on x86_64 enable sha512, ecc, and increase max_bits by default

configure.ac

@@ -522,11 +522,18 @@ fi
 AM_CONDITIONAL([BUILD_BLAKE2], [test "x$ENABLED_BLAKE2" = "xyes"])
 
 
+# set sha512 default
+SHA512_DEFAULT=no
+if test "$host_cpu" = "x86_64"
+then
+SHA512_DEFAULT=yes
+fi
+
 # SHA512
 AC_ARG_ENABLE([sha512],
-    [  --enable-sha512         Enable wolfSSL SHA-512 support (default: disabled)],
+    [AS_HELP_STRING([--enable-sha512],[Enable wolfSSL SHA-512 support (default: enabled on x86_64)])],
     [ ENABLED_SHA512=$enableval ],
-    [ ENABLED_SHA512=no ]
+    [ ENABLED_SHA512=$SHA512_DEFAULT ]
     )
 
 if test "$ENABLED_SHA512" = "yes"
@@ -638,11 +645,19 @@ fi
 AM_CONDITIONAL([BUILD_DSA], [test "x$ENABLED_DSA" = "xyes"])
 
 
+# set ecc default
+ECC_DEFAULT=no
+
+if test "$host_cpu" = "x86_64"
+then
+ECC_DEFAULT=yes
+fi
+
 # ECC
 AC_ARG_ENABLE([ecc],
-    [  --enable-ecc            Enable ECC (default: disabled)],
+    [AS_HELP_STRING([--enable-ecc],[Enable ECC (default: enabled on x86_64)])],
     [ ENABLED_ECC=$enableval ],
-    [ ENABLED_ECC=no ]
+    [ ENABLED_ECC=$ECC_DEFAULT ]
     )
 
 if test "$ENABLED_ECC" = "yes"
@@ -1677,6 +1692,11 @@ then
         AM_CFLAGS="$AM_CFLAGS -DUSE_FAST_MATH"
         ENABLED_SLOWMATH="no"
     fi
+    if test "$host_cpu" = "x86_64"
+    then
+        # Have settings.h set FP_MAX_BITS higher if user didn't set directly
+        AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_X86_64_BUILD"
+    fi
 fi
 
 

wolfssl/wolfcrypt/settings.h

@@ -748,6 +748,14 @@
     #endif
 #endif
 
+/* if desktop type system and fastmath increase default max bits */
+#ifdef WOLFSSL_X86_64_BUILD
+    #ifdef USE_FAST_MATH
+        #ifndef FP_MAX_BITS
+            #define FP_MAX_BITS 8192
+        #endif
+    #endif
+#endif
 
 /* Place any other flags or defines here */