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_bld_misc.h"
  43 #include "lp_jit.h"
  44
  45
  46 static void
  47 lp_jit_init_globals(struct llvmpipe_screen *screen)
  48 {
  49    LLVMTypeRef texture_type;
  50
  51    /* struct lp_jit_texture */
  52    {
  53       LLVMTypeRef elem_types[4];
  54
  55       elem_types[LP_JIT_TEXTURE_WIDTH]  = LLVMInt32Type();
  56       elem_types[LP_JIT_TEXTURE_HEIGHT] = LLVMInt32Type();
  57       elem_types[LP_JIT_TEXTURE_STRIDE] = LLVMInt32Type();
  58       elem_types[LP_JIT_TEXTURE_DATA]   = LLVMPointerType(LLVMInt8Type(), 0);
  59
  60       texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  61
  62       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, width,
  63                              screen->target, texture_type,
  64                              LP_JIT_TEXTURE_WIDTH);
  65       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, height,
  66                              screen->target, texture_type,
  67                              LP_JIT_TEXTURE_HEIGHT);
  68       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, stride,
  69                              screen->target, texture_type,
  70                              LP_JIT_TEXTURE_STRIDE);
  71       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, data,
  72                              screen->target, texture_type,
  73                              LP_JIT_TEXTURE_DATA);
  74       LP_CHECK_STRUCT_SIZE(struct lp_jit_texture,
  75                            screen->target, texture_type);
  76
  77       LLVMAddTypeName(screen->module, "texture", texture_type);
  78    }
  79
  80    /* struct lp_jit_context */
  81    {
  82       LLVMTypeRef elem_types[5];
  83       LLVMTypeRef context_type;
  84
  85       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  86       elem_types[1] = LLVMPointerType(LLVMInt8Type(), 0);  /* samplers */
  87       elem_types[2] = LLVMFloatType();                     /* alpha_ref_value */
  88       elem_types[3] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
  89       elem_types[4] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
  90
  91       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  92
  93       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
  94                              screen->target, context_type, 0);
  95       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, samplers,
  96                              screen->target, context_type, 1);
  97       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
  98                              screen->target, context_type, 2);
  99       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
 100                              screen->target, context_type, 3);
 101       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
 102                              screen->target, context_type,
 103                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 104       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 105                            screen->target, context_type);
 106
 107       LLVMAddTypeName(screen->module, "context", context_type);
 108
 109       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 110    }
 111
 112    /* fetch_texel
 113     */
 114    {
 115       LLVMTypeRef ret_type;
 116       LLVMTypeRef arg_types[3];
 117       LLVMValueRef fetch_texel;
 118
 119       ret_type = LLVMVoidType();
 120       arg_types[0] = LLVMPointerType(LLVMInt8Type(), 0);  /* samplers */
 121       arg_types[1] = LLVMInt32Type();                     /* unit */
 122       arg_types[2] = LLVMPointerType(LLVMVectorType(LLVMFloatType(), 4), 0); /* store */
 123
 124       fetch_texel = lp_declare_intrinsic(screen->module, "fetch_texel",
 125                                          ret_type, arg_types, Elements(arg_types));
 126
 127       LLVMAddGlobalMapping(screen->engine, fetch_texel, lp_fetch_texel_soa);
 128    }
 129
 130 #ifdef DEBUG
 131    LLVMDumpModule(screen->module);
 132 #endif
 133 }
 134
 135
 136 void
 137 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 138 {
 139    if(screen->engine)
 140       LLVMDisposeExecutionEngine(screen->engine);
 141
 142    if(screen->pass)
 143       LLVMDisposePassManager(screen->pass);
 144 }
 145
 146
 147 void
 148 lp_jit_screen_init(struct llvmpipe_screen *screen)
 149 {
 150    char *error = NULL;
 151
 152    util_cpu_detect();
 153
 154 #if 0
 155    /* For simulating less capable machines */
 156    util_cpu_caps.has_sse3 = 0;
 157    util_cpu_caps.has_ssse3 = 0;
 158    util_cpu_caps.has_sse4_1 = 0;
 159 #endif
 160
 161    LLVMLinkInJIT();
 162    LLVMInitializeNativeTarget();
 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    /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 179     * but there are more on SVN. */
 180    /* TODO: Add more passes */
 181    LLVMAddConstantPropagationPass(screen->pass);
 182    if(util_cpu_caps.has_sse4_1) {
 183       /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 184        * and sitofp (necessary for trunc/floor/ceil/round implementation)
 185        * somehow becomes invalid code.
 186        */
 187       LLVMAddInstructionCombiningPass(screen->pass);
 188    }
 189    LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 190    LLVMAddGVNPass(screen->pass);
 191    LLVMAddCFGSimplificationPass(screen->pass);
 192
 193    lp_jit_init_globals(screen);
 194 }