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llvm-mirror/lib/Support/TargetParser.cpp
Alexandros Lamprineas 873b41a931 - Added support for parsing HWDiv features using Target Parser. 
- Architecture extensions are represented as a bitmap.

Phabricator: http://reviews.llvm.org/D11457
llvm-svn: 243335
2015-07-27 22:26:59 +00:00

672 lines
25 KiB
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//===-- TargetParser - Parser for target features ---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements a target parser to recognise hardware features such as
// FPU/CPU/ARCH names as well as specific support such as HDIV, etc.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/ARMBuildAttributes.h"
#include "llvm/Support/TargetParser.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include <cctype>
using namespace llvm;
namespace {
// List of canonical FPU names (use getFPUSynonym) and which architectural
// features they correspond to (use getFPUFeatures).
// FIXME: TableGen this.
// The entries must appear in the order listed in ARM::FPUKind for correct indexing
struct {
const char * Name;
ARM::FPUKind ID;
ARM::FPUVersion FPUVersion;
ARM::NeonSupportLevel NeonSupport;
ARM::FPURestriction Restriction;
} FPUNames[] = {
{ "invalid", ARM::FK_INVALID, ARM::FV_NONE, ARM::NS_None, ARM::FR_None},
{ "none", ARM::FK_NONE, ARM::FV_NONE, ARM::NS_None, ARM::FR_None},
{ "vfp", ARM::FK_VFP, ARM::FV_VFPV2, ARM::NS_None, ARM::FR_None},
{ "vfpv2", ARM::FK_VFPV2, ARM::FV_VFPV2, ARM::NS_None, ARM::FR_None},
{ "vfpv3", ARM::FK_VFPV3, ARM::FV_VFPV3, ARM::NS_None, ARM::FR_None},
{ "vfpv3-fp16", ARM::FK_VFPV3_FP16, ARM::FV_VFPV3_FP16, ARM::NS_None, ARM::FR_None},
{ "vfpv3-d16", ARM::FK_VFPV3_D16, ARM::FV_VFPV3, ARM::NS_None, ARM::FR_D16},
{ "vfpv3-d16-fp16", ARM::FK_VFPV3_D16_FP16, ARM::FV_VFPV3_FP16, ARM::NS_None, ARM::FR_D16},
{ "vfpv3xd", ARM::FK_VFPV3XD, ARM::FV_VFPV3, ARM::NS_None, ARM::FR_SP_D16},
{ "vfpv3xd-fp16", ARM::FK_VFPV3XD_FP16, ARM::FV_VFPV3_FP16, ARM::NS_None, ARM::FR_SP_D16},
{ "vfpv4", ARM::FK_VFPV4, ARM::FV_VFPV4, ARM::NS_None, ARM::FR_None},
{ "vfpv4-d16", ARM::FK_VFPV4_D16, ARM::FV_VFPV4, ARM::NS_None, ARM::FR_D16},
{ "fpv4-sp-d16", ARM::FK_FPV4_SP_D16, ARM::FV_VFPV4, ARM::NS_None, ARM::FR_SP_D16},
{ "fpv5-d16", ARM::FK_FPV5_D16, ARM::FV_VFPV5, ARM::NS_None, ARM::FR_D16},
{ "fpv5-sp-d16", ARM::FK_FPV5_SP_D16, ARM::FV_VFPV5, ARM::NS_None, ARM::FR_SP_D16},
{ "fp-armv8", ARM::FK_FP_ARMV8, ARM::FV_VFPV5, ARM::NS_None, ARM::FR_None},
{ "neon", ARM::FK_NEON, ARM::FV_VFPV3, ARM::NS_Neon, ARM::FR_None},
{ "neon-fp16", ARM::FK_NEON_FP16, ARM::FV_VFPV3_FP16, ARM::NS_Neon, ARM::FR_None},
{ "neon-vfpv4", ARM::FK_NEON_VFPV4, ARM::FV_VFPV4, ARM::NS_Neon, ARM::FR_None},
{ "neon-fp-armv8", ARM::FK_NEON_FP_ARMV8, ARM::FV_VFPV5, ARM::NS_Neon, ARM::FR_None},
{ "crypto-neon-fp-armv8",
ARM::FK_CRYPTO_NEON_FP_ARMV8, ARM::FV_VFPV5, ARM::NS_Crypto, ARM::FR_None},
{ "softvfp", ARM::FK_SOFTVFP, ARM::FV_NONE, ARM::NS_None, ARM::FR_None},
};
// List of canonical arch names (use getArchSynonym).
