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[4];
  83       LLVMTypeRef context_type;
  84
  85       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  86       elem_types[1] = LLVMFloatType();                     /* alpha_ref_value */
  87       elem_types[2] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
  88       elem_types[3] = 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, alpha_ref_value,
  95                              screen->target, context_type, 1);
  96       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
  97                              screen->target, context_type, 2);
  98       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
  99                              screen->target, context_type,
 100                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 101       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 102                            screen->target, context_type);
 103
 104       LLVMAddTypeName(screen->module, "context", context_type);
 105
 106       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 107    }
 108
 109 #ifdef DEBUG
 110    LLVMDumpModule(screen->module);
 111 #endif
 112 }
 113
 114
 115 void
 116 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 117 {
 118    if(screen->engine)
 119       LLVMDisposeExecutionEngine(screen->engine);
 120
 121    if(screen->pass)
 122       LLVMDisposePassManager(screen->pass);
 123 }
 124
 125
 126 void
 127 lp_jit_screen_init(struct llvmpipe_screen *screen)
 128 {
 129    char *error = NULL;
 130
 131    util_cpu_detect();
 132
 133 #if 0
 134    /* For simulating less capable machines */
 135    util_cpu_caps.has_sse3 = 0;
 136    util_cpu_caps.has_ssse3 = 0;
 137    util_cpu_caps.has_sse4_1 = 0;
 138 #endif
 139
 140    LLVMLinkInJIT();
 141    LLVMInitializeNativeTarget();
 142
 143    screen->module = LLVMModuleCreateWithName("llvmpipe");
 144
 145    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 146
 147    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 148       _debug_printf("%s\n", error);
 149       LLVMDisposeMessage(error);
 150       assert(0);
 151    }
 152
 153    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 154
 155    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 156    LLVMAddTargetData(screen->target, screen->pass);
 157    /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 158     * but there are more on SVN. */
 159    /* TODO: Add more passes */
 160    LLVMAddConstantPropagationPass(screen->pass);
 161    if(util_cpu_caps.has_sse4_1) {
 162       /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 163        * and sitofp (necessary for trunc/floor/ceil/round implementation)
 164        * somehow becomes invalid code.
 165        */
 166       LLVMAddInstructionCombiningPass(screen->pass);
 167    }
 168    LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 169    LLVMAddGVNPass(screen->pass);
 170    LLVMAddCFGSimplificationPass(screen->pass);
 171
 172    lp_jit_init_globals(screen);
 173 }