Esempio n. 1
0
/**
 * Generate assembly for a Vec4 IR instruction.
 *
 * \param instruction The Vec4 IR instruction to generate code for.
 * \param dst         The destination register.
 * \param src         An array of up to three source registers.
 */
void
vec4_generator::generate_vec4_instruction(vec4_instruction *instruction,
        struct brw_reg dst,
        struct brw_reg *src)
{
    vec4_instruction *inst = (vec4_instruction *) instruction;

    if (dst.width == BRW_WIDTH_4) {
        /* This happens in attribute fixups for "dual instanced" geometry
         * shaders, since they use attributes that are vec4's.  Since the exec
         * width is only 4, it's essential that the caller set
         * force_writemask_all in order to make sure the instruction is executed
         * regardless of which channels are enabled.
         */
        assert(inst->force_writemask_all);

        /* Fix up any <8;8,1> or <0;4,1> source registers to <4;4,1> to satisfy
         * the following register region restrictions (from Graphics BSpec:
         * 3D-Media-GPGPU Engine > EU Overview > Registers and Register Regions
         * > Register Region Restrictions)
         *
         *     1. ExecSize must be greater than or equal to Width.
         *
         *     2. If ExecSize = Width and HorzStride != 0, VertStride must be set
         *        to Width * HorzStride."
         */
        for (int i = 0; i < 3; i++) {
            if (src[i].file == BRW_GENERAL_REGISTER_FILE)
                src[i] = stride(src[i], 4, 4, 1);
        }
    }

    switch (inst->opcode) {
    case BRW_OPCODE_MOV:
        brw_MOV(p, dst, src[0]);
        break;
    case BRW_OPCODE_ADD:
        brw_ADD(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_MUL:
        brw_MUL(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_MACH:
        brw_set_acc_write_control(p, 1);
        brw_MACH(p, dst, src[0], src[1]);
        brw_set_acc_write_control(p, 0);
        break;

    case BRW_OPCODE_MAD:
        assert(brw->gen >= 6);
        brw_MAD(p, dst, src[0], src[1], src[2]);
        break;

    case BRW_OPCODE_FRC:
        brw_FRC(p, dst, src[0]);
        break;
    case BRW_OPCODE_RNDD:
        brw_RNDD(p, dst, src[0]);
        break;
    case BRW_OPCODE_RNDE:
        brw_RNDE(p, dst, src[0]);
        break;
    case BRW_OPCODE_RNDZ:
        brw_RNDZ(p, dst, src[0]);
        break;

    case BRW_OPCODE_AND:
        brw_AND(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_OR:
        brw_OR(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_XOR:
        brw_XOR(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_NOT:
        brw_NOT(p, dst, src[0]);
        break;
    case BRW_OPCODE_ASR:
        brw_ASR(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_SHR:
        brw_SHR(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_SHL:
        brw_SHL(p, dst, src[0], src[1]);
        break;

    case BRW_OPCODE_CMP:
        brw_CMP(p, dst, inst->conditional_mod, src[0], src[1]);
        break;
    case BRW_OPCODE_SEL:
        brw_SEL(p, dst, src[0], src[1]);
        break;

    case BRW_OPCODE_DPH:
        brw_DPH(p, dst, src[0], src[1]);
        break;

    case BRW_OPCODE_DP4:
        brw_DP4(p, dst, src[0], src[1]);
        break;

    case BRW_OPCODE_DP3:
        brw_DP3(p, dst, src[0], src[1]);
        break;

    case BRW_OPCODE_DP2:
        brw_DP2(p, dst, src[0], src[1]);
        break;

    case BRW_OPCODE_F32TO16:
        assert(brw->gen >= 7);
        brw_F32TO16(p, dst, src[0]);
        break;

    case BRW_OPCODE_F16TO32:
        assert(brw->gen >= 7);
        brw_F16TO32(p, dst, src[0]);
        break;

    case BRW_OPCODE_LRP:
        assert(brw->gen >= 6);
        brw_LRP(p, dst, src[0], src[1], src[2]);
        break;

