[PATCH v2 03/10] i386: Use generic fmod

[Adhemerval Zanella <adhemerval.zanella@linaro.org>]

The benchtest results shows a slight improvement (Ryzen 5900, gcc
13.2.1):

* sysdeps/i386/fpu/e_fmod.S:
  "fmod": {
   "subnormals": {
    "duration": 3.68855e+09,
    "iterations": 2.12608e+08,
    "max": 62.012,
    "min": 16.798,
    "mean": 17.349
   },
   "normal": {
    "duration": 3.88459e+09,
    "iterations": 7.168e+06,
    "max": 2879.12,
    "min": 16.909,
    "mean": 541.934
   },
   "close-exponents": {
    "duration": 3.692e+09,
    "iterations": 1.96608e+08,
    "max": 66.452,
    "min": 16.835,
    "mean": 18.7785
   }
  }

* generic
  "fmod": {
   "subnormals": {
    "duration": 3.68645e+09,
    "iterations": 2.2848e+08,
    "max": 66.896,
    "min": 15.91,
    "mean": 16.1347
   },
   "normal": {
    "duration": 4.1455e+09,
    "iterations": 8.192e+06,
    "max": 3376.18,
    "min": 15.873,
    "mean": 506.043
   },
   "close-exponents": {
    "duration": 3.70197e+09,
    "iterations": 2.08896e+08,
    "max": 69.597,
    "min": 15.947,
    "mean": 17.7216
   }
  }
---
 sysdeps/i386/fpu/Versions                 |  4 ++++
 sysdeps/i386/fpu/e_fmod.S                 | 18 ------------------
 sysdeps/i386/fpu/e_fmod.c                 |  2 ++
 sysdeps/i386/fpu/math_err.c               |  1 -
 sysdeps/i386/fpu/w_fmod_compat.c          | 15 ---------------
 sysdeps/ieee754/dbl-64/e_fmod.c           |  5 ++++-
 sysdeps/mach/hurd/i386/libm.abilist       |  1 +
 sysdeps/unix/sysv/linux/i386/libm.abilist |  1 +
 8 files changed, 12 insertions(+), 35 deletions(-)
 delete mode 100644 sysdeps/i386/fpu/e_fmod.S
 create mode 100644 sysdeps/i386/fpu/e_fmod.c
 delete mode 100644 sysdeps/i386/fpu/math_err.c
 delete mode 100644 sysdeps/i386/fpu/w_fmod_compat.c

diff --git a/sysdeps/i386/fpu/Versions b/sysdeps/i386/fpu/Versions
index a2eec371f1..d37bc1eae6 100644
--- a/sysdeps/i386/fpu/Versions
+++ b/sysdeps/i386/fpu/Versions
@@ -3,4 +3,8 @@ libm {
     # functions used in inline functions or macros
     __expl; __expm1l;
   }
+  GLIBC_2.40 {
+    # No SVID compatible error handling.
+    fmod;
+  }
 }
diff --git a/sysdeps/i386/fpu/e_fmod.S b/sysdeps/i386/fpu/e_fmod.S
deleted file mode 100644
index 86ac1bcfaf..0000000000
--- a/sysdeps/i386/fpu/e_fmod.S
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * Public domain.
- */
-
-#include <machine/asm.h>
-#include <libm-alias-finite.h>
-
-ENTRY(__ieee754_fmod)
-	fldl	12(%esp)
-	fldl	4(%esp)
-1:	fprem
-	fstsw	%ax
-	sahf
-	jp	1b
-	fstp	%st(1)
-	ret
-END (__ieee754_fmod)
-libm_alias_finite (__ieee754_fmod, __fmod)
diff --git a/sysdeps/i386/fpu/e_fmod.c b/sysdeps/i386/fpu/e_fmod.c
new file mode 100644
index 0000000000..3625758f97
--- /dev/null
+++ b/sysdeps/i386/fpu/e_fmod.c
@@ -0,0 +1,2 @@
+#define FMOD_VERSION GLIBC_2_40
+#include <sysdeps/ieee754/dbl-64/e_fmod.c>
diff --git a/sysdeps/i386/fpu/math_err.c b/sysdeps/i386/fpu/math_err.c
deleted file mode 100644
index 1cc8931700..0000000000
--- a/sysdeps/i386/fpu/math_err.c
+++ /dev/null
@@ -1 +0,0 @@
-/* Not needed.  */
diff --git a/sysdeps/i386/fpu/w_fmod_compat.c b/sysdeps/i386/fpu/w_fmod_compat.c
deleted file mode 100644
index 528bfc2a13..0000000000
--- a/sysdeps/i386/fpu/w_fmod_compat.c
+++ /dev/null
@@ -1,15 +0,0 @@
-/* i386 provides an optimized __ieee752_fmod.  */
-#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_fmod_compat.c>
-libm_alias_double (__fmod_compat, fmod)
-#else
-#include <math-type-macros-double.h>
-#include <w_fmod_template.c>
-#endif
diff --git a/sysdeps/ieee754/dbl-64/e_fmod.c b/sysdeps/ieee754/dbl-64/e_fmod.c
index b33cfb1223..7651cd212a 100644
--- a/sysdeps/ieee754/dbl-64/e_fmod.c
+++ b/sysdeps/ieee754/dbl-64/e_fmod.c
@@ -175,7 +175,10 @@ __fmod (double x, double y)
 strong_alias (__fmod, __ieee754_fmod)
 libm_alias_finite (__ieee754_fmod, __fmod)
 #if LIBM_SVID_COMPAT
-versioned_symbol (libm, __fmod, fmod, GLIBC_2_38);
+# ifndef FMOD_VERSION
+#  define FMOD_VERSION GLIBC_2_38
+# endif
+versioned_symbol (libm, __fmod, fmod, FMOD_VERSION);
 libm_alias_double_other (__fmod, fmod)
 #else
 libm_alias_double (__fmod, fmod)
diff --git a/sysdeps/mach/hurd/i386/libm.abilist b/sysdeps/mach/hurd/i386/libm.abilist
index 8f40ddb150..30665f8b1a 100644
--- a/sysdeps/mach/hurd/i386/libm.abilist
+++ b/sysdeps/mach/hurd/i386/libm.abilist
@@ -1181,3 +1181,4 @@ GLIBC_2.35 fsqrt F
 GLIBC_2.35 fsqrtl F
 GLIBC_2.35 hypot F
 GLIBC_2.35 hypotf F
+GLIBC_2.40 fmod F
diff --git a/sysdeps/unix/sysv/linux/i386/libm.abilist b/sysdeps/unix/sysv/linux/i386/libm.abilist
index 5d89aaa08e..44932f111d 100644
--- a/sysdeps/unix/sysv/linux/i386/libm.abilist
+++ b/sysdeps/unix/sysv/linux/i386/libm.abilist
@@ -1188,3 +1188,4 @@ GLIBC_2.35 fsqrt F
 GLIBC_2.35 fsqrtl F
 GLIBC_2.35 hypot F
 GLIBC_2.35 hypotf F
+GLIBC_2.40 fmod F
-- 
2.34.1