1 files changed, 77 insertions, 0 deletions

diff --git a/arch/mips/math-emu/ieee754sp.h b/arch/mips/math-emu/ieee754sp.h
new file mode 100644
index 000000000..79040f890
--- /dev/null
+++ b/arch/mips/math-emu/ieee754sp.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * IEEE754 floating point
+ * double precision internal header file
+ */
+/*
+ * MIPS floating point support
+ * Copyright (C) 1994-2000 Algorithmics Ltd.
+ */
+
+#include <linux/compiler.h>
+
+#include "ieee754int.h"
+
+#define assert(expr) ((void)0)
+
+#define SP_EBIAS        127
+#define SP_EMIN         (-126)
+#define SP_EMAX         127
+#define SP_FBITS        23
+#define SP_MBITS        23
+
+#define SP_MBIT(x)      ((u32)1 << (x))
+#define SP_HIDDEN_BIT   SP_MBIT(SP_FBITS)
+#define SP_SIGN_BIT     SP_MBIT(31)
+
+#define SPSIGN(sp)      (sp.sign)
+#define SPBEXP(sp)      (sp.bexp)
+#define SPMANT(sp)      (sp.mant)
+
+static inline int ieee754sp_finite(union ieee754sp x)
+{
+        return SPBEXP(x) != SP_EMAX + 1 + SP_EBIAS;
+}
+
+/* 64 bit right shift with rounding */
+#define XSPSRS64(v, rs)                                         \
+        (((rs) >= 64) ? ((v) != 0) : ((v) >> (rs)) | ((v) << (64-(rs)) != 0))
+
+/* 3bit extended single precision sticky right shift */
+#define XSPSRS(v, rs)                                           \
+        ((rs > (SP_FBITS+3))?1:((v) >> (rs)) | ((v) << (32-(rs)) != 0))
+
+#define XSPSRS1(m) \
+        ((m >> 1) | (m & 1))
+
+#define SPXSRSX1() \
+        (xe++, (xm = XSPSRS1(xm)))
+
+#define SPXSRSY1() \
+        (ye++, (ym = XSPSRS1(ym)))
+
+/* convert denormal to normalized with extended exponent */
+#define SPDNORMx(m,e) \
+        while ((m >> SP_FBITS) == 0) { m <<= 1; e--; }
+#define SPDNORMX        SPDNORMx(xm, xe)
+#define SPDNORMY        SPDNORMx(ym, ye)
+#define SPDNORMZ        SPDNORMx(zm, ze)
+
+static inline union ieee754sp buildsp(int s, int bx, unsigned int m)
+{
+        union ieee754sp r;
+
+        assert((s) == 0 || (s) == 1);
+        assert((bx) >= SP_EMIN - 1 + SP_EBIAS
+               && (bx) <= SP_EMAX + 1 + SP_EBIAS);
+        assert(((m) >> SP_FBITS) == 0);
+
+        r.sign = s;
+        r.bexp = bx;
+        r.mant = m;
+
+        return r;
+}
+
+extern union ieee754sp __cold ieee754sp_nanxcpt(union ieee754sp);
+extern union ieee754sp ieee754sp_format(int, int, unsigned);