    case BRW_OPCODE_BFREV:
        assert(brw->gen >= 7);
        /* BFREV only supports UD type for src and dst. */
        brw_BFREV(p, retype(dst, BRW_REGISTER_TYPE_UD),
                  retype(src[0], BRW_REGISTER_TYPE_UD));
        break;
    case BRW_OPCODE_FBH:
        assert(brw->gen >= 7);
        /* FBH only supports UD type for dst. */
        brw_FBH(p, retype(dst, BRW_REGISTER_TYPE_UD), src[0]);
        break;
    case BRW_OPCODE_FBL:
        assert(brw->gen >= 7);
        /* FBL only supports UD type for dst. */
        brw_FBL(p, retype(dst, BRW_REGISTER_TYPE_UD), src[0]);
        break;
    case BRW_OPCODE_CBIT:
        assert(brw->gen >= 7);
        /* CBIT only supports UD type for dst. */
        brw_CBIT(p, retype(dst, BRW_REGISTER_TYPE_UD), src[0]);
        break;
    case BRW_OPCODE_ADDC:
        assert(brw->gen >= 7);
        brw_set_acc_write_control(p, 1);
        brw_ADDC(p, dst, src[0], src[1]);
        brw_set_acc_write_control(p, 0);
        break;
    case BRW_OPCODE_SUBB:
        assert(brw->gen >= 7);
        brw_set_acc_write_control(p, 1);
        brw_SUBB(p, dst, src[0], src[1]);
        brw_set_acc_write_control(p, 0);
        break;

    case BRW_OPCODE_BFE:
        assert(brw->gen >= 7);
        brw_BFE(p, dst, src[0], src[1], src[2]);
        break;

    case BRW_OPCODE_BFI1:
        assert(brw->gen >= 7);
        brw_BFI1(p, dst, src[0], src[1]);
        break;
    case BRW_OPCODE_BFI2:
        assert(brw->gen >= 7);
        brw_BFI2(p, dst, src[0], src[1], src[2]);
        break;

    case BRW_OPCODE_IF:
        if (inst->src[0].file != BAD_FILE) {
            /* The instruction has an embedded compare (only allowed on gen6) */
            assert(brw->gen == 6);
            gen6_IF(p, inst->conditional_mod, src[0], src[1]);
        } else {
            struct brw_instruction *brw_inst = brw_IF(p, BRW_EXECUTE_8);
            brw_inst->header.predicate_control = inst->predicate;
        }
        break;

    case BRW_OPCODE_ELSE:
        brw_ELSE(p);
        break;
    case BRW_OPCODE_ENDIF:
        brw_ENDIF(p);
        break;

    case BRW_OPCODE_DO:
        brw_DO(p, BRW_EXECUTE_8);
        break;

    case BRW_OPCODE_BREAK:
        brw_BREAK(p);
        brw_set_predicate_control(p, BRW_PREDICATE_NONE);
        break;
    case BRW_OPCODE_CONTINUE:
        /* FINISHME: We need to write the loop instruction support still. */
        if (brw->gen >= 6)
            gen6_CONT(p);
        else
            brw_CONT(p);
        brw_set_predicate_control(p, BRW_PREDICATE_NONE);
        break;

    case BRW_OPCODE_WHILE:
        brw_WHILE(p);
        break;

    case SHADER_OPCODE_RCP:
    case SHADER_OPCODE_RSQ:
    case SHADER_OPCODE_SQRT:
    case SHADER_OPCODE_EXP2:
    case SHADER_OPCODE_LOG2:
    case SHADER_OPCODE_SIN:
    case SHADER_OPCODE_COS:
        if (brw->gen == 6) {
            generate_math1_gen6(inst, dst, src[0]);
        } else {
            /* Also works for Gen7. */
            generate_math1_gen4(inst, dst, src[0]);
        }
        break;

    case SHADER_OPCODE_POW:
    case SHADER_OPCODE_INT_QUOTIENT:
    case SHADER_OPCODE_INT_REMAINDER:
        if (brw->gen >= 7) {
            generate_math2_gen7(inst, dst, src[0], src[1]);
        } else if (brw->gen == 6) {
            generate_math2_gen6(inst, dst, src[0], src[1]);
        } else {
            generate_math2_gen4(inst, dst, src[0], src[1]);
        }
        break;

    case SHADER_OPCODE_TEX:
    case SHADER_OPCODE_TXD:
    case SHADER_OPCODE_TXF:
    case SHADER_OPCODE_TXF_CMS:
    case SHADER_OPCODE_TXF_MCS:
    case SHADER_OPCODE_TXL:
    case SHADER_OPCODE_TXS:
    case SHADER_OPCODE_TG4:
    case SHADER_OPCODE_TG4_OFFSET:
        generate_tex(inst, dst, src[0]);
        break;

    case VS_OPCODE_URB_WRITE:
        generate_vs_urb_write(inst);
        break;

    case SHADER_OPCODE_GEN4_SCRATCH_READ:
        generate_scratch_read(inst, dst, src[0]);
        break;

    case SHADER_OPCODE_GEN4_SCRATCH_WRITE:
        generate_scratch_write(inst, dst, src[0], src[1]);
        break;

    case VS_OPCODE_PULL_CONSTANT_LOAD:
        generate_pull_constant_load(inst, dst, src[0], src[1]);
        break;