// This table also provides the build attribute fields for CPU arch
// and Arch ID, according to the Addenda to the ARM ABI, chapters
// 2.4 and 2.3.5.2 respectively.
// FIXME: SubArch values were simplified to fit into the expectations
// of the triples and are not conforming with their official names.
// Check to see if the expectation should be changed.
// FIXME: TableGen this.
struct {
const char *Name;
ARM::ArchKind ID;
const char *CPUAttr; // CPU class in build attributes.
const char *SubArch; // Sub-Arch name.
ARMBuildAttrs::CPUArch ArchAttr; // Arch ID in build attributes.
} ARCHNames[] = {
{ "invalid", ARM::AK_INVALID, nullptr, nullptr, ARMBuildAttrs::CPUArch::Pre_v4 },
{ "armv2", ARM::AK_ARMV2, "2", "v2", ARMBuildAttrs::CPUArch::Pre_v4 },
{ "armv2a", ARM::AK_ARMV2A, "2A", "v2a", ARMBuildAttrs::CPUArch::Pre_v4 },
{ "armv3", ARM::AK_ARMV3, "3", "v3", ARMBuildAttrs::CPUArch::Pre_v4 },
{ "armv3m", ARM::AK_ARMV3M, "3M", "v3m", ARMBuildAttrs::CPUArch::Pre_v4 },
{ "armv4", ARM::AK_ARMV4, "4", "v4", ARMBuildAttrs::CPUArch::v4 },
{ "armv4t", ARM::AK_ARMV4T, "4T", "v4t", ARMBuildAttrs::CPUArch::v4T },
{ "armv5t", ARM::AK_ARMV5T, "5T", "v5", ARMBuildAttrs::CPUArch::v5T },
{ "armv5te", ARM::AK_ARMV5TE, "5TE", "v5e", ARMBuildAttrs::CPUArch::v5TE },
{ "armv5tej", ARM::AK_ARMV5TEJ, "5TEJ", "v5e", ARMBuildAttrs::CPUArch::v5TEJ },
{ "armv6", ARM::AK_ARMV6, "6", "v6", ARMBuildAttrs::CPUArch::v6 },
{ "armv6k", ARM::AK_ARMV6K, "6K", "v6k", ARMBuildAttrs::CPUArch::v6K },
{ "armv6t2", ARM::AK_ARMV6T2, "6T2", "v6t2", ARMBuildAttrs::CPUArch::v6T2 },
{ "armv6z", ARM::AK_ARMV6Z, "6Z", "v6z", ARMBuildAttrs::CPUArch::v6KZ },
{ "armv6zk", ARM::AK_ARMV6ZK, "6ZK", "v6zk", ARMBuildAttrs::CPUArch::v6KZ },
{ "armv6-m", ARM::AK_ARMV6M, "6-M", "v6m", ARMBuildAttrs::CPUArch::v6_M },
{ "armv6s-m", ARM::AK_ARMV6SM, "6S-M", "v6sm", ARMBuildAttrs::CPUArch::v6S_M },
{ "armv7-a", ARM::AK_ARMV7A, "7-A", "v7", ARMBuildAttrs::CPUArch::v7 },
{ "armv7-r", ARM::AK_ARMV7R, "7-R", "v7r", ARMBuildAttrs::CPUArch::v7 },
{ "armv7-m", ARM::AK_ARMV7M, "7-M", "v7m", ARMBuildAttrs::CPUArch::v7 },
{ "armv7e-m", ARM::AK_ARMV7EM, "7E-M", "v7em", ARMBuildAttrs::CPUArch::v7E_M },
{ "armv8-a", ARM::AK_ARMV8A, "8-A", "v8", ARMBuildAttrs::CPUArch::v8 },
{ "armv8.1-a", ARM::AK_ARMV8_1A, "8.1-A", "v8.1a", ARMBuildAttrs::CPUArch::v8 },
// Non-standard Arch names.
