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#include "draw_llvm.h"
#include "draw_context.h"
#include "draw_vs.h"
#include "gallivm/lp_bld_arit.h"
#include "gallivm/lp_bld_interp.h"
#include "gallivm/lp_bld_struct.h"
#include "gallivm/lp_bld_type.h"
#include "gallivm/lp_bld_flow.h"
#include "gallivm/lp_bld_debug.h"
#include "gallivm/lp_bld_tgsi.h"
#include "util/u_cpu_detect.h"
#include <llvm-c/Transforms/Scalar.h>
static void
init_globals(struct draw_llvm *llvm)
{
LLVMTypeRef vertex_header;
LLVMTypeRef texture_type;
/* struct vertex_header */
{
LLVMTypeRef elem_types[3];
elem_types[0] = LLVMIntType(32);
elem_types[1] = LLVMArrayType(LLVMFloatType(), 4);
elem_types[2] = LLVMArrayType(elem_types[1], 0);
vertex_header = LLVMStructType(elem_types, Elements(elem_types), 0);
/* these are bit-fields and we can't take address of them
LP_CHECK_MEMBER_OFFSET(struct vertex_header, clipmask,
llvm->target, vertex_header,
DRAW_JIT_VERTEX_CLIPMASK);
LP_CHECK_MEMBER_OFFSET(struct vertex_header, edgeflag,
llvm->target, vertex_header,
DRAW_JIT_VERTEX_EDGEFLAG);
LP_CHECK_MEMBER_OFFSET(struct vertex_header, pad,
llvm->target, vertex_header,
DRAW_JIT_VERTEX_PAD);
LP_CHECK_MEMBER_OFFSET(struct vertex_header, vertex_id,
llvm->target, vertex_header,
DRAW_JIT_VERTEX_VERTEX_ID);
*/
LP_CHECK_MEMBER_OFFSET(struct vertex_header, clip,
llvm->target, vertex_header,
DRAW_JIT_VERTEX_CLIP);
LP_CHECK_MEMBER_OFFSET(struct vertex_header, data,
llvm->target, vertex_header,
DRAW_JIT_VERTEX_DATA);
LP_CHECK_STRUCT_SIZE(struct vertex_header,
llvm->target, vertex_header);
LLVMAddTypeName(llvm->module, "vertex_header", vertex_header);
llvm->vertex_header_ptr_type = LLVMPointerType(vertex_header, 0);
}
/* struct draw_jit_texture */
{
LLVMTypeRef elem_types[4];
elem_types[DRAW_JIT_TEXTURE_WIDTH] = LLVMInt32Type();
elem_types[DRAW_JIT_TEXTURE_HEIGHT] = LLVMInt32Type();
elem_types[DRAW_JIT_TEXTURE_STRIDE] = LLVMInt32Type();
elem_types[DRAW_JIT_TEXTURE_DATA] = LLVMPointerType(LLVMInt8Type(), 0);
texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, width,
llvm->target, texture_type,
DRAW_JIT_TEXTURE_WIDTH);
LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, height,
llvm->target, texture_type,
DRAW_JIT_TEXTURE_HEIGHT);
LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, stride,
llvm->target, texture_type,
DRAW_JIT_TEXTURE_STRIDE);
LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, data,
llvm->target, texture_type,
DRAW_JIT_TEXTURE_DATA);
LP_CHECK_STRUCT_SIZE(struct draw_jit_texture,
llvm->target, texture_type);
LLVMAddTypeName(llvm->module, "texture", texture_type);
}
/* struct draw_jit_context */
{
LLVMTypeRef elem_types[3];
LLVMTypeRef context_type;
elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* vs_constants */
elem_types[1] = LLVMPointerType(LLVMFloatType(), 0); /* vs_constants */
elem_types[2] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
LP_CHECK_MEMBER_OFFSET(struct draw_jit_context, vs_constants,
