[mesa.git] / src / gallium / drivers / radeonsi / si_shader.h

/*
 * Copyright 2012 Advanced Micro Devices, Inc.
 * 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
 * on 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 AUTHOR(S) AND/OR THEIR 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.
 */

/* The compiler middle-end architecture: Explaining (non-)monolithic shaders
 * -------------------------------------------------------------------------
 *
 * Typically, there is one-to-one correspondence between API and HW shaders,
 * that is, for every API shader, there is exactly one shader binary in
 * the driver.
 *
 * The problem with that is that we also have to emulate some API states
 * (e.g. alpha-test, and many others) in shaders too. The two obvious ways
 * to deal with it are:
 * - each shader has multiple variants for each combination of emulated states,
 *   and the variants are compiled on demand, possibly relying on a shader
 *   cache for good performance
 * - patch shaders at the binary level
 *
 * This driver uses something completely different. The emulated states are
 * usually implemented at the beginning or end of shaders. Therefore, we can
 * split the shader into 3 parts:
 * - prolog part (shader code dependent on states)
 * - main part (the API shader)
 * - epilog part (shader code dependent on states)
 *
 * Each part is compiled as a separate shader and the final binaries are
 * concatenated. This type of shader is called non-monolithic, because it
 * consists of multiple independent binaries. Creating a new shader variant
 * is therefore only a concatenation of shader parts (binaries) and doesn't
 * involve any compilation. The main shader parts are the only parts that are
 * compiled when applications create shader objects. The prolog and epilog
 * parts are compiled on the first use and saved, so that their binaries can
 * be reused by many other shaders.
 *
 * One of the roles of the prolog part is to compute vertex buffer addresses
 * for vertex shaders. A few of the roles of the epilog part are color buffer
 * format conversions in pixel shaders that we have to do manually, and write
 * tessellation factors in tessellation control shaders. The prolog and epilog
 * have many other important responsibilities in various shader stages.
 * They don't just "emulate legacy stuff".
 *
 * Monolithic shaders are shaders where the parts are combined before LLVM
 * compilation, and the whole thing is compiled and optimized as one unit with
 * one binary on the output. The result is the same as the non-monolithic
 * shader, but the final code can be better, because LLVM can optimize across
 * all shader parts. Monolithic shaders aren't usually used except for these
 * special cases:
 *
 * 1) Some rarely-used states require modification of the main shader part
 *    itself, and in such cases, only the monolithic shader variant is
 *    compiled, and that's always done on the first use.
 *
 * 2) When we do cross-stage optimizations for separate shader objects and
 *    e.g. eliminate unused shader varyings, the resulting optimized shader
 *    variants are always compiled as monolithic shaders, and always
 *    asynchronously (i.e. not stalling ongoing rendering). We call them
 *    "optimized monolithic" shaders. The important property here is that
 *    the non-monolithic unoptimized shader variant is always available for use
 *    when the asynchronous compilation of the optimized shader is not done
 *    yet.
 *
 * Starting with GFX9 chips, some shader stages are merged, and the number of
 * shader parts per shader increased. The complete new list of shader parts is:
 * - 1st shader: prolog part
 * - 1st shader: main part
 * - 2nd shader: prolog part
 * - 2nd shader: main part
 * - 2nd shader: epilog part
 */

/* How linking shader inputs and outputs between vertex, tessellation, and
 * geometry shaders works.
 *
 * Inputs and outputs between shaders are stored in a buffer. This buffer
 * lives in LDS (typical case for tessellation), but it can also live
 * in memory (ESGS). Each input or output has a fixed location within a vertex.
 * The highest used input or output determines the stride between vertices.
 *
 * Since GS and tessellation are only possible in the OpenGL core profile,
 * only these semantics are valid for per-vertex data:
 *
 *   Name             Location
 *
 *   POSITION         0
 *   PSIZE            1
 *   CLIPDIST0..1     2..3
 *   CULLDIST0..1     (not implemented)
 *   GENERIC0..31     4..35
 *
 * For example, a shader only writing GENERIC0 has the output stride of 5.
 *
 * Only these semantics are valid for per-patch data:
 *
 *   Name             Location
 *
 *   TESSOUTER        0
 *   TESSINNER        1
 *   PATCH0..29       2..31
 *
 * That's how independent shaders agree on input and output locations.
 * The si_shader_io_get_unique_index function assigns the locations.
 *
 * For tessellation, other required information for calculating the input and
 * output addresses like the vertex stride, the patch stride, and the offsets
 * where per-vertex and per-patch data start, is passed to the shader via
 * user data SGPRs. The offsets and strides are calculated at draw time and
 * aren't available at compile time.
 */