{ "iwmmxt", ARM::AK_IWMMXT, "iwmmxt", "", ARMBuildAttrs::CPUArch::v5TE },
{ "iwmmxt2", ARM::AK_IWMMXT2, "iwmmxt2", "", ARMBuildAttrs::CPUArch::v5TE },
{ "xscale", ARM::AK_XSCALE, "xscale", "", ARMBuildAttrs::CPUArch::v5TE },
{ "armv5", ARM::AK_ARMV5, "5T", "v5", ARMBuildAttrs::CPUArch::v5T },
{ "armv5e", ARM::AK_ARMV5E, "5TE", "v5e", ARMBuildAttrs::CPUArch::v5TE },
{ "armv6j", ARM::AK_ARMV6J, "6J", "v6", ARMBuildAttrs::CPUArch::v6 },
{ "armv6hl", ARM::AK_ARMV6HL, "6-M", "v6hl", ARMBuildAttrs::CPUArch::v6_M },
{ "armv7", ARM::AK_ARMV7, "7", "v7", ARMBuildAttrs::CPUArch::v7 },
{ "armv7l", ARM::AK_ARMV7L, "7-L", "v7l", ARMBuildAttrs::CPUArch::v7 },
{ "armv7hl", ARM::AK_ARMV7HL, "7-L", "v7hl", ARMBuildAttrs::CPUArch::v7 },
{ "armv7s", ARM::AK_ARMV7S, "7-S", "v7s", ARMBuildAttrs::CPUArch::v7 }
};
// List of Arch Extension names.
// FIXME: TableGen this.
struct {
const char *Name;
unsigned ID;
} ARCHExtNames[] = {
{ "invalid", ARM::AEK_INVALID },
{ "none", ARM::AEK_NONE },
{ "crc", ARM::AEK_CRC },
{ "crypto", ARM::AEK_CRYPTO },
{ "fp", ARM::AEK_FP },
{ "idiv", (ARM::AEK_HWDIVARM | ARM::AEK_HWDIV) },
{ "mp", ARM::AEK_MP },
{ "simd", ARM::AEK_SIMD },
{ "sec", ARM::AEK_SEC },
{ "virt", ARM::AEK_VIRT },
{ "os", ARM::AEK_OS },
{ "iwmmxt", ARM::AEK_IWMMXT },
{ "iwmmxt2", ARM::AEK_IWMMXT2 },
{ "maverick", ARM::AEK_MAVERICK },
{ "xscale", ARM::AEK_XSCALE }
};
// List of HWDiv names (use getHWDivSynonym) and which architectural
// features they correspond to (use getHWDivFeatures).
// FIXME: TableGen this.
struct {
const char *Name;
unsigned ID;
} HWDivNames[] = {
{ "invalid", ARM::AEK_INVALID },
{ "none", ARM::AEK_NONE },
{ "thumb", ARM::AEK_HWDIV },
{ "arm", ARM::AEK_HWDIVARM },
{ "arm,thumb", (ARM::AEK_HWDIVARM | ARM::AEK_HWDIV) }
};
// List of CPU names and their arches.
// The same CPU can have multiple arches and can be default on multiple arches.
// When finding the Arch for a CPU, first-found prevails. Sort them accordingly.
// When this becomes table-generated, we'd probably need two tables.
// FIXME: TableGen this.
struct {
const char *Name;
ARM::ArchKind ArchID;
ARM::FPUKind DefaultFPU;
bool Default; // is $Name the default CPU for $ArchID ?
