src/gallium/drivers/radeon/radeon_llvm_emit.c

   1 /*
   2  * Copyright 2011 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors: Tom Stellard <thomas.stellard@amd.com>
  24  *
  25  */
  26 #include "radeon_llvm_emit.h"
  27 #include "radeon_elf_util.h"
  28 #include "util/u_memory.h"
  29 #include "pipe/p_shader_tokens.h"
  30
  31 #include <llvm-c/Target.h>
  32 #include <llvm-c/TargetMachine.h>
  33 #include <llvm-c/Core.h>
  34
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38
  39 #define CPU_STRING_LEN 30
  40 #define FS_STRING_LEN 30
  41 #define TRIPLE_STRING_LEN 7
  42
  43 /**
  44  * Shader types for the LLVM backend.
  45  */
  46 enum radeon_llvm_shader_type {
  47         RADEON_LLVM_SHADER_PS = 0,
  48         RADEON_LLVM_SHADER_VS = 1,
  49         RADEON_LLVM_SHADER_GS = 2,
  50         RADEON_LLVM_SHADER_CS = 3,
  51 };
  52
  53 /**
  54  * Set the shader type we want to compile
  55  *
  56  * @param type shader type to set
  57  */
  58 void radeon_llvm_shader_type(LLVMValueRef F, unsigned type)
  59 {
  60         char Str[2];
  61         enum radeon_llvm_shader_type llvm_type;
  62
  63         switch (type) {
  64         case TGSI_PROCESSOR_VERTEX:
  65                 llvm_type = RADEON_LLVM_SHADER_VS;
  66                 break;
  67         case TGSI_PROCESSOR_GEOMETRY:
  68                 llvm_type = RADEON_LLVM_SHADER_GS;
  69                 break;
  70         case TGSI_PROCESSOR_FRAGMENT:
  71                 llvm_type = RADEON_LLVM_SHADER_PS;
  72                 break;
  73         case TGSI_PROCESSOR_COMPUTE:
  74                 llvm_type = RADEON_LLVM_SHADER_CS;
  75                 break;
  76         default:
  77                 assert(0);
  78         }
  79
  80         sprintf(Str, "%1d", llvm_type);
  81
  82         LLVMAddTargetDependentFunctionAttr(F, "ShaderType", Str);
  83 }
  84
  85 static void init_r600_target()
  86 {
  87         static unsigned initialized = 0;
  88         if (!initialized) {
  89                 LLVMInitializeR600TargetInfo();
  90                 LLVMInitializeR600Target();
  91                 LLVMInitializeR600TargetMC();
  92                 LLVMInitializeR600AsmPrinter();
  93                 initialized = 1;
  94         }
  95 }
  96
  97 LLVMTargetRef radeon_llvm_get_r600_target(const char *triple)
  98 {
  99         LLVMTargetRef target = NULL;
 100         char *err_message = NULL;
 101
 102         init_r600_target();
 103
 104         if (LLVMGetTargetFromTriple(triple, &target, &err_message)) {
 105                 fprintf(stderr, "Cannot find target for triple %s ", triple);
 106                 if (err_message) {
 107                         fprintf(stderr, "%s\n", err_message);
 108                 }
 109                 LLVMDisposeMessage(err_message);
 110                 return NULL;
 111         }
 112         return target;
 113 }
 114
 115 #if HAVE_LLVM >= 0x0305
 116
 117 static void radeonDiagnosticHandler(LLVMDiagnosticInfoRef di, void *context)
 118 {
 119         if (LLVMGetDiagInfoSeverity(di) == LLVMDSError) {
 120                 unsigned int *diagnosticflag = (unsigned int *)context;
 121                 char *diaginfo_message = LLVMGetDiagInfoDescription(di);
 122
 123                 *diagnosticflag = 1;
 124                 fprintf(stderr,"LLVM triggered Diagnostic Handler: %s\n", diaginfo_message);
 125                 LLVMDisposeMessage(diaginfo_message);
 126         }
 127 }
 128
 129 #endif
 130
 131 /**
 132  * Compile an LLVM module to machine code.
 133  *
 134  * @returns 0 for success, 1 for failure
 135  */
 136 unsigned radeon_llvm_compile(LLVMModuleRef M, struct radeon_shader_binary *binary,
 137                           const char *gpu_family, unsigned dump, LLVMTargetMachineRef tm)
 138 {
 139
 140         char cpu[CPU_STRING_LEN];
 141         char fs[FS_STRING_LEN];
 142         char *err;
 143         bool dispose_tm = false;
 144         LLVMContextRef llvm_ctx;
 145         unsigned rval = 0;
 146         LLVMMemoryBufferRef out_buffer;
 147         unsigned buffer_size;
 148         const char *buffer_data;
 149         char triple[TRIPLE_STRING_LEN];
 150         LLVMBool mem_err;
 151
 152         if (!tm) {
 153                 strncpy(triple, "r600--", TRIPLE_STRING_LEN);
 154                 LLVMTargetRef target = radeon_llvm_get_r600_target(triple);
 155                 if (!target) {
 156                         return 1;
 157                 }
 158                 strncpy(cpu, gpu_family, CPU_STRING_LEN);
 159                 memset(fs, 0, sizeof(fs));
 160                 if (dump) {
 161                         strncpy(fs, "+DumpCode", FS_STRING_LEN);
 162                 }
 163                 tm = LLVMCreateTargetMachine(target, triple, cpu, fs,
 164                                   LLVMCodeGenLevelDefault, LLVMRelocDefault,
 165                                                   LLVMCodeModelDefault);
 166                 dispose_tm = true;
 167         }
 168         if (dump) {
 169                 LLVMDumpModule(M);
 170         }
 171         /* Setup Diagnostic Handler*/
 172         llvm_ctx = LLVMGetModuleContext(M);
 173
 174 #if HAVE_LLVM >= 0x0305
 175         LLVMContextSetDiagnosticHandler(llvm_ctx, radeonDiagnosticHandler, &rval);
 176 #endif
 177         rval = 0;
 178
 179         /* Compile IR*/
 180         mem_err = LLVMTargetMachineEmitToMemoryBuffer(tm, M, LLVMObjectFile, &err,
 181                                                                  &out_buffer);
 182
 183         /* Process Errors/Warnings */
 184         if (mem_err) {
 185                 fprintf(stderr, "%s: %s", __FUNCTION__, err);
 186                 FREE(err);
 187                 LLVMDisposeTargetMachine(tm);
 188                 return 1;
 189         }
 190
 191         if (0 != rval) {
 192                 fprintf(stderr, "%s: Processing Diag Flag\n", __FUNCTION__);
 193         }
 194
 195         /* Extract Shader Code*/
 196         buffer_size = LLVMGetBufferSize(out_buffer);
 197         buffer_data = LLVMGetBufferStart(out_buffer);
 198
 199         radeon_elf_read(buffer_data, buffer_size, binary, dump);
 200
 201         /* Clean up */
 202         LLVMDisposeMemoryBuffer(out_buffer);
 203
 204         if (dispose_tm) {
 205                 LLVMDisposeTargetMachine(tm);
 206         }
 207         return rval;
 208 }