1 //===-- AMDGPUBaseInfo.cpp - AMDGPU Base encoding information--------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 #include "AMDGPUBaseInfo.h"
10 #include "llvm/MC/SubtargetFeature.h"
11
12 #define GET_SUBTARGETINFO_ENUM
13 #include "AMDGPUGenSubtargetInfo.inc"
14 #undef GET_SUBTARGETINFO_ENUM
15
16 namespace llvm {
17 namespace AMDGPU {
18
getIsaVersion(const FeatureBitset & Features)19 IsaVersion getIsaVersion(const FeatureBitset &Features) {
20
21 if (Features.test(FeatureISAVersion7_0_0))
22 return {7, 0, 0};
23
24 if (Features.test(FeatureISAVersion7_0_1))
25 return {7, 0, 1};
26
27 if (Features.test(FeatureISAVersion8_0_0))
28 return {8, 0, 0};
29
30 if (Features.test(FeatureISAVersion8_0_1))
31 return {8, 0, 1};
32
33 return {0, 0, 0};
34 }
35
initDefaultAMDKernelCodeT(amd_kernel_code_t & Header,const FeatureBitset & Features)36 void initDefaultAMDKernelCodeT(amd_kernel_code_t &Header,
37 const FeatureBitset &Features) {
38
39 IsaVersion ISA = getIsaVersion(Features);
40
41 memset(&Header, 0, sizeof(Header));
42
43 Header.amd_kernel_code_version_major = 1;
44 Header.amd_kernel_code_version_minor = 0;
45 Header.amd_machine_kind = 1; // AMD_MACHINE_KIND_AMDGPU
46 Header.amd_machine_version_major = ISA.Major;
47 Header.amd_machine_version_minor = ISA.Minor;
48 Header.amd_machine_version_stepping = ISA.Stepping;
49 Header.kernel_code_entry_byte_offset = sizeof(Header);
50 // wavefront_size is specified as a power of 2: 2^6 = 64 threads.
51 Header.wavefront_size = 6;
52 // These alignment values are specified in powers of two, so alignment =
53 // 2^n. The minimum alignment is 2^4 = 16.
54 Header.kernarg_segment_alignment = 4;
55 Header.group_segment_alignment = 4;
56 Header.private_segment_alignment = 4;
57 }
58
59 } // End namespace AMDGPU
60 } // End namespace llvm
61