[PATCH] D142950: [LoongArch] Support getHostCPUName and getHostCPUFeatures
wanglei via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Jan 30 19:19:32 PST 2023
wangleiat created this revision.
wangleiat added reviewers: SixWeining, xen0n, xry111, MaskRay, gonglingqin.
Herald added subscribers: hiraditya, krytarowski.
Herald added a project: All.
wangleiat requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D142950
Files:
llvm/lib/TargetParser/Host.cpp
Index: llvm/lib/TargetParser/Host.cpp
===================================================================
--- llvm/lib/TargetParser/Host.cpp
+++ llvm/lib/TargetParser/Host.cpp
@@ -1448,6 +1448,20 @@
return "generic";
}
}
+#elif defined(__loongarch__)
+StringRef sys::getHostCPUName() {
+ // Use processor id to detect cpu name.
+ uint32_t processor_id;
+ __asm__("cpucfg %[prid], $zero\n\t" : [prid] "=r"(processor_id));
+ switch (processor_id & 0xff00) {
+ case 0xc000: // Loongson 64bit, 4-issue
+ return "la464";
+ // TODO: Others.
+ default:
+ break;
+ }
+ return "generic";
+}
#elif defined(__riscv)
StringRef sys::getHostCPUName() {
#if defined(__linux__)
@@ -1842,6 +1856,23 @@
return true;
}
+#elif defined(__linux__) && defined(__loongarch__)
+#include <sys/auxv.h>
+bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
+ unsigned long hwcap = getauxval(AT_HWCAP);
+ bool HasFPU = hwcap & (1UL << 3); // HWCAP_LOONGARCH_FPU
+ uint32_t cpucfg2 = 0x2;
+ __asm__("cpucfg %[cpucfg2], %[cpucfg2]\n\t" : [cpucfg2] "+r"(cpucfg2));
+
+ Features["f"] = HasFPU && (cpucfg2 & (1U << 1)); // CPUCFG.2.FP_SP
+ Features["d"] = HasFPU && (cpucfg2 & (1U << 2)); // CPUCFG.2.FP_DP
+
+ Features["lsx"] = hwcap & (1UL << 4); // HWCAP_LOONGARCH_LSX
+ Features["lasx"] = hwcap & (1UL << 5); // HWCAP_LOONGARCH_LASX
+ Features["lvz"] = hwcap & (1UL << 9); // HWCAP_LOONGARCH_LVZ
+
+ return true;
+}
#else
bool sys::getHostCPUFeatures(StringMap<bool> &Features) { return false; }
#endif
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