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_debug.h"
  41 #include "lp_screen.h"
  42 #include "lp_bld_intr.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[8];
  83       LLVMTypeRef context_type;
  84
  85       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  86       elem_types[1] = LLVMFloatType();                     /* alpha_ref_value */      elem_types[2] = LLVMFloatType();                     /* scissor_xmin */
  87       elem_types[3] = LLVMFloatType();                     /* scissor_ymin */
  88       elem_types[4] = LLVMFloatType();                     /* scissor_xmax */
  89       elem_types[5] = LLVMFloatType();                     /* scissor_ymax */
  90       elem_types[6] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
  91       elem_types[7] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
  92
  93       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  94
  95       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
  96                              screen->target, context_type, 0);
  97       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
  98                              screen->target, context_type, 1);
  99       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmin,
 100                              screen->target, context_type, 2);
 101       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymin,
 102                              screen->target, context_type, 3);
 103       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmax,
 104                              screen->target, context_type, 4);
 105       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymax,
 106                              screen->target, context_type, 5);
 107       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
 108                              screen->target, context_type, 6);
 109       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
 110                              screen->target, context_type,
 111                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 112       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 113                            screen->target, context_type);
 114
 115       LLVMAddTypeName(screen->module, "context", context_type);
 116
 117       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 118    }
 119
 120 #ifdef DEBUG
 121    LLVMDumpModule(screen->module);
 122 #endif
 123 }
 124
 125
 126 void
 127 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 128 {
 129    if(screen->engine)
 130       LLVMDisposeExecutionEngine(screen->engine);
 131
 132    if(screen->pass)
 133       LLVMDisposePassManager(screen->pass);
 134 }
 135
 136
 137 void
 138 lp_jit_screen_init(struct llvmpipe_screen *screen)
 139 {
 140    char *error = NULL;
 141
 142    util_cpu_detect();
 143
 144 #if 0
 145    /* For simulating less capable machines */
 146    util_cpu_caps.has_sse3 = 0;
 147    util_cpu_caps.has_ssse3 = 0;
 148    util_cpu_caps.has_sse4_1 = 0;
 149 #endif
 150
 151    LLVMLinkInJIT();
 152    LLVMInitializeNativeTarget();
 153
 154    screen->module = LLVMModuleCreateWithName("llvmpipe");
 155
 156    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 157
 158    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 159       _debug_printf("%s\n", error);
 160       LLVMDisposeMessage(error);
 161       assert(0);
 162    }
 163
 164    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 165
 166    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 167    LLVMAddTargetData(screen->target, screen->pass);
 168
 169    if ((LP_DEBUG & DEBUG_NO_LLVM_OPT) == 0) {
 170       /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 171        * but there are more on SVN. */
 172       /* TODO: Add more passes */
 173       LLVMAddConstantPropagationPass(screen->pass);
 174       if(util_cpu_caps.has_sse4_1) {
 175          /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 176           * and sitofp (necessary for trunc/floor/ceil/round implementation)
 177           * somehow becomes invalid code.
 178           */
 179          LLVMAddInstructionCombiningPass(screen->pass);
 180       }
 181       LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 182       LLVMAddGVNPass(screen->pass);
 183       LLVMAddCFGSimplificationPass(screen->pass);
 184    }
 185
 186    lp_jit_init_globals(screen);
 187 }