEX:   return TGSI_TEXTURE_2D;
  277.    case TEXTURE_3D_INDEX:   return TGSI_TEXTURE_3D;
  278.    case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_CUBE;
  279.    case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_CUBE_ARRAY;
  280.    case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_RECT;
  281.    case TEXTURE_1D_ARRAY_INDEX:   return TGSI_TEXTURE_1D_ARRAY;
  282.    case TEXTURE_2D_ARRAY_INDEX:   return TGSI_TEXTURE_2D_ARRAY;
  283.    case TEXTURE_EXTERNAL_INDEX:   return TGSI_TEXTURE_2D;
  284.    default:
  285.       debug_assert( 0 );
  286.       return TGSI_TEXTURE_1D;
  287.    }
  288. }
  289.  
  290.  
  291. /**
  292.  * Create a TGSI ureg_dst register from a Mesa dest register.
  293.  */
  294. static struct ureg_dst
  295. translate_dst( struct st_translate *t,
  296.                const struct prog_dst_register *DstReg,
  297.                boolean saturate,
  298.                boolean clamp_color)
  299. {
  300.    struct ureg_dst dst = dst_register( t,
  301.                                        DstReg->File,
  302.                                        DstReg->Index );
  303.  
  304.    dst = ureg_writemask( dst,
  305.                          DstReg->WriteMask );
  306.    
  307.    if (saturate)
  308.       dst = ureg_saturate( dst );
  309.    else if (clamp_color && DstReg->File == PROGRAM_OUTPUT) {
  310.       /* Clamp colors for ARB_color_buffer_float. */
  311.       switch (t->procType) {
  312.       case TGSI_PROCESSOR_VERTEX:
  313.          /* XXX if the geometry shader is present, this must be done there
  314.           * instead of here. */
  315.          if (DstReg->Index == VARYING_SLOT_COL0 ||
  316.              DstReg->Index == VARYING_SLOT_COL1 ||
  317.              DstReg->Index == VARYING_SLOT_BFC0 ||
  318.              DstReg->Index == VARYING_SLOT_BFC1) {
  319.             dst = ureg_saturate(dst);
  320.          }
  321.          break;
  322.  
  323.       case TGSI_PROCESSOR_FRAGMENT:
  324.          if (DstReg->Index >= FRAG_RESULT_COLOR) {
  325.             dst = ureg_saturate(dst);
  326.          }
  327.          break;
  328.       }
  329.    }
  330.  
  331.    if (DstReg->RelAddr)
  332.       dst = ureg_dst_indirect( dst, ureg_src(t->address[0]) );
  333.  
  334.    return dst;
  335. }
  336.  
  337.  
  338. /**
  339.  * Create a TGSI ureg_src register from a Mesa src register.
  340.  */
  341. static struct ureg_src
  342. translate_src( struct st_translate *t,
  343.                const struct prog_src_register *SrcReg )
  344. {
  345.    struct ureg_src src = src_register( t, SrcReg->File, SrcReg->Index );
  346.  
  347.    if (t->procType == TGSI_PROCESSOR_GEOMETRY && SrcReg->HasIndex2) {
  348.       src = src_register( t, SrcReg->File, SrcReg->Index2 );
  349.       if (SrcReg->RelAddr2)
  350.          src = ureg_src_dimension_indirect( src, ureg_src(t->address[0]),
  351.                                             SrcReg->Index);
  352.       else
  353.          src = ureg_src_dimension( src, SrcReg->Index);
  354.    }
  355.  
  356.    src = ureg_swizzle( src,
  357.                        GET_SWZ( SrcReg->Swizzle, 0 ) & 0x3,
  358.                        GET_SWZ( SrcReg->Swizzle, 1 ) & 0x3,
  359.                        GET_SWZ( SrcReg->Swizzle, 2 ) & 0x3,
  360.                        GET_SWZ( SrcReg->Swizzle, 3 ) & 0x3);
  361.  
  362.    if (SrcReg->Negate == NEGATE_XYZW)
  363.       src = ureg_negate(src);
  364.  
  365.    if (SrcReg->Abs)
  366.       src = ureg_abs(src);
  367.  
  368.    if (SrcReg->RelAddr) {
  369.       src = ureg_src_indirect( src, ureg_src(t->address[0]));
  370.       if (SrcReg->File != PROGRAM_INPUT &&
  371.           SrcReg->File != PROGRAM_OUTPUT) {
  372.          /* If SrcReg->Index was negative, it was set to zero in
  373.           * src_register().  Reassign it now.  But don't do this
  374.           * for input/output regs since they get remapped while
  375.           * const buffers don't.
  376.           */
  377.          src.Index = SrcReg->Index;
  378.       }
  379.    }
  380.  
  381.    return src;
  382. }
  383.  
  384.  
  385. static struct ureg_src swizzle_4v( struct ureg_src src,
  386.                                    const unsigned *swz )
  387. {
  388.    return ureg_swizzle( src, swz[0], swz[1], swz[2], swz[3] );
  389. }
  390.  
  391.  
  392. /**
  393.  * Translate a SWZ instruction into a MOV, MUL or MAD instruction.  EG:
  394.  *
  395.  *   SWZ dst, src.x-y10
  396.  *
  397.  * becomes:
  398.  *
  399.  *   MAD dst {1,-1,0,0}, src.xyxx, {0,0,1,0}
  400.  */
  401. static void emit_swz( struct st_translate *t,
  402.                       struct ureg_dst dst,
  403.                       const struct prog_src_register *SrcReg )
  404. {
  405.    struct ureg_program *ureg = t->ureg;
  406.    struct ureg_src src = src_register( t, SrcReg->File, SrcReg->Index );
  407.  
