arm: add softfp support in cgemm/ctrmm vfp kernels

kernel/arm/KERNEL.ARMV6

@@ -98,7 +98,9 @@ DGEMMOTCOPYOBJ = dgemm_otcopy.o
 
 STRMMKERNEL    = strmm_kernel_4x2_vfp.S
 DTRMMKERNEL    = dtrmm_kernel_4x2_vfp.S
+CTRMMKERNEL    = ctrmm_kernel_2x2_vfp.S
 
+CGEMMKERNEL    = cgemm_kernel_2x2_vfp.S
 CGEMMONCOPY    = cgemm_ncopy_2_vfp.S
 CGEMMOTCOPY    = cgemm_tcopy_2_vfp.S
 CGEMMONCOPYOBJ = cgemm_oncopy.o
@@ -111,10 +113,8 @@ ZGEMMOTCOPYOBJ = zgemm_otcopy.o
 
 ifeq ($(ARM_ABI),hard)
 
-CTRMMKERNEL    = ctrmm_kernel_2x2_vfp.S
 ZTRMMKERNEL    = ztrmm_kernel_2x2_vfp.S
 
-CGEMMKERNEL    = cgemm_kernel_2x2_vfp.S
 ZGEMMKERNEL    = zgemm_kernel_2x2_vfp.S
 
 endif

kernel/arm/KERNEL.ARMV7

@@ -10,6 +10,7 @@ DGEMVNKERNEL = gemv_n_vfpv3.S
 
 STRMMKERNEL  =  strmm_kernel_4x4_vfpv3.S
 DTRMMKERNEL  =  dtrmm_kernel_4x4_vfpv3.S
+CTRMMKERNEL  =  ctrmm_kernel_2x2_vfpv3.S
 
 SGEMMKERNEL    =  sgemm_kernel_4x4_vfpv3.S
 SGEMMONCOPY    =  sgemm_ncopy_4_vfp.S
@@ -23,12 +24,12 @@ DGEMMOTCOPY    =  dgemm_tcopy_4_vfp.S
 DGEMMONCOPYOBJ = dgemm_oncopy.o
 DGEMMOTCOPYOBJ = dgemm_otcopy.o
 
+CGEMMKERNEL    = cgemm_kernel_2x2_vfpv3.S
+
 ifeq ($(ARM_ABI),hard)
 
-CTRMMKERNEL  =  ctrmm_kernel_2x2_vfpv3.S
 ZTRMMKERNEL  =  ztrmm_kernel_2x2_vfpv3.S
 
-CGEMMKERNEL    = cgemm_kernel_2x2_vfpv3.S
 ZGEMMKERNEL    = zgemm_kernel_2x2_vfpv3.S
 
 endif

kernel/arm/cgemm_kernel_2x2_vfp.S

@@ -64,9 +64,18 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ALPHA_I	[fp, #-272]
 #define ALPHA_R	[fp, #-280]
 
+#if !defined(__ARM_PCS_VFP)
+#define OLD_ALPHAR_SOFTFP	r3
+#define OLD_ALPHAI_SOFTFP	[fp, #4]
+#define OLD_A_SOFTFP	[fp, #8 ]
+#define B	[fp, #12 ]
+#define C	[fp, #16 ]
+#define OLD_LDC	[fp, #20 ]
+#else
 #define B	[fp, #4 ]
 #define C	[fp, #8 ]
 #define OLD_LDC	[fp, #12 ]
+#endif
 
 #define I	r0
 #define J	r1
@@ -816,6 +825,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 	add	fp, sp, #24
 	sub	sp, sp, #STACKSIZE				// reserve stack
 
+#if !defined(__ARM_PCS_VFP)
+	vmov	OLD_ALPHA_R, OLD_ALPHAR_SOFTFP
+	vldr	OLD_ALPHA_I, OLD_ALPHAI_SOFTFP
+	ldr	OLD_A, OLD_A_SOFTFP
+#endif
 	str	OLD_M, M
 	str	OLD_N, N
 	str	OLD_K, K

kernel/arm/cgemm_kernel_2x2_vfpv3.S

@@ -80,9 +80,18 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ALPHA_I	[fp, #-272]
 #define ALPHA_R	[fp, #-280]
 
