src/gallium/drivers/llvmpipe/lp_jit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
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   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * C - JIT interfaces
  31  *
  32  * @author Jose Fonseca <jfonseca@vmware.com>
  33  */
  34
  35
  36 #include <llvm-c/Transforms/Scalar.h>
  37
  38 #include "util/u_memory.h"
  39 #include "util/u_cpu_detect.h"
  40 #include "gallivm/lp_bld_init.h"
  41 #include "lp_debug.h"
  42 #include "lp_screen.h"
  43 #include "gallivm/lp_bld_intr.h"
  44 #include "lp_jit.h"
  45
  46
  47 static void
  48 lp_jit_init_globals(struct llvmpipe_screen *screen)
  49 {
  50    LLVMTypeRef texture_type;
  51
  52    /* struct lp_jit_texture */
  53    {
  54       LLVMTypeRef elem_types[6];
  55
  56       elem_types[LP_JIT_TEXTURE_WIDTH]  = LLVMInt32Type();
  57       elem_types[LP_JIT_TEXTURE_HEIGHT] = LLVMInt32Type();
  58       elem_types[LP_JIT_TEXTURE_DEPTH] = LLVMInt32Type();
  59       elem_types[LP_JIT_TEXTURE_LAST_LEVEL] = LLVMInt32Type();
  60       elem_types[LP_JIT_TEXTURE_ROW_STRIDE] =
  61          LLVMArrayType(LLVMInt32Type(), LP_MAX_TEXTURE_2D_LEVELS);
  62       elem_types[LP_JIT_TEXTURE_DATA] =
  63          LLVMArrayType(LLVMPointerType(LLVMInt8Type(), 0),
  64                        LP_MAX_TEXTURE_2D_LEVELS);
  65
  66       texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  67
  68       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, width,
  69                              screen->target, texture_type,
  70                              LP_JIT_TEXTURE_WIDTH);
  71       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, height,
  72                              screen->target, texture_type,
  73                              LP_JIT_TEXTURE_HEIGHT);
  74       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, depth,
  75                              screen->target, texture_type,
  76                              LP_JIT_TEXTURE_DEPTH);
  77       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, last_level,
  78                              screen->target, texture_type,
  79                              LP_JIT_TEXTURE_LAST_LEVEL);
  80       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, row_stride,
  81                              screen->target, texture_type,
  82                              LP_JIT_TEXTURE_ROW_STRIDE);
  83       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, data,
  84                              screen->target, texture_type,
  85                              LP_JIT_TEXTURE_DATA);
  86       LP_CHECK_STRUCT_SIZE(struct lp_jit_texture,
  87                            screen->target, texture_type);
  88
  89       LLVMAddTypeName(screen->module, "texture", texture_type);
  90    }
  91
  92    /* struct lp_jit_context */
  93    {
  94       LLVMTypeRef elem_types[8];
  95       LLVMTypeRef context_type;
  96
  97       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  98       elem_types[1] = LLVMFloatType();                     /* alpha_ref_value */      elem_types[2] = LLVMFloatType();                     /* scissor_xmin */
  99       elem_types[3] = LLVMFloatType();                     /* scissor_ymin */
 100       elem_types[4] = LLVMFloatType();                     /* scissor_xmax */
 101       elem_types[5] = LLVMFloatType();                     /* scissor_ymax */
 102       elem_types[6] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
 103       elem_types[7] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
 104
 105       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
 106
 107       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
 108                              screen->target, context_type, 0);
 109       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
 110                              screen->target, context_type, 1);
 111       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmin,
 112                              screen->target, context_type, 2);
 113       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymin,
 114                              screen->target, context_type, 3);
 115       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmax,
 116                              screen->target, context_type, 4);
 117       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymax,
 118                              screen->target, context_type, 5);
 119       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
 120                              screen->target, context_type, 6);
 121       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
 122                              screen->target, context_type,
 123                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 124       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 125                            screen->target, context_type);
 126
 127       LLVMAddTypeName(screen->module, "context", context_type);
 128
 129       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 130    }
 131
 132 #ifdef DEBUG
 133    LLVMDumpModule(screen->module);
 134 #endif
 135 }
 136
 137
 138 void
 139 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 140 {
 141    if(screen->engine)
 142       LLVMDisposeExecutionEngine(screen->engine);
 143
 144    if(screen->pass)
 145       LLVMDisposePassManager(screen->pass);
 146 }
 147
 148
 149 void
 150 lp_jit_screen_init(struct llvmpipe_screen *screen)
 151 {
 152    char *error = NULL;
 153
 154    util_cpu_detect();
 155
 156 #if 0
 157    /* For simulating less capable machines */
 158    util_cpu_caps.has_sse3 = 0;
 159    util_cpu_caps.has_ssse3 = 0;
 160    util_cpu_caps.has_sse4_1 = 0;
 161 #endif
 162
 163    lp_build_init();
 164
 165    screen->module = LLVMModuleCreateWithName("llvmpipe");
 166
 167    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 168
 169    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 170       _debug_printf("%s\n", error);
 171       LLVMDisposeMessage(error);
 172       assert(0);
 173    }
 174
 175    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 176
 177    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 178    LLVMAddTargetData(screen->target, screen->pass);
 179
 180    if ((LP_DEBUG & DEBUG_NO_LLVM_OPT) == 0) {
 181       /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 182        * but there are more on SVN. */
 183       /* TODO: Add more passes */
 184       LLVMAddConstantPropagationPass(screen->pass);
 185       if(util_cpu_caps.has_sse4_1) {
 186          /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 187           * and sitofp (necessary for trunc/floor/ceil/round implementation)
 188           * somehow becomes invalid code.
 189           */
 190          LLVMAddInstructionCombiningPass(screen->pass);
 191       }
 192       LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 193       LLVMAddGVNPass(screen->pass);
 194       LLVMAddCFGSimplificationPass(screen->pass);
 195    }
 196
 197    lp_jit_init_globals(screen);
 198 }