[llvm] [RISCV] Add support for getHostCPUFeatures using hwprobe (PR #94352)
Yingwei Zheng via llvm-commits
llvm-commits at lists.llvm.org
Tue Jun 4 07:11:46 PDT 2024
https://github.com/dtcxzyw updated https://github.com/llvm/llvm-project/pull/94352
>From ff839bef048a65760f4cd0e9abafe11cfebd9362 Mon Sep 17 00:00:00 2001
From: Yingwei Zheng <dtcxzyw2333 at gmail.com>
Date: Tue, 4 Jun 2024 21:08:27 +0800
Subject: [PATCH 1/2] [RISCV] Add support for getHostCPUFeatures using hwprobe
Co-authored-by: Yangyu Chen <cyy at cyyself.name>
---
llvm/lib/TargetParser/Host.cpp | 68 ++++++++++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
diff --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index 68155acd9e5bc..b4a13b38eb380 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -1998,6 +1998,74 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
return true;
}
+#elif defined(__linux__) && defined(__riscv)
+#ifdef __has_include
+#if __has_include(<asm/hwprobe.h>)
+#include <asm/hwprobe.h>
+#endif
+#endif
+bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
+#ifdef RISCV_HWPROBE_KEY_MVENDORID
+ riscv_hwprobe Query[2]{
+ {RISCV_HWPROBE_KEY_IMA_EXT_0, 0},
+ {RISCV_HWPROBE_KEY_CPUPERF_0, 0},
+ };
+ int Ret = syscall(/*__NR_riscv_hwprobe=*/258, /*pairs=*/&Query,
+ /*pair_count=*/1, /*cpu_count=*/0, /*cpus=*/0, /*flags=*/0);
+ if (Ret != 0)
+ return false;
+
+ uint64_t ExtMask = Query[0].value;
+ Features["f"] = ExtMask & RISCV_HWPROBE_IMA_FD;
+ Features["d"] = ExtMask & RISCV_HWPROBE_IMA_FD;
+ Features["c"] = ExtMask & RISCV_HWPROBE_IMA_C;
+ Features["v"] = ExtMask & RISCV_HWPROBE_IMA_V;
+ Features["zba"] = ExtMask & RISCV_HWPROBE_IMA_ZBA;
+ Features["zbb"] = ExtMask & RISCV_HWPROBE_IMA_ZBB;
+ Features["zbs"] = ExtMask & RISCV_HWPROBE_IMA_ZBS;
+ Features["zicboz"] = ExtMask & RISCV_HWPROBE_IMA_ZICBOZ;
+ Features["zbc"] = ExtMask & RISCV_HWPROBE_IMA_ZBC;
+ Features["zbkb"] = ExtMask & RISCV_HWPROBE_IMA_ZBKB;
+ Features["zbkc"] = ExtMask & RISCV_HWPROBE_IMA_ZBKC;
+ Features["zbkx"] = ExtMask & RISCV_HWPROBE_IMA_ZBKX;
+ Features["zknd"] = ExtMask & RISCV_HWPROBE_IMA_ZKND;
+ Features["zkne"] = ExtMask & RISCV_HWPROBE_IMA_ZKNE;
+ Features["zknh"] = ExtMask & RISCV_HWPROBE_IMA_ZKNH;
+ Features["zksed"] = ExtMask & RISCV_HWPROBE_IMA_ZKSED;
+ Features["zksh"] = ExtMask & RISCV_HWPROBE_IMA_ZKSH;
+ Features["zkt"] = ExtMask & RISCV_HWPROBE_IMA_ZKT;
+ Features["zvbb"] = ExtMask & RISCV_HWPROBE_IMA_ZVBB;
+ Features["zvbc"] = ExtMask & RISCV_HWPROBE_IMA_ZVBC;
+ Features["zvkb"] = ExtMask & RISCV_HWPROBE_IMA_ZVKB;
+ Features["zvkg"] = ExtMask & RISCV_HWPROBE_IMA_ZVKG;
+ Features["zvkned"] = ExtMask & RISCV_HWPROBE_IMA_ZVKNED;
