src/gallium/drivers/llvmpipe/lp_jit.c

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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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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  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 #ifdef DEBUG
 113    LLVMDumpModule(screen->module);
 114 #endif
 115 }
 116
 117
 118 void
 119 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 120 {
 121    if(screen->engine)
 122       LLVMDisposeExecutionEngine(screen->engine);
 123
 124    if(screen->pass)
 125       LLVMDisposePassManager(screen->pass);
 126 }
 127
 128
 129 void
 130 lp_jit_screen_init(struct llvmpipe_screen *screen)
 131 {
 132    char *error = NULL;
 133
 134    util_cpu_detect();
 135
 136 #if 0
 137    /* For simulating less capable machines */
 138    util_cpu_caps.has_sse3 = 0;
 139    util_cpu_caps.has_ssse3 = 0;
 140    util_cpu_caps.has_sse4_1 = 0;
 141 #endif
 142
 143    LLVMLinkInJIT();
 144    LLVMInitializeNativeTarget();
 145
 146    screen->module = LLVMModuleCreateWithName("llvmpipe");
 147
 148    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 149
 150    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 151       _debug_printf("%s\n", error);
 152       LLVMDisposeMessage(error);
 153       assert(0);
 154    }
 155
 156    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 157
 158    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 159    LLVMAddTargetData(screen->target, screen->pass);
 160    /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 161     * but there are more on SVN. */
 162    /* TODO: Add more passes */
 163    LLVMAddConstantPropagationPass(screen->pass);
 164    if(util_cpu_caps.has_sse4_1) {
 165       /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 166        * and sitofp (necessary for trunc/floor/ceil/round implementation)
 167        * somehow becomes invalid code.
 168        */
 169       LLVMAddInstructionCombiningPass(screen->pass);
 170    }
 171    LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 172    LLVMAddGVNPass(screen->pass);
 173    LLVMAddCFGSimplificationPass(screen->pass);
 174
 175    lp_jit_init_globals(screen);
 176 }