summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/gallivm/gallivm_cpu.cpp
blob: 8f9830d0b1e87a19371403cbc969fafd0f34d694 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/**************************************************************************
 *
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
 *
 **************************************************************************/

 /*
  * Authors:
  *   Zack Rusin zack@tungstengraphics.com
  */
#ifdef MESA_LLVM

#include "gallivm.h"
#include "gallivm_p.h"

#include "instructions.h"
#include "loweringpass.h"
#include "storage.h"
#include "tgsitollvm.h"

#include "pipe/p_context.h"
#include "pipe/p_shader_tokens.h"

#include "tgsi/exec/tgsi_exec.h"
#include "tgsi/util/tgsi_dump.h"

#include <llvm/Module.h>
#include <llvm/CallingConv.h>
#include <llvm/Constants.h>
#include <llvm/DerivedTypes.h>
#include <llvm/Instructions.h>
#include <llvm/ModuleProvider.h>
#include <llvm/Pass.h>
#include <llvm/PassManager.h>
#include <llvm/ParameterAttributes.h>
#include <llvm/Support/PatternMatch.h>
#include <llvm/ExecutionEngine/JIT.h>
#include <llvm/ExecutionEngine/Interpreter.h>
#include <llvm/ExecutionEngine/GenericValue.h>
#include <llvm/Support/MemoryBuffer.h>
#include <llvm/LinkAllPasses.h>
#include <llvm/Analysis/Verifier.h>
#include <llvm/Analysis/LoopPass.h>
#include <llvm/Target/TargetData.h>
#include <llvm/Bitcode/ReaderWriter.h>
#include <llvm/Transforms/Utils/Cloning.h>

#include <sstream>
#include <fstream>
#include <iostream>

struct gallivm_cpu_engine {
   llvm::ExecutionEngine *engine;
};

static struct gallivm_cpu_engine *CPU = 0;

typedef int (*fragment_shader_runner)(float x, float y,
                                      float (*dests)[16][4],
                                      float (*inputs)[16][4],
                                      int num_attribs,
                                      float (*consts)[4], int num_consts,
                                      struct tgsi_sampler *samplers);

int gallivm_cpu_fs_exec(struct gallivm_prog *prog,
                        float fx, float fy,
                        float (*dests)[16][4],
                        float (*inputs)[16][4],
                        float (*consts)[4],
                        struct tgsi_sampler *samplers)
{
   fragment_shader_runner runner = reinterpret_cast<fragment_shader_runner>(prog->function);
   assert(runner);

   return runner(fx, fy, dests, inputs, prog->num_interp,
                 consts, prog->num_consts,
                 samplers);
}

static inline llvm::Function *func_for_shader(struct gallivm_prog *prog)
{
   llvm::Module *mod = prog->module;
   llvm::Function *func = 0;

   switch (prog->type) {
   case GALLIVM_VS:
      func = mod->getFunction("vs_shader");
      break;
   case GALLIVM_FS:
      func = mod->getFunction("fs_shader");
      break;
   default:
      assert(!"Unknown shader type!");
      break;
   }
   return func;
}

/*!
  This function creates a CPU based execution engine for the given gallivm_prog.
  gallivm_cpu_engine should be used as a singleton throughout the library. Before
  executing gallivm_prog_exec one needs to call gallivm_cpu_jit_compile.
  The gallivm_prog instance which is being passed to the constructor is being
  automatically JIT compiled so one shouldn't call gallivm_cpu_jit_compile
  with it again.
 */
struct gallivm_cpu_engine * gallivm_cpu_engine_create(struct gallivm_prog *prog)
{
   struct gallivm_cpu_engine *cpu = (struct gallivm_cpu_engine *)
                                    calloc(1, sizeof(struct gallivm_cpu_engine));
   llvm::Module *mod = static_cast<llvm::Module*>(prog->module);
   llvm::ExistingModuleProvider *mp = new llvm::ExistingModuleProvider(mod);
   llvm::ExecutionEngine *ee = llvm::ExecutionEngine::create(mp, false);
   ee->DisableLazyCompilation();
   cpu->engine = ee;

   llvm::Function *func = func_for_shader(prog);

   prog->function = ee->getPointerToFunction(func);
   CPU = cpu;
   return cpu;
}


/*!
  This function JIT compiles the given gallivm_prog with the given cpu based execution engine.
  The reference to the generated machine code entry point will be stored
  in the gallivm_prog program. After executing this function one can call gallivm_prog_exec
  in order to execute the gallivm_prog on the CPU.
 */
void gallivm_cpu_jit_compile(struct gallivm_cpu_engine *cpu, struct gallivm_prog *prog)
{
   llvm::Module *mod = static_cast<llvm::Module*>(prog->module);
   llvm::ExistingModuleProvider *mp = new llvm::ExistingModuleProvider(mod);
   llvm::ExecutionEngine *ee = cpu->engine;
   assert(ee);
   /*FIXME : remove */
   ee->DisableLazyCompilation();
   ee->addModuleProvider(mp);

   llvm::Function *func = func_for_shader(prog);
   prog->function = ee->getPointerToFunction(func);
}

void gallivm_cpu_engine_delete(struct gallivm_cpu_engine *cpu)
{
   free(cpu);
}

struct gallivm_cpu_engine * gallivm_global_cpu_engine()
{
   return CPU;
}


typedef void (*vertex_shader_runner)(void *ainputs,
                                     void *dests,
                                     float (*aconsts)[4],
                                     void *temps);


/*!
  This function is used to execute the gallivm_prog in software. Before calling
  this function the gallivm_prog has to be JIT compiled with the gallivm_cpu_jit_compile
  function.
 */
int gallivm_cpu_vs_exec(struct gallivm_prog *prog,
                        struct tgsi_exec_vector       *inputs,
                        struct tgsi_exec_vector       *dests,
                        float (*consts)[4],
                        struct tgsi_exec_vector       *temps)
{
   vertex_shader_runner runner = reinterpret_cast<vertex_shader_runner>(prog->function);
   assert(runner);
   /*FIXME*/
   runner(inputs, dests, consts, temps);

   return 0;
}

#endif