+ Features["zvknha"] = ExtMask & RISCV_HWPROBE_IMA_ZVKNHA;
+ Features["zvknhb"] = ExtMask & RISCV_HWPROBE_IMA_ZVKNHB;
+ Features["zvksed"] = ExtMask & RISCV_HWPROBE_IMA_ZVKSED;
+ Features["zvksh"] = ExtMask & RISCV_HWPROBE_IMA_ZVKSH;
+ Features["zvkt"] = ExtMask & RISCV_HWPROBE_IMA_ZVKT;
+ Features["zfh"] = ExtMask & RISCV_HWPROBE_IMA_ZFH;
+ Features["zfhmin"] = ExtMask & RISCV_HWPROBE_IMA_ZFHMIN;
+ Features["zihintntl"] = ExtMask & RISCV_HWPROBE_IMA_ZIHINTNTL;
+ Features["zvfh"] = ExtMask & RISCV_HWPROBE_IMA_ZVFH;
+ Features["zvfhmin"] = ExtMask & RISCV_HWPROBE_IMA_ZVFHMIN;
+ Features["zfa"] = ExtMask & RISCV_HWPROBE_IMA_ZFA;
+ Features["ztso"] = ExtMask & RISCV_HWPROBE_IMA_ZTSO;
+ Features["zacas"] = ExtMask & RISCV_HWPROBE_IMA_ZACAS;
+ Features["zicond"] = ExtMask & RISCV_HWPROBE_IMA_ZICOND;
+ Features["zihintpause"] = ExtMask & RISCV_HWPROBE_IMA_ZIHINTPAUSE;
+
+ uint64_t MisalignedMask = Query[1].value;
+ if (MisalignedMask == RISCV_HWPROBE_MISALIGNED_FAST) {
+ Features["unaligned-scalar-mem"] = true;
+ Features["unaligned-vector-mem"] = true;
+ }
+
+ return true;
+#else
+ return false;
+#endif
+}
#else
bool sys::getHostCPUFeatures(StringMap<bool> &Features) { return false; }
#endif
>From a2fa6e3d64d3a1e2a8e3a7af91068bdb1fda28b1 Mon Sep 17 00:00:00 2001
From: Yingwei Zheng <dtcxzyw2333 at gmail.com>
Date: Tue, 4 Jun 2024 22:10:55 +0800
Subject: [PATCH 2/2] [RISCV] Address review comments.
---
llvm/lib/TargetParser/Host.cpp | 112 +++++++++++++++------------------
1 file changed, 52 insertions(+), 60 deletions(-)
diff --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index b4a13b38eb380..ec275c0a7fded 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -1999,72 +1999,64 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
return true;
}
#elif defined(__linux__) && defined(__riscv)
-#ifdef __has_include
-#if __has_include(<asm/hwprobe.h>)
-#include <asm/hwprobe.h>
-#endif
-#endif
+// struct riscv_hwprobe
+struct RISCVHwProbe {
+ int64_t Key;
+ uint64_t Value;
+};
bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
-#ifdef RISCV_HWPROBE_KEY_MVENDORID
- riscv_hwprobe Query[2]{
- {RISCV_HWPROBE_KEY_IMA_EXT_0, 0},
- {RISCV_HWPROBE_KEY_CPUPERF_0, 0},
- };
- int Ret = syscall(/*__NR_riscv_hwprobe=*/258, /*pairs=*/&Query,
- /*pair_count=*/1, /*cpu_count=*/0, /*cpus=*/0, /*flags=*/0);
+ RISCVHwProbe Query[]{{/*RISCV_HWPROBE_KEY_IMA_EXT_0=*/4, 0}};
+ int Ret = syscall(/*__NR_riscv_hwprobe=*/258, /*pairs=*/Query,
+ /*pair_count=*/std::size(Query), /*cpu_count=*/0,
+ /*cpus=*/0, /*flags=*/0);
if (Ret != 0)
return false;
- uint64_t ExtMask = Query[0].value;
