/src/opus/silk/Inlines.h

Source
/***********************************************************************
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***********************************************************************/

/*! \file silk_Inlines.h
 *  \brief silk_Inlines.h defines OPUS_INLINE signal processing functions.
 */

#ifndef SILK_FIX_INLINES_H
#define SILK_FIX_INLINES_H


/* count leading zeros of opus_int64 */
static OPUS_INLINE opus_int32 silk_CLZ64( opus_int64 in )
{
    opus_int32 in_upper;

    in_upper = (opus_int32)silk_RSHIFT64(in, 32);
    if (in_upper == 0) {
        /* Search in the lower 32 bits */
        return 32 + silk_CLZ32( (opus_int32) in );
    } else {
        /* Search in the upper 32 bits */
        return silk_CLZ32( in_upper );
    }
}

/* get number of leading zeros and fractional part (the bits right after the leading one */
static OPUS_INLINE void silk_CLZ_FRAC(
    opus_int32 in,            /* I  input                               */
    opus_int32 *lz,           /* O  number of leading zeros             */
    opus_int32 *frac_Q7       /* O  the 7 bits right after the leading one */
)
{
    opus_int32 lzeros = silk_CLZ32(in);

    * lz = lzeros;
    * frac_Q7 = silk_ROR32(in, 24 - lzeros) & 0x7f;
}

/* Approximation of square root                                          */
/* Accuracy: < +/- 10%  for output values > 15                           */
/*           < +/- 2.5% for output values > 120                          */
static OPUS_INLINE opus_int32 silk_SQRT_APPROX( opus_int32 x )
{
    opus_int32 y, lz, frac_Q7;

    if( x <= 0 ) {
        return 0;
    }

    silk_CLZ_FRAC(x, &lz, &frac_Q7);

    if( lz & 1 ) {
        y = 32768;
    } else {
        y = 46214;        /* 46214 = sqrt(2) * 32768 */
    }

    /* get scaling right */
    y >>= silk_RSHIFT(lz, 1);

    /* increment using fractional part of input */
    y = silk_SMLAWB(y, y, silk_SMULBB(213, frac_Q7));

    return y;
}

/* Divide two int32 values and return result as int32 in a given Q-domain */
static OPUS_INLINE opus_int32 silk_DIV32_varQ(   /* O    returns a good approximation of "(a32 << Qres) / b32" */
    const opus_int32     a32,               /* I    numerator (Q0)                  */
    const opus_int32     b32,               /* I    denominator (Q0)                */
    const opus_int       Qres               /* I    Q-domain of result (>= 0)       */
)
{
    opus_int   a_headrm, b_headrm, lshift;
    opus_int32 b32_inv, a32_nrm, b32_nrm, result;

    silk_assert( b32 != 0 );
    silk_assert( Qres >= 0 );

    /* Compute number of bits head room and normalize inputs */
    a_headrm = silk_CLZ32( silk_abs(a32) ) - 1;
    a32_nrm = silk_LSHIFT(a32, a_headrm);                                       /* Q: a_headrm                  */
    b_headrm = silk_CLZ32( silk_abs(b32) ) - 1;
    b32_nrm = silk_LSHIFT(b32, b_headrm);                                       /* Q: b_headrm                  */

    /* Inverse of b32, with 14 bits of precision */
    b32_inv = silk_DIV32_16( silk_int32_MAX >> 2, silk_RSHIFT(b32_nrm, 16) );   /* Q: 29 + 16 - b_headrm        */

    /* First approximation */
    result = silk_SMULWB(a32_nrm, b32_inv);                                     /* Q: 29 + a_headrm - b_headrm  */

    /* Compute residual by subtracting product of denominator and first approximation */
    /* It's OK to overflow because the final value of a32_nrm should always be small */
    a32_nrm = silk_SUB32_ovflw(a32_nrm, silk_LSHIFT_ovflw( silk_SMMUL(b32_nrm, result), 3 ));  /* Q: a_headrm   */

    /* Refinement */
    result = silk_SMLAWB(result, a32_nrm, b32_inv);                             /* Q: 29 + a_headrm - b_headrm  */

