fixed_armv4.h File Reference

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Macros
#define	MULT16_32_Q16(a, b)   (MULT16_32_Q16_armv4(a, b))
#define	MULT16_32_Q15(a, b)   (MULT16_32_Q15_armv4(a, b))
#define	MAC16_32_Q15(c, a, b)   ADD32(c, MULT16_32_Q15(a, b))
#define	MAC16_32_Q16(c, a, b)   ADD32(c, MULT16_32_Q16(a, b))
#define	MULT32_32_Q31(a, b)   (opus_val32)((((opus_int64)(a)) * ((opus_int64)(b)))>>31)

Macro Definition Documentation

MAC16_32_Q15

#define MAC16_32_Q15	(		c,
			a,
			b
	)		ADD32(c, MULT16_32_Q15(a, b))

16x32 multiply, followed by a 15-bit shift right and 32-bit add. b must fit in 31 bits. Result fits in 32 bits.

MAC16_32_Q16

#define MAC16_32_Q16	(		c,
			a,
			b
	)		ADD32(c, MULT16_32_Q16(a, b))

16x32 multiply, followed by a 16-bit shift right and 32-bit add. Result fits in 32 bits.

MULT16_32_Q15

#define MULT16_32_Q15	(		a,
			b
	)		(MULT16_32_Q15_armv4(a, b))

MULT16_32_Q16

#define MULT16_32_Q16	(		a,
			b
	)		(MULT16_32_Q16_armv4(a, b))

MULT32_32_Q31

#define MULT32_32_Q31	(		a,
			b
	)		(opus_val32)((((opus_int64)(a)) * ((opus_int64)(b)))>>31)

32x32 multiplication, followed by a 31-bit shift right. Results fits in 32 bits