[mesa.git] / src / mesa / drivers / dri / r300 / compiler / r500_fragprog.c

/*
 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
 *
 * 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, sublicense, 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 NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
 *
 */

#include "compiler/r500_fragprog.h"

#include "r300_reg.h"

static void reset_srcreg(struct prog_src_register* reg)
{
        _mesa_bzero(reg, sizeof(*reg));
        reg->Swizzle = SWIZZLE_NOOP;
}

static struct prog_src_register shadow_ambient(struct gl_program *program, int tmu)
{
        gl_state_index fail_value_tokens[STATE_LENGTH] = {
                STATE_INTERNAL, STATE_SHADOW_AMBIENT, 0, 0, 0
        };
        struct prog_src_register reg = { 0, };

        fail_value_tokens[2] = tmu;
        reg.File = PROGRAM_STATE_VAR;
        reg.Index = _mesa_add_state_reference(program->Parameters, fail_value_tokens);
        reg.Swizzle = SWIZZLE_WWWW;
        return reg;
}

/**
 * Transform TEX, TXP, TXB, and KIL instructions in the following way:
 *  - premultiply texture coordinates for RECT
 *  - extract operand swizzles
 *  - introduce a temporary register when write masks are needed
 *
 */
GLboolean r500_transform_TEX(
        struct radeon_transform_context *t,
        struct prog_instruction* orig_inst, void* data)
{
        struct r300_fragment_program_compiler *compiler =
                (struct r300_fragment_program_compiler*)data;
        struct prog_instruction inst = *orig_inst;
        struct prog_instruction* tgt;
        GLboolean destredirect = GL_FALSE;

        if (inst.Opcode != OPCODE_TEX &&
            inst.Opcode != OPCODE_TXB &&
            inst.Opcode != OPCODE_TXP &&
            inst.Opcode != OPCODE_KIL)
                return GL_FALSE;

        /* ARB_shadow & EXT_shadow_funcs */
        if (inst.Opcode != OPCODE_KIL &&
            t->Program->ShadowSamplers & (1 << inst.TexSrcUnit)) {
                GLuint comparefunc = GL_NEVER + compiler->state.unit[inst.TexSrcUnit].texture_compare_func;

                if (comparefunc == GL_NEVER || comparefunc == GL_ALWAYS) {
                        tgt = radeonAppendInstructions(t->Program, 1);

                        tgt->Opcode = OPCODE_MOV;
                        tgt->DstReg = inst.DstReg;
                        if (comparefunc == GL_ALWAYS) {
                                tgt->SrcReg[0].File = PROGRAM_BUILTIN;
                                tgt->SrcReg[0].Swizzle = SWIZZLE_1111;
                        } else {
                                tgt->SrcReg[0] = shadow_ambient(t->Program, inst.TexSrcUnit);
                        }
                        return GL_TRUE;
                }

                inst.DstReg.File = PROGRAM_TEMPORARY;
                inst.DstReg.Index = radeonFindFreeTemporary(t);
                inst.DstReg.WriteMask = WRITEMASK_XYZW;
        } else if (inst.Opcode != OPCODE_KIL && inst.DstReg.File != PROGRAM_TEMPORARY) {
                int tempreg = radeonFindFreeTemporary(t);

                inst.DstReg.File = PROGRAM_TEMPORARY;
                inst.DstReg.Index = tempreg;
                inst.DstReg.WriteMask = WRITEMASK_XYZW;
                destredirect = GL_TRUE;
        }

        if (inst.SrcReg[0].File != PROGRAM_TEMPORARY && inst.SrcReg[0].File != PROGRAM_INPUT) {
                int tmpreg = radeonFindFreeTemporary(t);
                tgt = radeonAppendInstructions(t->Program, 1);
                tgt->Opcode = OPCODE_MOV;
                tgt->DstReg.File = PROGRAM_TEMPORARY;
                tgt->DstReg.Index = tmpreg;
                tgt->SrcReg[0] = inst.SrcReg[0];

                reset_srcreg(&inst.SrcReg[0]);
                inst.SrcReg[0].File = PROGRAM_TEMPORARY;
                inst.SrcReg[0].Index = tmpreg;
        }

