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-rw-r--r--arch/mips/math-emu/dp_simple.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/mips/math-emu/dp_simple.c b/arch/mips/math-emu/dp_simple.c
new file mode 100644
index 000000000..b063aad7d
--- /dev/null
+++ b/arch/mips/math-emu/dp_simple.c
@@ -0,0 +1,49 @@
+// 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_neg(union ieee754dp x)
+{
+ union ieee754dp y;
+
+ if (ieee754_csr.abs2008) {
+ y = x;
+ DPSIGN(y) = !DPSIGN(x);
+ } else {
+ unsigned int oldrm;
+
+ oldrm = ieee754_csr.rm;
+ ieee754_csr.rm = FPU_CSR_RD;
+ y = ieee754dp_sub(ieee754dp_zero(0), x);
+ ieee754_csr.rm = oldrm;
+ }
+ return y;
+}
+
+union ieee754dp ieee754dp_abs(union ieee754dp x)
+{
+ union ieee754dp y;
+
+ if (ieee754_csr.abs2008) {
+ y = x;
+ DPSIGN(y) = 0;
+ } else {
+ unsigned int oldrm;
+
+ oldrm = ieee754_csr.rm;
+ ieee754_csr.rm = FPU_CSR_RD;
+ if (DPSIGN(x))
+ y = ieee754dp_sub(ieee754dp_zero(0), x);
+ else
+ y = ieee754dp_add(ieee754dp_zero(0), x);
+ ieee754_csr.rm = oldrm;
+ }
+ return y;
+}