#ifndef SI_SHADER_H
#define SI_SHADER_H

#include <llvm-c/Core.h> /* LLVMModuleRef */
#include <llvm-c/TargetMachine.h>
#include "tgsi/tgsi_scan.h"
#include "util/u_inlines.h"
#include "util/u_queue.h"

#include "ac_binary.h"
#include "ac_llvm_build.h"
#include "ac_llvm_util.h"

#include <stdio.h>

// Use LDS symbols when supported by LLVM. Can be disabled for testing the old
// path on newer LLVM for now. Should be removed in the long term.
#define USE_LDS_SYMBOLS (true)

struct nir_shader;
struct si_shader;
struct si_context;

#define SI_MAX_ATTRIBS          16
#define SI_MAX_VS_OUTPUTS       40

/* Shader IO unique indices are supported for TGSI_SEMANTIC_GENERIC with an
 * index smaller than this.
 */
#define SI_MAX_IO_GENERIC       32

/* SGPR user data indices */
enum {
        SI_SGPR_RW_BUFFERS,  /* rings (& stream-out, VS only) */
        SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES,
        SI_SGPR_CONST_AND_SHADER_BUFFERS, /* or just a constant buffer 0 pointer */
        SI_SGPR_SAMPLERS_AND_IMAGES,
        SI_NUM_RESOURCE_SGPRS,

        /* API VS, TES without GS, GS copy shader */
        SI_SGPR_VS_STATE_BITS = SI_NUM_RESOURCE_SGPRS,
        SI_NUM_VS_STATE_RESOURCE_SGPRS,

        /* all VS variants */
        SI_SGPR_BASE_VERTEX = SI_NUM_VS_STATE_RESOURCE_SGPRS,
        SI_SGPR_START_INSTANCE,
        SI_SGPR_DRAWID,
        SI_VS_NUM_USER_SGPR,

        SI_SGPR_VS_BLIT_DATA = SI_SGPR_CONST_AND_SHADER_BUFFERS,

        /* TES */
        SI_SGPR_TES_OFFCHIP_LAYOUT = SI_NUM_VS_STATE_RESOURCE_SGPRS,
        SI_SGPR_TES_OFFCHIP_ADDR,
        SI_TES_NUM_USER_SGPR,

        /* GFX6-8: TCS only */
        GFX6_SGPR_TCS_OFFCHIP_LAYOUT = SI_NUM_RESOURCE_SGPRS,
        GFX6_SGPR_TCS_OUT_OFFSETS,
        GFX6_SGPR_TCS_OUT_LAYOUT,
        GFX6_SGPR_TCS_IN_LAYOUT,
        GFX6_TCS_NUM_USER_SGPR,

        /* GFX9: Merged shaders. */
        /* 2ND_CONST_AND_SHADER_BUFFERS is set in USER_DATA_ADDR_LO (SGPR0). */
        /* 2ND_SAMPLERS_AND_IMAGES is set in USER_DATA_ADDR_HI (SGPR1). */
        GFX9_MERGED_NUM_USER_SGPR = SI_VS_NUM_USER_SGPR,

        /* GFX9: Merged LS-HS (VS-TCS) only. */
        GFX9_SGPR_TCS_OFFCHIP_LAYOUT = GFX9_MERGED_NUM_USER_SGPR,
        GFX9_SGPR_TCS_OUT_OFFSETS,
        GFX9_SGPR_TCS_OUT_LAYOUT,
        GFX9_TCS_NUM_USER_SGPR,

        /* GS limits */
        GFX6_GS_NUM_USER_SGPR = SI_NUM_RESOURCE_SGPRS,
        GFX9_VSGS_NUM_USER_SGPR = SI_VS_NUM_USER_SGPR,
        GFX9_TESGS_NUM_USER_SGPR = SI_TES_NUM_USER_SGPR,
        SI_GSCOPY_NUM_USER_SGPR = SI_NUM_VS_STATE_RESOURCE_SGPRS,

