/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS 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 "util/u_debug.h"
#include "pipe/p_shader_tokens.h"
#include "tgsi_parse.h"
#include "util/u_memory.h"
unsigned
tgsi_parse_init(
struct tgsi_parse_context *ctx,
const struct tgsi_token *tokens )
{
ctx->FullHeader.Header = *(struct tgsi_header *) &tokens[0];
if( ctx->FullHeader.Header.HeaderSize >= 2 ) {
ctx->FullHeader.Processor = *(struct tgsi_processor *) &tokens[1];
}
else {
return TGSI_PARSE_ERROR;
}
ctx->Tokens = tokens;
ctx->Position = ctx->FullHeader.Header.HeaderSize;
return TGSI_PARSE_OK;
}
void
tgsi_parse_free(
struct tgsi_parse_context *ctx )
{
}
boolean
tgsi_parse_end_of_tokens(
struct tgsi_parse_context *ctx )
{
return ctx->Position >=
ctx->FullHeader.Header.HeaderSize + ctx->FullHeader.Header.BodySize;
}
/**
* This function is used to avoid and work-around type punning/aliasing
* warnings. The warnings seem harmless on x86 but on PPC they cause
* real failures.
*/
static INLINE void
copy_token(void *dst, const void *src)
{
memcpy(dst, src, 4);
}
/**
* Get next 4-byte token, return it at address specified by 'token'
*/
static void
next_token(
struct tgsi_parse_context *ctx,
void *token )
{
assert( !tgsi_parse_end_of_tokens( ctx ) );
copy_token(token, &ctx->Tokens[ctx->Position]);
ctx->Position++;
}
void
tgsi_parse_token(
struct tgsi_parse_context *ctx )
{
struct tgsi_token token;
unsigned i;
next_token( ctx, &token );
switch( token.Type ) {
case TGSI_TOKEN_TYPE_DECLARATION:
{
struct tgsi_full_declaration *decl = &ctx->FullToken.FullDeclaration;
memset(decl, 0, sizeof *decl);
copy_token(&decl->Declaration, &token);
next_token( ctx, &decl->Range );
if (decl->Declaration.Dimension) {
next_token(ctx, &decl->Dim);
}
if( decl->Declaration.Interpolate ) {
next_token( ctx, &decl->Interp );
}
if( decl->Declaration.Semantic ) {
next_token( ctx, &decl->Semantic );
}
if (decl->Declaration.File == TGSI_FILE_IMMEDIATE_ARRAY) {
unsigned i, j;
decl->ImmediateData.u = (union tgsi_immediate_data*)
&ctx->Tokens[ctx->Position];
for (i = 0; i <= decl->Range.Last; ++i) {
for (j = 0; j < 4; ++j) {
ctx->Position++;
}
}
}
if (decl->Declaration.File == TGSI_FILE_RESOURCE) {
next_token(ctx, &decl->Resource);
}
if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
next_token(ctx, &decl->SamplerView);
}
break;
}
case TGSI_TOKEN_TYPE_IMMEDIATE:
{
struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
uint imm_count;
memset(imm, 0, sizeof *imm);
copy_token(&imm->Immediate, &token);
imm_count = imm->Immediate.NrTokens - 1;
switch (imm->Immediate.DataType) {
case TGSI_IMM_FLOAT32:
for (i = 0; i < imm_count; i++) {
next_token(ctx, &imm->u[i].Float);
}
break;
case TGSI_IMM_UINT32:
for (i = 0; i < imm_count; i++) {
next_token(ctx, &imm->u[i].Uint);
}
break;
case TGSI_IMM_INT32:
for (i = 0; i < imm_count; i++) {
next_token(ctx, &imm->u[i].Int);
}
break;
default:
assert( 0 );
}
break;
}
case TGSI_TOKEN_TYPE_INSTRUCTION:
{
struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
memset(inst, 0, sizeof *inst);
copy_token(&inst->Instruction, &token);
if (inst->Instruction.Predicate) {
next_token(ctx, &inst->Predicate);
}
if (inst->Instruction.Label) {
next_token( ctx, &inst->Label);
}
if (inst->Instruction.Texture) {
next_token( ctx, &inst->Texture);
for( i = 0; i < inst->Texture.NumOffsets; i++ ) {
next_token( ctx, &inst->TexOffsets[i] );
}
}
assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
for( i = 0; i < inst->Instruction.NumDstRegs; i++ ) {
next_token( ctx, &inst->Dst[i].Register );
if( inst->Dst[i].Register.Indirect ) {
next_token( ctx, &inst->Dst[i].Indirect );
/*
* No support for indirect or multi-dimensional addressing.
