/**
* Scan the given TGSI shader to collect information such as number of
* registers used, special instructions used, etc.
* \return info the result of the scan
*/
void
tgsi_scan_shader(const struct tgsi_token *tokens,
struct tgsi_shader_info *info)
{
uint procType, i;
struct tgsi_parse_context parse;
memset(info, 0, sizeof(*info));
for (i = 0; i < TGSI_FILE_COUNT; i++)
info->file_max[i] = -1;
/**
** Setup to begin parsing input shader
**/
if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n");
return;
}
procType = parse.FullHeader.Processor.Processor;
assert(procType == TGSI_PROCESSOR_FRAGMENT ||
procType == TGSI_PROCESSOR_VERTEX ||
procType == TGSI_PROCESSOR_GEOMETRY ||
procType == TGSI_PROCESSOR_COMPUTE);
info->processor = procType;
/**
** Loop over incoming program tokens/instructions
*/
while( !tgsi_parse_end_of_tokens( &parse ) ) {
info->num_tokens++;
tgsi_parse_token( &parse );
switch( parse.FullToken.Token.Type ) {
case TGSI_TOKEN_TYPE_INSTRUCTION:
{
const struct tgsi_full_instruction *fullinst
= &parse.FullToken.FullInstruction;
uint i;
assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
info->opcode_count[fullinst->Instruction.Opcode]++;
for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
const struct tgsi_full_src_register *src =
&fullinst->Src[i];
int ind = src->Register.Index;
/* Mark which inputs are effectively used */
if (src->Register.File == TGSI_FILE_INPUT) {
unsigned usage_mask;
usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i);
if (src->Register.Indirect) {
for (ind = 0; ind < info->num_inputs; ++ind) {
info->input_usage_mask[ind] |= usage_mask;
}
} else {
assert(ind >= 0);
assert(ind < PIPE_MAX_SHADER_INPUTS);
info->input_usage_mask[ind] |= usage_mask;
}
if (procType == TGSI_PROCESSOR_FRAGMENT &&
src->Register.File == TGSI_FILE_INPUT &&
info->reads_position &&
src->Register.Index == 0 &&
(src->Register.SwizzleX == TGSI_SWIZZLE_Z ||
src->Register.SwizzleY == TGSI_SWIZZLE_Z ||
src->Register.SwizzleZ == TGSI_SWIZZLE_Z ||
src->Register.SwizzleW == TGSI_SWIZZLE_Z)) {
info->reads_z = TRUE;
}
}
/* check for indirect register reads */
if (src->Register.Indirect) {
info->indirect_files |= (1 << src->Register.File);
}
}
/* check for indirect register writes */
for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) {
const struct tgsi_full_dst_register *dst = &fullinst->Dst[i];
if (dst->Register.Indirect) {
info->indirect_files |= (1 << dst->Register.File);
}
}
info->num_instructions++;
}
break;
case TGSI_TOKEN_TYPE_DECLARATION:
{
const struct tgsi_full_declaration *fulldecl
= &parse.FullToken.FullDeclaration;
const uint file = fulldecl->Declaration.File;
uint reg;
for (reg = fulldecl->Range.First;
reg <= fulldecl->Range.Last;
reg++) {
/* only first 32 regs will appear in this bitfield */
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
if (file == TGSI_FILE_INPUT) {
info->input_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
info->input_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate;
info->input_centroid[reg] = (ubyte)fulldecl->Interp.Centroid;
info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
info->num_inputs++;
if (procType == TGSI_PROCESSOR_FRAGMENT &&
fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
info->reads_position = TRUE;
}
else if (file == TGSI_FILE_SYSTEM_VALUE) {
unsigned index = fulldecl->Range.First;
unsigned semName = fulldecl->Semantic.Name;
info->system_value_semantic_name[index] = semName;
