diff --git a/sysdeps/powerpc/powerpc64/le/fpu/e_ilogb.c b/sysdeps/powerpc/powerpc64/le/fpu/e_ilogb.c
deleted file mode 100644
index 89e7498266..0000000000
--- a/sysdeps/powerpc/powerpc64/le/fpu/e_ilogb.c
+++ /dev/null
@@ -1,41 +0,0 @@
-/* Get integer exponent of a floating-point value.
-   Copyright (C) 1999-2025 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 <limits.h>
-#include <math.h>
-#include <stdbit.h>
-#include "math_config.h"
-
-int
-__ieee754_ilogb (double x)
-{
-  uint64_t ux = asuint64 (x);
-  int ex = (ux & ~SIGN_MASK) >> MANTISSA_WIDTH;
-  if (ex == 0) /* zero or subnormal */
-    {
-      /* Clear sign and exponent */
-      ux <<= 12;
-      if (ux == 0)
-	return FP_ILOGB0;
-      /* subnormal  */
-      return -1023 - stdc_leading_zeros (ux);
-    }
-  if (ex == EXPONENT_MASK >> MANTISSA_WIDTH) /* NaN or Inf */
-    return ux << 12 ? FP_ILOGBNAN : INT_MAX;
-  return ex - 1023;
-}
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf.c b/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf.c
deleted file mode 100644
index 1c2a8a5ade..0000000000
--- a/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf.c
+++ /dev/null
@@ -1,41 +0,0 @@
-/* Get integer exponent of a floating-point value.
-   Copyright (C) 1999-2025 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 <limits.h>
-#include <math.h>
-#include <stdbit.h>
-#include "sysdeps/ieee754/flt-32/math_config.h"
-
-int
-__ieee754_ilogbf (float x)
-{
-  uint32_t ux = asuint (x);
-  int ex = (ux & ~SIGN_MASK) >> MANTISSA_WIDTH;
-  if (ex == 0) /* zero or subnormal */
-    {
-      /* Clear sign and exponent.  */
-      ux <<= 1 + EXPONENT_WIDTH;
-      if (ux == 0)
-	return FP_ILOGB0;
-      /* sbunormal */
-      return -127 - stdc_leading_zeros (ux);
-    }
-  if (ex == EXPONENT_MASK >> MANTISSA_WIDTH) /* NaN or Inf */
-    return ux << (1 + EXPONENT_WIDTH) ? FP_ILOGBNAN : INT_MAX;
-  return ex - 127;
-}
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf128.c b/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf128.c
new file mode 100644
index 0000000000..4ec3582ae4
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf128.c
@@ -0,0 +1 @@
+/* Not needed, implemented at w_ilogbf128.c */
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/e_llogbf128.c b/sysdeps/powerpc/powerpc64/le/fpu/e_llogbf128.c
new file mode 100644
index 0000000000..163d9e2523
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/fpu/e_llogbf128.c
@@ -0,0 +1 @@
+/* Not needed, implemented at w_llogbf128.c */
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
index 6d74f09912..72adc6463b 100644
--- a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
@@ -90,7 +90,7 @@ gen-libm-f128-ifunc-routines = \
 	e_acosf128 e_acoshf128 e_asinf128 e_atan2f128 e_atanhf128 e_coshf128 \
 	e_expf128 e_fmodf128 e_hypotf128 e_j0f128 e_j1f128 e_jnf128 \
 	e_lgammaf128_r e_logf128 e_log10f128 e_powf128 e_remainderf128 \
-	e_sinhf128 e_sqrtf128 e_gammaf128_r e_ilogbf128 k_tanf128 s_asinhf128 \
+	e_sinhf128 e_sqrtf128 e_gammaf128_r k_tanf128 s_asinhf128 \
 	s_atanf128 s_cbrtf128 s_ceilf128 s_cosf128 s_erff128 s_exp10m1f128 \
 	s_exp2m1f128 s_expm1f128 \
 	s_fabsf128 s_floorf128 s_log1pf128 s_logbf128 \
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogb.c b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogb.c
deleted file mode 100644
index 9c26217021..0000000000
--- a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogb.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#include <math-type-macros-double.h>
-#include <w_ilogb_template.c>
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogb_template.c b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogb_template.c
deleted file mode 100644
index b5c1c0aa9d..0000000000
--- a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogb_template.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include <math.h>
-#include <errno.h>
-#include <limits.h>
-#include <math_private.h>
-#include <fenv.h>
-
-#if _GL_HAS_BUILTIN_ILOGB
-int
-M_DECL_FUNC (__ilogb) (FLOAT x)
-{
-  int r;
-  /* Check for exceptional cases.  */
-  if (! M_SUF(__builtin_test_dc_ilogb) (x, 0x7f))
-    r = M_SUF (__builtin_ilogb) (x);
-  else
-    /* Fallback to the generic ilogb if x is NaN, Inf or subnormal.  */
-    r = M_SUF (__ieee754_ilogb) (x);
-  if (__builtin_expect (r == FP_ILOGB0, 0)
-      || __builtin_expect (r == FP_ILOGBNAN, 0)
-      || __builtin_expect (r == INT_MAX, 0))
-    {
-      __set_errno (EDOM);
-      __feraiseexcept (FE_INVALID);
-    }
-  return r;
-}
-declare_mgen_alias (__ilogb, ilogb)
-#else
-#include <math/w_ilogb_template.c>
-#endif
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf.c b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf.c
deleted file mode 100644
index 047ad4bf11..0000000000
--- a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#include <math-type-macros-float.h>
-#include <w_ilogb_template.c>
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128-impl.h b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128-impl.h
new file mode 100644
index 0000000000..dff5331331
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128-impl.h
@@ -0,0 +1,57 @@
+/* Get integer exponent of a floating-point value.
