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 "c11/threads.h"
  29 #include "gallivm/lp_bld_misc.h"
  30 #include "util/u_memory.h"
  31 #include "pipe/p_shader_tokens.h"
  32
  33 #include <llvm-c/Target.h>
  34 #include <llvm-c/TargetMachine.h>
  35 #include <llvm-c/Core.h>
  36
  37 #include <stdlib.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40
  41 #define CPU_STRING_LEN 30
  42 #define FS_STRING_LEN 30
  43 #define TRIPLE_STRING_LEN 7
  44
  45 /**
  46  * Shader types for the LLVM backend.
  47  */
  48 enum radeon_llvm_shader_type {
  49         RADEON_LLVM_SHADER_PS = 0,
  50         RADEON_LLVM_SHADER_VS = 1,
  51         RADEON_LLVM_SHADER_GS = 2,
  52         RADEON_LLVM_SHADER_CS = 3,
  53 };
  54
  55 /**
  56  * Set the shader type we want to compile
  57  *
  58  * @param type shader type to set
  59  */
  60 void radeon_llvm_shader_type(LLVMValueRef F, unsigned type)
  61 {
  62         char Str[2];
  63         enum radeon_llvm_shader_type llvm_type;
  64
  65         switch (type) {
  66         case TGSI_PROCESSOR_VERTEX:
  67         case TGSI_PROCESSOR_TESS_CTRL:
  68         case TGSI_PROCESSOR_TESS_EVAL:
  69                 llvm_type = RADEON_LLVM_SHADER_VS;
  70                 break;
  71         case TGSI_PROCESSOR_GEOMETRY:
  72                 llvm_type = RADEON_LLVM_SHADER_GS;
  73                 break;
  74         case TGSI_PROCESSOR_FRAGMENT:
  75                 llvm_type = RADEON_LLVM_SHADER_PS;
  76                 break;
  77         case TGSI_PROCESSOR_COMPUTE:
  78                 llvm_type = RADEON_LLVM_SHADER_CS;
  79                 break;
  80         default:
  81                 assert(0);
  82         }
  83
  84         sprintf(Str, "%1d", llvm_type);
  85
  86         LLVMAddTargetDependentFunctionAttr(F, "ShaderType", Str);
  87 }
  88
  89 static void init_r600_target()
  90 {
  91         gallivm_init_llvm_targets();
  92 #if HAVE_LLVM < 0x0307
  93         LLVMInitializeR600TargetInfo();
  94         LLVMInitializeR600Target();
  95         LLVMInitializeR600TargetMC();
  96         LLVMInitializeR600AsmPrinter();
  97 #else
  98         LLVMInitializeAMDGPUTargetInfo();
  99         LLVMInitializeAMDGPUTarget();
 100         LLVMInitializeAMDGPUTargetMC();
 101         LLVMInitializeAMDGPUAsmPrinter();
 102
 103 #endif
 104 }
 105
 106 static once_flag init_r600_target_once_flag = ONCE_FLAG_INIT;
 107
 108 LLVMTargetRef radeon_llvm_get_r600_target(const char *triple)
 109 {
 110         LLVMTargetRef target = NULL;
 111         char *err_message = NULL;
 112
 113         call_once(&init_r600_target_once_flag, init_r600_target);
 114
 115         if (LLVMGetTargetFromTriple(triple, &target, &err_message)) {
 116                 fprintf(stderr, "Cannot find target for triple %s ", triple);
 117                 if (err_message) {
 118                         fprintf(stderr, "%s\n", err_message);
 119                 }
 120                 LLVMDisposeMessage(err_message);
 121                 return NULL;
 122         }
 123         return target;
 124 }
 125
 126 static void radeonDiagnosticHandler(LLVMDiagnosticInfoRef di, void *context)
 127 {
 128         if (LLVMGetDiagInfoSeverity(di) == LLVMDSError) {
 129                 unsigned int *diagnosticflag = (unsigned int *)context;
 130                 char *diaginfo_message = LLVMGetDiagInfoDescription(di);
 131
 132                 *diagnosticflag = 1;
 133                 fprintf(stderr,"LLVM triggered Diagnostic Handler: %s\n", diaginfo_message);
 134                 LLVMDisposeMessage(diaginfo_message);
 135         }
 136 }
 137
 138 /**
 139  * Compile an LLVM module to machine code.
 140  *
 141  * @returns 0 for success, 1 for failure
 142  */
 143 unsigned radeon_llvm_compile(LLVMModuleRef M, struct radeon_shader_binary *binary,
 144                              const char *gpu_family, bool dump_ir, bool dump_asm,
 145                              LLVMTargetMachineRef tm)
 146 {
 147
 148         char cpu[CPU_STRING_LEN];
 149         char fs[FS_STRING_LEN];
 150         char *err;
 151         bool dispose_tm = false;
 152         LLVMContextRef llvm_ctx;
 153         unsigned rval = 0;
 154         LLVMMemoryBufferRef out_buffer;
 155         unsigned buffer_size;
 156         const char *buffer_data;
 157         char triple[TRIPLE_STRING_LEN];
 158         LLVMBool mem_err;
 159
 160         if (!tm) {
 161                 strncpy(triple, "r600--", TRIPLE_STRING_LEN);
 162                 LLVMTargetRef target = radeon_llvm_get_r600_target(triple);
 163                 if (!target) {
 164                         return 1;
 165                 }
 166                 strncpy(cpu, gpu_family, CPU_STRING_LEN);
 167                 memset(fs, 0, sizeof(fs));
 168                 if (dump_asm)
 169                         strncpy(fs, "+DumpCode", FS_STRING_LEN);
 170                 tm = LLVMCreateTargetMachine(target, triple, cpu, fs,
 171                                   LLVMCodeGenLevelDefault, LLVMRelocDefault,
 172                                                   LLVMCodeModelDefault);
 173                 dispose_tm = true;
 174         }
 175         if (dump_ir)
 176                 LLVMDumpModule(M);
 177         /* Setup Diagnostic Handler*/
 178         llvm_ctx = LLVMGetModuleContext(M);
 179
 180         LLVMContextSetDiagnosticHandler(llvm_ctx, radeonDiagnosticHandler, &rval);
 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);
 204
 205         /* Clean up */
 206         LLVMDisposeMemoryBuffer(out_buffer);
 207
 208         if (dispose_tm) {
 209                 LLVMDisposeTargetMachine(tm);
 210         }
 211         return rval;
 212 }