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!

1 files changed, 392 insertions, 0 deletions

diff --git a/arch/arm/nwfpe/fpa11_cpdt.c b/arch/arm/nwfpe/fpa11_cpdt.c
new file mode 100644
index 000000000000..95fb63fa9d18
--- /dev/null
+++ b/arch/arm/nwfpe/fpa11_cpdt.c
@@ -0,0 +1,392 @@
+/*
+    NetWinder Floating Point Emulator
+    (c) Rebel.com, 1998-1999
+    (c) Philip Blundell, 1998, 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 "softfloat.h"
+#include "fpopcode.h"
+#include "fpmodule.h"
+#include "fpmodule.inl"
+
+#include <asm/uaccess.h>
+
+static inline void loadSingle(const unsigned int Fn, const unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	fpa11->fType[Fn] = typeSingle;
+	get_user(fpa11->fpreg[Fn].fSingle, pMem);
+}
+
+static inline void loadDouble(const unsigned int Fn, const unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	unsigned int *p;
+	p = (unsigned int *) &fpa11->fpreg[Fn].fDouble;
+	fpa11->fType[Fn] = typeDouble;
+#ifdef __ARMEB__
+	get_user(p[0], &pMem[0]);	/* sign & exponent */
+	get_user(p[1], &pMem[1]);
+#else
+	get_user(p[0], &pMem[1]);
+	get_user(p[1], &pMem[0]);	/* sign & exponent */
+#endif
+}
+
+#ifdef CONFIG_FPE_NWFPE_XP
+static inline void loadExtended(const unsigned int Fn, const unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	unsigned int *p;
+	p = (unsigned int *) &fpa11->fpreg[Fn].fExtended;
+	fpa11->fType[Fn] = typeExtended;
+	get_user(p[0], &pMem[0]);	/* sign & exponent */
+	get_user(p[1], &pMem[2]);	/* ls bits */
+	get_user(p[2], &pMem[1]);	/* ms bits */
+}
+#endif
+
+static inline void loadMultiple(const unsigned int Fn, const unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	register unsigned int *p;
+	unsigned long x;
+
+	p = (unsigned int *) &(fpa11->fpreg[Fn]);
+	get_user(x, &pMem[0]);
+	fpa11->fType[Fn] = (x >> 14) & 0x00000003;
+
+	switch (fpa11->fType[Fn]) {
+	case typeSingle:
+	case typeDouble:
+		{
+			get_user(p[0], &pMem[2]);	/* Single */
+			get_user(p[1], &pMem[1]);	/* double msw */
+			p[2] = 0;			/* empty */
+		}
+		break;
+
+#ifdef CONFIG_FPE_NWFPE_XP
+	case typeExtended:
+		{
+			get_user(p[1], &pMem[2]);
+			get_user(p[2], &pMem[1]);	/* msw */
+			p[0] = (x & 0x80003fff);
+		}
+		break;
+#endif
+	}
+}
+
+static inline void storeSingle(const unsigned int Fn, unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	union {
+		float32 f;
+		unsigned int i[1];
+	} val;
+
+	switch (fpa11->fType[Fn]) {
+	case typeDouble:
+		val.f = float64_to_float32(fpa11->fpreg[Fn].fDouble);
+		break;
+
+#ifdef CONFIG_FPE_NWFPE_XP
+	case typeExtended:
+		val.f = floatx80_to_float32(fpa11->fpreg[Fn].fExtended);
+		break;
+#endif
+
+	default:
+		val.f = fpa11->fpreg[Fn].fSingle;
+	}
+
+	put_user(val.i[0], pMem);
+}
+
+static inline void storeDouble(const unsigned int Fn, unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	union {
