src/gallium/drivers/llvmpipe/lp_jit.c

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
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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
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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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_STRIDE] = LLVMInt32Type();
  61       elem_types[LP_JIT_TEXTURE_DATA] =
  62          LLVMArrayType(LLVMPointerType(LLVMInt8Type(), 0),
  63                        LP_MAX_TEXTURE_2D_LEVELS);
  64
  65       texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  66
  67       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, width,
  68                              screen->target, texture_type,
  69                              LP_JIT_TEXTURE_WIDTH);
  70       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, height,
  71                              screen->target, texture_type,
  72                              LP_JIT_TEXTURE_HEIGHT);
  73       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, depth,
  74                              screen->target, texture_type,
  75                              LP_JIT_TEXTURE_DEPTH);
  76       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, last_level,
  77                              screen->target, texture_type,
  78                              LP_JIT_TEXTURE_LAST_LEVEL);
  79       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, stride,
  80                              screen->target, texture_type,
  81                              LP_JIT_TEXTURE_STRIDE);
  82       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, data,
  83                              screen->target, texture_type,
  84                              LP_JIT_TEXTURE_DATA);
  85       LP_CHECK_STRUCT_SIZE(struct lp_jit_texture,
  86                            screen->target, texture_type);
  87
  88       LLVMAddTypeName(screen->module, "texture", texture_type);
  89    }
  90
  91    /* struct lp_jit_context */
  92    {
  93       LLVMTypeRef elem_types[8];
  94       LLVMTypeRef context_type;
  95
  96       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  97       elem_types[1] = LLVMFloatType();                     /* alpha_ref_value */      elem_types[2] = LLVMFloatType();                     /* scissor_xmin */
  98       elem_types[3] = LLVMFloatType();                     /* scissor_ymin */
  99       elem_types[4] = LLVMFloatType();                     /* scissor_xmax */
 100       elem_types[5] = LLVMFloatType();                     /* scissor_ymax */
 101       elem_types[6] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
 102       elem_types[7] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
 103
 104       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
 105
 106       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
 107                              screen->target, context_type, 0);
 108       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
 109                              screen->target, context_type, 1);
 110       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmin,
 111                              screen->target, context_type, 2);
 112       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymin,
 113                              screen->target, context_type, 3);
 114       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmax,
 115                              screen->target, context_type, 4);
 116       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymax,
 117                              screen->target, context_type, 5);
 118       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
 119                              screen->target, context_type, 6);
 120       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
 121                              screen->target, context_type,
 122                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 123       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 124                            screen->target, context_type);
 125
 126       LLVMAddTypeName(screen->module, "context", context_type);
 127
 128       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 129    }
 130
 131 #ifdef DEBUG
 132    LLVMDumpModule(screen->module);
 133 #endif
 134 }
 135
 136
 137 void
 138 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 139 {
 140    if(screen->engine)
 141       LLVMDisposeExecutionEngine(screen->engine);
 142
 143    if(screen->pass)
 144       LLVMDisposePassManager(screen->pass);
 145 }
 146
 147
 148 void
 149 lp_jit_screen_init(struct llvmpipe_screen *screen)
 150 {
 151    char *error = NULL;
 152
 153    util_cpu_detect();
 154
 155 #if 0
 156    /* For simulating less capable machines */
 157    util_cpu_caps.has_sse3 = 0;
 158    util_cpu_caps.has_ssse3 = 0;
 159    util_cpu_caps.has_sse4_1 = 0;
 160 #endif
 161
 162    lp_build_init();
 163
 164    screen->module = LLVMModuleCreateWithName("llvmpipe");
 165
 166    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 167
 168    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 169       _debug_printf("%s\n", error);
 170       LLVMDisposeMessage(error);
 171       assert(0);
 172    }
 173
 174    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 175
 176    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 177    LLVMAddTargetData(screen->target, screen->pass);
 178
 179    if ((LP_DEBUG & DEBUG_NO_LLVM_OPT) == 0) {
 180       /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 181        * but there are more on SVN. */
 182       /* TODO: Add more passes */
 183       LLVMAddConstantPropagationPass(screen->pass);
 184       if(util_cpu_caps.has_sse4_1) {
 185          /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 186           * and sitofp (necessary for trunc/floor/ceil/round implementation)
 187           * somehow becomes invalid code.
 188           */
 189          LLVMAddInstructionCombiningPass(screen->pass);
 190       }
 191       LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 192       LLVMAddGVNPass(screen->pass);
 193       LLVMAddCFGSimplificationPass(screen->pass);
 194    }
 195
 196    lp_jit_init_globals(screen);
 197 }