updated gemm kernels for armv7

kernel/arm/cgemm_kernel_2x2_vfpv3.S

@@ -73,6 +73,10 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define N	[fp, #-260 ]
 #define K	[fp, #-264 ]
 
+#define FP_ZERO [fp, #-240]
+#define FP_ZERO_0 [fp, # -240]
+#define FP_ZERO_1 [fp, # -236]
+
 #define ALPHA_I	[fp, #-272]
 #define ALPHA_R	[fp, #-280]
 
@@ -147,7 +151,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT2x2
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s18, s16
 	vmov.f32		s19, s16
@@ -368,7 +372,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT1x2
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s20, s16
 	vmov.f32		s21, s16
@@ -550,7 +554,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT2x1
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s18, s16
 	vmov.f32		s19, s16
@@ -730,7 +734,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT1x1
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s24, s16
 	vmov.f32		s25, s16
@@ -879,6 +883,10 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 	sub	r3, fp, #128
 	vstm	r3, { s8 - s31} 				// store floating point registers
 
+        movs    r4, #0
+        str     r4, FP_ZERO
+        str     r4, FP_ZERO_1
+
 	ldr	r3, OLD_LDC
 	lsl	r3, r3, #3					// ldc = ldc * 4 * 2
 	str	r3, LDC

kernel/arm/sgemm_kernel_4x4_vfpv3.S

@@ -73,7 +73,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define K	[fp, #-264 ]
 #define A	[fp, #-268 ]
 
-#define ALPHA	[fp, #-280]
+#define FP_ZERO [fp, #-240]
+#define FP_ZERO_0 [fp, #-240]
+#define FP_ZERO_1 [fp, #-236]
+
+#define ALPHA   [fp, #-280]
 
 #define B	[fp, #4 ]
 #define C	[fp, #8 ]
@@ -102,7 +106,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT4x4
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s18, s16
 	vmov.f32		s19, s16
@@ -349,7 +353,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT2x4
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s20, s16
 	vmov.f32		s21, s16
@@ -443,7 +447,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT1x4
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s20, s16
 	vmov.f32		s24, s16
 	vmov.f32		s28, s16
@@ -506,7 +510,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT4x2
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s18, s16
 	vmov.f32		s19, s16
@@ -590,7 +594,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT2x2
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s20, s16
 	vmov.f32		s21, s16
@@ -651,7 +655,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT1x2
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s20, s16
 
 .endm
@@ -696,7 +700,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT4x1
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 	vmov.f32		s18, s16
 	vmov.f32		s19, s16
@@ -755,7 +759,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT2x1
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 	vmov.f32		s17, s16
 
 .endm
@@ -799,7 +803,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT1x1
 
-	vsub.f32		s16 , s16 , s16
+	flds			s16, FP_ZERO
 
 .endm
 
@@ -856,6 +860,10 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 	sub	r3, fp, #128
 	vstm	r3, { s8 - s31} 				// store floating point registers
 
+        movs    r4, #0
+        str     r4, FP_ZERO
+        str     r4, FP_ZERO_1
+
 	ldr	r3, OLD_LDC
 	lsl	r3, r3, #2					// ldc = ldc * 4
 	str	r3, LDC

kernel/arm/zgemm_kernel_2x2_vfpv3.S

@@ -73,6 +73,10 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define N	[fp, #-260 ]
 #define K	[fp, #-264 ]
 
+#define FP_ZERO [fp, #-240]
+#define FP_ZERO_0 [fp, # -240]
+#define FP_ZERO_1 [fp, # -236]
+
 #define ALPHA_I	[fp, #-272]
 #define ALPHA_R	[fp, #-280]
 
@@ -147,7 +151,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT2x2
 
-	vsub.f64		d16 , d16 , d16
+	fldd			d16, FP_ZERO
 	vmov.f64		d17, d16
 	vmov.f64		d18, d16
 	vmov.f64		d19, d16
@@ -404,7 +408,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT1x2
 
-	vsub.f64		d16 , d16 , d16
+	fldd			d16, FP_ZERO
 	vmov.f64		d17, d16
 	vmov.f64		d20, d16
 	vmov.f64		d21, d16
@@ -586,7 +590,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT2x1
 
-	vsub.f64		d16 , d16 , d16
+	fldd			d16, FP_ZERO
 	vmov.f64		d17, d16
 	vmov.f64		d18, d16
 	vmov.f64		d19, d16
@@ -766,7 +770,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 .macro INIT1x1
 
-	vsub.f64		d16 , d16 , d16
+	fldd			d16, FP_ZERO
 	vmov.f64		d17, d16
 	vmov.f64		d24, d16
 	vmov.f64		d25, d16
@@ -915,6 +919,10 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 	sub	r3, fp, #128
 	vstm	r3, { d8 - d15} 				// store floating point registers
 
+        movs    r4, #0
+        str     r4, FP_ZERO
+        str     r4, FP_ZERO_1
+
 	ldr	r3, OLD_LDC
 	lsl	r3, r3, #4					// ldc = ldc * 8 * 2
 	str	r3, LDC