- Features["f"] = ExtMask & RISCV_HWPROBE_IMA_FD;
- Features["d"] = ExtMask & RISCV_HWPROBE_IMA_FD;
- Features["c"] = ExtMask & RISCV_HWPROBE_IMA_C;
- Features["v"] = ExtMask & RISCV_HWPROBE_IMA_V;
- Features["zba"] = ExtMask & RISCV_HWPROBE_IMA_ZBA;
- Features["zbb"] = ExtMask & RISCV_HWPROBE_IMA_ZBB;
- Features["zbs"] = ExtMask & RISCV_HWPROBE_IMA_ZBS;
- Features["zicboz"] = ExtMask & RISCV_HWPROBE_IMA_ZICBOZ;
- Features["zbc"] = ExtMask & RISCV_HWPROBE_IMA_ZBC;
- Features["zbkb"] = ExtMask & RISCV_HWPROBE_IMA_ZBKB;
- Features["zbkc"] = ExtMask & RISCV_HWPROBE_IMA_ZBKC;
- Features["zbkx"] = ExtMask & RISCV_HWPROBE_IMA_ZBKX;
- Features["zknd"] = ExtMask & RISCV_HWPROBE_IMA_ZKND;
- Features["zkne"] = ExtMask & RISCV_HWPROBE_IMA_ZKNE;
- Features["zknh"] = ExtMask & RISCV_HWPROBE_IMA_ZKNH;
- Features["zksed"] = ExtMask & RISCV_HWPROBE_IMA_ZKSED;
- Features["zksh"] = ExtMask & RISCV_HWPROBE_IMA_ZKSH;
- Features["zkt"] = ExtMask & RISCV_HWPROBE_IMA_ZKT;
- Features["zvbb"] = ExtMask & RISCV_HWPROBE_IMA_ZVBB;
- Features["zvbc"] = ExtMask & RISCV_HWPROBE_IMA_ZVBC;
- Features["zvkb"] = ExtMask & RISCV_HWPROBE_IMA_ZVKB;
- Features["zvkg"] = ExtMask & RISCV_HWPROBE_IMA_ZVKG;
- Features["zvkned"] = ExtMask & RISCV_HWPROBE_IMA_ZVKNED;
- Features["zvknha"] = ExtMask & RISCV_HWPROBE_IMA_ZVKNHA;
- Features["zvknhb"] = ExtMask & RISCV_HWPROBE_IMA_ZVKNHB;
- Features["zvksed"] = ExtMask & RISCV_HWPROBE_IMA_ZVKSED;
- Features["zvksh"] = ExtMask & RISCV_HWPROBE_IMA_ZVKSH;
- Features["zvkt"] = ExtMask & RISCV_HWPROBE_IMA_ZVKT;
- Features["zfh"] = ExtMask & RISCV_HWPROBE_IMA_ZFH;
- Features["zfhmin"] = ExtMask & RISCV_HWPROBE_IMA_ZFHMIN;
- Features["zihintntl"] = ExtMask & RISCV_HWPROBE_IMA_ZIHINTNTL;
- Features["zvfh"] = ExtMask & RISCV_HWPROBE_IMA_ZVFH;
- Features["zvfhmin"] = ExtMask & RISCV_HWPROBE_IMA_ZVFHMIN;
- Features["zfa"] = ExtMask & RISCV_HWPROBE_IMA_ZFA;
- Features["ztso"] = ExtMask & RISCV_HWPROBE_IMA_ZTSO;
- Features["zacas"] = ExtMask & RISCV_HWPROBE_IMA_ZACAS;
- Features["zicond"] = ExtMask & RISCV_HWPROBE_IMA_ZICOND;
- Features["zihintpause"] = ExtMask & RISCV_HWPROBE_IMA_ZIHINTPAUSE;
-
- uint64_t MisalignedMask = Query[1].value;
- if (MisalignedMask == RISCV_HWPROBE_MISALIGNED_FAST) {
- Features["unaligned-scalar-mem"] = true;
- Features["unaligned-vector-mem"] = true;
- }
+ uint64_t ExtMask = Query[0].Value;
+ Features["f"] = ExtMask & (1 << 0); // RISCV_HWPROBE_IMA_FD
+ Features["d"] = ExtMask & (1 << 0); // RISCV_HWPROBE_IMA_FD
+ Features["c"] = ExtMask & (1 << 1); // RISCV_HWPROBE_IMA_C
+ Features["v"] = ExtMask & (1 << 2); // RISCV_HWPROBE_IMA_V
+ Features["zba"] = ExtMask & (1 << 3); // RISCV_HWPROBE_EXT_ZBA