info->num_system_values = MAX2(info->num_system_values,
index + 1);
/*
info->system_value_semantic_name[info->num_system_values++] =
fulldecl->Semantic.Name;
*/
if (fulldecl->Semantic.Name == TGSI_SEMANTIC_INSTANCEID) {
info->uses_instanceid = TRUE;
}
else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_VERTEXID) {
info->uses_vertexid = TRUE;
} else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_PRIMID) {
info->uses_primid = TRUE;
}
}
else if (file == TGSI_FILE_OUTPUT) {
info->output_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
info->num_outputs++;
if ((procType == TGSI_PROCESSOR_VERTEX || procType == TGSI_PROCESSOR_GEOMETRY) &&
fulldecl->Semantic.Name == TGSI_SEMANTIC_CLIPDIST) {
info->num_written_clipdistance += util_bitcount(fulldecl->Declaration.UsageMask);
}
if ((procType == TGSI_PROCESSOR_VERTEX || procType == TGSI_PROCESSOR_GEOMETRY) &&
fulldecl->Semantic.Name == TGSI_SEMANTIC_CULLDIST) {
info->num_written_culldistance += util_bitcount(fulldecl->Declaration.UsageMask);
}
/* extra info for special outputs */
if (procType == TGSI_PROCESSOR_FRAGMENT &&
fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
info->writes_z = TRUE;
if (procType == TGSI_PROCESSOR_FRAGMENT &&
fulldecl->Semantic.Name == TGSI_SEMANTIC_STENCIL)
info->writes_stencil = TRUE;
if (procType == TGSI_PROCESSOR_VERTEX &&
fulldecl->Semantic.Name == TGSI_SEMANTIC_EDGEFLAG) {
info->writes_edgeflag = TRUE;
}
if (procType == TGSI_PROCESSOR_GEOMETRY &&
fulldecl->Semantic.Name ==
TGSI_SEMANTIC_VIEWPORT_INDEX) {
info->writes_viewport_index = TRUE;
}
if (procType == TGSI_PROCESSOR_GEOMETRY &&
fulldecl->Semantic.Name ==
TGSI_SEMANTIC_LAYER) {
info->writes_layer = TRUE;
}
}
}
}
break;
case TGSI_TOKEN_TYPE_IMMEDIATE:
{
uint reg = info->immediate_count++;
uint file = TGSI_FILE_IMMEDIATE;
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
}
break;
case TGSI_TOKEN_TYPE_PROPERTY:
{
const struct tgsi_full_property *fullprop
= &parse.FullToken.FullProperty;
info->properties[info->num_properties].name =
fullprop->Property.PropertyName;
memcpy(info->properties[info->num_properties].data,
fullprop->u, 8 * sizeof(unsigned));;
++info->num_properties;
}
break;
default:
assert( 0 );
}
}
info->uses_kill = (info->opcode_count[TGSI_OPCODE_KIL] ||
info->opcode_count[TGSI_OPCODE_KILP]);
/* extract simple properties */
for (i = 0; i < info->num_properties; ++i) {
switch (info->properties[i].name) {
case TGSI_PROPERTY_FS_COORD_ORIGIN:
info->origin_lower_left = info->properties[i].data[0];
break;
case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
info->pixel_center_integer = info->properties[i].data[0];
break;
case TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS:
info->color0_writes_all_cbufs = info->properties[i].data[0];
break;
case TGSI_PROPERTY_GS_INPUT_PRIM:
/* The dimensions of the IN decleration in geometry shader have
* to be deduced from the type of the input primitive.
*/
if (procType == TGSI_PROCESSOR_GEOMETRY) {
unsigned input_primitive = info->properties[i].data[0];
int num_verts = u_vertices_per_prim(input_primitive);
unsigned j;
info->file_count[TGSI_FILE_INPUT] = num_verts;
info->file_max[TGSI_FILE_INPUT] =
MAX2(info->file_max[TGSI_FILE_INPUT], num_verts - 1);
for (j = 0; j < num_verts; ++j) {
info->file_mask[TGSI_FILE_INPUT] |= (1 << j);
}
}
break;
default:
;
}
}
tgsi_parse_free (&parse);
}
/**
* Scan the given TGSI shader to collect information such as number of
* registers used, special instructions used, etc.