  408.    unsigned negate_mask =  SrcReg->Negate;
  409.  
  410.    unsigned one_mask = ((GET_SWZ(SrcReg->Swizzle, 0) == SWIZZLE_ONE) << 0 |
  411.                         (GET_SWZ(SrcReg->Swizzle, 1) == SWIZZLE_ONE) << 1 |
  412.                         (GET_SWZ(SrcReg->Swizzle, 2) == SWIZZLE_ONE) << 2 |
  413.                         (GET_SWZ(SrcReg->Swizzle, 3) == SWIZZLE_ONE) << 3);
  414.  
  415.    unsigned zero_mask = ((GET_SWZ(SrcReg->Swizzle, 0) == SWIZZLE_ZERO) << 0 |
  416.                          (GET_SWZ(SrcReg->Swizzle, 1) == SWIZZLE_ZERO) << 1 |
  417.                          (GET_SWZ(SrcReg->Swizzle, 2) == SWIZZLE_ZERO) << 2 |
  418.                          (GET_SWZ(SrcReg->Swizzle, 3) == SWIZZLE_ZERO) << 3);
  419.  
  420.    unsigned negative_one_mask = one_mask & negate_mask;
  421.    unsigned positive_one_mask = one_mask & ~negate_mask;
  422.    
  423.    struct ureg_src imm;
  424.    unsigned i;
  425.    unsigned mul_swizzle[4] = {0,0,0,0};
  426.    unsigned add_swizzle[4] = {0,0,0,0};
  427.    unsigned src_swizzle[4] = {0,0,0,0};
  428.    boolean need_add = FALSE;
  429.    boolean need_mul = FALSE;
  430.  
  431.    if (dst.WriteMask == 0)
  432.       return;
  433.  
  434.    /* Is this just a MOV?
  435.     */
  436.    if (zero_mask == 0 &&
  437.        one_mask == 0 &&
  438.        (negate_mask == 0 || negate_mask == TGSI_WRITEMASK_XYZW))
  439.    {
  440.       ureg_MOV( ureg, dst, translate_src( t, SrcReg ));
  441.       return;
  442.    }
  443.  
  444. #define IMM_ZERO    0
  445. #define IMM_ONE     1
  446. #define IMM_NEG_ONE 2
  447.  
  448.    imm = ureg_imm3f( ureg, 0, 1, -1 );
  449.  
  450.    for (i = 0; i < 4; i++) {
  451.       unsigned bit = 1 << i;
  452.  
  453.       if (dst.WriteMask & bit) {
  454.          if (positive_one_mask & bit) {
  455.             mul_swizzle[i] = IMM_ZERO;
  456.             add_swizzle[i] = IMM_ONE;
  457.             need_add = TRUE;
  458.          }
  459.          else if (negative_one_mask & bit) {
  460.             mul_swizzle[i] = IMM_ZERO;
  461.             add_swizzle[i] = IMM_NEG_ONE;
  462.             need_add = TRUE;
  463.          }
  464.          else if (zero_mask & bit) {
  465.             mul_swizzle[i] = IMM_ZERO;
  466.             add_swizzle[i] = IMM_ZERO;
  467.             need_add = TRUE;
  468.          }
  469.          else {
  470.             add_swizzle[i] = IMM_ZERO;
  471.             src_swizzle[i] = GET_SWZ(SrcReg->Swizzle, i);
  472.             need_mul = TRUE;
  473.             if (negate_mask & bit) {
  474.                mul_swizzle[i] = IMM_NEG_ONE;
  475.             }
  476.             else {
  477.                mul_swizzle[i] = IMM_ONE;
  478.             }
  479.          }
  480.       }
  481.    }
  482.  
  483.    if (need_mul && need_add) {
  484.       ureg_MAD( ureg,
  485.                 dst,
  486.                 swizzle_4v( src, src_swizzle ),
  487.                 swizzle_4v( imm, mul_swizzle ),
  488.                 swizzle_4v( imm, add_swizzle ) );
  489.    }
  490.    else if (need_mul) {
  491.       ureg_MUL( ureg,
  492.                 dst,
  493.                 swizzle_4v( src, src_swizzle ),
  494.                 swizzle_4v( imm, mul_swizzle ) );
  495.    }
  496.    else if (need_add) {
  497.       ureg_MOV( ureg,
  498.                 dst,
  499.                 swizzle_4v( imm, add_swizzle ) );
  500.    }
  501.    else {
  502.       debug_assert(0);
  503.    }
  504.  
  505. #undef IMM_ZERO
  506. #undef IMM_ONE
  507. #undef IMM_NEG_ONE
  508. }
  509.  
  510.  
  511. /**
  512.  * Negate the value of DDY to match GL semantics where (0,0) is the
  513.  * lower-left corner of the window.
  514.  * Note that the GL_ARB_fragment_coord_conventions extension will
  515.  * effect this someday.
  516.  */
  517. static void emit_ddy( struct st_translate *t,
  518.                       struct ureg_dst dst,
  519.                       const struct prog_src_register *SrcReg )
  520. {
  521.    struct ureg_program *ureg = t->ureg;
  522.    struct ureg_src src = translate_src( t, SrcReg );
  523.    src = ureg_negate( src );
  524.    ureg_DDY( ureg, dst, src );
  525. }
  526.  
  527.  
  528.  