+		float64 f;
+		unsigned int i[2];
+	} val;
+
+	switch (fpa11->fType[Fn]) {
+	case typeSingle:
+		val.f = float32_to_float64(fpa11->fpreg[Fn].fSingle);
+		break;
+
+#ifdef CONFIG_FPE_NWFPE_XP
+	case typeExtended:
+		val.f = floatx80_to_float64(fpa11->fpreg[Fn].fExtended);
+		break;
+#endif
+
+	default:
+		val.f = fpa11->fpreg[Fn].fDouble;
+	}
+
+#ifdef __ARMEB__
+	put_user(val.i[0], &pMem[0]);	/* msw */
+	put_user(val.i[1], &pMem[1]);	/* lsw */
+#else
+	put_user(val.i[1], &pMem[0]);	/* msw */
+	put_user(val.i[0], &pMem[1]);	/* lsw */
+#endif
+}
+
+#ifdef CONFIG_FPE_NWFPE_XP
+static inline void storeExtended(const unsigned int Fn, unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	union {
+		floatx80 f;
+		unsigned int i[3];
+	} val;
+
+	switch (fpa11->fType[Fn]) {
+	case typeSingle:
+		val.f = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
+		break;
+
+	case typeDouble:
+		val.f = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
+		break;
+
+	default:
+		val.f = fpa11->fpreg[Fn].fExtended;
+	}
+
+	put_user(val.i[0], &pMem[0]);	/* sign & exp */
+	put_user(val.i[1], &pMem[2]);
+	put_user(val.i[2], &pMem[1]);	/* msw */
+}
+#endif
+
+static inline void storeMultiple(const unsigned int Fn, unsigned int __user *pMem)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	register unsigned int nType, *p;
+
+	p = (unsigned int *) &(fpa11->fpreg[Fn]);
+	nType = fpa11->fType[Fn];
+
+	switch (nType) {
+	case typeSingle:
+	case typeDouble:
+		{
+			put_user(p[0], &pMem[2]);	/* single */
+			put_user(p[1], &pMem[1]);	/* double msw */
+			put_user(nType << 14, &pMem[0]);
+		}
+		break;
+
+#ifdef CONFIG_FPE_NWFPE_XP
+	case typeExtended:
+		{
+			put_user(p[2], &pMem[1]);	/* msw */
+			put_user(p[1], &pMem[2]);
+			put_user((p[0] & 0x80003fff) | (nType << 14), &pMem[0]);
+		}
+		break;
+#endif
+	}
+}
+
+unsigned int PerformLDF(const unsigned int opcode)
+{
+	unsigned int __user *pBase, *pAddress, *pFinal;
+	unsigned int nRc = 1, write_back = WRITE_BACK(opcode);
+
+	pBase = (unsigned int __user *) readRegister(getRn(opcode));
+	if (REG_PC == getRn(opcode)) {
+		pBase += 2;
+		write_back = 0;
+	}
+
+	pFinal = pBase;
+	if (BIT_UP_SET(opcode))
+		pFinal += getOffset(opcode);
+	else
+		pFinal -= getOffset(opcode);
+
+	if (PREINDEXED(opcode))
+		pAddress = pFinal;
+	else
+		pAddress = pBase;
+
+	switch (opcode & MASK_TRANSFER_LENGTH) {
+	case TRANSFER_SINGLE:
+		loadSingle(getFd(opcode), pAddress);
+		break;
+	case TRANSFER_DOUBLE:
+		loadDouble(getFd(opcode), pAddress);
+		break;
+#ifdef CONFIG_FPE_NWFPE_XP
+	case TRANSFER_EXTENDED:
+		loadExtended(getFd(opcode), pAddress);
+		break;
+#endif
+	default:
+		nRc = 0;
+	}
+
+	if (write_back)
+		writeRegister(getRn(opcode), (unsigned long) pFinal);
+	return nRc;
+}
+