llvm->target, context_type, 0);
LP_CHECK_MEMBER_OFFSET(struct draw_jit_context, gs_constants,
llvm->target, context_type, 1);
LP_CHECK_MEMBER_OFFSET(struct draw_jit_context, textures,
llvm->target, context_type,
DRAW_JIT_CONTEXT_TEXTURES_INDEX);
LP_CHECK_STRUCT_SIZE(struct draw_jit_context,
llvm->target, context_type);
LLVMAddTypeName(llvm->module, "draw_jit_context", context_type);
llvm->context_ptr_type = LLVMPointerType(context_type, 0);
}
{
LLVMTypeRef buffer_ptr = LLVMPointerType(LLVMIntType(8), 0);
llvm->buffer_ptr_type = LLVMPointerType(buffer_ptr, 0);
}
}
struct draw_llvm *
draw_llvm_create(struct draw_context *draw)
{
struct draw_llvm *llvm = CALLOC_STRUCT( draw_llvm );
util_cpu_detect();
llvm->draw = draw;
llvm->engine = draw->engine;
debug_assert(llvm->engine);
llvm->module = LLVMModuleCreateWithName("draw_llvm");
llvm->provider = LLVMCreateModuleProviderForExistingModule(llvm->module);
LLVMAddModuleProvider(llvm->engine, llvm->provider);
llvm->target = LLVMGetExecutionEngineTargetData(llvm->engine);
llvm->pass = LLVMCreateFunctionPassManager(llvm->provider);
LLVMAddTargetData(llvm->target, llvm->pass);
/* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
* but there are more on SVN. */
/* TODO: Add more passes */
LLVMAddConstantPropagationPass(llvm->pass);
if(util_cpu_caps.has_sse4_1) {
/* FIXME: There is a bug in this pass, whereby the combination of fptosi
* and sitofp (necessary for trunc/floor/ceil/round implementation)
* somehow becomes invalid code.
*/
LLVMAddInstructionCombiningPass(llvm->pass);
}
LLVMAddPromoteMemoryToRegisterPass(llvm->pass);
LLVMAddGVNPass(llvm->pass);
LLVMAddCFGSimplificationPass(llvm->pass);
init_globals(llvm);
#if 1
LLVMDumpModule(llvm->module);
#endif
return llvm;
}
void
draw_llvm_destroy(struct draw_llvm *llvm)
{
free(llvm);
}
void
draw_llvm_prepare(struct draw_llvm *llvm)
{
draw_llvm_generate(llvm);
}
struct draw_context *draw_create_with_llvm(LLVMExecutionEngineRef engine)
{
struct draw_context *draw = CALLOC_STRUCT( draw_context );
if (draw == NULL)
goto fail;
draw->engine = engine;
if (!draw_init(draw))
goto fail;
return draw;
fail:
draw_destroy( draw );
return NULL;
}
static void
generate_vs(struct draw_llvm *llvm,
LLVMBuilderRef builder,
LLVMValueRef (*outputs)[NUM_CHANNELS],
const LLVMValueRef (*inputs)[NUM_CHANNELS],
LLVMValueRef context_ptr,
LLVMValueRef io)
{
const struct tgsi_token *tokens = llvm->draw->vs.vertex_shader->state.tokens;
struct lp_type vs_type;
LLVMValueRef consts_ptr = draw_jit_context_vs_constants(builder, context_ptr);
memset(&vs_type, 0, sizeof vs_type);
vs_type.floating = TRUE; /* floating point values */
vs_type.sign = TRUE; /* values are signed */
vs_type.norm = FALSE; /* values are not limited to [0,1] or [-1,1] */
vs_type.width = 32; /* 32-bit float */
vs_type.length = 4; /* 4 elements per vector */
#if 0
num_vs = 4; /* number of vertices per block */
#endif
lp_build_tgsi_soa(builder,
tokens,
vs_type,
