1 files changed, 43 insertions, 0 deletions
diff --git a/arch/powerpc/math-emu/stfs.c b/arch/powerpc/math-emu/stfs.c
new file mode 100644
index 000000000..ddf9bbdb5
--- /dev/null
+++ b/arch/powerpc/math-emu/stfs.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/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;
+}