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/arm26/nwfpe/fpa11_cpdo.c b/arch/arm26/nwfpe/fpa11_cpdo.c
new file mode 100644
index 0000000..343a6b9
--- /dev/null
+++ b/arch/arm26/nwfpe/fpa11_cpdo.c
@@ -0,0 +1,117 @@
+/*
+ NetWinder Floating Point Emulator
+ (c) Rebel.COM, 1998,1999
+
+ Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "fpa11.h"
+#include "fpopcode.h"
+
+unsigned int SingleCPDO(const unsigned int opcode);
+unsigned int DoubleCPDO(const unsigned int opcode);
+unsigned int ExtendedCPDO(const unsigned int opcode);
+
+unsigned int EmulateCPDO(const unsigned int opcode)
+{
+ FPA11 *fpa11 = GET_FPA11();
+ unsigned int Fd, nType, nDest, nRc = 1;
+
+ //printk("EmulateCPDO(0x%08x)\n",opcode);
+
+ /* Get the destination size. If not valid let Linux perform
+ an invalid instruction trap. */
+ nDest = getDestinationSize(opcode);
+ if (typeNone == nDest) return 0;
+
+ SetRoundingMode(opcode);
+
+ /* Compare the size of the operands in Fn and Fm.
+ Choose the largest size and perform operations in that size,
+ in order to make use of all the precision of the operands.
+ If Fm is a constant, we just grab a constant of a size
+ matching the size of the operand in Fn. */
+ if (MONADIC_INSTRUCTION(opcode))
+ nType = nDest;
+ else
+ nType = fpa11->fType[getFn(opcode)];
+
+ if (!CONSTANT_FM(opcode))
+ {
+ register unsigned int Fm = getFm(opcode);
+ if (nType < fpa11->fType[Fm])
+ {
+ nType = fpa11->fType[Fm];
+ }
+ }
+
+ switch (nType)
+ {
+ case typeSingle : nRc = SingleCPDO(opcode); break;
+ case typeDouble : nRc = DoubleCPDO(opcode); break;
+ case typeExtended : nRc = ExtendedCPDO(opcode); break;
+ default : nRc = 0;
+ }
+
+ /* If the operation succeeded, check to see if the result in the
+ destination register is the correct size. If not force it
+ to be. */
+ Fd = getFd(opcode);
+ nType = fpa11->fType[Fd];
+ if ((0 != nRc) && (nDest != nType))
+ {
+ switch (nDest)
+ {
+ case typeSingle:
+ {
+ if (typeDouble == nType)
+ fpa11->fpreg[Fd].fSingle =
+ float64_to_float32(fpa11->fpreg[Fd].fDouble);
+ else
+ fpa11->fpreg[Fd].fSingle =
+ floatx80_to_float32(fpa11->fpreg[Fd].fExtended);
+ }
+ break;
+
+ case typeDouble:
+ {
+ if (typeSingle == nType)
+ fpa11->fpreg[Fd].fDouble =
+ float32_to_float64(fpa11->fpreg[Fd].fSingle);
+ else
+ fpa11->fpreg[Fd].fDouble =
+ floatx80_to_float64(fpa11->fpreg[Fd].fExtended);
+ }
+ break;
+
+ case typeExtended:
+ {
+ if (typeSingle == nType)
+ fpa11->fpreg[Fd].fExtended =
+ float32_to_floatx80(fpa11->fpreg[Fd].fSingle);
+ else
+ fpa11->fpreg[Fd].fExtended =
+ float64_to_floatx80(fpa11->fpreg[Fd].fDouble);
+ }
+ break;
+ }
+
+ fpa11->fType[Fd] = nDest;
+ }
+
+ return nRc;
+}