        tgt = radeonAppendInstructions(t->Program, 1);
        _mesa_copy_instructions(tgt, &inst, 1);

        if (inst.Opcode != OPCODE_KIL &&
            t->Program->ShadowSamplers & (1 << inst.TexSrcUnit)) {
                GLuint comparefunc = GL_NEVER + compiler->state.unit[inst.TexSrcUnit].texture_compare_func;
                GLuint depthmode = compiler->state.unit[inst.TexSrcUnit].depth_texture_mode;
                int rcptemp = radeonFindFreeTemporary(t);
                int pass, fail;

                tgt = radeonAppendInstructions(t->Program, 3);

                tgt[0].Opcode = OPCODE_RCP;
                tgt[0].DstReg.File = PROGRAM_TEMPORARY;
                tgt[0].DstReg.Index = rcptemp;
                tgt[0].DstReg.WriteMask = WRITEMASK_W;
                tgt[0].SrcReg[0] = inst.SrcReg[0];
                tgt[0].SrcReg[0].Swizzle = SWIZZLE_WWWW;

                tgt[1].Opcode = OPCODE_MAD;
                tgt[1].DstReg = inst.DstReg;
                tgt[1].DstReg.WriteMask = orig_inst->DstReg.WriteMask;
                tgt[1].SrcReg[0] = inst.SrcReg[0];
                tgt[1].SrcReg[0].Swizzle = SWIZZLE_ZZZZ;
                tgt[1].SrcReg[1].File = PROGRAM_TEMPORARY;
                tgt[1].SrcReg[1].Index = rcptemp;
                tgt[1].SrcReg[1].Swizzle = SWIZZLE_WWWW;
                tgt[1].SrcReg[2].File = PROGRAM_TEMPORARY;
                tgt[1].SrcReg[2].Index = inst.DstReg.Index;
                if (depthmode == 0) /* GL_LUMINANCE */
                        tgt[1].SrcReg[2].Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z);
                else if (depthmode == 2) /* GL_ALPHA */
                        tgt[1].SrcReg[2].Swizzle = SWIZZLE_WWWW;

                /* Recall that SrcReg[0] is tex, SrcReg[2] is r and:
                 *   r  < tex  <=>      -tex+r < 0
                 *   r >= tex  <=> not (-tex+r < 0 */
                if (comparefunc == GL_LESS || comparefunc == GL_GEQUAL)
                        tgt[1].SrcReg[2].Negate = tgt[0].SrcReg[2].Negate ^ NEGATE_XYZW;
                else
                        tgt[1].SrcReg[0].Negate = tgt[0].SrcReg[0].Negate ^ NEGATE_XYZW;

                tgt[2].Opcode = OPCODE_CMP;
                tgt[2].DstReg = orig_inst->DstReg;
                tgt[2].SrcReg[0].File = PROGRAM_TEMPORARY;
                tgt[2].SrcReg[0].Index = tgt[1].DstReg.Index;

                if (comparefunc == GL_LESS || comparefunc == GL_GREATER) {
                        pass = 1;
                        fail = 2;
                } else {
                        pass = 2;
                        fail = 1;
                }

                tgt[2].SrcReg[pass].File = PROGRAM_BUILTIN;
                tgt[2].SrcReg[pass].Swizzle = SWIZZLE_1111;
                tgt[2].SrcReg[fail] = shadow_ambient(t->Program, inst.TexSrcUnit);
        } else if (destredirect) {
                tgt = radeonAppendInstructions(t->Program, 1);

                tgt->Opcode = OPCODE_MOV;
                tgt->DstReg = orig_inst->DstReg;
                tgt->SrcReg[0].File = PROGRAM_TEMPORARY;
                tgt->SrcReg[0].Index = inst.DstReg.Index;
        }

        return GL_TRUE;
}

GLboolean r500FPIsNativeSwizzle(GLuint opcode, struct prog_src_register reg)
{
        GLuint relevant;
        int i;