* \return info the result of the scan
*/
void
tgsi_scan_shader(const struct tgsi_token *tokens,
struct tgsi_shader_info *info)
{
uint procType, i;
struct tgsi_parse_context parse;
memset(info, 0, sizeof(*info));
for (i = 0; i < TGSI_FILE_COUNT; i++)
info->file_max[i] = -1;
for (i = 0; i < Elements(info->const_file_max); i++)
info->const_file_max[i] = -1;
/**
** Setup to begin parsing input shader
**/
if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n");
return;
}
procType = parse.FullHeader.Processor.Processor;
assert(procType == TGSI_PROCESSOR_FRAGMENT ||
procType == TGSI_PROCESSOR_VERTEX ||
procType == TGSI_PROCESSOR_GEOMETRY ||
procType == TGSI_PROCESSOR_COMPUTE);
info->processor = procType;
/**
** Loop over incoming program tokens/instructions
*/
while( !tgsi_parse_end_of_tokens( &parse ) ) {
info->num_tokens++;
tgsi_parse_token( &parse );
switch( parse.FullToken.Token.Type ) {
case TGSI_TOKEN_TYPE_INSTRUCTION:
{
const struct tgsi_full_instruction *fullinst
= &parse.FullToken.FullInstruction;
uint i;
assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
info->opcode_count[fullinst->Instruction.Opcode]++;
for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
const struct tgsi_full_src_register *src =
&fullinst->Src[i];
int ind = src->Register.Index;
/* Mark which inputs are effectively used */
if (src->Register.File == TGSI_FILE_INPUT) {
unsigned usage_mask;
usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i);
if (src->Register.Indirect) {
for (ind = 0; ind < info->num_inputs; ++ind) {
info->input_usage_mask[ind] |= usage_mask;
}
} else {
assert(ind >= 0);
assert(ind < PIPE_MAX_SHADER_INPUTS);
info->input_usage_mask[ind] |= usage_mask;
}
if (procType == TGSI_PROCESSOR_FRAGMENT &&
info->reads_position &&
src->Register.Index == 0 &&
(src->Register.SwizzleX == TGSI_SWIZZLE_Z ||
src->Register.SwizzleY == TGSI_SWIZZLE_Z ||
src->Register.SwizzleZ == TGSI_SWIZZLE_Z ||
src->Register.SwizzleW == TGSI_SWIZZLE_Z)) {
info->reads_z = TRUE;
}
}
/* check for indirect register reads */
if (src->Register.Indirect) {
info->indirect_files |= (1 << src->Register.File);
}
/* MSAA samplers */
if (src->Register.File == TGSI_FILE_SAMPLER) {
assert(fullinst->Instruction.Texture);
assert(src->Register.Index < Elements(info->is_msaa_sampler));
if (fullinst->Instruction.Texture &&
(fullinst->Texture.Texture == TGSI_TEXTURE_2D_MSAA ||
fullinst->Texture.Texture == TGSI_TEXTURE_2D_ARRAY_MSAA)) {
info->is_msaa_sampler[src->Register.Index] = TRUE;
}
}
}
/* check for indirect register writes */
for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) {
const struct tgsi_full_dst_register *dst = &fullinst->Dst[i];
if (dst->Register.Indirect) {
info->indirect_files |= (1 << dst->Register.File);
}
}
info->num_instructions++;
}
break;
case TGSI_TOKEN_TYPE_DECLARATION:
{
const struct tgsi_full_declaration *fulldecl
= &parse.FullToken.FullDeclaration;
const uint file = fulldecl->Declaration.File;
uint reg;
for (reg = fulldecl->Range.First;
reg <= fulldecl->Range.Last;
reg++) {
unsigned semName = fulldecl->Semantic.Name;
unsigned semIndex = fulldecl->Semantic.Index;
/* only first 32 regs will appear in this bitfield */
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
if (file == TGSI_FILE_CONSTANT) {
int buffer = 0;
if (fulldecl->Declaration.Dimension)
buffer = fulldecl->Dim.Index2D;
info->const_file_max[buffer] =
MAX2(info->const_file_max[buffer], (int)reg);
}
else if (file == TGSI_FILE_INPUT) {
info->input_semantic_name[reg] = (ubyte) semName;
info->input_semantic_index[reg] = (ubyte) semIndex;
info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate;
info->input_interpolate_loc[reg] = (ubyte)fulldecl->Interp.Location;
info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
info->num_inputs++;
if (semName == TGSI_SEMANTIC_PRIMID)