        /* PS only */
        SI_SGPR_ALPHA_REF       = SI_NUM_RESOURCE_SGPRS,
        SI_PS_NUM_USER_SGPR,
};

/* LLVM function parameter indices */
enum {
        SI_NUM_RESOURCE_PARAMS = 4,

        /* PS only parameters */
        SI_PARAM_ALPHA_REF = SI_NUM_RESOURCE_PARAMS,
        SI_PARAM_PRIM_MASK,
        SI_PARAM_PERSP_SAMPLE,
        SI_PARAM_PERSP_CENTER,
        SI_PARAM_PERSP_CENTROID,
        SI_PARAM_PERSP_PULL_MODEL,
        SI_PARAM_LINEAR_SAMPLE,
        SI_PARAM_LINEAR_CENTER,
        SI_PARAM_LINEAR_CENTROID,
        SI_PARAM_LINE_STIPPLE_TEX,
        SI_PARAM_POS_X_FLOAT,
        SI_PARAM_POS_Y_FLOAT,
        SI_PARAM_POS_Z_FLOAT,
        SI_PARAM_POS_W_FLOAT,
        SI_PARAM_FRONT_FACE,
        SI_PARAM_ANCILLARY,
        SI_PARAM_SAMPLE_COVERAGE,
        SI_PARAM_POS_FIXED_PT,

        SI_NUM_PARAMS = SI_PARAM_POS_FIXED_PT + 9, /* +8 for COLOR[0..1] */
};

/* Fields of driver-defined VS state SGPR. */
#define S_VS_STATE_CLAMP_VERTEX_COLOR(x)        (((unsigned)(x) & 0x1) << 0)
#define C_VS_STATE_CLAMP_VERTEX_COLOR           0xFFFFFFFE
#define S_VS_STATE_INDEXED(x)                   (((unsigned)(x) & 0x1) << 1)
#define C_VS_STATE_INDEXED                      0xFFFFFFFD
#define S_VS_STATE_OUTPRIM(x)                   (((unsigned)(x) & 0x3) << 2)
#define C_VS_STATE_OUTPRIM                      0xFFFFFFF3
#define S_VS_STATE_PROVOKING_VTX_INDEX(x)       (((unsigned)(x) & 0x3) << 4)
#define C_VS_STATE_PROVOKING_VTX_INDEX          0xFFFFFFCF
#define S_VS_STATE_STREAMOUT_QUERY_ENABLED(x)   (((unsigned)(x) & 0x1) << 6)
#define C_VS_STATE_STREAMOUT_QUERY_ENABLED      0xFFFFFFBF
#define S_VS_STATE_LS_OUT_PATCH_SIZE(x)         (((unsigned)(x) & 0x1FFF) << 8)
#define C_VS_STATE_LS_OUT_PATCH_SIZE            0xFFE000FF
#define S_VS_STATE_LS_OUT_VERTEX_SIZE(x)        (((unsigned)(x) & 0xFF) << 24)
#define C_VS_STATE_LS_OUT_VERTEX_SIZE           0x00FFFFFF

/* Driver-specific system values. */
enum {
        /* Values from set_tess_state. */
        TGSI_SEMANTIC_DEFAULT_TESSOUTER_SI = TGSI_SEMANTIC_COUNT,
        TGSI_SEMANTIC_DEFAULT_TESSINNER_SI,

        /* Up to 4 dwords in user SGPRs for compute shaders. */
        TGSI_SEMANTIC_CS_USER_DATA,
};

enum {
        /* Use a property enum that CS wouldn't use. */
        TGSI_PROPERTY_CS_LOCAL_SIZE = TGSI_PROPERTY_FS_COORD_ORIGIN,

        /* The number of used user data dwords in the range [1, 4]. */
        TGSI_PROPERTY_CS_USER_DATA_DWORDS = TGSI_PROPERTY_FS_COORD_PIXEL_CENTER,

        /* These represent the number of SGPRs the shader uses. */
        SI_VS_BLIT_SGPRS_POS = 3,
        SI_VS_BLIT_SGPRS_POS_COLOR = 7,
        SI_VS_BLIT_SGPRS_POS_TEXCOORD = 9,
};

