fixed_generic.h File Reference

Generic fixed-point operations. More...

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Defines
#define	QCONST16(x, bits)   ((spx_word16_t)(.5+(x)*(1<<(bits))))
#define	QCONST32(x, bits)   ((spx_word32_t)(.5+(x)*(1<<(bits))))
#define	NEG16(x)   (-(x))
#define	NEG32(x)   (-(x))
#define	EXTRACT16(x)   ((spx_word16_t)x)
#define	EXTEND32(x)   ((spx_word32_t)x)
#define	SHR16(a, shift)   ((a) >> (shift))
#define	SHL16(a, shift)   ((a) << (shift))
#define	SHR32(a, shift)   ((a) >> (shift))
#define	SHL32(a, shift)   ((a) << (shift))
#define	PSHR16(a, shift)   (SHR16((a)+(1<<((shift)-1)),shift))
#define	PSHR32(a, shift)   (SHR32((a)+(1<<((shift)-1)),shift))
#define	SATURATE16(x, a)   (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
#define	SATURATE32(x, a)   (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
#define	SHR(a, shift)   ((a) >> (shift))
#define	SHL(a, shift)   ((spx_word32_t)(a) << (shift))
#define	PSHR(a, shift)   (SHR((a)+(1<<((shift)-1)),shift))
#define	SATURATE(x, a)   (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
#define	ADD16(a, b)   ((spx_word16_t)((spx_word16_t)(a)+(spx_word16_t)(b)))
#define	SUB16(a, b)   ((spx_word16_t)(a)-(spx_word16_t)(b))
#define	ADD32(a, b)   ((spx_word32_t)(a)+(spx_word32_t)(b))
#define	SUB32(a, b)   ((spx_word32_t)(a)-(spx_word32_t)(b))
#define	ADD64(a, b)   ((spx_word64_t)(a)+(spx_word64_t)(b))
#define	MULT16_16_16(a, b)   ((((spx_word16_t)(a))*((spx_word16_t)(b))))
#define	MULT16_16(a, b)   (((spx_word32_t)(spx_word16_t)(a))*((spx_word32_t)(spx_word16_t)(b)))
#define	MAC16_16(c, a, b)   (ADD32((c),MULT16_16((a),(b))))
#define	MULT16_32_Q12(a, b)   ADD32(MULT16_16((a),SHR((b),12)), SHR(MULT16_16((a),((b)&0x00000fff)),12))
#define	MULT16_32_Q13(a, b)   ADD32(MULT16_16((a),SHR((b),13)), SHR(MULT16_16((a),((b)&0x00001fff)),13))
#define	MULT16_32_Q14(a, b)   ADD32(MULT16_16((a),SHR((b),14)), SHR(MULT16_16((a),((b)&0x00003fff)),14))
#define	MULT16_32_Q11(a, b)   ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11))
#define	MAC16_32_Q11(c, a, b)   ADD32(c,ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11)))
#define	MULT16_32_Q15(a, b)   ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15))
#define	MAC16_32_Q15(c, a, b)   ADD32(c,ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15)))
#define	MAC16_16_Q11(c, a, b)   (ADD32((c),SHR(MULT16_16((a),(b)),11)))
#define	MAC16_16_Q13(c, a, b)   (ADD32((c),SHR(MULT16_16((a),(b)),13)))
#define	MULT16_16_Q11_32(a, b)   (SHR(MULT16_16((a),(b)),11))
#define	MULT16_16_Q13(a, b)   (SHR(MULT16_16((a),(b)),13))
#define	MULT16_16_Q14(a, b)   (SHR(MULT16_16((a),(b)),14))
#define	MULT16_16_Q15(a, b)   (SHR(MULT16_16((a),(b)),15))
#define	MULT16_16_P13(a, b)   (SHR(ADD32(4096,MULT16_16((a),(b))),13))
#define	MULT16_16_P14(a, b)   (SHR(ADD32(8192,MULT16_16((a),(b))),14))
#define	MULT16_16_P15(a, b)   (SHR(ADD32(16384,MULT16_16((a),(b))),15))
#define	MUL_16_32_R15(a, bh, bl)   ADD32(MULT16_16((a),(bh)), SHR(MULT16_16((a),(bl)),15))
#define	DIV32_16(a, b)   ((spx_word16_t)(((spx_word32_t)(a))/((spx_word16_t)(b))))
#define	DIV32(a, b)   (((spx_word32_t)(a))/((spx_word32_t)(b)))

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Detailed Description

Generic fixed-point operations.

