1 files changed, 83 insertions, 0 deletions

diff --git a/arch/mips/math-emu/ieee754.c b/arch/mips/math-emu/ieee754.c
new file mode 100644
index 000000000..0ba5dfbd4
--- /dev/null
+++ b/arch/mips/math-emu/ieee754.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* ieee754 floating point arithmetic
+ * single and double precision
+ *
+ * BUGS
+ * not much dp done
+ * doesn't generate IEEE754_INEXACT
+ */
+/*
+ * MIPS floating point support
+ * Copyright (C) 1994-2000 Algorithmics Ltd.
+ */
+
+#include <linux/compiler.h>
+
+#include "ieee754.h"
+#include "ieee754sp.h"
+#include "ieee754dp.h"
+
+/*
+ * Special constants
+ */
+
+/*
+ * Older GCC requires the inner braces for initialization of union ieee754dp's
+ * anonymous struct member.  Without an error will result.
+ */
+#define xPCNST(s, b, m, ebias)                                          \
+{                                                                       \
+        {                                                               \
+                .sign   = (s),                                          \
+                .bexp   = (b) + ebias,                                  \
+                .mant   = (m)                                           \
+        }                                                               \
+}
+
+#define DPCNST(s, b, m)                                                 \
+        xPCNST(s, b, m, DP_EBIAS)
+
+const union ieee754dp __ieee754dp_spcvals[] = {
+        DPCNST(0, DP_EMIN - 1, 0x0000000000000ULL),     /* + zero   */
+        DPCNST(1, DP_EMIN - 1, 0x0000000000000ULL),     /* - zero   */
+        DPCNST(0, 0,           0x0000000000000ULL),     /* + 1.0   */
+        DPCNST(1, 0,           0x0000000000000ULL),     /* - 1.0   */
+        DPCNST(0, 3,           0x4000000000000ULL),     /* + 10.0   */
+        DPCNST(1, 3,           0x4000000000000ULL),     /* - 10.0   */
+        DPCNST(0, DP_EMAX + 1, 0x0000000000000ULL),     /* + infinity */
+        DPCNST(1, DP_EMAX + 1, 0x0000000000000ULL),     /* - infinity */
+        DPCNST(0, DP_EMAX + 1, 0x7FFFFFFFFFFFFULL),     /* + ind legacy qNaN */
+        DPCNST(0, DP_EMAX + 1, 0x8000000000000ULL),     /* + indef 2008 qNaN */
+        DPCNST(0, DP_EMAX,     0xFFFFFFFFFFFFFULL),     /* + max */
+        DPCNST(1, DP_EMAX,     0xFFFFFFFFFFFFFULL),     /* - max */
+        DPCNST(0, DP_EMIN,     0x0000000000000ULL),     /* + min normal */
+        DPCNST(1, DP_EMIN,     0x0000000000000ULL),     /* - min normal */
+        DPCNST(0, DP_EMIN - 1, 0x0000000000001ULL),     /* + min denormal */
+        DPCNST(1, DP_EMIN - 1, 0x0000000000001ULL),     /* - min denormal */
+        DPCNST(0, 31,          0x0000000000000ULL),     /* + 1.0e31 */
+        DPCNST(0, 63,          0x0000000000000ULL),     /* + 1.0e63 */
+};
+
+#define SPCNST(s, b, m)                                                 \
+        xPCNST(s, b, m, SP_EBIAS)
+
+const union ieee754sp __ieee754sp_spcvals[] = {
+        SPCNST(0, SP_EMIN - 1, 0x000000),       /* + zero   */
+        SPCNST(1, SP_EMIN - 1, 0x000000),       /* - zero   */
+        SPCNST(0, 0,           0x000000),       /* + 1.0   */
+        SPCNST(1, 0,           0x000000),       /* - 1.0   */
+        SPCNST(0, 3,           0x200000),       /* + 10.0   */
+        SPCNST(1, 3,           0x200000),       /* - 10.0   */
+        SPCNST(0, SP_EMAX + 1, 0x000000),       /* + infinity */
+        SPCNST(1, SP_EMAX + 1, 0x000000),       /* - infinity */
+        SPCNST(0, SP_EMAX + 1, 0x3FFFFF),       /* + indef legacy quiet NaN */
+        SPCNST(0, SP_EMAX + 1, 0x400000),       /* + indef 2008 quiet NaN */
+        SPCNST(0, SP_EMAX,     0x7FFFFF),       /* + max normal */
+        SPCNST(1, SP_EMAX,     0x7FFFFF),       /* - max normal */
+        SPCNST(0, SP_EMIN,     0x000000),       /* + min normal */
+        SPCNST(1, SP_EMIN,     0x000000),       /* - min normal */
+        SPCNST(0, SP_EMIN - 1, 0x000001),       /* + min denormal */
+        SPCNST(1, SP_EMIN - 1, 0x000001),       /* - min denormal */
+        SPCNST(0, 31,          0x000000),       /* + 1.0e31 */
+        SPCNST(0, 63,          0x000000),       /* + 1.0e63 */
+};