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/*
* Copyright (c) 2012-2013 Etnaviv Project
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
/* Interface to shader compiler */
#ifndef H_ETNA_COMPILER
#define H_ETNA_COMPILER
#include "etna_internal.h"
#include <stdint.h>
#include "pipe/p_compiler.h"
#include "pipe/p_shader_tokens.h"
/* XXX some of these such as ETNA_MAX_LABELS are pretty arbitrary limits, may be better to switch
* to dynamic allocation at some point.
*/
#define ETNA_MAX_TEMPS (64) /* max temp register count of all Vivante hw */
#define ETNA_MAX_TOKENS (2048)
#define ETNA_MAX_IMM (1024) /* max const+imm in 32-bit words */
#define ETNA_MAX_DECL (2048) /* max declarations */
#define ETNA_MAX_DEPTH (32)
#define ETNA_MAX_LABELS (64)
#define ETNA_MAX_INSTRUCTIONS (2048)
struct etna_pipe_specs;
/* compiler output per input/output */
struct etna_shader_inout
{
int reg; /* native register */
struct tgsi_declaration_semantic semantic; /* tgsi semantic name and index */
int num_components;
/* varyings */
uint32_t pa_attributes; /* PA_SHADER_ATTRIBUTES */
};
/* shader object, for linking */
struct etna_shader_object
{
uint processor; /* TGSI_PROCESSOR_... */
uint32_t code_size; /* code size in uint32 words */
uint32_t *code;
unsigned num_temps;
uint32_t const_base; /* base of constants (in 32 bit units) */
uint32_t const_size; /* size of constants, also base of immediates (in 32 bit units) */
uint32_t imm_base; /* base of immediates (in 32 bit units) */
uint32_t imm_size; /* size of immediates (in 32 bit units) */
uint32_t *imm_data;
/* inputs (for linking)
* for fs, the inputs must be in register 1..N */
unsigned num_inputs;
struct etna_shader_inout inputs[ETNA_NUM_INPUTS];
/* outputs (for linking) */
unsigned num_outputs;
struct etna_shader_inout outputs[ETNA_NUM_INPUTS];
/* index into outputs (for linking) */
int output_count_per_semantic[TGSI_SEMANTIC_COUNT];
struct etna_shader_inout **output_per_semantic_list; /* list of pointers to outputs */
struct etna_shader_inout **output_per_semantic[TGSI_SEMANTIC_COUNT];
/* special outputs (vs only) */
int vs_pos_out_reg; /* VS position output */
int vs_pointsize_out_reg; /* VS point size output */
uint32_t vs_load_balancing;
/* special outputs (ps only) */
int ps_color_out_reg; /* color output register */
int ps_depth_out_reg; /* depth output register */
/* unknown input property (XX_INPUT_COUNT, field UNK8) */
uint32_t input_count_unk8;
};
struct etna_shader_link_info
{
/* each PS input is annotated with the VS output reg */
unsigned varyings_vs_reg[ETNA_NUM_INPUTS];
};
/* Entry point to compiler.
* Returns non-zero if compilation fails.
*/
int etna_compile_shader_object(const struct etna_pipe_specs *specs, const struct tgsi_token *tokens,
struct etna_shader_object **out);
/* Debug dump of shader object */
void etna_dump_shader_object(const struct etna_shader_object *sobj);
/* Link two shader objects together, annotates each PS input with the VS
* output register. Returns non-zero if the linking fails.
*/
int etna_link_shader_objects(struct etna_shader_link_info *info, const struct etna_shader_object *vs, const struct etna_shader_object *fs);
/* Destroy a previously allocated shader object */
void etna_destroy_shader_object(struct etna_shader_object *obj);
#endif
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