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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/mips/math-emu/ieee754.c
Initial import
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diff --git a/arch/mips/math-emu/ieee754.c b/arch/mips/math-emu/ieee754.c
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+/* 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.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#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), /* + indef quiet Nan */
+ 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 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 */
+};