[PATCH] D123978: [RISCV] Support getHostCpuName for sifive-u74
luxufan via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Apr 18 20:46:49 PDT 2022
StephenFan created this revision.
StephenFan added reviewers: MaskRay, luismarques, craig.topper.
Herald added subscribers: sunshaoce, VincentWu, luke957, vkmr, dexonsmith, evandro, sameer.abuasal, s.egerton, Jim, benna, psnobl, rogfer01, kito-cheng, simoncook, hiraditya, krytarowski, arichardson.
Herald added a project: All.
StephenFan requested review of this revision.
Herald added subscribers: llvm-commits, pcwang-thead, eopXD.
Herald added a project: LLVM.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D123978
Files:
llvm/include/llvm/Support/Host.h
llvm/lib/Support/Host.cpp
llvm/unittests/Support/Host.cpp
Index: llvm/unittests/Support/Host.cpp
===================================================================
--- llvm/unittests/Support/Host.cpp
+++ llvm/unittests/Support/Host.cpp
@@ -374,6 +374,18 @@
}
}
+TEST(getLinuxHostCPUName, RISCV) {
+ const std::string SifiveU74MCProcCPUInfo = R"(
+processor : 0
+hart : 2
+isa : rv64imafdc
+mmu : sv39
+uarch : sifive,u74-mc
+)";
+ EXPECT_EQ(sys::detail::getHostCPUNameForRISCV(SifiveU74MCProcCPUInfo),
+ "sifive-u74");
+}
+
static bool runAndGetCommandOutput(
const char *ExePath, ArrayRef<llvm::StringRef> argv,
std::unique_ptr<char[]> &Buffer, off_t &Size) {
Index: llvm/lib/Support/Host.cpp
===================================================================
--- llvm/lib/Support/Host.cpp
+++ llvm/lib/Support/Host.cpp
@@ -380,6 +380,25 @@
return "generic";
}
+StringRef sys::detail::getHostCPUNameForRISCV(StringRef ProcCpuinfoContent) {
+ // There are 24 lines in /proc/cpuinfo
+ SmallVector<StringRef, 24> Lines;
+ ProcCpuinfoContent.split(Lines, "\n");
+
+ // Look for uarch line to determine cpu name
+ StringRef UArch;
+ for (unsigned I = 0, E = Lines.size(); I != E; ++I) {
+ if (Lines[I].startswith("uarch")) {
+ UArch = Lines[I].substr(5).ltrim("\t :");
+ break;
+ }
+ }
+
+ return StringSwitch<const char *>(UArch)
+ .Case("sifive,u74-mc", "sifive-u74")
+ .Default("generic");
+}
+
StringRef sys::detail::getHostCPUNameForBPF() {
#if !defined(__linux__) || !defined(__x86_64__)
return "generic";
@@ -1373,6 +1392,11 @@
}
#elif defined(__riscv)
StringRef sys::getHostCPUName() {
+#if defined(__linux__)
+ std::unique_ptr<llvm::MemoryBuffer> P = getProcCpuinfoContent();
+ StringRef Content = P ? P->getBuffer() : "";
+ return detail::getHostCPUNameForRISCV(Content);
+#else
#if __riscv_xlen == 64
return "generic-rv64";
#elif __riscv_xlen == 32
@@ -1380,6 +1404,7 @@
#else
#error "Unhandled value of __riscv_xlen"
#endif
+#endif
}
#else
StringRef sys::getHostCPUName() { return "generic"; }
Index: llvm/include/llvm/Support/Host.h
===================================================================
--- llvm/include/llvm/Support/Host.h
+++ llvm/include/llvm/Support/Host.h
@@ -64,6 +64,7 @@
StringRef getHostCPUNameForPowerPC(StringRef ProcCpuinfoContent);
StringRef getHostCPUNameForARM(StringRef ProcCpuinfoContent);
StringRef getHostCPUNameForS390x(StringRef ProcCpuinfoContent);
+ StringRef getHostCPUNameForRISCV(StringRef ProcCpuinfoContent);
StringRef getHostCPUNameForBPF();
/// Helper functions to extract CPU details from CPUID on x86.
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