    /* Convert to Qres domain */
    lshift = 29 + a_headrm - b_headrm - Qres;
    if( lshift < 0 ) {
        return silk_LSHIFT_SAT32(result, -lshift);
    } else {
        if( lshift < 32){
            return silk_RSHIFT(result, lshift);
        } else {
            /* Avoid undefined result */
            return 0;
        }
    }
}

/* Invert int32 value and return result as int32 in a given Q-domain */
static OPUS_INLINE opus_int32 silk_INVERSE32_varQ(   /* O    returns a good approximation of "(1 << Qres) / b32" */
    const opus_int32     b32,                   /* I    denominator (Q0)                */
    const opus_int       Qres                   /* I    Q-domain of result (> 0)        */
)
{
    opus_int   b_headrm, lshift;
    opus_int32 b32_inv, b32_nrm, err_Q32, result;

    silk_assert( b32 != 0 );
    silk_assert( Qres > 0 );

    /* Compute number of bits head room and normalize input */
    b_headrm = silk_CLZ32( silk_abs(b32) ) - 1;
    b32_nrm = silk_LSHIFT(b32, b_headrm);                                       /* Q: b_headrm                */

    /* Inverse of b32, with 14 bits of precision */
    b32_inv = silk_DIV32_16( silk_int32_MAX >> 2, silk_RSHIFT(b32_nrm, 16) );   /* Q: 29 + 16 - b_headrm    */

    /* First approximation */
    result = silk_LSHIFT(b32_inv, 16);                                          /* Q: 61 - b_headrm            */

    /* Compute residual by subtracting product of denominator and first approximation from one */
    err_Q32 = silk_LSHIFT( ((opus_int32)1<<29) - silk_SMULWB(b32_nrm, b32_inv), 3 );        /* Q32                        */

    /* Refinement */
    result = silk_SMLAWW(result, err_Q32, b32_inv);                             /* Q: 61 - b_headrm            */

    /* Convert to Qres domain */
    lshift = 61 - b_headrm - Qres;
    if( lshift <= 0 ) {
        return silk_LSHIFT_SAT32(result, -lshift);
    } else {
        if( lshift < 32){
            return silk_RSHIFT(result, lshift);
        }else{
            /* Avoid undefined result */
            return 0;
        }
    }
}

