src/gallium/drivers/llvmpipe/lp_jit.c

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  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 "lp_screen.h"
  41 #include "lp_bld_intr.h"
  42 #include "lp_jit.h"
  43
  44
  45 static void
  46 lp_jit_init_globals(struct llvmpipe_screen *screen)
  47 {
  48    LLVMTypeRef texture_type;
  49
  50    /* struct lp_jit_texture */
  51    {
  52       LLVMTypeRef elem_types[4];
  53
  54       elem_types[LP_JIT_TEXTURE_WIDTH]  = LLVMInt32Type();
  55       elem_types[LP_JIT_TEXTURE_HEIGHT] = LLVMInt32Type();
  56       elem_types[LP_JIT_TEXTURE_STRIDE] = LLVMInt32Type();
  57       elem_types[LP_JIT_TEXTURE_DATA]   = LLVMPointerType(LLVMInt8Type(), 0);
  58
  59       texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  60
  61       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, width,
  62                              screen->target, texture_type,
  63                              LP_JIT_TEXTURE_WIDTH);
  64       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, height,
  65                              screen->target, texture_type,
  66                              LP_JIT_TEXTURE_HEIGHT);
  67       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, stride,
  68                              screen->target, texture_type,
  69                              LP_JIT_TEXTURE_STRIDE);
  70       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, data,
  71                              screen->target, texture_type,
  72                              LP_JIT_TEXTURE_DATA);
  73       LP_CHECK_STRUCT_SIZE(struct lp_jit_texture,
  74                            screen->target, texture_type);
  75
  76       LLVMAddTypeName(screen->module, "texture", texture_type);
  77    }
  78
  79    /* struct lp_jit_context */
  80    {
  81       LLVMTypeRef elem_types[4];
  82       LLVMTypeRef context_type;
  83
  84       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  85       elem_types[1] = LLVMFloatType();                     /* alpha_ref_value */
  86       elem_types[2] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
  87       elem_types[3] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
  88
  89       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  90
  91       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
  92                              screen->target, context_type, 0);
  93       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
  94                              screen->target, context_type, 1);
  95       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
  96                              screen->target, context_type, 2);
  97       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
  98                              screen->target, context_type,
  99                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 100       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 101                            screen->target, context_type);
 102
 103       LLVMAddTypeName(screen->module, "context", context_type);
 104
 105       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 106    }
 107
 108 #ifdef DEBUG
 109    LLVMDumpModule(screen->module);
 110 #endif
 111 }
 112
 113
 114 void
 115 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 116 {
 117    if(screen->engine)
 118       LLVMDisposeExecutionEngine(screen->engine);
 119
 120    if(screen->pass)
 121       LLVMDisposePassManager(screen->pass);
 122 }
 123
 124
 125 void
 126 lp_jit_screen_init(struct llvmpipe_screen *screen)
 127 {
 128    char *error = NULL;
 129
 130    util_cpu_detect();
 131
 132 #if 0
 133    /* For simulating less capable machines */
 134    util_cpu_caps.has_sse3 = 0;
 135    util_cpu_caps.has_ssse3 = 0;
 136    util_cpu_caps.has_sse4_1 = 0;
 137 #endif
 138
 139    LLVMLinkInJIT();
 140    LLVMInitializeNativeTarget();
 141
 142    screen->module = LLVMModuleCreateWithName("llvmpipe");
 143
 144    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 145
 146    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 147       _debug_printf("%s\n", error);
 148       LLVMDisposeMessage(error);
 149       assert(0);
 150    }
 151
 152    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 153
 154    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 155    LLVMAddTargetData(screen->target, screen->pass);
 156    /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 157     * but there are more on SVN. */
 158    /* TODO: Add more passes */
 159    LLVMAddConstantPropagationPass(screen->pass);
 160    if(util_cpu_caps.has_sse4_1) {
 161       /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 162        * and sitofp (necessary for trunc/floor/ceil/round implementation)
 163        * somehow becomes invalid code.
 164        */
 165       LLVMAddInstructionCombiningPass(screen->pass);
 166    }
 167    LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 168    LLVMAddGVNPass(screen->pass);
 169    LLVMAddCFGSimplificationPass(screen->pass);
 170
 171    lp_jit_init_globals(screen);
 172 }