[PATCH] x86_64: Utilize vector math functions w/o -fopenmp

[Andrew Senkevich]

Hi,

this patch adds GCC 6.* __attribute__((__simd__)) to declaration of
vector math functions to utilize them w/o -fopenmp.

Libmvec wike page will be updated appropriately with example of usage
(w/o -fopenmp will be needed -ftree-loop-vectorize).

2015-12-04  Andrew Senkevich  <andrew.senkevich@intel.com>

        * sysdeps/x86/fpu/bits/math-vector.h: Add __attribute__((__simd__)) to
        vector functions declaration.

diff --git a/sysdeps/x86/fpu/bits/math-vector.h
b/sysdeps/x86/fpu/bits/math-vector.h
index f3bfb86..155d326 100644
--- a/sysdeps/x86/fpu/bits/math-vector.h
+++ b/sysdeps/x86/fpu/bits/math-vector.h
@@ -53,5 +53,32 @@
 #  undef __DECL_SIMD_powf
 #  define __DECL_SIMD_powf __DECL_SIMD_x86_64

+# elif __GNUC_PREREQ (6,0)
+/* W/o OpenMP use GCC 6.*  __attribute__((__simd__)).  */
+#  define __ATTR_SIMD_x86_64 __attribute__((__simd__("notinbranch")))
+#  undef __DECL_SIMD_cos
+#  define __DECL_SIMD_cos __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_cosf
+#  define __DECL_SIMD_cosf __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_sin
+#  define __DECL_SIMD_sin __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_sinf
+#  define __DECL_SIMD_sinf __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_sincos
+#  define __DECL_SIMD_sincos __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_sincosf
+#  define __DECL_SIMD_sincosf __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_log
+#  define __DECL_SIMD_log __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_logf
+#  define __DECL_SIMD_logf __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_exp
+#  define __DECL_SIMD_exp __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_expf
+#  define __DECL_SIMD_expf __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_pow
+#  define __DECL_SIMD_pow __ATTR_SIMD_x86_64
+#  undef __DECL_SIMD_powf
+#  define __DECL_SIMD_powf __ATTR_SIMD_x86_64
 # endif
 #endif

Is it Ok for trunk?


--
WBR,
Andrew