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         if (type != TGSI_PROCESSOR_COMPUTE) {
  85                 LLVMAddTargetDependentFunctionAttr(F, "unsafe-fp-math", "true");
  86         }
  87 }
  88
  89 static void init_r600_target()
  90 {
  91         static unsigned initialized = 0;
  92         if (!initialized) {
  93                 LLVMInitializeR600TargetInfo();
  94                 LLVMInitializeR600Target();
  95                 LLVMInitializeR600TargetMC();
  96                 LLVMInitializeR600AsmPrinter();
  97                 initialized = 1;
  98         }
  99 }
 100
 101 LLVMTargetRef radeon_llvm_get_r600_target(const char *triple)
 102 {
 103         LLVMTargetRef target = NULL;
 104         char *err_message = NULL;
 105
 106         init_r600_target();
 107
 108         if (LLVMGetTargetFromTriple(triple, &target, &err_message)) {
 109                 fprintf(stderr, "Cannot find target for triple %s ", triple);
 110                 if (err_message) {
 111                         fprintf(stderr, "%s\n", err_message);
 112                 }
 113                 LLVMDisposeMessage(err_message);
 114                 return NULL;
 115         }
 116         return target;
 117 }
 118
 119 #if HAVE_LLVM >= 0x0305
 120
 121 static void radeonDiagnosticHandler(LLVMDiagnosticInfoRef di, void *context)
 122 {
 123         if (LLVMGetDiagInfoSeverity(di) == LLVMDSError) {
 124                 unsigned int *diagnosticflag = (unsigned int *)context;
 125                 char *diaginfo_message = LLVMGetDiagInfoDescription(di);
 126
 127                 *diagnosticflag = 1;
 128                 fprintf(stderr,"LLVM triggered Diagnostic Handler: %s\n", diaginfo_message);
 129                 LLVMDisposeMessage(diaginfo_message);
 130         }
 131 }
 132
 133 #endif
 134
 135 /**
 136  * Compile an LLVM module to machine code.
 137  *
 138  * @returns 0 for success, 1 for failure
 139  */
 140 unsigned radeon_llvm_compile(LLVMModuleRef M, struct radeon_shader_binary *binary,
 141                           const char *gpu_family, unsigned dump, LLVMTargetMachineRef tm)
 142 {
 143
 144         char cpu[CPU_STRING_LEN];
 145         char fs[FS_STRING_LEN];
 146         char *err;
 147         bool dispose_tm = false;
 148         LLVMContextRef llvm_ctx;
 149         unsigned rval = 0;
 150         LLVMMemoryBufferRef out_buffer;
 151         unsigned buffer_size;
 152         const char *buffer_data;
 153         char triple[TRIPLE_STRING_LEN];
 154         LLVMBool mem_err;
 155
 156         if (!tm) {
 157                 strncpy(triple, "r600--", TRIPLE_STRING_LEN);
 158                 LLVMTargetRef target = radeon_llvm_get_r600_target(triple);
 159                 if (!target) {
 160                         return 1;
 161                 }
 162                 strncpy(cpu, gpu_family, CPU_STRING_LEN);
 163                 memset(fs, 0, sizeof(fs));
 164                 if (dump) {
 165                         strncpy(fs, "+DumpCode", FS_STRING_LEN);
 166                 }
 167                 tm = LLVMCreateTargetMachine(target, triple, cpu, fs,
 168                                   LLVMCodeGenLevelDefault, LLVMRelocDefault,
 169                                                   LLVMCodeModelDefault);
 170                 dispose_tm = true;
 171         }
 172         if (dump) {
 173                 LLVMDumpModule(M);
 174         }
 175         /* Setup Diagnostic Handler*/
 176         llvm_ctx = LLVMGetModuleContext(M);
 177
 178 #if HAVE_LLVM >= 0x0305
 179         LLVMContextSetDiagnosticHandler(llvm_ctx, radeonDiagnosticHandler, &rval);
 180 #endif
 181         rval = 0;
 182
 183         /* Compile IR*/
 184         mem_err = LLVMTargetMachineEmitToMemoryBuffer(tm, M, LLVMObjectFile, &err,
 185                                                                  &out_buffer);
 186
 187         /* Process Errors/Warnings */
 188         if (mem_err) {
 189                 fprintf(stderr, "%s: %s", __FUNCTION__, err);
 190                 FREE(err);
 191                 LLVMDisposeTargetMachine(tm);
 192                 return 1;
 193         }
 194
 195         if (0 != rval) {
 196                 fprintf(stderr, "%s: Processing Diag Flag\n", __FUNCTION__);
 197         }
 198
 199         /* Extract Shader Code*/
 200         buffer_size = LLVMGetBufferSize(out_buffer);
 201         buffer_data = LLVMGetBufferStart(out_buffer);
 202
 203         radeon_elf_read(buffer_data, buffer_size, binary, dump);
 204
 205         /* Clean up */
 206         LLVMDisposeMemoryBuffer(out_buffer);
 207
 208         if (dispose_tm) {
 209                 LLVMDisposeTargetMachine(tm);
 210         }
 211         return rval;
 212 }