} CPUNames[] = {
{ "arm2", ARM::AK_ARMV2, ARM::FK_NONE, true },
{ "arm3", ARM::AK_ARMV2A, ARM::FK_NONE, true },
{ "arm6", ARM::AK_ARMV3, ARM::FK_NONE, true },
{ "arm7m", ARM::AK_ARMV3M, ARM::FK_NONE, true },
{ "arm8", ARM::AK_ARMV4, ARM::FK_NONE, false },
{ "arm810", ARM::AK_ARMV4, ARM::FK_NONE, false },
{ "strongarm", ARM::AK_ARMV4, ARM::FK_NONE, true },
{ "strongarm110", ARM::AK_ARMV4, ARM::FK_NONE, false },
{ "strongarm1100", ARM::AK_ARMV4, ARM::FK_NONE, false },
{ "strongarm1110", ARM::AK_ARMV4, ARM::FK_NONE, false },
{ "arm7tdmi", ARM::AK_ARMV4T, ARM::FK_NONE, true },
{ "arm7tdmi-s", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm710t", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm720t", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm9", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm9tdmi", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm920", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm920t", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm922t", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm9312", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm940t", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "ep9312", ARM::AK_ARMV4T, ARM::FK_NONE, false },
{ "arm10tdmi", ARM::AK_ARMV5T, ARM::FK_NONE, true },
{ "arm1020t", ARM::AK_ARMV5T, ARM::FK_NONE, false },
{ "arm9e", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "arm946e-s", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "arm966e-s", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "arm968e-s", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "arm10e", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "arm1020e", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "arm1022e", ARM::AK_ARMV5TE, ARM::FK_NONE, true },
{ "iwmmxt", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "xscale", ARM::AK_ARMV5TE, ARM::FK_NONE, false },
{ "arm926ej-s", ARM::AK_ARMV5TEJ, ARM::FK_NONE, true },
{ "arm1136jf-s", ARM::AK_ARMV6, ARM::FK_VFPV2, true },
{ "arm1176j-s", ARM::AK_ARMV6K, ARM::FK_NONE, false },
{ "arm1176jz-s", ARM::AK_ARMV6K, ARM::FK_NONE, false },
{ "mpcore", ARM::AK_ARMV6K, ARM::FK_VFPV2, false },
{ "mpcorenovfp", ARM::AK_ARMV6K, ARM::FK_NONE, false },
{ "arm1176jzf-s", ARM::AK_ARMV6K, ARM::FK_VFPV2, true },
{ "arm1176jzf-s", ARM::AK_ARMV6Z, ARM::FK_VFPV2, true },
{ "arm1176jzf-s", ARM::AK_ARMV6ZK, ARM::FK_VFPV2, true },
{ "arm1156t2-s", ARM::AK_ARMV6T2, ARM::FK_NONE, true },
{ "arm1156t2f-s", ARM::AK_ARMV6T2, ARM::FK_VFPV2, false },
{ "cortex-m0", ARM::AK_ARMV6M, ARM::FK_NONE, true },
{ "cortex-m0plus", ARM::AK_ARMV6M, ARM::FK_NONE, false },
{ "cortex-m1", ARM::AK_ARMV6M, ARM::FK_NONE, false },
{ "sc000", ARM::AK_ARMV6M, ARM::FK_NONE, false },
{ "cortex-a5", ARM::AK_ARMV7A, ARM::FK_NEON_VFPV4, false },
{ "cortex-a7", ARM::AK_ARMV7A, ARM::FK_NEON_VFPV4, false },
{ "cortex-a8", ARM::AK_ARMV7A, ARM::FK_NEON, true },
{ "cortex-a9", ARM::AK_ARMV7A, ARM::FK_NEON_FP16, false },
{ "cortex-a12", ARM::AK_ARMV7A, ARM::FK_NEON_VFPV4, false },
{ "cortex-a15", ARM::AK_ARMV7A, ARM::FK_NEON_VFPV4, false },
{ "cortex-a17", ARM::AK_ARMV7A, ARM::FK_NEON_VFPV4, false },
{ "krait", ARM::AK_ARMV7A, ARM::FK_NEON_VFPV4, false },
{ "cortex-r4", ARM::AK_ARMV7R, ARM::FK_NONE, true },
{ "cortex-r4f", ARM::AK_ARMV7R, ARM::FK_VFPV3_D16, false },
{ "cortex-r5", ARM::AK_ARMV7R, ARM::FK_VFPV3_D16, false },
{ "cortex-r7", ARM::AK_ARMV7R, ARM::FK_VFPV3_D16_FP16, false },
{ "sc300", ARM::AK_ARMV7M, ARM::FK_NONE, false },
{ "cortex-m3", ARM::AK_ARMV7M, ARM::FK_NONE, true },
{ "cortex-m4", ARM::AK_ARMV7EM, ARM::FK_FPV4_SP_D16, true },
{ "cortex-m7", ARM::AK_ARMV7EM, ARM::FK_FPV5_D16, false },
{ "cortex-a53", ARM::AK_ARMV8A, ARM::FK_CRYPTO_NEON_FP_ARMV8, true },
{ "cortex-a57", ARM::AK_ARMV8A, ARM::FK_CRYPTO_NEON_FP_ARMV8, false },
{ "cortex-a72", ARM::AK_ARMV8A, ARM::FK_CRYPTO_NEON_FP_ARMV8, false },
{ "cyclone", ARM::AK_ARMV8A, ARM::FK_CRYPTO_NEON_FP_ARMV8, false },
{ "generic", ARM::AK_ARMV8_1A, ARM::FK_NEON_FP_ARMV8, true },
// Non-standard Arch names.