  529. static unsigned
  530. translate_opcode( unsigned op )
  531. {
  532.    switch( op ) {
  533.    case OPCODE_ARL:
  534.       return TGSI_OPCODE_ARL;
  535.    case OPCODE_ABS:
  536.       return TGSI_OPCODE_ABS;
  537.    case OPCODE_ADD:
  538.       return TGSI_OPCODE_ADD;
  539.    case OPCODE_BGNLOOP:
  540.       return TGSI_OPCODE_BGNLOOP;
  541.    case OPCODE_BGNSUB:
  542.       return TGSI_OPCODE_BGNSUB;
  543.    case OPCODE_BRK:
  544.       return TGSI_OPCODE_BRK;
  545.    case OPCODE_CAL:
  546.       return TGSI_OPCODE_CAL;
  547.    case OPCODE_CMP:
  548.       return TGSI_OPCODE_CMP;
  549.    case OPCODE_CONT:
  550.       return TGSI_OPCODE_CONT;
  551.    case OPCODE_COS:
  552.       return TGSI_OPCODE_COS;
  553.    case OPCODE_DDX:
  554.       return TGSI_OPCODE_DDX;
  555.    case OPCODE_DDY:
  556.       return TGSI_OPCODE_DDY;
  557.    case OPCODE_DP2:
  558.       return TGSI_OPCODE_DP2;
  559.    case OPCODE_DP3:
  560.       return TGSI_OPCODE_DP3;
  561.    case OPCODE_DP4:
  562.       return TGSI_OPCODE_DP4;
  563.    case OPCODE_DPH:
  564.       return TGSI_OPCODE_DPH;
  565.    case OPCODE_DST:
  566.       return TGSI_OPCODE_DST;
  567.    case OPCODE_ELSE:
  568.       return TGSI_OPCODE_ELSE;
  569.    case OPCODE_ENDIF:
  570.       return TGSI_OPCODE_ENDIF;
  571.    case OPCODE_ENDLOOP:
  572.       return TGSI_OPCODE_ENDLOOP;
  573.    case OPCODE_ENDSUB:
  574.       return TGSI_OPCODE_ENDSUB;
  575.    case OPCODE_EX2:
  576.       return TGSI_OPCODE_EX2;
  577.    case OPCODE_EXP:
  578.       return TGSI_OPCODE_EXP;
  579.    case OPCODE_FLR:
  580.       return TGSI_OPCODE_FLR;
  581.    case OPCODE_FRC:
  582.       return TGSI_OPCODE_FRC;
  583.    case OPCODE_IF:
  584.       return TGSI_OPCODE_IF;
  585.    case OPCODE_TRUNC:
  586.       return TGSI_OPCODE_TRUNC;
  587.    case OPCODE_KIL:
  588.       return TGSI_OPCODE_KILL_IF;
  589.    case OPCODE_KIL_NV:
  590.       /* XXX we don't support condition codes in TGSI */
  591.       return TGSI_OPCODE_KILL;
  592.    case OPCODE_LG2:
  593.       return TGSI_OPCODE_LG2;
  594.    case OPCODE_LOG:
  595.       return TGSI_OPCODE_LOG;
  596.    case OPCODE_LIT:
  597.       return TGSI_OPCODE_LIT;
  598.    case OPCODE_LRP:
  599.       return TGSI_OPCODE_LRP;
  600.    case OPCODE_MAD:
  601.       return TGSI_OPCODE_MAD;
  602.    case OPCODE_MAX:
  603.       return TGSI_OPCODE_MAX;
  604.    case OPCODE_MIN:
  605.       return TGSI_OPCODE_MIN;
  606.    case OPCODE_MOV:
  607.       return TGSI_OPCODE_MOV;
  608.    case OPCODE_MUL:
  609.       return TGSI_OPCODE_MUL;
  610.    case OPCODE_NOP:
  611.       return TGSI_OPCODE_NOP;
  612.    case OPCODE_POW:
  613.       return TGSI_OPCODE_POW;
  614.    case OPCODE_RCP:
  615.       return TGSI_OPCODE_RCP;
  616.    case OPCODE_RET:
  617.       return TGSI_OPCODE_RET;
  618.    case OPCODE_SCS:
  619.       return TGSI_OPCODE_SCS;
  620.    case OPCODE_SEQ:
  621.       return TGSI_OPCODE_SEQ;
  622.    case OPCODE_SGE:
  623.       return TGSI_OPCODE_SGE;
  624.    case OPCODE_SGT:
  625.       return TGSI_OPCODE_SGT;
  626.    case OPCODE_SIN:
  627.       return TGSI_OPCODE_SIN;
  628.    case OPCODE_SLE:
  629.       return TGSI_OPCODE_SLE;
  630.    case OPCODE_SLT:
  631.       return TGSI_OPCODE_SLT;
  632.    case OPCODE_SNE:
  633.       return TGSI_OPCODE_SNE;
  634.    case OPCODE_SSG:
  635.       return TGSI_OPCODE_SSG;
  636.    case OPCODE_SUB:
  637.       return TGSI_OPCODE_SUB;
  638.    case OPCODE_TEX:
  639.       return TGSI_OPCODE_TEX;
  640.    case OPCODE_TXB:
  641.       return TGSI_OPCODE_TXB;
  642.    case OPCODE_TXD:
  643.       return TGSI_OPCODE_TXD;
  644.    case OPCODE_TXL:
  645.       return TGSI_OPCODE_TXL;
  646.    case OPCODE_TXP:
  647.       return TGSI_OPCODE_TXP;
  648.    case OPCODE_XPD:
  649.       return TGSI_OPCODE_XPD;
  650.    case OPCODE_END:
  651.       return TGSI_OPCODE_END;
  652.    default:
  653.       debug_assert( 0 );
  654.       return TGSI_OPCODE_NOP;
  655.    }
  656. }
  657.  