/**
 * For VS shader keys, describe any fixups required for vertex fetch.
 *
 * \ref log_size, \ref format, and the number of channels are interpreted as
 * by \ref ac_build_opencoded_load_format.
 *
 * Note: all bits 0 (size = 1 byte, num channels = 1, format = float) is an
 * impossible format and indicates that no fixup is needed (just use
 * buffer_load_format_xyzw).
 */
union si_vs_fix_fetch {
        struct {
                uint8_t log_size : 2; /* 1, 2, 4, 8 or bytes per channel */
                uint8_t num_channels_m1 : 2; /* number of channels minus 1 */
                uint8_t format : 3; /* AC_FETCH_FORMAT_xxx */
                uint8_t reverse : 1; /* reverse XYZ channels */
        } u;
        uint8_t bits;
};

struct si_shader;

/* State of the context creating the shader object. */
struct si_compiler_ctx_state {
        /* Should only be used by si_init_shader_selector_async and
         * si_build_shader_variant if thread_index == -1 (non-threaded). */
        struct ac_llvm_compiler         *compiler;

        /* Used if thread_index == -1 or if debug.async is true. */
        struct pipe_debug_callback      debug;

        /* Used for creating the log string for gallium/ddebug. */
        bool                            is_debug_context;
};

/* A shader selector is a gallium CSO and contains shader variants and
 * binaries for one TGSI program. This can be shared by multiple contexts.
 */
struct si_shader_selector {
        struct pipe_reference   reference;
        struct si_screen        *screen;
        struct util_queue_fence ready;
        struct si_compiler_ctx_state compiler_ctx_state;

        mtx_t           mutex;
        struct si_shader        *first_variant; /* immutable after the first variant */
        struct si_shader        *last_variant; /* mutable */

        /* The compiled TGSI shader expecting a prolog and/or epilog (not
         * uploaded to a buffer).
         */
        struct si_shader        *main_shader_part;
        struct si_shader        *main_shader_part_ls; /* as_ls is set in the key */
        struct si_shader        *main_shader_part_es; /* as_es is set in the key */
        struct si_shader        *main_shader_part_ngg; /* as_ngg is set in the key */
        struct si_shader        *main_shader_part_ngg_es; /* for Wave32 TES before legacy GS */

        struct si_shader        *gs_copy_shader;

        struct tgsi_token       *tokens;
        struct nir_shader       *nir;
        struct pipe_stream_output_info  so;
        struct tgsi_shader_info         info;
        struct tgsi_tessctrl_info       tcs_info;

        /* PIPE_SHADER_[VERTEX|FRAGMENT|...] */
        enum pipe_shader_type type;
        bool            vs_needs_prolog;
        bool            force_correct_derivs_after_kill;
        bool            prim_discard_cs_allowed;
        bool            ngg_writes_edgeflag;
        bool            pos_writes_edgeflag;
        unsigned        pa_cl_vs_out_cntl;
        ubyte           clipdist_mask;
        ubyte           culldist_mask;
        unsigned        rast_prim;

        /* ES parameters. */
        unsigned        esgs_itemsize; /* vertex stride */
        unsigned        lshs_vertex_stride;

        /* GS parameters. */
        unsigned        gs_input_verts_per_prim;
        unsigned        gs_output_prim;
        unsigned        gs_max_out_vertices;
        unsigned        gs_num_invocations;
        unsigned        max_gs_stream; /* count - 1 */
        unsigned        gsvs_vertex_size;
        unsigned        max_gsvs_emit_size;
        unsigned        enabled_streamout_buffer_mask;
        bool            tess_turns_off_ngg;

        /* PS parameters. */
        unsigned        color_attr_index[2];
        unsigned        db_shader_control;
        /* Set 0xf or 0x0 (4 bits) per each written output.
         * ANDed with spi_shader_col_format.
         */
        unsigned        colors_written_4bit;

        uint64_t        outputs_written_before_ps; /* "get_unique_index" bits */
        uint64_t        outputs_written;        /* "get_unique_index" bits */
        uint32_t        patch_outputs_written;  /* "get_unique_index_patch" bits */

        uint64_t        inputs_read;            /* "get_unique_index" bits */

        /* bitmasks of used descriptor slots */
        uint32_t        active_const_and_shader_buffers;
        uint64_t        active_samplers_and_images;
};

