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 "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[5];
  82       LLVMTypeRef context_type;
  83
  84       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  85       elem_types[1] = LLVMPointerType(LLVMInt8Type(), 0);  /* samplers */
  86       elem_types[2] = LLVMFloatType();                     /* alpha_ref_value */
  87       elem_types[3] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
  88       elem_types[4] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
  89
  90       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  91
  92       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
  93                              screen->target, context_type, 0);
  94       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, samplers,
  95                              screen->target, context_type, 1);
  96       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
  97                              screen->target, context_type, 2);
  98       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
  99                              screen->target, context_type, 3);
 100       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
 101                              screen->target, context_type,
 102                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 103       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 104                            screen->target, context_type);
 105
 106       LLVMAddTypeName(screen->module, "context", context_type);
 107
 108       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 109    }
 110
 111    /* fetch_texel
 112     */
 113    {
 114       LLVMTypeRef ret_type;
 115       LLVMTypeRef arg_types[3];
 116       LLVMValueRef fetch_texel;
 117
 118       ret_type = LLVMVoidType();
 119       arg_types[0] = LLVMPointerType(LLVMInt8Type(), 0);  /* samplers */
 120       arg_types[1] = LLVMInt32Type();                     /* unit */
 121       arg_types[2] = LLVMPointerType(LLVMVectorType(LLVMFloatType(), 4), 0); /* store */
 122
 123       fetch_texel = lp_declare_intrinsic(screen->module, "fetch_texel",
 124                                          ret_type, arg_types, Elements(arg_types));
 125
 126       LLVMAddGlobalMapping(screen->engine, fetch_texel, lp_fetch_texel_soa);
 127    }
 128
 129 #ifdef DEBUG
 130    LLVMDumpModule(screen->module);
 131 #endif
 132 }
 133
 134
 135 void
 136 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 137 {
 138    if(screen->engine)
 139       LLVMDisposeExecutionEngine(screen->engine);
 140
 141    if(screen->pass)
 142       LLVMDisposePassManager(screen->pass);
 143 }
 144
 145
 146 void
 147 lp_jit_screen_init(struct llvmpipe_screen *screen)
 148 {
 149    char *error = NULL;
 150
 151    util_cpu_detect();
 152
 153 #if 0
 154    /* For simulating less capable machines */
 155    util_cpu_caps.has_sse3 = 0;
 156    util_cpu_caps.has_sse4_1 = 0;
 157 #endif
 158
 159 #ifdef LLVM_NATIVE_ARCH
 160    LLVMLinkInJIT();
 161    LLVMInitializeNativeTarget();
 162 #endif
 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       abort();
 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 }