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Define Documentation

#define ADD16	(	a,
		b		)	((spx_word16_t)((spx_word16_t)(a)+(spx_word16_t)(b)))

#define ADD32	(	a,
		b		)	((spx_word32_t)(a)+(spx_word32_t)(b))

#define ADD64	(	a,
		b		)	((spx_word64_t)(a)+(spx_word64_t)(b))

#define DIV32	(	a,
		b		)	(((spx_word32_t)(a))/((spx_word32_t)(b)))

#define DIV32_16	(	a,
		b		)	((spx_word16_t)(((spx_word32_t)(a))/((spx_word16_t)(b))))

#define EXTEND32

(

x

)

((spx_word32_t)x)

#define EXTRACT16

(

x

)

((spx_word16_t)x)

#define MAC16_16	(	c,
		a,
		b		)	(ADD32((c),MULT16_16((a),(b))))

#define MAC16_16_Q11	(	c,
		a,
		b		)	(ADD32((c),SHR(MULT16_16((a),(b)),11)))

#define MAC16_16_Q13	(	c,
		a,
		b		)	(ADD32((c),SHR(MULT16_16((a),(b)),13)))

#define MAC16_32_Q11	(	c,
		a,
		b		)	ADD32(c,ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11)))

#define MAC16_32_Q15	(	c,
		a,
		b		)	ADD32(c,ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15)))

#define MUL_16_32_R15	(	a,
		bh,
		bl		)	ADD32(MULT16_16((a),(bh)), SHR(MULT16_16((a),(bl)),15))

#define MULT16_16	(	a,
		b		)	(((spx_word32_t)(spx_word16_t)(a))*((spx_word32_t)(spx_word16_t)(b)))

#define MULT16_16_16	(	a,
		b		)	((((spx_word16_t)(a))*((spx_word16_t)(b))))

#define MULT16_16_P13	(	a,
		b		)	(SHR(ADD32(4096,MULT16_16((a),(b))),13))

#define MULT16_16_P14	(	a,
		b		)	(SHR(ADD32(8192,MULT16_16((a),(b))),14))

#define MULT16_16_P15	(	a,
		b		)	(SHR(ADD32(16384,MULT16_16((a),(b))),15))

#define MULT16_16_Q11_32	(	a,
		b		)	(SHR(MULT16_16((a),(b)),11))

#define MULT16_16_Q13	(	a,
		b		)	(SHR(MULT16_16((a),(b)),13))

#define MULT16_16_Q14	(	a,
		b		)	(SHR(MULT16_16((a),(b)),14))

#define MULT16_16_Q15	(	a,
		b		)	(SHR(MULT16_16((a),(b)),15))

#define MULT16_32_Q11	(	a,
		b		)	ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11))

#define MULT16_32_Q12	(	a,
		b		)	ADD32(MULT16_16((a),SHR((b),12)), SHR(MULT16_16((a),((b)&0x00000fff)),12))

#define MULT16_32_Q13	(	a,
		b		)	ADD32(MULT16_16((a),SHR((b),13)), SHR(MULT16_16((a),((b)&0x00001fff)),13))

#define MULT16_32_Q14	(	a,
		b		)	ADD32(MULT16_16((a),SHR((b),14)), SHR(MULT16_16((a),((b)&0x00003fff)),14))

#define MULT16_32_Q15	(	a,
		b		)	ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15))

#define NEG16

(

x

)

(-(x))

#define NEG32

(

x

)

(-(x))

#define PSHR	(	a,
		shift		)	(SHR((a)+(1<<((shift)-1)),shift))

#define PSHR16	(	a,
		shift		)	(SHR16((a)+(1<<((shift)-1)),shift))

#define PSHR32	(	a,
		shift		)	(SHR32((a)+(1<<((shift)-1)),shift))

#define QCONST16	(	x,
		bits		)	((spx_word16_t)(.5+(x)*(1<<(bits))))

#define QCONST32	(	x,
		bits		)	((spx_word32_t)(.5+(x)*(1<<(bits))))

#define SATURATE	(	x,
		a		)	(((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))

#define SATURATE16	(	x,
		a		)	(((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))

#define SATURATE32	(	x,
		a		)	(((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))

#define SHL	(	a,
		shift		)	((spx_word32_t)(a) << (shift))

#define SHL16	(	a,
		shift		)	((a) << (shift))

#define SHL32	(	a,
		shift		)	((a) << (shift))

#define SHR	(	a,
		shift		)	((a) >> (shift))

#define SHR16	(	a,
		shift		)	((a) >> (shift))

#define SHR32	(	a,
		shift		)	((a) >> (shift))

#define SUB16	(	a,
		b		)	((spx_word16_t)(a)-(spx_word16_t)(b))

#define SUB32	(	a,
		b		)	((spx_word32_t)(a)-(spx_word32_t)(b))

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