external/qemu 0.8.2

1 files changed, 390 insertions, 0 deletions

diff --git a/target-arm/nwfpe/fpopcode.h b/target-arm/nwfpe/fpopcode.h
new file mode 100644
index 0000000..13c7419
--- /dev/null
+++ b/target-arm/nwfpe/fpopcode.h
@@ -0,0 +1,390 @@
+/*
+    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.
+*/
+
+#ifndef __FPOPCODE_H__
+#define __FPOPCODE_H__
+
+/*
+ARM Floating Point Instruction Classes
+| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 
+|c o n d|1 1 0 P|U|u|W|L|   Rn  |v|  Fd |0|0|0|1|  o f f s e t  | CPDT
+|c o n d|1 1 0 P|U|w|W|L|   Rn  |x|  Fd |0|0|0|1|  o f f s e t  | CPDT
+| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 
+|c o n d|1 1 1 0|a|b|c|d|e|  Fn |j|  Fd |0|0|0|1|f|g|h|0|i|  Fm | CPDO
+|c o n d|1 1 1 0|a|b|c|L|e|  Fn |   Rd  |0|0|0|1|f|g|h|1|i|  Fm | CPRT
+|c o n d|1 1 1 0|a|b|c|1|e|  Fn |1|1|1|1|0|0|0|1|f|g|h|1|i|  Fm | comparisons
+| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 
+
+CPDT		data transfer instructions
+		LDF, STF, LFM, SFM
+		
+CPDO		dyadic arithmetic instructions
+		ADF, MUF, SUF, RSF, DVF, RDF,
+		POW, RPW, RMF, FML, FDV, FRD, POL
+
+CPDO		monadic arithmetic instructions
+		MVF, MNF, ABS, RND, SQT, LOG, LGN, EXP,
+		SIN, COS, TAN, ASN, ACS, ATN, URD, NRM
+		
+CPRT		joint arithmetic/data transfer instructions
+		FIX (arithmetic followed by load/store)
+		FLT (load/store followed by arithmetic)
+		CMF, CNF CMFE, CNFE (comparisons)
+		WFS, RFS (write/read floating point status register)
+		WFC, RFC (write/read floating point control register)
+
+cond		condition codes
+P		pre/post index bit: 0 = postindex, 1 = preindex
+U		up/down bit: 0 = stack grows down, 1 = stack grows up
+W		write back bit: 1 = update base register (Rn)
+L		load/store bit: 0 = store, 1 = load
+Rn		base register
+Rd		destination/source register		
+Fd		floating point destination register
+Fn		floating point source register
+Fm		floating point source register or floating point constant
+
+uv		transfer length (TABLE 1)
+wx		register count (TABLE 2)
+abcd		arithmetic opcode (TABLES 3 & 4)
+ef		destination size (rounding precision) (TABLE 5)
+gh		rounding mode (TABLE 6)
+j		dyadic/monadic bit: 0 = dyadic, 1 = monadic
+i 		constant bit: 1 = constant (TABLE 6)
+*/
+
+/*
+TABLE 1
++-------------------------+---+---+---------+---------+
+|  Precision              | u | v | FPSR.EP | length  |
++-------------------------+---+---+---------+---------+
+| Single                  | 0 ü 0 |    x    | 1 words |
+| Double                  | 1 ü 1 |    x    | 2 words |
+| Extended                | 1 ü 1 |    x    | 3 words |
+| Packed decimal          | 1 ü 1 |    0    | 3 words |
+| Expanded packed decimal | 1 ü 1 |    1    | 4 words |
++-------------------------+---+---+---------+---------+
+Note: x = don't care
+*/
+
+/*
+TABLE 2
++---+---+---------------------------------+
+| w | x | Number of registers to transfer |
++---+---+---------------------------------+
+| 0 ü 1 |  1                              |
+| 1 ü 0 |  2                              |
+| 1 ü 1 |  3                              |
+| 0 ü 0 |  4                              |
++---+---+---------------------------------+
+*/
+
+/*
+TABLE 3: Dyadic Floating Point Opcodes
++---+---+---+---+----------+-----------------------+-----------------------+