+ Features["zbb"] = ExtMask & (1 << 4); // RISCV_HWPROBE_EXT_ZBB
+ Features["zbs"] = ExtMask & (1 << 5); // RISCV_HWPROBE_EXT_ZBS
+ Features["zicboz"] = ExtMask & (1 << 6); // RISCV_HWPROBE_EXT_ZICBOZ
+ Features["zbc"] = ExtMask & (1 << 7); // RISCV_HWPROBE_EXT_ZBC
+ Features["zbkb"] = ExtMask & (1 << 8); // RISCV_HWPROBE_EXT_ZBKB
+ Features["zbkc"] = ExtMask & (1 << 9); // RISCV_HWPROBE_EXT_ZBKC
+ Features["zbkx"] = ExtMask & (1 << 10); // RISCV_HWPROBE_EXT_ZBKX
+ Features["zknd"] = ExtMask & (1 << 11); // RISCV_HWPROBE_EXT_ZKND
+ Features["zkne"] = ExtMask & (1 << 12); // RISCV_HWPROBE_EXT_ZKNE
+ Features["zknh"] = ExtMask & (1 << 13); // RISCV_HWPROBE_EXT_ZKNH
+ Features["zksed"] = ExtMask & (1 << 14); // RISCV_HWPROBE_EXT_ZKSED
+ Features["zksh"] = ExtMask & (1 << 15); // RISCV_HWPROBE_EXT_ZKSH
+ Features["zkt"] = ExtMask & (1 << 16); // RISCV_HWPROBE_EXT_ZKT
+ Features["zvbb"] = ExtMask & (1 << 17); // RISCV_HWPROBE_EXT_ZVBB
+ Features["zvbc"] = ExtMask & (1 << 18); // RISCV_HWPROBE_EXT_ZVBC
+ Features["zvkb"] = ExtMask & (1 << 19); // RISCV_HWPROBE_EXT_ZVKB
+ Features["zvkg"] = ExtMask & (1 << 20); // RISCV_HWPROBE_EXT_ZVKG
+ Features["zvkned"] = ExtMask & (1 << 21); // RISCV_HWPROBE_EXT_ZVKNED
+ Features["zvknha"] = ExtMask & (1 << 22); // RISCV_HWPROBE_EXT_ZVKNHA
+ Features["zvknhb"] = ExtMask & (1 << 23); // RISCV_HWPROBE_EXT_ZVKNHB
+ Features["zvksed"] = ExtMask & (1 << 24); // RISCV_HWPROBE_EXT_ZVKSED
+ Features["zvksh"] = ExtMask & (1 << 25); // RISCV_HWPROBE_EXT_ZVKSH
+ Features["zvkt"] = ExtMask & (1 << 26); // RISCV_HWPROBE_EXT_ZVKT
+ Features["zfh"] = ExtMask & (1 << 27); // RISCV_HWPROBE_EXT_ZFH
+ Features["zfhmin"] = ExtMask & (1 << 28); // RISCV_HWPROBE_EXT_ZFHMIN
+ Features["zihintntl"] = ExtMask & (1 << 29); // RISCV_HWPROBE_EXT_ZIHINTNTL
+ Features["zvfh"] = ExtMask & (1 << 30); // RISCV_HWPROBE_EXT_ZVFH
+ Features["zvfhmin"] = ExtMask & (1ULL << 31); // RISCV_HWPROBE_EXT_ZVFHMIN
+ Features["zfa"] = ExtMask & (1ULL << 32); // RISCV_HWPROBE_EXT_ZFA
+ Features["ztso"] = ExtMask & (1ULL << 33); // RISCV_HWPROBE_EXT_ZTSO
+ Features["zacas"] = ExtMask & (1ULL << 34); // RISCV_HWPROBE_EXT_ZACAS
+ Features["zicond"] = ExtMask & (1ULL << 35); // RISCV_HWPROBE_EXT_ZICOND
+ Features["zihintpause"] =
+ ExtMask & (1ULL << 36); // RISCV_HWPROBE_EXT_ZIHINTPAUSE
+
+ // TODO: set unaligned-scalar-mem if RISCV_HWPROBE_KEY_MISALIGNED_PERF returns
+ // RISCV_HWPROBE_MISALIGNED_FAST.
return true;
-#else
- return false;
-#endif
}
#else
bool sys::getHostCPUFeatures(StringMap<bool> &Features) { return false; }
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