+   Copyright (C) 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/>.  */
+
+/* Use the double version of EDOM/invalid operation handling.  */
+#include "math_config.h"
+
+static RET_TYPE
+llogb_nan_inf_subnormal (uint64_t hx, uint64_t lx)
+{
+  if (hx <= 0x0001000000000000ULL)
+    {
+      /* Zero or subnormal.  */
+      if ((hx | lx) == 0)
+	return RET_INVALID (RET_LOGB0);
+      /* Subnormal */
+      if (hx == 0)
+	return -16431L - stdc_leading_zeros (lx);
+      else
+	return -16382L - stdc_leading_zeros (hx << 15);
+    }
+  return RET_INVALID (RET_LOGBNAN);
+}
+
+static inline RET_TYPE
+IMPL_NAME (FLOAT x)
+{
+  uint64_t hx, lx;
+  GET_FLOAT128_WORDS64 (hx, lx, x);
+  hx &= 0x7fffffffffffffffULL;
+
+#if _GL_HAS_BUILTIN_ILOGB
+  /* Check for exceptional cases.  */
+  if (__glibc_likely (! M_SUF(__builtin_test_dc_ilogb) (x, 0x7f)))
+    return M_SUF (__builtin_ilogb) (x);
+#else
+  if (__glibc_likely (hx < 0x7fff000000000000ULL
+		      && hx > 0x0001000000000000ULL))
+    return (hx >> 48) - 0x3fff;
+#endif
+
+  return llogb_nan_inf_subnormal (hx, lx);
+}
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128-power9.c b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128-power9.c
new file mode 100644
index 0000000000..9de3f2101e
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128-power9.c
@@ -0,0 +1 @@
+#include "w_ilogbf128.c"
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128.c b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128.c
new file mode 100644
index 0000000000..ae3e4a9e48
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/fpu/w_ilogbf128.c
@@ -0,0 +1,51 @@
+/* Get integer exponent of a floating-point value.
+   Copyright (C) 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 <math-type-macros-float128.h>
+#include <math.h>
+#include <math_private.h>
+#include <stdbit.h>
+
+#ifdef DEF_AS_LLOGBF128
+# define DECL_NAME   __llogb
+# define FUNC_NAME   llogb
+# define RET_TYPE    long int
+# define RET_LOGB0   FP_LLOGB0
+# define RET_LOGBNAN FP_LLOGBNAN
+# define RET_LOGMAX  LONG_MAX
+# define RET_INVALID __math_invalid_li
+#else
+# define DECL_NAME   __ilogb
+# define FUNC_NAME   ilogb
+# define RET_TYPE    int
+# define RET_LOGB0   FP_ILOGB0
+# define RET_LOGBNAN FP_ILOGBNAN
+# define RET_LOGMAX  INT_MAX
+# define RET_INVALID __math_invalid_i
+#endif
+#define __IMPL_NAME(x,y) x ## _ ## y
+#define _IMPL_NAME(x,y)  __IMPL_NAME(x,y)
+#define IMPL_NAME        _IMPL_NAME(FUNC_NAME, impl)
+#include <w_ilogbf128-impl.h>
+
+RET_TYPE
+M_DECL_FUNC (DECL_NAME) (FLOAT x)
+{
+  return IMPL_NAME (x);
+}
+declare_mgen_alias (DECL_NAME, FUNC_NAME)
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_llogb.c b/sysdeps/powerpc/powerpc64/le/fpu/w_llogb.c
deleted file mode 100644
index 5e8891a668..0000000000
--- a/sysdeps/powerpc/powerpc64/le/fpu/w_llogb.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#include <math-type-macros-double.h>
-#include <w_llogb_template.c>
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf.c b/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf.c
deleted file mode 100644
index edb7e9a9e6..0000000000
--- a/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#include <math-type-macros-float.h>
-#include <w_llogb_template.c>
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf128-power9.c b/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf128-power9.c
new file mode 100644
index 0000000000..9550611b95
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf128-power9.c
@@ -0,0 +1 @@
+#include "w_llogbf128.c"
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf128.c b/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf128.c
new file mode 100644
index 0000000000..0a67251faa
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/fpu/w_llogbf128.c
@@ -0,0 +1,2 @@
+#define DEF_AS_LLOGBF128
+#include "w_ilogbf128.c"