{ "iwmmxt", ARM::AK_IWMMXT, ARM::FK_NONE, true },
{ "xscale", ARM::AK_XSCALE, ARM::FK_NONE, true },
{ "arm10tdmi", ARM::AK_ARMV5, ARM::FK_NONE, true },
{ "arm1022e", ARM::AK_ARMV5E, ARM::FK_NONE, true },
{ "arm1136j-s", ARM::AK_ARMV6J, ARM::FK_NONE, true },
{ "arm1136jz-s", ARM::AK_ARMV6J, ARM::FK_NONE, false },
{ "cortex-m0", ARM::AK_ARMV6SM, ARM::FK_NONE, true },
{ "arm1176jzf-s", ARM::AK_ARMV6HL, ARM::FK_VFPV2, true },
{ "cortex-a8", ARM::AK_ARMV7, ARM::FK_NEON, true },
{ "cortex-a8", ARM::AK_ARMV7L, ARM::FK_NEON, true },
{ "cortex-a8", ARM::AK_ARMV7HL, ARM::FK_NEON, true },
{ "cortex-m4", ARM::AK_ARMV7EM, ARM::FK_NONE, true },
{ "swift", ARM::AK_ARMV7S, ARM::FK_NEON_VFPV4, true },
// Invalid CPU
{ "invalid", ARM::AK_INVALID, ARM::FK_INVALID, true }
};
} // namespace
// ======================================================= //
// Information by ID
// ======================================================= //
const char *ARMTargetParser::getFPUName(unsigned FPUKind) {
if (FPUKind >= ARM::FK_LAST)
return nullptr;
return FPUNames[FPUKind].Name;
}
unsigned ARMTargetParser::getFPUVersion(unsigned FPUKind) {
if (FPUKind >= ARM::FK_LAST)
return 0;
return FPUNames[FPUKind].FPUVersion;
}
unsigned ARMTargetParser::getFPUNeonSupportLevel(unsigned FPUKind) {
if (FPUKind >= ARM::FK_LAST)
return 0;
return FPUNames[FPUKind].NeonSupport;
}
unsigned ARMTargetParser::getFPURestriction(unsigned FPUKind) {
if (FPUKind >= ARM::FK_LAST)
return 0;
return FPUNames[FPUKind].Restriction;
}
unsigned ARMTargetParser::getDefaultFPU(StringRef CPU) {
for (const auto C : CPUNames) {
if (CPU == C.Name)
return C.DefaultFPU;
}
return ARM::FK_INVALID;
}
bool ARMTargetParser::getHWDivFeatures(unsigned HWDivKind,
std::vector<const char *> &Features) {
if (HWDivKind == ARM::AEK_INVALID)
return false;
if (HWDivKind & ARM::AEK_HWDIVARM)
Features.push_back("+hwdiv-arm");
else
Features.push_back("-hwdiv-arm");
if (HWDivKind & ARM::AEK_HWDIV)
Features.push_back("+hwdiv");
else
Features.push_back("-hwdiv");
return true;
}
bool ARMTargetParser::getFPUFeatures(unsigned FPUKind,
std::vector<const char *> &Features) {
if (FPUKind >= ARM::FK_LAST || FPUKind == ARM::FK_INVALID)
return false;
// fp-only-sp and d16 subtarget features are independent of each other, so we
// must enable/disable both.
