[glibc/tuliom/libmvec] powerpc64: Add support for vec_cmpne for older compilers

[Tulio Magno Quites Machado Filho]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d91313ed6fb18acfb4f7b0399fd18e87f5c00221

commit d91313ed6fb18acfb4f7b0399fd18e87f5c00221
Author: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Date:   Wed Jul 3 16:17:27 2019 -0300

    powerpc64: Add support for vec_cmpne for older compilers
    
    vec_cmpne was added to GCC 7, requiring an alternative implementation
    when building glibc with GCC 6.

Diff:
---
 sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_dbl.h | 11 +++++++++++
 sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_flt.h | 11 +++++++++++
 2 files changed, 22 insertions(+)

diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_dbl.h b/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_dbl.h
index 7c94f5b..e1ef3a2 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_dbl.h
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_dbl.h
@@ -45,6 +45,17 @@
 # define TOINT_INTRINSICS 0
 #endif
 
+/* vec_cmpne was included in GCC 7.
+   TODO: Remove this when the minimum required GCC version is >= 7.  */
+#ifndef vec_cmpne
+static inline vector bool long long
+vec_cmpne (vector unsigned long long a, vector unsigned long long b)
+{
+  vector bool long long tmp = vec_cmpeq (a, b);
+  return vec_nor (tmp, tmp);
+}
+#endif
+
 #if TOINT_INTRINSICS
 /* Round x to nearest int in all rounding modes, ties have to be rounded
    consistently with converttoint so the results match.  If the result
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_flt.h b/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_flt.h
index 18f3419..34345d5 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_flt.h
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/math_config_flt.h
@@ -44,6 +44,17 @@
 # define TOINT_INTRINSICS 0
 #endif
 
+/* vec_cmpne was included in GCC 7.
+   TODO: Remove this when the minimum required GCC version is >= 7.  */
+#ifndef vec_cmpne
+static inline vector bool int
+vec_cmpne (vector unsigned a, vector unsigned b)
+{
+  vector bool int tmp = vec_cmpeq (a, b);
+  return vec_nor (tmp, tmp);
+}
+#endif
+
 #if TOINT_INTRINSICS
 /* Round x to nearest int in all rounding modes, ties have to be rounded
    consistently with converttoint so the results match.  If the result