NULL /*struct lp_build_mask_context *mask*/,
consts_ptr,
NULL /*pos*/,
inputs,
outputs,
NULL/*sampler*/);
}
static void
generate_fetch(LLVMBuilderRef builder,
LLVMValueRef vbuffers_ptr,
LLVMValueRef *res,
struct pipe_vertex_element *velem,
struct pipe_vertex_buffer *vbuf,
LLVMValueRef index)
{
LLVMValueRef indices = LLVMConstInt(LLVMInt64Type(), velem->vertex_buffer_index, 0);
LLVMValueRef vbuffer_ptr = LLVMBuildGEP(builder, vbuffers_ptr,
&indices, 1, "");
LLVMValueRef stride = LLVMBuildMul(builder,
LLVMConstInt(LLVMInt32Type(), vbuf->stride, 0),
index, "");
stride = LLVMBuildAdd(builder, stride,
LLVMConstInt(LLVMInt32Type(), vbuf->buffer_offset, 0),
"");
stride = LLVMBuildAdd(builder, stride,
LLVMConstInt(LLVMInt32Type(), velem->src_offset, 0),
"");
vbuffer_ptr = LLVMBuildGEP(builder, vbuffer_ptr, &stride, 1, "");
*res = draw_llvm_translate_from(builder, vbuffer_ptr, velem->src_format);
}
static LLVMValueRef
aos_to_soa(LLVMBuilderRef builder,
LLVMValueRef val0,
LLVMValueRef val1,
LLVMValueRef val2,
LLVMValueRef val3,
LLVMValueRef channel)
{
LLVMValueRef ex, res;
ex = LLVMBuildExtractElement(builder, val0,
channel, "");
res = LLVMBuildInsertElement(builder,
LLVMConstNull(LLVMTypeOf(val0)),
ex,
LLVMConstInt(LLVMInt32Type(), 0, 0),
"");
ex = LLVMBuildExtractElement(builder, val1,
channel, "");
res = LLVMBuildInsertElement(builder,
res, ex,
LLVMConstInt(LLVMInt32Type(), 1, 0),
"");
ex = LLVMBuildExtractElement(builder, val2,
channel, "");
res = LLVMBuildInsertElement(builder,
res, ex,
LLVMConstInt(LLVMInt32Type(), 2, 0),
"");
ex = LLVMBuildExtractElement(builder, val3,
channel, "");
res = LLVMBuildInsertElement(builder,
res, ex,
LLVMConstInt(LLVMInt32Type(), 3, 0),
"");
return res;
}
static void
convert_to_soa(LLVMBuilderRef builder,
LLVMValueRef (*aos)[NUM_CHANNELS],
LLVMValueRef (*soa)[NUM_CHANNELS],
int num_attribs)
{
int i;
debug_assert(NUM_CHANNELS == 4);
for (i = 0; i < num_attribs; ++i) {
LLVMValueRef val0 = aos[i][0];
LLVMValueRef val1 = aos[i][1];
LLVMValueRef val2 = aos[i][2];
LLVMValueRef val3 = aos[i][3];
soa[i][0] = aos_to_soa(builder, val0, val1, val2, val3,
LLVMConstInt(LLVMInt32Type(), 0, 0));
soa[i][1] = aos_to_soa(builder, val0, val1, val2, val3,
LLVMConstInt(LLVMInt32Type(), 1, 0));
soa[i][2] = aos_to_soa(builder, val0, val1, val2, val3,
LLVMConstInt(LLVMInt32Type(), 2, 0));
soa[i][3] = aos_to_soa(builder, val0, val1, val2, val3,
LLVMConstInt(LLVMInt32Type(), 3, 0));
}
}
void
draw_llvm_generate(struct draw_llvm *llvm)
{
LLVMTypeRef arg_types[6];
LLVMTypeRef func_type;
LLVMValueRef context_ptr;
LLVMBasicBlockRef block;
LLVMBuilderRef builder;
LLVMValueRef function;
LLVMValueRef start, end, count, stride, step;
LLVMValueRef io_ptr, vbuffers_ptr;
struct draw_context *draw = llvm->draw;
unsigned i, j;
struct lp_build_context bld;
struct lp_build_loop_state lp_loop;
struct lp_type vs_type = lp_type_float_vec(32);
const int max_vertices = 4;
LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][NUM_CHANNELS];