#endif /* SILK_FIX_INLINES_H */

Line	Count	Source
1		/***********************************************************************
2		Copyright (c) 2006-2011, Skype Limited. All rights reserved.
3		Redistribution and use in source and binary forms, with or without
4		modification, are permitted provided that the following conditions
5		are met:
6		- Redistributions of source code must retain the above copyright notice,
7		this list of conditions and the following disclaimer.
8		- Redistributions in binary form must reproduce the above copyright
9		notice, this list of conditions and the following disclaimer in the
10		documentation and/or other materials provided with the distribution.
11		- Neither the name of Internet Society, IETF or IETF Trust, nor the
12		names of specific contributors, may be used to endorse or promote
13		products derived from this software without specific prior written
14		permission.
15		THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16		AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17		IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18		ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19		LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20		CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21		SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22		INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23		CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24		ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25		POSSIBILITY OF SUCH DAMAGE.
26		***********************************************************************/
27
28		/*! \file silk_Inlines.h
29		* \brief silk_Inlines.h defines OPUS_INLINE signal processing functions.
30		*/
31
32		#ifndef SILK_FIX_INLINES_H
33		#define SILK_FIX_INLINES_H
34
35
36		/* count leading zeros of opus_int64 */
37		static OPUS_INLINE opus_int32 silk_CLZ64( opus_int64 in )
38	0	{
39	0	opus_int32 in_upper;
40	0
41	0	in_upper = (opus_int32)silk_RSHIFT64(in, 32);
42	0	if (in_upper == 0) {
43	0	/* Search in the lower 32 bits */
44	0	return 32 + silk_CLZ32( (opus_int32) in );
45	0	} else {
46	0	/* Search in the upper 32 bits */
47	0	return silk_CLZ32( in_upper );
48	0	}
49	0	} Unexecuted instantiation: opus_decoder.c:silk_CLZ64 Unexecuted instantiation: vq.c:silk_CLZ64 Unexecuted instantiation: x86cpu.c:silk_CLZ64 Unexecuted instantiation: dec_API.c:silk_CLZ64 Unexecuted instantiation: tables_other.c:silk_CLZ64 Unexecuted instantiation: stereo_MS_to_LR.c:silk_CLZ64 Unexecuted instantiation: resampler.c:silk_CLZ64 Unexecuted instantiation: resampler_private_down_FIR.c:silk_CLZ64 Unexecuted instantiation: resampler_private_IIR_FIR.c:silk_CLZ64 Unexecuted instantiation: resampler_private_up2_HQ.c:silk_CLZ64 Unexecuted instantiation: resampler_rom.c:silk_CLZ64 Unexecuted instantiation: stereo_decode_pred.c:silk_CLZ64 Unexecuted instantiation: init_decoder.c:silk_CLZ64 Unexecuted instantiation: decode_frame.c:silk_CLZ64 Unexecuted instantiation: decode_parameters.c:silk_CLZ64 Unexecuted instantiation: decode_indices.c:silk_CLZ64 Unexecuted instantiation: decode_pulses.c:silk_CLZ64 Unexecuted instantiation: decoder_set_fs.c:silk_CLZ64 Unexecuted instantiation: gain_quant.c:silk_CLZ64 Unexecuted instantiation: NLSF_decode.c:silk_CLZ64 Unexecuted instantiation: PLC.c:silk_CLZ64 Unexecuted instantiation: shell_coder.c:silk_CLZ64 