        if (opcode == OPCODE_TEX ||
            opcode == OPCODE_TXB ||
            opcode == OPCODE_TXP ||
            opcode == OPCODE_KIL) {
                if (reg.Abs)
                        return GL_FALSE;

                if (opcode == OPCODE_KIL && (reg.Swizzle != SWIZZLE_NOOP || reg.Negate != NEGATE_NONE))
                        return GL_FALSE;

                if (reg.Negate)
                        reg.Negate ^= NEGATE_XYZW;

                for(i = 0; i < 4; ++i) {
                        GLuint swz = GET_SWZ(reg.Swizzle, i);
                        if (swz == SWIZZLE_NIL) {
                                reg.Negate &= ~(1 << i);
                                continue;
                        }
                        if (swz >= 4)
                                return GL_FALSE;
                }

                if (reg.Negate)
                        return GL_FALSE;

                return GL_TRUE;
        } else if (opcode == OPCODE_DDX || opcode == OPCODE_DDY) {
                /* DDX/MDH and DDY/MDV explicitly ignore incoming swizzles;
                 * if it doesn't fit perfectly into a .xyzw case... */
                if (reg.Swizzle == SWIZZLE_NOOP && !reg.Abs && !reg.Negate)
                        return GL_TRUE;

                return GL_FALSE;
        } else {
                /* ALU instructions support almost everything */
                if (reg.Abs)
                        return GL_TRUE;

                relevant = 0;
                for(i = 0; i < 3; ++i) {
                        GLuint swz = GET_SWZ(reg.Swizzle, i);
                        if (swz != SWIZZLE_NIL && swz != SWIZZLE_ZERO)
                                relevant |= 1 << i;
                }
                if ((reg.Negate & relevant) && ((reg.Negate & relevant) != relevant))
                        return GL_FALSE;

                return GL_TRUE;
        }
}

/**
 * Implement a MOV with a potentially non-native swizzle.
 *
 * The only thing we *cannot* do in an ALU instruction is per-component
 * negation. Therefore, we split the MOV into two instructions when necessary.
 */
void r500FPBuildSwizzle(struct nqssadce_state *s, struct prog_dst_register dst, struct prog_src_register src)
{
        struct prog_instruction *inst;
        GLuint negatebase[2] = { 0, 0 };
        int i;

        for(i = 0; i < 4; ++i) {
                GLuint swz = GET_SWZ(src.Swizzle, i);
                if (swz == SWIZZLE_NIL)
                        continue;
                negatebase[GET_BIT(src.Negate, i)] |= 1 << i;
        }

        _mesa_insert_instructions(s->Program, s->IP, (negatebase[0] ? 1 : 0) + (negatebase[1] ? 1 : 0));
        inst = s->Program->Instructions + s->IP;

        for(i = 0; i <= 1; ++i) {
                if (!negatebase[i])
                        continue;

                inst->Opcode = OPCODE_MOV;
                inst->DstReg = dst;
                inst->DstReg.WriteMask = negatebase[i];
                inst->SrcReg[0] = src;
                inst->SrcReg[0].Negate = (i == 0) ? NEGATE_NONE : NEGATE_XYZW;
                inst++;
                s->IP++;
        }
}


static char *toswiz(int swiz_val) {
  switch(swiz_val) {
  case 0: return "R";
  case 1: return "G";
  case 2: return "B";
  case 3: return "A";
  case 4: return "0";
  case 5: return "1/2";
  case 6: return "1";
  case 7: return "U";
  }
  return NULL;
}

static char *toop(int op_val)
{
  char *str = NULL;
  switch (op_val) {
  case 0: str = "MAD"; break;
  case 1: str = "DP3"; break;
  case 2: str = "DP4"; break;
  case 3: str = "D2A"; break;
  case 4: str = "MIN"; break;
  case 5: str = "MAX"; break;
  case 6: str = "Reserved"; break;
  case 7: str = "CND"; break;
  case 8: str = "CMP"; break;
  case 9: str = "FRC"; break;
  case 10: str = "SOP"; break;
  case 11: str = "MDH"; break;
  case 12: str = "MDV"; break;
  }
  return str;
}

