1 files changed, 19 insertions, 0 deletions
diff --git a/core/riscv-rv32i/math.c b/core/riscv-rv32i/math.c
new file mode 100644
index 0000000000..591a67eb8f
--- /dev/null
+++ b/core/riscv-rv32i/math.c
@@ -0,0 +1,19 @@
+/* Copyright 2020 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+
+#ifdef CONFIG_FPU
+/* Single precision floating point square root. */
+float sqrtf(float x)
+{
+	asm volatile (
+		"fsqrt.s %0, %1"
+		: "=f" (x)
+		: "f" (x));
+
+	return x;
+}
+#endif