info->uses_primid = TRUE;
else if (procType == TGSI_PROCESSOR_FRAGMENT) {
if (semName == TGSI_SEMANTIC_POSITION)
info->reads_position = TRUE;
else if (semName == TGSI_SEMANTIC_FACE)
info->uses_frontface = TRUE;
}
}
else if (file == TGSI_FILE_SYSTEM_VALUE) {
unsigned index = fulldecl->Range.First;
info->system_value_semantic_name[index] = semName;
info->num_system_values = MAX2(info->num_system_values,
index + 1);
if (semName == TGSI_SEMANTIC_INSTANCEID) {
info->uses_instanceid = TRUE;
}
else if (semName == TGSI_SEMANTIC_VERTEXID) {
info->uses_vertexid = TRUE;
}
else if (semName == TGSI_SEMANTIC_PRIMID) {
info->uses_primid = TRUE;
}
}
else if (file == TGSI_FILE_OUTPUT) {
info->output_semantic_name[reg] = (ubyte) semName;
info->output_semantic_index[reg] = (ubyte) semIndex;
info->num_outputs++;
if (procType == TGSI_PROCESSOR_VERTEX ||
procType == TGSI_PROCESSOR_GEOMETRY) {
if (semName == TGSI_SEMANTIC_CLIPDIST) {
info->num_written_clipdistance +=
util_bitcount(fulldecl->Declaration.UsageMask);
}
else if (semName == TGSI_SEMANTIC_CULLDIST) {
info->num_written_culldistance +=
util_bitcount(fulldecl->Declaration.UsageMask);
}
}
if (procType == TGSI_PROCESSOR_FRAGMENT) {
if (semName == TGSI_SEMANTIC_POSITION) {
info->writes_z = TRUE;
}
else if (semName == TGSI_SEMANTIC_STENCIL) {
info->writes_stencil = TRUE;
}
}
if (procType == TGSI_PROCESSOR_VERTEX) {
if (semName == TGSI_SEMANTIC_EDGEFLAG) {
info->writes_edgeflag = TRUE;
}
}
if (procType == TGSI_PROCESSOR_GEOMETRY) {
if (semName == TGSI_SEMANTIC_VIEWPORT_INDEX) {
info->writes_viewport_index = TRUE;
}
else if (semName == TGSI_SEMANTIC_LAYER) {
info->writes_layer = TRUE;
}
}
}
}
}
break;
case TGSI_TOKEN_TYPE_IMMEDIATE:
{
uint reg = info->immediate_count++;
uint file = TGSI_FILE_IMMEDIATE;
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
}
break;
case TGSI_TOKEN_TYPE_PROPERTY:
{
const struct tgsi_full_property *fullprop
= &parse.FullToken.FullProperty;
unsigned name = fullprop->Property.PropertyName;
assert(name < Elements(info->properties));
info->properties[name] = fullprop->u[0].Data;
}
break;
default:
assert( 0 );
}
}
info->uses_kill = (info->opcode_count[TGSI_OPCODE_KILL_IF] ||
info->opcode_count[TGSI_OPCODE_KILL]);
/* The dimensions of the IN decleration in geometry shader have
* to be deduced from the type of the input primitive.
*/
if (procType == TGSI_PROCESSOR_GEOMETRY) {
unsigned input_primitive =
info->properties[TGSI_PROPERTY_GS_INPUT_PRIM];
int num_verts = u_vertices_per_prim(input_primitive);
int j;
info->file_count[TGSI_FILE_INPUT] = num_verts;
info->file_max[TGSI_FILE_INPUT] =
MAX2(info->file_max[TGSI_FILE_INPUT], num_verts - 1);
for (j = 0; j < num_verts; ++j) {
info->file_mask[TGSI_FILE_INPUT] |= (1 << j);
}
}
tgsi_parse_free (&parse);
}
static void
scan_instruction(struct tgsi_shader_info *info,
const struct tgsi_full_instruction *fullinst,
unsigned *current_depth)
{
unsigned i;
bool is_mem_inst = false;
assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
info->opcode_count[fullinst->Instruction.Opcode]++;
switch (fullinst->Instruction.Opcode) {
case TGSI_OPCODE_IF:
case TGSI_OPCODE_UIF:
case TGSI_OPCODE_BGNLOOP:
(*current_depth)++;
info->max_depth = MAX2(info->max_depth, *current_depth);
break;
case TGSI_OPCODE_ENDIF:
case TGSI_OPCODE_ENDLOOP:
(*current_depth)--;
break;
default:
break;
}
if (fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_CENTROID ||
fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
const struct tgsi_full_src_register *src0 = &fullinst->Src[0];
unsigned input;
if (src0->Register.Indirect && src0->Indirect.ArrayID)
input = info->input_array_first[src0->Indirect.ArrayID];
else
input = src0->Register.Index;
/* For the INTERP opcodes, the interpolation is always
* PERSPECTIVE unless LINEAR is specified.