arg_types[0] = llvm->context_ptr_type; /* context */
arg_types[1] = llvm->vertex_header_ptr_type; /* vertex_header */
arg_types[2] = llvm->buffer_ptr_type; /* vbuffers */
arg_types[3] = LLVMInt32Type(); /* start */
arg_types[4] = LLVMInt32Type(); /* count */
arg_types[5] = LLVMInt32Type(); /* stride */
func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0);
function = LLVMAddFunction(llvm->module, "draw_llvm_shader", func_type);
LLVMSetFunctionCallConv(function, LLVMCCallConv);
for(i = 0; i < Elements(arg_types); ++i)
if(LLVMGetTypeKind(arg_types[i]) == LLVMPointerTypeKind)
LLVMAddAttribute(LLVMGetParam(function, i), LLVMNoAliasAttribute);
context_ptr = LLVMGetParam(function, 0);
io_ptr = LLVMGetParam(function, 1);
vbuffers_ptr = LLVMGetParam(function, 2);
start = LLVMGetParam(function, 3);
count = LLVMGetParam(function, 4);
stride = LLVMGetParam(function, 5);
lp_build_name(context_ptr, "context");
lp_build_name(io_ptr, "io");
lp_build_name(vbuffers_ptr, "vbuffers");
lp_build_name(start, "start");
lp_build_name(count, "count");
lp_build_name(stride, "stride");
/*
* Function body
*/
block = LLVMAppendBasicBlock(function, "entry");
builder = LLVMCreateBuilder();
LLVMPositionBuilderAtEnd(builder, block);
lp_build_context_init(&bld, builder, vs_type);
end = lp_build_add(&bld, start, count);
step = LLVMConstInt(LLVMInt32Type(), max_vertices, 0);
lp_build_loop_begin(builder, start, &lp_loop);
{
LLVMValueRef inputs[PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
LLVMValueRef aos_attribs[PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
LLVMValueRef io = LLVMBuildGEP(builder, io_ptr, &lp_loop.counter, 1, "");
const LLVMValueRef (*ptr_aos)[NUM_CHANNELS];
for (i = 0; i < NUM_CHANNELS; ++i) {
LLVMValueRef true_index = LLVMBuildAdd(
builder,
lp_loop.counter,
LLVMConstInt(LLVMInt32Type(), i, 0), "");
for (j = 0; j < draw->pt.nr_vertex_elements; ++j) {
struct pipe_vertex_element *velem = &draw->pt.vertex_element[j];
struct pipe_vertex_buffer *vbuf = &draw->pt.vertex_buffer[
velem->vertex_buffer_index];
generate_fetch(builder, vbuffers_ptr,
&aos_attribs[j][i], velem, vbuf, true_index);
}
}
convert_to_soa(builder, aos_attribs, inputs,
draw->pt.nr_vertex_elements);
ptr_aos = (const LLVMValueRef (*)[NUM_CHANNELS]) inputs;
generate_vs(llvm,
builder,
outputs,
ptr_aos,
context_ptr,
io);
LLVMDumpModule(llvm->module);
}
lp_build_loop_end(builder, end, step, &lp_loop);
LLVMBuildRetVoid(builder);
LLVMDisposeBuilder(builder);
/*
* Translate the LLVM IR into machine code.
*/
#ifdef DEBUG
if(LLVMVerifyFunction(function, LLVMPrintMessageAction)) {
LLVMDumpValue(function);
assert(0);
}
#endif
LLVMRunFunctionPassManager(llvm->pass, function);
if (1) {
LLVMDumpValue(function);
debug_printf("\n");
}
llvm->jit_func = (draw_jit_vert_func)LLVMGetPointerToGlobal(llvm->draw->engine, function);
if (1)
lp_disassemble(llvm->jit_func);
}
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