  658.  
  659. static void
  660. compile_instruction(
  661.    struct gl_context *ctx,
  662.    struct st_translate *t,
  663.    const struct prog_instruction *inst,
  664.    boolean clamp_dst_color_output)
  665. {
  666.    struct ureg_program *ureg = t->ureg;
  667.    GLuint i;
  668.    struct ureg_dst dst[1] = { { 0 } };
  669.    struct ureg_src src[4];
  670.    unsigned num_dst;
  671.    unsigned num_src;
  672.  
  673.    num_dst = _mesa_num_inst_dst_regs( inst->Opcode );
  674.    num_src = _mesa_num_inst_src_regs( inst->Opcode );
  675.  
  676.    if (num_dst)
  677.       dst[0] = translate_dst( t,
  678.                               &inst->DstReg,
  679.                               inst->SaturateMode,
  680.                               clamp_dst_color_output);
  681.  
  682.    for (i = 0; i < num_src; i++)
  683.       src[i] = translate_src( t, &inst->SrcReg[i] );
  684.  
  685.    switch( inst->Opcode ) {
  686.    case OPCODE_SWZ:
  687.       emit_swz( t, dst[0], &inst->SrcReg[0] );
  688.       return;
  689.  
  690.    case OPCODE_BGNLOOP:
  691.    case OPCODE_CAL:
  692.    case OPCODE_ELSE:
  693.    case OPCODE_ENDLOOP:
  694.       debug_assert(num_dst == 0);
  695.       ureg_label_insn( ureg,
  696.                        translate_opcode( inst->Opcode ),
  697.                        src, num_src,
  698.                        get_label( t, inst->BranchTarget ));
  699.       return;
  700.  
  701.    case OPCODE_IF:
  702.       debug_assert(num_dst == 0);
  703.       ureg_label_insn( ureg,
  704.                        ctx->Const.NativeIntegers ? TGSI_OPCODE_UIF : TGSI_OPCODE_IF,
  705.                        src, num_src,
  706.                        get_label( t, inst->BranchTarget ));
  707.       return;
  708.  
  709.    case OPCODE_TEX:
  710.    case OPCODE_TXB:
  711.    case OPCODE_TXD:
  712.    case OPCODE_TXL:
  713.    case OPCODE_TXP:
  714.       src[num_src++] = t->samplers[inst->TexSrcUnit];
  715.       ureg_tex_insn( ureg,
  716.                      translate_opcode( inst->Opcode ),
  717.                      dst, num_dst,
  718.                      st_translate_texture_target( inst->TexSrcTarget,
  719.                                                inst->TexShadow ),
  720.                      NULL, 0,
  721.                      src, num_src );
  722.       return;
  723.  
  724.    case OPCODE_SCS:
  725.       dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XY );
  726.       ureg_insn( ureg,
  727.                  translate_opcode( inst->Opcode ),
  728.                  dst, num_dst,
  729.                  src, num_src );
  730.       break;
  731.  
  732.    case OPCODE_XPD:
  733.       dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XYZ );
  734.       ureg_insn( ureg,
  735.                  translate_opcode( inst->Opcode ),
  736.                  dst, num_dst,
  737.                  src, num_src );
  738.       break;
  739.  
  740.    case OPCODE_NOISE1:
  741.    case OPCODE_NOISE2:
  742.    case OPCODE_NOISE3:
  743.    case OPCODE_NOISE4:
  744.       /* At some point, a motivated person could add a better
  745.        * implementation of noise.  Currently not even the nvidia
  746.        * binary drivers do anything more than this.  In any case, the
  747.        * place to do this is in the GL state tracker, not the poor
  748.        * driver.
  749.        */
  750.       ureg_MOV( ureg, dst[0], ureg_imm1f(ureg, 0.5) );
  751.       break;
  752.                  
  753.    case OPCODE_DDY:
  754.       emit_ddy( t, dst[0], &inst->SrcReg[0] );
  755.       break;
  756.  
  757.    case OPCODE_RSQ:
  758.       ureg_RSQ( ureg, dst[0], ureg_abs(src[0]) );
  759.       break;
  760.  
  761.    default:
  762.       ureg_insn( ureg,
  763.                  translate_opcode( inst->Opcode ),
  764.                  dst, num_dst,
  765.                  src, num_src );
  766.       break;
  767.    }
  768. }
  769.  
  770.  
  771. /**
  772.  * Emit the TGSI instructions for inverting and adjusting WPOS.
  773.  * This code is unavoidable because it also depends on whether
  774.  * a FBO is bound (STATE_FB_WPOS_Y_TRANSFORM).
  775.  */
  776. static void
  777. emit_wpos_adjustment( struct st_translate *t,
  778.                       const struct gl_program *program,
  779.                       boolean invert,
  780.                       GLfloat adjX, GLfloat adjY[2])
  781. {
  782.    struct ureg_program *ureg = t->ureg;
  783.  
  784.    /* Fragment program uses fragment position input.
  785.     * Need to replace instances of INPUT[WPOS] with temp T
  786.     * where T = INPUT[WPOS] by y is inverted.
