[glibc/azanella/hypot-refactor] math: Add math-use-builtinds-fmin.h

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8946dd63ad96602458277b6f76edf19f9382f31b

commit 8946dd63ad96602458277b6f76edf19f9382f31b
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Dec 1 10:44:58 2021 -0300

    math: Add math-use-builtinds-fmin.h
    
    It allows the architecture to use the builtin instead of generic
    implementation.

Diff:
---
 math/s_fmin_template.c                   | 27 +++++++++++++++++++++++++++
 sysdeps/generic/math-use-builtins-fmin.h |  4 ++++
 sysdeps/generic/math-use-builtins.h      |  1 +
 3 files changed, 32 insertions(+)

diff --git a/math/s_fmin_template.c b/math/s_fmin_template.c
index 565a836266..27c2382f59 100644
--- a/math/s_fmin_template.c
+++ b/math/s_fmin_template.c
@@ -17,11 +17,38 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <math.h>
+#include <math-use-builtins.h>
+
+#if __HAVE_FLOAT128
+# define USE_BUILTIN_F128 , _Float128 : USE_FMAXF128_BUILTIN
+# define BUILTIN_F128     , _Float128 : __builtin_fminf128
+#else
+# define USE_BUILTIN_F128
+# define BUILTIN_F128
+#endif
+
+#define USE_BUILTIN(X, Y)                   \
+  _Generic((X),                             \
+	   float       : USE_FMAXF_BUILTIN, \
+	   double      : USE_FMAX_BUILTIN,  \
+	   long double : USE_FMAXL_BUILTIN  \
+	   USE_BUILTIN_F128)
+
+#define BUILTIN(X, Y)                       \
+  _Generic((X),                             \
+	   float       : __builtin_fminf,   \
+	   double      : __builtin_fmin,    \
+	   long double : __builtin_fminl    \
+	   BUILTIN_F128)                    \
+  (X, Y)
 
 
 FLOAT
 M_DECL_FUNC (__fmin) (FLOAT x, FLOAT y)
 {
+  if (USE_BUILTIN (x, y))
+    return BUILTIN (x, y);
+
   if (islessequal (x, y))
     return x;
   else if (isgreater (x, y))
diff --git a/sysdeps/generic/math-use-builtins-fmin.h b/sysdeps/generic/math-use-builtins-fmin.h
new file mode 100644
index 0000000000..d2383ce00c
--- /dev/null
+++ b/sysdeps/generic/math-use-builtins-fmin.h
@@ -0,0 +1,4 @@
+#define USE_FMIN_BUILTIN 0
+#define USE_FMINF_BUILTIN 0
+#define USE_FMINL_BUILTIN 0
+#define USE_FMINF128_BUILTIN 0
diff --git a/sysdeps/generic/math-use-builtins.h b/sysdeps/generic/math-use-builtins.h
index e07bba242f..24fba47575 100644
--- a/sysdeps/generic/math-use-builtins.h
+++ b/sysdeps/generic/math-use-builtins.h
@@ -35,5 +35,6 @@
 #include <math-use-builtins-sqrt.h>
 #include <math-use-builtins-fma.h>
 #include <math-use-builtins-fmax.h>
+#include <math-use-builtins-fmin.h>
 
 #endif /* MATH_USE_BUILTINS_H  */