arm: add softfp support in kernel/arm/asum_vfp.S

kernel/arm/KERNEL.ARMV6

@@ -32,6 +32,11 @@ IDMAXKERNEL  = iamax_vfp.S
 ISMINKERNEL  = iamax_vfp.S
 IDMINKERNEL  = iamax_vfp.S
 
+SASUMKERNEL  = asum_vfp.S
+DASUMKERNEL  = asum_vfp.S
+CASUMKERNEL  = asum_vfp.S
+ZASUMKERNEL  = asum_vfp.S
+
 SGEMMKERNEL    = ../generic/gemmkernel_4x2.c
 ifneq ($(SGEMM_UNROLL_M), $(SGEMM_UNROLL_N))
 SGEMMINCOPY    = sgemm_ncopy_4_vfp.S
@@ -71,11 +76,6 @@ ZGEMMOTCOPYOBJ = zgemm_otcopy.o
 
 ifeq ($(ARM_ABI),hard)
 
-SASUMKERNEL  = asum_vfp.S
-DASUMKERNEL  = asum_vfp.S
-CASUMKERNEL  = asum_vfp.S
-ZASUMKERNEL  = asum_vfp.S
-
 SAXPYKERNEL  = axpy_vfp.S
 DAXPYKERNEL  = axpy_vfp.S
 CAXPYKERNEL  = axpy_vfp.S

kernel/arm/asum_vfp.S

@@ -475,6 +475,14 @@ asum_kernel_L999:
 	vadd.f32	s0 , s0, s1				// set return value
 #endif
 
+#if !defined(__ARM_PCS_VFP)
+#if !defined(DOUBLE)
+	vmov	r0, s0
+#else
+	vmov	r0, r1, d0
+#endif
+#endif
+
 	bx	lr
 
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