  787.     */
  788.    static const gl_state_index wposTransformState[STATE_LENGTH]
  789.       = { STATE_INTERNAL, STATE_FB_WPOS_Y_TRANSFORM, 0, 0, 0 };
  790.    
  791.    /* XXX: note we are modifying the incoming shader here!  Need to
  792.     * do this before emitting the constant decls below, or this
  793.     * will be missed:
  794.     */
  795.    unsigned wposTransConst = _mesa_add_state_reference(program->Parameters,
  796.                                                        wposTransformState);
  797.  
  798.    struct ureg_src wpostrans = ureg_DECL_constant( ureg, wposTransConst );
  799.    struct ureg_dst wpos_temp = ureg_DECL_temporary( ureg );
  800.    struct ureg_src wpos_input = t->inputs[t->inputMapping[VARYING_SLOT_POS]];
  801.  
  802.    /* First, apply the coordinate shift: */
  803.    if (adjX || adjY[0] || adjY[1]) {
  804.       if (adjY[0] != adjY[1]) {
  805.          /* Adjust the y coordinate by adjY[1] or adjY[0] respectively
  806.           * depending on whether inversion is actually going to be applied
  807.           * or not, which is determined by testing against the inversion
  808.           * state variable used below, which will be either +1 or -1.
  809.           */
  810.          struct ureg_dst adj_temp = ureg_DECL_temporary(ureg);
  811.  
  812.          ureg_CMP(ureg, adj_temp,
  813.                   ureg_scalar(wpostrans, invert ? 2 : 0),
  814.                   ureg_imm4f(ureg, adjX, adjY[0], 0.0f, 0.0f),
  815.                   ureg_imm4f(ureg, adjX, adjY[1], 0.0f, 0.0f));
  816.          ureg_ADD(ureg, wpos_temp, wpos_input, ureg_src(adj_temp));
  817.       } else {
  818.          ureg_ADD(ureg, wpos_temp, wpos_input,
  819.                   ureg_imm4f(ureg, adjX, adjY[0], 0.0f, 0.0f));
  820.       }
  821.       wpos_input = ureg_src(wpos_temp);
  822.    } else {
  823.       /* MOV wpos_temp, input[wpos]
  824.        */
  825.       ureg_MOV( ureg, wpos_temp, wpos_input );
  826.    }
  827.  
  828.    /* Now the conditional y flip: STATE_FB_WPOS_Y_TRANSFORM.xy/zw will be
  829.     * inversion/identity, or the other way around if we're drawing to an FBO.
  830.     */
  831.    if (invert) {
  832.       /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy
  833.        */
  834.       ureg_MAD( ureg,
  835.                 ureg_writemask(wpos_temp, TGSI_WRITEMASK_Y ),
  836.                 wpos_input,
  837.                 ureg_scalar(wpostrans, 0),
  838.                 ureg_scalar(wpostrans, 1));
  839.    } else {
  840.       /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww
  841.        */
  842.       ureg_MAD( ureg,
  843.                 ureg_writemask(wpos_temp, TGSI_WRITEMASK_Y ),
  844.                 wpos_input,
  845.                 ureg_scalar(wpostrans, 2),
  846.                 ureg_scalar(wpostrans, 3));
  847.    }
  848.  
  849.    /* Use wpos_temp as position input from here on:
  850.     */
  851.    t->inputs[t->inputMapping[VARYING_SLOT_POS]] = ureg_src(wpos_temp);
  852. }
  853.  
  854.  
  855. /**
  856.  * Emit fragment position/ooordinate code.
  857.  */
  858. static void
  859. emit_wpos(struct st_context *st,
  860.           struct st_translate *t,
  861.           const struct gl_program *program,
  862.           struct ureg_program *ureg)
  863. {
  864.    const struct gl_fragment_program *fp =
  865.       (const struct gl_fragment_program *) program;
  866.    struct pipe_screen *pscreen = st->pipe->screen;
  867.    GLfloat adjX = 0.0f;
  868.    GLfloat adjY[2] = { 0.0f, 0.0f };
  869.    boolean invert = FALSE;
  870.  
  871.    /* Query the pixel center conventions supported by the pipe driver and set
  872.     * adjX, adjY to help out if it cannot handle the requested one internally.
  873.     *
  874.     * The bias of the y-coordinate depends on whether y-inversion takes place
  875.     * (adjY[1]) or not (adjY[0]), which is in turn dependent on whether we are
  876.     * drawing to an FBO (causes additional inversion), and whether the the pipe
  877.     * driver origin and the requested origin differ (the latter condition is
  878.     * stored in the 'invert' variable).
