1 files changed, 44 insertions, 0 deletions

diff --git a/arch/mips/math-emu/dp_fint.c b/arch/mips/math-emu/dp_fint.c
new file mode 100644
index 000000000..996b15ba0
--- /dev/null
+++ b/arch/mips/math-emu/dp_fint.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* IEEE754 floating point arithmetic
+ * double precision: common utilities
+ */
+/*
+ * MIPS floating point support
+ * Copyright (C) 1994-2000 Algorithmics Ltd.
+ */
+
+#include "ieee754dp.h"
+
+union ieee754dp ieee754dp_fint(int x)
+{
+        u64 xm;
+        int xe;
+        int xs;
+
+        ieee754_clearcx();
+
+        if (x == 0)
+                return ieee754dp_zero(0);
+        if (x == 1 || x == -1)
+                return ieee754dp_one(x < 0);
+        if (x == 10 || x == -10)
+                return ieee754dp_ten(x < 0);
+
+        xs = (x < 0);
+        if (xs) {
+                if (x == (1 << 31))
+                        xm = ((unsigned) 1 << 31);      /* max neg can't be safely negated */
+                else
+                        xm = -x;
+        } else {
+                xm = x;
+        }
+
+        /* normalize - result can never be inexact or overflow */
+        xe = DP_FBITS;
+        while ((xm >> DP_FBITS) == 0) {
+                xm <<= 1;
+                xe--;
+        }
+        return builddp(xs, xe + DP_EBIAS, xm & ~DP_HIDDEN_BIT);
+}