Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 53 insertions, 0 deletions

diff --git a/arch/mips/math-emu/sp_fint.c b/arch/mips/math-emu/sp_fint.c
new file mode 100644
index 000000000..6068e3caa
--- /dev/null
+++ b/arch/mips/math-emu/sp_fint.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* IEEE754 floating point arithmetic
+ * single precision
+ */
+/*
+ * MIPS floating point support
+ * Copyright (C) 1994-2000 Algorithmics Ltd.
+ */
+
+#include "ieee754sp.h"
+
+union ieee754sp ieee754sp_fint(int x)
+{
+        unsigned int xm;
+        int xe;
+        int xs;
+
+        ieee754_clearcx();
+
+        if (x == 0)
+                return ieee754sp_zero(0);
+        if (x == 1 || x == -1)
+                return ieee754sp_one(x < 0);
+        if (x == 10 || x == -10)
+                return ieee754sp_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;
+        }
+        xe = SP_FBITS + 3;
+
+        if (xm >> (SP_FBITS + 1 + 3)) {
+                /* shunt out overflow bits
+                 */
+                while (xm >> (SP_FBITS + 1 + 3)) {
+                        SPXSRSX1();
+                }
+        } else {
+                /* normalize in grs extended single precision
+                 */
+                while ((xm >> (SP_FBITS + 3)) == 0) {
+                        xm <<= 1;
+                        xe--;
+                }
+        }
+        return ieee754sp_format(xs, xe, xm);
+}