/* Valid shader configurations:
 *
 * API shaders           VS | TCS | TES | GS |pass| PS
 * are compiled as:         |     |     |    |thru|
 *                          |     |     |    |    |
 * Only VS & PS:         VS |     |     |    |    | PS
 * GFX6     - with GS:   ES |     |     | GS | VS | PS
 *          - with tess: LS | HS  | VS  |    |    | PS
 *          - with both: LS | HS  | ES  | GS | VS | PS
 * GFX9     - with GS:   -> |     |     | GS | VS | PS
 *          - with tess: -> | HS  | VS  |    |    | PS
 *          - with both: -> | HS  | ->  | GS | VS | PS
 *                          |     |     |    |    |
 * NGG      - VS & PS:   GS |     |     |    |    | PS
 * (GFX10+) - with GS:   -> |     |     | GS |    | PS
 *          - with tess: -> | HS  | GS  |    |    | PS
 *          - with both: -> | HS  | ->  | GS |    | PS
 *
 * -> = merged with the next stage
 */

/* Use the byte alignment for all following structure members for optimal
 * shader key memory footprint.
 */
#pragma pack(push, 1)

/* Common VS bits between the shader key and the prolog key. */
struct si_vs_prolog_bits {
        /* - If neither "is_one" nor "is_fetched" has a bit set, the instance
         *   divisor is 0.
         * - If "is_one" has a bit set, the instance divisor is 1.
         * - If "is_fetched" has a bit set, the instance divisor will be loaded
         *   from the constant buffer.
         */
        uint16_t        instance_divisor_is_one;     /* bitmask of inputs */
        uint16_t        instance_divisor_is_fetched; /* bitmask of inputs */
        unsigned        ls_vgpr_fix:1;
        unsigned        unpack_instance_id_from_vertex_id:1;
};

/* Common TCS bits between the shader key and the epilog key. */
struct si_tcs_epilog_bits {
        unsigned        prim_mode:3;
        unsigned        invoc0_tess_factors_are_def:1;
        unsigned        tes_reads_tess_factors:1;
};

struct si_gs_prolog_bits {
        unsigned        tri_strip_adj_fix:1;
        unsigned        gfx9_prev_is_vs:1;
};

/* Common PS bits between the shader key and the prolog key. */
struct si_ps_prolog_bits {
        unsigned        color_two_side:1;
        unsigned        flatshade_colors:1;
        unsigned        poly_stipple:1;
        unsigned        force_persp_sample_interp:1;
        unsigned        force_linear_sample_interp:1;
        unsigned        force_persp_center_interp:1;
        unsigned        force_linear_center_interp:1;
        unsigned        bc_optimize_for_persp:1;
        unsigned        bc_optimize_for_linear:1;
        unsigned        samplemask_log_ps_iter:3;
};

/* Common PS bits between the shader key and the epilog key. */
struct si_ps_epilog_bits {
        unsigned        spi_shader_col_format;
        unsigned        color_is_int8:8;
        unsigned        color_is_int10:8;
        unsigned        last_cbuf:3;
        unsigned        alpha_func:3;
        unsigned        alpha_to_one:1;
        unsigned        poly_line_smoothing:1;
        unsigned        clamp_color:1;
};

