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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/sp_cmp.c
Initial import
Diffstat (limited to 'arch/mips/math-emu/sp_cmp.c')
-rw-r--r--arch/mips/math-emu/sp_cmp.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/mips/math-emu/sp_cmp.c b/arch/mips/math-emu/sp_cmp.c
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index 000000000..67b82f1e2
--- /dev/null
+++ b/arch/mips/math-emu/sp_cmp.c
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+/* IEEE754 floating point arithmetic
+ * single precision
+ */
+/*
+ * 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 "ieee754sp.h"
+
+int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cmp, int sig)
+{
+ int vx;
+ int vy;
+
+ COMPXSP;
+ COMPYSP;
+
+ EXPLODEXSP;
+ EXPLODEYSP;
+ FLUSHXSP;
+ FLUSHYSP;
+ ieee754_clearcx(); /* Even clear inexact flag here */
+
+ if (ieee754_class_nan(xc) || ieee754_class_nan(yc)) {
+ if (sig ||
+ xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN)
+ ieee754_setcx(IEEE754_INVALID_OPERATION);
+ return (cmp & IEEE754_CUN) != 0;
+ } else {
+ vx = x.bits;
+ vy = y.bits;
+
+ if (vx < 0)
+ vx = -vx ^ SP_SIGN_BIT;
+ if (vy < 0)
+ vy = -vy ^ SP_SIGN_BIT;
+
+ if (vx < vy)
+ return (cmp & IEEE754_CLT) != 0;
+ else if (vx == vy)
+ return (cmp & IEEE754_CEQ) != 0;
+ else
+ return (cmp & IEEE754_CGT) != 0;
+ }
+}