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
  30 #include <llvm-c/Target.h>
  31 #include <llvm-c/TargetMachine.h>
  32 #include <llvm-c/Core.h>
  33
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37
  38 #define CPU_STRING_LEN 30
  39 #define FS_STRING_LEN 30
  40 #define TRIPLE_STRING_LEN 7
  41
  42 /**
  43  * Set the shader type we want to compile
  44  *
  45  * @param type shader type to set
  46  */
  47 void radeon_llvm_shader_type(LLVMValueRef F, unsigned type)
  48 {
  49   char Str[2];
  50   sprintf(Str, "%1d", type);
  51
  52   LLVMAddTargetDependentFunctionAttr(F, "ShaderType", Str);
  53 }
  54
  55 static void init_r600_target() {
  56         static unsigned initialized = 0;
  57         if (!initialized) {
  58                 LLVMInitializeR600TargetInfo();
  59                 LLVMInitializeR600Target();
  60                 LLVMInitializeR600TargetMC();
  61                 LLVMInitializeR600AsmPrinter();
  62                 initialized = 1;
  63         }
  64 }
  65
  66 static LLVMTargetRef get_r600_target() {
  67         LLVMTargetRef target = NULL;
  68
  69         for (target = LLVMGetFirstTarget(); target;
  70                                         target = LLVMGetNextTarget(target)) {
  71                 if (!strncmp(LLVMGetTargetName(target), "r600", 4)) {
  72                         break;
  73                 }
  74         }
  75
  76         if (!target) {
  77                 fprintf(stderr, "Can't find target r600\n");
  78                 return NULL;
  79         }
  80         return target;
  81 }
  82
  83 #if HAVE_LLVM >= 0x0305
  84
  85 static void radeonDiagnosticHandler(LLVMDiagnosticInfoRef di, void *context) {
  86         unsigned int *diagnosticflag;
  87         char *diaginfo_message;
  88
  89         diaginfo_message = LLVMGetDiagInfoDescription(di);
  90         LLVMDisposeMessage(diaginfo_message);
  91
  92         diagnosticflag = (unsigned int *)context;
  93         if (LLVMGetDiagInfoSeverity(di) == LLVMDSError) {
  94                 *diagnosticflag = 1;
  95                 fprintf(stderr,"LLVM triggered Diagnostic Handler: %s\n", diaginfo_message);
  96         }
  97 }
  98
  99 #endif
 100
 101 /**
 102  * Compile an LLVM module to machine code.
 103  *
 104  * @returns 0 for success, 1 for failure
 105  */
 106 unsigned radeon_llvm_compile(LLVMModuleRef M, struct radeon_shader_binary *binary,
 107                                           const char * gpu_family, unsigned dump) {
 108
 109         LLVMTargetRef target;
 110         LLVMTargetMachineRef tm;
 111         char cpu[CPU_STRING_LEN];
 112         char fs[FS_STRING_LEN];
 113         char *err;
 114         LLVMContextRef llvm_ctx;
 115         unsigned rval = 0;
 116         LLVMMemoryBufferRef out_buffer;
 117         unsigned buffer_size;
 118         const char *buffer_data;
 119         char triple[TRIPLE_STRING_LEN];
 120         LLVMBool mem_err;
 121
 122         /* initialise */
 123         init_r600_target();
 124
 125         target = get_r600_target();
 126         if (!target) {
 127                 return 1;
 128         }
 129
 130         strncpy(cpu, gpu_family, CPU_STRING_LEN);
 131         memset(fs, 0, sizeof(fs));
 132         if (dump) {
 133                 LLVMDumpModule(M);
 134                 strncpy(fs, "+DumpCode", FS_STRING_LEN);
 135         }
 136         strncpy(triple, "r600--", TRIPLE_STRING_LEN);
 137
 138         /* Setup Diagnostic Handler*/
 139         llvm_ctx = LLVMGetModuleContext(M);
 140
 141 #if HAVE_LLVM >= 0x0305
 142         LLVMContextSetDiagnosticHandler(llvm_ctx, radeonDiagnosticHandler, &rval);
 143 #endif
 144         rval = 0;
 145
 146         /* Compile IR*/
 147         tm = LLVMCreateTargetMachine(target, triple, cpu, fs,
 148                                   LLVMCodeGenLevelDefault, LLVMRelocDefault,
 149                                                   LLVMCodeModelDefault);
 150         mem_err = LLVMTargetMachineEmitToMemoryBuffer(tm, M, LLVMObjectFile, &err,
 151                                                                  &out_buffer);
 152
 153         /* Process Errors/Warnings */
 154         if (mem_err) {
 155                 fprintf(stderr, "%s: %s", __FUNCTION__, err);
 156                 FREE(err);
 157                 LLVMDisposeTargetMachine(tm);
 158                 return 1;
 159         }
 160
 161         if (0 != rval) {
 162                 fprintf(stderr, "%s: Processing Diag Flag\n", __FUNCTION__);
 163         }
 164
 165         /* Extract Shader Code*/
 166         buffer_size = LLVMGetBufferSize(out_buffer);
 167         buffer_data = LLVMGetBufferStart(out_buffer);
 168
 169         radeon_elf_read(buffer_data, buffer_size, binary, dump);
 170
 171         /* Clean up */
 172         LLVMDisposeMemoryBuffer(out_buffer);
 173         LLVMDisposeTargetMachine(tm);
 174         return rval;
 175 }