Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 132 insertions, 0 deletions

diff --git a/arch/arm/nwfpe/fpa11_cpdo.c b/arch/arm/nwfpe/fpa11_cpdo.c
new file mode 100644
index 000000000000..1bea67437b6f
--- /dev/null
+++ b/arch/arm/nwfpe/fpa11_cpdo.c
@@ -0,0 +1,132 @@
+/*
+    NetWinder Floating Point Emulator
+    (c) Rebel.COM, 1998,1999
+    (c) Philip Blundell, 2001
+
+    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 <linux/config.h>
+#include "fpa11.h"
+#include "fpopcode.h"
+
+unsigned int SingleCPDO(const unsigned int opcode, FPREG * rFd);
+unsigned int DoubleCPDO(const unsigned int opcode, FPREG * rFd);
+unsigned int ExtendedCPDO(const unsigned int opcode, FPREG * rFd);
+
+unsigned int EmulateCPDO(const unsigned int opcode)
+{
+        FPA11 *fpa11 = GET_FPA11();
+        FPREG *rFd;
+        unsigned int nType, nDest, nRc;
+
+        /* 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];
+                }
+        }
+
+        rFd = &fpa11->fpreg[getFd(opcode)];
+
+        switch (nType) {
+        case typeSingle:
+                nRc = SingleCPDO(opcode, rFd);
+                break;
+        case typeDouble:
+                nRc = DoubleCPDO(opcode, rFd);
+                break;
+#ifdef CONFIG_FPE_NWFPE_XP
+        case typeExtended:
+                nRc = ExtendedCPDO(opcode, rFd);
+                break;
+#endif
+        default:
+                nRc = 0;
+        }
+
+        /* The CPDO functions used to always set the destination type
+           to be the same as their working size. */
+
+        if (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. */
+
+                fpa11->fType[getFd(opcode)] = nDest;
+
+#ifdef CONFIG_FPE_NWFPE_XP
+                if (nDest != nType) {
+                        switch (nDest) {
+                        case typeSingle:
+                                {
+                                        if (typeDouble == nType)
+                                                rFd->fSingle = float64_to_float32(rFd->fDouble);
+                                        else
+                                                rFd->fSingle = floatx80_to_float32(rFd->fExtended);
+                                }
+                                break;
+
+                        case typeDouble:
+                                {
+                                        if (typeSingle == nType)
+                                                rFd->fDouble = float32_to_float64(rFd->fSingle);
+                                        else
+                                                rFd->fDouble = floatx80_to_float64(rFd->fExtended);
+                                }
+                                break;
+
+                        case typeExtended:
+                                {
+                                        if (typeSingle == nType)
+                                                rFd->fExtended = float32_to_floatx80(rFd->fSingle);
+                                        else
+                                                rFd->fExtended = float64_to_floatx80(rFd->fDouble);
+                                }
+                                break;
+                        }
+                }
+#else
+                if (nDest != nType) {
+                        if (nDest == typeSingle)
+                                rFd->fSingle = float64_to_float32(rFd->fDouble);
+                        else
+                                rFd->fDouble = float32_to_float64(rFd->fSingle);
+                }
+#endif
+        }
+
+        return nRc;
+}