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

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/mips/math-emu/dp_2008class.c b/arch/mips/math-emu/dp_2008class.c
new file mode 100644
index 000000000..81a0a63b1
--- /dev/null
+++ b/arch/mips/math-emu/dp_2008class.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IEEE754 floating point arithmetic
+ * double precision: CLASS.f
+ * FPR[fd] = class(FPR[fs])
+ *
+ * MIPS floating point support
+ * Copyright (C) 2015 Imagination Technologies, Ltd.
+ * Author: Markos Chandras <markos.chandras@imgtec.com>
+ */
+
+#include "ieee754dp.h"
+
+int ieee754dp_2008class(union ieee754dp x)
+{
+        COMPXDP;
+
+        EXPLODEXDP;
+
+        /*
+         * 10 bit mask as follows:
+         *
+         * bit0 = SNAN
+         * bit1 = QNAN
+         * bit2 = -INF
+         * bit3 = -NORM
+         * bit4 = -DNORM
+         * bit5 = -ZERO
+         * bit6 = INF
+         * bit7 = NORM
+         * bit8 = DNORM
+         * bit9 = ZERO
+         */
+
+        switch(xc) {
+        case IEEE754_CLASS_SNAN:
+                return 0x01;
+        case IEEE754_CLASS_QNAN:
+                return 0x02;
+        case IEEE754_CLASS_INF:
+                return 0x04 << (xs ? 0 : 4);
+        case IEEE754_CLASS_NORM:
+                return 0x08 << (xs ? 0 : 4);
+        case IEEE754_CLASS_DNORM:
+                return 0x10 << (xs ? 0 : 4);
+        case IEEE754_CLASS_ZERO:
+                return 0x20 << (xs ? 0 : 4);
+        default:
+                pr_err("Unknown class: %d\n", xc);
+                return 0;
+        }
+}