*/
switch (info->input_interpolate[input]) {
case TGSI_INTERPOLATE_COLOR:
case TGSI_INTERPOLATE_CONSTANT:
case TGSI_INTERPOLATE_PERSPECTIVE:
switch (fullinst->Instruction.Opcode) {
case TGSI_OPCODE_INTERP_CENTROID:
info->uses_persp_opcode_interp_centroid = TRUE;
break;
case TGSI_OPCODE_INTERP_OFFSET:
info->uses_persp_opcode_interp_offset = TRUE;
break;
case TGSI_OPCODE_INTERP_SAMPLE:
info->uses_persp_opcode_interp_sample = TRUE;
break;
}
break;
case TGSI_INTERPOLATE_LINEAR:
switch (fullinst->Instruction.Opcode) {
case TGSI_OPCODE_INTERP_CENTROID:
info->uses_linear_opcode_interp_centroid = TRUE;
break;
case TGSI_OPCODE_INTERP_OFFSET:
info->uses_linear_opcode_interp_offset = TRUE;
break;
case TGSI_OPCODE_INTERP_SAMPLE:
info->uses_linear_opcode_interp_sample = TRUE;
break;
}
break;
}
}
if (fullinst->Instruction.Opcode >= TGSI_OPCODE_F2D &&
fullinst->Instruction.Opcode <= TGSI_OPCODE_DSSG)
info->uses_doubles = TRUE;
for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
const struct tgsi_full_src_register *src = &fullinst->Src[i];
int ind = src->Register.Index;
/* Mark which inputs are effectively used */
if (src->Register.File == TGSI_FILE_INPUT) {
unsigned usage_mask;
usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i);
if (src->Register.Indirect) {
for (ind = 0; ind < info->num_inputs; ++ind) {
info->input_usage_mask[ind] |= usage_mask;
}
} else {
assert(ind >= 0);
assert(ind < PIPE_MAX_SHADER_INPUTS);
info->input_usage_mask[ind] |= usage_mask;
}
if (info->processor == PIPE_SHADER_FRAGMENT &&
!src->Register.Indirect) {
unsigned name =
info->input_semantic_name[src->Register.Index];
unsigned index =
info->input_semantic_index[src->Register.Index];
if (name == TGSI_SEMANTIC_POSITION &&
(src->Register.SwizzleX == TGSI_SWIZZLE_Z ||
src->Register.SwizzleY == TGSI_SWIZZLE_Z ||
src->Register.SwizzleZ == TGSI_SWIZZLE_Z ||
src->Register.SwizzleW == TGSI_SWIZZLE_Z))
info->reads_z = TRUE;
if (name == TGSI_SEMANTIC_COLOR) {
unsigned mask =
(1 << src->Register.SwizzleX) |
(1 << src->Register.SwizzleY) |
(1 << src->Register.SwizzleZ) |
(1 << src->Register.SwizzleW);
info->colors_read |= mask << (index * 4);
}
}
}
/* check for indirect register reads */
if (src->Register.Indirect) {
info->indirect_files |= (1 << src->Register.File);
info->indirect_files_read |= (1 << src->Register.File);
}
/* Texture samplers */
if (src->Register.File == TGSI_FILE_SAMPLER) {
const unsigned index = src->Register.Index;
assert(fullinst->Instruction.Texture);
assert(index < ARRAY_SIZE(info->is_msaa_sampler));
assert(index < PIPE_MAX_SAMPLERS);
if (is_texture_inst(fullinst->Instruction.Opcode)) {
const unsigned target = fullinst->Texture.Texture;
assert(target < TGSI_TEXTURE_UNKNOWN);
/* for texture instructions, check that the texture instruction
* target matches the previous sampler view declaration (if there
* was one.)
*/
if (info->sampler_targets[index] == TGSI_TEXTURE_UNKNOWN) {
/* probably no sampler view declaration */
info->sampler_targets[index] = target;
} else {
/* Make sure the texture instruction's sampler/target info
* agrees with the sampler view declaration.
*/
assert(info->sampler_targets[index] == target);
}
/* MSAA samplers */
if (target == TGSI_TEXTURE_2D_MSAA ||
target == TGSI_TEXTURE_2D_ARRAY_MSAA) {
info->is_msaa_sampler[src->Register.Index] = TRUE;
}
}
}
if (is_memory_file(src->Register.File)) {
is_mem_inst = true;
if (tgsi_get_opcode_info(fullinst->Instruction.Opcode)->is_store) {
info->writes_memory = TRUE;
if (src->Register.File == TGSI_FILE_IMAGE &&
!src->Register.Indirect)
info->images_writemask |= 1 << src->Register.Index;
}
}
}
/* check for indirect register writes */
for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) {
const struct tgsi_full_dst_register *dst = &fullinst->Dst[i];
if (dst->Register.Indirect) {
info->indirect_files |= (1 << dst->Register.File);
info->indirect_files_written |= (1 << dst->Register.File);
}
if (is_memory_file(dst->Register.File)) {
assert(fullinst->Instruction.Opcode == TGSI_OPCODE_STORE);
is_mem_inst = true;
info->writes_memory = TRUE;
if (dst->Register.File == TGSI_FILE_IMAGE &&
!dst->Register.Indirect)
info->images_writemask |= 1 << dst->Register.Index;
}
}
if (is_mem_inst)
info->num_memory_instructions++;
info->num_instructions++;
}
/**
* Scan the given TGSI shader to collect information such as number of
* registers used, special instructions used, etc.
