m68k: Remove the SVID error handling from fmodf

The m68k provided an optimized version through __m81_u(fmodf)
(mathimpl.h), and gcc does not implement it through a builtin
(different than i386).

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>

sysdeps/m68k/m680x0/fpu/Versions

@@ -0,0 +1,6 @@
+libm {
+  GLIBC_2.43 {
+    # No SVID compatible error handling.
+    fmodf;
+  }
+}

sysdeps/m68k/m680x0/fpu/e_fmodf.c

@@ -1,6 +1,42 @@
-#ifndef FUNC
+/* Floating-point remainder function.
-# define FUNC __ieee754_fmodf
+   Copyright (C) 2014-2025 Free Software Foundation, Inc.
-# define FUNC_FINITE __fmodf
+   This file is part of the GNU C Library.
-#endif
+
-#define float_type float
+   The GNU C Library is free software; you can redistribute it and/or
-#include <e_fmod.c>
+   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 <libm-alias-finite.h>
+#include <libm-alias-float.h>
+#include <math.h>
+#include "mathimpl.h"
+#include "sysdeps/ieee754/flt-32/math_config.h"
+
+float
+__fmodf (float x, float y)
+{
+  uint32_t hx = asuint (x);
+  uint32_t hy = asuint (y);
+
+  /* fmod(+-Inf,y) or fmod(x,0) */
+  if (__glibc_unlikely ((is_inf (hx) || y == 0.0f)
+			&& !is_nan (hy)
+			&& !is_nan (hx)))
+    return __math_invalidf (x);
+
+  return __m81_u(fmodf)(x, y);
+}
+strong_alias (__fmodf, __ieee754_fmodf)
+versioned_symbol (libm, __fmodf, fmodf, GLIBC_2_43);
+libm_alias_float_other (__fmod, fmod)
+libm_alias_finite (__ieee754_fmodf, __fmodf)

sysdeps/m68k/m680x0/fpu/e_remainderf.c

@@ -1,3 +1,4 @@
 #define FUNC __ieee754_remainderf
 #define FUNC_FINITE __remainderf
-#include <e_fmodf.c>
+#define float_type float
+#include <e_fmod.c>

sysdeps/m68k/m680x0/fpu/w_fmodf_compat.c

@@ -1,15 +0,0 @@
-/* m68k provides an optimized __ieee752_fmodf.  */
-#include <math-svid-compat.h>
-#ifdef SHARED
-# undef SHLIB_COMPAT
-# define SHLIB_COMPAT(a, b, c) 1
-# undef LIBM_SVID_COMPAT
-# define LIBM_SVID_COMPAT 1
-# undef compat_symbol
-# define compat_symbol(a, b, c, d)
-# include <math/w_fmodf_compat.c>
-libm_alias_float (__fmod_compat, fmod)
-#else
-#include <math-type-macros-float.h>
-#include <w_fmod_template.c>
-#endif

sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist

@@ -986,3 +986,4 @@ GLIBC_2.42 rsqrtf32 F
 GLIBC_2.42 rsqrtf32x F
 GLIBC_2.42 rsqrtf64 F
 GLIBC_2.42 rsqrtl F
+GLIBC_2.43 fmodf F