  879.     *
  880.     * For height = 100 (i = integer, h = half-integer, l = lower, u = upper):
  881.     *
  882.     * center shift only:
  883.     * i -> h: +0.5
  884.     * h -> i: -0.5
  885.     *
  886.     * inversion only:
  887.     * l,i -> u,i: ( 0.0 + 1.0) * -1 + 100 = 99
  888.     * l,h -> u,h: ( 0.5 + 0.0) * -1 + 100 = 99.5
  889.     * u,i -> l,i: (99.0 + 1.0) * -1 + 100 = 0
  890.     * u,h -> l,h: (99.5 + 0.0) * -1 + 100 = 0.5
  891.     *
  892.     * inversion and center shift:
  893.     * l,i -> u,h: ( 0.0 + 0.5) * -1 + 100 = 99.5
  894.     * l,h -> u,i: ( 0.5 + 0.5) * -1 + 100 = 99
  895.     * u,i -> l,h: (99.0 + 0.5) * -1 + 100 = 0.5
  896.     * u,h -> l,i: (99.5 + 0.5) * -1 + 100 = 0
  897.     */
  898.    if (fp->OriginUpperLeft) {
  899.       /* Fragment shader wants origin in upper-left */
  900.       if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT)) {
  901.          /* the driver supports upper-left origin */
  902.       }
  903.       else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT)) {
  904.          /* the driver supports lower-left origin, need to invert Y */
  905.          ureg_property_fs_coord_origin(ureg, TGSI_FS_COORD_ORIGIN_LOWER_LEFT);
  906.          invert = TRUE;
  907.       }
  908.       else
  909.          assert(0);
  910.    }
  911.    else {
  912.       /* Fragment shader wants origin in lower-left */
  913.       if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT))
  914.          /* the driver supports lower-left origin */
  915.          ureg_property_fs_coord_origin(ureg, TGSI_FS_COORD_ORIGIN_LOWER_LEFT);
  916.       else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT))
  917.          /* the driver supports upper-left origin, need to invert Y */
  918.          invert = TRUE;
  919.       else
  920.          assert(0);
  921.    }
  922.    
  923.    if (fp->PixelCenterInteger) {
  924.       /* Fragment shader wants pixel center integer */
  925.       if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER)) {
  926.          /* the driver supports pixel center integer */
  927.          adjY[1] = 1.0f;
  928.          ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER);
  929.       }
  930.       else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER)) {
  931.          /* the driver supports pixel center half integer, need to bias X,Y */
  932.          adjX = -0.5f;
  933.          adjY[0] = -0.5f;
  934.          adjY[1] = 0.5f;
  935.       }
  936.       else
  937.          assert(0);
  938.    }
  939.    else {
  940.       /* Fragment shader wants pixel center half integer */
  941.       if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER)) {
  942.          /* the driver supports pixel center half integer */
  943.       }
  944.       else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER)) {
  945.          /* the driver supports pixel center integer, need to bias X,Y */
  946.          adjX = adjY[0] = adjY[1] = 0.5f;
  947.          ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER);
  948.       }
  949.       else
  950.          assert(0);
  951.    }
  952.  
  953.    /* we invert after adjustment so that we avoid the MOV to temporary,
  954.     * and reuse the adjustment ADD instead */
  955.    emit_wpos_adjustment(t, program, invert, adjX, adjY);
  956. }
  957.  
  958.  
  959. /**
  960.  * OpenGL's fragment gl_FrontFace input is 1 for front-facing, 0 for back.
  961.  * TGSI uses +1 for front, -1 for back.
  962.  * This function converts the TGSI value to the GL value.  Simply clamping/
  963.  * saturating the value to [0,1] does the job.
  964.  */
  965. static void
  966. emit_face_var( struct st_translate *t,
  967.                const struct gl_program *program )
  968. {
  969.    struct ureg_program *ureg = t->ureg;
  970.    struct ureg_dst face_temp = ureg_DECL_temporary( ureg );
  971.    struct ureg_src face_input = t->inputs[t->inputMapping[VARYING_SLOT_FACE]];
  972.  
  973.    /* MOV_SAT face_temp, input[face]
  974.     */
  975.    face_temp = ureg_saturate( face_temp );
  976.    ureg_MOV( ureg, face_temp, face_input );
  977.  
  978.    /* Use face_temp as face input from here on:
  979.     */
  980.    t->inputs[t->inputMapping[VARYING_SLOT_FACE]] = ureg_src(face_temp);
  981. }
  982.  
  983.  
  984. static void
  985. emit_edgeflags( struct st_translate *t,
  986.                  const struct gl_program *program )
  987. {
  988.    struct ureg_program *ureg = t->ureg;
  989.    struct ureg_dst edge_dst = t->outputs[t->outputMapping[VARYING_SLOT_EDGE]];
  990.    struct ureg_src edge_src = t->inputs[t->inputMapping[VERT_ATTRIB_EDGEFLAG]];
  991.  
  992.    ureg_MOV( ureg, edge_dst, edge_src );
  993. }
  994.  
  995.  
  996. /**
  997.  * Translate Mesa program to TGSI format.
  998.  * \param program  the program to translate
  999.  * \param numInputs  number of input registers used
  1000.  * \param inputMapping  maps Mesa fragment program inputs to TGSI generic
  1001.  *                      input indexes
  1002.  * \param inputSemanticName  the TGSI_SEMANTIC flag for each input
  1003.  * \param inputSemanticIndex  the semantic index (ex: which texcoord) for
  1004.  *                            each input
  1005.  * \param interpMode  the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input
  1006.  * \param numOutputs  number of output registers used
  1007.  * \param outputMapping  maps Mesa fragment program outputs to TGSI
  1008.  *                       generic outputs
  1009.  * \param outputSemanticName  the TGSI_SEMANTIC flag for each output
  1010.  * \param outputSemanticIndex  the semantic index (ex: which texcoord) for
  1011.  *                             each output
  1012.  *
  1013.  * \return  PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY
  1014.  */
  1015. enum pipe_error
  1016. st_translate_mesa_program(
  1017.    struct gl_context *ctx,
  1018.    uint procType,
  1019.    struct ureg_program *ureg,
  1020.    const struct gl_program *program,
  1021.    GLuint numInputs,
  1022.    const GLuint inputMapping[],
  1023.    const ubyte inputSemanticName[],
  1024.    const ubyte inputSemanticIndex[],
  1025.    const GLuint interpMode[],
  1026.    GLuint numOutputs,
  1027.    const GLuint outputMapping[],
  1028.    const ubyte outputSemanticName[],
  1029.    const ubyte outputSemanticIndex[],
  1030.    boolean passthrough_edgeflags,
  1031.    boolean clamp_color)
  1032. {
  1033.    struct st_translate translate, *t;
  1034.    unsigned i;
  1035.    enum pipe_error ret = PIPE_OK;
  1036.  