* \return info the result of the scan
*/
void
tgsi_scan_shader(const struct tgsi_token *tokens,
struct tgsi_shader_info *info)
{
uint procType, i;
struct tgsi_parse_context parse;
unsigned current_depth = 0;
memset(info, 0, sizeof(*info));
for (i = 0; i < TGSI_FILE_COUNT; i++)
info->file_max[i] = -1;
for (i = 0; i < Elements(info->const_file_max); i++)
info->const_file_max[i] = -1;
info->properties[TGSI_PROPERTY_GS_INVOCATIONS] = 1;
/**
** Setup to begin parsing input shader
**/
if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n");
return;
}
procType = parse.FullHeader.Processor.Processor;
assert(procType == TGSI_PROCESSOR_FRAGMENT ||
procType == TGSI_PROCESSOR_VERTEX ||
procType == TGSI_PROCESSOR_GEOMETRY ||
procType == TGSI_PROCESSOR_TESS_CTRL ||
procType == TGSI_PROCESSOR_TESS_EVAL ||
procType == TGSI_PROCESSOR_COMPUTE);
info->processor = procType;
/**
** Loop over incoming program tokens/instructions
*/
while( !tgsi_parse_end_of_tokens( &parse ) ) {
info->num_tokens++;
tgsi_parse_token( &parse );
switch( parse.FullToken.Token.Type ) {
case TGSI_TOKEN_TYPE_INSTRUCTION:
{
const struct tgsi_full_instruction *fullinst
= &parse.FullToken.FullInstruction;
uint i;
assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
info->opcode_count[fullinst->Instruction.Opcode]++;
switch (fullinst->Instruction.Opcode) {
case TGSI_OPCODE_IF:
case TGSI_OPCODE_UIF:
case TGSI_OPCODE_BGNLOOP:
current_depth++;
info->max_depth = MAX2(info->max_depth, current_depth);
break;
case TGSI_OPCODE_ENDIF:
case TGSI_OPCODE_ENDLOOP:
current_depth--;
break;
default:
break;
}
if (fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_CENTROID ||
fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
const struct tgsi_full_src_register *src0 = &fullinst->Src[0];
unsigned input;
if (src0->Register.Indirect && src0->Indirect.ArrayID)
input = info->input_array_first[src0->Indirect.ArrayID];
else
input = src0->Register.Index;
/* For the INTERP opcodes, the interpolation is always
* PERSPECTIVE unless LINEAR is specified.
*/
switch (info->input_interpolate[input]) {
case TGSI_INTERPOLATE_COLOR:
case TGSI_INTERPOLATE_CONSTANT:
case TGSI_INTERPOLATE_PERSPECTIVE:
switch (fullinst->Instruction.Opcode) {
case TGSI_OPCODE_INTERP_CENTROID:
info->uses_persp_opcode_interp_centroid = true;
break;
case TGSI_OPCODE_INTERP_OFFSET:
info->uses_persp_opcode_interp_offset = true;
break;
case TGSI_OPCODE_INTERP_SAMPLE:
info->uses_persp_opcode_interp_sample = true;
break;
}
break;
case TGSI_INTERPOLATE_LINEAR:
switch (fullinst->Instruction.Opcode) {
case TGSI_OPCODE_INTERP_CENTROID:
info->uses_linear_opcode_interp_centroid = true;
break;
case TGSI_OPCODE_INTERP_OFFSET:
info->uses_linear_opcode_interp_offset = true;
break;
case TGSI_OPCODE_INTERP_SAMPLE:
info->uses_linear_opcode_interp_sample = true;
break;
}
break;
}
}
if (fullinst->Instruction.Opcode >= TGSI_OPCODE_F2D &&
fullinst->Instruction.Opcode <= TGSI_OPCODE_DSSG)
info->uses_doubles = true;
for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
const struct tgsi_full_src_register *src =
&fullinst->Src[i];
int ind = src->Register.Index;
/* Mark which inputs are effectively used */
if (src->Register.File == TGSI_FILE_INPUT) {
unsigned usage_mask;
usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i);
if (src->Register.Indirect) {
for (ind = 0; ind < info->num_inputs; ++ind) {
info->input_usage_mask[ind] |= usage_mask;
}
} else {
assert(ind >= 0);
assert(ind < PIPE_MAX_SHADER_INPUTS);
info->input_usage_mask[ind] |= usage_mask;
}
if (procType == TGSI_PROCESSOR_FRAGMENT &&
!src->Register.Indirect) {
unsigned name =
info->input_semantic_name[src->Register.Index];
unsigned index =
info->input_semantic_index[src->Register.Index];
if (name == TGSI_SEMANTIC_POSITION &&
(src->Register.SwizzleX == TGSI_SWIZZLE_Z ||