switch (FPUNames[FPUKind].Restriction) {
case ARM::FR_SP_D16:
Features.push_back("+fp-only-sp");
Features.push_back("+d16");
break;
case ARM::FR_D16:
Features.push_back("-fp-only-sp");
Features.push_back("+d16");
break;
case ARM::FR_None:
Features.push_back("-fp-only-sp");
Features.push_back("-d16");
break;
}
// FPU version subtarget features are inclusive of lower-numbered ones, so
// enable the one corresponding to this version and disable all that are
// higher. We also have to make sure to disable fp16 when vfp4 is disabled,
// as +vfp4 implies +fp16 but -vfp4 does not imply -fp16.
switch (FPUNames[FPUKind].FPUVersion) {
case ARM::FV_VFPV5:
Features.push_back("+fp-armv8");
break;
case ARM::FV_VFPV4:
Features.push_back("+vfp4");
Features.push_back("-fp-armv8");
break;
case ARM::FV_VFPV3_FP16:
Features.push_back("+vfp3");
Features.push_back("+fp16");
Features.push_back("-vfp4");
Features.push_back("-fp-armv8");
break;
case ARM::FV_VFPV3:
Features.push_back("+vfp3");
Features.push_back("-fp16");
Features.push_back("-vfp4");
Features.push_back("-fp-armv8");
break;
case ARM::FV_VFPV2:
Features.push_back("+vfp2");
Features.push_back("-vfp3");
Features.push_back("-fp16");
Features.push_back("-vfp4");
Features.push_back("-fp-armv8");
break;
case ARM::FV_NONE:
Features.push_back("-vfp2");
Features.push_back("-vfp3");
Features.push_back("-fp16");
Features.push_back("-vfp4");
Features.push_back("-fp-armv8");
break;
}
// crypto includes neon, so we handle this similarly to FPU version.
switch (FPUNames[FPUKind].NeonSupport) {
case ARM::NS_Crypto:
Features.push_back("+crypto");
break;
case ARM::NS_Neon:
Features.push_back("+neon");
Features.push_back("-crypto");
break;
case ARM::NS_None:
Features.push_back("-neon");
Features.push_back("-crypto");
break;
}
return true;
}
const char *ARMTargetParser::getArchName(unsigned ArchKind) {
if (ArchKind >= ARM::AK_LAST)
return nullptr;
return ARCHNames[ArchKind].Name;
}
const char *ARMTargetParser::getCPUAttr(unsigned ArchKind) {
if (ArchKind >= ARM::AK_LAST)
return nullptr;
return ARCHNames[ArchKind].CPUAttr;
}
const char *ARMTargetParser::getSubArch(unsigned ArchKind) {
if (ArchKind >= ARM::AK_LAST)
return nullptr;
return ARCHNames[ArchKind].SubArch;
}
unsigned ARMTargetParser::getArchAttr(unsigned ArchKind) {
if (ArchKind >= ARM::AK_LAST)
return ARMBuildAttrs::CPUArch::Pre_v4;
return ARCHNames[ArchKind].ArchAttr;
}
const char *ARMTargetParser::getArchExtName(unsigned ArchExtKind) {
for (const auto AE : ARCHExtNames) {
if (ArchExtKind == AE.ID)
return AE.Name;
}
return nullptr;
}
const char *ARMTargetParser::getHWDivName(unsigned HWDivKind) {
for (const auto D : HWDivNames) {
if (HWDivKind == D.ID)
return D.Name;
}
return nullptr;
}
const char *ARMTargetParser::getDefaultCPU(StringRef Arch) {
unsigned AK = parseArch(Arch);
if (AK == ARM::AK_INVALID)
return nullptr;
// Look for multiple AKs to find the default for pair AK+Name.