  1037.    assert(numInputs <= Elements(t->inputs));
  1038.    assert(numOutputs <= Elements(t->outputs));
  1039.  
  1040.    t = &translate;
  1041.    memset(t, 0, sizeof *t);
  1042.  
  1043.    t->procType = procType;
  1044.    t->inputMapping = inputMapping;
  1045.    t->outputMapping = outputMapping;
  1046.    t->ureg = ureg;
  1047.  
  1048.    /*_mesa_print_program(program);*/
  1049.  
  1050.    /*
  1051.     * Declare input attributes.
  1052.     */
  1053.    if (procType == TGSI_PROCESSOR_FRAGMENT) {
  1054.       for (i = 0; i < numInputs; i++) {
  1055.          t->inputs[i] = ureg_DECL_fs_input(ureg,
  1056.                                            inputSemanticName[i],
  1057.                                            inputSemanticIndex[i],
  1058.                                            interpMode[i]);
  1059.       }
  1060.  
  1061.       if (program->InputsRead & VARYING_BIT_POS) {
  1062.          /* Must do this after setting up t->inputs, and before
  1063.           * emitting constant references, below:
  1064.           */
  1065.          emit_wpos(st_context(ctx), t, program, ureg);
  1066.       }
  1067.  
  1068.       if (program->InputsRead & VARYING_BIT_FACE) {
  1069.          emit_face_var( t, program );
  1070.       }
  1071.  
  1072.       /*
  1073.        * Declare output attributes.
  1074.        */
  1075.       for (i = 0; i < numOutputs; i++) {
  1076.          switch (outputSemanticName[i]) {
  1077.          case TGSI_SEMANTIC_POSITION:
  1078.             t->outputs[i] = ureg_DECL_output( ureg,
  1079.                                               TGSI_SEMANTIC_POSITION, /* Z / Depth */
  1080.                                               outputSemanticIndex[i] );
  1081.  
  1082.             t->outputs[i] = ureg_writemask( t->outputs[i],
  1083.                                             TGSI_WRITEMASK_Z );
  1084.             break;
  1085.          case TGSI_SEMANTIC_STENCIL:
  1086.             t->outputs[i] = ureg_DECL_output( ureg,
  1087.                                               TGSI_SEMANTIC_STENCIL, /* Stencil */
  1088.                                               outputSemanticIndex[i] );
  1089.             t->outputs[i] = ureg_writemask( t->outputs[i],
  1090.                                             TGSI_WRITEMASK_Y );
  1091.             break;
  1092.          case TGSI_SEMANTIC_COLOR:
  1093.             t->outputs[i] = ureg_DECL_output( ureg,
  1094.                                               TGSI_SEMANTIC_COLOR,
  1095.                                               outputSemanticIndex[i] );
  1096.             break;
  1097.          default:
  1098.             debug_assert(0);
  1099.             return 0;
  1100.          }
  1101.       }
  1102.    }
  1103.    else if (procType == TGSI_PROCESSOR_GEOMETRY) {
  1104.       for (i = 0; i < numInputs; i++) {
  1105.          t->inputs[i] = ureg_DECL_gs_input(ureg,
  1106.                                            i,
  1107.                                            inputSemanticName[i],
  1108.                                            inputSemanticIndex[i]);
  1109.       }
  1110.  
  1111.       for (i = 0; i < numOutputs; i++) {
  1112.          t->outputs[i] = ureg_DECL_output( ureg,
  1113.                                            outputSemanticName[i],
  1114.                                            outputSemanticIndex[i] );
  1115.       }
  1116.    }
  1117.    else {
  1118.       assert(procType == TGSI_PROCESSOR_VERTEX);
  1119.  
  1120.       for (i = 0; i < numInputs; i++) {
  1121.          t->inputs[i] = ureg_DECL_vs_input(ureg, i);
  1122.       }
  1123.  
  1124.       for (i = 0; i < numOutputs; i++) {
  1125.          t->outputs[i] = ureg_DECL_output( ureg,
  1126.                                            outputSemanticName[i],
  1127.                                            outputSemanticIndex[i] );
  1128.       }
  1129.       if (passthrough_edgeflags)
  1130.          emit_edgeflags( t, program );
  1131.    }
  1132.  
  1133.    /* Declare address register.
  1134.     */
  1135.    if (program->NumAddressRegs > 0) {
  1136.       debug_assert( program->NumAddressRegs == 1 );
  1137.       t->address[0] = ureg_DECL_address( ureg );
  1138.    }
  1139.  
  1140.    /* Declare misc input registers
  1141.     */
  1142.    {
  1143.       GLbitfield sysInputs = program->SystemValuesRead;
  1144.       unsigned numSys = 0;
  1145.       for (i = 0; sysInputs; i++) {
  1146.          if (sysInputs & (1 << i)) {
  1147.             unsigned semName = mesa_sysval_to_semantic[i];
  1148.             t->systemValues[i] = ureg_DECL_system_value(ureg, numSys, semName, 0);
  1149.             if (semName == TGSI_SEMANTIC_INSTANCEID ||
  1150.                 semName == TGSI_SEMANTIC_VERTEXID) {
  1151.                /* From Gallium perspective, these system values are always
  1152.                 * integer, and require native integer support.  However, if
  1153.                 * native integer is supported on the vertex stage but not the
  1154.                 * pixel stage (e.g, i915g + draw), Mesa will generate IR that
  1155.                 * assumes these system values are floats. To resolve the
  1156.                 * inconsistency, we insert a U2F.