Unexecuted instantiation: tables_gain.c:silk_CLZ64 Unexecuted instantiation: tables_LTP.c:silk_CLZ64 Unexecuted instantiation: tables_NLSF_CB_NB_MB.c:silk_CLZ64 Unexecuted instantiation: tables_NLSF_CB_WB.c:silk_CLZ64 Unexecuted instantiation: tables_pitch_lag.c:silk_CLZ64 Unexecuted instantiation: tables_pulses_per_block.c:silk_CLZ64 Unexecuted instantiation: NLSF_unpack.c:silk_CLZ64 Unexecuted instantiation: bwexpander.c:silk_CLZ64 Unexecuted instantiation: decode_pitch.c:silk_CLZ64 Unexecuted instantiation: lin2log.c:silk_CLZ64 Unexecuted instantiation: log2lin.c:silk_CLZ64 Unexecuted instantiation: LPC_analysis_filter.c:silk_CLZ64 Unexecuted instantiation: LPC_inv_pred_gain.c:silk_CLZ64 Unexecuted instantiation: NLSF2A.c:silk_CLZ64 Unexecuted instantiation: NLSF_stabilize.c:silk_CLZ64 Unexecuted instantiation: pitch_est_tables.c:silk_CLZ64 Unexecuted instantiation: resampler_private_AR2.c:silk_CLZ64 Unexecuted instantiation: sort.c:silk_CLZ64 Unexecuted instantiation: sum_sqr_shift.c:silk_CLZ64 Unexecuted instantiation: LPC_fit.c:silk_CLZ64 Unexecuted instantiation: CNG.c:silk_CLZ64 Unexecuted instantiation: code_signs.c:silk_CLZ64 Unexecuted instantiation: decode_core.c:silk_CLZ64 Unexecuted instantiation: bwexpander_32.c:silk_CLZ64 Unexecuted instantiation: table_LSF_cos.c:silk_CLZ64
50
51		/* get number of leading zeros and fractional part (the bits right after the leading one */
52		static OPUS_INLINE void silk_CLZ_FRAC(
53		opus_int32 in, /* I input */
54		opus_int32 lz, / O number of leading zeros */
55		opus_int32 frac_Q7 / O the 7 bits right after the leading one */
56		)
57	0	{
58	0	opus_int32 lzeros = silk_CLZ32(in);
59
60	0	* lz = lzeros;
61	0	* frac_Q7 = silk_ROR32(in, 24 - lzeros) & 0x7f;
62	0	} Unexecuted instantiation: opus_decoder.c:silk_CLZ_FRAC Unexecuted instantiation: vq.c:silk_CLZ_FRAC Unexecuted instantiation: x86cpu.c:silk_CLZ_FRAC Unexecuted instantiation: dec_API.c:silk_CLZ_FRAC Unexecuted instantiation: tables_other.c:silk_CLZ_FRAC Unexecuted instantiation: stereo_MS_to_LR.c:silk_CLZ_FRAC Unexecuted instantiation: resampler.c:silk_CLZ_FRAC Unexecuted instantiation: resampler_private_down_FIR.c:silk_CLZ_FRAC Unexecuted instantiation: resampler_private_IIR_FIR.c:silk_CLZ_FRAC Unexecuted instantiation: resampler_private_up2_HQ.c:silk_CLZ_FRAC Unexecuted instantiation: resampler_rom.c:silk_CLZ_FRAC Unexecuted instantiation: stereo_decode_pred.c:silk_CLZ_FRAC Unexecuted instantiation: init_decoder.c:silk_CLZ_FRAC Unexecuted instantiation: decode_frame.c:silk_CLZ_FRAC Unexecuted instantiation: decode_parameters.c:silk_CLZ_FRAC Unexecuted instantiation: decode_indices.c:silk_CLZ_FRAC Unexecuted instantiation: decode_pulses.c:silk_CLZ_FRAC Unexecuted instantiation: decoder_set_fs.c:silk_CLZ_FRAC Unexecuted instantiation: gain_quant.c:silk_CLZ_FRAC Unexecuted instantiation: NLSF_decode.c:silk_CLZ_FRAC Unexecuted instantiation: PLC.c:silk_CLZ_FRAC Unexecuted instantiation: shell_coder.c:silk_CLZ_FRAC Unexecuted instantiation: tables_gain.c:silk_CLZ_FRAC Unexecuted instantiation: tables_LTP.c:silk_CLZ_FRAC Unexecuted instantiation: tables_NLSF_CB_NB_MB.c:silk_CLZ_FRAC Unexecuted instantiation: tables_NLSF_CB_WB.c:silk_CLZ_FRAC Unexecuted instantiation: tables_pitch_lag.c:silk_CLZ_FRAC Unexecuted instantiation: tables_pulses_per_block.c:silk_CLZ_FRAC Unexecuted instantiation: NLSF_unpack.c:silk_CLZ_FRAC Unexecuted instantiation: bwexpander.c:silk_CLZ_FRAC Unexecuted instantiation: decode_pitch.c:silk_CLZ_FRAC Unexecuted instantiation: lin2log.c:silk_CLZ_FRAC Unexecuted instantiation: log2lin.c:silk_CLZ_FRAC Unexecuted instantiation: LPC_analysis_filter.c:silk_CLZ_FRAC Unexecuted instantiation: LPC_inv_pred_gain.c:silk_CLZ_FRAC Unexecuted instantiation: NLSF2A.c:silk_CLZ_FRAC Unexecuted instantiation: NLSF_stabilize.c:silk_CLZ_FRAC Unexecuted instantiation: pitch_est_tables.c:silk_CLZ_FRAC Unexecuted instantiation: resampler_private_AR2.c:silk_CLZ_FRAC Unexecuted instantiation: sort.c:silk_CLZ_FRAC Unexecuted instantiation: sum_sqr_shift.c:silk_CLZ_FRAC Unexecuted instantiation: LPC_fit.c:silk_CLZ_FRAC Unexecuted instantiation: CNG.c:silk_CLZ_FRAC Unexecuted instantiation: code_signs.c:silk_CLZ_FRAC Unexecuted instantiation: decode_core.c:silk_CLZ_FRAC Unexecuted instantiation: bwexpander_32.c:silk_CLZ_FRAC Unexecuted instantiation: table_LSF_cos.c:silk_CLZ_FRAC
63
64		/* Approximation of square root */
65		/* Accuracy: < +/- 10% for output values > 15 */
66		/* < +/- 2.5% for output values > 120 */
67		static OPUS_INLINE opus_int32 silk_SQRT_APPROX( opus_int32 x )
68	0	{
69	0	opus_int32 y, lz, frac_Q7;
70
71	0	if( x <= 0 ) {
72	0	return 0;
73	0	}
74
75	0	silk_CLZ_FRAC(x, &lz, &frac_Q7);
76
77	0	if( lz & 1 ) {
78	0	y = 32768;
79	0	} else {
80	0	y = 46214; /* 46214 = sqrt(2) * 32768 */
81	0	}
82
83		/* get scaling right */
84	0	y >>= silk_RSHIFT(lz, 1);
85
86		/* increment using fractional part of input */
87	0	y = silk_SMLAWB(y, y, silk_SMULBB(213, frac_Q7));
88
89	0	return y;
90	0	} Unexecuted instantiation: opus_decoder.c:silk_SQRT_APPROX Unexecuted instantiation: vq.c:silk_SQRT_APPROX Unexecuted instantiation: x86cpu.c:silk_SQRT_APPROX Unexecuted instantiation: dec_API.c:silk_SQRT_APPROX Unexecuted instantiation: tables_other.c:silk_SQRT_APPROX Unexecuted instantiation: stereo_MS_to_LR.c:silk_SQRT_APPROX Unexecuted instantiation: resampler.c:silk_SQRT_APPROX Unexecuted instantiation: resampler_private_down_FIR.c:silk_SQRT_APPROX Unexecuted instantiation: resampler_private_IIR_FIR.c:silk_SQRT_APPROX Unexecuted instantiation: resampler_private_up2_HQ.c:silk_SQRT_APPROX Unexecuted instantiation: resampler_rom.c:silk_SQRT_APPROX Unexecuted instantiation: stereo_decode_pred.c:silk_SQRT_APPROX Unexecuted instantiation: init_decoder.c:silk_SQRT_APPROX Unexecuted instantiation: decode_frame.c:silk_SQRT_APPROX Unexecuted instantiation: decode_parameters.c:silk_SQRT_APPROX Unexecuted instantiation: decode_indices.c:silk_SQRT_APPROX Unexecuted instantiation: decode_pulses.c:silk_SQRT_APPROX Unexecuted instantiation: decoder_set_fs.c:silk_SQRT_APPROX Unexecuted instantiation: gain_quant.c:silk_SQRT_APPROX Unexecuted instantiation: NLSF_decode.c:silk_SQRT_APPROX Unexecuted instantiation: PLC.c:silk_SQRT_APPROX Unexecuted instantiation: shell_coder.c:silk_SQRT_APPROX Unexecuted instantiation: tables_gain.c:silk_SQRT_APPROX Unexecuted instantiation: tables_LTP.c:silk_SQRT_APPROX Unexecuted instantiation: tables_NLSF_CB_NB_MB.c:silk_SQRT_APPROX Unexecuted instantiation: tables_NLSF_CB_WB.c:silk_SQRT_APPROX Unexecuted instantiation: tables_pitch_lag.c:silk_SQRT_APPROX Unexecuted instantiation: tables_pulses_per_block.c:silk_SQRT_APPROX Unexecuted instantiation: NLSF_unpack.c:silk_SQRT_APPROX Unexecuted