fpopcode.h

linux 内核源代码

/* 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)

#ifdef CONFIG_FPE_NWFPE_XP
static inline floatx80 __pure getExtendedConstant(const unsigned int nIndex)
{
	extern const floatx80 floatx80Constant[];
	return floatx80Constant[nIndex];
}
#endif

static inline float64 __pure getDoubleConstant(const unsigned int nIndex)
{
	extern const float64 float64Constant[];
	return float64Constant[nIndex];
}

static inline float32 __pure getSingleConstant(const unsigned int nIndex)
{
	extern const float32 float32Constant[];
	return float32Constant[nIndex];
}

static inline unsigned int getTransferLength(const unsigned int opcode)
{
	unsigned int nRc;

	switch (opcode & MASK_TRANSFER_LENGTH) {
	case 0x00000000:
		nRc = 1;
		break;		/* single precision */
	case 0x00008000:
		nRc = 2;
		break;		/* double precision */
	case 0x00400000:
		nRc = 3;
		break;		/* extended precision */
	default:
		nRc = 0;
	}

	return (nRc);
}

static inline unsigned int getRegisterCount(const unsigned int opcode)
{
	unsigned int nRc;

	switch (opcode & MASK_REGISTER_COUNT) {
	case 0x00000000:
		nRc = 4;
		break;
	case 0x00008000:
		nRc = 1;
		break;
	case 0x00400000:
		nRc = 2;
		break;
	case 0x00408000:
		nRc = 3;
		break;
	default:
		nRc = 0;
	}

	return (nRc);
}

static inline unsigned int getRoundingPrecision(const unsigned int opcode)
{
	unsigned int nRc;

	switch (opcode & MASK_ROUNDING_PRECISION) {
	case 0x00000000:
		nRc = 1;
		break;
	case 0x00000080:
		nRc = 2;
		break;
	case 0x00080000:
		nRc = 3;
		break;
	default:
		nRc = 0;
	}

	return (nRc);
}

static inline unsigned int getDestinationSize(const unsigned int opcode)
{
	unsigned int nRc;

	switch (opcode & MASK_DESTINATION_SIZE) {
	case 0x00000000:
		nRc = typeSingle;
		break;
	case 0x00000080:
		nRc = typeDouble;
		break;
	case 0x00080000:
		nRc = typeExtended;
		break;
	default:
		nRc = typeNone;
	}

	return (nRc);
}

extern unsigned int checkCondition(const unsigned int opcode,
				   const unsigned int ccodes);

extern const float64 float64Constant[];
extern const float32 float32Constant[];

#endif