+#if !defined(__ARM_PCS_VFP)
+#define OLD_ALPHAR_SOFTFP	r3
+#define OLD_ALPHAI_SOFTFP	[fp, #4]
+#define OLD_A_SOFTFP	[fp, #8 ]
+#define B	[fp, #12 ]
+#define C	[fp, #16 ]
+#define OLD_LDC	[fp, #20 ]
+#else
 #define B	[fp, #4 ]
 #define C	[fp, #8 ]
 #define OLD_LDC	[fp, #12 ]
+#endif
 
 #define I	r0
 #define J	r1
@@ -873,6 +882,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 	add	fp, sp, #24
 	sub	sp, sp, #STACKSIZE				// reserve stack
 
+#if !defined(__ARM_PCS_VFP)
+	vmov	OLD_ALPHA_R, OLD_ALPHAR_SOFTFP
+	vldr	OLD_ALPHA_I, OLD_ALPHAI_SOFTFP
+	ldr	OLD_A, OLD_A_SOFTFP
+#endif
 	str	OLD_M, M
 	str	OLD_N, N
 	str	OLD_K, K

kernel/arm/ctrmm_kernel_2x2_vfp.S

@@ -67,10 +67,20 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ALPHA_I	[fp, #-272]
 #define ALPHA_R	[fp, #-280]
 
+#if !defined(__ARM_PCS_VFP)
+#define OLD_ALPHAR_SOFTFP	r3
+#define OLD_ALPHAI_SOFTFP	[fp, #4]
+#define OLD_A_SOFTFP	[fp, #8 ]
+#define B	[fp, #12 ]
+#define C	[fp, #16 ]
+#define OLD_LDC	[fp, #20 ]
+#define OFFSET  [fp, #24 ]
+#else
 #define B	[fp, #4 ]
 #define C	[fp, #8 ]
 #define OLD_LDC	[fp, #12 ]
 #define OFFSET  [fp, #16 ]
+#endif
 
 #define I	r0
 #define J	r1
@@ -826,6 +836,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 	add	fp, sp, #24
 	sub	sp, sp, #STACKSIZE				// reserve stack
 
+#if !defined(__ARM_PCS_VFP)
+	vmov	OLD_ALPHA_R, OLD_ALPHAR_SOFTFP
+	vldr	OLD_ALPHA_I, OLD_ALPHAI_SOFTFP
+	ldr	OLD_A, OLD_A_SOFTFP
+#endif
 	str	OLD_M, M
 	str	OLD_N, N
 	str	OLD_K, K

kernel/arm/ctrmm_kernel_2x2_vfpv3.S

@@ -66,10 +66,20 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ALPHA_I	[fp, #-272]
 #define ALPHA_R	[fp, #-280]
 
+#if !defined(__ARM_PCS_VFP)
+#define OLD_ALPHAR_SOFTFP	r3
+#define OLD_ALPHAI_SOFTFP	[fp, #4]
+#define OLD_A_SOFTFP	[fp, #8 ]
+#define B	[fp, #12 ]
+#define C	[fp, #16 ]
+#define OLD_LDC	[fp, #20 ]
+#define OFFSET  [fp, #24 ]
+#else
 #define B	[fp, #4 ]
 #define C	[fp, #8 ]
 #define OLD_LDC	[fp, #12 ]
 #define OFFSET  [fp, #16 ]
+#endif
 
 #define I	r0
 #define J	r1
@@ -846,6 +856,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 	add	fp, sp, #24
 	sub	sp, sp, #STACKSIZE				// reserve stack
 
+#if !defined(__ARM_PCS_VFP)
+	vmov	OLD_ALPHA_R, OLD_ALPHAR_SOFTFP
+	vldr	OLD_ALPHA_I, OLD_ALPHAI_SOFTFP
+	ldr	OLD_A, OLD_A_SOFTFP
+#endif
 	str	OLD_M, M
 	str	OLD_N, N
 	str	OLD_K, K