src->Register.SwizzleY == TGSI_SWIZZLE_Z ||
src->Register.SwizzleZ == TGSI_SWIZZLE_Z ||
src->Register.SwizzleW == TGSI_SWIZZLE_Z))
info->reads_z = TRUE;
if (name == TGSI_SEMANTIC_COLOR) {
unsigned mask =
(1 << src->Register.SwizzleX) |
(1 << src->Register.SwizzleY) |
(1 << src->Register.SwizzleZ) |
(1 << src->Register.SwizzleW);
info->colors_read |= mask << (index * 4);
}
}
}
/* check for indirect register reads */
if (src->Register.Indirect) {
info->indirect_files |= (1 << src->Register.File);
info->indirect_files_read |= (1 << src->Register.File);
}
/* MSAA samplers */
if (src->Register.File == TGSI_FILE_SAMPLER) {
assert(fullinst->Instruction.Texture);
assert(src->Register.Index < Elements(info->is_msaa_sampler));
if (fullinst->Instruction.Texture &&
(fullinst->Texture.Texture == TGSI_TEXTURE_2D_MSAA ||
fullinst->Texture.Texture == TGSI_TEXTURE_2D_ARRAY_MSAA)) {
info->is_msaa_sampler[src->Register.Index] = TRUE;
}
}
}
/* check for indirect register writes */
for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) {
const struct tgsi_full_dst_register *dst = &fullinst->Dst[i];
if (dst->Register.Indirect) {
info->indirect_files |= (1 << dst->Register.File);
info->indirect_files_written |= (1 << dst->Register.File);
}
}
info->num_instructions++;
}
break;
case TGSI_TOKEN_TYPE_DECLARATION:
{
const struct tgsi_full_declaration *fulldecl
= &parse.FullToken.FullDeclaration;
const uint file = fulldecl->Declaration.File;
uint reg;
if (fulldecl->Declaration.Array) {
unsigned array_id = fulldecl->Array.ArrayID;
switch (file) {
case TGSI_FILE_INPUT:
assert(array_id < ARRAY_SIZE(info->input_array_first));
info->input_array_first[array_id] = fulldecl->Range.First;
info->input_array_last[array_id] = fulldecl->Range.Last;
break;
case TGSI_FILE_OUTPUT:
assert(array_id < ARRAY_SIZE(info->output_array_first));
info->output_array_first[array_id] = fulldecl->Range.First;
info->output_array_last[array_id] = fulldecl->Range.Last;
break;
}
info->array_max[file] = MAX2(info->array_max[file], array_id);
}
for (reg = fulldecl->Range.First;
reg <= fulldecl->Range.Last;
reg++) {
unsigned semName = fulldecl->Semantic.Name;
unsigned semIndex =
fulldecl->Semantic.Index + (reg - fulldecl->Range.First);
/* only first 32 regs will appear in this bitfield */
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
if (file == TGSI_FILE_CONSTANT) {
int buffer = 0;
if (fulldecl->Declaration.Dimension)
buffer = fulldecl->Dim.Index2D;
info->const_file_max[buffer] =
MAX2(info->const_file_max[buffer], (int)reg);
}
else if (file == TGSI_FILE_INPUT) {
info->input_semantic_name[reg] = (ubyte) semName;
info->input_semantic_index[reg] = (ubyte) semIndex;
info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate;
info->input_interpolate_loc[reg] = (ubyte)fulldecl->Interp.Location;
info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
info->num_inputs++;
/* Only interpolated varyings. Don't include POSITION.
* Don't include integer varyings, because they are not
* interpolated.
*/
if (semName == TGSI_SEMANTIC_GENERIC ||
semName == TGSI_SEMANTIC_TEXCOORD ||
semName == TGSI_SEMANTIC_COLOR ||
semName == TGSI_SEMANTIC_BCOLOR ||
semName == TGSI_SEMANTIC_FOG ||
semName == TGSI_SEMANTIC_CLIPDIST ||
semName == TGSI_SEMANTIC_CULLDIST) {
switch (fulldecl->Interp.Interpolate) {
case TGSI_INTERPOLATE_COLOR:
case TGSI_INTERPOLATE_PERSPECTIVE:
switch (fulldecl->Interp.Location) {
case TGSI_INTERPOLATE_LOC_CENTER:
info->uses_persp_center = true;
break;
case TGSI_INTERPOLATE_LOC_CENTROID:
info->uses_persp_centroid = true;
break;
case TGSI_INTERPOLATE_LOC_SAMPLE:
info->uses_persp_sample = true;
break;
}
break;
case TGSI_INTERPOLATE_LINEAR:
switch (fulldecl->Interp.Location) {
case TGSI_INTERPOLATE_LOC_CENTER:
info->uses_linear_center = true;
