diff --git a/sysdeps/loongarch/fpu/e_ilogb.c b/sysdeps/loongarch/fpu/e_ilogb.c
new file mode 100644
index 0000000000..f9ada6921a
--- /dev/null
+++ b/sysdeps/loongarch/fpu/e_ilogb.c
@@ -0,0 +1,39 @@
+/* __ieee754_ilogb(). LoongArch version.
+ Copyright (C) 2022 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
+ . */
+
+#define NO_MATH_REDIRECT
+#include
+#include
+
+int
+__ieee754_ilogb (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 FP_ILOGB0;
+ else if (__glibc_unlikely (x_cond & ( _FCLASS_NAN | _FCLASS_INF)))
+ return FP_ILOGBNAN;
+ 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;
+ }
+}
diff --git a/sysdeps/loongarch/fpu/e_ilogbf.c b/sysdeps/loongarch/fpu/e_ilogbf.c
new file mode 100644
index 0000000000..e1da48ecfc
--- /dev/null
+++ b/sysdeps/loongarch/fpu/e_ilogbf.c
@@ -0,0 +1,39 @@
+/* __ieee754_ilogbf(). LoongArch version.
+ Copyright (C) 2022 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
+ . */
+
+#define NO_MATH_REDIRECT
+#include
+#include
+
+int
+__ieee754_ilogbf (float x)
+{
+ int x_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+
+ if (__glibc_unlikely (x_cond & _FCLASS_ZERO))
+ return FP_ILOGB0;
+ else if (__glibc_unlikely (x_cond & ( _FCLASS_NAN | _FCLASS_INF)))
+ return FP_ILOGBNAN;
+ else
+ {
+ asm volatile ("fabs.s \t%0, %1" : "=f" (x) : "f" (x));
+ asm volatile ("flogb.s \t%0, %1" : "=f" (x) : "f" (x));
+ return x;
+ }
+}