  1157.                 */
  1158.                struct st_context *st = st_context(ctx);
  1159.                struct pipe_screen *pscreen = st->pipe->screen;
  1160.                assert(procType == TGSI_PROCESSOR_VERTEX);
  1161.                assert(pscreen->get_shader_param(pscreen, PIPE_SHADER_VERTEX, PIPE_SHADER_CAP_INTEGERS));
  1162.                (void) pscreen;  /* silence non-debug build warnings */
  1163.                if (!ctx->Const.NativeIntegers) {
  1164.                   struct ureg_dst temp = ureg_DECL_local_temporary(t->ureg);
  1165.                   ureg_U2F( t->ureg, ureg_writemask(temp, TGSI_WRITEMASK_X), t->systemValues[i]);
  1166.                   t->systemValues[i] = ureg_scalar(ureg_src(temp), 0);
  1167.                }
  1168.             }
  1169.             numSys++;
  1170.             sysInputs &= ~(1 << i);
  1171.          }
  1172.       }
  1173.    }
  1174.  
  1175.    if (program->IndirectRegisterFiles & (1 << PROGRAM_TEMPORARY)) {
  1176.       /* If temps are accessed with indirect addressing, declare temporaries
  1177.        * in sequential order.  Else, we declare them on demand elsewhere.
  1178.        */
  1179.       for (i = 0; i < program->NumTemporaries; i++) {
  1180.          /* XXX use TGSI_FILE_TEMPORARY_ARRAY when it's supported by ureg */
  1181.          t->temps[i] = ureg_DECL_temporary( t->ureg );
  1182.       }
  1183.    }
  1184.  
  1185.    /* Emit constants and immediates.  Mesa uses a single index space
  1186.     * for these, so we put all the translated regs in t->constants.
  1187.     */
  1188.    if (program->Parameters) {
  1189.       t->constants = calloc( program->Parameters->NumParameters,
  1190.                              sizeof t->constants[0] );
  1191.       if (t->constants == NULL) {
  1192.          ret = PIPE_ERROR_OUT_OF_MEMORY;
  1193.          goto out;
  1194.       }
  1195.  
  1196.       for (i = 0; i < program->Parameters->NumParameters; i++) {
  1197.          switch (program->Parameters->Parameters[i].Type) {
  1198.          case PROGRAM_ENV_PARAM:
  1199.          case PROGRAM_LOCAL_PARAM:
  1200.          case PROGRAM_STATE_VAR:
  1201.          case PROGRAM_UNIFORM:
  1202.             t->constants[i] = ureg_DECL_constant( ureg, i );
  1203.             break;
  1204.  
  1205.             /* Emit immediates only when there's no indirect addressing of
  1206.              * the const buffer.
  1207.              * FIXME: Be smarter and recognize param arrays:
  1208.              * indirect addressing is only valid within the referenced
  1209.              * array.
  1210.              */
  1211.          case PROGRAM_CONSTANT:
  1212.             if (program->IndirectRegisterFiles & PROGRAM_ANY_CONST)
  1213.                t->constants[i] = ureg_DECL_constant( ureg, i );
  1214.             else
  1215.                t->constants[i] =
  1216.                   ureg_DECL_immediate( ureg,
  1217.                                        (const float*) program->Parameters->ParameterValues[i],
  1218.                                        4 );
  1219.             break;
  1220.          default:
  1221.             break;
  1222.          }
  1223.       }
  1224.    }
  1225.  
  1226.    /* texture samplers */
  1227.    for (i = 0; i < ctx->Const.FragmentProgram.MaxTextureImageUnits; i++) {
  1228.       if (program->SamplersUsed & (1 << i)) {
  1229.          t->samplers[i] = ureg_DECL_sampler( ureg, i );
  1230.       }
  1231.    }
  1232.  
  1233.    /* Emit each instruction in turn:
  1234.     */
  1235.    for (i = 0; i < program->NumInstructions; i++) {
  1236.       set_insn_start( t, ureg_get_instruction_number( ureg ));
  1237.       compile_instruction( ctx, t, &program->Instructions[i], clamp_color );
  1238.    }
  1239.  
  1240.    /* Fix up all emitted labels:
  1241.     */
  1242.    for (i = 0; i < t->labels_count; i++) {
  1243.       ureg_fixup_label( ureg,
  1244.                         t->labels[i].token,
  1245.                         t->insn[t->labels[i].branch_target] );
  1246.    }
  1247.  
  1248. out:
  1249.    free(t->insn);
  1250.    free(t->labels);
  1251.    free(t->constants);
  1252.  
  1253.    if (t->error) {
  1254.       debug_printf("%s: translate error flag set\n", __FUNCTION__);
  1255.    }
  1256.  
  1257.    return ret;
  1258. }
  1259.  
  1260.  
  1261. /**
  1262.  * Tokens cannot be free with free otherwise the builtin gallium
  1263.  * malloc debugging will get confused.
  1264.  */
  1265. void
  1266. st_free_tokens(const struct tgsi_token *tokens)
  1267. {
  1268.    ureg_free_tokens(tokens);
  1269. }
  1270.