static char *to_alpha_op(int op_val)
{
  char *str = NULL;
  switch (op_val) {
  case 0: str = "MAD"; break;
  case 1: str = "DP"; break;
  case 2: str = "MIN"; break;
  case 3: str = "MAX"; break;
  case 4: str = "Reserved"; break;
  case 5: str = "CND"; break;
  case 6: str = "CMP"; break;
  case 7: str = "FRC"; break;
  case 8: str = "EX2"; break;
  case 9: str = "LN2"; break;
  case 10: str = "RCP"; break;
  case 11: str = "RSQ"; break;
  case 12: str = "SIN"; break;
  case 13: str = "COS"; break;
  case 14: str = "MDH"; break;
  case 15: str = "MDV"; break;
  }
  return str;
}

static char *to_mask(int val)
{
  char *str = NULL;
  switch(val) {
  case 0: str = "NONE"; break;
  case 1: str = "R"; break;
  case 2: str = "G"; break;
  case 3: str = "RG"; break;
  case 4: str = "B"; break;
  case 5: str = "RB"; break;
  case 6: str = "GB"; break;
  case 7: str = "RGB"; break;
  case 8: str = "A"; break;
  case 9: str = "AR"; break;
  case 10: str = "AG"; break;
  case 11: str = "ARG"; break;
  case 12: str = "AB"; break;
  case 13: str = "ARB"; break;
  case 14: str = "AGB"; break;
  case 15: str = "ARGB"; break;
  }
  return str;
}

static char *to_texop(int val)
{
  switch(val) {
  case 0: return "NOP";
  case 1: return "LD";
  case 2: return "TEXKILL";
  case 3: return "PROJ";
  case 4: return "LODBIAS";
  case 5: return "LOD";
  case 6: return "DXDY";
  }
  return NULL;
}

void r500FragmentProgramDump(struct rX00_fragment_program_code *c)
{
  struct r500_fragment_program_code *code = &c->code.r500;
  fprintf(stderr, "R500 Fragment Program:\n--------\n");

  int n;
  uint32_t inst;
  uint32_t inst0;
  char *str = NULL;

  if (code->const_nr) {
    fprintf(stderr, "--------\nConstants:\n");
    for (n = 0; n < code->const_nr; n++) {
      fprintf(stderr, "Constant %d: %i[%i]\n", n,
        code->constant[n].File, code->constant[n].Index);
    }
    fprintf(stderr, "--------\n");
  }

  for (n = 0; n < code->inst_end+1; n++) {
    inst0 = inst = code->inst[n].inst0;
    fprintf(stderr,"%d\t0:CMN_INST   0x%08x:", n, inst);
    switch(inst & 0x3) {
    case R500_INST_TYPE_ALU: str = "ALU"; break;
    case R500_INST_TYPE_OUT: str = "OUT"; break;
    case R500_INST_TYPE_FC: str = "FC"; break;
    case R500_INST_TYPE_TEX: str = "TEX"; break;
    };
    fprintf(stderr,"%s %s %s %s %s ", str,
            inst & R500_INST_TEX_SEM_WAIT ? "TEX_WAIT" : "",
            inst & R500_INST_LAST ? "LAST" : "",
            inst & R500_INST_NOP ? "NOP" : "",
            inst & R500_INST_ALU_WAIT ? "ALU WAIT" : "");
    fprintf(stderr,"wmask: %s omask: %s\n", to_mask((inst >> 11) & 0xf),
            to_mask((inst >> 15) & 0xf));

    switch(inst0 & 0x3) {
    case 0:
    case 1:
      fprintf(stderr,"\t1:RGB_ADDR   0x%08x:", code->inst[n].inst1);
      inst = code->inst[n].inst1;

      fprintf(stderr,"Addr0: %d%c, Addr1: %d%c, Addr2: %d%c, srcp:%d\n",
              inst & 0xff, (inst & (1<<8)) ? 'c' : 't',
              (inst >> 10) & 0xff, (inst & (1<<18)) ? 'c' : 't',
              (inst >> 20) & 0xff, (inst & (1<<28)) ? 'c' : 't',
              (inst >> 30));