instantiation: bwexpander.c:silk_SQRT_APPROX Unexecuted instantiation: decode_pitch.c:silk_SQRT_APPROX Unexecuted instantiation: lin2log.c:silk_SQRT_APPROX Unexecuted instantiation: log2lin.c:silk_SQRT_APPROX Unexecuted instantiation: LPC_analysis_filter.c:silk_SQRT_APPROX Unexecuted instantiation: LPC_inv_pred_gain.c:silk_SQRT_APPROX Unexecuted instantiation: NLSF2A.c:silk_SQRT_APPROX Unexecuted instantiation: NLSF_stabilize.c:silk_SQRT_APPROX Unexecuted instantiation: pitch_est_tables.c:silk_SQRT_APPROX Unexecuted instantiation: resampler_private_AR2.c:silk_SQRT_APPROX Unexecuted instantiation: sort.c:silk_SQRT_APPROX Unexecuted instantiation: sum_sqr_shift.c:silk_SQRT_APPROX Unexecuted instantiation: LPC_fit.c:silk_SQRT_APPROX Unexecuted instantiation: CNG.c:silk_SQRT_APPROX Unexecuted instantiation: code_signs.c:silk_SQRT_APPROX Unexecuted instantiation: decode_core.c:silk_SQRT_APPROX Unexecuted instantiation: bwexpander_32.c:silk_SQRT_APPROX Unexecuted instantiation: table_LSF_cos.c:silk_SQRT_APPROX
91
92		/* Divide two int32 values and return result as int32 in a given Q-domain */
93		static OPUS_INLINE opus_int32 silk_DIV32_varQ( /* O returns a good approximation of "(a32 << Qres) / b32" */
94		const opus_int32 a32, /* I numerator (Q0) */
95		const opus_int32 b32, /* I denominator (Q0) */
96		const opus_int Qres /* I Q-domain of result (>= 0) */
97		)
98	0	{
99	0	opus_int a_headrm, b_headrm, lshift;
100	0	opus_int32 b32_inv, a32_nrm, b32_nrm, result;
101
102	0	silk_assert( b32 != 0 );
103	0	silk_assert( Qres >= 0 );
104
105		/* Compute number of bits head room and normalize inputs */
106	0	a_headrm = silk_CLZ32( silk_abs(a32) ) - 1;
107	0	a32_nrm = silk_LSHIFT(a32, a_headrm); /* Q: a_headrm */
108	0	b_headrm = silk_CLZ32( silk_abs(b32) ) - 1;
109	0	b32_nrm = silk_LSHIFT(b32, b_headrm); /* Q: b_headrm */
110
111		/* Inverse of b32, with 14 bits of precision */
112	0	b32_inv = silk_DIV32_16( silk_int32_MAX >> 2, silk_RSHIFT(b32_nrm, 16) ); /* Q: 29 + 16 - b_headrm */
113
114		/* First approximation */
115	0	result = silk_SMULWB(a32_nrm, b32_inv); /* Q: 29 + a_headrm - b_headrm */
116
117		/* Compute residual by subtracting product of denominator and first approximation */
118		/* It's OK to overflow because the final value of a32_nrm should always be small */
119	0	a32_nrm = silk_SUB32_ovflw(a32_nrm, silk_LSHIFT_ovflw( silk_SMMUL(b32_nrm, result), 3 )); /* Q: a_headrm */
120
121		/* Refinement */
122	0	result = silk_SMLAWB(result, a32_nrm, b32_inv); /* Q: 29 + a_headrm - b_headrm */
123
124		/* Convert to Qres domain */
125	0	lshift = 29 + a_headrm - b_headrm - Qres;
126	0	if( lshift < 0 ) {
127	0	return silk_LSHIFT_SAT32(result, -lshift);
128	0	} else {
129	0	if( lshift < 32){
130	0	return silk_RSHIFT(result, lshift);
131	0	} else {
132		/* Avoid undefined result */
133	0	return 0;
134	0	}
135	0	}
136	0	} Unexecuted instantiation: opus_decoder.c:silk_DIV32_varQ Unexecuted instantiation: vq.c:silk_DIV32_varQ Unexecuted instantiation: x86cpu.c:silk_DIV32_varQ Unexecuted instantiation: dec_API.c:silk_DIV32_varQ Unexecuted instantiation: tables_other.c:silk_DIV32_varQ Unexecuted instantiation: stereo_MS_to_LR.c:silk_DIV32_varQ Unexecuted instantiation: resampler.c:silk_DIV32_varQ Unexecuted instantiation: resampler_private_down_FIR.c:silk_DIV32_varQ Unexecuted instantiation: resampler_private_IIR_FIR.c:silk_DIV32_varQ Unexecuted instantiation: resampler_private_up2_HQ.c:silk_DIV32_varQ Unexecuted instantiation: resampler_rom.c:silk_DIV32_varQ Unexecuted instantiation: stereo_decode_pred.c:silk_DIV32_varQ Unexecuted instantiation: init_decoder.c:silk_DIV32_varQ Unexecuted instantiation: decode_frame.c:silk_DIV32_varQ Unexecuted instantiation: decode_parameters.c:silk_DIV32_varQ Unexecuted instantiation: decode_indices.c:silk_DIV32_varQ Unexecuted instantiation: decode_pulses.c:silk_DIV32_varQ Unexecuted instantiation: decoder_set_fs.c:silk_DIV32_varQ Unexecuted instantiation: gain_quant.c:silk_DIV32_varQ Unexecuted instantiation: NLSF_decode.c:silk_DIV32_varQ Unexecuted instantiation: PLC.c:silk_DIV32_varQ Unexecuted instantiation: shell_coder.c:silk_DIV32_varQ Unexecuted instantiation: tables_gain.c:silk_DIV32_varQ Unexecuted instantiation: tables_LTP.c:silk_DIV32_varQ Unexecuted instantiation: tables_NLSF_CB_NB_MB.c:silk_DIV32_varQ Unexecuted instantiation: tables_NLSF_CB_WB.c:silk_DIV32_varQ Unexecuted instantiation: tables_pitch_lag.c:silk_DIV32_varQ Unexecuted instantiation: tables_pulses_per_block.c:silk_DIV32_varQ Unexecuted instantiation: NLSF_unpack.c:silk_DIV32_varQ Unexecuted instantiation: bwexpander.c:silk_DIV32_varQ Unexecuted instantiation: decode_pitch.c:silk_DIV32_varQ Unexecuted instantiation: lin2log.c:silk_DIV32_varQ Unexecuted instantiation: log2lin.c:silk_DIV32_varQ Unexecuted instantiation: LPC_analysis_filter.c:silk_DIV32_varQ Unexecuted instantiation: LPC_inv_pred_gain.c:silk_DIV32_varQ Unexecuted instantiation: NLSF2A.c:silk_DIV32_varQ Unexecuted instantiation: NLSF_stabilize.c:silk_DIV32_varQ Unexecuted instantiation: pitch_est_tables.c:silk_DIV32_varQ Unexecuted instantiation: resampler_private_AR2.c:silk_DIV32_varQ Unexecuted instantiation: sort.c:silk_DIV32_varQ Unexecuted instantiation: sum_sqr_shift.c:silk_DIV32_varQ Unexecuted instantiation: LPC_fit.c:silk_DIV32_varQ Unexecuted instantiation: CNG.c:silk_DIV32_varQ Unexecuted instantiation: code_signs.c:silk_DIV32_varQ Unexecuted instantiation: decode_core.c:silk_DIV32_varQ Unexecuted instantiation: bwexpander_32.c:silk_DIV32_varQ Unexecuted instantiation: table_LSF_cos.c:silk_DIV32_varQ
137
138		/* Invert int32 value and return result as int32 in a given Q-domain */
139		static OPUS_INLINE opus_int32 silk_INVERSE32_varQ( /* O returns a good approximation of "(1 << Qres) / b32" */
140		const opus_int32 b32, /* I denominator (Q0) */
141		const opus_int Qres /* I Q-domain of result (> 0) */
142		)
143	0	{
144	0	opus_int b_headrm, lshift;
145	0	opus_int32 b32_inv, b32_nrm, err_Q32, result;
146
147	0	silk_assert( b32 != 0 );
148	0	silk_assert( Qres > 0 );
149
150		/* Compute number of bits head room and normalize input */
151	0	b_headrm = silk_CLZ32( silk_abs(b32) ) - 1;
152	0	b32_nrm = silk_LSHIFT(b32, b_headrm); /* Q: b_headrm */
153
154		/* Inverse of b32, with 14 bits of precision */
155	0	b32_inv = silk_DIV32_16( silk_int32_MAX >> 2, silk_RSHIFT(b32_nrm, 16) ); /* Q: 29 + 16 - b_headrm */
156
157		/* First approximation */
158	0	result = silk_LSHIFT(b32_inv, 16); /* Q: 61 - b_headrm */
159
160		/* Compute residual by subtracting product of denominator and first approximation from one */
161	0	err_Q32 = silk_LSHIFT( ((opus_int32)1<<29) - silk_SMULWB(b32_nrm, b32_inv), 3 ); /* Q32 */
162
163		/* Refinement */
