/*
 * Copyright © 2015 Intel Corporation
 *
 * 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, sublicense,
 * 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 NONINFRINGEMENT.  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.
 */

#ifndef _NIR_SPIRV_H_
#define _NIR_SPIRV_H_

#include "util/disk_cache.h"
#include "compiler/nir/nir_defines.h"
#include "compiler/shader_info.h"

#ifdef __cplusplus
extern "C" {
#endif

struct spirv_capabilities;

struct nir_spirv_specialization {
   uint32_t id;
   nir_const_value value;
   bool defined_on_module;
};

enum nir_spirv_debug_level {
   NIR_SPIRV_DEBUG_LEVEL_INVALID = -1,
   NIR_SPIRV_DEBUG_LEVEL_INFO,
   NIR_SPIRV_DEBUG_LEVEL_WARNING,
   NIR_SPIRV_DEBUG_LEVEL_ERROR,
};

enum nir_spirv_execution_environment {
   NIR_SPIRV_VULKAN = 0,
   NIR_SPIRV_OPENCL,
   NIR_SPIRV_OPENGL,
};

struct spirv_to_nir_options {
   enum nir_spirv_execution_environment environment;

   /* Whether to keep ViewIndex as an input instead of rewriting to a sysval.
    */
   bool view_index_is_input;

   /* Create a nir library. */
   bool create_library;

   /* Initial value for shader_info::float_controls_execution_mode,
    * indicates hardware requirements rather than shader author intent
    */
   uint32_t float_controls_execution_mode;

   /* True if RelaxedPrecision-decorated ALU result values should be performed
    * with 16-bit math.
    */
   bool mediump_16bit_alu;

   /* When mediump_16bit_alu is set, determines whether ddx/ddy can be
    * performed in 16-bit math.
    */
   bool mediump_16bit_derivatives;

   /* These really early AMD extensions don't have capabilities */
   bool amd_gcn_shader;
   bool amd_shader_ballot;
   bool amd_trinary_minmax;
   bool amd_shader_explicit_vertex_parameter;

   /* Whether or not printf is supported */
   bool printf;

   /* Whether or not the driver wants consume debug information (Debugging purposes). */
   bool debug_info;

   const struct spirv_capabilities *capabilities;

   /* Address format for various kinds of pointers. */
   nir_address_format ubo_addr_format;
   nir_address_format ssbo_addr_format;
   nir_address_format phys_ssbo_addr_format;
   nir_address_format push_const_addr_format;
   nir_address_format shared_addr_format;
   nir_address_format task_payload_addr_format;
   nir_address_format global_addr_format;
   nir_address_format temp_addr_format;
   nir_address_format constant_addr_format;

   /** Minimum UBO alignment.
    *
    * This should match VkPhysicalDeviceLimits::minUniformBufferOffsetAlignment
    */
   uint32_t min_ubo_alignment;

   /** Minimum SSBO alignment.
    *
    * This should match VkPhysicalDeviceLimits::minStorageBufferOffsetAlignment
    */
   uint32_t min_ssbo_alignment;

   const nir_shader *clc_shader;

   struct {
      void (*func)(void *private_data,
                   enum nir_spirv_debug_level level,
                   size_t spirv_offset,
                   const char *message);
      void *private_data;
   } debug;

   /* Whether debug_break instructions should be emitted. */
   bool emit_debug_break;

   struct {
      /* Force texture sampling to be non-uniform. */
      bool force_tex_non_uniform;
      /* Force SSBO accesses to be non-uniform. */
      bool force_ssbo_non_uniform;

      /* Whether OpTerminateInvocation should be lowered to OpKill to workaround
       * game bugs.
       */
      bool lower_terminate_to_discard;
   } workarounds;

   /* In Debug Builds, instead of emitting an OS break on failure, just return NULL from
    * spirv_to_nir().  This is useful for the unit tests that want to report a test failed
    * but continue executing other tests.
    */
   bool skip_os_break_in_debug_build;

   /* Shader index provided by VkPipelineShaderStageNodeCreateInfoAMDX */
   uint32_t shader_index;

   /* If GroupNonUniform capability is used, set this api subgroup size. */
   uint8_t group_non_uniform_subgroup_size;
};

enum spirv_verify_result {
   SPIRV_VERIFY_OK = 0,
   SPIRV_VERIFY_PARSER_ERROR = 1,
   SPIRV_VERIFY_ENTRY_POINT_NOT_FOUND = 2,
   SPIRV_VERIFY_UNKNOWN_SPEC_INDEX = 3,
};

enum spirv_verify_result spirv_verify_gl_specialization_constants(
   const uint32_t *words, size_t word_count,
   struct nir_spirv_specialization *spec, unsigned num_spec,
   mesa_shader_stage stage, const char *entry_point_name);

nir_shader *spirv_to_nir(const uint32_t *words, size_t word_count,
                         struct nir_spirv_specialization *specializations,
                         unsigned num_specializations,
                         mesa_shader_stage stage, const char *entry_point_name,
                         const struct spirv_to_nir_options *options,
                         const nir_shader_compiler_options *nir_options);

void spirv_print_asm(FILE *fp, const uint32_t *words, size_t word_count);

#ifdef __cplusplus
}
#endif

#endif /* _NIR_SPIRV_H_ */
