src/gallium/drivers/llvmpipe/lp_jit.c

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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_bld_misc.h"
  44 #include "lp_jit.h"
  45
  46
  47 static void
  48 lp_jit_init_globals(struct llvmpipe_screen *screen)
  49 {
  50    LLVMTypeRef texture_type;
  51
  52    /* struct lp_jit_texture */
  53    {
  54       LLVMTypeRef elem_types[4];
  55
  56       elem_types[LP_JIT_TEXTURE_WIDTH]  = LLVMInt32Type();
  57       elem_types[LP_JIT_TEXTURE_HEIGHT] = LLVMInt32Type();
  58       elem_types[LP_JIT_TEXTURE_STRIDE] = LLVMInt32Type();
  59       elem_types[LP_JIT_TEXTURE_DATA]   = LLVMPointerType(LLVMInt8Type(), 0);
  60
  61       texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  62
  63       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, width,
  64                              screen->target, texture_type,
  65                              LP_JIT_TEXTURE_WIDTH);
  66       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, height,
  67                              screen->target, texture_type,
  68                              LP_JIT_TEXTURE_HEIGHT);
  69       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, stride,
  70                              screen->target, texture_type,
  71                              LP_JIT_TEXTURE_STRIDE);
  72       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, data,
  73                              screen->target, texture_type,
  74                              LP_JIT_TEXTURE_DATA);
  75       LP_CHECK_STRUCT_SIZE(struct lp_jit_texture,
  76                            screen->target, texture_type);
  77
  78       LLVMAddTypeName(screen->module, "texture", texture_type);
  79    }
  80
  81    /* struct lp_jit_context */
  82    {
  83       LLVMTypeRef elem_types[8];
  84       LLVMTypeRef context_type;
  85
  86       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  87       elem_types[1] = LLVMFloatType();                     /* alpha_ref_value */      elem_types[2] = LLVMFloatType();                     /* scissor_xmin */
  88       elem_types[3] = LLVMFloatType();                     /* scissor_ymin */
  89       elem_types[4] = LLVMFloatType();                     /* scissor_xmax */
  90       elem_types[5] = LLVMFloatType();                     /* scissor_ymax */
  91       elem_types[6] = LLVMPointerType(LLVMInt8Type(), 0);  /* blend_color */
  92       elem_types[7] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
  93
  94       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  95
  96       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
  97                              screen->target, context_type, 0);
  98       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
  99                              screen->target, context_type, 1);
 100       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmin,
 101                              screen->target, context_type, 2);
 102       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymin,
 103                              screen->target, context_type, 3);
 104       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_xmax,
 105                              screen->target, context_type, 4);
 106       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, scissor_ymax,
 107                              screen->target, context_type, 5);
 108       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
 109                              screen->target, context_type, 6);
 110       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
 111                              screen->target, context_type,
 112                              LP_JIT_CONTEXT_TEXTURES_INDEX);
 113       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 114                            screen->target, context_type);
 115
 116       LLVMAddTypeName(screen->module, "context", context_type);
 117
 118       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 119    }
 120
 121 #ifdef DEBUG
 122    LLVMDumpModule(screen->module);
 123 #endif
 124 }
 125
 126
 127 void
 128 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 129 {
 130    if(screen->engine)
 131       LLVMDisposeExecutionEngine(screen->engine);
 132
 133    if(screen->pass)
 134       LLVMDisposePassManager(screen->pass);
 135 }
 136
 137
 138 void
 139 lp_jit_screen_init(struct llvmpipe_screen *screen)
 140 {
 141    char *error = NULL;
 142
 143    util_cpu_detect();
 144
 145 #if 0
 146    /* For simulating less capable machines */
 147    util_cpu_caps.has_sse3 = 0;
 148    util_cpu_caps.has_ssse3 = 0;
 149    util_cpu_caps.has_sse4_1 = 0;
 150 #endif
 151
 152    LLVMLinkInJIT();
 153    LLVMInitializeNativeTarget();
 154
 155    screen->module = LLVMModuleCreateWithName("llvmpipe");
 156
 157    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 158
 159    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 160       _debug_printf("%s\n", error);
 161       LLVMDisposeMessage(error);
 162       assert(0);
 163    }
 164
 165    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 166
 167    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 168    LLVMAddTargetData(screen->target, screen->pass);
 169
 170    if ((LP_DEBUG & DEBUG_NO_LLVM_OPT) == 0) {
 171       /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 172        * but there are more on SVN. */
 173       /* TODO: Add more passes */
 174       LLVMAddConstantPropagationPass(screen->pass);
 175       if(util_cpu_caps.has_sse4_1) {
 176          /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 177           * and sitofp (necessary for trunc/floor/ceil/round implementation)
 178           * somehow becomes invalid code.
 179           */
 180          LLVMAddInstructionCombiningPass(screen->pass);
 181       }
 182       LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 183       LLVMAddGVNPass(screen->pass);
 184       LLVMAddCFGSimplificationPass(screen->pass);
 185    }
 186
 187    lp_jit_init_globals(screen);
 188 }