mesa: added gl_program::IndirectRegisterFiles field

Now drivers, etc. can know which register files are accessed with
indirect addressing.  Before we just checked gl_program::NumAddressRegs
but didn't know if that was the constant buffer, temp regs, or what.

The only user of this new field so far will be the gallium state tracker.

src/mesa/main/mtypes.h

@@ -1808,6 +1808,11 @@ struct gl_program
    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
    gl_texture_index SamplerTargets[MAX_SAMPLERS];
 
+   /** Bitmask of which register files are read/written with indirect
+    * addressing.  Mask of (1 << PROGRAM_x) bits.
+    */
+   GLbitfield IndirectRegisterFiles;
+
    /** Logical counts */
    /*@{*/
    GLuint NumInstructions;

src/mesa/program/arbprogparse.c

@@ -109,6 +109,7 @@ _mesa_parse_arb_fragment_program(GLcontext* ctx, GLenum target,
    program->Base.NumNativeTexIndirections = prog.NumTexIndirections;
    program->Base.InputsRead      = prog.InputsRead;
    program->Base.OutputsWritten  = prog.OutputsWritten;
+   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
    for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) {
       program->Base.TexturesUsed[i] = prog.TexturesUsed[i];
       if (prog.TexturesUsed[i])
@@ -199,6 +200,7 @@ _mesa_parse_arb_vertex_program(GLcontext *ctx, GLenum target,
    program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
    program->Base.InputsRead     = prog.InputsRead;
    program->Base.OutputsWritten = prog.OutputsWritten;
+   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
    program->IsPositionInvariant = (state.option.PositionInvariant)
       ? GL_TRUE : GL_FALSE;
 

src/mesa/program/nvvertparse.c

@@ -64,6 +64,7 @@ struct parse_state {
    GLbitfield inputsRead;
    GLbitfield outputsWritten;
    GLboolean anyProgRegsWritten;
+   GLboolean indirectRegisterFiles;
    GLuint numInst;                 /* number of instructions parsed */
 };
 
@@ -410,6 +411,7 @@ Parse_ParamReg(struct parse_state *parseState, struct prog_src_register *srcReg)
 
       srcReg->RelAddr = GL_TRUE;
       srcReg->File = PROGRAM_ENV_PARAM;
+      parseState->indirectRegisterFiles |= (1 << srcReg->File);
       /* Look for +/-N offset */
       if (!Peek_Token(parseState, token))
          RETURN_ERROR;
@@ -1308,6 +1310,7 @@ _mesa_parse_nv_vertex_program(GLcontext *ctx, GLenum dstTarget,
    parseState.inputsRead = 0;
    parseState.outputsWritten = 0;
    parseState.anyProgRegsWritten = GL_FALSE;
+   parseState.indirectRegisterFiles = 0x0;
 
    /* Reset error state */
    _mesa_set_program_error(ctx, -1, NULL);
@@ -1408,6 +1411,8 @@ _mesa_parse_nv_vertex_program(GLcontext *ctx, GLenum dstTarget,
       program->Base.Parameters = _mesa_new_parameter_list ();
       program->Base.NumParameters = 0;
 
+      program->Base.IndirectRegisterFiles = parseState.indirectRegisterFiles;
+
       state_tokens[0] = STATE_VERTEX_PROGRAM;
       state_tokens[1] = STATE_ENV;
       /* Add refs to all of the potential params, in order.  If we want to not

src/mesa/program/prog_print.c

@@ -924,6 +924,8 @@ _mesa_fprint_program_parameters(FILE *f,
    fprintf(f, "NumParameters=%d\n", prog->NumParameters);
    fprintf(f, "NumAttributes=%d\n", prog->NumAttributes);
    fprintf(f, "NumAddressRegs=%d\n", prog->NumAddressRegs);
+   fprintf(f, "IndirectRegisterFiles: 0x%x (0b%s)\n",
+           prog->IndirectRegisterFiles, binary(prog->IndirectRegisterFiles));
    fprintf(f, "SamplersUsed: 0x%x (0b%s)\n",
                  prog->SamplersUsed, binary(prog->SamplersUsed));
    fprintf(f, "Samplers=[ ");

src/mesa/program/program.c

@@ -512,6 +512,7 @@ _mesa_clone_program(GLcontext *ctx, const struct gl_program *prog)
    if (prog->Attributes)
       clone->Attributes = _mesa_clone_parameter_list(prog->Attributes);
    memcpy(clone->LocalParams, prog->LocalParams, sizeof(clone->LocalParams));
+   clone->IndirectRegisterFiles = prog->IndirectRegisterFiles;
    clone->NumInstructions = prog->NumInstructions;
    clone->NumTemporaries = prog->NumTemporaries;
    clone->NumParameters = prog->NumParameters;

src/mesa/program/program_parse.y

@@ -835,6 +835,7 @@ srcReg: USED_IDENTIFIER /* temporaryReg | progParamSingle */
 	   $$.Base.File = $1->param_binding_type;
 
 	   if ($3.Base.RelAddr) {
+              state->prog->IndirectRegisterFiles |= (1 << $$.Base.File);
 	      $1->param_accessed_indirectly = 1;
 
 	      $$.Base.RelAddr = 1;

src/mesa/slang/slang_link.c

@@ -756,6 +756,8 @@ _slang_update_inputs_outputs(struct gl_program *prog)
    prog->InputsRead = 0x0;
    prog->OutputsWritten = 0x0;
 
+   prog->IndirectRegisterFiles = 0x0;
+
    for (i = 0; i < prog->NumInstructions; i++) {
       const struct prog_instruction *inst = prog->Instructions + i;
       const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
@@ -774,6 +776,9 @@ _slang_update_inputs_outputs(struct gl_program *prog)
          else if (inst->SrcReg[j].File == PROGRAM_ADDRESS) {
             maxAddrReg = MAX2(maxAddrReg, (GLuint) (inst->SrcReg[j].Index + 1));
          }
+
+         if (inst->SrcReg[j].RelAddr)
+            prog->IndirectRegisterFiles |= (1 << inst->SrcReg[j].File);
       }
 
       if (inst->DstReg.File == PROGRAM_OUTPUT) {
@@ -784,6 +789,8 @@ _slang_update_inputs_outputs(struct gl_program *prog)
       else if (inst->DstReg.File == PROGRAM_ADDRESS) {
          maxAddrReg = MAX2(maxAddrReg, inst->DstReg.Index + 1);
       }
+      if (inst->DstReg.RelAddr)
+         prog->IndirectRegisterFiles |= (1 << inst->DstReg.File);
    }
    prog->NumAddressRegs = maxAddrReg;
 }