for (const auto CPU : CPUNames) {
if (CPU.ArchID == AK && CPU.Default)
return CPU.Name;
}
return nullptr;
}
// ======================================================= //
// Parsers
// ======================================================= //
StringRef ARMTargetParser::getHWDivSynonym(StringRef HWDiv) {
return StringSwitch<StringRef>(HWDiv)
.Case("thumb,arm", "arm,thumb")
.Default(HWDiv);
}
StringRef ARMTargetParser::getFPUSynonym(StringRef FPU) {
return StringSwitch<StringRef>(FPU)
.Cases("fpa", "fpe2", "fpe3", "maverick", "invalid") // Unsupported
.Case("vfp2", "vfpv2")
.Case("vfp3", "vfpv3")
.Case("vfp4", "vfpv4")
.Case("vfp3-d16", "vfpv3-d16")
.Case("vfp4-d16", "vfpv4-d16")
.Cases("fp4-sp-d16", "vfpv4-sp-d16", "fpv4-sp-d16")
.Cases("fp4-dp-d16", "fpv4-dp-d16", "vfpv4-d16")
.Case("fp5-sp-d16", "fpv5-sp-d16")
.Cases("fp5-dp-d16", "fpv5-dp-d16", "fpv5-d16")
// FIXME: Clang uses it, but it's bogus, since neon defaults to vfpv3.
.Case("neon-vfpv3", "neon")
.Default(FPU);
}
StringRef ARMTargetParser::getArchSynonym(StringRef Arch) {
return StringSwitch<StringRef>(Arch)
.Case("v6sm", "v6s-m")
.Case("v6m", "v6-m")
.Case("v7a", "v7-a")
.Case("v7r", "v7-r")
.Case("v7m", "v7-m")
.Case("v7em", "v7e-m")
.Cases("v8", "v8a", "aarch64", "arm64", "v8-a")
.Case("v8.1a", "v8.1-a")
.Default(Arch);
}
// MArch is expected to be of the form (arm|thumb)?(eb)?(v.+)?(eb)?, but
// (iwmmxt|xscale)(eb)? is also permitted. If the former, return
// "v.+", if the latter, return unmodified string, minus 'eb'.
// If invalid, return empty string.
StringRef ARMTargetParser::getCanonicalArchName(StringRef Arch) {
size_t offset = StringRef::npos;
StringRef A = Arch;
StringRef Error = "";
// Begins with "arm" / "thumb", move past it.
if (A.startswith("arm64"))
offset = 5;
else if (A.startswith("arm"))
offset = 3;
else if (A.startswith("thumb"))
offset = 5;
else if (A.startswith("aarch64")) {
offset = 7;
// AArch64 uses "_be", not "eb" suffix.
if (A.find("eb") != StringRef::npos)
return Error;
if (A.substr(offset,3) == "_be")
offset += 3;
}
// Ex. "armebv7", move past the "eb".
if (offset != StringRef::npos && A.substr(offset, 2) == "eb")
offset += 2;
// Or, if it ends with eb ("armv7eb"), chop it off.
else if (A.endswith("eb"))
A = A.substr(0, A.size() - 2);
// Trim the head
if (offset != StringRef::npos)
A = A.substr(offset);
// Empty string means offset reached the end, which means it's valid.
if (A.empty())
return Arch;
// Only match non-marketing names
if (offset != StringRef::npos) {
// Must start with 'vN'.
if (A[0] != 'v' || !std::isdigit(A[1]))
return Error;
// Can't have an extra 'eb'.
if (A.find("eb") != StringRef::npos)
return Error;
}
// Arch will either be a 'v' name (v7a) or a marketing name (xscale).
return A;
}
unsigned ARMTargetParser::parseHWDiv(StringRef HWDiv) {
StringRef Syn = getHWDivSynonym(HWDiv);
for (const auto D : HWDivNames) {
if (Syn == D.Name)
return D.ID;
}
return ARM::AEK_INVALID;
}
unsigned ARMTargetParser::parseFPU(StringRef FPU) {
StringRef Syn = getFPUSynonym(FPU);
for (const auto F : FPUNames) {
if (Syn == F.Name)
return F.ID;
}
return ARM::FK_INVALID;
}
// Allows partial match, ex. "v7a" matches "armv7a".