+unsigned int PerformSTF(const unsigned int opcode)
+{
+	unsigned int __user *pBase, *pAddress, *pFinal;
+	unsigned int nRc = 1, write_back = WRITE_BACK(opcode);
+
+	SetRoundingMode(ROUND_TO_NEAREST);
+
+	pBase = (unsigned int __user *) readRegister(getRn(opcode));
+	if (REG_PC == getRn(opcode)) {
+		pBase += 2;
+		write_back = 0;
+	}
+
+	pFinal = pBase;
+	if (BIT_UP_SET(opcode))
+		pFinal += getOffset(opcode);
+	else
+		pFinal -= getOffset(opcode);
+
+	if (PREINDEXED(opcode))
+		pAddress = pFinal;
+	else
+		pAddress = pBase;
+
+	switch (opcode & MASK_TRANSFER_LENGTH) {
+	case TRANSFER_SINGLE:
+		storeSingle(getFd(opcode), pAddress);
+		break;
+	case TRANSFER_DOUBLE:
+		storeDouble(getFd(opcode), pAddress);
+		break;
+#ifdef CONFIG_FPE_NWFPE_XP
+	case TRANSFER_EXTENDED:
+		storeExtended(getFd(opcode), pAddress);
+		break;
+#endif
+	default:
+		nRc = 0;
+	}
+
+	if (write_back)
+		writeRegister(getRn(opcode), (unsigned long) pFinal);
+	return nRc;
+}
+
+unsigned int PerformLFM(const unsigned int opcode)
+{
+	unsigned int __user *pBase, *pAddress, *pFinal;
+	unsigned int i, Fd, write_back = WRITE_BACK(opcode);
+
+	pBase = (unsigned int __user *) readRegister(getRn(opcode));
+	if (REG_PC == getRn(opcode)) {
+		pBase += 2;
+		write_back = 0;
+	}
+
+	pFinal = pBase;
+	if (BIT_UP_SET(opcode))
+		pFinal += getOffset(opcode);
+	else
+		pFinal -= getOffset(opcode);
+
+	if (PREINDEXED(opcode))
+		pAddress = pFinal;
+	else
+		pAddress = pBase;
+
+	Fd = getFd(opcode);
+	for (i = getRegisterCount(opcode); i > 0; i--) {
+		loadMultiple(Fd, pAddress);
+		pAddress += 3;
+		Fd++;
+		if (Fd == 8)
+			Fd = 0;
+	}
+
+	if (write_back)
+		writeRegister(getRn(opcode), (unsigned long) pFinal);
+	return 1;
+}
+
+unsigned int PerformSFM(const unsigned int opcode)
+{
+	unsigned int __user *pBase, *pAddress, *pFinal;
+	unsigned int i, Fd, write_back = WRITE_BACK(opcode);
+
+	pBase = (unsigned int __user *) readRegister(getRn(opcode));
+	if (REG_PC == getRn(opcode)) {
+		pBase += 2;
+		write_back = 0;
+	}
+
+	pFinal = pBase;
+	if (BIT_UP_SET(opcode))
+		pFinal += getOffset(opcode);
+	else
+		pFinal -= getOffset(opcode);
+
+	if (PREINDEXED(opcode))
+		pAddress = pFinal;
+	else
+		pAddress = pBase;
+
+	Fd = getFd(opcode);
+	for (i = getRegisterCount(opcode); i > 0; i--) {
+		storeMultiple(Fd, pAddress);
+		pAddress += 3;
+		Fd++;
+		if (Fd == 8)
+			Fd = 0;
+	}
+
+	if (write_back)
+		writeRegister(getRn(opcode), (unsigned long) pFinal);
+	return 1;
+}
+
+unsigned int EmulateCPDT(const unsigned int opcode)
+{
+	unsigned int nRc = 0;
+
+	if (LDF_OP(opcode)) {
+		nRc = PerformLDF(opcode);
+	} else if (LFM_OP(opcode)) {
+		nRc = PerformLFM(opcode);
+	} else if (STF_OP(opcode)) {
+		nRc = PerformSTF(opcode);
+	} else if (SFM_OP(opcode)) {
+		nRc = PerformSFM(opcode);
+	} else {
+		nRc = 0;
+	}
+
+	return nRc;
+}