      fprintf(stderr,"\t2:ALPHA_ADDR 0x%08x:", code->inst[n].inst2);
      inst = code->inst[n].inst2;
      fprintf(stderr,"Addr0: %d%c, Addr1: %d%c, Addr2: %d%c, srcp:%d\n",
              inst & 0xff, (inst & (1<<8)) ? 'c' : 't',
              (inst >> 10) & 0xff, (inst & (1<<18)) ? 'c' : 't',
              (inst >> 20) & 0xff, (inst & (1<<28)) ? 'c' : 't',
              (inst >> 30));
      fprintf(stderr,"\t3 RGB_INST:  0x%08x:", code->inst[n].inst3);
      inst = code->inst[n].inst3;
      fprintf(stderr,"rgb_A_src:%d %s/%s/%s %d rgb_B_src:%d %s/%s/%s %d\n",
              (inst) & 0x3, toswiz((inst >> 2) & 0x7), toswiz((inst >> 5) & 0x7), toswiz((inst >> 8) & 0x7),
              (inst >> 11) & 0x3,
              (inst >> 13) & 0x3, toswiz((inst >> 15) & 0x7), toswiz((inst >> 18) & 0x7), toswiz((inst >> 21) & 0x7),
              (inst >> 24) & 0x3);


      fprintf(stderr,"\t4 ALPHA_INST:0x%08x:", code->inst[n].inst4);
      inst = code->inst[n].inst4;
      fprintf(stderr,"%s dest:%d%s alp_A_src:%d %s %d alp_B_src:%d %s %d w:%d\n", to_alpha_op(inst & 0xf),
              (inst >> 4) & 0x7f, inst & (1<<11) ? "(rel)":"",
              (inst >> 12) & 0x3, toswiz((inst >> 14) & 0x7), (inst >> 17) & 0x3,
              (inst >> 19) & 0x3, toswiz((inst >> 21) & 0x7), (inst >> 24) & 0x3,
              (inst >> 31) & 0x1);

      fprintf(stderr,"\t5 RGBA_INST: 0x%08x:", code->inst[n].inst5);
      inst = code->inst[n].inst5;
      fprintf(stderr,"%s dest:%d%s rgb_C_src:%d %s/%s/%s %d alp_C_src:%d %s %d\n", toop(inst & 0xf),
              (inst >> 4) & 0x7f, inst & (1<<11) ? "(rel)":"",
              (inst >> 12) & 0x3, toswiz((inst >> 14) & 0x7), toswiz((inst >> 17) & 0x7), toswiz((inst >> 20) & 0x7),
              (inst >> 23) & 0x3,
              (inst >> 25) & 0x3, toswiz((inst >> 27) & 0x7), (inst >> 30) & 0x3);
      break;
    case 2:
      break;
    case 3:
      inst = code->inst[n].inst1;
      fprintf(stderr,"\t1:TEX_INST:  0x%08x: id: %d op:%s, %s, %s %s\n", inst, (inst >> 16) & 0xf,
              to_texop((inst >> 22) & 0x7), (inst & (1<<25)) ? "ACQ" : "",
              (inst & (1<<26)) ? "IGNUNC" : "", (inst & (1<<27)) ? "UNSCALED" : "SCALED");
      inst = code->inst[n].inst2;
      fprintf(stderr,"\t2:TEX_ADDR:  0x%08x: src: %d%s %s/%s/%s/%s dst: %d%s %s/%s/%s/%s\n", inst,
              inst & 127, inst & (1<<7) ? "(rel)" : "",
              toswiz((inst >> 8) & 0x3), toswiz((inst >> 10) & 0x3),
              toswiz((inst >> 12) & 0x3), toswiz((inst >> 14) & 0x3),
              (inst >> 16) & 127, inst & (1<<23) ? "(rel)" : "",
              toswiz((inst >> 24) & 0x3), toswiz((inst >> 26) & 0x3),
              toswiz((inst >> 28) & 0x3), toswiz((inst >> 30) & 0x3));

      fprintf(stderr,"\t3:TEX_DXDY:  0x%08x\n", code->inst[n].inst3);
      break;
    }
    fprintf(stderr,"\n");
  }

}