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authordengjianbo <dengjianbo@loongson.cn>2023-08-24 16:50:18 +0800
committercaiyinyu <caiyinyu@loongson.cn>2023-08-24 17:19:47 +0800
commit82d9426e4a1a500b90b05457574dee1afe1408f8 (patch)
tree56da9c4a7c8d98566e359c0a3a4c7f88b90132e2 /sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h
parente74d959862db0e97a1a186ffe606e8fb6c93c309 (diff)
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LoongArch: Add ifunc support for strcmp{aligned, lsx}
Based on the glibc microbenchmark, strcmp-aligned implementation could
reduce the runtime 0%-10% for aligned comparison, 10%-20% for unaligned
comparison, strcmp-lsx implemenation could reduce the runtime 0%-50%.
Diffstat (limited to 'sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h')
-rw-r--r--sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h b/sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h
new file mode 100644
index 0000000000..ca26352bec
--- /dev/null
+++ b/sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h
@@ -0,0 +1,38 @@
+/* Common definition for strcmp ifunc selection.
+   All versions must be listed in ifunc-impl-list.c.
+   Copyright (C) 2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <ldsodefs.h>
+#include <ifunc-init.h>
+
+#if !defined __loongarch_soft_float
+extern __typeof (REDIRECT_NAME) OPTIMIZE (lsx) attribute_hidden;
+#endif
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (aligned) attribute_hidden;
+
+static inline void *
+IFUNC_SELECTOR (void)
+{
+#if !defined __loongarch_soft_float
+  if (SUPPORT_LSX)
+    return OPTIMIZE (lsx);
+  else
+#endif
+    return OPTIMIZE (aligned);
+}