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#ifndef DRAW_LLVM_H
#define DRAW_LLVM_H
#include "draw/draw_private.h"
#include "pipe/p_context.h"
#include <llvm-c/Core.h>
#include <llvm-c/Analysis.h>
#include <llvm-c/Target.h>
#include <llvm-c/ExecutionEngine.h>
struct draw_jit_texture
{
uint32_t width;
uint32_t height;
uint32_t stride;
const void *data;
};
enum {
DRAW_JIT_TEXTURE_WIDTH = 0,
DRAW_JIT_TEXTURE_HEIGHT,
DRAW_JIT_TEXTURE_STRIDE,
DRAW_JIT_TEXTURE_DATA
};
enum {
DRAW_JIT_VERTEX_VERTEX_ID = 0,
DRAW_JIT_VERTEX_CLIP,
DRAW_JIT_VERTEX_DATA
};
/**
* This structure is passed directly to the generated vertex shader.
*
* It contains the derived state.
*
* Changes here must be reflected in the draw_jit_context_* macros.
* Changes to the ordering should be avoided.
*
* Only use types with a clear size and padding here, in particular prefer the
* stdint.h types to the basic integer types.
*/
struct draw_jit_context
{
const float *vs_constants;
const float *gs_constants;
struct draw_jit_texture textures[PIPE_MAX_SAMPLERS];
};
#define draw_jit_context_vs_constants(_builder, _ptr) \
lp_build_struct_get(_builder, _ptr, 0, "vs_constants")
#define draw_jit_context_gs_constants(_builder, _ptr) \
lp_build_struct_get(_builder, _ptr, 1, "gs_constants")
#define DRAW_JIT_CONTEXT_TEXTURES_INDEX 2
#define draw_jit_context_textures(_builder, _ptr) \
lp_build_struct_get_ptr(_builder, _ptr, DRAW_JIT_CONTEXT_TEXTURES_INDEX, "textures")
/* we are construction a function of the form:
struct vertex_header {
uint32 vertex_id;
float clip[4];
float data[][4];
};
struct draw_jit_context
{
const float *vs_constants;
const float *gs_constants;
struct draw_jit_texture textures[PIPE_MAX_SAMPLERS];
const void *vbuffers;
};
void
draw_shader(struct draw_jit_context *context,
struct vertex_header *io,
unsigned start,
unsigned count,
unsigned stride)
{
// do a fetch and a run vertex shader
for (int i = 0; i < count; ++i) {
struct vertex_header *header = &io[i];
header->vertex_id = 0xffff;
// follows code-genarted fetch/translate section
// for each vertex_element ...
codegened_translate(header->data[num_element],
context->vertex_elements[num_element],
context->vertex_buffers,
context->vbuffers);
codegened_vertex_shader(header->data, context->vs_constants);
}
for (int i = 0; i < count; i += context->primitive_size) {
struct vertex_header *prim[MAX_PRIMITIVE_SIZE];
for (int j = 0; j < context->primitive_size; ++j) {
header[j] = &io[i + j];
}
codegened_geometry_shader(prim, gs_constants);
}
}
*/
typedef void
(*draw_jit_vert_func)(struct draw_jit_context *context,
struct vertex_header *io,
unsigned start,
unsigned count,
unsigned stride);
struct draw_llvm {
struct draw_context *draw;
struct draw_jit_context jit_context;
draw_jit_vert_func jit_func;
LLVMModuleRef module;
LLVMExecutionEngineRef engine;
LLVMModuleProviderRef provider;
LLVMTargetDataRef target;
LLVMPassManagerRef pass;
LLVMTypeRef context_ptr_type;
LLVMTypeRef vertex_header_ptr_type;
};
struct draw_llvm *
draw_llvm_create(struct draw_context *draw);
void
draw_llvm_destroy(struct draw_llvm *llvm);
void
draw_llvm_prepare(struct draw_llvm *llvm);
/* generates the draw jit function */
void
draw_llvm_generate(struct draw_llvm *llvm);
#endif
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