break;
case TGSI_INTERPOLATE_LOC_CENTROID:
info->uses_linear_centroid = true;
break;
case TGSI_INTERPOLATE_LOC_SAMPLE:
info->uses_linear_sample = true;
break;
}
break;
/* TGSI_INTERPOLATE_CONSTANT doesn't do any interpolation. */
}
}
if (semName == TGSI_SEMANTIC_PRIMID)
info->uses_primid = TRUE;
else if (procType == TGSI_PROCESSOR_FRAGMENT) {
if (semName == TGSI_SEMANTIC_POSITION)
info->reads_position = TRUE;
else if (semName == TGSI_SEMANTIC_FACE)
info->uses_frontface = TRUE;
}
}
else if (file == TGSI_FILE_SYSTEM_VALUE) {
unsigned index = fulldecl->Range.First;
info->system_value_semantic_name[index] = semName;
info->num_system_values = MAX2(info->num_system_values,
index + 1);
if (semName == TGSI_SEMANTIC_INSTANCEID) {
info->uses_instanceid = TRUE;
}
else if (semName == TGSI_SEMANTIC_VERTEXID) {
info->uses_vertexid = TRUE;
}
else if (semName == TGSI_SEMANTIC_VERTEXID_NOBASE) {
info->uses_vertexid_nobase = TRUE;
}
else if (semName == TGSI_SEMANTIC_BASEVERTEX) {
info->uses_basevertex = TRUE;
}
else if (semName == TGSI_SEMANTIC_PRIMID) {
info->uses_primid = TRUE;
} else if (semName == TGSI_SEMANTIC_INVOCATIONID) {
info->uses_invocationid = TRUE;
}
}
else if (file == TGSI_FILE_OUTPUT) {
info->output_semantic_name[reg] = (ubyte) semName;
info->output_semantic_index[reg] = (ubyte) semIndex;
info->num_outputs++;
if (semName == TGSI_SEMANTIC_COLOR)
info->colors_written |= 1 << semIndex;
if (procType == TGSI_PROCESSOR_VERTEX ||
procType == TGSI_PROCESSOR_GEOMETRY ||
procType == TGSI_PROCESSOR_TESS_CTRL ||
procType == TGSI_PROCESSOR_TESS_EVAL) {
if (semName == TGSI_SEMANTIC_VIEWPORT_INDEX) {
info->writes_viewport_index = TRUE;
}
else if (semName == TGSI_SEMANTIC_LAYER) {
info->writes_layer = TRUE;
}
else if (semName == TGSI_SEMANTIC_PSIZE) {
info->writes_psize = TRUE;
}
else if (semName == TGSI_SEMANTIC_CLIPVERTEX) {
info->writes_clipvertex = TRUE;
}
}
if (procType == TGSI_PROCESSOR_FRAGMENT) {
if (semName == TGSI_SEMANTIC_POSITION) {
info->writes_z = TRUE;
}
else if (semName == TGSI_SEMANTIC_STENCIL) {
info->writes_stencil = TRUE;
} else if (semName == TGSI_SEMANTIC_SAMPLEMASK) {
info->writes_samplemask = TRUE;
}
}
if (procType == TGSI_PROCESSOR_VERTEX) {
if (semName == TGSI_SEMANTIC_EDGEFLAG) {
info->writes_edgeflag = TRUE;
}
}
} else if (file == TGSI_FILE_SAMPLER) {
info->samplers_declared |= 1 << reg;
}
}
}
break;
case TGSI_TOKEN_TYPE_IMMEDIATE:
{
uint reg = info->immediate_count++;
uint file = TGSI_FILE_IMMEDIATE;
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
}
break;
case TGSI_TOKEN_TYPE_PROPERTY:
{
const struct tgsi_full_property *fullprop
= &parse.FullToken.FullProperty;
unsigned name = fullprop->Property.PropertyName;
unsigned value = fullprop->u[0].Data;
assert(name < Elements(info->properties));
info->properties[name] = value;
switch (name) {
case TGSI_PROPERTY_NUM_CLIPDIST_ENABLED:
info->num_written_clipdistance = value;
info->clipdist_writemask |= (1 << value) - 1;
break;
case TGSI_PROPERTY_NUM_CULLDIST_ENABLED:
info->num_written_culldistance = value;
info->culldist_writemask |= (1 << value) - 1;
break;
}
}
break;
default:
assert( 0 );
}
}
info->uses_kill = (info->opcode_count[TGSI_OPCODE_KILL_IF] ||
info->opcode_count[TGSI_OPCODE_KILL]);
/* The dimensions of the IN decleration in geometry shader have
* to be deduced from the type of the input primitive.
*/
if (procType == TGSI_PROCESSOR_GEOMETRY) {
unsigned input_primitive =
info->properties[TGSI_PROPERTY_GS_INPUT_PRIM];
int num_verts = u_vertices_per_prim(input_primitive);
int j;
info->file_count[TGSI_FILE_INPUT] = num_verts;
info->file_max[TGSI_FILE_INPUT] =
MAX2(info->file_max[TGSI_FILE_INPUT], num_verts - 1);
for (j = 0; j < num_verts; ++j) {
info->file_mask[TGSI_FILE_INPUT] |= (1 << j);
}
}
tgsi_parse_free (&parse);
}