union si_shader_part_key {
        struct {
                struct si_vs_prolog_bits states;
                unsigned        num_input_sgprs:6;
                /* For merged stages such as LS-HS, HS input VGPRs are first. */
                unsigned        num_merged_next_stage_vgprs:3;
                unsigned        last_input:4;
                unsigned        as_ls:1;
                unsigned        as_es:1;
                unsigned        as_ngg:1;
                /* Prologs for monolithic shaders shouldn't set EXEC. */
                unsigned        is_monolithic:1;
        } vs_prolog;
        struct {
                struct si_tcs_epilog_bits states;
        } tcs_epilog;
        struct {
                struct si_gs_prolog_bits states;
                /* Prologs of monolithic shaders shouldn't set EXEC. */
                unsigned        is_monolithic:1;
                unsigned        as_ngg:1;
        } gs_prolog;
        struct {
                struct si_ps_prolog_bits states;
                unsigned        num_input_sgprs:6;
                unsigned        num_input_vgprs:5;
                /* Color interpolation and two-side color selection. */
                unsigned        colors_read:8; /* color input components read */
                unsigned        num_interp_inputs:5; /* BCOLOR is at this location */
                unsigned        face_vgpr_index:5;
                unsigned        ancillary_vgpr_index:5;
                unsigned        wqm:1;
                char            color_attr_index[2];
                signed char     color_interp_vgpr_index[2]; /* -1 == constant */
        } ps_prolog;
        struct {
                struct si_ps_epilog_bits states;
                unsigned        colors_written:8;
                unsigned        writes_z:1;
                unsigned        writes_stencil:1;
                unsigned        writes_samplemask:1;
        } ps_epilog;
};

struct si_shader_key {
        /* Prolog and epilog flags. */
        union {
                struct {
                        struct si_vs_prolog_bits prolog;
                } vs;
                struct {
                        struct si_vs_prolog_bits ls_prolog; /* for merged LS-HS */
                        struct si_shader_selector *ls;   /* for merged LS-HS */
                        struct si_tcs_epilog_bits epilog;
                } tcs; /* tessellation control shader */
                struct {
                        struct si_vs_prolog_bits vs_prolog; /* for merged ES-GS */
                        struct si_shader_selector *es;   /* for merged ES-GS */
                        struct si_gs_prolog_bits prolog;
                } gs;
                struct {
                        struct si_ps_prolog_bits prolog;
                        struct si_ps_epilog_bits epilog;
                } ps;
        } part;

        /* These three are initially set according to the NEXT_SHADER property,
         * or guessed if the property doesn't seem correct.
         */
        unsigned as_es:1; /* export shader, which precedes GS */
        unsigned as_ls:1; /* local shader, which precedes TCS */
        unsigned as_ngg:1; /* VS, TES, or GS compiled as NGG primitive shader */

        /* Flags for monolithic compilation only. */
        struct {
                /* Whether fetch should be opencoded according to vs_fix_fetch.
                 * Otherwise, if vs_fix_fetch is non-zero, buffer_load_format_xyzw
                 * with minimal fixups is used. */
                uint16_t vs_fetch_opencode;
                union si_vs_fix_fetch vs_fix_fetch[SI_MAX_ATTRIBS];

                union {
                        uint64_t        ff_tcs_inputs_to_copy; /* for fixed-func TCS */
                        /* When PS needs PrimID and GS is disabled. */
                        unsigned        vs_export_prim_id:1;
                        struct {
                                unsigned interpolate_at_sample_force_center:1;
                                unsigned fbfetch_msaa:1;
                                unsigned fbfetch_is_1D:1;
                                unsigned fbfetch_layered:1;
                        } ps;
                } u;
        } mono;

        /* Optimization flags for asynchronous compilation only. */
        struct {
                /* For HW VS (it can be VS, TES, GS) */
                uint64_t        kill_outputs; /* "get_unique_index" bits */
                unsigned        clip_disable:1;

                /* For shaders where monolithic variants have better code.
                 *
                 * This is a flag that has no effect on code generation,
                 * but forces monolithic shaders to be used as soon as
                 * possible, because it's in the "opt" group.
                 */
                unsigned        prefer_mono:1;

                /* Primitive discard compute shader. */
                unsigned        vs_as_prim_discard_cs:1;
                unsigned        cs_prim_type:4;
                unsigned        cs_indexed:1;
                unsigned        cs_instancing:1;
                unsigned        cs_primitive_restart:1;
                unsigned        cs_provoking_vertex_first:1;
                unsigned        cs_need_correct_orientation:1;
                unsigned        cs_cull_front:1;
                unsigned        cs_cull_back:1;
                unsigned        cs_cull_z:1;
                unsigned        cs_halfz_clip_space:1;
        } opt;
};

/* Restore the pack alignment to default. */
#pragma pack(pop)

