diff --git a/c_check b/c_check
index 94b0bf36e..c4aa2d420 100644
--- a/c_check
+++ b/c_check
@@ -3,6 +3,7 @@
 # Checking cross compile
 $hostos   = `uname -s | sed -e s/\-.*//`;    chop($hostos);
 $hostarch = `uname -m | sed -e s/i.86/x86/`;chop($hostarch);
+$hostarch = "x86_64" if ($hostarch eq "amd64");
 
 $binary = $ENV{"BINARY"};
 
diff --git a/f_check b/f_check
index 90ae2fe97..5719faff1 100644
--- a/f_check
+++ b/f_check
@@ -16,6 +16,7 @@ $config   = shift(@ARGV);
 $nofortran = 0;
 
 $compiler = join(" ", @ARGV);
+$compiler_bin = shift(@ARGV);
 
 # f77 is too ambiguous
 $compiler = "" if $compiler eq "f77";
@@ -53,7 +54,7 @@ if ($compiler eq "") {
 
 } else {
 
-    $data = `which $compiler > /dev/null 2> /dev/null`;
+    $data = `which $compiler_bin > /dev/null 2> /dev/null`;
     $vendor = "";
 
     if (!$?) {
@@ -204,7 +205,7 @@ if ($compiler eq "") {
     }
 }
 
-$data = `which $compiler > /dev/null 2> /dev/null`;
+$data = `which $compiler_bin > /dev/null 2> /dev/null`;
 
 if (!$?) {
 
diff --git a/kernel/x86_64/sgemm_kernel_16x4_sandy.S b/kernel/x86_64/sgemm_kernel_16x4_sandy.S
index e6c4126b9..77c7e2f50 100644
--- a/kernel/x86_64/sgemm_kernel_16x4_sandy.S
+++ b/kernel/x86_64/sgemm_kernel_16x4_sandy.S
@@ -726,8 +726,8 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #if !defined(TRMMKERNEL)
 
-	vaddps 	        (CO1), %xmm4,%xmm4
-	vaddps  1 * SIZE(CO1), %xmm5,%xmm5
+	vaddss 	        (CO1), %xmm4,%xmm4
+	vaddss  1 * SIZE(CO1), %xmm5,%xmm5
 
 #endif
 
@@ -756,7 +756,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #if !defined(TRMMKERNEL)
 
-	vaddps 	        (CO1), %xmm4,%xmm4
+	vaddss 	        (CO1), %xmm4,%xmm4
 
 #endif