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      1 /*
      2  * Copyright (c) 2012-2015 Etnaviv Project
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sub license,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the
     12  * next paragraph) shall be included in all copies or substantial portions
     13  * of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     21  * DEALINGS IN THE SOFTWARE.
     22  *
     23  * Authors:
     24  *    Wladimir J. van der Laan <laanwj (at) gmail.com>
     25  */
     26 
     27 #ifndef H_ETNAVIV_COMPILER
     28 #define H_ETNAVIV_COMPILER
     29 
     30 #include "etnaviv_context.h"
     31 #include "etnaviv_internal.h"
     32 #include "pipe/p_compiler.h"
     33 #include "pipe/p_shader_tokens.h"
     34 
     35 /* XXX some of these are pretty arbitrary limits, may be better to switch
     36  * to dynamic allocation at some point.
     37  */
     38 #define ETNA_MAX_TEMPS (64) /* max temp register count of all Vivante hw */
     39 #define ETNA_MAX_TOKENS (2048)
     40 #define ETNA_MAX_IMM (1024) /* max const+imm in 32-bit words */
     41 #define ETNA_MAX_DECL (2048) /* max declarations */
     42 #define ETNA_MAX_DEPTH (32)
     43 #define ETNA_MAX_INSTRUCTIONS (2048)
     44 
     45 /* compiler output per input/output */
     46 struct etna_shader_inout {
     47    int reg; /* native register */
     48    struct tgsi_declaration_semantic semantic; /* tgsi semantic name and index */
     49    int num_components;
     50 };
     51 
     52 struct etna_shader_io_file {
     53    size_t num_reg;
     54    struct etna_shader_inout reg[ETNA_NUM_INPUTS];
     55 };
     56 
     57 /* shader object, for linking */
     58 struct etna_shader {
     59    uint processor; /* TGSI_PROCESSOR_... */
     60    uint32_t code_size; /* code size in uint32 words */
     61    uint32_t *code;
     62    unsigned num_temps;
     63 
     64    struct etna_shader_uniform_info uniforms;
     65 
     66    /* ETNA_DIRTY_* flags that, when set in context dirty, mean that the
     67     * uniforms have to get (partial) reloaded. */
     68    uint32_t uniforms_dirty_bits;
     69 
     70    /* inputs (for linking) for fs, the inputs must be in register 1..N */
     71    struct etna_shader_io_file infile;
     72 
     73    /* outputs (for linking) */
     74    struct etna_shader_io_file outfile;
     75 
     76    /* index into outputs (for linking) */
     77    int output_count_per_semantic[TGSI_SEMANTIC_COUNT];
     78    struct etna_shader_inout * *output_per_semantic_list; /* list of pointers to outputs */
     79    struct etna_shader_inout **output_per_semantic[TGSI_SEMANTIC_COUNT];
     80 
     81    /* special outputs (vs only) */
     82    int vs_pos_out_reg; /* VS position output */
     83    int vs_pointsize_out_reg; /* VS point size output */
     84    uint32_t vs_load_balancing;
     85 
     86    /* special outputs (ps only) */
     87    int ps_color_out_reg; /* color output register */
     88    int ps_depth_out_reg; /* depth output register */
     89 
     90    /* unknown input property (XX_INPUT_COUNT, field UNK8) */
     91    uint32_t input_count_unk8;
     92 };
     93 
     94 struct etna_varying {
     95    uint32_t pa_attributes;
     96    uint8_t num_components;
     97    uint8_t use[4];
     98    uint8_t reg;
     99 };
    100 
    101 struct etna_shader_link_info {
    102    /* each PS input is annotated with the VS output reg */
    103    unsigned num_varyings;
    104    struct etna_varying varyings[ETNA_NUM_INPUTS];
    105 };
    106 
    107 struct etna_shader *
    108 etna_compile_shader(const struct etna_specs *specs, const struct tgsi_token *tokens);
    109 
    110 void
    111 etna_dump_shader(const struct etna_shader *shader);
    112 
    113 bool
    114 etna_link_shader(struct etna_shader_link_info *info,
    115                  const struct etna_shader *vs, const struct etna_shader *fs);
    116 
    117 void
    118 etna_destroy_shader(struct etna_shader *shader);
    119 
    120 #endif
    121