Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / math-emu / stfs.c

diff --git a/kernel/arch/powerpc/math-emu/stfs.c b/kernel/arch/powerpc/math-emu/stfs.c
new file mode 100644 (file)
index 0000000..6122147
--- /dev/null
+++ b/kernel/arch/powerpc/math-emu/stfs.c
@@ -0,0 +1,42 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include <asm/sfp-machine.h>
+#include <math-emu/soft-fp.h>
+#include <math-emu/double.h>
+#include <math-emu/single.h>
+
+int
+stfs(void *frS, void *ea)
+{
+       FP_DECL_D(A);
+       FP_DECL_S(R);
+       FP_DECL_EX;
+       float f;
+
+#ifdef DEBUG
+       printk("%s: S %p, ea %p\n", __func__, frS, ea);
+#endif
+
+       FP_UNPACK_DP(A, frS);
+
+#ifdef DEBUG
+       printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
+#endif
+
+       FP_CONV(S, D, 1, 2, R, A);
+
+#ifdef DEBUG
+       printk("R: %ld %lu %ld (%ld)\n", R_s, R_f, R_e, R_c);
+#endif
+
+       _FP_PACK_CANONICAL(S, 1, R);
+       if (!FP_CUR_EXCEPTIONS || !__FPU_TRAP_P(FP_CUR_EXCEPTIONS)) {
+               _FP_PACK_RAW_1_P(S, &f, R);
+               if (copy_to_user(ea, &f, sizeof(float)))
+                       return -EFAULT;
+       }
+
+       return FP_CUR_EXCEPTIONS;
+}