+| a | b | c | d | Mnemonic | Description           | Operation             |
++---+---+---+---+----------+-----------------------+-----------------------+
+| 0 | 0 | 0 | 0 | ADF      | Add                   | Fd := Fn + Fm         |
+| 0 | 0 | 0 | 1 | MUF      | Multiply              | Fd := Fn * Fm         |
+| 0 | 0 | 1 | 0 | SUF      | Subtract              | Fd := Fn - Fm         |
+| 0 | 0 | 1 | 1 | RSF      | Reverse subtract      | Fd := Fm - Fn         |
+| 0 | 1 | 0 | 0 | DVF      | Divide                | Fd := Fn / Fm         |
+| 0 | 1 | 0 | 1 | RDF      | Reverse divide        | Fd := Fm / Fn         |
+| 0 | 1 | 1 | 0 | POW      | Power                 | Fd := Fn ^ Fm         |
+| 0 | 1 | 1 | 1 | RPW      | Reverse power         | Fd := Fm ^ Fn         |
+| 1 | 0 | 0 | 0 | RMF      | Remainder             | Fd := IEEE rem(Fn/Fm) |
+| 1 | 0 | 0 | 1 | FML      | Fast Multiply         | Fd := Fn * Fm         |
+| 1 | 0 | 1 | 0 | FDV      | Fast Divide           | Fd := Fn / Fm         |
+| 1 | 0 | 1 | 1 | FRD      | Fast reverse divide   | Fd := Fm / Fn         |
+| 1 | 1 | 0 | 0 | POL      | Polar angle (ArcTan2) | Fd := arctan2(Fn,Fm)  |
+| 1 | 1 | 0 | 1 |          | undefined instruction | trap                  |
+| 1 | 1 | 1 | 0 |          | undefined instruction | trap                  |
+| 1 | 1 | 1 | 1 |          | undefined instruction | trap                  |
++---+---+---+---+----------+-----------------------+-----------------------+
+Note: POW, RPW, POL are deprecated, and are available for backwards
+      compatibility only.
+*/
+
+/*
+TABLE 4: Monadic Floating Point Opcodes
++---+---+---+---+----------+-----------------------+-----------------------+
+| a | b | c | d | Mnemonic | Description           | Operation             |
++---+---+---+---+----------+-----------------------+-----------------------+
+| 0 | 0 | 0 | 0 | MVF      | Move                  | Fd := Fm              |
+| 0 | 0 | 0 | 1 | MNF      | Move negated          | Fd := - Fm            |
+| 0 | 0 | 1 | 0 | ABS      | Absolute value        | Fd := abs(Fm)         |
+| 0 | 0 | 1 | 1 | RND      | Round to integer      | Fd := int(Fm)         |
+| 0 | 1 | 0 | 0 | SQT      | Square root           | Fd := sqrt(Fm)        |
+| 0 | 1 | 0 | 1 | LOG      | Log base 10           | Fd := log10(Fm)       |
+| 0 | 1 | 1 | 0 | LGN      | Log base e            | Fd := ln(Fm)          |
+| 0 | 1 | 1 | 1 | EXP      | Exponent              | Fd := e ^ Fm          |
+| 1 | 0 | 0 | 0 | SIN      | Sine                  | Fd := sin(Fm)         |
+| 1 | 0 | 0 | 1 | COS      | Cosine                | Fd := cos(Fm)         |
+| 1 | 0 | 1 | 0 | TAN      | Tangent               | Fd := tan(Fm)         |
+| 1 | 0 | 1 | 1 | ASN      | Arc Sine              | Fd := arcsin(Fm)      |
+| 1 | 1 | 0 | 0 | ACS      | Arc Cosine            | Fd := arccos(Fm)      |
+| 1 | 1 | 0 | 1 | ATN      | Arc Tangent           | Fd := arctan(Fm)      |
+| 1 | 1 | 1 | 0 | URD      | Unnormalized round    | Fd := int(Fm)         |
+| 1 | 1 | 1 | 1 | NRM      | Normalize             | Fd := norm(Fm)        |
++---+---+---+---+----------+-----------------------+-----------------------+
+Note: LOG, LGN, EXP, SIN, COS, TAN, ASN, ACS, ATN are deprecated, and are
+      available for backwards compatibility only.
