math: Remove the SVID error handling from atanhf

It improves latency for about 1-10% and throughput for about 5-10%.

Tested on x86_64-linux-gnu and i686-linux-gnu.

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

math/Versions

@@ -691,6 +691,7 @@ libm {
     acosf;
     acoshf;
     asinf;
+    atanhf;
     log10f;
   }
 }

math/w_atanhf_compat.c

@@ -21,10 +21,10 @@
 #include <libm-alias-float.h>
 
 
-#if LIBM_SVID_COMPAT
+#if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_43)
 /* wrapper atanhf */
 float
-__atanhf (float x)
+__atanh_compatf (float x)
 {
   if (__builtin_expect (isgreaterequal (fabsf (x), 1.0f), 0)
       && _LIB_VERSION != _IEEE_)
@@ -35,5 +35,10 @@ __atanhf (float x)
 
   return __ieee754_atanhf (x);
 }
-libm_alias_float (__atanh, atanh)
+# ifdef NO_COMPAT_NEEDED
+strong_alias (__atanh_compatf, __atanhf)
+libm_alias_float (__atanh_compat, atanh)
+# else
+compat_symbol (libm, __atanh_compatf, atanhf, GLIBC_2_0);
+# endif
 #endif

sysdeps/ieee754/flt-32/e_atanhf.c

@@ -27,6 +27,8 @@ SOFTWARE.
 #include <math.h>
 #include <stdint.h>
 #include <libm-alias-finite.h>
+#include <libm-alias-float.h>
+#include <math-svid-compat.h>
 #include "math_config.h"
 
 static __attribute__((noinline)) float
@@ -42,7 +44,7 @@ as_special (float x)
 }
 
 float
-__ieee754_atanhf (float x)
+__atanhf (float x)
 {
   /* Calculate atanh(x) using the difference of two logarithms -- atanh(x) =
      (ln(1+x) - ln(1-x))/2  */
@@ -175,4 +177,11 @@ __ieee754_atanhf (float x)
     }
   return ub;
 }
+strong_alias (__atanhf, __ieee754_atanhf)
+#if LIBM_SVID_COMPAT
+versioned_symbol (libm, __atanhf, atanhf, GLIBC_2_43);
+libm_alias_float_other (__atanh, atanh)
+#else
+libm_alias_float (__atanh, atanh)
+#endif
 libm_alias_finite (__ieee754_atanhf, __atanhf)

sysdeps/ieee754/flt-32/w_atanhf.c

@@ -0,0 +1 @@
+/* Not needed.  */

sysdeps/m68k/m680x0/fpu/w_atanhf_compat.c

@@ -0,0 +1,8 @@
+/* m68k provides an optimized __ieee754_atanhf.  */
+#ifdef SHARED
+# define NO_COMPAT_NEEDED 1
+# include <math/w_atanhf_compat.c>
+#else
+# include <math-type-macros-float.h>
+# include <w_atanh_template.c>
+#endif

sysdeps/mach/hurd/i386/libm.abilist

@@ -1320,6 +1320,7 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 fmod F
 GLIBC_2.43 fmodf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/aarch64/libm.abilist

@@ -1288,4 +1288,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/alpha/libm.abilist

@@ -1447,4 +1447,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/arm/be/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/arm/le/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/hppa/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/i386/libm.abilist

@@ -1327,6 +1327,7 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 fmod F
 GLIBC_2.43 fmodf F
 GLIBC_2.43 log10f F

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

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/microblaze/be/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/microblaze/le/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/mips/mips32/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/mips/mips64/libm.abilist

@@ -1288,4 +1288,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist

@@ -1100,4 +1100,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist

@@ -1099,4 +1099,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libm.abilist

@@ -1093,4 +1093,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist

@@ -1477,4 +1477,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist

@@ -1391,4 +1391,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist

@@ -1391,4 +1391,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/sh/be/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/sh/le/libm.abilist

@@ -953,4 +953,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist

@@ -1398,4 +1398,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist

@@ -1288,4 +1288,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/x86_64/64/libm.abilist

@@ -1321,4 +1321,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F

sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist

@@ -1321,4 +1321,5 @@ GLIBC_2.42 rsqrtl F
 GLIBC_2.43 acosf F
 GLIBC_2.43 acoshf F
 GLIBC_2.43 asinf F
+GLIBC_2.43 atanhf F
 GLIBC_2.43 log10f F