164	0	result = silk_SMLAWW(result, err_Q32, b32_inv); /* Q: 61 - b_headrm */
165
166		/* Convert to Qres domain */
167	0	lshift = 61 - b_headrm - Qres;
168	0	if( lshift <= 0 ) {
169	0	return silk_LSHIFT_SAT32(result, -lshift);
170	0	} else {
171	0	if( lshift < 32){
172	0	return silk_RSHIFT(result, lshift);
173	0	}else{
174		/* Avoid undefined result */
175	0	return 0;
176	0	}
177	0	}
178	0	} Unexecuted instantiation: opus_decoder.c:silk_INVERSE32_varQ Unexecuted instantiation: vq.c:silk_INVERSE32_varQ Unexecuted instantiation: x86cpu.c:silk_INVERSE32_varQ Unexecuted instantiation: dec_API.c:silk_INVERSE32_varQ Unexecuted instantiation: tables_other.c:silk_INVERSE32_varQ Unexecuted instantiation: stereo_MS_to_LR.c:silk_INVERSE32_varQ Unexecuted instantiation: resampler.c:silk_INVERSE32_varQ Unexecuted instantiation: resampler_private_down_FIR.c:silk_INVERSE32_varQ Unexecuted instantiation: resampler_private_IIR_FIR.c:silk_INVERSE32_varQ Unexecuted instantiation: resampler_private_up2_HQ.c:silk_INVERSE32_varQ Unexecuted instantiation: resampler_rom.c:silk_INVERSE32_varQ Unexecuted instantiation: stereo_decode_pred.c:silk_INVERSE32_varQ Unexecuted instantiation: init_decoder.c:silk_INVERSE32_varQ Unexecuted instantiation: decode_frame.c:silk_INVERSE32_varQ Unexecuted instantiation: decode_parameters.c:silk_INVERSE32_varQ Unexecuted instantiation: decode_indices.c:silk_INVERSE32_varQ Unexecuted instantiation: decode_pulses.c:silk_INVERSE32_varQ Unexecuted instantiation: decoder_set_fs.c:silk_INVERSE32_varQ Unexecuted instantiation: gain_quant.c:silk_INVERSE32_varQ Unexecuted instantiation: NLSF_decode.c:silk_INVERSE32_varQ Unexecuted instantiation: PLC.c:silk_INVERSE32_varQ Unexecuted instantiation: shell_coder.c:silk_INVERSE32_varQ Unexecuted instantiation: tables_gain.c:silk_INVERSE32_varQ Unexecuted instantiation: tables_LTP.c:silk_INVERSE32_varQ Unexecuted instantiation: tables_NLSF_CB_NB_MB.c:silk_INVERSE32_varQ Unexecuted instantiation: tables_NLSF_CB_WB.c:silk_INVERSE32_varQ Unexecuted instantiation: tables_pitch_lag.c:silk_INVERSE32_varQ Unexecuted instantiation: tables_pulses_per_block.c:silk_INVERSE32_varQ Unexecuted instantiation: NLSF_unpack.c:silk_INVERSE32_varQ Unexecuted instantiation: bwexpander.c:silk_INVERSE32_varQ Unexecuted instantiation: decode_pitch.c:silk_INVERSE32_varQ Unexecuted instantiation: lin2log.c:silk_INVERSE32_varQ Unexecuted instantiation: log2lin.c:silk_INVERSE32_varQ Unexecuted instantiation: LPC_analysis_filter.c:silk_INVERSE32_varQ Unexecuted instantiation: LPC_inv_pred_gain.c:silk_INVERSE32_varQ Unexecuted instantiation: NLSF2A.c:silk_INVERSE32_varQ Unexecuted instantiation: NLSF_stabilize.c:silk_INVERSE32_varQ Unexecuted instantiation: pitch_est_tables.c:silk_INVERSE32_varQ Unexecuted instantiation: resampler_private_AR2.c:silk_INVERSE32_varQ Unexecuted instantiation: sort.c:silk_INVERSE32_varQ Unexecuted instantiation: sum_sqr_shift.c:silk_INVERSE32_varQ Unexecuted instantiation: LPC_fit.c:silk_INVERSE32_varQ Unexecuted instantiation: CNG.c:silk_INVERSE32_varQ Unexecuted instantiation: code_signs.c:silk_INVERSE32_varQ Unexecuted instantiation: decode_core.c:silk_INVERSE32_varQ Unexecuted instantiation: bwexpander_32.c:silk_INVERSE32_varQ Unexecuted instantiation: table_LSF_cos.c:silk_INVERSE32_varQ
179
180		#endif /* SILK_FIX_INLINES_H */

Coverage Report

Created: 2026-06-07 07:05