/* GCN-specific shader info. */
struct si_shader_info {
        ubyte                   vs_output_param_offset[SI_MAX_VS_OUTPUTS];
        ubyte                   num_input_sgprs;
        ubyte                   num_input_vgprs;
        signed char             face_vgpr_index;
        signed char             ancillary_vgpr_index;
        bool                    uses_instanceid;
        ubyte                   nr_pos_exports;
        ubyte                   nr_param_exports;
        unsigned                private_mem_vgprs;
        unsigned                max_simd_waves;
};

struct si_shader_binary {
        const char *elf_buffer;
        size_t elf_size;

        char *llvm_ir_string;
};

struct gfx9_gs_info {
        unsigned es_verts_per_subgroup;
        unsigned gs_prims_per_subgroup;
        unsigned gs_inst_prims_in_subgroup;
        unsigned max_prims_per_subgroup;
        unsigned esgs_ring_size; /* in bytes */
};

struct si_shader {
        struct si_compiler_ctx_state    compiler_ctx_state;

        struct si_shader_selector       *selector;
        struct si_shader_selector       *previous_stage_sel; /* for refcounting */
        struct si_shader                *next_variant;

        struct si_shader_part           *prolog;
        struct si_shader                *previous_stage; /* for GFX9 */
        struct si_shader_part           *prolog2;
        struct si_shader_part           *epilog;

        struct si_pm4_state             *pm4;
        struct si_resource              *bo;
        struct si_resource              *scratch_bo;
        struct si_shader_key            key;
        struct util_queue_fence         ready;
        bool                            compilation_failed;
        bool                            is_monolithic;
        bool                            is_optimized;
        bool                            is_binary_shared;
        bool                            is_gs_copy_shader;

        /* The following data is all that's needed for binary shaders. */
        struct si_shader_binary         binary;
        struct ac_shader_config         config;
        struct si_shader_info           info;

        struct {
                uint16_t ngg_emit_size; /* in dwords */
                uint16_t hw_max_esverts;
                uint16_t max_gsprims;
                uint16_t max_out_verts;
                uint16_t prim_amp_factor;
                bool max_vert_out_per_gs_instance;
        } ngg;

        /* Shader key + LLVM IR + disassembly + statistics.
         * Generated for debug contexts only.
         */
        char                            *shader_log;
        size_t                          shader_log_size;

        struct gfx9_gs_info gs_info;

        /* For save precompute context registers values. */
        union {
                struct {
                        unsigned        vgt_gsvs_ring_offset_1;
                        unsigned        vgt_gsvs_ring_offset_2;
                        unsigned        vgt_gsvs_ring_offset_3;
                        unsigned        vgt_gsvs_ring_itemsize;
                        unsigned        vgt_gs_max_vert_out;
                        unsigned        vgt_gs_vert_itemsize;
                        unsigned        vgt_gs_vert_itemsize_1;
                        unsigned        vgt_gs_vert_itemsize_2;
                        unsigned        vgt_gs_vert_itemsize_3;
                        unsigned        vgt_gs_instance_cnt;
                        unsigned        vgt_gs_onchip_cntl;
                        unsigned        vgt_gs_max_prims_per_subgroup;
                        unsigned        vgt_esgs_ring_itemsize;
                } gs;

                struct {
                        unsigned        ge_max_output_per_subgroup;
                        unsigned        ge_ngg_subgrp_cntl;
                        unsigned        vgt_primitiveid_en;
                        unsigned        vgt_gs_onchip_cntl;
                        unsigned        vgt_gs_instance_cnt;
                        unsigned        vgt_esgs_ring_itemsize;
                        unsigned        spi_vs_out_config;
                        unsigned        spi_shader_idx_format;
                        unsigned        spi_shader_pos_format;
                        unsigned        pa_cl_vte_cntl;
                        unsigned        pa_cl_ngg_cntl;
                        unsigned        vgt_gs_max_vert_out; /* for API GS */
                } ngg;

                struct {
                        unsigned        vgt_gs_mode;
                        unsigned        vgt_primitiveid_en;
                        unsigned        vgt_reuse_off;
                        unsigned        spi_vs_out_config;
                        unsigned        spi_shader_pos_format;
                        unsigned        pa_cl_vte_cntl;
                } vs;

                struct {
                        unsigned        spi_ps_input_ena;
                        unsigned        spi_ps_input_addr;
                        unsigned        spi_baryc_cntl;
                        unsigned        spi_ps_in_control;
                        unsigned        spi_shader_z_format;
                        unsigned        spi_shader_col_format;
                        unsigned        cb_shader_mask;
                } ps;
        } ctx_reg;

