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Commit f80cc08d authored by Ralf Baechle's avatar Ralf Baechle
Browse files

MIPS: math-emu: Use __BITFIELD_FIELD to eleminate redundant definitions. 



Union _ieee754sp was even duplicated even though there are no endian
dependencies in it all.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 64a17a0f

arch/mips/math-emu/ieee754.h

+23 −63
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <asm/byteorder.h>

#include <linux/types.h>

#include <linux/sched.h>

#include <asm/bitfield.h>



/*

 * Not very pretty, but the Linux kernel's normal va_list definition
@@ -36,60 +37,31 @@ 
#include <stdarg.h>

#endif



#ifdef __LITTLE_ENDIAN

struct ieee754dp_konst {

	unsigned mantlo:32;

	unsigned manthi:20;

	unsigned bexp:11;

	unsigned sign:1;

};

struct ieee754sp_konst {

	unsigned mant:23;

	unsigned bexp:8;

	unsigned sign:1;

	__BITFIELD_FIELD(unsigned sign:1,

	__BITFIELD_FIELD(unsigned bexp:11,

	__BITFIELD_FIELD(unsigned manthi:20,

	__BITFIELD_FIELD(unsigned mantlo:32,

	;))))

};



typedef union _ieee754dp {

	struct ieee754dp_konst oparts;

	struct {

		u64 mant:52;

		unsigned int bexp:11;

		unsigned int sign:1;

	} parts;

	u64 bits;

	double d;

} ieee754dp;



typedef union _ieee754sp {

	struct ieee754sp_konst parts;

	float f;

	u32 bits;

} ieee754sp;

#endif



#ifdef __BIG_ENDIAN

struct ieee754dp_konst {

	unsigned sign:1;

	unsigned bexp:11;

	unsigned manthi:20;

	unsigned mantlo:32;

};



typedef union _ieee754dp {

	struct ieee754dp_konst oparts;

	struct {

		unsigned int sign:1;

		unsigned int bexp:11;

		u64 mant:52;

		__BITFIELD_FIELD(unsigned int sign:1,

		__BITFIELD_FIELD(unsigned int bexp:11,

		__BITFIELD_FIELD(u64 mant:52,

		;)))

	} parts;

	double d;

	u64 bits;

} ieee754dp;



struct ieee754sp_konst {

	unsigned sign:1;

	unsigned bexp:8;

	unsigned mant:23;

	__BITFIELD_FIELD(unsigned sign:1,

	__BITFIELD_FIELD(unsigned bexp:8,

	__BITFIELD_FIELD(unsigned mant:23,

	;)))

};



typedef union _ieee754sp {
@@ -97,7 +69,6 @@ typedef union _ieee754sp { 
	float f;

	u32 bits;

} ieee754sp;

#endif



/*

 * single precision (often aka float)
@@ -307,26 +278,15 @@ char *ieee754dp_tstr(ieee754dp x, int prec, int fmt, int af); 
 * The control status register

 */

struct _ieee754_csr {

#ifdef __BIG_ENDIAN

	unsigned pad0:7;

	unsigned nod:1;		/* set 1 for no denormalised numbers */

	unsigned c:1;		/* condition */

	unsigned pad1:5;

	unsigned cx:6;		/* exceptions this operation */

	unsigned mx:5;		/* exception enable  mask */

	unsigned sx:5;		/* exceptions total */

	unsigned rm:2;		/* current rounding mode */

#endif

#ifdef __LITTLE_ENDIAN

	unsigned rm:2;		/* current rounding mode */

	unsigned sx:5;		/* exceptions total */

	unsigned mx:5;		/* exception enable  mask */

	unsigned cx:6;		/* exceptions this operation */

	unsigned pad1:5;

	unsigned c:1;		/* condition */

	unsigned nod:1;		/* set 1 for no denormalised numbers */

	unsigned pad0:7;

#endif

	__BITFIELD_FIELD(unsigned pad0:7,

	__BITFIELD_FIELD(unsigned nod:1,	/* set 1 for no denormalised numbers */

	__BITFIELD_FIELD(unsigned c:1,		/* condition */

	__BITFIELD_FIELD(unsigned pad1:5,

	__BITFIELD_FIELD(unsigned cx:6,		/* exceptions this operation */

	__BITFIELD_FIELD(unsigned mx:5,		/* exception enable  mask */

	__BITFIELD_FIELD(unsigned sx:5,		/* exceptions total */

	__BITFIELD_FIELD(unsigned rm:2,		/* current rounding mode */

	;))))))))

};

#define ieee754_csr (*(struct _ieee754_csr *)(&current->thread.fpu.fcr31))