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/*
* Copyright 2011 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors: Tom Stellard <thomas.stellard@amd.com>
*
*/
#include "radeon_llvm_emit.h"
#include "radeon_elf_util.h"
#include "c11/threads.h"
#include "gallivm/lp_bld_misc.h"
#include "util/u_debug.h"
#include "util/u_memory.h"
#include "pipe/p_shader_tokens.h"
#include "pipe/p_state.h"
#include <llvm-c/Target.h>
#include <llvm-c/TargetMachine.h>
#include <llvm-c/Core.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define CPU_STRING_LEN 30
#define FS_STRING_LEN 30
#define TRIPLE_STRING_LEN 7
/**
* Shader types for the LLVM backend.
*/
enum radeon_llvm_shader_type {
RADEON_LLVM_SHADER_PS = 0,
RADEON_LLVM_SHADER_VS = 1,
RADEON_LLVM_SHADER_GS = 2,
RADEON_LLVM_SHADER_CS = 3,
};
/**
* Set the shader type we want to compile
*
* @param type shader type to set
*/
void radeon_llvm_shader_type(LLVMValueRef F, unsigned type)
{
char Str[2];
enum radeon_llvm_shader_type llvm_type;
switch (type) {
case TGSI_PROCESSOR_VERTEX:
case TGSI_PROCESSOR_TESS_CTRL:
case TGSI_PROCESSOR_TESS_EVAL:
llvm_type = RADEON_LLVM_SHADER_VS;
break;
case TGSI_PROCESSOR_GEOMETRY:
llvm_type = RADEON_LLVM_SHADER_GS;
break;
case TGSI_PROCESSOR_FRAGMENT:
llvm_type = RADEON_LLVM_SHADER_PS;
break;
case TGSI_PROCESSOR_COMPUTE:
llvm_type = RADEON_LLVM_SHADER_CS;
break;
default:
assert(0);
}
sprintf(Str, "%1d", llvm_type);
LLVMAddTargetDependentFunctionAttr(F, "ShaderType", Str);
}
static void init_r600_target()
{
gallivm_init_llvm_targets();
#if HAVE_LLVM < 0x0307
LLVMInitializeR600TargetInfo();
LLVMInitializeR600Target();
LLVMInitializeR600TargetMC();
LLVMInitializeR600AsmPrinter();
#else
LLVMInitializeAMDGPUTargetInfo();
LLVMInitializeAMDGPUTarget();
LLVMInitializeAMDGPUTargetMC();
LLVMInitializeAMDGPUAsmPrinter();
#endif
}
static once_flag init_r600_target_once_flag = ONCE_FLAG_INIT;
LLVMTargetRef radeon_llvm_get_r600_target(const char *triple)
{
LLVMTargetRef target = NULL;
char *err_message = NULL;
call_once(&init_r600_target_once_flag, init_r600_target);
if (LLVMGetTargetFromTriple(triple, &target, &err_message)) {
fprintf(stderr, "Cannot find target for triple %s ", triple);
if (err_message) {
fprintf(stderr, "%s\n", err_message);
}
LLVMDisposeMessage(err_message);
return NULL;
}
return target;
}
struct radeon_llvm_diagnostics {
struct pipe_debug_callback *debug;
unsigned retval;
};
static void radeonDiagnosticHandler(LLVMDiagnosticInfoRef di, void *context)
{
struct radeon_llvm_diagnostics *diag = (struct radeon_llvm_diagnostics *)context;
LLVMDiagnosticSeverity severity = LLVMGetDiagInfoSeverity(di);
char *description = LLVMGetDiagInfoDescription(di);
const char *severity_str = NULL;
switch (severity) {
case LLVMDSError:
severity_str = "error";
break;
case LLVMDSWarning:
severity_str = "warning";
break;
case LLVMDSRemark:
severity_str = "remark";
break;
case LLVMDSNote:
severity_str = "note";
break;
default:
severity_str = "unknown";
}
pipe_debug_message(diag->debug, SHADER_INFO,
"LLVM diagnostic (%s): %s", severity_str, description);
if (severity == LLVMDSError) {
diag->retval = 1;
fprintf(stderr,"LLVM triggered Diagnostic Handler: %s\n", description);
}
LLVMDisposeMessage(description);
}
/**
* Compile an LLVM module to machine code.
*
* @returns 0 for success, 1 for failure
*/
unsigned radeon_llvm_compile(LLVMModuleRef M, struct radeon_shader_binary *binary,
const char *gpu_family,
LLVMTargetMachineRef tm,
struct pipe_debug_callback *debug)
{
struct radeon_llvm_diagnostics diag;
char cpu[CPU_STRING_LEN];
char fs[FS_STRING_LEN];
char *err;
bool dispose_tm = false;
LLVMContextRef llvm_ctx;
LLVMMemoryBufferRef out_buffer;
unsigned buffer_size;
const char *buffer_data;
char triple[TRIPLE_STRING_LEN];
LLVMBool mem_err;
diag.debug = debug;
diag.retval = 0;
if (!tm) {
strncpy(triple, "r600--", TRIPLE_STRING_LEN);
LLVMTargetRef target = radeon_llvm_get_r600_target(triple);
if (!target) {
return 1;
}
strncpy(cpu, gpu_family, CPU_STRING_LEN);
memset(fs, 0, sizeof(fs));
strncpy(fs, "+DumpCode", FS_STRING_LEN);
tm = LLVMCreateTargetMachine(target, triple, cpu, fs,
LLVMCodeGenLevelDefault, LLVMRelocDefault,
LLVMCodeModelDefault);
dispose_tm = true;
}
/* Setup Diagnostic Handler*/
llvm_ctx = LLVMGetModuleContext(M);
LLVMContextSetDiagnosticHandler(llvm_ctx, radeonDiagnosticHandler, &diag);
/* Compile IR*/
mem_err = LLVMTargetMachineEmitToMemoryBuffer(tm, M, LLVMObjectFile, &err,
&out_buffer);
/* Process Errors/Warnings */
if (mem_err) {
fprintf(stderr, "%s: %s", __FUNCTION__, err);
pipe_debug_message(debug, SHADER_INFO,
"LLVM emit error: %s", err);
FREE(err);
diag.retval = 1;
goto out;
}
/* Extract Shader Code*/
buffer_size = LLVMGetBufferSize(out_buffer);
buffer_data = LLVMGetBufferStart(out_buffer);
radeon_elf_read(buffer_data, buffer_size, binary);
/* Clean up */
LLVMDisposeMemoryBuffer(out_buffer);
out:
if (dispose_tm) {
LLVMDisposeTargetMachine(tm);
}
if (diag.retval != 0)
pipe_debug_message(debug, SHADER_INFO, "LLVM compile failed");
return diag.retval;
}
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