unsigned ARMTargetParser::parseArch(StringRef Arch) {
Arch = getCanonicalArchName(Arch);
StringRef Syn = getArchSynonym(Arch);
for (const auto A : ARCHNames) {
if (StringRef(A.Name).endswith(Syn))
return A.ID;
}
return ARM::AK_INVALID;
}
unsigned ARMTargetParser::parseArchExt(StringRef ArchExt) {
for (const auto A : ARCHExtNames) {
if (ArchExt == A.Name)
return A.ID;
}
return ARM::AEK_INVALID;
}
unsigned ARMTargetParser::parseCPUArch(StringRef CPU) {
for (const auto C : CPUNames) {
if (CPU == C.Name)
return C.ArchID;
}
return ARM::AK_INVALID;
}
// ARM, Thumb, AArch64
unsigned ARMTargetParser::parseArchISA(StringRef Arch) {
return StringSwitch<unsigned>(Arch)
.StartsWith("aarch64", ARM::IK_AARCH64)
.StartsWith("arm64", ARM::IK_AARCH64)
.StartsWith("thumb", ARM::IK_THUMB)
.StartsWith("arm", ARM::IK_ARM)
.Default(ARM::EK_INVALID);
}
// Little/Big endian
unsigned ARMTargetParser::parseArchEndian(StringRef Arch) {
if (Arch.startswith("armeb") ||
Arch.startswith("thumbeb") ||
Arch.startswith("aarch64_be"))
return ARM::EK_BIG;
if (Arch.startswith("arm") || Arch.startswith("thumb")) {
if (Arch.endswith("eb"))
return ARM::EK_BIG;
else
return ARM::EK_LITTLE;
}
if (Arch.startswith("aarch64"))
return ARM::EK_LITTLE;
return ARM::EK_INVALID;
}
// Profile A/R/M
unsigned ARMTargetParser::parseArchProfile(StringRef Arch) {
Arch = getCanonicalArchName(Arch);
switch(parseArch(Arch)) {
case ARM::AK_ARMV6M:
case ARM::AK_ARMV7M:
case ARM::AK_ARMV6SM:
case ARM::AK_ARMV7EM:
return ARM::PK_M;
case ARM::AK_ARMV7R:
return ARM::PK_R;
case ARM::AK_ARMV7:
case ARM::AK_ARMV7A:
case ARM::AK_ARMV7L:
case ARM::AK_ARMV8A:
case ARM::AK_ARMV8_1A:
return ARM::PK_A;
}
return ARM::PK_INVALID;
}
// Version number (ex. v7 = 7).
unsigned ARMTargetParser::parseArchVersion(StringRef Arch) {
Arch = getCanonicalArchName(Arch);
switch(parseArch(Arch)) {
case ARM::AK_ARMV2:
case ARM::AK_ARMV2A:
return 2;
case ARM::AK_ARMV3:
case ARM::AK_ARMV3M:
return 3;
case ARM::AK_ARMV4:
case ARM::AK_ARMV4T:
return 4;
case ARM::AK_ARMV5:
case ARM::AK_ARMV5T:
case ARM::AK_ARMV5TE:
case ARM::AK_IWMMXT:
case ARM::AK_IWMMXT2:
case ARM::AK_XSCALE:
case ARM::AK_ARMV5E:
case ARM::AK_ARMV5TEJ:
return 5;
case ARM::AK_ARMV6:
case ARM::AK_ARMV6J:
case ARM::AK_ARMV6K:
case ARM::AK_ARMV6T2:
case ARM::AK_ARMV6Z:
case ARM::AK_ARMV6ZK:
case ARM::AK_ARMV6M:
case ARM::AK_ARMV6SM:
case ARM::AK_ARMV6HL:
return 6;
case ARM::AK_ARMV7:
case ARM::AK_ARMV7A:
case ARM::AK_ARMV7R:
case ARM::AK_ARMV7M:
case ARM::AK_ARMV7L:
case ARM::AK_ARMV7HL:
case ARM::AK_ARMV7S:
case ARM::AK_ARMV7EM:
return 7;
case ARM::AK_ARMV8A:
case ARM::AK_ARMV8_1A:
return 8;
}
return 0;
}
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