sigproc: Make convolution and convert input buffers immutable
For good practice, use const specifier when applicable. Signed-off-by: Tom Tsou <tom@tsou.cc>
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@ -1,7 +1,7 @@
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#ifndef _CONVERT_H_
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#define _CONVERT_H_
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void convert_float_short(short *out, float *in, float scale, int len);
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void convert_short_float(float *out, short *in, int len);
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void convert_float_short(short *out, const float *in, float scale, int len);
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void convert_short_float(float *out, const short *in, int len);
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#endif /* _CONVERT_H_ */
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@ -3,26 +3,26 @@
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void *convolve_h_alloc(int num);
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int convolve_real(float *x, int x_len,
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float *h, int h_len,
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int convolve_real(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset);
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int convolve_complex(float *x, int x_len,
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float *h, int h_len,
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int convolve_complex(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset);
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int base_convolve_real(float *x, int x_len,
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float *h, int h_len,
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int base_convolve_real(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset);
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int base_convolve_complex(float *x, int x_len,
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float *h, int h_len,
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int base_convolve_complex(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset);
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@ -26,21 +26,21 @@
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#endif
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/* Base multiply and accumulate complex-real */
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static void mac_real(float *x, float *h, float *y)
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static void mac_real(const float *x, const float *h, float *y)
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{
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y[0] += x[0] * h[0];
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y[1] += x[1] * h[0];
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}
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/* Base multiply and accumulate complex-complex */
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static void mac_cmplx(float *x, float *h, float *y)
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static void mac_cmplx(const float *x, const float *h, float *y)
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{
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y[0] += x[0] * h[0] - x[1] * h[1];
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y[1] += x[0] * h[1] + x[1] * h[0];
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}
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/* Base vector complex-complex multiply and accumulate */
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static void mac_real_vec_n(float *x, float *h, float *y,
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static void mac_real_vec_n(const float *x, const float *h, float *y,
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int len, int step, int offset)
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{
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for (int i = offset; i < len; i += step)
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@ -48,7 +48,7 @@ static void mac_real_vec_n(float *x, float *h, float *y,
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}
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/* Base vector complex-complex multiply and accumulate */
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static void mac_cmplx_vec_n(float *x, float *h, float *y,
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static void mac_cmplx_vec_n(const float *x, const float *h, float *y,
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int len, int step, int offset)
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{
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for (int i = offset; i < len; i += step)
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@ -56,8 +56,8 @@ static void mac_cmplx_vec_n(float *x, float *h, float *y,
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}
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/* Base complex-real convolution */
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int _base_convolve_real(float *x, int x_len,
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float *h, int h_len,
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int _base_convolve_real(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset)
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@ -73,8 +73,8 @@ int _base_convolve_real(float *x, int x_len,
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}
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/* Base complex-complex convolution */
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int _base_convolve_complex(float *x, int x_len,
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float *h, int h_len,
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int _base_convolve_complex(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset)
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@ -110,8 +110,8 @@ int bounds_check(int x_len, int h_len, int y_len,
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}
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/* API: Non-aligned (no SSE) complex-real */
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int base_convolve_real(float *x, int x_len,
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float *h, int h_len,
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int base_convolve_real(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset)
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@ -128,8 +128,8 @@ int base_convolve_real(float *x, int x_len,
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}
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/* API: Non-aligned (no SSE) complex-complex */
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int base_convolve_complex(float *x, int x_len,
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float *h, int h_len,
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int base_convolve_complex(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset)
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@ -34,7 +34,7 @@
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/* 16*N 16-bit signed integer converted to single precision floats */
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static void _sse_convert_si16_ps_16n(float *restrict out,
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short *restrict in,
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const short *restrict in,
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int len)
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{
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__m128i m0, m1, m2, m3, m4, m5;
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/* 16*N 16-bit signed integer conversion with remainder */
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static void _sse_convert_si16_ps(float *restrict out,
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short *restrict in,
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const short *restrict in,
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int len)
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{
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int start = len / 16 * 16;
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@ -83,7 +83,7 @@ static void _sse_convert_si16_ps(float *restrict out,
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/* 8*N single precision floats scaled and converted to 16-bit signed integer */
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static void _sse_convert_scale_ps_si16_8n(short *restrict out,
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float *restrict in,
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const float *restrict in,
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float scale, int len)
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{
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__m128 m0, m1, m2;
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/* 8*N single precision floats scaled and converted with remainder */
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static void _sse_convert_scale_ps_si16(short *restrict out,
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float *restrict in,
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const float *restrict in,
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float scale, int len)
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{
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int start = len / 8 * 8;
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/* 16*N single precision floats scaled and converted to 16-bit signed integer */
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static void _sse_convert_scale_ps_si16_16n(short *restrict out,
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float *restrict in,
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const float *restrict in,
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float scale, int len)
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{
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__m128 m0, m1, m2, m3, m4;
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}
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}
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#else /* HAVE_SSE3 */
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static void convert_scale_ps_si16(short *out, float *in, float scale, int len)
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static void convert_scale_ps_si16(short *out, const float *in,
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float scale, int len)
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{
