Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/mips/math-emu/sp_tlong.c b/arch/mips/math-emu/sp_tlong.c
new file mode 100644
index 0000000..4be21aa
--- /dev/null
+++ b/arch/mips/math-emu/sp_tlong.c
@@ -0,0 +1,123 @@
+/* IEEE754 floating point arithmetic
+ * single precision
+ */
+/*
+ * MIPS floating point support
+ * Copyright (C) 1994-2000 Algorithmics Ltd.
+ * http://www.algor.co.uk
+ *
+ * ########################################################################
+ *
+ * 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.,
+ * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * ########################################################################
+ */
+
+
+#include "ieee754sp.h"
+
+s64 ieee754sp_tlong(ieee754sp x)
+{
+ COMPXDP; /* <-- need 64-bit mantissa tmp */
+
+ CLEARCX;
+
+ EXPLODEXSP;
+ FLUSHXSP;
+
+ switch (xc) {
+ case IEEE754_CLASS_SNAN:
+ case IEEE754_CLASS_QNAN:
+ case IEEE754_CLASS_INF:
+ SETCX(IEEE754_INVALID_OPERATION);
+ return ieee754di_xcpt(ieee754di_indef(), "sp_tlong", x);
+ case IEEE754_CLASS_ZERO:
+ return 0;
+ case IEEE754_CLASS_DNORM:
+ case IEEE754_CLASS_NORM:
+ break;
+ }
+ if (xe >= 63) {
+ /* look for valid corner case */
+ if (xe == 63 && xs && xm == SP_HIDDEN_BIT)
+ return -0x8000000000000000LL;
+ /* Set invalid. We will only use overflow for floating
+ point overflow */
+ SETCX(IEEE754_INVALID_OPERATION);
+ return ieee754di_xcpt(ieee754di_indef(), "sp_tlong", x);
+ }
+ /* oh gawd */
+ if (xe > SP_MBITS) {
+ xm <<= xe - SP_MBITS;
+ } else if (xe < SP_MBITS) {
+ u32 residue;
+ int round;
+ int sticky;
+ int odd;
+
+ if (xe < -1) {
+ residue = xm;
+ round = 0;
+ sticky = residue != 0;
+ xm = 0;
+ }
+ else {
+ residue = xm << (32 - SP_MBITS + xe);
+ round = (residue >> 31) != 0;
+ sticky = (residue << 1) != 0;
+ xm >>= SP_MBITS - xe;
+ }
+ odd = (xm & 0x1) != 0x0;
+ switch (ieee754_csr.rm) {
+ case IEEE754_RN:
+ if (round && (sticky || odd))
+ xm++;
+ break;
+ case IEEE754_RZ:
+ break;
+ case IEEE754_RU: /* toward +Infinity */
+ if ((round || sticky) && !xs)
+ xm++;
+ break;
+ case IEEE754_RD: /* toward -Infinity */
+ if ((round || sticky) && xs)
+ xm++;
+ break;
+ }
+ if ((xm >> 63) != 0) {
+ /* This can happen after rounding */
+ SETCX(IEEE754_INVALID_OPERATION);
+ return ieee754di_xcpt(ieee754di_indef(), "sp_tlong", x);
+ }
+ if (round || sticky)
+ SETCX(IEEE754_INEXACT);
+ }
+ if (xs)
+ return -xm;
+ else
+ return xm;
+}
+
+
+u64 ieee754sp_tulong(ieee754sp x)
+{
+ ieee754sp hb = ieee754sp_1e63();
+
+ /* what if x < 0 ?? */
+ if (ieee754sp_lt(x, hb))
+ return (u64) ieee754sp_tlong(x);
+
+ return (u64) ieee754sp_tlong(ieee754sp_sub(x, hb)) |
+ (1ULL << 63);
+}