+*/
+
+/*
+TABLE 5
++-------------------------+---+---+
+|  Rounding Precision     | e | f |
++-------------------------+---+---+
+| IEEE Single precision   | 0 ü 0 |
+| IEEE Double precision   | 0 ü 1 |
+| IEEE Extended precision | 1 ü 0 |
+| undefined (trap)        | 1 ü 1 |
++-------------------------+---+---+
+*/
+
+/*
+TABLE 5
++---------------------------------+---+---+
+|  Rounding Mode                  | g | h |
++---------------------------------+---+---+
+| Round to nearest (default)      | 0 ü 0 |
+| Round toward plus infinity      | 0 ü 1 |
+| Round toward negative infinity  | 1 ü 0 |
+| Round toward zero               | 1 ü 1 |
++---------------------------------+---+---+
+*/
+
+/*
+===
+=== Definitions for load and store instructions
+===
+*/
+
+/* bit masks */
+#define BIT_PREINDEX	0x01000000
+#define BIT_UP		0x00800000
+#define BIT_WRITE_BACK	0x00200000
+#define BIT_LOAD	0x00100000
+
+/* masks for load/store */
+#define MASK_CPDT		0x0c000000  /* data processing opcode */
+#define MASK_OFFSET		0x000000ff
+#define MASK_TRANSFER_LENGTH	0x00408000
+#define MASK_REGISTER_COUNT	MASK_TRANSFER_LENGTH
+#define MASK_COPROCESSOR	0x00000f00
+
+/* Tests for transfer length */
+#define TRANSFER_SINGLE		0x00000000
+#define TRANSFER_DOUBLE		0x00008000
+#define TRANSFER_EXTENDED	0x00400000
+#define TRANSFER_PACKED		MASK_TRANSFER_LENGTH
+
+/* Get the coprocessor number from the opcode. */
+#define getCoprocessorNumber(opcode)	((opcode & MASK_COPROCESSOR) >> 8)
+
+/* Get the offset from the opcode. */
+#define getOffset(opcode)		(opcode & MASK_OFFSET)
+
+/* Tests for specific data transfer load/store opcodes. */
+#define TEST_OPCODE(opcode,mask)	(((opcode) & (mask)) == (mask))
+
+#define LOAD_OP(opcode)   TEST_OPCODE((opcode),MASK_CPDT | BIT_LOAD)
+#define STORE_OP(opcode)  ((opcode & (MASK_CPDT | BIT_LOAD)) == MASK_CPDT)
+
+#define LDF_OP(opcode)	(LOAD_OP(opcode) && (getCoprocessorNumber(opcode) == 1))
+#define LFM_OP(opcode)	(LOAD_OP(opcode) && (getCoprocessorNumber(opcode) == 2))
+#define STF_OP(opcode)	(STORE_OP(opcode) && (getCoprocessorNumber(opcode) == 1))
+#define SFM_OP(opcode)	(STORE_OP(opcode) && (getCoprocessorNumber(opcode) == 2))
+
+#define PREINDEXED(opcode)		((opcode & BIT_PREINDEX) != 0)
+#define POSTINDEXED(opcode)		((opcode & BIT_PREINDEX) == 0)
+#define BIT_UP_SET(opcode)		((opcode & BIT_UP) != 0)
+#define BIT_UP_CLEAR(opcode)		((opcode & BIT_DOWN) == 0)
+#define WRITE_BACK(opcode)		((opcode & BIT_WRITE_BACK) != 0)
+#define LOAD(opcode)			((opcode & BIT_LOAD) != 0)
+#define STORE(opcode)			((opcode & BIT_LOAD) == 0)
+
+/*
+===
+=== Definitions for arithmetic instructions
+===
+*/
+/* bit masks */
+#define BIT_MONADIC	0x00008000
+#define BIT_CONSTANT	0x00000008
+
+#define CONSTANT_FM(opcode)		((opcode & BIT_CONSTANT) != 0)
+#define MONADIC_INSTRUCTION(opcode)	((opcode & BIT_MONADIC) != 0)
+
+/* instruction identification masks */
+#define MASK_CPDO		0x0e000000  /* arithmetic opcode */
+#define MASK_ARITHMETIC_OPCODE	0x00f08000
+#define MASK_DESTINATION_SIZE	0x00080080
+
+/* dyadic arithmetic opcodes. */
+#define ADF_CODE	0x00000000
+#define MUF_CODE	0x00100000
+#define SUF_CODE	0x00200000
+#define RSF_CODE	0x00300000
+#define DVF_CODE	0x00400000
+#define RDF_CODE	0x00500000
+#define POW_CODE	0x00600000
+#define RPW_CODE	0x00700000
+#define RMF_CODE	0x00800000
+#define FML_CODE	0x00900000
+#define FDV_CODE	0x00a00000
+#define FRD_CODE	0x00b00000
+#define POL_CODE	0x00c00000
+/* 0x00d00000 is an invalid dyadic arithmetic opcode */
+/* 0x00e00000 is an invalid dyadic arithmetic opcode */
+/* 0x00f00000 is an invalid dyadic arithmetic opcode */
+