        /*For save precompute registers value */
        unsigned vgt_tf_param; /* VGT_TF_PARAM */
        unsigned vgt_vertex_reuse_block_cntl; /* VGT_VERTEX_REUSE_BLOCK_CNTL */
        unsigned ge_cntl;
};

struct si_shader_part {
        struct si_shader_part *next;
        union si_shader_part_key key;
        struct si_shader_binary binary;
        struct ac_shader_config config;
};

/* si_shader.c */
struct si_shader *
si_generate_gs_copy_shader(struct si_screen *sscreen,
                           struct ac_llvm_compiler *compiler,
                           struct si_shader_selector *gs_selector,
                           struct pipe_debug_callback *debug);
int si_compile_tgsi_shader(struct si_screen *sscreen,
                           struct ac_llvm_compiler *compiler,
                           struct si_shader *shader,
                           struct pipe_debug_callback *debug);
bool si_shader_create(struct si_screen *sscreen, struct ac_llvm_compiler *compiler,
                     struct si_shader *shader,
                     struct pipe_debug_callback *debug);
void si_shader_destroy(struct si_shader *shader);
unsigned si_shader_io_get_unique_index_patch(unsigned semantic_name, unsigned index);
unsigned si_shader_io_get_unique_index(unsigned semantic_name, unsigned index,
                                       unsigned is_varying);
bool si_shader_binary_upload(struct si_screen *sscreen, struct si_shader *shader,
                             uint64_t scratch_va);
void si_shader_dump(struct si_screen *sscreen, struct si_shader *shader,
                    struct pipe_debug_callback *debug,
                    FILE *f, bool check_debug_option);
void si_shader_dump_stats_for_shader_db(struct si_screen *screen,
                                        struct si_shader *shader,
                                        struct pipe_debug_callback *debug);
void si_multiwave_lds_size_workaround(struct si_screen *sscreen,
                                      unsigned *lds_size);
const char *si_get_shader_name(const struct si_shader *shader);
void si_shader_binary_clean(struct si_shader_binary *binary);

/* si_shader_nir.c */
void si_nir_scan_shader(const struct nir_shader *nir,
                        struct tgsi_shader_info *info);
void si_nir_scan_tess_ctrl(const struct nir_shader *nir,
                           struct tgsi_tessctrl_info *out);
void si_nir_lower_ps_inputs(struct nir_shader *nir);
void si_lower_nir(struct si_shader_selector *sel, unsigned wave_size);
void si_nir_opts(struct nir_shader *nir);

/* si_state_shaders.c */
void gfx9_get_gs_info(struct si_shader_selector *es,
                      struct si_shader_selector *gs,
                      struct gfx9_gs_info *out);

/* Inline helpers. */

/* Return the pointer to the main shader part's pointer. */
static inline struct si_shader **
si_get_main_shader_part(struct si_shader_selector *sel,
                        struct si_shader_key *key)
{
        if (key->as_ls)
                return &sel->main_shader_part_ls;
        if (key->as_es && key->as_ngg)
                return &sel->main_shader_part_ngg_es;
        if (key->as_es)
                return &sel->main_shader_part_es;
        if (key->as_ngg)
                return &sel->main_shader_part_ngg;
        return &sel->main_shader_part;
}

static inline bool
si_shader_uses_bindless_samplers(struct si_shader_selector *selector)
{
        return selector ? selector->info.uses_bindless_samplers : false;
}

static inline bool
si_shader_uses_bindless_images(struct si_shader_selector *selector)
{
        return selector ? selector->info.uses_bindless_images : false;
}

void si_destroy_shader_selector(struct si_context *sctx,
                                struct si_shader_selector *sel);

static inline void
si_shader_selector_reference(struct si_context *sctx,
                             struct si_shader_selector **dst,
                             struct si_shader_selector *src)
{
        if (pipe_reference(&(*dst)->reference, &src->reference))
                si_destroy_shader_selector(sctx, *dst);

        *dst = src;
}

#endif