*.c: Check for ARM64 SIMD before using the accelerated code.

I don't expect ARM64 processors to omit the SIMD instructions, but it's
convenient to have a way to inhibit the accelerated code (e.g., for
performance measurement).

diff --git a/math/mpmont.c b/math/mpmont.c
index 6109c8569770fe82a518cd31f90c221bbdcad39f..b4bf982e5e07261bac3ef116faa1ef3e673b0267 100644 (file)
--- a/math/mpmont.c
+++ b/math/mpmont.c
@@ -125,7 +125,8 @@ static redccore__functype *pick_redccore(void)
                     cpu_feature_p(CPUFEAT_ARM_NEON));
 #endif
 #if CPUFAM_ARM64
                     cpu_feature_p(CPUFEAT_ARM_NEON));
 #endif
 #if CPUFAM_ARM64

-  DISPATCH_PICK_COND(mpmont_reduce, maybe_redc4_arm64_simd, 1);
+  DISPATCH_PICK_COND(mpmont_reduce, maybe_redc4_arm64_simd,
+                    cpu_feature_p(CPUFEAT_ARM_NEON));

 #endif
   DISPATCH_PICK_FALLBACK(mpmont_reduce, simple_redccore);
 }
 #endif
   DISPATCH_PICK_FALLBACK(mpmont_reduce, simple_redccore);
 }


@@ -246,7 +247,8 @@ static mulcore__functype *pick_mulcore(void)
                     cpu_feature_p(CPUFEAT_ARM_NEON));
 #endif
 #if CPUFAM_ARM64
                     cpu_feature_p(CPUFEAT_ARM_NEON));
 #endif
 #if CPUFAM_ARM64

-  DISPATCH_PICK_COND(mpmont_mul, maybe_mul4_arm64_simd, 1);
+  DISPATCH_PICK_COND(mpmont_mul, maybe_mul4_arm64_simd,
+                    cpu_feature_p(CPUFEAT_ARM_NEON));

 #endif
   DISPATCH_PICK_FALLBACK(mpmont_mul, simple_mulcore);
 }
 #endif
   DISPATCH_PICK_FALLBACK(mpmont_mul, simple_mulcore);
 }

diff --git a/math/mpx.c b/math/mpx.c
index d3d0a04a88947c463234c8b89c57f0b4eed860e5..ac8268832949e82f0534aeca68fe58ad8686d69f 100644 (file)
--- a/math/mpx.c
+++ b/math/mpx.c
@@ -958,7 +958,8 @@ static mpx_umul__functype *pick_umul(void)
                     cpu_feature_p(CPUFEAT_ARM_NEON));
 #endif
 #if CPUFAM_ARM64
                     cpu_feature_p(CPUFEAT_ARM_NEON));
 #endif
 #if CPUFAM_ARM64

-  DISPATCH_PICK_COND(mpx_umul, maybe_umul4_arm64_simd, 1);
+  DISPATCH_PICK_COND(mpx_umul, maybe_umul4_arm64_simd,
+                    cpu_feature_p(CPUFEAT_ARM_NEON));

 #endif
   DISPATCH_PICK_FALLBACK(mpx_umul, simple_umul);
 }
 #endif
   DISPATCH_PICK_FALLBACK(mpx_umul, simple_umul);
 }