src/gallium/drivers/llvmpipe/lp_jit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
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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
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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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 "gallivm/lp_bld_init.h"
  41 #include "gallivm/lp_bld_debug.h"
  42 #include "lp_screen.h"
  43 #include "gallivm/lp_bld_intr.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[LP_JIT_TEXTURE_NUM_FIELDS];
  55
  56       elem_types[LP_JIT_TEXTURE_WIDTH]  = LLVMInt32Type();
  57       elem_types[LP_JIT_TEXTURE_HEIGHT] = LLVMInt32Type();
  58       elem_types[LP_JIT_TEXTURE_DEPTH] = LLVMInt32Type();
  59       elem_types[LP_JIT_TEXTURE_LAST_LEVEL] = LLVMInt32Type();
  60       elem_types[LP_JIT_TEXTURE_ROW_STRIDE] =
  61          LLVMArrayType(LLVMInt32Type(), LP_MAX_TEXTURE_LEVELS);
  62       elem_types[LP_JIT_TEXTURE_IMG_STRIDE] =
  63          LLVMArrayType(LLVMInt32Type(), LP_MAX_TEXTURE_LEVELS);
  64       elem_types[LP_JIT_TEXTURE_DATA] =
  65          LLVMArrayType(LLVMPointerType(LLVMInt8Type(), 0),
  66                        LP_MAX_TEXTURE_LEVELS);
  67
  68       texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  69
  70       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, width,
  71                              screen->target, texture_type,
  72                              LP_JIT_TEXTURE_WIDTH);
  73       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, height,
  74                              screen->target, texture_type,
  75                              LP_JIT_TEXTURE_HEIGHT);
  76       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, depth,
  77                              screen->target, texture_type,
  78                              LP_JIT_TEXTURE_DEPTH);
  79       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, last_level,
  80                              screen->target, texture_type,
  81                              LP_JIT_TEXTURE_LAST_LEVEL);
  82       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, row_stride,
  83                              screen->target, texture_type,
  84                              LP_JIT_TEXTURE_ROW_STRIDE);
  85       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, img_stride,
  86                              screen->target, texture_type,
  87                              LP_JIT_TEXTURE_IMG_STRIDE);
  88       LP_CHECK_MEMBER_OFFSET(struct lp_jit_texture, data,
  89                              screen->target, texture_type,
  90                              LP_JIT_TEXTURE_DATA);
  91       LP_CHECK_STRUCT_SIZE(struct lp_jit_texture,
  92                            screen->target, texture_type);
  93
  94       LLVMAddTypeName(screen->module, "texture", texture_type);
  95    }
  96
  97    /* struct lp_jit_context */
  98    {
  99       LLVMTypeRef elem_types[LP_JIT_CTX_COUNT];
 100       LLVMTypeRef context_type;
 101
 102       elem_types[LP_JIT_CTX_CONSTANTS] = LLVMPointerType(LLVMFloatType(), 0);
 103       elem_types[LP_JIT_CTX_ALPHA_REF] = LLVMFloatType();
 104       elem_types[LP_JIT_CTX_STENCIL_REF_FRONT] = LLVMInt32Type();
 105       elem_types[LP_JIT_CTX_STENCIL_REF_BACK] = LLVMInt32Type();
 106       elem_types[LP_JIT_CTX_BLEND_COLOR] = LLVMPointerType(LLVMInt8Type(), 0);
 107       elem_types[LP_JIT_CTX_TEXTURES] = LLVMArrayType(texture_type,
 108                                                       PIPE_MAX_SAMPLERS);
 109
 110       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
 111
 112       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
 113                              screen->target, context_type,
 114                              LP_JIT_CTX_CONSTANTS);
 115       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, alpha_ref_value,
 116                              screen->target, context_type,
 117                              LP_JIT_CTX_ALPHA_REF);
 118       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, stencil_ref_front,
 119                              screen->target, context_type,
 120                              LP_JIT_CTX_STENCIL_REF_FRONT);
 121       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, stencil_ref_back,
 122                              screen->target, context_type,
 123                              LP_JIT_CTX_STENCIL_REF_BACK);
 124       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, blend_color,
 125                              screen->target, context_type,
 126                              LP_JIT_CTX_BLEND_COLOR);
 127       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, textures,
 128                              screen->target, context_type,
 129                              LP_JIT_CTX_TEXTURES);
 130       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
 131                            screen->target, context_type);
 132
 133       LLVMAddTypeName(screen->module, "context", context_type);
 134
 135       screen->context_ptr_type = LLVMPointerType(context_type, 0);
 136    }
 137
 138    if (gallivm_debug & GALLIVM_DEBUG_IR) {
 139       LLVMDumpModule(screen->module);
 140    }
 141 }
 142
 143
 144 void
 145 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
 146 {
 147    if(screen->engine)
 148       LLVMDisposeExecutionEngine(screen->engine);
 149
 150    if(screen->pass)
 151       LLVMDisposePassManager(screen->pass);
 152 }
 153
 154
 155 void
 156 lp_jit_screen_init(struct llvmpipe_screen *screen)
 157 {
 158    lp_build_init();
 159
 160    screen->module = lp_build_module;
 161    screen->provider = lp_build_provider;
 162    screen->engine = lp_build_engine;
 163    screen->target = lp_build_target;
 164
 165    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 166    LLVMAddTargetData(screen->target, screen->pass);
 167
 168    if ((gallivm_debug & GALLIVM_DEBUG_NO_OPT) == 0) {
 169       /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 170        * but there are more on SVN. */
 171       /* TODO: Add more passes */
 172       LLVMAddCFGSimplificationPass(screen->pass);
 173       LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 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       LLVMAddGVNPass(screen->pass);
 183    } else {
 184       /* We need at least this pass to prevent the backends to fail in
 185        * unexpected ways.
 186        */
 187       LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 188    }
 189
 190    lp_jit_init_globals(screen);
 191 }