1 files changed, 37 insertions, 0 deletions
diff --git a/sysdeps/loongarch/fpu/w_ilogb-impl.h b/sysdeps/loongarch/fpu/w_ilogb-impl.h
new file mode 100644
index 0000000..1905373
--- /dev/null
+++ b/sysdeps/loongarch/fpu/w_ilogb-impl.h
@@ -0,0 +1,37 @@
+/* Get integer exponent of a floating-point value.  LoongArch version.
+   Copyright (C) 2022-2025 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 <fpu_control.h>
+
+static inline RET_TYPE
+IMPL_NAME (double x)
+{
+  int x_cond;
+  asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+
+  if (__glibc_unlikely (x_cond & _FCLASS_ZERO))
+    return RET_INVALID (RET_LOGB0);
+  else if (__glibc_unlikely (x_cond & ( _FCLASS_NAN | _FCLASS_INF)))
+    return RET_INVALID (RET_LOGBNAN);
+  else
+    {
+      asm volatile ("fabs.d \t%0, %1" : "=f" (x) : "f" (x));
+      asm volatile ("flogb.d \t%0, %1" : "=f" (x) : "f" (x));
+      return x;
+    }
+}