*/
assert( !inst->Dst[i].Indirect.Dimension );
assert( !inst->Dst[i].Indirect.Indirect );
}
if( inst->Dst[i].Register.Dimension ) {
next_token( ctx, &inst->Dst[i].Dimension );
/*
* No support for multi-dimensional addressing.
*/
assert( !inst->Dst[i].Dimension.Dimension );
if( inst->Dst[i].Dimension.Indirect ) {
next_token( ctx, &inst->Dst[i].DimIndirect );
/*
* No support for indirect or multi-dimensional addressing.
*/
assert( !inst->Dst[i].Indirect.Indirect );
assert( !inst->Dst[i].Indirect.Dimension );
}
}
}
assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
for( i = 0; i < inst->Instruction.NumSrcRegs; i++ ) {
next_token( ctx, &inst->Src[i].Register );
if( inst->Src[i].Register.Indirect ) {
next_token( ctx, &inst->Src[i].Indirect );
/*
* No support for indirect or multi-dimensional addressing.
*/
assert( !inst->Src[i].Indirect.Indirect );
assert( !inst->Src[i].Indirect.Dimension );
}
if( inst->Src[i].Register.Dimension ) {
next_token( ctx, &inst->Src[i].Dimension );
/*
* No support for multi-dimensional addressing.
*/
assert( !inst->Src[i].Dimension.Dimension );
if( inst->Src[i].Dimension.Indirect ) {
next_token( ctx, &inst->Src[i].DimIndirect );
/*
* No support for indirect or multi-dimensional addressing.
*/
assert( !inst->Src[i].Indirect.Indirect );
assert( !inst->Src[i].Indirect.Dimension );
}
}
}
break;
}
case TGSI_TOKEN_TYPE_PROPERTY:
{
struct tgsi_full_property *prop = &ctx->FullToken.FullProperty;
uint prop_count;
memset(prop, 0, sizeof *prop);
copy_token(&prop->Property, &token);
prop_count = prop->Property.NrTokens - 1;
for (i = 0; i < prop_count; i++) {
next_token(ctx, &prop->u[i]);
}
break;
}
default:
assert( 0 );
}
}
/**
* Make a new copy of a token array.
*/
struct tgsi_token *
tgsi_dup_tokens(const struct tgsi_token *tokens)
{
unsigned n = tgsi_num_tokens(tokens);
unsigned bytes = n * sizeof(struct tgsi_token);
struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
if (new_tokens)
memcpy(new_tokens, tokens, bytes);
return new_tokens;
}
/**
* Allocate memory for num_tokens tokens.
*/
struct tgsi_token *
tgsi_alloc_tokens(unsigned num_tokens)
{
unsigned bytes = num_tokens * sizeof(struct tgsi_token);
return (struct tgsi_token *) MALLOC(bytes);
}
void
tgsi_dump_tokens(const struct tgsi_token *tokens)
{
const unsigned *dwords = (const unsigned *)tokens;
int nr = tgsi_num_tokens(tokens);
int i;
assert(sizeof(*tokens) == sizeof(unsigned));
debug_printf("const unsigned tokens[%d] = {\n", nr);
for (i = 0; i < nr; i++)
debug_printf("0x%08x,\n", dwords[i]);
debug_printf("};\n");
}