1 //===-- AMDGPUBaseInfo.cpp - AMDGPU Base encoding information--------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
9 #include "AMDGPUBaseInfo.h"
11 #include "llvm/IR/LLVMContext.h"
12 #include "llvm/IR/Function.h"
13 #include "llvm/IR/GlobalValue.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/MC/MCSectionELF.h"
16 #include "llvm/MC/MCSubtargetInfo.h"
17 #include "llvm/MC/SubtargetFeature.h"
19 #define GET_SUBTARGETINFO_ENUM
20 #include "AMDGPUGenSubtargetInfo.inc"
21 #undef GET_SUBTARGETINFO_ENUM
23 #define GET_REGINFO_ENUM
24 #include "AMDGPUGenRegisterInfo.inc"
25 #undef GET_REGINFO_ENUM
30 IsaVersion getIsaVersion(const FeatureBitset &Features) {
32 if (Features.test(FeatureISAVersion7_0_0))
35 if (Features.test(FeatureISAVersion7_0_1))
38 if (Features.test(FeatureISAVersion8_0_0))
41 if (Features.test(FeatureISAVersion8_0_1))
47 void initDefaultAMDKernelCodeT(amd_kernel_code_t &Header,
48 const FeatureBitset &Features) {
50 IsaVersion ISA = getIsaVersion(Features);
52 memset(&Header, 0, sizeof(Header));
54 Header.amd_kernel_code_version_major = 1;
55 Header.amd_kernel_code_version_minor = 0;
56 Header.amd_machine_kind = 1; // AMD_MACHINE_KIND_AMDGPU
57 Header.amd_machine_version_major = ISA.Major;
58 Header.amd_machine_version_minor = ISA.Minor;
59 Header.amd_machine_version_stepping = ISA.Stepping;
60 Header.kernel_code_entry_byte_offset = sizeof(Header);
61 // wavefront_size is specified as a power of 2: 2^6 = 64 threads.
62 Header.wavefront_size = 6;
63 // These alignment values are specified in powers of two, so alignment =
64 // 2^n. The minimum alignment is 2^4 = 16.
65 Header.kernarg_segment_alignment = 4;
66 Header.group_segment_alignment = 4;
67 Header.private_segment_alignment = 4;
70 MCSection *getHSATextSection(MCContext &Ctx) {
71 return Ctx.getELFSection(".hsatext", ELF::SHT_PROGBITS,
72 ELF::SHF_ALLOC | ELF::SHF_WRITE |
74 ELF::SHF_AMDGPU_HSA_AGENT |
75 ELF::SHF_AMDGPU_HSA_CODE);
78 MCSection *getHSADataGlobalAgentSection(MCContext &Ctx) {
79 return Ctx.getELFSection(".hsadata_global_agent", ELF::SHT_PROGBITS,
80 ELF::SHF_ALLOC | ELF::SHF_WRITE |
81 ELF::SHF_AMDGPU_HSA_GLOBAL |
82 ELF::SHF_AMDGPU_HSA_AGENT);
85 MCSection *getHSADataGlobalProgramSection(MCContext &Ctx) {
86 return Ctx.getELFSection(".hsadata_global_program", ELF::SHT_PROGBITS,
87 ELF::SHF_ALLOC | ELF::SHF_WRITE |
88 ELF::SHF_AMDGPU_HSA_GLOBAL);
91 MCSection *getHSARodataReadonlyAgentSection(MCContext &Ctx) {
92 return Ctx.getELFSection(".hsarodata_readonly_agent", ELF::SHT_PROGBITS,
93 ELF::SHF_ALLOC | ELF::SHF_AMDGPU_HSA_READONLY |
94 ELF::SHF_AMDGPU_HSA_AGENT);
97 bool isGroupSegment(const GlobalValue *GV) {
98 return GV->getType()->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS;
101 bool isGlobalSegment(const GlobalValue *GV) {
102 return GV->getType()->getAddressSpace() == AMDGPUAS::GLOBAL_ADDRESS;
105 bool isReadOnlySegment(const GlobalValue *GV) {
106 return GV->getType()->getAddressSpace() == AMDGPUAS::CONSTANT_ADDRESS;
109 static const char ShaderTypeAttribute[] = "ShaderType";
111 unsigned getShaderType(const Function &F) {
112 Attribute A = F.getFnAttribute(ShaderTypeAttribute);
113 unsigned ShaderType = ShaderType::COMPUTE;
115 if (A.isStringAttribute()) {
116 StringRef Str = A.getValueAsString();
117 if (Str.getAsInteger(0, ShaderType)) {
118 LLVMContext &Ctx = F.getContext();
119 Ctx.emitError("can't parse shader type");
125 bool isSI(const MCSubtargetInfo &STI) {
126 return STI.getFeatureBits()[AMDGPU::FeatureSouthernIslands];
129 bool isCI(const MCSubtargetInfo &STI) {
130 return STI.getFeatureBits()[AMDGPU::FeatureSeaIslands];
133 bool isVI(const MCSubtargetInfo &STI) {
134 return STI.getFeatureBits()[AMDGPU::FeatureVolcanicIslands];
137 unsigned getMCReg(unsigned Reg, const MCSubtargetInfo &STI) {
141 case AMDGPU::FLAT_SCR:
143 return isCI(STI) ? AMDGPU::FLAT_SCR_ci : AMDGPU::FLAT_SCR_vi;
145 case AMDGPU::FLAT_SCR_LO:
147 return isCI(STI) ? AMDGPU::FLAT_SCR_LO_ci : AMDGPU::FLAT_SCR_LO_vi;
149 case AMDGPU::FLAT_SCR_HI:
151 return isCI(STI) ? AMDGPU::FLAT_SCR_HI_ci : AMDGPU::FLAT_SCR_HI_vi;
156 } // End namespace AMDGPU
157 } // End namespace llvm