+/* monadic arithmetic opcodes. */
+#define MVF_CODE	0x00008000
+#define MNF_CODE	0x00108000
+#define ABS_CODE	0x00208000
+#define RND_CODE	0x00308000
+#define SQT_CODE	0x00408000
+#define LOG_CODE	0x00508000
+#define LGN_CODE	0x00608000
+#define EXP_CODE	0x00708000
+#define SIN_CODE	0x00808000
+#define COS_CODE	0x00908000
+#define TAN_CODE	0x00a08000
+#define ASN_CODE	0x00b08000
+#define ACS_CODE	0x00c08000
+#define ATN_CODE	0x00d08000
+#define URD_CODE	0x00e08000
+#define NRM_CODE	0x00f08000
+
+/*
+===
+=== Definitions for register transfer and comparison instructions
+===
+*/
+
+#define MASK_CPRT		0x0e000010  /* register transfer opcode */
+#define MASK_CPRT_CODE		0x00f00000
+#define FLT_CODE		0x00000000
+#define FIX_CODE		0x00100000
+#define WFS_CODE		0x00200000
+#define RFS_CODE		0x00300000
+#define WFC_CODE		0x00400000
+#define RFC_CODE		0x00500000
+#define CMF_CODE		0x00900000
+#define CNF_CODE		0x00b00000
+#define CMFE_CODE		0x00d00000
+#define CNFE_CODE		0x00f00000
+
+/*
+===
+=== Common definitions
+===
+*/
+
+/* register masks */
+#define MASK_Rd		0x0000f000
+#define MASK_Rn		0x000f0000
+#define MASK_Fd		0x00007000
+#define MASK_Fm		0x00000007
+#define MASK_Fn		0x00070000
+
+/* condition code masks */
+#define CC_MASK		0xf0000000
+#define CC_NEGATIVE	0x80000000
+#define CC_ZERO		0x40000000
+#define CC_CARRY	0x20000000
+#define CC_OVERFLOW	0x10000000
+#define CC_EQ		0x00000000
+#define CC_NE		0x10000000
+#define CC_CS		0x20000000
+#define CC_HS		CC_CS
+#define CC_CC		0x30000000
+#define CC_LO		CC_CC
+#define CC_MI		0x40000000
+#define CC_PL		0x50000000
+#define CC_VS		0x60000000
+#define CC_VC		0x70000000
+#define CC_HI		0x80000000
+#define CC_LS		0x90000000
+#define CC_GE		0xa0000000
+#define CC_LT		0xb0000000
+#define CC_GT		0xc0000000
+#define CC_LE		0xd0000000
+#define CC_AL		0xe0000000
+#define CC_NV		0xf0000000
+
+/* rounding masks/values */
+#define MASK_ROUNDING_MODE	0x00000060
+#define ROUND_TO_NEAREST	0x00000000
+#define ROUND_TO_PLUS_INFINITY	0x00000020
+#define ROUND_TO_MINUS_INFINITY	0x00000040
+#define ROUND_TO_ZERO		0x00000060
+
+#define MASK_ROUNDING_PRECISION	0x00080080
+#define ROUND_SINGLE		0x00000000
+#define ROUND_DOUBLE		0x00000080
+#define ROUND_EXTENDED		0x00080000
+
+/* Get the condition code from the opcode. */
+#define getCondition(opcode)		(opcode >> 28)
+
+/* Get the source register from the opcode. */
+#define getRn(opcode)			((opcode & MASK_Rn) >> 16)
+
+/* Get the destination floating point register from the opcode. */
+#define getFd(opcode)			((opcode & MASK_Fd) >> 12)
+
+/* Get the first source floating point register from the opcode. */
+#define getFn(opcode)		((opcode & MASK_Fn) >> 16)
+
+/* Get the second source floating point register from the opcode. */
+#define getFm(opcode)		(opcode & MASK_Fm)
+
+/* Get the destination register from the opcode. */
+#define getRd(opcode)		((opcode & MASK_Rd) >> 12)
+
+/* Get the rounding mode from the opcode. */
+#define getRoundingMode(opcode)		((opcode & MASK_ROUNDING_MODE) >> 5)
+
+static inline const floatx80 getExtendedConstant(const unsigned int nIndex)
+{
+   extern const floatx80 floatx80Constant[];
+   return floatx80Constant[nIndex];
+} 
+
+static inline const float64 getDoubleConstant(const unsigned int nIndex)
+{
+   extern const float64 float64Constant[];
+   return float64Constant[nIndex];
+} 
+
+static inline const float32 getSingleConstant(const unsigned int nIndex)
+{
+   extern const float32 float32Constant[];
+   return float32Constant[nIndex];
+} 
+
+extern unsigned int getRegisterCount(const unsigned int opcode);
+extern unsigned int getDestinationSize(const unsigned int opcode);
+
+#endif