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for (int i = 0; i < len; i++)
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out[i] = in[i] * scale;
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#endif
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#ifndef HAVE_SSE4_1
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static void convert_si16_ps(float *out, short *in, int len)
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static void convert_si16_ps(float *out, const short *in, int len)
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{
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for (int i = 0; i < len; i++)
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out[i] = in[i];
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}
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#endif
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void convert_float_short(short *out, float *in, float scale, int len)
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void convert_float_short(short *out, const float *in, float scale, int len)
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{
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#ifdef HAVE_SSE3
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if (!(len % 16))
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#endif
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}
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void convert_short_float(float *out, short *in, int len)
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void convert_short_float(float *out, const short *in, int len)
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{
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#ifdef HAVE_SSE4_1
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if (!(len % 16))
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#endif
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/* Forward declarations from base implementation */
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int _base_convolve_real(float *x, int x_len,
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float *h, int h_len,
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int _base_convolve_real(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset);
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int _base_convolve_complex(float *x, int x_len,
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float *h, int h_len,
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int _base_convolve_complex(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset);
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#include <pmmintrin.h>
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/* 4-tap SSE complex-real convolution */
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static void sse_conv_real4(float *restrict x,
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float *restrict h,
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static void sse_conv_real4(const float *restrict x,
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const float *restrict h,
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float *restrict y,
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int len)
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{
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}
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/* 8-tap SSE complex-real convolution */
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static void sse_conv_real8(float *restrict x,
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float *restrict h,
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static void sse_conv_real8(const float *restrict x,
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const float *restrict h,
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float *restrict y,
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int len)
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{
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}
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/* 12-tap SSE complex-real convolution */
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static void sse_conv_real12(float *restrict x,
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float *restrict h,
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static void sse_conv_real12(const float *restrict x,
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const float *restrict h,
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float *restrict y,
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int len)
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{
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}
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/* 16-tap SSE complex-real convolution */
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static void sse_conv_real16(float *restrict x,
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float *restrict h,
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static void sse_conv_real16(const float *restrict x,
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const float *restrict h,
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float *restrict y,
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int len)
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{
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}
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/* 20-tap SSE complex-real convolution */
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static void sse_conv_real20(float *restrict x,
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float *restrict h,
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static void sse_conv_real20(const float *restrict x,
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const float *restrict h,
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float *restrict y,
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int len)
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{
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}
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/* 4*N-tap SSE complex-real convolution */
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static void sse_conv_real4n(float *x, float *h, float *y, int h_len, int len)
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static void sse_conv_real4n(const float *x,
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const float *h,
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float *y,
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int h_len, int len)
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{
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__m128 m0, m1, m2, m4, m5, m6, m7;
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}
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/* 4*N-tap SSE complex-complex convolution */
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static void sse_conv_cmplx_4n(float *x, float *h, float *y, int h_len, int len)
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static void sse_conv_cmplx_4n(const float *x,
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const float *h,
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float *y,
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int h_len, int len)
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{
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__m128 m0, m1, m2, m3, m4, m5, m6, m7;
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}
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/* 8*N-tap SSE complex-complex convolution */
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static void sse_conv_cmplx_8n(float *x, float *h, float *y, int h_len, int len)
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static void sse_conv_cmplx_8n(const float *x,
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const float *h,
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float *y,
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int h_len, int len)
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{
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__m128 m0, m1, m2, m3, m4, m5, m6, m7;
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__m128 m8, m9, m10, m11, m12, m13, m14, m15;
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#endif
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/* API: Aligned complex-real */
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int convolve_real(float *x, int x_len,
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float *h, int h_len,
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int convolve_real(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset)
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{
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void (*conv_func)(float *, float *, float *, int) = NULL;
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void (*conv_func_n)(float *, float *, float *, int, int) = NULL;
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void (*conv_func)(const float *, const float *,
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float *, int) = NULL;
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void (*conv_func_n)(const float *, const float *,
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float *, int, int) = NULL;
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if (bounds_check(x_len, h_len, y_len, start, len, step) < 0)
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return -1;
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}
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/* API: Aligned complex-complex */
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int convolve_complex(float *x, int x_len,
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float *h, int h_len,
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int convolve_complex(const float *x, int x_len,
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const float *h, int h_len,
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float *y, int y_len,
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int start, int len,
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int step, int offset)
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{
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void (*conv_func)(float *, float *, float *, int, int) = NULL;
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void (*conv_func)(const float *, const float *,
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float *, int, int) = NULL;
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if (bounds_check(x_len, h_len, y_len, start, len, step) < 0)
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return -1;
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