    case VS_OPCODE_PULL_CONSTANT_LOAD_GEN7:
        generate_pull_constant_load_gen7(inst, dst, src[0], src[1]);
        break;

    case GS_OPCODE_URB_WRITE:
        generate_gs_urb_write(inst);
        break;

    case GS_OPCODE_THREAD_END:
        generate_gs_thread_end(inst);
        break;

    case GS_OPCODE_SET_WRITE_OFFSET:
        generate_gs_set_write_offset(dst, src[0], src[1]);
        break;

    case GS_OPCODE_SET_VERTEX_COUNT:
        generate_gs_set_vertex_count(dst, src[0]);
        break;

    case GS_OPCODE_SET_DWORD_2_IMMED:
        generate_gs_set_dword_2_immed(dst, src[0]);
        break;

    case GS_OPCODE_PREPARE_CHANNEL_MASKS:
        generate_gs_prepare_channel_masks(dst);
        break;

    case GS_OPCODE_SET_CHANNEL_MASKS:
        generate_gs_set_channel_masks(dst, src[0]);
        break;

    case GS_OPCODE_GET_INSTANCE_ID:
        generate_gs_get_instance_id(dst);
        break;

    case SHADER_OPCODE_SHADER_TIME_ADD:
        brw_shader_time_add(p, src[0],
                            prog_data->base.binding_table.shader_time_start);
        brw_mark_surface_used(&prog_data->base,
                              prog_data->base.binding_table.shader_time_start);
        break;

    case SHADER_OPCODE_UNTYPED_ATOMIC:
        generate_untyped_atomic(inst, dst, src[0], src[1]);
        break;

    case SHADER_OPCODE_UNTYPED_SURFACE_READ:
        generate_untyped_surface_read(inst, dst, src[0]);
        break;

    case VS_OPCODE_UNPACK_FLAGS_SIMD4X2:
        generate_unpack_flags(inst, dst);
        break;

    default:
        if (inst->opcode < (int) ARRAY_SIZE(opcode_descs)) {
            _mesa_problem(&brw->ctx, "Unsupported opcode in `%s' in vec4\n",
                          opcode_descs[inst->opcode].name);
        } else {
            _mesa_problem(&brw->ctx, "Unsupported opcode %d in vec4", inst->opcode);
        }
        abort();
    }
}
Esempio n. 2
0
void
vec4_generator::generate_vs_instruction(vec4_instruction *instruction,
                                        struct brw_reg dst,
                                        struct brw_reg *src)
{
   vec4_instruction *inst = (vec4_instruction *)instruction;

   switch (inst->opcode) {
   case SHADER_OPCODE_RCP:
   case SHADER_OPCODE_RSQ:
   case SHADER_OPCODE_SQRT:
   case SHADER_OPCODE_EXP2:
   case SHADER_OPCODE_LOG2:
   case SHADER_OPCODE_SIN:
   case SHADER_OPCODE_COS:
      if (intel->gen == 6) {
	 generate_math1_gen6(inst, dst, src[0]);
      } else {
	 /* Also works for Gen7. */
	 generate_math1_gen4(inst, dst, src[0]);
      }
      break;

   case SHADER_OPCODE_POW:
   case SHADER_OPCODE_INT_QUOTIENT:
   case SHADER_OPCODE_INT_REMAINDER:
      if (intel->gen >= 7) {
	 generate_math2_gen7(inst, dst, src[0], src[1]);
      } else if (intel->gen == 6) {
	 generate_math2_gen6(inst, dst, src[0], src[1]);
      } else {
	 generate_math2_gen4(inst, dst, src[0], src[1]);
      }
      break;

   case SHADER_OPCODE_TEX:
   case SHADER_OPCODE_TXD:
   case SHADER_OPCODE_TXF:
   case SHADER_OPCODE_TXL:
   case SHADER_OPCODE_TXS:
      generate_tex(inst, dst, src[0]);
      break;

   case VS_OPCODE_URB_WRITE:
      generate_urb_write(inst);
      break;

   case VS_OPCODE_SCRATCH_READ:
      generate_scratch_read(inst, dst, src[0]);
      break;

   case VS_OPCODE_SCRATCH_WRITE:
      generate_scratch_write(inst, dst, src[0], src[1]);
      break;

   case VS_OPCODE_PULL_CONSTANT_LOAD:
      generate_pull_constant_load(inst, dst, src[0], src[1]);
      break;

   default:
      if (inst->opcode < (int) ARRAY_SIZE(opcode_descs)) {
         _mesa_problem(ctx, "Unsupported opcode in `%s' in VS\n",
                       opcode_descs[inst->opcode].name);
      } else {
         _mesa_problem(ctx, "Unsupported opcode %d in VS", inst->opcode);
      }
      abort();
   }
}